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1
Nyawo, Talent. "Design of a rotary valve for pressurised steam." Thesis, KTH, Maskinkonstruktion (Inst.), 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-192859.
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Denna rapport är gjord på ett examensarbete som var utfört på uppdrag av det svenska företaget Ranotor AB. Syftet var att utveckla en konceptuell lösning för en rotationsventil som skall fungera i en miljö med hög temperatur och högt tryck. Ventilen skall arbeta under höga rotationshastigheter, vilket kräver korta öppettider.Tekniska hjälpmedel såsom SolidWorks, ANSYS och MATLAB användes för att modellera och analysera de konceptuella lösningarna. Slutlösningen valdes från ett flertal olika koncept, varpå detta vidareutvecklades och optimerades. Betydande material och gastätningslösningar identifierades och utvärderades för att hitta den bästa lösningen. Optimering av individuella komponenter och hela anordningen gjordes med avseende på spänning, termisk- och dynamisk analys. De givna specifikationerna uppfylldes och resultaten var tillfredsställande. Resultaten ger en teoretisk bas för vidareutveckling och applicering av en rotationsventil in en miljö med hög temperatur och högt tryck.This Master thesis is a project commissioned by the Swedish company Ranotor AB. The objective of this thesis is to develop a conceptual solution for a rotary valve mechanism that has to work efficiently in a high-temperature and high-pressure environment. The valve is to operate at high rotational speeds which calls for very short opening time.Modern engineering tools namely Solidworks, Ansys and Matlab, were employed for modelling and analysis of the conceptual solution.The best design solution was selected from three developed concepts, and the selected concept was further developed and optimized. Major material candidates and gas-tight sealing solution were identified and evaluated and the optimal material and seal design was chosen. Optimization of the individual components as well as the whole assembly was performed based on stress, thermal and dynamic analysis. The given design specifications and functions were fulfilled and the results were satisfactory. The obtained results provide a theoretical foundation for the development and application of a rotary valve in high-temperature and high-pressure environment.
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Stieha, Joseph K. "INVESTIGATION OF AN AXIAL FLOW ROTARY VALVE SEAL." UKnowledge, 2017. https://uknowledge.uky.edu/me_etds/101.
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This thesis investigates potential materials to be used in the rotary sealing industry that provide low power loss and minimize cost. The studied rotary valve utilizes slots that act as timing valves to allow for flow axially, through the seal face, at particular times within a heat pump cycle. This investigation examines various combinations of multiple PTFE materials, plastics, and soft metals that have been proven to provide low friction coefficients. Leakage and wear requirements are stated for the future use of the rotary valve and are used to determine the effectiveness of sealing the fluid while examining the power loss. In conclusion, the study finds the combination of a modified PTFE stationary ring and Aluminum Bronze rotating face to provide the lowest power loss. Numerical analysis was completed to verify the lubrication regime to be partial lubrication and was also used to investigate geometry changes and impact on the power loss.
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Browning, Patrick H. "Transient flow characteristics of a high speed rotary valve." Morgantown, W. Va. : [West Virginia University Libraries], 2009. http://hdl.handle.net/10450/10543.
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Thesis (Ph. D.)--West Virginia University, 2009.Title from document title page. Document formatted into pages; contains xv, 138 p. : ill. (some col.). Vita. Includes abstract. Includes bibliographical references (p. 111-115).
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Peliks, Robert Bilgor. "Novel design of a rotary valve using axiomatic design." Thesis, Massachusetts Institute of Technology, 2005. http://hdl.handle.net/1721.1/32348.
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Thesis (S.M.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 2005.Includes bibliographical references (p. 110).
Rotary valves have existed for millennia; and while they have developed tremendously since the first Roman valves, many of the same problems have persisted. The basic problems are caused by the coupling of functional requirements, which limits the valve's performance. Using axiomatic design (AD), two of these couplings, including the coupling of the friction-sealing FRs, are studied and resolved. Although more work can be done to improve the patent-pending designs, the concepts presented represent advancements over existing rotary valve designs. The proposed designs have been analyzed for their merits as a valve and for their potential applications, such as in automotive engines.
by Robert (Beto) Bilgor Peliks.
S.M.
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Pinder, Shane D. (Shane Donald) Carleton University Dissertation Engineering Mechanical and Aerospace. "Design of a rotary control valve for an electrohydraulic ventricular assist device." Ottawa, 1996.
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Behrens, Justin William. "Modification and Performance Evaluation of a Mono-valve Engine." OpenSIUC, 2011. https://opensiuc.lib.siu.edu/theses/638.
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AN ABSTRACT OF THE THESIS OF Justin W. Behrens, for the Master of Science degree in Mechanical Engineering, presented on June 24, 2011 at Southern Illinois University Carbondale. TITLE: MODIFICATION AND PERFORMANCE EVALUATION OF A MONO-VALVE ENGINE MAJOR PROFESSOR: Dr. Suri Rajan A four-stroke engine utilizing one tappet valve for both the intake and exhaust gas exchange processes has been built and evaluated. The engine operates under its own power, but has a reduced power capacity than the conventional 2-valve engine. The reduction in power is traced to higher than expected amounts of exhaust gases flowing back into the intake system. Design changes to the cylinder head will fix the back flow problems, but the future capacity of mono-valve engine technology cannot be estimated. The back flow of exhaust gases increases the exhaust gas recirculation (EGR) rate and deteriorates combustion. Intake pressure data shows the mono-valve engine requires an advanced intake valve closing (IVC) time to prevent back flow of charge air. A single actuation camshaft with advanced IVC was tested in the mono-valve engine, and was found to improve exhaust scavenging at TDC and nearly eliminated all charge air back flow at IVC. The optimum IVC timing is shown to be approximately 30 crank angle degrees after BDC. The mono-valve cylinder head utilizes a rotary valve positioned above the tappet valve. The open spaces inside the rotary valve and between the rotary valve and tappet valve represent a common volume that needs to be reduced in order to reduce the base EGR rate. Multiple rotary valve configurations were tested, and the size of the common volume was found to have no effect on back flow but a direct effect on the EGR rate and engine performance. The position of the rotary valve with respect to crank angle has a direct effect on the scavenging process. Optimum scavenging occurs when the intake port is opened just after TDC.
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Mok, Keng Wa. "Design and control of an electromechanical variable rotary valve system for four-stroke engines." Thesis, University of Macau, 2008. http://umaclib3.umac.mo/record=b1942819.
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Okhotnikov, Ivan. "Design and performance evaluation of a rotary flow control valve for independent metering hydraulics." Thesis, Bournemouth University, 2018. http://eprints.bournemouth.ac.uk/31282/.
