Dissertations / Theses on the topic 'Transportör'
Create a spot-on reference in APA, MLA, Chicago, Harvard, and other styles
Consult the top 50 dissertations / theses for your research on the topic 'Transportör.'
Next to every source in the list of references, there is an 'Add to bibliography' button. Press on it, and we will generate automatically the bibliographic reference to the chosen work in the citation style you need: APA, MLA, Harvard, Chicago, Vancouver, etc.
You can also download the full text of the academic publication as pdf and read online its abstract whenever available in the metadata.
Browse dissertations / theses on a wide variety of disciplines and organise your bibliography correctly.
Larsson, Marcus. "Transportör : Lokal logistik." Thesis, Karlstads universitet, Avdelningen för maskin- och materialteknik, 2012. http://urn.kb.se/resolve?urn=urn:nbn:se:kau:diva-14875.
Full textNordström, Emil, and Marcus Forsberg. "Transportör till portabel käftkross." Thesis, Luleå tekniska universitet, Institutionen för teknikvetenskap och matematik, 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-70613.
Full textEinarsson, Anders, and Hans Gunnarsson. "Omkonstruktion/nykonstruktion av delar till transportör för sophantering." Thesis, University West, Department of Technology, 2003. http://urn.kb.se/resolve?urn=urn:nbn:se:hv:diva-837.
Full textFuru, Micke. "Konstruktion av vertikaltransportör för materialhantering." Thesis, Linköpings universitet, Maskinkonstruktion, 2012. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-85069.
Full textRotab Rostfria Transportörer AB manufactures and develops equipment for handling of materials and goods. The company also provides complete solutions for the handling of materials and goods, these solutions often consist of conveyors and equipment for packaging. The goal of the thesis is to design a vertical conveyor which is intended to transport goods from one conveyor to second conveyor located at another elevation. The vertical transportation must be variable between 1000 and 3000 mm above the floor. The conveyor must avoid the two major disadvantages that are common amongst competing products, these are often space consuming and/or use synchronized chains. The vertical conveyor is based on a conceptual idea developed at the company. In the thesis work, the idea is developed into a prototype with the aid of product development methodology. The product development process is divided into several phases, starting with a problem defining phase. After the first phase the required features are defined, the features are used as support for the development of several concepts. One of the concepts is chosen for further development. The chosen concept is the base for the design of the prototype. The finished prototype is evaluated. At the end of the thesis work a digital prototype has been designed using the CAD (Computer Aided Design) software SpaceClaim. The prototype is designed to handle goods with the following dimensions ( length x width x height) 400x400x300 mm and also with a mass up to 20 kg. It is powered by an electrical gear motor with a power output of 0.55 kW. The lowest possible pickup height is 800 mm above the floor level. The highest unloading height for the prototype is 3490 mm above floor level; it is possible to increase the unloading height in order to achieve 3000 mm. The rate of transports is 39.5 transports every minute. The prototype is a good choice for vertical transportation of goods in the same dimensions as described above. It is not as well suited for transportation of smaller goods. The prototype should be used when the vertical transportation is required to be achieved in a short horizontal distance. If the available horizontal space is sufficient for an angled conveyor to be used, a conveyor of that type should be used instead. Since an angled conveyor has higher capacity for transportation, an simpler design and is cheaper than the prototype.
Nydahl, Oskar. "Autotuning of a vacuum conveyor." Thesis, KTH, Maskinkonstruktion (Inst.), 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-180883.
Full textDen moderna industrin möter ständigt nya krav på ökad effektivitet. Dessa förbättringar kan komma utifrån tillämpning av ny teknologi eller bättre utnyttjande av befintlig teknologi eller en kombination. Idag när en vakuum transportör installeras finjusteras den manuellt för att uppnå önskad prestanda och hanteras därefter ofta inte bortsett från underhållsarbete. Detta i kombination med svårigheten att justera ett system så att det går effektivt och robust samtidigt som en god kapacitet upprätthålls föranleder slutsatsen att många system ute i industrin inte presterar optimalt. Målet med detta examensarbete var därför att utreda möjligheten att skapa en automatisk system inställare samt utvärdera de möjliga fördelarna och nackdelarna. Arbetet har undersökt två huvudkomponenter i en sådan automatisk system inställare, system design och optimerings strategi. System design var vital för att tillåta styrning och monitorering av systemet och optimeringsstrategi för att tillförlitligt kunna prestera goda resultat trots skiftande beteende med olika material i systemet. Baserat på detta utvecklades en laboratorie-utrustning som övervakade kapacitet, effektivitet, robusthet och försiktighet i varje transportcykel. Denna information nyttjades sedan i en evolutionär algoritm baserad på differentierad evolution för att finna de optimala system-inställningarna. Arbetet indikerar att ett sådant system skulle erbjuda prestanda-fördelar både i driftsättande och kontinuerliga driften av en vakuum-transportör. Den föreslagna automatiska systeminställaren kan anpassas till en stor mängd material och skilda krav på önskat driftläge för systemet. Tiden för att optimera systemet så att de större variationerna i prestanda uppnås är jämförbar med en mänsklig operatör menkan fortlöpa över tiden och ständigt söka förbättringar på ett sätt som ej är möjligt för en mänsklig operatör.
