Dissertations / Theses on the topic 'Jams'
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Crawford, Sally. "Inside England's 'tap jams' : improvisation, identity, and community." Thesis, De Montfort University, 2014. http://hdl.handle.net/2086/10950.
Full textManners, Rebecca B. Doyle Martin W. "The structure and hydraulics of natural woody debris jams." Chapel Hill, N.C. : University of North Carolina at Chapel Hill, 2006. http://dc.lib.unc.edu/u?/etd,109.
Full textTitle from electronic title page (viewed Oct. 10, 2007). "... in partial fulfillment of the requirements for the degree of Master of Arts in the Department of Geography." Discipline: Geography; Department/School: Geography.
Harley, Craig Michael. "Denitrification Potential of Log Jams on the Sandusky River, Ohio :." Connect to this title online, 2005. http://hdl.handle.net/1811/305.
Full textTitle from first page of PDF file. Document formattted into pages: contains ii, 15 p.; also includes graphics. Includes bibliographical references (p. 15). Available online via Ohio State University's Knowledge Bank.
Saadé, Raafat G. "Modeling of surges caused by the release of breakup ice jams." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1995. http://www.collectionscanada.ca/obj/s4/f2/dsk3/ftp04/NQ43536.pdf.
Full textSuutarinen, Marjaana. "Effects of prefreezing treatments on the structure of strawberries and jams /." Espoo [Finland] : Technical Research Centre of Finland, 2002. http://www.vtt.fi/inf/pdf/publications/2002/P462.pdf.
Full textDeStefanis, Anthony Roland. "Trains, Trucks, and Traffic Jams: The Rise of Automotive Transportation, 1880-1956." W&M ScholarWorks, 1996. https://scholarworks.wm.edu/etd/1539626070.
Full textRibes, Llop Susana. "Study of different antifungal systems to preserve strawberry jams against fungi spoilage." Doctoral thesis, Universitat Politècnica de València, 2017. http://hdl.handle.net/10251/82306.
Full textLas nuevas tendencias en el desarrollo de envases alimentarios innovadores podrían afectar a la estabilidad microbiana del producto durante el almacenamiento. En este sentido, sistemas antifúngicos tales como emulsiones, nanoemulsiones y soportes mesoporosos de sílice pueden ser alternativas prometedoras para preservar la calidad del producto sin tener que aplicar otros tratamientos térmicos. La formulación de sistemas antifúngicos estables y la optimización de la metodología a emplear para preparar estos sistemas, tienen un papel importante en: i) su eficacia antifúngica; ii) pérdidas de los compuestos bioactivos producidas durante su preparación; y iii) su impacto en el perfil sensorial del producto alimenticio. Las nanoemulsiones preparadas con aceites esenciales presentaron por norma general un mayor efecto antifúngico que los aceites libres aplicados a las mismas concentraciones. Asimismo, el tipo de emulsionante utilizado desempeñó un papel clave en la actividad antifúngica de las nanoemulsiones. Las nanoemulsiones preparadas con proteína de suero de leche fueron más eficaces en la inhibición del crecimiento micelial y en la germinación de las esporas que las formuladas con Tween 80. La gran eficacia in vitro de las nanoemulsiones en el control del desarrollo de moho permitió evaluar su aplicación en productos alimenticios, siendo seleccionada la confitura de fresa como matriz alimenticia. Con este fin, las emulsiones de los aceites esenciales de clavo y de hoja de canela fueron incorporadas a las confituras de fresa con el fin de controlar el deterioro fúngico. A pesar de que estas emulsiones fueron capaces de reducir el deterioro fúngico de las confituras de fresa, su incorporación afectó negativamente al aroma, el sabor y la aceptación global de la confitura. En cuanto a la metodología empleada para preparar emulsiones aceite-agua, la combinación de agitación magnética y homogeneización por altas presiones fue la más eficaz para reducir las pérdidas de aceite esencial. Asimismo, se obtuvieron emulsiones estables con una alta capacidad antifúngica, determinada in vitro, frente a los hongos objeto de estudio. A pesar del prometedor uso de las emulsiones de aceite esencial de la corteza de canela en el control del deterioro fúngico de las confituras de fresa, su incorporación al alimento afectó negativamente al aroma, sabor y aceptación global del producto. Debido al gran impacto de los aceites esenciales en el perfil sensorial del producto alimenticio, se investigaron dos nuevos enfoques: i) combinaciones de diferentes compuestos antifúngicos en emulsiones; y ii) inmovilización de compuestos bioactivos sobre superficies de sílice mesoporosas. La combinación de aceite esencial de corteza de canela, el gluconato de zinc y el ácido trans-ferúlico permitió la obtención de un producto considerado microbiológicamente aceptable con buenas características organolépticas pero no se consiguió la inhibición total del crecimiento de moho. Por ello, se estudiaron las propiedades antifúngicas y sensoriales de agentes bioactivos (eugenol y timol) inmovilizados sobre superficies de sílice mesoporosas. La preparación de las confituras con eugenol inmovilizado en las micropartículas de MCM-41, mostró un mejor control de la inhibición fúngica en comparación con las muestras preparadas con timol funcionalizado. El análisis sensorial de las muestras tras la incorporación de los sólidos a la confitura de fresa, reveló que la inmovilización de eugenol y timol reduce el impacto sensorial de estos compuestos en confituras de fresa.