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Off road heavy machinery is the second largest contributor to air pollution in terms of the levels of fossil fuel consumption after road cars. This is partly attributed to inefficient power hydraulic systems used to drive these machines’ tools or instruments. A relatively recent idea of an independent metering technology has become a major topics in improving efficiency, reducing fuel consumption and saving energy. Current research and development of independent metering applied to fluid power systems enables energy recuperation capabilities of hydraulics. However, actual industrial implementation cases are still rare, especially in application requiring high flow rates. Flow control valves are used in flow regulation and controlling of hydraulic actuators’ speed. The speed control occurs through throttling, which causes large power losses. Moreover, the substantial flow forces acting on the throttling parts of the valve in high flow rate regimes has resulted in the application of sophisticated multi-staged servo valves. An alternative one-stage design can resolve these issues, but such proposals and studies are still scarce in the literature. This research looks at new design ideas as the means to improve hydraulic valve performance and efficiency. The novelty is also to enable single staged valves to be used in high flow rate applications. The main approach is to simplify and perform a complete redesign of the valve geometrical structure to replace the existing spool and seat valve configuration. The novel design proposed in this thesis is based on a rotary tubular structure, which is less bulky and much lighter. The focus of this investigation has been on the study of the flow characteristics and fluid structure interaction of the new valve’s moving parts using a combination of theoretical, simulation-based and experimental studies. A prototype of the final design was manufactured and tested to validate the simulated data. Test results provided a good experimental validation of analytical and numerical models employed in this investigation. Detailed analysis of the performance of the new suggested valve proved its viability as a strong candidate to replace the existing in-efficient industry standard spool and seat valves. The metering characteristics of the new valve has demonstrated that alternatively designed one-staged flow control valves can create smaller pressure drops, hence, consume less power than the industry standard benchmark. The thesis presents the research, investigation and detailed analysis of a novel unconventional valve design suitable for the independent metering architecture. This research demonstrates the feasibility of the independent metering architecture for use in high flow rates applications. This research further consolidates the position of this new valve can have within the fluid power industry, further expands its range of application paving the way for industry adoption to replace old valves with a new and more efficient valve system.
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Shrestha, Amit. "Development and Performance Evaluation of a Mono-Valve Engine." Available to subscribers only, 2009. http://proquest.umi.com/pqdweb?did=1879983291&sid=1&Fmt=2&clientId=1509&RQT=309&VName=PQD.
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Andersson, Victor. "Flödesanalys av roterande ventil i ångmotor." Thesis, Karlstads universitet, Fakulteten för hälsa, natur- och teknikvetenskap (from 2013), 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:kau:diva-68099.
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This report is a bachelor thesis at Karlstad University in collaboration with Invencon AB and Ranotor AB. The goal was to analyze a rotating valve leading water vapor through an inlet and five outlets. The quantifiable results that were addressed in this project are the mass flow through the outlets and the forces affecting the valve and its shaft (primarily radial forces). The tools used for this project are PTC Creo and ANSA for modelling and mesh as well as ANSYS-CFX and Matlab for computational help. The results show that the specified rotational speed of 4600 rpm doesn’t work for this model. The rotational speed was chosen because of an interest in this specific operating condition. A 3 mm radial gap between the rotating valve and the valve housing proved to cause a leakage in the form of pressure loss inside the valve. The boundary conditions that were laid out for this project are not valid for this operating condition. Since the difference in pressure is large (100 down to 1 bar) the flow is choked. A large difference in pressure also makes it important to adjust the total area of the outlets, since the pressure drop affects the density of the vapor. The forces on the rotating valve that were calculated (using ANSYS-CFX) create a foundation for choosing bearings for the valve. If the construction is modified, and/or the rotating valve will operate at a different rotational speed these forces will be subject to change.Denna rapport är ett examensarbete på Karlstads Universitet i samband med Invencon AB och Ranotor AB. Målet var att analysera en roterande ventil som leder trycksatt vattenånga via ett inlopp och ut genom fem olika utlopp. De kvantifierbara resultaten som söktes var massflödet ut ur utloppen och krafterna som påverkar ventilen och axeln (främst radiellt). Verktyg som har använts för att analysera ventilen är PTC Creo och ANSA för modellering och mesh, samt ANSYS-CFX och Matlab för beräkningshjälp. Resultaten tyder på att det valda varvtalet, 4600 rpm, inte fungerar så bra. Varvtalet valdes pågrund av att man var intresserad av driftsfallet. Ett 3 mm radiellt avstånd mellan ventil ochventilhus visade sig även ge läckage i form av tryckfall inuti ventilen. Randvillkoren som är specificerade är inte giltiga vid detta driftsfall. Eftersom tryckförhållandet är så högt (100 till 1 bar) så är flödet chokat. Stor tryckskillnad gör det viktigt att anpassa arean på utloppen, då tryckfall påverkar densiteten. Krafterna på den roterande ventilen som beräknades (i ANSYS-CFX) är ett underlag vid val av lager för ventilen. Om konstruktionen modifieras, och/eller ventilen kommer att användas vid ett annat varvtal så kommer dessa krafter att ändras.
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Waitschat, Arne, Frank Thielecke, Robert M. Behr, and Ulrich Heise. "Active Fluid Borne Noise Reduction for Aviation Hydraulic Pumps." Saechsische Landesbibliothek- Staats- und Universitaetsbibliothek Dresden, 2016. http://nbn-resolving.de/urn:nbn:de:bsz:14-qucosa-199594.
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The aviation environment holds challenging application constraints for efficient hydraulic system noise reduction devices. Besides strong limits on component weight and size, high safety and reliability standards demand simple solutions. Hence, basic silencers like inline expansion chambers and Helmholtz-Resonators are state-of-the-art aboard commercial aircrafts. Unfortunately, they do not meet today’s noise attenuation aims regarding passenger comfort and equipment durability. Significant attenuation performance is expected from active concepts that generate anti-phase noise. However, such concepts remain a long term approach unless related costs, e.g. due to additional power allocation and real-time control equipment can be avoided. In this paper an active fluid borne noise attenuation concept is discussed that accounts for the mentioned constraints. An aircraft hydraulic pump is considered as main noise source. The active attenuator is an in-house rotary valve design. The basic feature is a known direct shaft coupling principle of pump and rotary valve, so no speed/ frequency control of the valve and no separate power supply are required. The common-shaft principle is further simplified here and proposed as integral feature of future “smart pumps”.
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Kessel, Stephen Ronald. "The interaction between rotary valves and pneumatic conveying pipelines." Thesis, University of Greenwich, 1985. http://gala.gre.ac.uk/9292/.
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The object of this work was to investigate the interaction between rotary valves and pneumatic conveying pipelines and the effect which this can have on overall system performance. A review of previous work and current industrial practice revealed that very little work has been published on this subject, although it was evident that some manufacturers of pneumatic conveying systems do have preferred entrainment configurations. Consequently, a preliminary experimental investigation was undertaken with a transparent model of a rotary valve and drop-out box in order to observe the air and solid flow patterns inside the drop-out box. This provided the most important outcome of this work, that is, the discovery that two distinctly different modes of flow can exist in the chamber of a conventional drop-out box. The first of these is a turbulent swirling motion caused by the conveying airstream and is the most desirable operating condition because it results in the most effective entrainment of material into the conveying line. The second is a situation where the drop-out box is effectively 'choked' with product. Models to explain these two conditions have been developed and subsequently tested against data obtained from a full size positive pressure conveying system specifically constructed for this purpose. An extensive experimental programme has been carried out in which the performance of this system was examined with a selection of different entrainment configurations and different test materials. The principal variables investigated were the height and volume of the drop-out box, the orientation of the rotary valve with respect to the pipeline and the conveying air velocity. As a result of this work guidelines have been produced for interfacing rotary valves with pneumatic conveying pipelines. These have been presented as a simple list of eight points and it is anticipated that they will enable systems to be designed with more confidence than has been possible previously.
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Luharuka, Rajesh. "An electromagnetically actuated rotary gate microvalve with bistability." Diss., Atlanta, Ga. : Georgia Institute of Technology, 2007. http://hdl.handle.net/1853/22576.
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Thesis (Ph. D.)--Mechanical Engineering, Georgia Institute of Technology, 2007.Committee Chair: Hesketh, Peter J.; Committee Member: Allen, Mark G.; Committee Member: Degertekin, F. Levent; Committee Member: Frazier, Bruno A.; Committee Member: Graham, Samuel.
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Dietrich, Ingo, Lukas Zinßer, Tim Müller, Gerhard Ludwig, and Peter F. Pelz. "Rotor swivel motor as actuator of an innovative control valve." Technische Universität Dresden, 2020. https://tud.qucosa.de/id/qucosa%3A71256.
