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Wågberg, Johan, and Viklund Emanuel Walldén. "Continuous Occupancy Mapping Using Gaussian Processes." Thesis, Linköpings universitet, Reglerteknik, 2012. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-81464.
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The topic of this thesis is occupancy mapping for mobile robots, with an emphasis on a novel method for continuous occupancy mapping using Gaussian processes. In the new method, spatial correlation is accounted for in a natural way, and an a priori discretization of the area to be mapped is not necessary as within most other common methods. The main contribution of this thesis is the construction of a Gaussian process library for C++, and the use of this library to implement the continuous occupancy mapping algorithm. The continuous occupancy mapping is evaluated using both simulated and real world experimental data. The main result is that the method, in its current form, is not fit for online operations due to its computational complexity. By using approximations and ad hoc solutions, the method can be run in real time on a mobile robot, though not without losing many of its benefits.
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Stover, Derrick D. "Continuous Mappings and Some New Classes of Spaces." View abstract, 2009. http://gateway.proquest.com/openurl?url_ver=Z39.88-2004&res_dat=xri:pqdiss&rft_val_fmt=info:ofi/fmt:kev:mtx:dissertation&rft_dat=xri:pqdiss:3371579.
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Quintero, Perez Guillermo. "Approach to acoustic mapping through continuous mobile monitoring." Doctoral thesis, Universitat Politècnica de Catalunya, 2019. http://hdl.handle.net/10803/667259.
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For the production of representative noise maps, a large amount of information is necessary, which includes, among others, on-site measurements of environmental noise. Thus, for noise maps based on measurements, mobile sampling emerges as a possible solution for the enhancement of data acquisition.
The present research proposes a complete framework to perform mobile sampling. Since the normative requires long-term values to be presented in a noise map, a sampling strategy based on temporal stratification, which reduces the required sampled days to estimate the annual equivalent noise level, is presented. Furthermore, to compute long-term values for the night period, since they are usually affected by noise sources different to traffic, specifically leisure noise, a complementary temporal and spatial stratification is also presented.
Then, the statistical requirements to perform mobile noise measurements using bicycles is evaluated. The vehicles and bicycles journeys are reproduced based on micro-traffic simulation and then coupled with an acoustic modeling. The estimation error of LAeq for the mobile sampling is compared to reference static samples, in terms of the Root Mean Square Error (RMSE), and is computed for different aggregation radius of mobile receivers, and as a function of the number of passes-by and to the distance to its nearest cross street.
To perform the mobile sampling on a real scenario, a low-cost noise monitoring device with the aim of performing georeferenced noise sampling, is developed. The accuracy tests suggest that it is able to acquire noise levels with an equivalent accuracy as a Class 2 sound level meter.
Finally, to validate the results obtained through the modeling framework, a noise monitoring device is mounted on a bicycle and on-site mobile measurements are performed simultaneously to reference static ones. The same scenario is again recreated based on micro-simulation of traffic complemented with acoustic modeling. Then, for the simulated framework and the on-site measurements, the RMSE of the estimation of LAeq for different aggregation radius of mobile samples is compared to the reference static ones. It is confirmed that mobile sampling is a solution to improve noise data acquisition, which reduces the resources required to produce a noise map without sacrificing the accuracy and representativeness.Para la producción de mapas de ruido representativos, una gran cantidad de información es necesaria, que incluye, entre otras, mediciones de ruido ambiental en sitio. Por lo tanto, para los mapas de ruido basados en mediciones, el muestreo móvil surge como una posible solución para mejorar la adquisición de datos. La presente investigación propone un marco completo para realizar el muestreo móvil. Dado que la normativa requiere de valores de largo plazo para realizar un mapa de ruido, se propone una estrategia de muestreo basada en estratificación temporal que reduce los días de muestreo necesarios para estimar el nivel de ruido equivalente anual. Además, para calcular los valores a largo plazo para el período nocturno, ya que generalmente se ve afectado por fuentes de ruido distintas al tráfico, específicamente de ruido de ocio, se presenta una estratificación temporal y espacial complementaria. Por otra parte, se evalúan los requisitos estadísticos para realizar mediciones de ruido móviles utilizando bicicletas. Los trayectos de los vehículos y las bicicletas se reproducen en base a una microsimulación de tráfico para después combinarse con modelado acústico. El error de estimación del indicador LAeq calculado con el muestreo móvil se compara, en términos del error cuadrático medio (RMSE), con muestras de referencia obtenidas de forma estática para diferentes radios de agregación de receptores móviles, y también en función del número de pases y de la distancia al cruce de calles más cercano. Para realizar el muestreo móvil en un escenario real, se desarrolla un dispositivo de monitoreo de ruido de bajo costo con el objetivo de realizar un muestreo de ruido georreferenciado. Las pruebas de precisión muestran que es capaz de adquirir niveles de ruido con una precisión equivalente a un sonómetro de Clase 2. Finalmente, para validar los resultados obtenidos a través de las simulaciones, se equipa una bicicleta con el dispositivo de monitoreo y se realizan mediciones móviles en sitio al mismo tiempo que mediciones estáticas de referencia. El mismo escenario se recrea basándose nuevamente en una microsimulación de tráfico complementada con modelado acústico. Después, para los niveles de ruido simulados y las mediciones en sitio, el RMSE de la estimación del indicador LAeq para distintos radios de agregación de muestras móviles se compara con el muestreo estático de referencia. Con ello, se confirma que el muestreo móvil es una solución para mejorar la adquisición de datos de ruido, lo que reduce los recursos necesarios para producir un mapa de ruido sin sacrificar la precisión y la representatividad.
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Fitzpatrick, Michael Colin. "Continuous families of representations of mapping class groups." Diss., University of Iowa, 2014. https://ir.uiowa.edu/etd/1316.
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The study of mapping class groups began in the 1920s with Max Dehn and Jakob Nielsen. It was about this time that topology was just being developed, so mapping class groups were of immediate interest, being invariants of topological spaces. The works of Dehn and Nielsen were continued by William Harvey in the 1960s and 70s leading to the development of the curve complex, an important construction still very relevant to mathematics today. William Thurston is another important name in this area since he was able to completely classify homeomorphisms of surfaces in 1976, leading to the famous "Nielsen-Thurston Classification Theorem".
Representations were first studied by Carl Gauss in the early 1800s and then explored more thoroughly by Ferdinand Frobenius and Richard Dedekind, among others, at the end of that century. Representation theory has since grown into an extremely important and active area of mathematics today because of its widespread applications to other areas of mathematics and even to other subject areas like physics.
Quantum group theory is the youngest area in which this thesis has its roots. This area was formalized and studied extensively for the first time in the 1980s by such mathematicians as Vladimir Drinfeld, Michio Jimbo, and Nicolai Reshetikhin, and immediately found applications in mathematics and theoretical physics. Like representation theory, the study of quantum groups is currently a highly active area of mathematics due to its widespread applications across the mathematical spectrum.
In this paper I will present two different methods of constructing projective representations of mapping class groups of surfaces. I will then prove some interesting results concerning each of these methods.
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Lathrop, Benjamin H. (Benjamin Hurst). "Evaluating a continuous improvement initiative using Stakeholder Value Mapping." Thesis, Massachusetts Institute of Technology, 2006. http://hdl.handle.net/1721.1/37249.
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Thesis (M.B.A.)--Massachusetts Institute of Technology, Sloan School of Management; and, (S.M.)--Massachusetts Institute of Technology, Dept. of Chemical Engineering; in conjunction with the Leaders for Manufacturing Program at MIT, 2006.Vita.
Includes bibliographical references (p. 42).
Lean implementations have had a mixed record of success in organizations. One possible explanation for this observation is that lean is built upon a value system that is not always shared by the organizations trying to implement the philosophy. For example, one element of lean is that employees at all levels of the organization are expected to share ideas for improving processes. This idea might seem foreign in companies where responsibility for process improvement comes only from management or specialized departments. Lean would not be expected to flourish in an environment where employee innovation and initiative is not valued. As this example demonstrates, lean loses its effectiveness when its values are incompatible with those prevailing in an organization. Determining this compatibility has not been straightforward to date. Whereas lean literature is filled with methods and tools for discovering and removing waste, there is little guidance on how to determine if lean can be successfully applied to an organization's unique socio-technical system. Stakeholder Value Mapping (SVM), a technique adapted from the field of Enterprise Management, is presented to address this need.
(cont.) Whereas SVM has already been developed for use at the enterprise level, this thesis aims to extend the applicability of SVM to the micro level. A methodology for mapping stakeholder values around a specific lean project at Raytheon's Integrated Air Defense Center is developed. The project, a pull system for bolted cabinets, is described in detail in this thesis as a case study. We find that SVM alone does not yield sufficient data to guide lean implementations. It is, however, an effective method for understanding the stakeholder interests that can serve as barriers to lean. Leaders trying to bring lean into their organizations will find SVM a promising tool for determining where to initially focus their attention. If lean and stakeholder values are aligned, the groundwork will be set for a traditional lean implementation that focuses on well-known tools for discovering and removing waste. On the other hand, if lean and stakeholder values differ significantly, consideration should first be given to aligning organizational interests with the lean strategy.
by Benjamin H. Lathrop.
S.M.
M.B.A.
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Carreira-Perpinan, Miguel Angel. "Continuous latent variable models for dimensionality reduction and sequential data reconstruction." Thesis, University of Sheffield, 2001. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.369991.
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Kondrath, Andrew Stephen. "Frequency Modulated Continuous Wave Radar and Video Fusion for Simultaneous Localization and Mapping." Wright State University / OhioLINK, 2012. http://rave.ohiolink.edu/etdc/view?acc_num=wright1347715085.
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Kamma, Tarani Kanth. "Framework for Lean thinking approach in healthcare corporations: Value stream mapping to reduce patient waiting time." OpenSIUC, 2010. https://opensiuc.lib.siu.edu/theses/290.
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Lean techniques are tools that reduce waste in the process and create value for the end-customer. Initially, the concept of lean thinking started in manufacturing, but with the tremendous advantages it offers in terms of value creation for the customer, defect reduction, increase of profits for corporations, it has been recognized as an important tool across a wide spectrum of industries. Although Healthcare industry has started applying these techniques, there is very little work published on how to apply these techniques to this particular industry. In this study, a framework for applying lean thinking to healthcare industries is presented. The framework depicts a systematic methodology for identifying value streams. The framework was developed specifically for the healthcare industry, but it can be applied to service industry in general. A case study is presented on how to apply this framework. Value stream mapping has been conducted at a clinic to identify areas of improvement. The components of the developed framework have been used to define a future state of process based on input from process owners, nurses, physicians, and patient surveys. The study has identified factors that influence the success of implementation of lean techniques in healthcare. Also the potential for future work has been identified.
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Silva, Júnior Anderson Rodrigues da. "Piecewise linear continuous-curvature path planning for autonomous vehicles." Universidade de São Paulo, 2018. http://www.teses.usp.br/teses/disponiveis/18/18153/tde-02032018-095552/.
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Autonomous vehicles have increasingly become an attractive field due its promising capabilities of improvements regarding safety, comfort, traffic flow etc. A required attribute for those vehicles is the ability of autonomously compute its path towards a destination point. The path must be planned considering the constructive aspects of the vehicle in order to guarantee the maneuver feasibility. This work consists on computing a feasible path for autonomous vehicles with non-holonomic constraints. Piecewise linear continuouscurvature paths constituted of clothoids, circular arcs, and straight lines are used for this purpose, providing passenger\'s comfort. The road network is modeled from GPS (Global Positioning System) vehicle trajectories by defining lanes, roundabouts and intersections. GPS points are used later to parameterize lanes using clothoids and to extract roundabout centers and radii. This approach provides a sparse road network model since GPS points are replaced by parameterized curves. The information about connections between roads coming from the model is used by a global path planner, which computes a minimal length route from the vehicle current position to the destination point. After that, path planners compute intersection and roundabout paths depending on the nature of connections between roads. Also, lanes changes are performed to obey traffic rules. These three path planners that connects adjacent roads use clothoids, circular arc, and straight lines as interpolating curves whose curvature is constrained to that the vehicle can perform: the intersection path planner uses only a minimal amount of steering to perform the maneuver, increasing the comfort level; the roundabout path planner takes the roundabout center and radius as well as parameters that defines the entrance and exit maneuvers to compute the path; the lane change path planner connects lanes belonging to the same road with a prescribed longitudinal traveled distance depending on whether this maneuver is required. In the end, an global continuous-curvature path is generated. As the result of this work, a real urban scenario is modeled and the proposed approaches are validated.Veículos autônomos têm cada vez mais se tornado um campo atraente de pesquisa devido às suas capacidades promissoras de melhorias em segurança, conforto, fluxo de tráfego, etc. Um atributo necessário para esses veículos é a capacidade de calcular, de forma autônoma, o seu caminho para um ponto de destino. O percurso deve ser planejado considerando os aspectos construtivos do veículo para que a viabilidade das manobras a serem executadas seja garantida. Este trabalho consiste no planejamento de trajetória para veículos autônomos com restrições não-holonômicas. Utilizam-se, para esse efeito, trajetórias cuja curvatura seja contínua e linear por partes, constituídas por clotóides, arcos de circunferência e retas, de forma a proporcionar conforto aos passageiros. A topologia de vias é modelada a partir de trajetórias definidas por pontos de GPS (Sistema de Posicionamento Global), definindo pistas, rotatórias e cruzamentos. Pontos de GPS são usados posteriormente para parametrizar as pistas usando clotóides a para extrair centros e raios das rotatórias. Essa abordagem proporciona um modelo esparso de topologia de vias uma vez que pontos de GPS são substituídos por curvas parametrizadas. A informação a cerca das conexões entre vias advinda do modelo é usada por um planejador de caminho global, o qual calcula a rota mais curta da posição atual do veículo até seu ponto de destino. Após essa etapa, planejadores calculam caminhos em cruzamentos e rotatórias dependendo do tipo de conexão entre as vias. Também, trocas de faixa devem ser executadas para obedecer regras de trânsito. Esses três planejadores de caminho usam clotóides, arcos de circunferência e retas como curvas interpoladoras, cuja curvatura é restrita a valores que o veículo é capaz de executar: o planejador de caminho em cruzamentos usa apenas um mínimo de velocidade de rotação do volante do veículo para executar a manobra, melhorando o nível de conforto; o planejador de caminho em rotatórias requer as coordenadas do centro e o raio da rotatória, bem como parâmetros que definem as manobras na entrada e na saída da rotatória para calcular o caminho; o planejador de caminho para troca de faixa conecta pistas pertencentes à mesma via com uma distância longitudinal do caminho previamente determinada. Ao final, um caminho com curvatura globalmente contínua é gerado. Como resultado deste trabalho, um cenário urbano real é modelado e os métodos propostos são validados.