Les noves tendències en el desenvolupament d'envasos alimentaris innovadors podrien afectar l'estabilitat microbiana del producte durant l'emmagatzematge. En aquest sentit, sistemes antifúngics com les emulsions, nanoemulsions i suports mesoporosos de sílice poden ser alternatives prometedores per preservar la qualitat del producte sense haver d'aplicar altres tractaments tèrmics. La formulació de sistemes antifúngics estables, així com l'optimització de la metodologia a emprar per preparar aquests sistemes, tenen un paper important en: i) la seva eficàcia antifúngica; ii) pèrdues dels compostos bioactius produïdes durant la seva preparació; i iii) el seu impacte en el perfil sensorial del producte alimentari. Les nanoemulsions preparades amb olis essencials van presentar per norma general, un major efecte antifúngic que els olis lliures aplicats a les mateixes concentracions. Així mateix, el tipus d'emulsionant utilitzat va tenir un paper clau en l'activitat antifúngica de les nanoemulsions. Les nanoemulsions preparades amb proteïna de sèrum de llet van ser més efectives en la inhibició del creixement micelial i en la germinació de les espores que les formulades amb Tween 80. La gran eficàcia in vitro de les nanoemulsions en el control del desenvolupament de fongs va permetre avaluar la seva aplicació a productes alimentaris, sent seleccionada la confitura de maduixa com a matriu alimentària. Amb aquesta finalitat, les emulsions dels olis essencials de clau i de fulla de canyella van ser incorporades a les confitures de maduixa per tal de controlar el deteriorament fúngic. Tot i que aquestes emulsions reduïren el deteriorament fungic de les confitures de maduixa, la seva incorporació va afectar negativament a l'aroma, el sabor i l'acceptació global de la confitura. Pel que fa a la metodologia emprada per preparar emulsions oli-aigua, la combinació d'agitació magnètica i homogeneïtzació per altes pressions va ser la més eficaç per reduir les pèrdues d'oli essencial. A més, es van obtenir emulsions estables amb una alta capacitat antifúngica, determinada in vitro, davant dels fongs objecte d'estudi. Malgrat el prometedor ús de les emulsions d'oli essencial de l'escorça de canyella en el control del deteriori fúngic de les confitures de maduixa, la seva incorporació a l'aliment va afectar negativament a l'aroma, sabor i acceptació global del producte. A causa del gran impacte dels olis essencials en el perfil sensorial del producte alimentari, es van investigar dos nous enfocaments: i) combinacions de diferents compostos antifúngics en les emulsions; i ii) immobilització de compostos bioactius sobre superfícies de sílice mesoporoses. La combinació d'oli essencial d'escorça de canyella, el gluconat de zinc i l'àcid trans-ferúlic va permetre l'obtenció d'un producte considerat microbiològicament acceptable amb bones característiques organolèptiques però no es va aconseguir la inhibició total del creixement del fong. Per això, es van estudiar les propietats antifúngiques i sensorials d'agents bioactius (eugenol i timol) immobilitzats sobre superfícies de sílice mesoporoses. La preparació de les confitures amb eugenol immobilitzat en les micropartícules de MCM-41, va mostrar un millor control de la inhibició fúngica en comparació amb les mostres preparades amb timol funcionalitzat. L'anàlisi sensorial de les mostres després de la incorporació dels sòlids a la confitura de maduixa, va revelar que la immobilització de eugenol i timol redueix l'impacte sensorial d'aquests compostos en confitures de maduixa.
Ribes Llop, S. (2017). Study of different antifungal systems to preserve strawberry jams against fungi spoilage [Tesis doctoral no publicada]. Universitat Politècnica de València. https://doi.org/10.4995/Thesis/10251/82306
TESIS
Premiado
Tyminski, William P. "Preventing Bark-Caused Increment Borer Jams: A Modified Technique For Core Extraction." Tree-Ring Society, 2011. http://hdl.handle.net/10150/622644.