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To minimize the complexity of existing process control valves, the authors derived a new control valve design by functional separation and functional integration of functions. One key element of this new valve design is the functional integration of teh actuator into the valve´s throttle. A hydraulic swivel motor is operated with the process fluid, in this case water. The pressure difference to operate the motor comes from the valve itself. Within this paper we present the control valve design and show in detail how we used the Fail-Early design method to develop the hydraulic swivel motor. The construction is discussed using the experience from manufacturing the prototype and the first exp erimental results are shown. The experiments yield, that the swivel motor principle is promising. Finally, the next development issues are discussed.
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Lacerda, Renato Santos. "ROTARY CLUB PODER INVISÍVEL NA TERRA PROMETIDA (1959-1967)." Universidade Federal do Espírito Santo, 2007. http://repositorio.ufes.br/handle/10/6323.
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Previous issue date: 2007-07-27In this research, the spotlights are aimed on the historical years between 1959 and 1967, with the main purpose of showing the scenic arrangements of the installation, organization and performance of a Rotary Club in a geographical scenery that was in mutation phase. That territory, formerly denominated Promised Earth or Canaan of the Industry, was soon substituted by the nomenclature Steel Valley .The partners founders of that first Rotary Club conceived themselves as foreigners from the Canaan of the State of Minas that emanated "milk and honey". Native from another lands, they met each other and they were met in order to form a service club in the Nacional Valley of Redemption, but with intense institutional entails to an international corporation. Organized under the doctrine of the interest well understood, the associated agents, each one, with his composition and capital volume, of economic, cultural, social, symbolic or political nature, they allowed, through the mechanism of capital convertibility, to concentrate, in the regional community, a power, capable to produce real effects without apparent waste of energy. As a voluntary and oligarchical association, this service club was, in a way, a institutional vehicle, in the local sphere, of appropriation, incorporation, reproduction and diffusion of visions of world of the ideological corpus of International Rotary.
Nesta pesquisa, os holofotes estão apontados sobre os anos históricos, compreendidos entre 1959 e 1967, com a finalidade última de mostrar os arranjos cênicos da instalação, organização e atuação de um Rotary Club num cenário geográfico que se encontrava em fase de mutação. Esse território, outrora denominado Terra Prometida ou Canaã da Indústria, foi logo substituído pela nomenclatura Vale do Aço. Os Sócios fundadores desse primeiro Rotary Club conceberam-se como forasteiros da Canaã do Estado de Minas que emanava leite e mel . Originários de outras terras, encontraram-se e foram encontrados para formarem um clube de serviço no Vale da Redenção Nacional, mas com fortes vínculos institucionais a uma corporação internacional. Organizados sob a doutrina do interesse bem compreendido, os agentes associados, cada qual, com sua composição e volume de capital, sejam eles de natureza econômica, cultural, social, simbólico e/ou político, que permitiu, através do mecanismo de convertibilidade de capital, potencializar, na comunidade regional, um poder capaz de produzir efeitos reais sem dispêndio aparente de energia. Como uma associação voluntária e oligárquica, esse clube de serviço foi, em alguma medida, um veículo institucional, na esfera local, de apropriação, incorporação, reprodução e difusão de visões de mundo do corpus ideológico do Rotary Internacional.
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Ferreira, Maria Lúcia da Silva. "As rotas culturais - âncoras da ludificação, atractividade e reconversão dos espaços rurais : a rota do românico do Vale do Sousa." Dissertação, Porto : [Edição do Autor], 2011. http://aleph.letras.up.pt/F?func=find-b&find_code=SYS&request=000211735.
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Na era pós-moderna em que vivemos, o mundo rural vai perdendo a sua função produtiva, sobretudo pela crescente vaga globalizante, em tudo comprometedora da viabilidade económica de um modo de vida em zonas mais periféricas. Numa tentativa de inverter esse processo, decisores locais empreendem sinergias no sentido de prover ganhos àquelas regiões, usando, para isso, o binómio: Património + turismo, implicado no aparecimento de rotas culturais, expediente inovador colocado ao serviço da promoção dos recursos endógenos locais. Ora, foi esta experiência que suscitou o nosso interesse e deu azo ao presente estudo. Entender a operacionalidade das rotas culturais enquanto promotoras do património cultural transformado, à custa da patrimonialização, em produto turístico. Produto esse que se quer estratégico de modo a oferecer o genuíno e o autêntico a um mercado turístico fortemente composto por residentes em meio urbano que procuram o campo para “fins lúdicos”, reflexo da “mitificação” destes lugares, verdadeiros activadores de memórias/ identidades, associados, que são, às virtudes da vida bucólica do passado, em tudo contrárias ao actual frenesim das grandes urbes. Os exemplos de enfoque escolhidos: Rota do Fresco, Aldeias Históricas de Portugal e Mértola: Cidade Museu, possibilitaram um observatório em torno do património e da sua “moldagem” aos desígnios do reordenamento, requalificação e recuperação social de espaços repletos de fragilidades, agora, dotados de potencialidades lúdicas susceptíveis de dinamizar a auto-sustentabilidade daqueles territórios pela via do turismo cultural, tido como importante agente de desenvolvimento local. [...]
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Ferreira, Maria Lúcia da Silva. "As rotas culturais - âncoras da ludificação, atractividade e reconversão dos espaços rurais : a rota do românico do Vale do Sousa." Master's thesis, Porto : [Edição do Autor], 2011. http://hdl.handle.net/10216/57426.
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Na era pós-moderna em que vivemos, o mundo rural vai perdendo a sua função produtiva, sobretudo pela crescente vaga globalizante, em tudo comprometedora da viabilidade económica de um modo de vida em zonas mais periféricas. Numa tentativa de inverter esse processo, decisores locais empreendem sinergias no sentido de prover ganhos àquelas regiões, usando, para isso, o binómio: Património + turismo, implicado no aparecimento de rotas culturais, expediente inovador colocado ao serviço da promoção dos recursos endógenos locais. Ora, foi esta experiência que suscitou o nosso interesse e deu azo ao presente estudo. Entender a operacionalidade das rotas culturais enquanto promotoras do património cultural transformado, à custa da patrimonialização, em produto turístico. Produto esse que se quer estratégico de modo a oferecer o genuíno e o autêntico a um mercado turístico fortemente composto por residentes em meio urbano que procuram o campo para “fins lúdicos”, reflexo da “mitificação” destes lugares, verdadeiros activadores de memórias/ identidades, associados, que são, às virtudes da vida bucólica do passado, em tudo contrárias ao actual frenesim das grandes urbes. Os exemplos de enfoque escolhidos: Rota do Fresco, Aldeias Históricas de Portugal e Mértola: Cidade Museu, possibilitaram um observatório em torno do património e da sua “moldagem” aos desígnios do reordenamento, requalificação e recuperação social de espaços repletos de fragilidades, agora, dotados de potencialidades lúdicas susceptíveis de dinamizar a auto-sustentabilidade daqueles territórios pela via do turismo cultural, tido como importante agente de desenvolvimento local. [...]
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Phoenix, Casey J. (Casey John). "Lean implementation across value stream in main rotor blade area." Thesis, Massachusetts Institute of Technology, 2007. http://hdl.handle.net/1721.1/39692.
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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 Civil and Environmental Engineering; in conjunction with the Leaders for Manufacturing Program at MIT, 2007.Includes bibliographical references (p. 61).
The primary goal for this project was to help expand the existing capability of Sikorsky's main rotor blade business from raw material (titanium) through final assembly. The project helped to facilitate the ongoing lean transformation as the factory makes the journey to single-piece flow. During the internship, monthly kaizen events were used to help focus efforts on different areas of the value stream. These activities resulted in changes in the following areas: decrease in cycle times and lead times, reduction in inventory, procedural changes, and a future plan to physically change the factory floor to improve flow.
by Casey J. Phoenix.