Tham, Henrik, and Caroline Mogard. "Affärsmodellspåverkan vid införande av HCT i Sverige : Implikationer för fordonstillverkare vid förändrade villkor för styckegodstransporter." Thesis, KTH, Industriell ekonomi och organisation (Inst.), 2014. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-147999.
Full textPurpose – The purpose of this study is to increase the knowledge about how legislative changes affect the business model of vehicle manufactures by studying a future allowance of HCT in Sweden. HCT, High Capacity Transports, is a generic term for trucks exceeding today’s weight and/or length regulations. Reasons for implementing HCT include reducing costs and environmental consequences. Method – Effects of legislative changes have been studied through a case-study of how HCT would affect the Swedish transport system. In order to study business model implications for both vehicle manufactures and hauliers, interviews have been held with transport buyers, hauliers and drivers within long distance haulage of break bulk cargo. This has been complemented by continuous contact with the commissioning vehicle manufacturer and participation in HCT conferences. Findings – Findings indicate that there will be no major modal shift between railway and road since the railway infrastructure determines the modal choice and is unaffected by HCT. Furthermore findings show that vehicle manufactures risk to sell fewer vehicles in case of HCT allowance but a business model adaption can increase the value per vehicle. This can be achieved by reducing customer operating costs, increasing vehicle uptime and being the voice of the customer against authorities. Practical implications – The study has resulted in a HCT business model framework for vehicle manufactures. The framework shows that all present value areas should be included in a future business model and that several areas will increase in importance. In the effect of new conditions several areas will become more difficult to fulfill. Furthermore new areas will be added. Theoretical implications – This study expands current theories within business model changes by increasing knowledge about how legislative changes affect business models. Furthermore this study highlights the importance of studying the whole supply chain in the event of these changes. The reason for this is that legislations affect the conditions for several players with strong peer relationships. Thereby effects due to changed legislations will spread to other players in the chain.
Jaržemskis, Andrius. "The research of the influence of logistical factors on transport flows distribution." Doctoral thesis, Lithuanian Academic Libraries Network (LABT), 2004. http://vddb.library.lt/obj/LT-eLABa-0001:E.02~2004~D_20041216_141558-30742.
Full textPasaulio ekonomikos augimas, spartėjantis globalizacijos procesas, technologijų pažanga didina atstumus tarp žaliavų gavimo, gamybos ir pagamintų prekių vartojimo taškų. Lietuva tapusi Europos Sąjungos nare, tampa Europos Sąjungos buferine zona prekybiniams mainams su Rytų Europos ir Azijos šalimis. Lietuvos transporto sistemą būtina pritaikyti esamiems ir potencialiems tarptautiniams krovinių srautams aptarnauti. Transporto srautų formavimosi išorinių veiksnių nustatymas ir įvertinimas Lietuvos transporto strategijoje gali suteikti šaliai didžiulį ekonominį potencialą.
Jaržemskis, Andrius. "Logistikos veiksnių įtakos transporto srautų pasiskirstymui tyrimas." Doctoral thesis, Lithuanian Academic Libraries Network (LABT), 2004. http://vddb.library.lt/obj/LT-eLABa-0001:E.02~2004~D_20041216_102159-77986.