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Andersson, Sara, and IngaMaj Sedin. "Ett visuellt hjälpmedel vid trycksårsprevention : Continuous Bedside Pressure Mapping System (MAP-system)En randomiserad kontrollerad studie." Thesis, Uppsala universitet, Institutionen för folkhälso- och vårdvetenskap, 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-300858.
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SAMMANFATTNING Bakgrund: Trycksår är en lokal skada i huden och i underliggande vävnad som kan uppkomma i samband med sjukdom, vård och behandling. Trycksår betraktas idag som en vårdskada och ska anmälas som en avvikelse. För individen innebär det stort lidande och ger höga kostnader för samhället, större omvårdnadsbehov och förlängda vårdtider. Studier visar att kunskap om trycksårsprevention hos sjuksköterskor och undersköterskor i Sverige inte är tillräckligt hög. Ett trycksensorsystem (MAP-system) finns nu tillgängligt som ger omedelbar feedback av patientens tryckpunkter som ett hjälpmedel vid trycksårsprevention. Syfte: Att utvärdera effekten av MAP- systemet avseende förekomst av trycksår hos äldre patienter under vårdtiden på en geriatrisk avdelning på sjukhus. Metod: En randomiserad, kontrollerad studiedesign valdes. En geriatrisk vårdavdelning valdes ut med en MAP-grupp (n=91) och en kontrollgrupp (n=99). Ett studieprotokoll användes med uppgifter om: demografisk data, hudinspektion (trycksårsklassificering kategori 1-4), Modifierad Nortonbedömning, komfort, maxtryck samt preventiva åtgärder. Insamlad data behandlades i SPSS och signifikansberäkning, standardavvikelse och medeltal räknades ut. Resultat: Användande av MAP-systemet gav ingen signifikant skillnad i andelen patienter med trycksår mellan MAP- och kontrollgruppen. Andel patienter med trycksår i MAP-gruppen dag ett var 24,2 % och dag 14, 28,2 %. I kontrollgruppen var andelen dag ett 18,2 % och dag 14, 23,8 %. Vanligaste lokalisationen av trycksår var hälar därefter sakrum och glutealt. Patienter med trycksår fick signifikant fler trycksårsförebyggande åtgärder. Slutsats: Studien visar ingen signifikant skillnad mellan andelen patienter med trycksår i MAP- och kontrollgruppen. Preventiva åtgärder prioriterades främst till patienter med trycksår. Genomförandet av studien antas ha medfört ökat fokus på trycksårsprevention samt påverkat prevalensen av trycksår positivt på den aktuella avdelningen.ABSTRACT Background: Pressure ulcers consist of local damage to the skin and underlying tissue and can occur in relation to illness, care and treatment. Pressure ulcers are today considered as an adverse event and are to be reported as a deviation from care routines. For the individual it can be the source of great suffering. It also generates large costs for the community, increased needs of nursing as well as prolonged periods of hospitalization. Studies show that the level of knowledge among registered nurses and assistant nurses in Sweden is insufficient. A pressure mapping system (MAP system) is now available, and can provide immediate feedback about the patient´s pressure points as a tool for pressure ulcer prevention. Aim: To study the effect of the MAP system regarding the presence of pressure ulcers in elderly hospitalized patients on a geriatric ward. Method: A randomized, controlled study design was chosen. A geriatric ward was selected with a MAP group (n=91) and a control group (n=99). A study protocol containing demographic data, systematic skin inspection (with classification of pressure ulcers category 1-4), Modified Norton scale, comfort, maximum pressure and preventive measures was used. Data was processed in SPSS; generating mean, standard deviation and level of significance. Results: No significant difference in the prevalence of pressure ulcers was shown between the MAP- group and the control group. The prevalence of pressure ulcers in the MAP-group was 24,2 % on day one and 28,2 % on day 14. In the control group the corresponding numbers were 18,2 % and 23,8 %. The most common localization of pressure ulcers were heels, followed by the sacral and gluteal regions. Patients with pressure ulcers received significantly more preventive measure compared to patients without pressure ulcers. Conclusion: The study shows no significant differences between the groups regarding the prevalence of patients with pressure ulcers. Preventive measures were prioritized mostly for patients with existing pressure ulcers. The study is assumed to have increased the focus on pressure ulcer prevention thus affecting the prevalence of pressure ulcers in a positive way on the present ward.
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Alipour, Bertilsson Elham. "Process mapping, first step towards business excellence : A case study at Golvet Göteborg." Thesis, Högskolan i Borås, Akademin för textil, teknik och ekonomi, 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:hb:diva-22108.
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Continuous improvement of processes is one important aspect of quality management and the way towards excellence. Companies are at different stages of business excellence, but the way is long, and the improvement process is never ending. For a company to start its journey towards business excellence, there are many means, guidelines and models to use but no single way that guarantees the success and no generic mean that can be extended to all types of companies. That’s why this paper tries to initiate process improvement journey at Golvet Göteborg by applying excellence models for process optimization and making a process map of warehousing to recognize improvement areas and act upon that. To do this, a literature review in areas of quality management and business excellence is conducted with focus on process management. By interviewing key persons at the company, a map of warehouse process is illustrated and based on that possible improvements are suggested to leadership.
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Messier, Alexis. "Introducing Continuous Improvement in an R&D Facility : Action research in the pharmaceutical industry." Thesis, Linköpings universitet, Kvalitetsteknik, 2014. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-110882.
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Continuous Improvement processes are commonly used by many organizations facing competitive pressure. By implementing continuous incremental changes, it allows optimizing resources while maintaining flexibility. However, it requires significant resources and involvement from all levels of management, as well as field workers. Continuous Improvement is based on the study of processes and the identification of recurrent problems; therefore it is particularly adapted to manufacturing activities and other repetitive processes. R&D (Research and Development) activities are less repetitive and tend to be iterative, which make them more difficult to study. Yet these activities represent a strong competitive asset and an early mistake or misunderstanding might have a significant cost. The objective of this project was to study the deployment of Continuous Improvement for R&D processes through a literature review and a case study in the pharmaceutical industry. Action research has been the research method that has been employed; the particularity of this method is that the researcher participates actively to the studied change. It resulted in the identification of some characteristics that have to be taken into account in the deployment of improvement activities. First the culture is based on problem-solving, which increase the efficiency of data study and analytical method whilst formalization tools are less efficient, as well as performance indicators related to improvement activities. Besides, the need of customers (both internal and external) is difficult to define and is subject to evolution; this issue tends to be aggravated by a lack of communication. Moreover, development projects being unique and highly iterative, it is recommended to study processes at a more conceptual level, although no specific mapping tool seems particularly adapted. Finally, beside the study of general processes, the study of each individual project (project reviews) allows individual and collective learning. This project also propose a tool allowing the study of information flows between activities and teams in order to reduce mismatch between need and reality (and thus communication issues). This tool relies on the use of local SIPOC diagrams to represent activities and the mapping of flows between each of them.
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Emmenegger, Leonidas Philip. "Kelvin Probe Electrode for Field Detection of Corrosion of Steel in Concrete." Scholar Commons, 2015. http://scholarcommons.usf.edu/etd/5944.
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While the Kelvin Probe (KP) has been used in a variety of surface scanning applications, the use of the KP in reinforced concrete structures to detect corrosion has been pioneered by previous work performed at the University of South Florida. However, in that work, the scale and construction of the probes was not suited to use in the field. This is primarily attributable to the small operating disk-to-concrete gap which would make the probe unable to accommodate road conditions, such as irregularities in the grading of the road, and local pitting of the surface. Therefore, it was important to investigate whether the KP can be scaled up while still maintaining resolution and fidelity of the measurements taken. The new mobile KP prototype (MKPP) constructed in this work, has a sensing disk that is approximately 10 cm in diameter and is capable of operating up to 2 cm above the concrete surface. Testing consisted of mapping an instrumented test slab simulating a corroding concrete bridge deck, at a rate of travel of about 0.6 mph (~1 ft/s) over the slab surface. The potential map generated through use of the MKPP successfully identified the corroding spot, the location of which was verified using the traditional half-cell potential mapping method outlined in ASTM C 876-09. The MKPP mapping in these trials was approximately 10 times faster than when using the traditional method. The faster potential mapping by the MKPP, while still identifying corroding sites, should allow for more economical and less intrusive survey of the condition of bridge decks. The work set the necessary proof of concept for future demonstration of an array of such probes which would further magnify the beneficial effect.
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Kazemeini, Sayed Hesammoddin. "Seismic Investigations at the Ketzin CO2 Injection Site, Germany: Applications to Subsurface Feature Mapping and CO2 Seismic Response Modeling." Doctoral thesis, Uppsala universitet, Geofysik, 2009. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-105032.
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3D seismic data are widely used for many different purposes. Despite different objectives, a common goal in almost all 3D seismic programs is to attain better understanding of the subsurface features. In gas injection projects, which are mainly for Enhanced Oil Recovery (EOR) and recently for environmental purposes, seismic data have an important role in the gas monitoring phase. This thesis deals with a 3D seismic investigation at the CO2 injection site at Ketzin, Germany. I focus on two critical aspects of the project: the internal architecture of the heterogeneous Stuttgart reservoir and the detectability of the CO2 response from surface seismic data. Conventional seismic methods are not able to conclusively map the internal reservoir architecture due to their limited seismic resolution. In order to overcome this limitation, I use the Continuous Wavelet Transform (CWT) decomposition technique, which provides frequency spectra with high temporal resolution without the disadvantages of the windowing process associated with the other techniques. Results from applying this technique reveal more of the details of sand bodies within the Stuttgart Formation. The CWT technique also helps to detect and map remnant gas on the top of the structure. In addition to this method, I also show that the pre-stack spectral blueing method, which is presented for the first time in this research, has an ability to enhance seismic resolution with fewer artifacts in comparison with the post-stack spectral blueing method. The second objective of this research is to evaluate the CO2 response on surface seismic data as a feasibility study for CO2 monitoring. I build a rock physics model to estimate changes in elastic properties and seismic velocities caused by injected CO2. Based on this model, I study the seismic responses for different CO2 injection geometries and saturations using one dimensional (1D) elastic modeling and two dimensional (2D) acoustic finite-difference modeling. Results show that, in spite of random and coherent noises and reservoir heterogeneity, the CO2 seismic response should be strong enough to be detectable on surface seismic data. I use a similarity-based image registration method to isolate amplitude changes due to the reservoir from amplitude changes caused by time shifts below the reservoir. In support of seismic monitoring using surface seismic data, I also show that acoustic impedance versus Poisson’s ratio cross-plot is a suitable attribute for distinguishing gas-bearing sands from brine-bearing sands.CO2SINK Project
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Noris, Leosdan Figueredo. "Técnica de escaneamento contínuo com Ruído Magnético de Barkhausen para chapas aços carbono." Universidade de São Paulo, 2017. http://www.teses.usp.br/teses/disponiveis/3/3152/tde-03082017-103928/.
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Este trabalho estuda a aplicação de um Ensaio Não-Destrutivo de Inspeção (ENDI), baseado na técnica Ruído Magnético de Barkhausen (RMB), na detecção de regiões não homogêneas em chapas de aços carbono. Apresentando os avanços no desenvolvimento de uma nova variante de ensaio não-destrutivo magnético, denominada Escaneamento Contínuo de Ruído Magnético de Barkhausen (ECRMB). O RMB é gerado por abruptas mudanças na magnetização de materiais magnéticos quando são submetidos a campos magnéticos variáveis. Essas mudanças são afetadas pela micro-estrutura e a presença e distribuição de tensões elásticas (compressão e tração), deformação plástica e alteração da micro-estrutura. Neste trabalho analisou-se a sensibilidade dos sinais de RMB na detecção de deformações plásticas em parâmetros tais como, frequência de campo magnético de excitação e a velocidade de movimentação da sonda. O comportamento do parâmetro RMSRMB dos sinais de RMB se correlacionou com a posição das regiões não homogêneas detectadas nas amostras. Sendo, contudo ainda feita uma avaliação da técnica aplicada para a medição, fazendo uma comparação dos resultados obtidos com a técnica de Ruído Magnético de Barkhausen Estático (RMBE) que é uma técnica já estabelecida na literatura. Os resultados mostraram, que para cada um dos casos estudados, é possível detectar a posição do dano produzido. Essa nova técnica aumenta o espectro de soluções de ENDI para problemas não contemplados pelas técnicas existentes.This work the application of a technique of Non-Destructive Inspection Test (NDIT) based on the technical Magnetic Barkhausen Noise (MBN), the detection of non-homogeneous regions in sheets of carbon steels. It presents advances in the development of a new technique of magnetic non-destructive testing. Particularly a variant nominated Scanning Continuous Magnetic Barkhausen Noise (SCRMB). The MBN are generated by abrupt changes in the magnetization of materials when subjected to varying magnetic fields. These changes are affected by the microstructure and the presence and distribution of elastic stresses (compression and tension). We analyzed the sensitivity of the signal MBN detection plastic deformation on parameters such as magnetic field excitation frequency and the probe movement speed. The RMSMBN parameter behavior of MBN signals correlated with the position of non-homogeneous regions detected in the samples. An evaluation of the technique applied to the measurement was performed by making a comparison of the results obtained with MBNE technique, is a technique already established in the literature. The results showed that for each of the studied cases, it is possible to detect the position of the damage produced. This new technique increases the spectrum of NDIT solutions for problems not covered by existing techniques.