S.M.
M.B.A.
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Sluše, Jan. "Optimalizace sinusového čerpadla." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2012. http://www.nusl.cz/ntk/nusl-230388.
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The aim of the diploma thesis is to design the technical solution of minimization of frictional losses, which occur when using a sine pump at position of the shaft locking and on the impeller wheel. The losses originating from the frictional forces have a negative influence on the lifetime of individual parts and economy of the pump. In the first part the author describes sine pumps from the constructional point of view and the main producers are mentioned. The second part contains suggestions on the parameters of the pump and various possibilities of solutions. The last part covers the experiment and conclusions.
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Lopes, Marco Alexandre Gameiro. "Reconstituição da rotura da barragem das minas da Fonte Santa: análise do transporte sólido no vale a jusante." Master's thesis, Faculdade de Ciências e Tecnologia, 2012. http://hdl.handle.net/10362/8653.
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Dissertação para obtenção do Grau de Mestre em
Engenharia CivilNa presente dissertação estudam-se, com recurso à modelação numérica, as alterações morfológicas ao longo do vale a jusante da barragem das minas da Fonte Santa decorrentes da rotura desta, ocorrida a 27 de novembro de 2006. Para este efeito utilizou-se como base de dados o hidrograma da onda de cheia resultante da rotura da barragem bem como dados de um levantamento de campo realizado após o incidente, nomeadamente a granulometria do material sólido depositado no leito, estimações de volumes de erosão e deposição ao longo do vale e a geometria deste, antes e após o incidente. O objetivo do trabalho de modelação matemática é a obtenção da simulação que mais se aproxima aos dados obtidos pelo levantamento feito pouco tempo após o incidente, por intermédio de uma calibração adequada do modelo, para que os efeitos da rotura ao longo do vale, incluindo as alterações morfológicas ao longo do tempo, possam ser reproduzidos e analisados. As simulações computacionais para o estudo foram feitas com recurso ao programa computacional HEC-RAS, anteriormente calibrado para a presente situação de cheia extrema, recorrendo-se a diferentes fórmulas de transporte sólido. Uma vez que o material constituinte do corpo da barragem juntamente com as lamas depositadas a montante desta foram transportados para jusante, foi necessário criar um hidrograma de sedimentos, de forma a ser considerado na simulação como condição de fronteira de montante. A granulometria dos sedimentos ao longo do vale foi caracterizada de diversas formas, de acordo com as possibilidades oferecidas pelo programa HEC-RAS. Analisando os resultados verificou-se que, das fórmulas de transporte testadas, a que melhor simulou o transporte sólido ao longo do vale foi a fórmula de Yang. Estes resultados apresentaram uma configuração na relação erosão/deposição de massa de sedimentos ao longo do vale, próxima do esperado. No entanto, os resultados quantitativos obtidos não foram muito próximos do que era previsto. Crê-se que as diferenças registadas relacionam-se com a falta de informação adequada da granulometria de todo o material envolvido no estudo, particularmente, a do leito do rio, com a inadequação do modelo construído para simular a fenomenologia, devendo ainda considerar-se a incerteza associada aos dados do levantamento do terreno.
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Calazans, Marcos Moraes. "Ciência semicolonial: uma análise da cientificidade do conflito gerado pelo crime semicolonial Samarco/Vale/BHP." Doctoral thesis, Universidad de Alicante, 2019. http://hdl.handle.net/10045/91109.
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Tres años han pasado desde la ruptura de la represa de Fundão en Mariana-MG, la mayor catástrofe de la historia de la minería en el país y la mayor catástrofe mundial en la que están involucradas represas. Hasta ahora, la inmensa mayoría de los daños causados a los antiguos habitantes de los distritos de Bento Rodrigues, Paracatu de Baixo y Gesteira, los cuales perdieron seres queridos, casas, propiedades y pertenencias, no han sido reparados. Según el pronóstico de los órganos públicos implicados, la reconstrucción de las comunidades devastadas por el mar de lodo de Samarco, ni siquiera iniciada, llevará años. Las familias afectadas, ubicadas en casas alquiladas por la empresa y con parca ayuda financiera, siguen sufriendo la prolongación continua del daño.
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Suciu, Constantin. "Switch mode emulation of large value capacitors in the rotor circuit to improve the induction motor performance." Thesis, Nottingham Trent University, 2000. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.314331.
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Lavandoski, Joice. "A paisagem na Rota Enoturística Vale dos Vinhedos (RS), na perspectiva do visitante." reponame:Repositório Institucional da UCS, 2008. https://repositorio.ucs.br/handle/11338/307.
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O Vale dos Vinhedos, localizado no Rio Grande do Sul, pode ser visto como um destino enoturístico consolidado, mas que pode agregar outros atrativos, mediante o desenvolvimento e o planejamento de atividades relacionadas à sua paisagem, já que o enoturismo não consegue se desenvolver em sua plenitude, se não levar em consideração o valor paisagístico de determinada região. Esse estudo teve como propósito identificar qual a importância da paisagem para quem visita a Rota Enoturística Vale dos Vinhedos. Sendo um estudo de caso exploratório-descritivo, utilizou-se, para a coleta de dados, um instrumento na forma de entrevista semi-estruturada de caráter quali-quantitativo que foi testado e adequado à pesquisa ao longo de três aplicações. A amostragem contemplou 100 (cem) visitantes da Rota Enoturística Vale dos Vinhedos, buscando identificar: o perfil desses visitantes, suas motivações, os atrativos que chamam atenção e sua percepção quanto à paisagem local. A pesquisa revelou que o perfil dos visitantes são pessoas com nível de escolaridade superior, que viajam acompanhados da família e com motivações ligadas ao vinho, pois 70% desses visitam apenas as vinícolas da região. Verifica-se que a paisagem chama muito a atenção do visitante, sendo um fator motivador, relacionado diretamente ao vinho e, em conjunto com ele, traduz a identidade do Vale dos Vinhedos. Os parreirais foram, na percepção da paisagem, o que mais chamou a atenção dos visitantes, representando 40% da amostragem, e esses se referem, a esta paisagem, como sendo natural. Porém, a paisagem da região é culturalmente modificada pela ação do homem, pois a partir da chegada dos imigrantes italianos em 1875, ela vem sendo alterada. Outros elementos que compõem a paisagem, além dos parreirais, e que foram identificados pelos visitantes, compreendem as vinícolas, a vegetação, a arquitetura das casas antigas e, com isso, o modo de vida local. Os resultados evidenciam que a paisagem da região é um fator motivador e, por sua vez, é um atrativo turístico, especialmente pela presença dos parreirais no design paisagístico local. Identifica-se que os atrativos turísticos ligados a uva e ao vinho podem ser melhor explorados a fim de incrementar a oferta turística, havendo uma melhor integração da paisagem como recurso turístico e, conseqüentemente, contribuindo para sua preservação.Submitted by Marcelo Teixeira (mvteixeira@ucs.br) on 2014-05-20T19:50:57Z No. of bitstreams: 1 Dissertacao Joice Lavandoski.pdf: 1718697 bytes, checksum: c65365376f5501b86eaf70535477ae37 (MD5)
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The Vale dos Vinhedos can be seen as a consolidated wine turistic destination, but may add other attractions, through the development and planning activities related to its landscape since the enoturism cannot develop itself in its fullness, if not take into account the landscape value of a particular region. This study had the purpose of identifying which is the importance of the landscape for those who visit the Vale dos Vinhedos Wine Turistic Route. Being an exploratory-descriptive case study, it was used for data collection, an instrument of semi-structured interview in a quality and quantity nature that was tested and adapted to search over three aplications. The sample included 100 (one hundred) visitors from Vale dos Vinhedos Wine Turistic Route, seeking to identify: the profile of these visitors, their motivations, the attractions that draw attention and their perception about the local landscape. The survey revealed that the profile of visitors are people with higher level of education, who travel with their family and with motivating factor directly related to wine and, together with it, reflects the identity of the Vale dos Vinhedos. The trellised vines were, in the perception of the landscape, what drew the most attention from visitors, representing 40% of the sampling, and these say that they are a natural landscape. But the landscape of the region is culturally modified by the action of man, because from the arrival of Italian immigrants in 1875, it has been tailored. Other elements of the landscape, besides the trellised vines, which were identified by visitors, includes winery, vegetation, the architecture of old houses and, thereby, the local way of life. The results showed up that the landscape of the region is a motivating factor and because of this is a tourist attraction especially for the presence of the trellised vines at the local design landscape. It is conclude that the tourist attraction connected to the grape and wine could be better explored to increase the tourist offer, having a better integration from the landscape like tourist resource and, consequently, contributing to its preservation.