Full textDuffin, Jenna. "Effects of Engineered Log Jams on Channel Morphology, Middle Fork of the John Day River, Oregon." Thesis, University of Oregon, 2015. http://hdl.handle.net/1794/19338.
Full textRoberg-Orenstein, Penina. "The development and control of traffic jams caused by incidents in rectangular grid networks." Thesis, Middlesex University, 1997. http://eprints.mdx.ac.uk/6564/.
Full textRibeiro, Aline da Silva. "Modelagem chuva-vazão utilizando framework JAMS em área de afloramento do Sistema Aquífero Guarani." Universidade de São Paulo, 2012. http://www.teses.usp.br/teses/disponiveis/18/18138/tde-30082012-145636/.
Full textThe National System of Information Resources (SNIRH) has not monitored all Brazilian rivers. This lack of information reflects in the fault estimation of water availability for the multiple uses. In this context, the hydrological models stood out for trying to address this lack of data. However, it is noted that many models do not generate good results when performed outside of the study area where they were created. Therefore, due to flexibility in the choice of hydrological processes to be simulated, this study used the framework JAMS (Jena Adaptable Modelling System) in the construction of a specific rainfall-runoff model to the basin of the Ribeirão da Onça monitored watershed, which is embedded in an outcrop area of one of the most important aquifers in the world, the Guarani Aquifer System (SAG). The JAMS presented as a simplified and flexible for use on the necessary adaptations to process and generate consistent data with the climatological and hydrological characteristics of the study area. The constructed model was effective in predicting the hydrological response of the basin evaluated, with a Nash-Sutcliffe coefficient of 0.76 and 0.81, for periods of calibration and validation of the model, respectively. It was also satisfactory prediction of runoff volume, with a bias of -1.3 and -1.03% for the two periods. The runoff time series reproduction showed that the baseflow represents from 79 to 89% of the annual total runoff in the Ribeirão da Onça watershed. Therefore, the constructed model becomes an important tool for reconstruting the time series fluviometric data from Ribeirão da Onça basin, important for the improvement of the recharge studies and SAG protection.
Barlović, Robert. "Traffic jams cluster formation in low-dimensional cellular automata models for highway and city traffic /." [S.l. : s.n.], 2003. http://deposit.ddb.de/cgi-bin/dokserv?idn=969248830.
Full textBarlovic, Robert. "Traffic Jams : Cluster Formation in Low-Dimensional Cellular Automata Models for Highway and City Traffic." Gerhard-Mercator-Universitaet Duisburg, 2003. http://www.ub.uni-duisburg.de/ETD-db/theses/available/duett-10312003-150115/.
Full textWallerstein, Nicholas Paul. "Impact of Large Woody Debris on fluvial processes and channel geomorphology in unstable sand-bed rivers." Thesis, University of Nottingham, 1999. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.311841.
Full textAdamovic, Marko. "Development of a data-driven distributed hydrological model for regional scale catchments prone to Mediterranean flash floods. Application to the Ardèche catchment, France." Thesis, Grenoble, 2014. http://www.theses.fr/2014GRENU039/document.
Full textThe scientific objective of the thesis is to progress in regional spatial hydrological modeling in the context of flash floods that represent one of the most destructive natural hazards in the Mediterranean region. Emphasis is put on catchment scaling issues and derivation of simplified equations and models applicable to basins of medium to large size to best describe landscape heterogeneity and process complexity. These are the key issues in facilitating the model set up in the context of the whole catchment and trying its application in ungauged catchments too. To address these issues, a simplified spatial hydrological modeling over sub-catchments is first proposed where parameters are essentially derived from available information (cartographic utmost). For this purpose, the Kirchner (WRR, 2009) method that assumes that discharge at the outlet is only a function of catchment storage is specifically studied in the context of Mediterranean catchments. The next step is to create a new distributed hydrological model based on the data driven methodology of Kirchner within the JAMS modeling framework. The parameters of the simple model are estimated at the gauged locations and a regionalization is done according to geology. The catchment is discretized into sub-catchments of about 10 km2. The final step is to proceed with data coupling with the MAGE 1D hydraulic model developed at HHLY to consider river propagation effects on the simulated hydrographs. The coupling is external, meaning that outputs from the hydrological model in JAMS modeling system become inputs to the hydraulic model MAGE. Outputs are discharge rates in the reach network that are transferred into the MAGE model as either lateral flows (coming from adjacent land) and/or local inflows. The case study of the thesis is the Ardèche catchment (2388 km²), which is one of the French pilot sites for the HyMeX international program (Hydrological Cycle in the Mediterranean Experiment, http://www.hymex.org/). The proposed thesis also contributes to the FloodScale project (Multi-scale hydrometeorological observation and modeling for flash floods understanding and simulation, http://floodscale.irstea.fr/ ). The application of the Kirchner (2009) methodology shows that resulting discharge simulation results are good for granite catchments, found to be predominantly characterized by saturation excess runoff and sub-surface flow processes. The simple dynamical system hypothesis works especially well in wet conditions (peaks and recessions are well modeled). On the other hand, poor model performance is associated with summer and dry periods when evapotranspiration is high and operational low-flow discharge observations are inaccurate. In the Ardèche catchment, inferred precipitation rates agree well in timing and amount with observed gauging stations and SAFRAN data reanalysis during the non-vegetation periods. The model should further be improved to include a more accurate representation of actual evapotranspiration, but provides a satisfying summary of the catchment functioning during wet and winter periods. The coupling of the resulting hydrological model with the MAGE 1D hydraulic model provides satisfying results. However, the results show that the timing and magnitude of simulated discharge with coupled model is as good as by the hydrological model with a simple kinematic wave equation for flow routing. We argue that in situations when there is a significant overflow in the floodplain the interest of the coupling with the hydraulic model becomes crucial
Labbas, Mériem. "Modélisation hydrologique de bassins versants périurbains et influence de l'occupation du sol et de la gestion des eaux pluviales : Application au bassin de l'Yzeron (130km2)." Thesis, Université Grenoble Alpes (ComUE), 2015. http://www.theses.fr/2015GREAU006/document.