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Starkhagen, Christian. "Kvalitet och Processutveckling : -Av elektroniskt informationsutbyte (EDI)." Thesis, Linköpings universitet, Kvalitetsteknik, 2010. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-57278.
Full textAbstract:
Syftet med detta examensarbete är att undersöka möjligheterna för utökad kundnytta och kvalitetssäkra implementeringsprocessen av elektroniskt informationsutbyte (EDI). Detta uppnås med kvalitetsutveckling som grund, vilket omfattar processorientering. Rapporten inleds med en beskrivning av arbetets syfte och vilka problem som står till grund. Vidare introduceras företaget som uppdragsgivare och relevant teori tas upp, detta för att bilda en referensram inför de metoder som använts för att förbättra processen. Slutligen så presenteras resultaten och en diskussion hålls kring detta, med vidare rekommendationer för fortsatt utveckling. EDI processen har visualiserats dels med hjälp av akademiska litteraturer och dels från empiriskt material. Visualiseringen av processen har bildat en översikt av dess brister och problemområden (bland annat tidsfördelningen utmed processen och grunden till låg kvalitetsstandard), vilket har gett möjligheter till effektiva lösningsförslag för vidareutveckling. De främsta verktygen som har använts för visualiseringen är processkartläggning och värdeflödesanalys (VSM). I Rapporten presenteras dessutom ett avsnitt om ledningsstruktur för att underlätta processorientering och en allmän beskrivelse om själva EDI tekniken med avsikt att sprida kunskap. Examensarbetet bidrar med processkartor för EDI processen, lösningsförslag för identifierade problemområden och rekommendationer för fortsatt utveckling.The aim of this master’s thesis is to examine the possibilities of increased customer value and to ensure quality for the implementation process of Electronic Data Interchange (EDI). This will be achieved with quality development as a foundation, which consists of process orientation. The report will initially describe the purpose of the master’s thesis and what problems that are the reason behind it. Following is a short description of the company who has requested the job and necessary theories are presented, in order to build a foundation for the upcoming methods that have been used. Finally there will be a presentation of the results and a discussion will be held around the subject, with further recommendations for continued development. The EDI process has been visualized partly with the help of academic literature and partly trough empirical data. The visualization has established an overview of the process with its flaws and weaknesses (inter alia the distribution of time throughout the process and reasons for low quality), which enables suggestions for effective solutions. The foremost tools that has been used for this purpose is the process mapping and the Value Stream Mapping (VSM). The report also presents a segment about management structure in order to facilitate the process orientation and a general description about the EDI technology in order to distribute knowledge. The master’s thesis contributes with maps for the EDI process, suggested solutions for identified problems and recommendations for continued development.
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Datta, Nayan. "Applicazione delle tecniche di Total Productive Maintenance all'interno di un sistema di produzione." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2019.
Find full textAbstract:
La seguente tesi è stata sviluppata attraverso un percorso formativo di 6 mesi svolto presso l’azienda Berco S.p.a, Headquater del gruppo Berco Undercarriage nella sede dello stabilimento di Copparo (FE), un’azienda di grandi dimensioni, leader nel campo della produzione di componenti per carri cingolati.
Il progetto contenuto nell’elaborato ha lo scopo di aumentare la disponibilità, efficienza e tasso di qualità di una linea automatica di montaggio rulli.
La scelta di tale linea di assemblaggio, quale oggetto dell’attività, deriva dal fatto che fosse la linea più critica al mio arrivo in azienda, infatti presentava un valore iniziale di OEE (Overall Equipment Effectiveness) di 55%, che è un indicatore per stabilire l’efficienza di un impianto. Da tale valore possiamo vedere che l’impianto lavorava sfruttando solo la metà della sua capacità produttiva.
Analizzando la natura delle perdite della linea, tipicamente guasti, fermate maggiori di 10 minuti, e set-up si è deciso di introdurre i principi fondamentali del TPM (Total Productive Maintenance) attraverso l’introduzione della Manutenzione Autonoma oggetto della tesi e successivamente le tecniche di SMED (Single Minutes Exchange of Die).
Per la realizzazione di un’attività strutturata di Manutenzione Autonoma si è proceduto con l’analisi degli indici di efficienza della linea, in particolare valori di OEE e di disponibilità in modo da individuare le criticità tecniche delle macchine; successivamente sono stati identificati gli strumenti necessari a rendere operativa la manutenzione autonoma del reparto. Infine per addestrare e motivare il personale di linea direttamente coinvolto nel progetto sono stati realizzati dei corsi di formazione.
Al termine del lavoro è stata definita una procedura standard di implementazione della Manutenzione Autonoma già avviata nel reparto di Montaggio Rulli ed estendibile ai restanti reparti dello stabilimento.
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Bauwe, Anne, and Wilfried Grecksch. "Finite dimensional stochastic differential inclusions." Universitätsbibliothek Chemnitz, 2008. http://nbn-resolving.de/urn:nbn:de:bsz:ch1-200800515.
Full textAbstract:
This paper offers an existence result for finite dimensional stochastic differential
inclusions with maximal monotone drift and diffusion terms. Kravets studied only
set-valued drifts in [5], whereas Motyl [4] additionally observed set-valued diffusions
in an infinite dimensional context.
In the proof we make use of the Yosida approximation of maximal monotone operators
to achieve stochastic differential equations which are solvable by a theorem
of Krylov and Rozovskij [7]. The selection property is verified with certain properties
of the considered set-valued maps. Concerning Lipschitz continuous set-valued
diffusion terms, uniqueness holds. At last two examples for application are given.
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Moineau, Suzanne. "Mapping out the processing continuum in aphasia /." Diss., Connect to a 24 p. preview or request complete full text in PDF formate. Access restricted to UC campuses, 2006. http://wwwlib.umi.com/cr/ucsd/fullcit?p3208811.
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Büchner, Sarah. "A new continuum mapping procedure at HartRAO." Thesis, Rhodes University, 2012. http://hdl.handle.net/10962/d1007766.
Full textAbstract:
A basket weaving technique for making radio continuum maps has been developed at the Hartebeesthoek Radio Astronomy Observatory (HartRAO). This data reduction technique significantly reduces scanning effects by using independent maps scanned in orthogonal directions. The observation and data analysis procedures that were developed are presented. The technique was used to map the supernova remnant MSH 15-52 at frequencies of 5000 MHz and 8500 MHz. The flux spectral index for this supernova remnant was found to be 0.83 ± 0.02 in this frequency range. Two regions (A and B) of the Galactic plane were observed at 8500 MHz with a resolution of 6'. Region A covered the 5°x5° area 47.5°< k 52.5°, Ibl < 2.5°, and region B was the 4.2°x3° area 320.4°< I <334.6°, Ibl < 1.5°. Far infrared observations at 60 !lm were used in conjunction with the radio maps to separate the thermal and non-thermal components of the radio emission. The technique can be used to map the Galactic plane at 8500 MHz using dual polarisation once the receiver at HartRAO has been upgraded. This would fulfil a need for a medium resolution, high frequency survey of the southern Galactic plane.Adobe Acrobat Pro 9.4.6
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Grijalba, Freddy Armando Franco. "Desenvolvimento de Ensaio Não Destrutivo baseado no Ruído Magnético de Barkhausen para caracterização de tensões elásticas e deformações plásticas em aços." Universidade de São Paulo, 2010. http://www.teses.usp.br/teses/disponiveis/3/3151/tde-17082010-121508/.
Full textAbstract:
Neste trabalho se estuda a aplicação de um método de Ensaio Não Destrutivo, baseado no Ruído Magnético de Barkhausen (RMB), na medição de falhas superficiais em aços. O RMB é gerado por abruptas mudanças na magnetização de materiais quando submetidos a campos magnéticos variáveis. Essas mudanças são afetadas pela microestrutura e a presença e distribuição de tensões elásticas (compressão e tração). Inicialmente apresenta-se um estudo de medições de tensões produzidas por flexão, e perfis de dureza, via RMB. Analisa-se a influência de parâmetros de medição e analise dos sinais, na qualidade do diagnostico. Analisou-se a sensibilidade dos sinais de RMB na medição de tensão a parâmetros tais como direção de laminação da chapa, intensidade e frequência de campo magnético de excitação. Nos estudos da aplicação do RMB em medições de dureza, se usaram amostras de ensaio Jominy, com variação contínua de dureza. Utilizou-se dois tipos de materiais e foram feitas medidas de dureza HRC, RMB e análise metalográfica. O comportamento de diferentes parâmetros dos sinais de RMB se correlacionou com as medições de Dureza e as micrografias obtidas. As amplitudes do RMB mostraram ser inversamente proporcionais aos níveis de dureza. Também se apresenta uma nova tecnologia para inspeção de superfícies, baseado no conceito do Barkhausen Contínuo. São apresentadas análises de parâmetros de medição e de configuração de sonda, na inspeção sob três situações: presença de defeitos volumétricos, deformação plástica, e tensões mecânicas aplicadas. Estudou-se a influência de parâmetros como, amplitude do campo aplicado, velocidade de varredura, posicionamento e características do sensor, no nível de detecção do dano. Métodos de processamento de sinais específicos foram desenvolvidos. Os resultados mostraram, que para cada um dos casos estudados, é possível detectar a posição e nível do dano produzido. Essa nova tecnologia aumenta o espectro de soluções de Ensaios Não Destrutivos para problemas não contemplados pelos métodos existentes.This work studies the application of a non-destructive testing method, based on the Magnetic Barkhausen Noise (MBN). MBN is generated by abrupt changes in magnetization of ferromagnetic materials subjected to variable magnetic fields. These changes are affected by the presence and distribution of elastic stresses (compression and traction) in the material and by its microstructure. At first, the present study describes MBN measurements of stresses produced by bending and MBN measurements of hardness profiles, in steel samples. The influence of both, measurement parameters and signal analysis, in the quality of fault diagnosis is also analysed. In this context, regarding stress measurements, the MBN signal sensitivity to parameters like surface lamination direction, intensity and frequency of magnetic excitation field is studied. On the other hand, application of MBN to hardness measurements used Jominy essay samples presenting continuous hardness variation. In this case, samples of two different materials were employed and hardness measurements were obtained by HRC, MBN as well as by metallographic analysis techniques. Behaviour of different MBN signal parameters were correlated with obtained hardness measurements and micrography. MBN amplitudes were shown to be inversely proportional to hardness levels. Finally, the work describes a new surface inspection technology, based on the concept of Continuous Barkhausen. In this context, the study analyses probe configuration and measurement parameters, concerning inspection of surface fault from three different origins: volumetric, plastic deformation, applied mechanical stress. The influence of parameters like applied field amplitude, probe velocity, sensor position and characteristics, in detecting damage level was also evaluated. In particular, specific signal processing methods were developed. Results showed that, for each studied case, it is possible to detect damage position and level. This new technology increases the range of NDT essay solutions for problems not yet contemplated by existing methods.
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Fausnaugh, Michael Martin. "Reverberation Mapping of the Continuum Source in Active Galactic Nuclei." The Ohio State University, 2017. http://rave.ohiolink.edu/etdc/view?acc_num=osu1494244528720735.
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King, Oliver Gray. "The C-Band : continuum mapping and measuring the radio environment." Rhodes University, 2007. http://hdl.handle.net/10962/d1004744.
Full textAbstract:
Voice-enabled applications, applications that interact with a user via an audio channel, are used extensively today. Their use is growing as speech related technologies improve, as speech is one of the most natural methods of interaction. They can provide customer support as IVRs, can be used as an assistive technology, or can become an aural interface to the Internet. Given that the telephone is used extensively throughout the globe, the number of potential users of voice-enabled applications is very high. VoiceXML is a popular, open, high-level, standard means of creating voice-enabled applications which was designed to bring the benefits of web based development to services. While VoiceXML is an ideal language for creating these applications, VoiceXML gateways, the hardware and software responsible for interpreting VoiceXML applications and interfacing with the PSTN, are still expensive and so there is a need for a low-cost gateway. Asterisk, and open-source, TDM/VoIP telephony platform, can be used as a low-cost PSTN interface. This thesis investigates adding a VoiceXML service to Asterisk, creating a low-cost VoiceXML prototype gateway which is able to render voice-enabled applications. Following the Component-Based Software Engineering (CBSE) paradigm, the VoiceXML gateway is divided into a set of components which are sourced from the open-source community, and integrated to create the gateway. The browser requires a VoiceXML interpreter (OpenVXI), a Text-To-Speech engine (Festival) and a speech recognition engine (Sphinx 4). The integration of the components results in a low-cost, open-source VoiceXML gateway. System tests show that the integration of the components was successful, and that the system can handle concurrent calls. A fully compliant version of the gateway can be used in the real world to render voice-enabled applications at a low cost.
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Alfadhl, Seiam S. "Designing the management systems for offices." Thesis, Loughborough University, 2011. https://dspace.lboro.ac.uk/2134/8500.