Full textRelevance of the dissertation is determined by the object of research – the influence of logistical factors on transport flows distribution. The growth of world economics, business globalization, progress in technology skills extends the distances between geographical points of raw materials resources, manufacturers and consumers. Due to the membership in the European Union (EU) Lithuania has got new opportunities for international trade growth, and all the Eastern Baltic countries have become the buffer region for the EU trading with the countries of the Eastern Europe and Asia. A proper transport policy and infrastructure development would increase significantly the GNP in warehousing, transport and distribution sectors. Forecasting of potential transport flows according to logistical requirements of freight suppliers is most important for transport network optimization. Scientific problem. Contemporary transport engineering theory approaches the peculiarities of transport flows formation too narrowly, only as an analysis of internal factors determining freight flows. There is no analysis of external factors. Many researchers assume that transport flows are determined only by the existing transport network and its characteristics. Other researchers consider transport flows as a result of logistic elements only. The estimating of internal and external logistical factors provides a possibility to forecast the transport flows. Aim of the research is to create a model of... [to full text]
Botelho, Martinho Martins. "Desafios e possibilidades jurídicas para o desenvolvimento dos transportes no Mercosul: a opção pela multimodalidade." Universidade de São Paulo, 2010. http://www.teses.usp.br/teses/disponiveis/84/84131/tde-18122012-115432/.
Full textSince eighty years, economic agents have adopted an international transport regime more appropriated for operational costs reductions and facilities on contracting. This mixture of transport operation and specifics contractual aspects were named multimodal transport and were also used for strengthen regional economic integration on transports in economics regions. Some main preoccupations of international organizations e. g. UNCTAD, UNCITRAL, IMO, ICAO and international private entities e. g. ICC, IATA, IMC were fundamental to international society in playing the part of international commercial transport. In Southern Common Market regional plan this concern related to transport also was broached by establishing rules to multimodal transport as the model of Latin American Association of Integration on the Partial agreement to the facilitation of multimodal transport in Members States of Southern Common Market of 1994. The objective of this studying is to analyze challenges and legal limits established nowadays to the efficiency of multimodal transport on Southern Common Market since 1994 Agreement. It was evaluated some treaties related to multimodal transport regulation, legal regime of Ministers Agreement of 1996, ICC-UNCTAD Rules, national regimes of multimodal transport in Argentina, Brazil, Paraguay and Uruguay and the impact of new UNCITRAL Rotterdam Rules of 2009. Besides that it was evaluated the feasibility to multimodal transport in Southern Common Market integration. The main importance of this studying is to be an instrument of evaluation of the application of multimodal transport in Southern Common Market through regional legal rules. As conclusion it is perceptible the absence of harmonization on multimodal transport that prove an existence of a non propitious legal regime to eliminate or reduce regional integration costs through multimodal operations.
Oliveira, Daliana Damaceno Gil de 1972. "Implantação integrada de infraestruturas de transportes : Caso do rodoanel e ferroanel no trecho norte, em São Paulo." [s.n.], 2014. http://repositorio.unicamp.br/jspui/handle/REPOSIP/258372.
Full textDissertação (mestrado) - Universidade Estadual de Campinas, Faculdade de Engenharia Civil, Arquitetura e Urbanismo
Made available in DSpace on 2018-08-26T04:42:12Z (GMT). No. of bitstreams: 1 Oliveira_DalianaDamacenoGilde_M.pdf: 964791 bytes, checksum: 7035668583ec53d4289bd006d1fa2a90 (MD5) Previous issue date: 2014
Resumo: Os estudos de implantação do Trecho Norte dos empreendimentos Rodoanel e Ferroanel, com traçados próximos, pode potencializar e viabilizar uma série de ações conjuntas, como o compartilhamento das plataformas de terraplenagem em alguns segmentos, otimizando as interferências, drenagem, tratamentos de solos moles, contenções, obras de proteção ambiental, remanejamento de interferências, adequações funcionais dos sistemas viários lindeiros e áreas de apoio, além de procurar minimizar as necessidades de desapropriações e reassentamentos complementares aos previstos para o Rodoanel, reduzindo de forma significativa os custos em relação a hipótese dos empreendimentos a serem implantados independentemente. Este trabalho, utilizando como suporte metodológico o estudo de caso, estuda a integração dos modais rodoviários e ferroviários e a apresenta as alternativas das implantações nas formas isoladas e faz um comparativo da possibilidade de compatibilização das implantações das linhas férreas com a rodovia. E apresenta como resultado, uma opção para os problemas de infraestrutura de transporte no Brasil, a possibilidade de se pensar em uma integração na construção dos vários modais básicos
Abstract: The implantation studies of road and rail ring roads in São Paulo can enhance and facilitate a series of joint actions , such as sharing of earthwork in some segments platforms , optimizing interference , drainage, soft soil treatment , containment , protection works environmental , relocation interference , functional adaptations of the bordering road systems and support areas , and seek to minimize the needs of expropriation and resettlement complementary to that provided to the Beltway , significantly reducing costs in relation to the hypothesis of projects to be implemented independently . This work , using as methodological support the case study examines the integration of road and rail modes and presents alternative deployments in isolated forms and makes a comparison of the possibility of compatibility between implementations of the railways with the highway . And as a result has an option for the problems of transportation infrastructure in Brazil , the possibility of thinking about integration in the construction of several basic modes
Mestrado
Transportes
Mestra em Engenharia Civil
Andolfato, Daniele Marques. "Racionalização do transporte público por ônibus da cidade de Jaú." Universidade de São Paulo, 2005. http://www.teses.usp.br/teses/disponiveis/18/18137/tde-29052007-161607/.