Full textGrowing urbanization and related anthropogenic processes have a high potential to influencehydrological process dynamics. Typical consequences are an increase of surface imperviousnessand modifications of water flow paths due to artificial channels and barriers (combined and separatedsystem, sewer overflow device, roads, ditches, etc.). Periurban catchments, at the edgeof large cities, are especially affected by fast anthropogenic modifications. They usually consistof a combination of natural areas, rural areas with dispersed settlements and urban areas mostlycovered by built zones and spots of natural surfaces. Spatialized hydrological modeling tools, simulatingthe entire hydrological cycle and able to take into account the important heterogeneityof periurban watersheds can be used to assess the impact of stormwater management practiceson their hydrology.We propose a new modeling tool for these issues : the hourly distributed J2000P model.This model simulates the hydrological processes in rural and urban areas and takes into accountthe sewerage networks, connections to these networks and overflows from sewer overflow devices(SOD). The application site is the Yzeron catchment (˜ 130 km2), located in the West of Lyon.The evaluation, conducted at the outlet of different sub-basins with different sizes and landuse, shows very encouraging results. The model tends to underestimate the discharge but thedynamics of the peaks and the SOD overflows are well simulated. The model is also used to testthe impact of changes in land use and/or stormwater management on the hydrological response.The results show that land use management has less impact on the hydrology of the catchmentthan stormwater management
Morris, Arthur E. L. "Influence of stream corridor geomorphology on large wood jams and associated fish assemblages in mixed deciduous-conifer forest in Upper Michigan." Connect to resource, 2005. http://rave.ohiolink.edu/etdc/view?acc%5Fnum=osu1123513768.
Full textTitle from first page of PDF file. Document formatted into pages; contains xvi, 263 p.; also includes graphics (some col.). Includes bibliographical references (p. 241-263). Available online via OhioLINK's ETD Center
Balažovičová, Nikola. "Testování mikrometody izolace DNA z listů, plodů a výrobků z ovoce." Master's thesis, Vysoké učení technické v Brně. Fakulta chemická, 2019. http://www.nusl.cz/ntk/nusl-401887.
Full textHansson, Torsten. "Enhancing Game Jam Experiences: Finding more productive and focused group work interactions through establishing a framework." Thesis, Malmö högskola, Fakulteten för teknik och samhälle (TS), 2014. http://urn.kb.se/resolve?urn=urn:nbn:se:mau:diva-22996.
Full textBelaaoui-Aksas, Ghania. "Migration des progéniteurs hématopoïétiques à travers l'endothélium : étude du rôle des molécules d'adhésion de la famille des Nectines, des JAMs et des molécules CD99 et CD146." Aix-Marseille 2, 2005. http://www.theses.fr/2005AIX20665.
Full textNectins (CD111/CD112/CD155), JAMs (JAM-A/JAM-C), CD99 and CD146 are expressed on haematopoietic progenitors (HP) and on inter-endothelial junctions. We explored their implication in adhesion, trans-endothelial migration and "homing" of human HP in NOD/SCID mice. In vitro migration implies CD99 and JAM-A. Non-specific reactions in vivo did not make it possible to conclude to this role. Homografts models would allow such conclusions. Most studied molecules are implicated in monocytes migration. So, molecular mechanisms of HP migration should be different from those of leucocytes. We discuss the assumptions that result from this. CD111 and CD99 expression on the HP is variable. CD111 is slightly expressed on immature HP and increases in the erythroïd compartment since the CFU-E stage. Its blockade during erythropoïesis did not detect its role. A similar approach is underway to study CD99
Pereira, Tiago Duarte Santos. "Processo aerado termofílico combinando biomassa aderida e suspensa para tratamento de água residuária sintética de indústria de geleias e compotas de frutas." Universidade de São Paulo, 2014. http://www.teses.usp.br/teses/disponiveis/18/18138/tde-29092014-170100/.