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An initial review of literature concerned with commercial and industrial office design indicated the need to research and develop a method for the design of the management systems of offices with the purpose of improving the operational effectiveness and alignment to strategy. In particular the literature review indicated that the application of lean methods, in non-manufacturing areas is comparatively rare. A critical review of the literature identified that Value Stream Mapping has been used to map mechanistic task activities, however, a need was identified for a new generation of Value Stream Mapping to map mixed mechanistic and organic task activities. To complement the literature survey and discover if there were significant variables (e.g. task uncertainty, interdependence, task complexity, mechanistic / organic structures, risk, task analysability etc) influencing office design, pilot studies were carried out in a mechanistic and organic office. Several additional variables were identified. From the pilot studies combined with the literature review a conceptual model was formulated which provides guidelines for managers enabling them to design the management systems fully taking all the variables into account. The conceptual model was then tested using a multiple case study design of two small consulting type offices that exhibited mixed mechanistic and organic characteristics. This resulted in an improved version of the model which was then further validated. This validation based upon the opinions of office managers focused mainly on identifying the practical usefulness of the model from an industrial perspective. Following the validation a final form of the model has been proposed in this research. It remains for future researchers to fully test the model by applying it in a wider range of offices. This study makes an explicit contribution to the redesign of offices as well as the utilisation of Value Stream Mapping to the mechanistic and the organic task activities within commercial and industrial offices.
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Czeszak, Wanderlucy Angelica Alves Correa. "A construção dos saberes dos professores e as contribuições do mapeamento conceitual." Universidade de São Paulo, 2011. http://www.teses.usp.br/teses/disponiveis/48/48134/tde-28062011-091506/.
Full textAbstract:
A vivência nas escolas ilustra complexos desafios e peculiaridades da apropriação das novas tecnologias pelos professores, dos problemas de infraestrutura e de formação. Compreendê-los a partir deste cenário e identificar as variáveis responsáveis pela sua transformação é compromisso das escolas, dos professores e da pesquisa. Este trabalho investiga interpretações de professores do ensino fundamental da rede municipal sobre ensino, aprendizagem e avaliação. Descreve a situação de infraestrutura quanto ao uso dos recursos da web, o perfil de formação dos professores e identifica a compreensão que os mesmos têm sobre o fenômeno educativo. Nosso campo de atuação investigou 16 escolas municipais do litoral de Santa Catarina. Foram realizadas visitas, entrevistas, ofertas de cursos e preenchimento de formulários, levando-se em conta a localização geográfica, o espaço físico e as características dos professores quanto à sua formação e ao uso das tecnologias. Os mapas conceituais foram utilizados como estratégias para compreender os conhecimentos prévios dos professores. Eles revelaram-se como importante ferramenta de reflexão sobre suas próprias práticas pedagógicas, mostrando aspectos subliminares relacionados com a teoria e a prática em seu cotidiano escolar. O mapeamento conceitual também se mostrou eficaz para o entendimento das transformações da prática pedagógica na apropriação do uso das Tecnologias da Comunicação e de Informação (TIC) como apoio ao desempenho docente. Esta pesquisa inferiu que a construção dos saberes dos professores não pode depender exclusivamente da sua formação inicial. A possibilidade de reflexão sobre a própria prática torna-se campo fértil como diagnóstico para o aperfeiçoamento futuro das suas ações. Esta investigação contribuiu para a compreensão de que a efetividade de projetos com tecnologias requer a formação continuada do professor em serviço e espaços pedagógicos efetivos para intercâmbio das atividades e compartilhamento de estratégias, tais como os mapas conceituais, que possibilitam a compreensão e construção de uma didática como suporte e enriquecimentos das TIC nas ações pedagógicas.The experience in schools illustrates complex challenges and peculiarities of the appropriation of new technologies by teachers; problems of infrastructure and training. Understanding them from this scenario and identifying the variables responsible for their processing is the commitment of schools, teachers and research. This work investigates interpretations of elementary school teachers of the municipal school on teaching, learning and evaluation. It describes the infrastructure of web resource, the profile of training teachers and identifies the understanding that they have about educational phenomenon. Our field of action investigated 16 municipal schools of the coast of Santa Catarina. There were visits, interviews, course offerings and filling out forms, taking into account the geographical location, physical space and the characteristics of teachers regarding their training and the use of technologies. The conceptual maps were used as strategies to understand the prior knowledge of teachers. They proved how important tool of reflection on their own educational practices, showing subliminal aspects related to the theory and practice in their daily life at school. The conceptual mapping also proved effective for understanding the transformation of pedagogical practice in the use of Technologies of information and communication (ICT) as support for the teaching performance. This search inferred that the construction of the knowledge of teachers cannot rely solely on their initial formation. The possibility of reflection on the practice becomes fertile field as a diagnosis for the improvement of their educational future actions. This research contributed to the understanding that the effectiveness of projects with technologies requires the continued training of teacher in-service and effective pedagogic environment for exchange of activities and strategies sharing, such as the conceptual maps, to enable understanding and construction of a didactic as support and enrichment of ICT in educational actions.
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Byrne, Jesse William. "Multifractal Analysis of Parabolic Rational Maps." Thesis, University of North Texas, 1998. https://digital.library.unt.edu/ark:/67531/metadc278398/.
Full textAbstract:
The investigation of the multifractal spectrum of the equilibrium measure for
a parabolic rational map with a Lipschitz continuous potential, φ, which satisfies
sup φ < P(φ)
x∈J(T)
is conducted. More specifically, the multifractal spectrum or spectrum of singularities, f(α) is studied.
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Eriksson, Alexander. "Developing a product costing model using Process-Based Cost Modeling : A case study of early stage cost estimation in a multinational agricultural cooperative." Thesis, KTH, Industriell ekonomi och organisation (Inst.), 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-246009.
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Product costing can be used to estimate potential future costs and revenues associated with a product. In the development of new products early cost estimates can be used to support decision making regarding which products are worth pursuing, and which production processes that are the most profitable. For a firm to make precise early cost estimates both technical and financial expertise is needed; however, in practice there is generally a gap between technology and cost. Process-Based Cost Modeling (PBCM) is a model developed to address this gap and generate costing estimates of higher precision. The model is especially developed for process production technologies. Although promising, PBCM is under researched and its applicability in new contexts are yet to be explored. The purpose of this study was to explore the PBCM’s applicability in new context of process production. This was done through a case study at a multinational agricultural cooperative. The problematization presented by the Case Company was to make early cost estimation of the production process of a main product and its byproducts. Furthermore, the Case Company wanted to compare alternative production designs and use of different raw materials in the production process. To create a product costing model that fully captures the contextual depth of the problem both qualitative and quantitative data was gathered from internal documents, a series of interviews, and observation of one of the sub-processes. The findings of the study resulted in development of a batch costing model, a hybrid between continuous operations and order costing systems. The batch costing proved to be dynamic and allowed comparison of different production and raw material alternatives. Furthermore, the PBCM methodology that resulted in the batch costing model was evident to give a deeper contextual understanding of the relationship between cost and production technology. For the Case Company, the outcome of the study highlighted key areas needing further investigation and process design features that lower operational costs. The results also provide recommendations how to increase the precision of the product costing models when more data are available. Finally, the academic outcome of the thesis provides trajectory in the further research on PBCM and gives new perspective on the use of batch costing in continuous operations.Produktkalkylering kan användas för att uppskatta framtida kostnader och intäkter associerade med en produkt. Vid utveckling av nya produkter och produktionsprocess kan produktkalkylering således användas vid beslutsfattande i situationer där man ska välja vilka produkter som är värda att arbeta vidare med, och vid lönsamhetsberäkningar vid olika tillverkningsprocesser. För att företaget ska kunna göra precisa kostnadsuppskattningar behövs både teknisk och ekonomisk expertis. Detta överses dock ofta i praktiken, vilket leder till en klyfta mellan teknik och kostnad. Processbaserad kostnadsmodellering, eller Process-Based Cost Modeling (PBCM), är en metod som har tagits fram för att överkomma denna klyfta, framförallt inom processproduktion. Även om modellen är lovande så saknas forskning på området, därav behöver PBCM:s applicerbarhet prövas i nya kontexter. Syftet med denna studie var att undersöka PBCM:s applicerbarhet i en ny kontext inom processproduktion. Detta gjordes genom att genomföra en fallstudie på ett multinationellt lantbruksföretag som har verksamhet inom livsmedelproduktion. Fallföretags problematisering byggde på att de ville göra en tidig kostnadsbedömning på tillverkningsprocess som producerar en huvudprodukt och ett antal biprodukter. Tillverkningsprocessen är ännu inte utvecklad och företaget vill således jämföra produktionskostnader vid användning av olika råmaterial och tillverkningsalternativ. För att utveckla en lämplig produktkalkyl till företaget samlades både kvalitativa och kvantitativa data in genom interna dokument, en serie av intervjuer, samt genom observation av en av de underliggande tillverkningsprocesserna. Studien resulterade i en hybridkalkyl som använder sig av både process- och orderkalkylering. Hybridkalkylen visade sig lämplig både för företagets produktionsteknologi, men framförallt tillät jämförelse mellan olika tillverkningsalternativ. Metodiken hos PBCM visade sig även användbar för att förstå hur kostnaden påverkas av produktionsteknologin. För fallföretaget påvisade resultaten områden som behöver undersökas ytterligare. Det ges även rekommendationer hur hybridkalkylen kan finslipas när företaget har mer data tillgängligt. När det kommer till det akademiska bidraget, så ger rapporten riktning för fortsatta forskningen på PBCM och ger nya perspektiv på hur hybridkalkylering kan användas i processproduktion.
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Hedin, Andreas. "CRAMO : Continuously Rendered Aerial Maps with Open Data." Thesis, Linnéuniversitetet, Institutionen för datavetenskap och medieteknik (DM), 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:lnu:diva-85290.
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One issue with a lot of the free aerial satellite maps that exists is the actuality of the acquired images in terms of the acquisition date. A lot of times the images are a few years old and will not represent the current reality. This project will try and mitigate this by using free open data from the Copernicus directive supplied by the European Space Agency ESA and use that to create maps. By doing this the ability to have daily updated aerial satellite maps occurs and that could be really interesting for scientific and commercial purposes. To make this work an automated process was created that downloaded the images from Copernicus and processed them with GDAL to create the maps. The process deals with the issues of mosaicing, reprojection and unattended downloads amongst other things. In the results, there is a comparison between three different maps to give a comparison and an idea of how big of a map the process can handle in a reasonable time.
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Beane, Robbie Allen. "Inverse limits of permutation maps." Diss., Rolla, Mo. : Missouri University of Science and Technology, 2008. http://scholarsmine.mst.edu/thesis/pdf/Beane_09007dcc804f93c9.pdf.
Full textAbstract:
Thesis (Ph. D.)--Missouri University of Science and Technology, 2008.Vita. The entire thesis text is included in file. Title from title screen of thesis/dissertation PDF file (viewed May 9, 2008) Includes bibliographical references (p. 71-73).
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Guirado, Fernández Fernando. "Modelización y Asignación de Tareas para Aplicaciones Paralelas con Flujo Continuo de Datos de Entrada." Doctoral thesis, Universitat Autònoma de Barcelona, 2007. http://hdl.handle.net/10803/5767.
Full textAbstract:
Las aplicaciones paralelas que procesan flujos continuos de datos de entrada, denominadas como aplicaciones pipeline, son de gran interés para la comunidad científica. Los principales criterios de rendimiento en el proceso de su optimización son dos: (a) minimizar la latencia, de forma que se obtenga el resultado para un dato de entrada en el menor tiempo posible y (b) conseguir un ratio de datos procesados por unidad de tiempo predeterminado, valor denominado como productividad.La necesidad de procesar una flujo continuo de datos, añade un factor de iteratividad en la ejecución de las tareas, lo cual supone un incremento en la complejidad de su optimización respecto a las aplicaciones que solo procesan un dato de entrada.
El objetivo de este trabajo de tesis contribuye en aportar una solución en la optimización de las aplicaciones pipeline. El proceso de optimización está basado en la obtención de una productividad específica en la ejecución de la aplicación. Para realizarllo, se aborda el problema mediante dos estrategias: (a) cuando la aplicacione no tienen la capacidad de alcanzar la productividad requerida, se crea una nueva estructura para el grafo de tareas que lo permita y, (b) en la situación de que le requerimiento de productividad sí sea alcanzable, se definen estrategias de mapping que asignan las tareas a los procesadores asegurando la capacidad de obtener el rendimiento marcado como objetivo. La arquitectura de ejecución escogida en esta tesis está basada en la arquitectura de memoria distribuida, por ser ésta la más utilizada en la actualidad en el cómputo de altas prestaciones.
Con respecto a la definición del grafo de tareas, esta tesis desarrolla dos técnicas basadas en la paralelización/replicación de taeras y que minimizan la sobrecarga de las comunicaciones. Ambas técnicas localizan las tareas que actúan como cuello de botella en la obtención del requisito de productividad. Con el conocimiento de su funcionalidad y del tipo de flujo de datos a tratar aplican: (a) paralelismo de datos para disminuir el tiempo de cómputo individual de cada uno de los datos de entrada o (b) replicación de tareas para aumentar la capacidad de procesar, de forma concurrente, más datos del flujo de entrada.
En el proceso de mapping, en el que las tareas de la aplicación serán asignadas a los nodos de procesamiento de la arquitectura de ejecución, esta tesis propone dos heurísticas de mapping basadas en el concepto de etapa síncrona y con diferente complejidad. Estas heurísticas reciben el nombre de MPASS (Mapping of Pipeline Applications based on Synchronous Stages) y MPART (Mapping of Pipeline Applications based on Reduced Tree). Ambas heurísticas, poseen los mismos objetivos para la asignación: (a) obtener una productividad prefijada, minimizando el número de nodos de procesamiento o (b) minimizar la latencia, bajo un requisito de productividad a alcanzar y, de nuevo, minimizando el número de nodos de procesamiento.
La experimentación se ha realizado utilizando un conjunto de aplicaciones sintéticas que modelan el comportamiento de las aplicaciones pipeline y tres aplicaciones reales de diferentes ámbitos científicos: el compresor de vídeo MPEG2, IVUS (IntraVascular UltraSound), encargada de procesar imágenes medicas para definir la estructura arterial y BASIZ (Bright And Satured Images Zones), que detecta en una secuencia de imágenes, aquellas regiones que captan la atención del ojo humano. Los resultados obtenidos demuestran como las técnicas propuestas son capaces de alcanzar el redimiento marcado como objetivo, proponiendo la estructura más adecuada para el grafo de tareas y mediante el mapping apropiado para las aplicaicones pipeline.