Full textThis work focuses the urban collective public transportation system by bus of the city of Jaú. The main objectives of this work is to make a diagnostic of the system in terms of quality and efficiency and to present a plan in order to improve the quality and efficiency of the transit system. The main problems faced on the diagnostic were: inadequate space covering, overlapping of bus attendance, long headway between vehicles due to an exaggerate number of bus lines, absence of fare integration, deficient physical integration, low occupation of bus in non peak periods, bus traffic jam at bus stops due to inadequate schedule, huge delays in the central area due to traffic jam, lack of shelters at bus stops, etc. In the developed plan were proposed the following main actions: reorganization of the bus transit netword with reduction of the routes number and the elimination of overlapping of bus routes and the lacks of spatil covering service, reduction of the headway in the routes, implementation of a closed central station to promote physical and fare integration, pavement/rehabilitation of road pavement, improvement of system signs in bus streets, implementation of a rational operational programming, better distribution of the vehicles to the whole city; etc. In terms of efficiency, the main benefits of the proposed system are: fleet reduction 21%, total mileage reduction of 18% and operation cost reduction of 20%. Concerning to the quality, the main gains are: better space covering, small headway in the bus routes, travel time reduction, implementation of physical and fare integration, increase of the number of bus stops shelters, improvement of the rolling surface on bus streets, etc.
Gressler, Frank. "Efektyvus miesto transporto projektų finansų valdymas." Doctoral thesis, Lithuanian Academic Libraries Network (LABT), 2008. http://vddb.library.lt/obj/LT-eLABa-0001:E.02~2008~D_20080602_143257-53504.
Full textFinance management during implementation of urban transport projects is rather complicated because of insufficient financing and it needs coordination because of number of financial sources. The aim of the study – develop methods, algorithms and computer programs, which enable project mangers to solve finance management issues during all project phases. The main tasks to achieve the goals are: 1. To analyze financial issues and difficulties during implemented urban transport infrastructure’s projects, and to evaluate factors having influence on finance management during all project phases. 2. To evaluate influence of possible changes in project’s structure or part of the project on general project’s expenses. 3. To estimate, where it is possible to allocate various financial sources to separate project segments. 4. To develop algorithms and computer programs, which enable project mangers to evaluate economical, technical project works and its price. 5. Under insufficient financing or strict restrictions, the additional financing sources should be provided or extend of works should be decreased, part of these works relocated to further-coming projects.
Labanauskas, Gintautas. "Lietuvos sausumos transporto infrastruktūros prioritetinės plėtros investicijų pagrįstumo metodinis vertinimas." Doctoral thesis, Lithuanian Academic Libraries Network (LABT), 2010. http://vddb.laba.lt/obj/LT-eLABa-0001:E.02~2010~D_20100409_085210-16602.
Full textThis dissertation is analysing validity of investments into development of the land transport infrastructure in Lithuania. The fol-lowing main subjects have been researched: transport sector in Lithuania, the place of prioritized logistic centres and transport terminals within the transport and business system, the effect of them on business economy. These subjects influences both, social and economic aspects since a well-developed transport infrastructure being attractive for carriers may increase the flows of transit cargoes but also start stimulating development of different objects of economy. Therefore, by analysing the effects and influences of logistic centres and transport terminals on business and economy development in Lithuania, in this dissertation I have formulated some theory based economic assumptions and methodic solutions towards the development of logistic centers and transport terminals as well as their connecting chains. The objective of the research: to analyse the significance and influence of new transport chains on both, business and economical development of Lithuania as well as enunciation of theory based economic assumptions and methodical solutions for the development of prioritized infrastructures and transport terminals. The work comprises introduction, three chapters, result summary, bibliography, and refers to the author‘s publications on the dissertation topic as well as annexes. The introduction, refers to different attitudes of national... [to full text]
Canton, Pedro Nuno Alegria. "A base aérea de Santos. Conexões e potencialidades." Universidade de São Paulo, 2016. http://www.teses.usp.br/teses/disponiveis/16/16138/tde-16022017-114600/.