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Marques, Cláudia Brazil. "Economia do turismo no Vale dos Vinhedos - Bento Gonçalves - RS - 1990 a 2005." reponame:Repositório Institucional da UCS, 2007. https://repositorio.ucs.br/handle/11338/275.
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O turismo tem se apresentado como uma das mais importantes indústrias mundiais. Sua aplicação como instrumento de desenvolvimento econômico da localidade da Rota do Vale dos Vinhedos, no município de Bento Gonçalves, Rio Grande do Sul, Brasil. No Vale dos Vinhedos, a agricultura especializou-se em torno da viticultura e da vinicultura. A evolução da agricultura local produziu, ao longo do tempo, um processo de diferenciação social. As atividades praticadas pelos diferentes tipos de agricultores e de sistemas de produção presentes atualmente no Vale apresentam situações distintas tanto em termos de geração de excedentes econômicos quanto de sua repartição entre os agentes que participam de sua apropriação, provocando, por conseqüência, impactos diferenciados na dinâmica de desenvolvimento desse território. Em termos metodológicos, a pesquisa seguiu o procedimento exploratório descritivo de análise quali-quantitativa. O trabalho tem como questão central estudar o desenvolvimento da Rota do Vale dos Vinhedos no período de 1990-2005 e identificar os fatores vinho e turismo como propulsores da transformação da economia local. Inicialmente discute a evolução de cada atividade no cenário da economia: analisa os indicadores de participação da vitivinicultura e a seguir faz o contraponto com os indicadores no mesmo período do setor turístico com incidência no aspecto desenvolvimento na mesma perspectiva temporal. Os resultados indicaram que todos os tipos analisados apresentam margens de contribuição de valor agregado positivas, com destaque para os sistemas que envolvem a vinificação, o cultivo de uvas viníferas e o turismo.Submitted by Marcelo Teixeira (mvteixeira@ucs.br) on 2014-05-19T17:49:02Z No. of bitstreams: 1 Dissertacao Claudia B Marques.pdf: 877764 bytes, checksum: 9808cb727d81493f57def464b2aa256d (MD5)
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Tourism is known as one of the main industries in the world. It has been applied as an instrument of economic development in the Rota do Vale dos Vinhedos (Route of the Valley of Vineyards), in the municipality of Bento Gonçalves, state of Rio Grande do Sul, Brazil. In the Vale dos Vinhedos, agriculture has specialized in grapegrowing and winemaking (viticulture and viniculture). Over time, the evolution of local agriculture produced a social differentiation process. The activities currently practiced by different types of farmers and production systems in the Vale present different situations both in terms of generating economic surpluses and their distribution among the agents who participate in their appropriation, consequently causing different impacts on the dynamics of development of this theory. In methodological terms, research followed the descriptive exploratory procedure of qualitative and quantitative analysis. The central issue of the study is to look at the development of Rota do Vale dos Vinhedos during the 1990-2005 period, and to identify wine and tourism as factors that drive local economic change. It begins by discussing the evolution of each activity in the economic scene; it analyzes the indicators of participation of grape-growing and winemaking, and then establishes a counterpoint with the indicators for the tourism industry during the same period, affecting the aspect of development from the same temporal perspective. The results indicated that all the types analyzed presented positive added value margins of contribution, emphasizing the systems involving wine-making, grape growing and tourism.
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Brito, André Nozawa. "Aplicação de um procedimento usando preferência declarada para a estimativa do valor do tempo de viagem de motoristas em uma escolha entre rotas rodoviárias pedagiadas e não pedagiadas." Universidade de São Paulo, 2007. http://www.teses.usp.br/teses/disponiveis/3/3138/tde-27062007-183816/.
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Esta dissertação baseia-se na aplicação de um procedimento empírico envolvendo técnicas de preferência declarada para a estimativa do valor do tempo de viagem de motoristas em deslocamentos regionais, em um contexto de escolha entre rotas pedagiadas e não pedagiadas. Inicialmente é feita uma revisão das abordagens teórica e empírica sobre a valoração do tempo. São também revistos os conceitos básicos de outros dois elementos fundamentais na metodologia aqui utilizada: a teoria da escolha e técnicas de preferência declarada. Uma aplicação a um estudo de caso específico é feita usando informações coletadas em ampla pesquisa de preferência declarada, realizada em 2005 com motoristas de automóvel em diversos pontos da malha rodoviária do estado de São Paulo. O desenho experimental da preferência declarada envolvia três atributos: tempo de viagem por uma rota pedagiada, custo tarifário e tempo de viagem por uma rota não pedagiada. O conjunto das informações foi analisado e utilizado na obtenção de modelos de escolha discreta do tipo logit multinomial; os valores do tempo de viagem foram obtidos a partir dos coeficientes estimados em funções de utilidade aditivas e lineares nos parâmetros. Analisou-se também a variação do valor do tempo em função de características do motorista e da viagem, questão abordada através da estimação de diferentes modelos por segmentos da amostra e da especificação de funções de utilidade que incorporam variáveis dummies para representação das características analisadas. Os resultados indicaram, para a escolha específica estudada, valores de tempo médios de cerca de R$ 16/h, variando de R$12/h a R$23/h para diferentes segmentos de viajantes analisados. A duração da viagem foi uma importante característica associada a variações no valor do tempo, que decresceu na medida em que as durações aumentaram. Variações expressivas no valor do tempo de viagem foram também observadas para viagens a lazer, motoristas de renda familiar baixa e aqueles com alta posse de veículos.This dissertation is based on the application of an empirical procedure using stated preference techniques for the estimation of the value of travel time for drivers in regional trips, in the context of a choice between tolled and non-tolled routes. It first reviews the theoretical and the empirical approaches for the valuation of travel time and then presents the basic concepts of two other topics relevant for the methodology adopted: choice theory and stated preference methods. An application to a specific case study is then presented, using information from a stated preference survey conducted in 2005 with a large sample of car drivers intercepted at several points in the highway network of the state of São Paulo. The stated preference experimental design considered three attributes: trip time on a tolled route, value of toll and trip time on a non-tolled route. Survey data were analyzed and used for the estimation of discrete choice (multinomial logit) models; values of travel time were derived from estimates of coefficients of an additive linear in the parameters utility function. The specification of the models and the segmentation of the sample allowed the estimation of the variation of travel time according to some selected driver and trip characteristics. Results indicated, for the specific choice context analyzed, an average value of travel time of approximately R$16/h, varying from about R$12/h to R$23/h for different segments of travelers. Trip length was an important characteristic influencing the variation of the value of travel time, which declined as trip length increased. Other important effects were found for leisure trips, for travelers with low income and for those with high family car ownership.