Full textThe aim of this study was to investigate the attached and suspended biomass performance in the organic matter removal of a synthetic jams and jellies wastewater at different temperature (25ºC, 27ºC, 45ºC and 55ºC). Two stainless steel reactors, 15 cm diameter and 58 cm high were used. The working volume was 10,25 L and the support medium occupied 5,125 L. The experiment was developed in two stages. The first stage lasted 75 days, the R1 and R2 reactors operated at 25ºC and 45ºC, respectively. The second stage lasted 60 days and the reactors operated at 27ºC and 55ºC, respectively. The HRT ranged between 10,39h and 11,86h and the volumetric load between 2,82 kg.m-3.d-1 to 3,51 kg.m-3.d-1.The highest removal efficiencies of COD occurred in R1(25ºC) and R2(45ºC) reactors: 80,27±11,97% and 78,41±6,41%, respectively. These results were not statistically different. The colonization of the support medium was satisfactory, except at 55ºC, as in this condition it was observed decreased adhesion of biomass. Bulking occurred in both stages of the experiment, probably due to the high biodegradability of this wastewater, and a highest value of MLVSS in the effluent of the thermophilic systems. The kinect experiments appointed that the suspended biomass play a minor role in the global efficiency of the system. The DGGE analysis have shown reduction in diversity when the temperature increases from 25ºC to 45ºC, nevertheless, this change was not so clear from 45ºC to 55ºC.
Hermann, Jonas. "Design and Facilitation of Event-Based Open Innovation : A study about regular company arrangements for enhanced innovativeness." Thesis, KTH, Maskinkonstruktion (Inst.), 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-245079.
Full textThe front end of a corporate’s innovation process has caught much attention in contemporary academic research. Efforts discuss how to structure the “fuzzy frontend of innovation” and introduce a concept widely known as “open source” – the involvement of third party individuals to the development process. This Masters thesis specifically focuses on open innovation through the medium of event-based innovation facilitation; e.g through workshops, hackathons, idea jams and other events that include both external users and experts as well as employees or partners within organizations. By designing, hosting, monitoring and evaluating an innovation event called “LiveHacks”, this thesis collects relevant data to understand both, the motives of corporations as well as of individuals to participate in open innovation events. Finally, this thesis assesses how to host successful open innovation events and develops a generalized template for third party adoption.
Zanule, Paul Gudoi. "Road Management System and Road Safety in Uganda." ScholarWorks, 2015. https://scholarworks.waldenu.edu/dissertations/368.
Full textAlvarado-Vega, Sonia-Luz. "Estudio de prefactibilidad para la instalación de una planta procesadora de compotas a base de tarwi (Lupinus mutabilis) y manzana (Malus doméstica)." Bachelor's thesis, Universidad de Lima, 2016. http://repositorio.ulima.edu.pe/handle/ulima/3481.
Full textTrabajo de investigación
Aldana-Minaya, Horacio-Alfredo, and Ricardo-André Rivas-Romero. "Estudio de pre-factibilidad para la instalación de una planta productora de compotas para bebés a partir de durazno (Prunus persica) enriquecido con maca (Lepidium meyenii walpers), quinua (Chenopodium quinoa willdenow), kiwicha (Amaranthus caudatus linnaeus) y cañihua (Chenopodium pallidicaule)." Master's thesis, Universidad de Lima, 2016. http://repositorio.ulima.edu.pe/handle/ulima/3482.
Full textTrabajo de investigación
Hoppe, André. "Staus auf Deutschen Bundesautobahnen: Quantifizierung von Verlustzeiten anhand der Analyse historischer Staudaten." Master's thesis, Saechsische Landesbibliothek- Staats- und Universitaetsbibliothek Dresden, 2017. http://nbn-resolving.de/urn:nbn:de:bsz:14-qucosa-222916.