Full textThe need for a more efficient and safe air transport instrument connected to Santos Port, able to promote the expansion and balanced development of São Paulo capital, interior, south and north coast of the state by increasing the connections to the Metropolitan Region of Santos, acting as receiver and transmitter of energy, social, urban and economic flows on the macro metropolitan sphere of capital, was the reason of the special interest in developing this research. In this context, the Santos Air Base presents a potential sui generis creation of an intermodal complex of cargo and passenger with a unique fusion of air, water, rail and road transport in Latin America. Based on a systematic analysis of the historical context of the region, its current economic situation and the functioning of people and freight logistics of this system, are outlined the potential of the object of study as a strategic point for this purpose.
Terminaitė, Rima. "Integruotos keleivinio transporto politikos įgyvendinimas Lietuvoje." Master's thesis, Lithuanian Academic Libraries Network (LABT), 2013. http://vddb.laba.lt/obj/LT-eLABa-0001:E.02~2013~D_20130625_191132-37501.
Full textThe thesis analyzes integrated passenger transport policy implementation in Lithuania, discusses the design and implementation process of an integrated passenger transport policy development, describes policy assessment measures, their selection and the success of their implementation, and introduces the most important EU legislative requirements and the application of these provisions in Lithuania’s transport policy.
Smith, Neil C. E. "Carrier-mediated transport of norepinephrine transporter substrates." Thesis, University of Surrey, 2000. http://epubs.surrey.ac.uk/843076/.
Full textJagintavičius, Darius. "Transporto sektoriaus analizė darnaus vystymosi požiūriu." Master's thesis, Lithuanian Academic Libraries Network (LABT), 2012. http://vddb.laba.lt/obj/LT-eLABa-0001:E.02~2012~D_20120620_131137-66778.
Full textThe purpose - to carry out motor Lithuania sector analysis of indicators of sustainable environmental, economic and social aspects of development in 2000-2011. The performance targets set for itself were collected, grouped and analyzed statistical data related to the transport sector and the sustainable development of the sector covering the environmental, economic and social aspects. The analysis covers the period 2000 - 2010 years. During this period the Lithuanian transport sector is very developed .. Road vehicles 2000 - 2006 increased by 40%. Later, the increase was less pronounced. Fuel consumption in the transport sector during the analysis period increased by 50 percent. Fuel consumption in the transport sector dropped in the current economic crisis. An increasing share of freight and passenger turnover of road transport occupies. Passengers carried by public buses by the year 2008 increased by 22%. Transport sector in the GDP of 2000 - 2008 season increased by 25%. Number of employees in the transport sector during 2000 - 2010 the period decreased by 16%, suggesting that even a small proportion of workers in the transport sector creates a relatively large part of total GDP generated in Lithuania. The total road network grew by 10%. Lithuania mortality rate of traffic accidents decreased by 54%. Freight transport by all modes of transport by the year 2008 to grow at appreciable reduction of the financial crisis. It is only since the year 2009 appreciable increase... [to full text]
Hansson, Stefan R. "The serotonin transporter and vesicular monoamine transporters during development." Lund : Lund University, 1998. http://catalog.hathitrust.org/api/volumes/oclc/68945023.html.
Full textMiranda, Margarida Sofia Quintanilha. "Transmembrane transport of anions by synthetic transporters." Master's thesis, Universidade de Aveiro, 2017. http://hdl.handle.net/10773/22273.