Parallel applications that process an input data stream, called pipeline applications, are currently focussing the interest of scientific comunity. The main issues to deal with in the optimization process of these applications are the following two: (a) to minimize latency, allowing the execution of one data of the input stream in the smallest possible time and, (b) to achieve a specific ratio of data processed per time unit, named as throughput.
The necessity of processing an input data stream, adds a characteristic of iterativity in the execution of tasks that increases the complexity of the optimization of these applications compared with this for parallel applications that only process a single input data.
The aim of this thesis is to contribute with a solution in the optimization of the pipeline applications. The optimization process is based on the obtention of a specific throguhput for the application during the execution. To do this, we confront the problem with two kind of strategies: (a) when the pipeline application is not able to achieve the throughput requirement, we develop the definition of a new task graph structure that allows it and, (b) in the situation where the required throuhgput is achievable, we define task mapping strategies that assign tasks to processors ensuring the capacity of obtaining the performance objective. The execution architecture selected in this thesis is based on the distributed memory arquitecture, as can be the clusters of workstations, which in the present time are broadly used on high performance computing.
Related to the task graph definition issue, this thesis propose two new techniques based on task parallelization/replication and reduce the communications overhead. Both techniques find the bottleneck tasks that don't allow to reach the throughput requirement. With the knowledge of their functionality and the kind of input data stream they apply: (a) data parallelism to minimize the individual computation time of a single input data or, (b) task replication in order to increase the ability of the pipeline application to process concurrently a higher number of input data.
In the mapping process, where the tasks of the applications are assigned to the processors on the execution architecture, this thesis proposes two new mapping heuristics based in the synchronous stage concept, with different complexity. These heuristics are named as MPASS (Mapping of Pipeline Applications based on Synchronous Stages) and MPART (Mapping of Pipeline Applications based on Reduced Tree). Both mapping heuristics have the same objectives: (a) to obtain the throughput used as the requirement by minimizing the number of processors and, (b) to minimize the latency, under a throughput requirement to be achieved by minimizing the number of processors to be used too.
The experimentation process is carried out using a set of synthetic applications that model the behaviour of the pipeline applications, and with three real applications of different scientific fields: the video mpeg-2 compressor, IVUS (IntraVascular-UltraSound) that process medical images in order to determine the arterial structure and BASIZ (Bright and Satured Images Zones) that detects on a image sequence, the zones that capture the main interest of the human eye. The results show that the proposed techniques are able to reach the target performance, proposing the best suitable task graph structure and the appropriate task mapping for these pipeline applications.
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Pelà, Luca. "Continuum damage model for nonlinear analysis of masonry structures." Doctoral thesis, Universitat Politècnica de Catalunya, 2009. http://hdl.handle.net/10803/30327.
Full textAbstract:
The present work focuses on the formulation of a Continuum Damage Mechanics model for nonlinear analysis of masonry structural elements. The material is studied at the macro-level, i.e. it is modelled as a homogeneous orthotropic continuum.
The orthotropic behaviour is simulated by means of an original methodology, which is based on nonlinear damage constitutive laws and on the concept of mapped tensors from the anisotropic real space to the isotropic fictitious one. It is based on establishing a one-to-one mapping relationship between the behaviour of an anisotropic real material and that of an isotropic fictitious one. Therefore, the problem is solved in the isotropic fictitious space and the results are transported to the real field. The application of this idea to strain-based Continuum Damage Models is rather innovative.
The proposed theory is a generalization of classical theories and allows us to use the models and algorithms developed for isotropic materials. A first version of the model makes use of an isotropic scalar damage model. The adoption of such a simple constitutive model in the fictitious space, together with an appropriate definition of the mathematical transformation between the two spaces, provides a damage model for orthotropic materials able to reproduce the overall nonlinear behaviour, including stiffness degradation and strain-hardening/softening response.
The relationship between the two spaces is expressed in terms of a transformation tensor which contains all the information concerning the real orthotropy of the material. A major advantage of this working strategy lies in the possibility of adjusting an arbitrary isotropic criterion to the particular behaviour of the orthotropic material. Moreover, orthotropic elastic and inelastic behaviours can be modelled in such a way that totally different mechanical responses can be predicted along the material axes.
The aforementioned approach is then refined in order to account for different behaviours of masonry in tension and compression. The aim of studying a real material via an equivalent fictitious solid is achieved by means of the appropriate definitions of two transformation tensors related to tensile or compressive states, respectively. These important assumptions permit to consider two individual damage criteria, according to different failure mechanisms, i.e. cracking and crushing. The constitutive model adopted in the fictitious space makes use of two scalar variables, which monitor the local damage under tension and compression, respectively. Such a model, which is based on a stress tensor split into tensile and compressive contributions that allows the model to contemplate orthotropic induced damage, permits also to account for masonry unilateral effects. The orthotropic nature of the Tension-Compression Damage Model adopted in the fictitious space is demonstrated. This feature, both with the assumption of two distinct damage criteria for tension and compression, does not permit to term the fictitious space as “isotropic”. Therefore, the proposed formulation turns the original concept of “mapping the real space into an isotropic fictitious one” into the innovative and more general one of “mapping the real space into a favourable (or convenient) fictitious one”. Validation of the model is carried out by means of comparisons with experimental results on different types of orthotropic masonry.
The model is fully formulated for the 2-dimensional case. However, it can be easily extended to the 3-dimensional case. It provides high algorithmic efficiency, a feature of primary importance when analyses of even large scale masonry structures are carried out. To account for this requisite it adopts a strain-driven formalism consistent with standard displacement-based finite element codes. The implementation in finite element programs is straightforward.
Finally, a localized damage model for orthotropic materials is formulated. This is achieved by means of the implementation of a crack tracking algorithm, which forces the crack to develop along a single row of finite elements. Compared with the smeared cracking approach, such an approach shows a better capacity to predict realistic collapsing mechanisms. The resulting damage in the ultimate condition appears localized in individual cracks. Moreover, the results do not suffer from spurious mesh-size or mesh-bias dependence. The numerical tool is finally validated via a finite element analysis of an in-plane loaded masonry shear wall.
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Thompson, Scotty L. "Comparing Topological Spaces Using New Approaches to Cleavability." View abstract, 2009. http://gateway.proquest.com/openurl?url_ver=Z39.88-2004&res_dat=xri:pqdiss&rft_val_fmt=info:ofi/fmt:kev:mtx:dissertation&rft_dat=xri:pqdiss:3372574.
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Eriksson, Carl-Oscar, and Jesper Tornberg. "Värdeflödesanalys i ett råmaterialflöde : En fallstudie där icke-värdeskapande aktiviteter och dess orsaksfaktorer identifieras." Thesis, Tekniska Högskolan, Högskolan i Jönköping, JTH, Industriell organisation och produktion, 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:hj:diva-45945.
Full textAbstract:
Syfte – Studiens syfte är att utifrån en värdeflödesanalys kartlägga ett råmaterialflöde samt identifiera icke-värdeskapande aktiviteter och föreslå förbättringsförslag. För att besvara syftet har det brutits ned i tre följande frågeställningar: Vilka icke-värdeskapande aktiviteter kan identifieras i flödet? Vad finns det för argument till att åtgärda de upptäckta icke- värdeskapande aktiviteterna Hur kan de upptäckta icke-värdeskapande aktiviteterna åtgärdas för att höja effektiviteten? Metod - Den genomförda studien är en fallstudie vilken bygger på en induktiv ansats med kvantitativa inslag. Den använda metoden är av kvalitativ karaktär då studien grundar sig på intervjuer och tolkning utifrån observationer av den grundläggande datainsamlingen. Datainsamlingen har genomförts utifrån litteraturstudier, intervjuer, observationer och dokumentstudier. För att nå en hög trovärdighet har det vid utformning av intervjufrågor varit viktigt att dessa kunnat kopplats till uppfyllnad av syftet. Detta arbete gjordes för att minimera risken för systematiska fel. Resultat – Studiens resultat bygger på en kartläggning av ett flöde där en nulägesanalys genomfördes för att sedan genomföra en värdeflödesanalys. Utifrån värdeflödesanalysen framgick det att en brist i flödet var höga nivåer av slöserier. Det största identifierade slöseriet var bristande kvalité, främst orsakat av produktion av defekta produkter. Denna brist påverkar vidare stora delar av flödet. De åtgärdsförslag vilka läggs fram i studien är att via en förändring av kulturen på företaget, genomföra standarder och vidare jobba med ständiga förbättringar. Implikationer – Resultatet visar vikten av att arbeta med effektivisering av slöserier vilket i studiens fall leder till bristande kvalitet främst i form av produktion av defekta produkter. Studien har ett praktiskt bidrag till tillverkande företag, genom att ta till sig de presenterade åtgärdsförslagen kan det generera en bättre samsyn på kvalitet i verksamheten. Även ett teoretiskt bidrag ges i form av att ämnet ständigt är under utveckling och behöver ny uppdaterad data. Vidare forskning skulle kunna se över hur man rent tekniskt och psykologiskt implementerar en förändring likt denna. Begränsningar – Resultatet kan vara svårt att generalisera eftersom detta är en studie genomförd som en enfallsdesign. Vidare är det även komplext att undersöka och utveckla en studie vilken visar på hur kvalitet är kopplat till företagskultur.Purpose – The purpose with this study is to map a raw material value flow analysis and identify non-value-creating activities and propound suggestions for improvement. Method – The study is a case study based on an inductive approach with quantitative elements. The used methods is of a qualitative character since the study is based on interviews and interpretation based on observations of the basic data collection. The data collection has been done through literature studies, interviews, observations and document studies. In order to achieve high credibility, it has been important that the design of interview questions can be linked to fulfillment of the purpose. This work was done to minimize the risk of systematic errors. Findings – The study's results are based on a mapping of a flow where a current analysis was carried out to then later end in a value flow analysis. Based on the value flow analysis, it appeared that a shortage in the flow was high levels of waste. The largest identified waste was a lack of quality, mainly due to the production of defective products. This shortcoming also affects large parts of the flow. The measures proposed in the study are to implement standards through a change in the culture of the company, and to continue to work on continuous improvements. Implications – The result, which shows the importance of working with streamlining waste, which in this case leads to a lack of quality, mainly in the form of production of defective products. The study can be seen as a practical contribution to manufacturing companies, by embracing these proposals for action, it should generate a better consensus on the quality of the business. Also a theoretical contribution where further research could look at how to technically and psychologically implement a change like this. Limitations – It can be difficult to generalize the results as this is a study conducted as a one-case design. Furthermore, it is also complex to investigate and develop a study that shows how quality is linked to corporate culture.
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Santos, Neto Fausto Ferreira dos. "Implementação da manufatura enxuta em uma empresa do setor automotivo, aplicando de forma integrada suas principais ferramentas." [s.n.], 2006. http://repositorio.unicamp.br/jspui/handle/REPOSIP/264366.
Full textAbstract:
Orientador: Paulo Correa LimaDissertação (mestrado profissional) - Universidade Estadual de Campinas, Faculdade de Engenharia Mecanica
Made available in DSpace on 2018-08-10T02:07:53Z (GMT). No. of bitstreams: 1 SantosNeto_FaustoFerreirados_M.pdf: 2574451 bytes, checksum: e24cbfc7b809b1748a11da92aa5cca33 (MD5) Previous issue date: 2006
Resumo: Atualmente, numa economia globalizada, a sobrevivência das Empresas depende de suas habilidades e flexibilidades de inovar e efetuar melhorias continuas. Como resultado, as Empresas vem buscando incessantemente novas ferramentas de gerenciamento, que as direcionem para uma maior competitividade através da qualidade e produtividade. Este trabalho sugere um método para implementação de um Sistema de Manufatura Enxuta, numa empresa automobilística instalada no Brasil, que permita níveis mundiais de performance. Neste trabalho é feita uma revisão bibliográfica que engloba uma abordagem histórica do assunto e uma apresentação dos conceitos nos quais a Manufatura Enxuta está estruturado, além de ser apresentado um caso prático de implementação e abordagem gerencial, relatando seus estágios e os resultados obtidos. O que foi extremamente relevante é que esta implementação alcançou excelentes resultados, que foram obtidos sem investimentos em pessoal ou maquinários, mas apenas na no estudo e na implementação das ferramentas de manufatura enxuta Por fim, é feita uma análise relacionada a essa abordagem
Abstract: Nowadays, in the global economy, organizations survival depends on their capacity and flexibility to do continuous improvements, which take them to harder competitively through quality and productivity This work suggest a method for implementation, a Lean Manufacturing System, in an automobilist company installed in Brazil, that allow the company to reach a best industrial performance. This job is a bibliographic revision that inc1udes historic assumptions and presentation of concepts regarding lean manufacturing structure besides practice presentation and manager approach relating phases and results achieved. What was extremely relevant is that this implementation reached excellent results, which were obtained without investments in personal or machine, but only in the study or relocation of lay out and implementation of lean manufacturing tools. And the end it' s done related analyses of total approach
Mestrado
Planejamento e Gestão Estrategica da Manufatura
Mestre em Engenharia Mecânica
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Silva, Alessandra Ribeiro da. "Linearização de aplicações multilineares contínuas entre espaços de Banach e multi-ideais de composição." Universidade Federal de Uberlândia, 2010. https://repositorio.ufu.br/handle/123456789/16777.
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Coordenação de Aperfeiçoamento de Pessoal de Nível SuperiorThe rst aim of this dissertation is to construct the tensor product of nitely many linear spaces from elementary tensors and to show that this is the space through which multilinear mappings can be linearized. Next continuous multilinear mappings between Banach spaces are studied. The projective norm is introduced in the tensor product in order to perform the linearization of continuous multilinear mappings. The last chapter is devoted to the study of operator ideals and their generalization to the multilinear setting. The interplay between the theory of multi-ideals and the projective tensor product is established by the theory of composition multi-ideals.