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"A Numerical Study of a Rotary Valve Internal Combustion Engine." University of Technology, Sydney. Faculty of Engineering, 2001. http://hdl.handle.net/2100/248.
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A Computational Fluid Dynamics (CFD) simulation of the Bishop Rotary Valve (BRV) engine is developed. The simulation used an existing commercial CFD code, CFX 4.3, with a number of new routines written to allow it to simulate the conditions and motions involved in an internal combustion engine. The code is extensively validated using results from other researchers, and several new validations are performed to directly validate the code for simulating internal combustion engine flows. Firstly, tumble vortex breakdown during the compression stroke of a square piston model engine is modelled. The results of the simulation are validated against published high quality experimental data. Both two- and three-dimensional models are tested, using the k-e and Reynolds stress turbulence models. The Reynolds stress turbulence model simulations successfully predicted the tumble break down process during the compression stroke. A simple three-dimensional Large Eddy Simulation model is also presented. The numerical simulation is then applied to the BRV engine. An in-cylinder flow field not previously described is discovered, created by the unique combustion chamber shape of the BRV engine. The flow field is not adequately described by the traditional descriptions of engine flows, being squish, swirl and tumble. The new flow structure is named 'dual cross tumble', and is characterised by two counter-rotating vortices in the cross tumble plane on either side of the inlet air jet. Analysis of the dual tumble structure indicates that it is most beneficial in high bore to stroke ratio engines. This flow structure has been predicted or visualised by a small number of previous researchers, however no published research has recognised its significance or potential benefits. The validated code is then used to predict the effect of modifying the valve cross sectional area, the effect of the inlet manifold wave, the effect of heat transfer from the inlet manifold walls, the effect of bore to stroke ratio, and the effect of engine speed. This work presents a numerical simulation of a new rotary valve engine technology. This opens up a whole new area of engine aerodynamics research as no detailed examination of the flows in a rotary valve engine have been presented previously. In the process, it discovers a new compression stroke turbulence generation mechanism, 'dual cross tumble', which offers the potential of performance levels not possible using poppet valve engines.
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Yao, Jun, Chi-Hwa Wang, and Wee Chuan Lim. "Granular Attrition due to Rotary Valve in a Pneumatic Conveying System." 2004. http://hdl.handle.net/1721.1/7481.
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The rotary valve is a widely used mechanical device in many solids-handling industrial processes. However, it may also be responsible for most of the attrition effects occurring in a typical process. In this study, the attrition effects occurring in a rotary valve operating as a stand-alone device and as part of a pneumatic conveying system were investigated. In the former case granular attrition was carried out at three different rotary valve speeds and the experimental results obtained were found to be in good agreement with the Gwyn correlation. In the latter case three typical air flow rates were used in the pneumatic conveying system. The size distribution of the attrition product obtained at the lowest air flow rate used was not adequately described by the Gwyn correlation. The attrition process and mechanisms involved were analysed and the minimum size of the attrition product obtained from both modes of operations was found to be similar.Singapore-MIT Alliance (SMA)
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Huang, Ke-lun, and 黃克倫. "The Influence of the thickness of pump discharge valve on the performance of Rotary Compressor." Thesis, 2014. http://ndltd.ncl.edu.tw/handle/8zeedr.
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碩士國立中央大學
機械工程學系在職專班
102
Mollier chart of R410A refrigerant is used to obtain the corresponding theoretical suction temperatures, discharge temperatures, densities and pressures at different working conditions. Then the corresponding volumes and pressures at different crank angles are calculated based on its thermodynamic properties. ANSYS is used to simulate the valve displacement of the rotary compressor under different operation processes. Under the fix of valve material mechanical properties (density, Young's modulus and Poisson's ratio) and top flange parts, by changing the valve thickness only, the instantaneous valve displacement and the compressor performance caused by the difference between internal and external pressures of the compressor chamber. Simulation shows that the displacement of 0.305mm valve is lower by 4.1% compared with that of 0.25mm valve under the same pressure loading. The experimental test verifies that 0.305mm valve increases the energy efficiency ratio EER (Energy Efficiency Ratio) by 1.8%. The simulated and experimental results are consistent each other.
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Liao, Sen-hsi, and 廖森禧. "The Study of Rotary Club''s Operation and its Societal Value-Example of Taiwan''s Rotary Club." Thesis, 2007. http://ndltd.ncl.edu.tw/handle/89256057224011138228.
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碩士逢甲大學
經營管理碩士在職專班
95
Rotary Clubs is established so far , there are about 1.2 million members（Rotarians） belonging to the club in over 200 countries and about thirty-two thousand geographical areas. The International Rotary Clubs in Taiwan occupies seven areas. Rotary Clubs in every areas in the whole world has a common basic idea-Caring about others, helping others. That is to say the idea of serving. For probing into social value of Rotary Clubs, the thesis regards every Rotary Clubs and people in 3460 areas of International Rotary Clubs in Taichung county/city in Taiwan as the range; Regards all staff and members of every Rotary Clubs in dividing areas, Taichung county/city, Taiwan as the target. The study is focused on understand the cognition of Rotary Clubs’ organization and its operation that regards every Rotary Clubs and people in Taichung county/city. The member of a organization how to overcome that possible encounter bind at organizational operation. The self-identity at the member of a organization、the contribution and affection of society while Rotary Clubs is established. The thesis is divided into five chapters altogether, follow the exposition: Chapter one is the introduction: Prove the motive, purpose, structure and procedure of studying in thesis. Define the range of studying and approach of researching. Chapter two for studying retrospect Mainly appear Rotary Clubs organize operation, enterprise organize community responsibility and Rotary clubs social value relevant. Chapter three takes management and administration of Rotary Club of Taichung Science Park as an example to understand mission that Rotary Clubs organize and wish the scene, organize structure, organize structure, organization. Chapter four for probing the value of Rotary Clubs’ members, understand that the position of service on Rotary Clubs、the model of value and theory on Rotary Clubs’ members and the similarities and dissimilarities on Rotary Clubs and Tzu Chi. Chapter five is conclusion and advice of the thesis. Making statistics , according to the result of survey for questionnaire. Induct and cast the conclusion of studying in thesis and administer earnestly advice to Rotary Clubs.
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CHOU, YT-MIN, and 周伊敏. "The Study of Personality Traits, Work Value, and Social Capital for Non-profit Organization - An Example of the International Rotary Club." Thesis, 2010. http://ndltd.ncl.edu.tw/handle/32025048635639488280.
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碩士國立高雄應用科技大學
企業管理系碩士在職專班
98
Non-profit organizations involving heavily in public affairs flourish in Taiwan that benefit People living in consequence in recent years. Social capital opinions have been gradually popular among scholars who are from different academic community to put in the search sequentially. This project is based on the social capital perspective to discuss different personality traits and effect of work values of Non-profit members and establish the reliance and norm. The main purpose of project is discussing the influence and diversity of personality, work value and demographic statistics in non-profit organization on social capital and take participates motive as variable adjustment to discuss the affect on personality, work value and social capital in non-profit organization. The framework proposes the conceptive research construction and analyzes the result by applying structure equation pattern. Rotary International District 3510 members are being searched by the questionnaire of project. Total surveys are 264 pieces, and 168 valid questionnaires are returned. The result shows 1. Personality traits have a significant impact on the work values, 2. Personality traits indirectly affect the social capital through work values. 3. Work value has a significant impact on social capital. 4. Personality and social capital can be adjusted by Moderating variable for joining the non-profit organization 5.Tthe work values and social capital also can be regulated by joining the non-profit organization. 6. The majority number in non-organization is males who are married man over fifty years old working as successful businessman more than eleven years in society. 7. Education background obviously does not affect in social capital。8. The motive adjustment of Non-Profit organization member also affects obviously in social capital.