Full textThe estimation of time losses caused by traffic congestions have not previously been assessed by using assumptions of traffic flow dynamics. With a GPS-supported full survey of all jams from the year 2015 and parts of 2016 this master thesis tries to quantify the additional (congested) travel time on German Motorways. The analysis has shown that all jams reported on German highways produced time losses over 190 million vehicle-hours (amount of involved vehicles × congestion hours), which equals a monetary value of four billion euros for the involved drivers. Furthermore the ranking of the respective bottlenecks has been developed over the year and main congestion hotspots on motorways have been revealed. By using a precisely defined local, temporal and objective delimitation, this method could be used for further research and developments of navigation services as well
Foss, Susan J. "Modeling the Aggregation of Interacting Neurofilaments in the Axon." The Ohio State University, 2015. http://rave.ohiolink.edu/etdc/view?acc_num=osu1431078489.
Full textHjelm, Christoffer, and Per Järvinen. "VR-tjänsters utmaningar och möjligheter för samskapande inom hustillverkningsbranschen." Thesis, Luleå tekniska universitet, Institutionen för system- och rymdteknik, 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-69478.
Full textHeasman, Michael Kenneth. "Influence of changing patterns of sucrose consumption on industrial users : response by manufacturers of soft drinks, biscuits, cereals, cakes confectionery, ice-cream, jams, canned products and other sugar-containing foods to the U.K. dietary guidelines that relate to sucrose consumption." Thesis, University of Bradford, 1988. http://hdl.handle.net/10454/4223.
Full textHeasman, Michael Kenneth. "Influence of changing patterns of sucrose consumption on industrial users. Response by manufacturers of soft drinks, biscuits, cereals, cakes confectionery, ice-cream, jams, canned products and other sugar-containing foods to the U. K. dietary guidelines that relate to sucrose consumption." Thesis, University of Bradford, 1988. http://hdl.handle.net/10454/4223.
Full textKlumpp, Stefan. "Movements of molecular motors : diffusion and directed walks." Phd thesis, [S.l. : s.n.], 2003. http://pub.ub.uni-potsdam.de/2003/0020/klumpp.pdf.
Full textSenna, Sidney Lima de. "Computação evolucionária aplicada ao diagnóstico de falhas incipientes em transformadores de potência utilizando dados de cromatografia." Universidade Federal de Minas Gerais, 2010. http://hdl.handle.net/1843/JAVS-8FDFGX.
Full textEm uma subestação elevadora, os transformadores de potência são os equipamentos responsáveis pela elevação dos valores de tensão, com o objetivo de transmitir a energia elétrica em alta tensão com redução das perdas por efeito Joule. Por outro lado, nos centros consumidores, os transformadores das subestações são responsáveis por rebaixar o nível de tensão para permitir a distribuição nos centros urbanos. Percebe-se, então, a importância desses equipamentos e a necessidade de mantê-los em perfeito funcionamento. Uma falha grave gera um elevado custo de manutenção corretiva, queda nos indicadores de desempenho, além de multas por parte da agência reguladora - Agência Nacional de Energia Elétrica - ANEEL . Portanto é altamente desejável avaliar a vida útil de um transformador de potência, ou pelo menos identificar as falhas incipientes no transformador antes que ocorra uma falha catastrófica. O fim da vida útil de um transformador de potência está diretamente relacionado ao fator térmico, isto é, quando ele está em operação o mesmo é submetido a elevadas temperaturas, impactando, de forma negativa, seu sistema de isolamento. O sistema de isolamento do transformador pode ser dividido em sólido (constituídos à base de celulose) e líquido (por meio da imersão do transformador em um tanque preenchido com óleo isolante). Os estresses térmicos e elétricos, sofridos pelo transformador em operação, ocasionam a degradação do papel e do óleo isolante. Com o envelhecimento do óleo mineral, formam-se gases que são produzidos de forma mais acentuada quando ocorre alguma falha. Para evitar danos aos transformadores, as concessionárias de energia elétrica têm adotado procedimentos de manutenção preventiva, no entanto os custos envolvidos nesse tipo de procedimento podem ser minimizados por meio de manutenções preditivas. A manutenção preditiva pode indicar o melhor momento para a realização da manutenção preventiva, evitando gastos desnecessários. Esta dissertação trata do desenvolvimento, análise e implementação de uma nova metodologia a qual utiliza um algoritmo evolucionário baseado em Programação Genética para detectar regras em base de dados de transformadores, com a finalidade de predição de falhas incipientes. Para melhorar a capacidade no diagnóstico de falhas utilizando informações sobre os gases dissolvidos no óleo isolante, foi desenvolvido um framework denominado MINERA para descoberta de regras em base dados. Esta ferramenta emprega um algoritmo de Programação Genética modificado que utiliza conceitos da Teoria da Informação, tais como Entropia e Ganho de Informação. O framework também fornece suporte para tirar máximo proveito da arquitetura de processadores com múltiplos núcleos.