O primeiro objetivo desta dissertação é construir o produto tensorial de um número finito de espaços vetoriais a partir dos tensores elementares e mostrar que e atraves desse espaco que aplicações multilineares podem ser linearizadas. Em seguida são estudadas as aplicações multilineares contnuas entre espacos de Banach. A norma projetiva e introduzida no produto tensorial para realizar a linearização das aplicações multilineares contnuas. No ultimo captulo os ideais de operadores lineares são estudados e generalizados para o contexto de ideais de aplicações multilineares. A conexão da teoria de multi-ideais com o produto tensorial projetivo e feita atraves dos multi-ideais de composição.
Mestre em Matemática
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Stewart, Calvin. "A Hybrid Constitutive Model For Creep, Fatigue, And Creep-Fatigue Damage." Doctoral diss., University of Central Florida, 2013. http://digital.library.ucf.edu/cdm/ref/collection/ETD/id/6023.
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In the combustion zone of industrial- and aero- gas turbines, thermomechanical fatigue (TMF) is the dominant damage mechanism. Thermomechanical fatigue is a coupling of independent creep, fatigue, and oxidation damage mechanisms that interact and accelerate microstructural degradation. A mixture of intergranular cracking due to creep, transgranular cracking due to fatigue, and surface embrittlement due to oxidation is often observed in gas turbine components removed from service. The current maintenance scheme for gas turbines is to remove components from service when any criteria (elongation, stress-rupture, crack length, etc.) exceed the designed maximum allowable. Experimental, theoretical, and numerical analyses are performed to determine the state of the component as it relates to each criterion (a time consuming process). While calculating these metrics individually has been successful in the past, a better approach would be to develop a unified mechanical modeling that incorporates the constitutive response, microstructural degradation, and rupture of the subject material via a damage variable used to predict the cumulative “damage state” within a component. This would allow for a priori predictions of microstructural degradation, crack propagation/arrest, and component-level lifing. In this study, a unified mechanical model for creep-fatigue (deformation, cracking, and rupture) is proposed. It is hypothesized that damage quantification techniques can be used to develop accurate creep, fatigue, and plastic/ductile cumulative- nonlinear- damage laws within the continuum damage mechanics principle. These damage laws when coupled with appropriate constitutive equations and a degrading stiffness tensor can be used to predict the mechanical state of a component. A series of monotonic, creep, fatigue, and tensile-hold creep-fatigue tests are obtained from literature for 304 stainless steel at 600°C (1112°F) in an air. Cumulative- nonlinear- creep, fatigue, and a coupled creep-fatigue damage laws are developed. The individual damage variables are incorporated as an internal state variable within a novel unified viscoplasticity constitutive model (zero yield surface) and degrading stiffness tensor. These equations are implemented as a custom material model within a custom FORTRAN one-dimensional finite element code. The radial return mapping technique is used with the updated stress vector solved by Newton-Raphson iteration. A consistent tangent stiffness matrix is derived based on the inelastic strain increment. All available experimental data is compared to finite element results to determine the ability of the unified mechanical model to predict deformation, damage evolution, crack growth, and rupture under a creep-fatigue environment.Ph.D.
Doctorate
Mechanical and Aerospace Engineering
Engineering and Computer Science
Mechanical Engineering
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Katona, Gregory. "Field Theoretic Lagrangian From Off-Shell Supermultiplet Gauge Quotients." Doctoral diss., University of Central Florida, 2013. http://digital.library.ucf.edu/cdm/ref/collection/ETD/id/5958.
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Recent efforts to classify off-shell representations of supersymmetry without a central charge have focused upon directed, supermultiplet graphs of hypercubic topology known as Adinkras. These encodings of Super Poincare algebras, depict every generator of a chosen supersymmetry as a node-pair transformtion between fermionic / bosonic component
fields. This research thesis is a culmination of investigating novel diagrammatic sums of gauge quotients by supersymmetric images of other Adinkras, and the correlated building of field theoretic worldline Lagrangians to accommodate both classical and quantum venues. We find Ref [40], that such gauge quotients do not yield other stand alone or ”proper” Adinkras as afore sighted, nor can they be decomposed into supermultiplet sums, but are rather a connected ”Adinkraic network”. Their iteration, analogous to Weyl's construction for producing all finite-dimensional unitary representations in Lie algebras, sets off chains of algebraic paradigms in discrete-graph and continuous-field variables, the links of which feature distinct, supersymmetric Lagrangian templates. Collectively, these Adiankraic series air new symbolic genera for equation to phase moments in Feynman path integrals. Guided in this light, we proceed by constructing Lagrangians actions for the N = 3 supermultiplet YI /(iDI X) for I = 1, 2, 3, where YI and X are standard, Salam-Strathdee superfields: YI fermionic and X bosonic. The system, bilinear in the component fields exhibits a total of thirteen free parameters, seven of which specify Zeeman-like coupling to external background (magnetic) fluxes. All but special subsets of this parameter space describe aperiodic oscillatory responses, some of which are found to be surprisingly controlled by the golden ratio, ? ? 1.61803, Ref [52]. It is further determined that these Lagrangians allow an N = 3 ? 4 supersymmetric extension to the Chiral-Chiral and Chiral-twisted-
Chiral multiplet, while a subset admits two inequivalent such extensions. In a natural progression, a continuum of observably and usefully inequivalent, finite-dimensional off-shell
representations of worldline N = 4 extended supersymmetry are explored, that are variate
from one another but in the value of a tuning parameter, Ref [53]. Their dynamics turns
out to be nontrivial already when restricting to just bilinear Lagrangians. In particular, we
find a 34-parameter family of bilinear Lagrangians that couple two differently tuned supermultiplets to each other and to external magnetic fluxes, where the explicit parameter dependence is unremovable by any field redefinition and is therefore observable. This offers the evaluation of X-phase sensitive, off-shell path integrals with promising correlations
to group product decompositions and to deriving source emergences of higher-order background flux-forms on 2-dimensional manifolds, the stacks of which comprise space-time volumes. Application to nonlinear sigma models would naturally follow, having potential use in M- and F- string theories.Ph.D.
Doctorate
Physics
Sciences
Physics
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Yeh, Chun-Fu, and 葉峻福. "Applications of Value Stream Mapping and Line Balancing to Improve Continuous Production Systems." Thesis, 2008. http://ndltd.ncl.edu.tw/handle/28335297965969545254.
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碩士逢甲大學
工業工程與系統管理學研究所
96
Lean Manufacturing is a technique to create value for an entreprise. Lean is not only a skill but also a way of thinking. The purpose of Lean Manufacturing is to advance customer satisfaction by reducing waste, yielding profit for the firm and creating value for customers. In this paper, value stream mapping and line balancing are utilized to study continuous production systems. We present a case study of a shoe factory that implemented value stream mapping, visual management, 5S and PDCA. Value stream mapping is an effective tool. We can use paper and pencils to observe a locale and draw the whole flow path to discover possible obstacles. Afterwards, we can reduce waste and non-value-adding activities. Nowadays, industry must adjust its behaviors and planning to face the coming challenges because in the costs of energy resources, materials and wages. Many Taiwan-based firms have set up factories overseas, mainly because overseas locations offer low wages overseas and sometimes even low material costs. Three important goals for most Taiwanese industrial companies are to reduce costs, to increase profits, and to achieve constant growth. The shoe industry has been considered a traditional industry for a long time. This paper provides a significant contribution to the operation of serial manufacturing systems with value stream mapping and line balancing. Keywords: Lean Manufacturing, Value Stream Mapping, Line balancing, Shoe Industry
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Yeh, Chao-Chi, and 葉釗齊. "Continuous RGB Camera Image Feature Point Database and Multi-view Geometry Based Localization and Mapping." Thesis, 2015. http://ndltd.ncl.edu.tw/handle/74288232296117595613.
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碩士國立臺灣科技大學
機械工程系
103
Unmanned Vehicles have been widely used in fields such as emergency search and rescue, aerial terrain mapping, reconnaissance and patrol tasks, also industrial robots and domestic robots have started taking part in human daily activities, playing roles in assisting production and domestic tasks. When an unmanned vehicle enters a total alien environment, information of the surrounding and the position of the vehicle are nowhere to be obtained, performing localization and building model of the surrounding relying solely on sensors on board the vehicle to measure fixed feature points in the environment. Yet single image contains only 2-dimensional information, not sufficient enough to determine vehicle’s position and build a model of the environment. The purpose of this thesis is to perform localization and mapping based on a RGB camera and computer vision image processing techniques. First step is to define the origin of the world coordinate system, given enough feature points that contains sufficient scaling properties, through coordinate definition and properties of camera calibration, the initial position of the camera in the world coordinate system can be estimated, and the current image will be added to the image database. As the camera travels in the environment, the number of known feature points dropped below the necessary threshold for computation, by comparing the matching pairs of feature points in both the real-time image and history images and computing the Multi-view Geometry between these images we obtain coordinate information of the feature points existing in the environment, including estimated points into the computation, decomposing the projection matrix and camera’s extrinsic parameter we are able to estimate the position of the camera and update the image database. This thesis uses only single camera to downsize the system architecture, retaining flexibility for future applications, using continuous 2-dimensional images to obtain camera position ( assume the same as the vehicle’s position) and information describing the environment, reducing payload while remain accurate and efficient localization and mapping operation.
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Tadepalli, Srikanth. "Advances in empirical similitude method." 2009. http://hdl.handle.net/2152/6673.
Full textAbstract:
Dimensional Analysis is a technique that has allowed engineering evaluation
of complex objects by scaling analysis results of representative simpler
models. The original premise of the procedure stems from the idea of developing
non-dimensional parameters to relate physical events and underlying
analytical basis. Extending the process to incorporate non-linear and time
variant behavior has led to development of a novel process of similitude called
the Empirical Similitude Method (ESM) where experimental data of test specimen
is combined to produce the required prediction values.
Using the original motivation and hypothesis of ESM, this research has expanded the experimental similitude process by using adapted matrix
representations and continuous functional mapping of test results. This new
approach has provided more rigorous mathematical definitions for similarity
and prediction estimations based on an innovative error minimization algorithm.
Shape factors are also introduced and integrated into ESM to obtain
comprehensive evaluation of specimen choices.
A detailed overview is provided summarizing methods, principles and
laws of traditional similitude (TSM) and systems that satisfy extension into
ESM. Applicability of ESM in different systems is described based on the limitations
of TSM in the evaluation of complex structures. Several examples
and ideas spanning aerodynamic, thermal, mechanical and electro-magnetic
domains are illustrated to complement inherent technical analysis. For example,
the new ESM procedure is shown to be considerably more accurate than
earlier methods in predicting the values of drag coefficient of an airfoil. A final
foray into the regime of \design evaluation by similarity" is made to elucidate
applicability and efficiency of developed techniques in practical systems and
products. A thorough methodology is also presented highlighting pertinent
procedures and processes in usage of this method.text
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Choi, Yunsik. "Mapping continuous soil properties using fuzzy C-means (FCM) clustering on soil similarity vectors generated from solim." 2005. http://catalog.hathitrust.org/api/volumes/oclc/62501656.html.
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Thesis (M.S.)--University of Wisconsin--Madison, 2005.Typescript. eContent provider-neutral record in process. Description based on print version record. Includes bibliographical references (leaves 71-76).
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Vinha, Luís da. "Re-Mapping the Carter Doctrine: Geographic Mental Maps and Foreign Policy Change." Doctoral thesis, 2014. http://hdl.handle.net/10316/25381.
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Tese de doutoramento em Relações Internacionais, Política Internacional e Resolução de Conflitos, apresentada à Faculdade de Economia da Universidade de CoimbraThe US has always had an interest and been involved in the Middle East. However, it was the Carter Administration that ultimately gave the Middle East its pivotal role in US foreign policy. It was the Carter Doctrine, enunciated in 1980 which effectively coupled the security of the Persian Gulf region with American global security. The assertion of the Carter Doctrine has traditionally been viewed as a watershed transformation of the Carter Administration’s foreign policy. It allegedly signalled the end of détente and turn towards a more assertive military posture towards the Soviets and a more decisive US commitment to Middle Eastern security. It overturned many of the Administration’s prior foreign policy initiatives, such as nuclear non-proliferation, demilitarisation of strategic regions, curtailment of conventional arms transfers to Third World countries, and the promotion of human rights. In their place emerged a policy which emphasised a massive military build-up, increased military supply to Third World nations, and increased US global military presence. In particular, the Carter Doctrine represented a momentous shift in US geopolitical and geostrategic considerations by transforming the Middle East into a new critical defence zone. The Carter Doctrine has received widespread scholarly attention over the last three decades. Nevertheless, research has focused almost exclusively on explaining why the Carter Administration radically altered its foreign policy, particularly regarding the Middle East. Numerous accounts have emphasised the systemic and domestic forces underlying such change. Most conventional accounts tend to point out a series of crises arising midway throughout the Carter Presidency as responsible for the change in foreign policy. While there are many different theses regarding why the Carter Administration’s foreign policy changed, few endeavours have been made to explain how it changed. In fact, most accounts of the emergence of the Carter Doctrine do not provide a precise theoretical framework for understanding its origins and development. Accordingly, the current study argues in favour of three broad and provocative propositions. The first proposition claims that, while not explicitly acknowledging it as such, the majority of the accounts explaining the change in the Carter Administration’s foreign policy and the development of the Carter Doctrine use theoretical assumptions intrinsic to punctuated equilibrium and planned change models. The second proposition argues that the development of the Carter Administration’s Middle East policy and the emergence of the Carter Doctrine is best understood using an emergent change approach which highlights the continuous and cumulative policy adaptations and adjustments that decision-makers enacted to try to deal with their perceived international environment since the beginning of the Carter Presidency. Therefore, the change in the Administration’s foreign policy resulted from the incessant dynamics involved in foreign policy decision-making. It was the product of intentionally planned endeavours, as well as of the unexpected opportunities and consequences ensuing from the continued interactions between decision-makers. Finally, it asserts that considering the well defined spatial nature of the Carter Doctrine, geographic mental maps provide the most appropriate conceptual framework for identifying and assessing the emergent dynamics of the Carter Administration’s foreign policy decision-making process. In light of this, it is posited that the Carter Doctrine resulted from the continuous reconstruction of the Carter Administration’s geographic mental maps. As international and domestic events compelled decision-makers to evaluate the political environment, the Administration’s problem representation of the Middle East was in constant flux. Accordingly, while the Middle East was initially viewed optimistically as a place of cooperation and reconciliation, the continuously changing nature of the Administration’s mental maps ultimately mapped a region fraught with danger and conflict.