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KAO, SHU-CHIN, and 高淑錦. "The influence of Learning Attitude and Working Value on JobIntention-The Case of Senior High School Rotary CooperativeEducation Students in Hospitality Major in Central Taiwan." Thesis, 2016. http://ndltd.ncl.edu.tw/handle/kue68h.
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碩士朝陽科技大學
休閒事業管理系
104
This research study is regarding to the impacts among the learnging attitude, working value, and the employment pursuit of the vocational school student who is involved into the Rotary Cooperative Education in Hospitality. The majority reference of this study is gatherred from the student groups in the Central part of Taiwan. The first step is generating the surveys, and the effective feedback ratio is 78% out of totally 300 survey reports collected. Second, the statistics data is tested with SPSS (Statistical Package for the Social Sciences) software in Windows 21.0 version. Data analysis is the last step but not the least. The analyzing technique includes the Descriptive Statistics, the Factor Analysis, the Reliability Analysis, the T-test, the One way ANOVA (Analysis of Variance), the Correlation Analysis, and the Regression Analysis. The main discovery of this research and analysis is that study motivation and working hours based on individual’s background have the significant impacts on learning attitudes and work values. Study motivation essentially shapes the learning attitudes, and working hours considerably forms the work values. Other elements in individual’s background do not have obvious effects on them. Besides that, the learning attitude of students who take Rotary Cooperative has significant relevance to work values and future employment wills. And the former determines the latter. On the other hand, the work values and the learning attitude of these students can reflect their future employment wills directly. According to the result of this research, there is no doubt to advise Cooperative Education Students to accumulate their educations as well as pursue practical experience, which is useful to their future employment. However, the progress of Rotary Cooperative learning will be different from one-way learning. Therefore, every student should consult their initiators more often during the intern period to adapt and learn smoothly.
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CHANG, KENG-HAO, and 張耿豪. "Apply Soft Computing to Analyze C/P Value in Quad-Rotor Unmanned Aerial Vehicle." Thesis, 2018. http://ndltd.ncl.edu.tw/handle/sa47mn.
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碩士建國科技大學
電機工程系暨研究所
106
The unmanned aerial vehicle developments has been for many years, but are used in general, until 2001, the United States encounter 911 terrorist attacks. The world started unmanned aerial vehicle application front-end technology makes subsequent competition for research and development. Due to technological advances, coupled with the successful development of modular system, making unmanned aerial vehicle’s weight, size and price are greatly reduced in recent years, and the surge in the number of both commercial and amateur player. The application has also been innovation, from the initial defense industry and evolved into the field for agriculture and fisheries, livelihood, police and disaster investigation. In this paper, the six common of quad-rotor unmanned aerial vehicle with the body size of the diagonal distance of the motor between 350 mm to 450 mm, on its stability, photographic quality, safety, endurance, portable, friendly using, transfer distance and price total of eight factors. First use grey relational grade to explore and arrange the C/P value of six kinds of quad-rotor unmanned aerial vehicle. And uses regression analysis to find out the correlation among the influence factor in the six kinds of quad-rotor unmanned aerial vehicle, finally, uses rough set method to find out the core to provide beginners and the study of the amateur players reference when there are buying.
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Chen, Hong-Ting, and 陳鴻霆. "The Influence of Personality Traits and Work Value toward Major in Food and Beverage Management of Senior High School Rotary Cooperative Education Students’ Willingness into Hospitality Industry in Current New Taipei City." Thesis, 2013. http://ndltd.ncl.edu.tw/handle/83454895538795696634.
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碩士中國文化大學
生活應用科學系
101
英文摘要 The purpose of the research is to investigate what affect the personality traits and work value have on the willingness into hospitality industry. The subjects of students were grades 2 and 3 students studying in the Department of Food & Beverage of S School under rotary cooperative education program in Current New Taipei City. The study methods were literature analysis and questionnaire. There were 521 questionnaires sent out and 521 taken back. The retake rate of valid questionnaires was 100 %. The research method for example, descriptive distribution, T-test analysis, One-way ANOVA, Pearson’s correlation, and multiple regression analysis. The major conclusions of this study are as follows： 1. The different individual factors (like gender, grade of internship, department of internship, unit of internship) have made significant difference in personality traits, concept t of work value, and the willingness into hospitality industry. 2. The individual factors, personality traits, and work value had significant relationship with the willingness into hospitality industry. 3. The individual factors, personality traits, and work value had significant effect on the willingness into hospitality industry. The above inclusions can be shared with entrepreneur and concerning scholars. They also provide the basis of the future direction with concerning researchers. Keywords：rotary cooperative education program, personality traits, work value, willingness to work in hospitality industry
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Manuel, Cláudia Sofia Barão. "Projeto rotas do Tejo: contributo para a definição da Agenda Marítima da RLVT." Master's thesis, 2014. http://hdl.handle.net/10451/23045.
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O estágio realizado na Comissão de Coordenação e Desenvolvimento Regional de
Lisboa e Vale do Tejo (CCDR LVT) inseriu-se no projeto “Rotas do Tejo” como
contributo para a Agenda Marítima da Região de Lisboa e Vale do Tejo (RLVT), tendo
este uma visão para o desenvolvimento turístico da região em causa.
O turismo como setor económico tem vindo a se destacar como principal fonte de
rendimento de várias regiões, aproveitando principalmente os recursos naturais
existentes. O forte investimento neste âmbito apesar de vantajoso para os locais em
causa, tornou-se no entanto uma ameaça para o ambiente, visto que o seu
aproveitamento nem sempre se realizou de uma maneira sustentável.
Apresenta-se assim neste relatório o potencial turistico da região, com um estudo
específico sobre o levantamento de informação das zonas ribeirinhas de nove
municípios do Vale do Tejo, interligando este trabalho com os objetivos do
desenvolvimento sustentável. Sendo da CCDR a dinamização desta área, as tarefas
propostas foram realizadas nas seguintes etapas: pesquisa de informação relativa às
políticas europeias e nacionais sobre o mar, águas interiores, ambiente e turismo;
recolha e análise dos dados relativos à RLVT; elaboração de possíveis linhas de atuação
e ações a desenvolver; propostas de fontes de financimento.
Para uma melhor perceção da área indicada para o caso de estudo efetuou-se um
levantamento e organização da informação disponível, colocando esta em tabelas
descritivas seguido de uma análise da realidade local. Com esta tarefa foi possível
efetuar uma proposta de fontes de financiamento, compatíveis com os fundos
financeiros, europeus e os nacionais.