Reichert, Bárbara. "Agrotóxicos em doces de frutas em pasta: determinação de resíduos por μlc-qtrap-ms/ms e estudo de estabilidade." Universidade Federal de Santa Maria, 2015. http://repositorio.ufsm.br/handle/1/3408.
Full textThis work presents multi-method for pesticide residues determination in fruit jams. Slurries of the fruit jams and ultrapure (u.p.) water were prepared to yield homogeneous samples and to facilitate the sample handling. The modified QuEChERS method was used for the sample preparation. Due the high detectability of the micro flow liquid chromatography triple quadrupole-linear ion trap mass spectrometry equipment (μLC-QTRAP-MS/MS) and to minimize the matrix effect (%) the acetonitrile extracts were diluted 30-fold before analysis. The method validation was performed analyzing spiked samples at the concentrations of 9 and 45 μg kg-1 (n=5). The method met validation criteria of 70 120% recovery and relative standard deviation (RSD) ≤ 20% for 93% (99) of the 107 pesticides evaluated. The reporting limit (RL) was 9 and 45 μg kg-1 for, respectively, 66% and 26% of the analytes, 5% of the compounds did not fulfill the requirements for validation and 3% were not detected at the studied concentrations. The validated method was applied to the analysis of 51 different fruit jam samples from Brazil and from Spain. Pesticide residues were detected in 80% of the samples, 51% of which contained at least one pesticide at concentration higher than 10 μg kg-1. Moreover, the stability of five pesticides was evaluated in the preparation of home-made fruit jams from spiked fruits. Thereunto, five types of fruits (orange, apple, strawberry, pear and peach, with n=2 for each type of fruit) were grinded and spiked at 500 μg kg-1 with a mixture of carbendazim, chlorpyrifos, imidacloprid, iprodione and propargite. Home-made jams were prepared with these spiked samples by cooking, over medium heat, the grinded spiked fruit with sugar and u.p. water (ratio, 5:5:2, w/w/w), in an open pan for 30 min. The modified QuEChERS extraction method was applied either to blank fruits, to the fruits spiked at 500 μg kg-1 and to the home-made jams (prepared from spiked fruits at 500 μg kg-1). The extracts of home-made jams and blank fruits were analyzed by liquid chromatography quadrupole-time of flight mass spectrometry (LC-QTOF-MS) to ascertain the occurrence of the known metabolites of the spiked pesticides and to determine the number of co-extracted matrix components from the fruits and from the jams. All samples were also analyzed by μLC-QTRAP-MS/MS for estimation of the pesticides processing factors. So the pesticide concentrations found in the spiked fruits were compared to the concentrations found in the home-made jams (pesticide concentration measured in the jams/pesticide concentration measured in the raw fruits).
Este trabalho apresenta um método multirresidual para determinação de resíduos de agrotóxicos em doces de fruta em pasta. Para obter-se amostras homogêneas e de fácil manipulação preparou-se uma mistura (slurry) dos doces de frutas e água ultrapura (u.p.). O preparo das amostras foi feito utilizando o método QuEChERS modificado. Com o objetivo de diminuir o efeito matriz (%) das amostras e pela alta detectabilidade do equipamento de cromatografia de micro vazão a líquido acoplada à espectrometria de massas híbrida triplo quadrupolo-armadilha de íons linear (μLC-QTRAP-MS/MS) os extratos de acetonitrila foram diluídos na razão de 1:30 (v/v) antes da análise. A validação do método analítico foi feita pela análise de amostras de doces de uva fortificadas nas concentrações de 9 e 45 μg kg-1 (n=5). Dos 107 agrotóxicos avaliados 93% (99) obtiveram recuperações de 70 a 120% e desvio padrão relativo (RSD) ≤ 20%. Os limites de notificação (RL) foram de 9 e 45 μg kg-1 para, respectivamente, 66% e 26% dos agrotóxicos avaliados, 5% dos compostos não alcançaram os pré-requisitos necessários para a validação e 3% não foram detectados nas concentrações estudadas. Após a validação do método, foram analisadas 51 amostras de doces de frutas provenientes do Brasil e da Espanha. Em 80% amostras foram detectados resíduos de agrotóxicos, 51% destas continham no mínimo um agrotóxico em concentração maior que 10 μg kg-1. Além disso, avaliou-se a estabilidade de cinco agrotóxicos no preparo de doces de frutas caseiros. Para isso, cinco tipos de frutas (laranja, maçã, morango, pera e pêssego, com n=2 para cada tipo de fruta) foram trituradas e fortificadas com uma mistura de carbendazim, clorpirifós, imidacloprido, iprodiona e propargito a 500 μg kg-1. Essas amostras foram utilizadas no preparo de doces de frutas caseiros. Para isso, as frutas trituradas e fortificadas foram cozidas com açúcar e água u.p. (proporção de 5:5:2, m/m/m) em panela aberta sob fogo médio durante 30 min. O método QuEChERS modificado foi aplicado às frutas não fortificadas, às frutas fortificadas (500 μg kg-1) e aos doces de frutas caseiros (preparados com frutas fortificadas a 500 μg kg-1). Os extratos dessas amostras foram analisados por cromatografia a líquido acoplada à espectrometria de massas híbrida quadrupolo-de tempo de voo (LC-QTOF-MS), com o objetivo de verificar a presença dos metabólitos conhecidos dos agrotóxicos e determinar o número de componentes coextraídos das matrizes. Todas as amostras foram analisadas também por μLC-QTRAPMS/ MS com o objetivo de comparar a concentração dos agrotóxicos nas frutas fortificadas com as concentrações nos doces de frutas correspondentes. A partir dessa relação foi possível estimar um fator de processamento (FP) para os agrotóxicos no preparo dos doces de frutas caseiros (concentração do agrotóxico no doce de fruta/concentração do agrotóxico na fruta fortificada).