Full textThe chloride transport across the phospholipid bilayer assisted by small synthetic molecules were studied by computational methods including quantum calculations followed by molecular dynamics simulations and free energy calculations. A series of twelve tris-thiourea aryl substituted putative transporters, with three different six-membered rings as scaffolds (desmethyl cyclohexane, hexamethyl cyclohexane and benzene) and each of them with four possible aryl substituents (3,5-trifluoromethyl, p-trifluoromethyl, p-nitro and phenyl), were studied in silico in order to understand the experimental transport data previously reported for these molecules. The computational study started with the DFT optimization of twelve chloride complexes in gas phase and in DMSO at the M062X/6-31+G** theory level. The strength of the N-H···Cl- interactions were ascertained through the E2 values obtained from the second order perturbation theory, the Wiberg bond Indexes and the most positive value of the electrostatic potential (VS,max). Overall, these descriptors increases with the binding affinity constants reflecting the electron withdrawing character of the aryl substituents. Thus, the 3,5-trifluoromethyl substituted transporters presented the highest values for the quantum descriptors as well as the highest binding affinity for chloride anion, indicating that these molecules are able to successfully uptake the anion from the water phase and further proceed to its transport across the phospholipid bilayer. Subsequently, the passive diffusion of these chloride complexes were then investigated by MD simulations positioning them either in the bilayer core and water phase. Overall, the MD simulation runs reveal that the transporters were able to promote chloride uptake and release events, consistent with anion carrier transport mechanism. Furthermore, free energy profile for 3,5-trifluoromethyl hexamethyl cyclohexane complex and free chloride were constructed from the potential mean force calculations. The chloride complex has to surpass an energy barrier to cross the middle of the phospholipid bilayer of 2 kcal mol-1 while for the free chloride this energy increases to 19.5 kcal mol-1 indicating that the chloride transport assisted by this receptor is energetically favoured. Another remarkable feature from the MD simulations is that the chloride complexes fit comfortably well below the membrane’s interface which seems to indicate that the receptors are able to operate as a chloride shuttle without leaving the phospholipid bilayer.
O transporte de cloreto pela bicamada fosfolipídica, assistido por pequenas moléculas sintéticas, foi estudado através de métodos computacionais, incluindo cálculos quânticos, simulações de dinâmica molecular e cálculos de energia livre. As propriedades de transporte de um conjunto de doze tris-tioureias contendo um anel central de seis membros (cicloexano, cicloexano hexametilado e benzeno) derivatizado com grupos arilo (3,5-trifluorometilo, p-trifluorometilo, pnitro e fenilo), foram estudados in silico tendo como objetivo a compreensão de dados experimentais de transporte reportados. O estudo computacional iniciou-se com a otimização dos doze complexos em fase gasosa e em dimetilsulfóxido (DMSO), ao nível de teoria de M06-2X/6- 31+G**. A força das interações NH···Cl- foi determinada através dos valores de E2 obtidos da teoria de perturbação de segunda ordem, dos índices de ligação de Wiberg e do valor mais positivo de potencial electroestático (VS,max). Estes descritores aumentam com as constantes de afinidade, refletindo o carácter electroatractor dos substituintes arilo. Assim, os três transportadores com grupos 3,5-trifluorometilo apresentaram os valores mais altos para estes descritores e para afinidade ao cloreto, demonstrando que estas moléculas conseguem de facto capturar um anião da fase aquosa e proceder ao seu transporte através da bicamada fosfolipídica. Seguiu-se o estudo do processo de difusão passiva para estes três complexos por dinâmica molecular, tendo estes sido colocados tanto na fase aquosa como no centro da bicamada fosfolipídica. Estas simulações revelaram que os transportadores eram capazes de promover os processos de captura e libertação de cloreto. Além disso, os perfis de energia livre para o complexo do ligando cicloexano hexametilado derivatizado com 3,5-trifluorometilo e para o cloreto livre foram obtidos através de cálculos de potencial de força média. O complexo tem que superar uma barreira energética de 2 kcal mol-1 para atravessar o meio da bicamada enquanto o cloreto livre tem que ultrapassar uma barreira de energia livre de 19.5 kcal mol-1, i.e. o transporte assistido pelo recetor é energeticamente mais favorável. Outra caraterística importante das simulações está relacionada com o facto dos complexos de cloreto de inserirem confortavelmente abaixo da interface da membrana, indicando que os recetores conseguem operar como transportadores de cloreto sem sair da bicamada fosfolipídica.
Maia, Camila Alves. "Modelagem de redes multimodais integradas de transporte público: discussão conceitual e aplicada." reponame:Repositório Institucional da UFC, 2013. http://www.repositorio.ufc.br/handle/riufc/11165.