Os EUA sempre estiveram envolvidos no Médio Oriente, contudo foi a Administração Carter que atribuiu um papel crucial ao Médio Oriente na política externa Americana. A Doutrina Carter, anunciada em 1980, efetivamente agregou a segurança do Golfo Pérsico à segurança dos EUA. A afirmação da respetiva Doutrina tem tradicionalmente sido encarada como uma transformação histórica da política externa da Administração Carter. Alegadamente marcou o fim do desanuviamento e um compromisso Americano definitivo com a segurança do Médio Oriente. Alterou muitas das iniciativas iniciais da Administração tal como a não-proliferação nuclear, a desmilitarização de regiões estratégicas, a redução da transferência de armas convencionais para o Terceiro Mundo e a promoção dos direitos humanos. No seu lugar a Administração Carter instituiu uma política que favorecia o rearmamento massivo, o acréscimo de apoio militar ao Terceiro Mundo e o aumento da presença global das forças armadas Americanas. Acima de tudo, a Doutrina Carter representou uma alteração monumental das considerações geopolíticas e geoestratégicas dos EUA ao transformar a região do Medio Oriente numa nova zona de defesa crítica. A Doutrina Carter tem sido alvo de um amplo debate académico ao longo das últimas décadas. Todavia, os estudos têm-se centrado essencialmente em explicar porque é que a Administração Carter alterou radicalmente a sua política externa, particularmente em relação ao Médio Oriente. Vários estudos realçaram os fatores sistémicos e domésticos catalisando a mudança. A maioria das explicações tradicionais aponta um conjunto de crises que surgiram a meio da presidência como sendo responsáveis pela mudança. Embora haja muitas versões que explicam o porquê da mudança na política externa da Administração Carter, poucos esforços têm sido dedicados a explicar como é que a política se alterou. De facto, a maior parte dos estudos sobre o surgimento da Doutrina Carter não oferece um enquadramento teórico adequado para compreender o seu começo e desenvolvimento. Por conseguinte, o presente estudo apresenta três proposições amplas e provocadoras. A primeira afirma que, embora nem sempre explicitamente assumido, a maioria das explicações da transformação da política externa da Administração Carter e do surgimento da Doutrina Carter utilizam pressupostos teóricos inerentes aos modelos de equilíbrio pontuado e mudança planeada. A segunda preposição argumenta que o desenvolvimento da política para o Médio Oriente durante a Administração Carter e o desenvolvimento da Doutrina Carter deve ser compreendido através de uma abordagem de mudança emergente na qual se foca nas adaptações e nos ajustamentos políticos contínuos que os decisores políticos promoveram para tentar lidar com a sua perceção do ambiente internacional desde o início da presidência Carter. Desta forma, a transformação da política externa da Administração Carter resultou da dinâmica constante inerente ao processo de decisão política. Resultou tanto de iniciativas planeadas, bem como das oportunidades inesperadas e consequências resultantes das interações contínuas entre os decisores políticos. Finalmente, o estudo argumenta que devido à natureza nitidamente espacial da Doutrina Carter, os mapas mentais geográficos fornecem o enquadramento conceptual mais apropriado para identificar e aferir as dinâmicas emergentes no processo de decisão de política externa na Administração Carter. Neste sentido, alega-se que a Doutrina Carter foi o resultado de reconstruções contínuas dos mapas mentais geográficos da Administração Carter. Conforme os eventos internacionais e domésticos obrigavam os decisores a avaliar o ambiente político, a definição da situação no Médio Oriente percecionada pela Administração estava em constante transformação. Desta forma, embora o Médio Oriente fosse inicialmente encarado com otimismo e como sendo um lugar de cooperação e reconciliação, a natureza dinâmica dos mapas mentais da Administração acabou por revelar uma região repleta de riscos e conflitos.
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Gomes, Beatriz Coelho de Sá da Silva. "Mapeamento de processos de cobrança de portagens : caso de estudo : Ascendi." Master's thesis, 2016. http://hdl.handle.net/10400.14/22812.
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Num ambiente de contingência, a sustentabilidade de uma organização prevalece sobre qualquer outra prioridade, no sentido de ampliar a sua eficiência através da otimização de recursos e processos. Tal como Einstein mencionava, o importante é não parar de questionar, chave essencial para a construção e manutenção de um projeto focado nos processos.
O presente relatório pretende disponibilizar uma análise detalhada do projeto de Mapeamento dos Processos da Direção de Portagens da Ascendi. O estágio foi integrado no serviço de Tecnologias, Processos e Gestão de Portagens, e teve como objetivo o levantamento, avaliação e implementação de melhorias nos procedimentos, com base no conceito Business Process Management (BPM).
O trabalho realizado e descrito consistiu no diagnóstico, levantamento in loco, e consequente desenho das tarefas, elaboração da documentação de suporte e atualização do Mapa de Procedimentos, pelo que contribuíram para maximizar a performance da direção e uniformizar o desempenho das práticas organizacionais, que ganharam visibilidade ao serem validadas pela Comissão Executiva e publicadas no Manual de Procedimentos da empresa. No entanto, a implementação deste projeto enfrentou algumas barreiras, como a resistência à mudança por parte dos colaboradores, sugerindo-se o reforço e suporte da gestão de topo.
O estágio e a elaboração deste relatório provaram ser uma experiência muito enriquecedora, pois para além dos conhecimentos teóricos adquiridos, possibilitou implementá-los e partilhar as vantagens da aplicação de uma gestão orientada por processos, através da criação de ações de melhoria contínua.In a contingency environment, sustainability of an organization takes precedence over any other priority, in order to increase its efficiency by optimizing resources and processes. As Einstein mentioned, the important thing is not stop questioning, essential key to build and maintain a project focused on processes. This report aims to provide a detailed analysis of the Process Mapping Project of the Tolls Direction from Ascendi. The internship has been involved in the Technology, Processes and Toll Management service, and focused on the survey, evaluation and implementation of the improvement procedures, based on the Business Process Management (BPM) concept. The performed and descripted work consisted in the diagnosis, field interviews and consequent tasks design, preparation of supporting documentation and updating procedures map, which contribute to maximize the performance of management and standardize the organizational best practices, that gained visibility when they were validated by the Executive Committee and published in the company’s Procedures Manual. However, the implementation of this project faced some barriers, such as employees’ resistance to change, which suggests the enhancement and the support from the top management. This internship and this report proved to be a very enriching experience, because in addition to theoretical knowledge, it was possible to implement the processes, share the benefits of the process management, by keeping continuous improvement actions.
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Monteiro, Joana Sofia Adrião. "A perceção de profissionais envolvidos na implementação da metodologia de gestão lean : o caso de três hospitais portugueses." Master's thesis, 2017. http://hdl.handle.net/10362/30893.
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Resumo - Para fazer face ao aumento significativo dos custos com a prestação de cuidados em saúde têm surgido diversas metodologias de gestão ao longos dos tempos. Estas metodologias, para além de combaterem os custos tendem, cada vez mais, a eliminar o desperdício presente nas organizações de saúde gerando desta forma, mais valor para o paciente.
O presente trabalho incide no estudo da metodologia de gestão lean e na forma como a implementação da mesma é percecionada pelos profissionais envolvidos.
A metodologia utilizada no presente trabalho é o estudo de caso. No qual foram realizadas entrevistas semi-estruturadas em três hospitais portugueses e foi feita uma análise de documentos fornecidos pelas respetivas instituições, seguido de uma análise temática das informações recolhidas nas entrevistas.
Da informação recolhida nas entrevistas e na análise documental foi possível identificar os fatores de sucesso, as barreiras, os aspetos a reforçar e os principais resultados associados, de acordo com a perspetiva dos profissionais, à implementação da metodologia de gestão lean nos três hospitais portugueses.
As principais conclusões passam por fatores de sucesso como a adesão dos profissionais, a utilização de equipas multidisciplinares, o apoio da liderança de gestão e o go to gemba (ir ao terreno). Relativamente às barreiras foram apontadas barreiras tanto físicas como financeiras e uma grande resistência dos profissionais a novos métodos de trabalho. Em relação aos aspetos a reforçar é de salientar a falta de acesso à informação referente à metodologia de gestão lean bem como o envolvimento e a valorização dos profissionais envolvidos. Os principais resultados obtidos com a implementação da metodologia verificam-se ao nível da redução de custos, satisfação dos pacientes e dos profissionais de saúde e como consequência do sucesso destes resultados, a implementação desta metodologia foi expandida a outros serviços.Abstract - To face the significant increase of costs in the servisse rendered by the health care, various methodologies of management have emerged over the time. These methodologies, not only do they contend costs but also tend more and more to eliminate the actual wastefulness within Health Organisations, thus providing, in this way,more value for the patient. The present work here with studies the methodology of lean management and the way its implementation is perceived by the professional teams concerned. The methodology applied to this present work is the case study in which semi-structured interviews were carried out in three Portuguese hospitals followed by analyses of documents supplied by the institutions and by a categorical analysis of the information gathered in the interviews. From the information obtained in the interviews and from the documentary analysis it has been possible to identify the factors of success, the barriers, the aspects requiring improvement and the main results associated in accordance with the perspective of the professionals to the implementation of the methodology of lean management in the three Portuguese hospitals. The main conclusions pass by factors of success such as the agreement of the professionals, the utilisation of multi-disciplinary teams, the support of management leadership and the go to gemba. Regarding obstacles, physical and financial barriers were mentioned as well as a strong resistance from the professionals to new methods of work. Concerning the aspects requiring reinforcement, it is important to point out the lack of access to information referring to lean methodology as well as involvement and appreciation of the professionals. The principal results obtained by the implementation of the methodology are noticed at the level of cost reduction, satisfaction of patients and of the health professionals. Thanks to the success of the results, the implementation of this methodology has been extended to other services.
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Leite, Beatriz Viseu Carvalho de Pinto. "Actividades operacionais de customer service : sistemas, procedimentos e processos." Master's thesis, 2014. http://hdl.handle.net/10400.14/17117.
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A constante mudança e evolução dos mercados de produtos e serviços, dos processos tecnológicos e mesmo das necessidades dos clientes, obrigam a que as empresas adoptem um regime contínuo de actualização do desenho e gestão dos seus processos. A implementação de melhoria contínua dos processos é fundamental para o sucesso de uma empresa, pretendendo dar respostas e produzir efeitos, não apenas a um nível interno como também a um nível externo.
O presente Relatório de Estágio pretende fornecer uma análise detalhada e completa, a nível interno e externo, das actividades desempenhadas no Serviço de Apoio ao Cliente da Ascendi. O estágio foi integrado no Grupo de Trabalho Performance and Satisfaction Improvement Team, que tem como objectivo a implementação da filosofia de melhoria contínua nos processos desempenhados no Serviço de Apoio ao Cliente do Departamento de Direcção de Portagens da empresa.
A análise interna elaborada no estágio, definida como o Projecto de Mapeamento e Documentação dos Processos do Serviço de Apoio ao Cliente, consistiu no mapeamento de todas as actividades desempenhadas neste serviço bem como no levantamento da documentação associada ao desempenho das mesmas. O Projecto de Mapeamento obtido contribuiu para a criação de uma base sólida de análise operacional, possibilitando assim o desenho, análise e implementação de melhorias nos procedimentos desempenhados no Serviço de Apoio ao Cliente, bem como nos restantes serviços do Departamento Direcção de Portagens.
A análise externa desenvolvida no presente trabalho consistiu na elaboração de um Programa de Fidelização que resultou na definição de um conjunto de boas-práticas que a Ascendi poderá adoptar. A realização de um Programa de Fidelização constitui uma base para a definição de uma estratégia que se foque na criação de experiências únicas, memoráveis e valorizadas pelos seus clientes, fortalecendo assim as suas relações.
O estágio provou ser uma experiência enriquecedora, tanto numa vertente técnica como humana. Permitiu adquirir um conhecimento mais profundo e prático sobre os desafios e exigências sentidas, a nível operacional e relacional, no quotidiano de qualquer serviço.The constant evolution and change of today’s goods and services market characteristics, of the technological processes’ requirements, as well as, the growing complexity of the clients’ needs, forces companies to continually improve and adapt their services. The implementation of the continuous improvement philosophy is a key factor for a company’s success. This philosophy gives answers at both internal and external levels, for instance, in the mapping and optimization of a company’s internal processes and in creating better and more suitable Customer Service’s scripts. The present Internship Report aims to provide a detailed and complete analysis, at both internal and external levels, of Ascendi’s Customer Service processes and activities. The internship was allocated in the team Grupo de Trabalho Performance and Satisfaction Improvement, mainly due to this team’s primary goal and function: to introduce and apply the continuous improvement philosophy in all Ascendi’s activities performed by the Direcção de Portagens Department. Projecto de Mapeamento e Documentação dos Processos do Serviço de Apoio ao Cliente was the internal analysis developed during the internship, and the main focus of this thesis. This project consisted in the study and mapping of all the activities performed in Serviço de Apoio ao Cliente, along with the collection and codification of all supporting documents and programs used in such activities. Through Projecto de Mapeamento e Documentação dos Processos do Serviço de Apoio ao Cliente, it was possible to build a solid operational analysis basis, that allows the efficient mapping of all Ascendi’s activities, as well as, the identification of critical points and the development of future and improved versions of this company’s activities. Regarding the external analysis, it was developed the Programa de Fidelização project. In this project were defined some practices that Ascendi can implement in order to improve its image in the public-eye and create long, stable and loyal relations with its clients. The main output of this project was to create guidelines and suggestions that Ascendi can use in the creation of a long-term Customer Loyalty strategy. This internship has proved to be an enriching experience, both from a technical and human sides. It allowed the acquisition of a deeper and more practical knowledge, about the operational and relational challenges and requirements, felt by a company in the performance of its daily activities.