Bushroe, Jennifer Danielle. "James." Thesis, The University of Arizona, 2010. http://hdl.handle.net/10150/146900.
Full textMacLean, Lisa A. "Henry James and James McNeill Whistler, representing modernity." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1997. http://www.collectionscanada.ca/obj/s4/f2/dsk3/ftp04/nq25103.pdf.
Full textBerg, Elena Catherine. "Parentage, kinship, and group structure in the white-throated magpie-jay (Calocitta formosa), a cooperative breeder with female helpers /." For electronic version search Digital dissertations database. Restricted to UC campuses. Access is free to UC campus dissertations, 2004. http://uclibs.org/PID/11984.
Full textRoučová, Jana. "Podnikatelský plán založení firmy na výrobu a prodej džemů." Master's thesis, Vysoké učení technické v Brně. Fakulta podnikatelská, 2016. http://www.nusl.cz/ntk/nusl-241444.
Full textCruz, Moscoso Franklin de la. "James Joyce’s Early Works: James Joyce’s “The Dead” in Dubliners." Tesis, Universidad de Chile, 2005. http://www.repositorio.uchile.cl/handle/2250/110291.
Full textThe present report, then, will focus on the “The Dead”, mainly, to show its intrinsic worth and the possible relations existing between it and the other stories within Dubliners, and Joyce’s next work, A Portrait of the Artist as a Young Man.
Sutherland, Kerry L. "The Prince of Agents: James Brand Pinker and Henry James." Kent State University / OhioLINK, 2012. http://rave.ohiolink.edu/etdc/view?acc_num=kent1350659360.
Full textWhichard, Willis P. "Justice James Iredell /." Durham, NC : Carolina Academic Press, 2000. http://www.gbv.de/dms/spk/sbb/recht/toc/312651147.pdf.
Full textLargent, Daryl L. "James the Third." University of Akron / OhioLINK, 2012. http://rave.ohiolink.edu/etdc/view?acc_num=akron1334777710.
Full textJames, Brianna Jean. "Connecting students and real world community problems with science learning: using relevant issues and prior knowledge as contextual scaffolds for science achievement." Thesis, Montana State University, 2011. http://etd.lib.montana.edu/etd/2011/james/JamesB0511.pdf.
Full textCross, James A. "A comparison of sound exposure profiling with the basic sound survey as applied in an academic laboratory environment." Oklahoma City : [s.n.], 2003. http://library.ouhsc.edu/epub/theses/Cross-James-Allyn.pdf.
Full textMayo-Bobee, Dinah. "Book Review of A Companion to James Madison and James Monroe." Digital Commons @ East Tennessee State University, 2014. https://dc.etsu.edu/etsu-works/725.
Full textAllen, Gleed Kim M. "Joyce in France, Joyce in French translation, culture, literary fame /." Diss., Online access via UMI:, 2005.
Find full textBoyd-MacMillan, Eolene Moore. "Christian transformation : an engagement with James Loder, mystical spirituality, and James Hillman." Thesis, University of Cambridge, 2004. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.615996.
Full textValihora, Karen. "Reading the late James." Thesis, McGill University, 1991. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=61044.
Full textWells, Dominic Peter. "James MacMillan : retrospective modernist." Thesis, Durham University, 2012. http://etheses.dur.ac.uk/5932/.
Full textKwok, Hang-wah Yvonne, and 郭亨華. "William James' psychological philosophy." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2002. http://hub.hku.hk/bib/B29798462.
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Master of Philosophy
Sastri, Reena. "James Merrill : knowing innocence /." New York : Routledge, 2007. http://catalogue.bnf.fr/ark:/12148/cb41092519r.
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