O presente relatório pretendeu assim compreender o que se tem feito na área das ações
ligadas ao mar e águas interiores, a nível europeu e nacional, como forma de aplicar as
diretrizes europeias estudadas ao longo do mestrado, ao trabalho efetuado durante o
estágio na instituição acima referida. A relação entre o turismo e o ambiente permitiu a
criação de ações sustentáveis que poderão ser concretizadas com o menor impato
possível sobre a área de estudo.The intership at the Comissão de Coordenação e Desenvolvimento Regional de Lisboa e Vale do Tejo (CCDR LVT) was inserted in the "Rotas do Tejo" project as a contribution to the Region of Lisboa e Vale do Tejo’s (RLVT) Maritime Agenda, with a vision for tourism development in the concerned region. Tourism, as an economic sector, has come to stand out as the main source of income in many regions, taking advantage of its natural resources. The significant investment in this field despite advantageous for the locations in question, became a threat to the environment, since its use was not always made in a sustainable way. Thus appearing in this report is the region’s potential for tourism; with a specific study on the survey information about the coastal areas of nine municipalities of Vale do Tejo, linking this research with sustainable development goals. The objective of the internship concerned boosting this particular area, therefore, the proposed tasks were performed in the following steps: searching for information on the European and national policies regarding the sea, water, environment and tourism; collection and analysis of data relating the RLVT; elaboration of possible lines of action and actions to be undertaken; recommending financial sources. For a better awareness of the area proposed for the case study, a survey and gathering of information were performed, organizing the latter in descriptive tables followed by an analysis of the local reality. When designing this data it was possible to make a proposal for funding sources, compatible with European and national funds. This report seeks to understand what measures have been takenrelated to the sea and inland waters, bothat European and national levels, in order to implement EU directives learned during the Masters’ degree, to the work done during the intership at the instituitionabove mencioned. The relationship between tourism and the environment led to the creation of sustainable actions that could be implemented with the lowest possible impact on the area of study.
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Bilé, João Pedro Filipe Bilé, and Mateus Rodrigues costa Teixeira. "Rota do azulejo: strategic analysis of the business ecosystem and value creation in the touristic tile art market." Master's thesis, 2019. http://hdl.handle.net/10362/68974.
Full textAbstract:
This project is composed by a strategic analysis of the business ecosystem and value creation for the implementation of a touristic route. The main purpose was to construct theoretical frameworks for the analysis of the networks and value creation in tile tourism, enabling the analysis of a possible “Rota do Azulejo”. The project states that relations inside the network are crucial and underlines the importance of stakeholders in the creation of value. This thesis constitutes a theoretical and critical analysis of the strategic viability of a touristic route, laying the foundations for the development of further analysis and projects
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Martins, Luís Filipe Correira. "Rota do papel do Vale do Ceira e Serra da Lousã : a fábrica de papel do Boque." Master's thesis, 2010. http://hdl.handle.net/10316/14253.
Full text
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Wang, KeSheng. "Vibration monitoring on electrical machine using Vold-Kalman filter order tracking." Diss., 2008. http://hdl.handle.net/2263/27613.
Full textAbstract:
Conventional rotating machine vibration monitoring techniques are based on the assumption that changes in the measured structural response are caused by deterioration in the condition of the rotating machine. However, due to changing rotational speed, the measured signal may be non-stationary and difficult to interpret. For this reason, the order tracking technique was introduced. One of main advantages of order tracking over traditional vibration monitoring techniques, lies in its ability to clearly identify non-stationary vibration data, and to a large extent exclude the influences from varying rotational speed. Several order tracking techniques have been developed and researched during the past 20 years. Among these techniques, Fourier Transform Based Order Tracking (FT-OT), Angle Domain Sampling Based Order Tracking (AD-OT) and Vold-Kalman Filter Order Tracking (VKF-OT) are the three most popular techniques and have been commercialised in software. While the VKF-OT is comparatively new, and both its theory and application are different from the other two techniques, the unique advantages of this technique has led to increased research attention in this field. This growing interest in research on the application of the VKF-OT technique on real machines, and its comparative advantages with respect to other order tracking techniques, inspired the present research. With this work, a comprehensive literature of electrical machine condition monitoring was surveyed, which gives a broad perspective of electrical machine monitoring methods ranging through electrical techniques, vibration techniques, temperature techniques and chemical techniques. To simply the process of applying VKF-OT in initial investigations, simulated single-degree-of freedom and two-degree-of freedom rotor models were established, and the application of the VKF-OT technique on these simulated models was explored. Because most of the current research draws significantly on an understanding of the VKF-OT theory, it was also necessary to review and summarize the current status of VKF-OT theory from previous work, as well as explore the procedures for selection of its filter bandwidth when dealing with real data. An experimental set-up for monitoring an electrical alternator was constructed. Real experimental data were subsequently used to compare the advantages and disadvantages of the three popular order tracking techniques. The unique time domain advantage of VKF-OT was implemented, using crest factor and kurtosis values as indictors of the fault condition of the machine. This gave encouraging results.Dissertation (MSc)--University of Pretoria, 2008.
Mechanical and Aeronautical Engineering
unrestricted
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Sá, Sofia Andreia Carneiro de. "Turismo arqueológico: um projeto de valorização da arte rupestre no vale do Lima." Master's thesis, 2015. http://hdl.handle.net/1822/40716.
Full textAbstract:
Dissertação de mestrado em Património e Turismo CulturalO Turismo Cultural tem vindo a ser alvo de maior procura por parte dos visitantes/turistas de forma a ocupar os seus tempos de lazer. A esta procura junta-se ainda outros elementos importantes de cada região, nomeadamente o artesanato, a gastronomia, a paisagem. Neste caso de estudo, vale do Lima, verifica-se uma grande riqueza de património cultural e ambiental. Contudo, é na arte rupestre (de tradição esquemática e de arte atlântica) que se denota uma maior fragilidade no que diz respeito à sua valorização. Neste sentido nasce a arte rupestre como recurso turístico visando o desenvolvimento do turismo regional e consequentemente aumentar as receitas internas. Esta dissertação conta com a criação de quatro percursos, essencialmente em meio rural, que se inserem na «Rota da Arte Rupestre do Noroeste». Para a sua concretização o trabalho foi dividido em três momentos: trabalho inicial de gabinete, onde foram consultadas fontes secundárias e fontes cartográficas; o trabalho de campo que deu lugar à prospeção arqueológica e, por fim, o trabalho avançado de gabinete onde foram reunidas todas as informações, criadas análises SWOT e desenhado o planeamento e implementação dos percursos. Todos os percursos podem ser feitos de diferentes modos de locomoção, contudo, promove-se o pedestrianismo que representa uma oportunidade de desenvolvimento económico sustentável no meio rural. Os principais objetivos deste trabalho passam por transformar a arte rupestre num produto do turismo cultural, interligando os locais já valorizados com outros locais, contribuindo assim para a diversidade dos produtos turísticos na região, contribuir para a criação de produtos sustentáveis, prolongar a estadia dos turistas no vale do Lima e contribuir para o desenvolvimento local e regional ao nível económico, social e cultural. A «Rota da Arte Rupestre do Noroeste», além da memória e identidade local possibilita, através das suas parcerias, a descoberta do património arqueológico e imaterial.
The cultural tourism has been greatest demand by tourists as way to takes up their spare times. At this demand connect other important elements of each zone including handicraft, gastronomy, landscape, among others. In this case study, the Lima valley, we examined a great wealth of cultural and environmental heritage. However is in the scope of Schematic and Atlantic Rock Art that we developed this work. In this way Rock Art arise as touristic resource here set up as way to developing the regional tourism and as a result improve internal revenues. This project includes creation of one route, essentially in rural areas, that form the «Rock Art Route of the Northwest». For this to materialize the work was divided into three stages: initial work office, where secondary sources and cartographic sources were consulted; fieldwork that led to the archeological exploration, and finally, the advanced working office where they were gathered all the information, created SWOT analysis and drawn the planning and implementation of the courses. In this route we create four pedestrian paths. All paths can be made by different ways of locomotion and are associated to hiking which, represent an opportunity for sustainable economic to develop in rural areas. The main objectives of this study undergo transform the rock art in a cultural tourism product by linking the sites already valued by other sites, thereby contributing to the diversity of tourism products in the region, contributing to the creation of sustainable products, to extend the stay of tourists in the valley of Lima and contribute to local and regional development at the economic, social and cultural level. The "Route”, as well as memory and local identity, enables the discovery of archaeological and intangible heritage.