Full textSubmitted by Marlene Sousa (mmarlene@ufc.br) on 2015-03-17T12:42:13Z No. of bitstreams: 1 2013_dis_camaia.pdf: 4864699 bytes, checksum: c547efb24bd8f2cd360fdb2edf7b6895 (MD5)
Approved for entry into archive by Marlene Sousa(mmarlene@ufc.br) on 2015-03-31T13:15:53Z (GMT) No. of bitstreams: 1 2013_dis_camaia.pdf: 4864699 bytes, checksum: c547efb24bd8f2cd360fdb2edf7b6895 (MD5)
Made available in DSpace on 2015-03-31T13:15:53Z (GMT). No. of bitstreams: 1 2013_dis_camaia.pdf: 4864699 bytes, checksum: c547efb24bd8f2cd360fdb2edf7b6895 (MD5) Previous issue date: 2013-08-30
The urban public transportation is an alternative solution to the negative impacts of the current transportation model, and, to enable a quality supply of transportation services, tools are required to allow efficient systems planning in an integrated way. Due to their specific characteristics, integrated multimodal transit networks have problems related to the modeling of the types of integration and route choice, which, from many perspectives, are more complex than those found in road networks. Thus, in this paper there is a conceptual and applied analysis about integrated multimodal transit networks modeling, using the Western Area of the Metropolitan Region of Fortaleza with software TransCAD, and checking the efficiency of the combined models of modal and route choice and the insertion of random character and representation of the effects of congestion. In the assignment by a strategy method, it is possible to observe that there was a reduction of time related to transfers, confirming its characteristic to minimize the time spent by users on the stops. The adoption of the capacity constraint caused a significant increase in generalized cost and in walk time. The adoption of the capacity constraint also shown an impact on the dispersion of demand on the network, presenting great variation of loaded routes. Adopting stochastic effects, there was an increase in parcels of travel time and in in-vehicle distance. Finally, we can conclude that the strategy methods and the equilibrium methods are quite different about the assignment results, with significant differences in the time parcels related to transfers. It is noticed that, although the scientific community consider the Stochastic User Equilibrium as the state of the art method, when it is subjected to certain situations, it can present the same results as a rather simplistic method like All or Nothing. Therefore, when there is no command of each executed step, an assignment method may behave unexpectedly, compromising the results of the whole process, and consequently, it will not be an effective tool to support intervention projects in transportation systems.
O transporte público urbano é uma alternativa de solução para os impactos negativos do modelo atual de transporte, e para viabilizar uma oferta de qualidade, são necessárias ferramentas que possibilitem um planejamento eficiente dos sistemas de maneira integrada. Devido a suas características específicas, redes multimodais integradas de transporte público apresentam problemas associados à modelagem dos tipos de integração e da escolha de rota, os quais, em várias perspectivas, são mais complexos do que os encontrados em redes viárias. Desta forma, esta dissertação realiza uma análise conceitual e aplicada da modelagem de redes multimodais integradas de transporte público urbano, utilizando a Zona Oeste da Região Metropolitana de Fortaleza por meio do programa TransCAD, e verificando-se a eficiência dos modelos combinados de escolha de modos e rotas quanto à inserção do caráter aleatório e à representação dos efeitos do congestionamento. Ao considerar a alocação da demanda por meio de um método de estratégias, observou-se que houve redução das parcelas de tempo relacionadas aos transbordos, confirmando sua característica de minimizar o tempo gasto nas paradas pelos usuários. A adoção da restrição da capacidade provocou aumento significativo no custo generalizado, além de apresentar um maior tempo de caminhada. Também houve impacto sobre a dispersão da demanda na rede, apresentando maior variação de rotas carregadas. Ao considerar efeitos estocásticos, observou-se aumento em parcelas do tempo de viagem, além da distância percorrida quando embarcados. Por fim, conclui-se que os métodos de estratégia e os métodos de equilíbrio são bastante distintos quanto aos resultados da alocação, com diferenças significativas nas parcelas de tempo relacionadas ao transbordo. Percebe-se que, apesar de o Equilíbrio Estocástico do Usuário ser considerado pela comunidade científica como o método do estado da arte, ao ser submetido a certas condições, pode apresentar resultados semelhantes a um método bastante simplista como o Tudo ou Nada. Assim, nota-se que quando não há domínio de cada etapa que está sendo executada, um método pode se comportar de maneira inesperada, comprometendo os resultados de todo o processo, e consequentemente, não será uma ferramenta eficaz para apoiar projetos de intervenções nos sistemas de transportes.
Borglund, Terese, and Mortensen Kristoffer Lynge. "Intermodala transporter : Undersökning av alternativ lösning för intermodala transporter." Thesis, Malmö universitet, Institutionen för Urbana Studier (US), 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:mau:diva-44828.