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Afonso, Pedro Gonçalves. "Análise e melhoria do fluxo de materiais na área produtiva de uma empresa com aplicações têxteis para a indústria automóvel utilizando ferramentas Lean." Master's thesis, 2018. http://hdl.handle.net/1822/58548.
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Dissertação de mestrado integrado em Engenharia e Gestão IndustrialO presente projeto de dissertação está inserido no âmbito da conclusão do 5º ano do Mestrado Integrado em Engenharia e Gestão Industrial (MIEGI) da Universidade do Minho. Este foi desenvolvido em ambiente empresarial na Continental – Indústria Têxtil do Ave, S.A. (C-ITA), uma empresa inserida no mercado da indústria automóvel que se destaca como um dos líderes mundiais no segmento de produção de tecido e cabo impregnado que são utlizado para reforço têxtil para pneus, como também de malhas para o interior de automóveis. O projeto de dissertação teve como principal objetivo a análise e melhoria do fluxo de materiais nas diferentes áreas produtivas da empresa através da utilização de ferramentas Lean. Para a realização deste projeto de dissertação foi utilizada a metodologia de investigação Action Research, onde este foi iniciado através de uma revisão bibliográfica dos conceitos principais de Lean Production e de logística. De seguida foi realizada uma análise critica às áreas produtivas onde este projeto incidiu, para a realização desta análise foram utilizadas várias ferramentas de diagnóstico como o Value Stream Mapping e o diagrama de Spaghetti, assim como métodos de análise ergonómica, como o método KIM e o método REBA, e de análise do ambiente térmico utilizando o método WBGT. Com esta análise foi possível identificar vários problemas nas diferentes áreas de estudo. Concluída a fase de análise ao sistema produtivo, foram elaboradas um conjunto de propostas de melhoria com o objetivo de resolver ou eliminar os problemas identificados. É de realçar que todas as melhorias implementadas surgiram através da colaboração ou sugestão dos operadores com o intuito de fomentar uma maior cultura de melhoria continua na empresa. A implementação das várias propostas de melhoria deu à empresa ganhos bastante positivos, tais como a criação através do VSM de um objetivo que a empresa pretenderá atingir num futuro próximo e a realização do primeiro passo para o atingir. Foi também conseguida uma eliminação de vários métodos de trabalho e operações que representavam vários riscos ergonómicos. Com este trabalho de dissertação foi possível alcançar um ganho de tempo de pré-embalagem (173%), um ganho de tempo de pré-embalamento e transporte até o monta-cargas com o novo método de trabalho na tecelagem (233%), um aumento de capacidade do buffer de rolos em verde das malhas (24%), um aumento de capacidade do armazém de rolos em verde da tecelagem (5%), uma melhoria no método e rota de transporte dos rolos das malhas que permite uma poupança/ano de 5105 euros e por fim, uma otimização dos métodos de manuseamento de produto semiacabado das malhas.
The present thesis project is inserted in the context of the conclusion of the 5th year of the MSC in Engineering and Industrial Management (MIEGI) in the University of Minho. It was developed in the business environment of Continental – Indústria Têxtil do Ave, S.A. (C-ITA), a company within the automotive industry market that stands as one of the world leaders in the segment of fabric production and impregnated cable that are used for textile reinforcement for tires, as well as meshes for the interior of the automobiles. The thesis project had as its main objective the analysis and improvement of the material flow in different productive areas of the company through the usage of Lean tools. For the realization of this dissertation project it was used a methodology of research, Action Research, where this was launched through a bibliographic review of the main concepts of Lean Production and Logistics. Then there was a critical analysis to the productive areas from which this dissertation was based, to carry out this analysis, several diagnosis tools were used, such as Value Stream Mapping and the Spaghetti diagram, as well as ergonomic analysis methods, such as the KIM and REBA method, and the analysis of the thermal environment using the WBGT method. With this analysis it was possible to identify several problems in different areas of study. Following the conclusion of the productive system analysis, were drawn up a set of improvement proposals in order to solve or eliminate identified issues. It should be stated that all the implemented improvements came from the collaboration or suggestion from the operatives with the purpose to foster a greater and continuous improvement culture in the company. The increment of numerous improvement proposals provided the company several positive outcomes and profits, such as the creation through the VSM of a company goal to be reached in a nearby future and the consummation of the first step to achieve it. The removal of a few work methods and operations that represented several ergonomic risks was also achieved. With this thesis project, the company reached a decrease in the greige packaging time (173%), time saved in the greige packaging and transport until the goods-lifts with the new weaving work method (233%), an increase in the storage capacity of the greige roll buffer of the meshes area (24%), an increase in the storage capacity of the greige roll warehouse of weaving (5%), an improvement in the transport route and method of the rolls of the meshes area that allows 5105 euros to be saved after a year, finally an optimization of the handling methods of the greige products in the meshes area was achieved.
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Chen, Sue-Er, and 陳淑娥. "Upper semi-continuous and lower semi-continuous point-to-set mappings." Thesis, 1996. http://ndltd.ncl.edu.tw/handle/09491551136850405163.
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Lopes, Bruno Manuel Novais. "Melhoria do desempenho dos processos nos departamentos de Purchasing, numa empresa multinacional do setor automóvel." Master's thesis, 2020. http://hdl.handle.net/1822/66589.
Full textAbstract:
Dissertação de mestrado integrado em Engenharia e Gestão IndustrialA presente dissertação foi desenvolvida no âmbito do Mestrado Integrado em Engenharia e Gestão Industrial da Universidade do Minho. O projeto de investigação foi concretizado em ambiente industrial, no período de nove meses, na empresa Bosch Car Multimédia Portugal S.A, sediada em Braga, com o objetivo de melhorar o desempenho dos processos realizados nos departamentos da secção de Compras. O processo que promove o planeamento da qualidade preventiva, desenvolvido internamente na Bosch, tem como objetivo assegurar que as exigências dos seus clientes são conhecidas e respeitadas desde o início do desenvolvimento de peças/produtos. O processo em questão exige coordenação de tarefas realizadas entre vários departamentos da secção de Purchasing da Bosch e com fornecedores externos. O tópico de investigação prende-se com o reduzido número de processos de aprovação de peças concluídos, antes de iniciar a produção interna do produto. A teoria que se corroborou é que tal problema se devia ao facto do procedimento para aprovação de peças, até então realizado, ser ineficaz e ineficiente. A metodologia de investigação que vigorou ao longo da dissertação foi a Action-Research. Neste seguimento, realizou-se, numa primeira fase, um diagnóstico à situação atual, com recurso a uma ferramenta standard Bosch (VSDiA: Value Stream Design for Indirect Areas), que auxilia o mapeamento das atividades realizadas em áreas indiretas e a outras ferramentas de modelação de processos, nomeadamente BPMN e RASIC. A posterior identificação de problemas e implementação de soluções, recorrendo a filosofias e ferramentas Lean, aplicadas a áreas indiretas (Lean Office), tais como a gestão visual, o Standard Work, a melhoria contínua ou Kaizen; e a pensamentos e métodos Bosch de melhoria contínua (CIP: Continuous Improvement Process), permitiu aumentar o desempenho do processo. Com a concretização do projeto de investigação, há que destacar como resultados principais: o aumento da eficácia, velocidade, qualidade e eficiência do processo em estudo e, consequente, aumento do número de processos de aprovação de peças concluído no prazo; o mapeamento objetivo, atual e coerente (aprovado por parte dos intervenientes) do processo de aprovação de peças; a implementação e adoção de ferramentas de melhoria contínua que visam a obtenção do processo ideal (também mapeado); a formação dos colaboradores para que haja continuidade do ciclo PDCA relativamente a todas as propostas de melhoria sugeridas; e, por fim, mas não menos importante dada a dificuldade deste tópico, o aumento da envolvência, cooperação e satisfação dos colaboradores da secção.
This dissertation was developed within the scope of the Integrated Master in Engineering and Industrial Management at the University of Minho. The research project was carried out in an industrial environment, in the period of nine months, at the company Bosch Car Multimedia Portugal S.A, based in Braga, with the objective of improving the performance of the processes carried out in the departments of the Purchasing section. The process that promotes preventive quality planning, developed internally at Bosch, aims to ensure that the requirements of its customers are known and respected since the beginning of the development of parts/products. The process in question requires the coordination of tasks carried out between various departments in the Purchasing section of Bosch and with external suppliers. The main research topic concerns the reduced number of completed parts approval processes, before starting the internal production of the product. The corroborated theory is that this problem was due to the fact that the procedure for approval of parts, until then carried out, was ineffective and inefficient. The research methodology used was Action-Research. Therefore, a diagnosis of the current situation was carried out, using a standard Bosch tool (VSDiA: Value Stream Design for Indirect Areas), which helps to map the activities carried out in indirect areas and other process modelling, namely BPMN and RASIC. The subsequent identification of problems and implementation of solutions, using Lean philosophies and tools, applied to indirect areas (Lean Office), such as visual management, Standard Work, continuous improvement or Kaizen; and Bosch thoughts and methods of continuous improvement (CIP: Continuous Improvement Process), allowed to increase the performance of the process. With the concretion of the research project, the following main results should be highlighted: increase in the effectiveness, speed, quality and efficiency of the process under study and, consequently, an increase in the number of parts approval processes completed on time; objective, current and coherent mapping (approved by the stakeholders) of the parts approval process; implementation and adoption of continuous improvement tools aimed at obtaining an ideal process (also mapped); training employees so that the PDCA cycle can continue with all suggested improvement proposals; and, last but not least, the increased involvement, cooperation and satisfaction of the employees of the section.
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Lazera, João Pedro Jarrais. "Análise e desenho de processos da Direção de Portagens na exploração e operação de portagens tradicionais : visão da operação segundo uma abordagem de processos." Master's thesis, 2015. http://hdl.handle.net/10400.14/20036.
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Este documento constitui o Relatório Final do estágio que teve como missão a
descrição e análise crítica do trabalho do projeto de mapeamento e análise de
processos da Direção de Portagens do Sistema de Cobrança de Portagens
Tradicionais. O objetivo do trabalho consiste em dar visibilidade dos processos
da Direção de Portagens analisados durante o estágio, que conduziu à criação
e/ou atualização da respetiva documentação, identificação e implementação de
melhorias e aplicação de novas medidas de controlo.
Realizou-se uma pesquisa bibliográfica acerca da gestão de processos de
negócio, implementação de uma visão orientada para os processos, gestão da
mudança e melhoria contínua. No trabalho prático foi realizado o levantamento
de procedimentos da Direção de Portagens seguindo uma metodologia baseada
em três fases: entender a situação atual; análise crítica e definição de
oportunidades de melhoria; e redesenhar e documentar os procedimentos de
modo a representar a sua forma futura. O resultado foi a atualização e criação de
documentação acerca dos procedimentos trabalhados, resultando numa
sistematização das atividades realizadas em cada processo da Direção de
Portagens, facilitando o reconhecimento de pontos críticos à operação e de
oportunidades de melhoria, assim como a definição de novos mecanismos de
controlo. Foi assim atualizado o Mapa de Procedimentos da Direção de Portagens
(MPDP) sobre os processos internos a esta direção, ferramenta essencial para a
política de melhoria contínua defendida pela organização e uma alavanca para a
implementação de uma gestão orientada para processos de negócio, com tudo o
que isso implica.The aim of this report is to survey, map and analyze processes related with the Exploration of Traditional Tolls. Its goal is to give visibility to the processes of Direção de Portagens, creating or updating documentation, identifying and implementing improvements and control measures. A bibliographical research was conducted, based on the existing literature about business process management, implementation of a process-oriented view, change management and continuous improvement. The methodology consists on: understanding the current situation, consulting the involved parts and existing documentation; analyzing critically and defining the improvement opportunities; and redesign the procedures and documentation in order to have its to-be form. The result was the update and creation of procedure related documents, leading to a greater visibility of the processes of Direção de Portagens, assisting in the recognition of improvement opportunities, as well as the definition and systematization of activities. A greater visibility to the internal processes of the organization was given with the survey and mapping of processes, making it a valuable tool for the continuous improvement policy of the firm, as well as a lever for the implementation of a business process oriented management, with everything it implies.
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Švarc, Radovan. "Slabé a slabé* homeomorfismy." Master's thesis, 2020. http://www.nusl.cz/ntk/nusl-434944.
Full textAbstract:
In this thesis we are studying some properties of weakly sequential homeomorphisms between Banach spaces. First, we show some results that summarize how are some clas- ses of Banach spaces (specifically separable spaces, spaces with separable dual, Asplund spaces, reflexive spaces, weakly compactly generated spaces and spaces not containing isomorphic copy of ℓ1) determined by weak topology of the space. Then we show that to preserve some properties (separability, reflexivity and being weakly compactly gene- rated) it is enough for the spaces to be weakly sequentially homeomorphic. Furthermore we show that if two spaces are weakly sequentially uniformly homeomorphic then one contains isomorphic copy of ℓ1 if and only if the other spaces has this property. Finally we construct weakly sequential homeomorphisms between some class of Banach spaces.