Full textRoad freight transport is expected to increase significantly in the future if no action is taken. Policymakers are aware that the situation is not sustainable and propose better use of alternative transport, which includes rail transport in intermodal transport. An intermodal system makes it possible to achieve cost savings and higher use of rail transport, as intermodal transport enables the combination of the specific advantages of each mode of transport. This study examines existing problems with the implementation of intermodal transport and what alternative solutions exist that could potentially promote intermodal transport. The study is based on previous research on intermodal transport and empirical collected material from interviewees in the industry as well as relevant data from reports. Problems emerge during transhipment and accessibility on the railway, which has a negative impact on the cost, reliability and speed of transport. It also emerges that several transport relationships and a higher frequency of services are a prerequisite for intermodal transport to produce shorter transport times. The challenge with several transport conditions in Sweden has been that the utilization rate at terminals has been low because there is not a sufficiently high flow between these relationships to create profitability. Train operators believe that a higher speed and a higher load weight would mean increased competitiveness in the market. A higher speed and a higher load weight would also mean greater accessibility and a greater amount of goods per transport. However, the transshipment would still have a negative impact on reliability and flexibility. The study has investigated Flexiwaggon as an alternative intermodal transport solution that could potentially promote intermodal transport. Flexiwaggon is similar to the alternative transport solution RoLa whose vision is to move road transport to the railway. Common to both solutions is to promote the use of intermodal transport. Flexiwaggon shows potential in transhipment due to the flexibility of automated transhipment technology. This means potential saving on terminal, personnel and associated transhipment equipment. What speaks against Flexiwaggon is the investment cost of the wagon solution. Train operators often invest in entire trainsets and would need to replace their existing trainset, reducing train operators' incentives for an alternative intermodal transport solution such as Flexiwaggon as the cost is high.
Calabrezi, Sandro Roberto da Silva. "A multimodalidade para o transporte de cargas : identificação de problemas em terminais visando a integração dos modais aereo e rodoviario." [s.n.], 2005. http://repositorio.unicamp.br/jspui/handle/REPOSIP/257717.
Full textDissertação (mestrado) - Universidade Estadual de Campinas, Faculdade de Engenharia Civil, Arquitetura e Urbanismo
Made available in DSpace on 2018-08-08T23:36:03Z (GMT). No. of bitstreams: 1 Calabrezi_SandroRobertodaSilva_M.pdf: 1641254 bytes, checksum: 162c99ccc53df13772e289672b702d39 (MD5) Previous issue date: 2005
Resumo: O setor de transportes, além de transportar pessoas e mercadorias, promove a integração entre regiões contribuindo, dessa forma, para o desenvolvimento econômico de um país. Em escala mundial, o transporte de cargas tornou-se um diferencial na conquista de novos mercados. Um transporte eficiente, ágil e seguro é fundamental para o sucesso nas relações comerciais. A multimodalidade surgiu da necessidade de se obter um sistema de transporte de qualidade e que atendesse às prioridades do mercado. Para tanto, a multimodalidade promove de forma racional a integração entre diferentes modais, para o transporte de uma mesma mercadoria. Para que o conceito de multimodalidade possa ser aplicado é necessária a presença de terminais multimodais para que se realizem as integrações entre os diferentes modais. Diante da importância do tema, o estudo propõe a identificação dos problemas existentes na infra-estrutura dos terminais multimodais, visando a integração dos modais aéreo e rodoviário no Aeroporto Internacional de Viracopos situado na Região Metropolitana de Campinas. O estudo identifica os problemas existentes nos terminais de importação e exportação do Aeroporto de Viracopos, e por meio da técnica da árvore de causas-raiz ou ¿os cinco porquês¿, consegue chegar a suas causas-raiz, além de contribuir com sugestões para reduzir as conseqüências dos problemas
Abstract: The transport sector besides being responsible for carrying people and goods, promotes the integration between regions contributing, in this way, for the economic development of a country. In a world-wide scale, the freight transportation became a differential in the successful conquer of new markets. An efficient, agile and safe transport is a basic aspect for the success in the commercial relationship. The multi-modal transport was idealized from the necessity of a competent transport system, which contemplated the priorities of the market. For that, the multi-modal transportation promotes, in a coherent form, the integration between different forms of transport, for carrying the same cargo. The multi-modal transport concept requires, for its implementation, the presence of multimodal terminals intending the integration between the different forms of transport. In view of the importance of this subject, this study proposes the identification of the existing problems in the infrastructure of the multi-modal terminals, aiming at the aerial and road transport integration in the International Airport of Viracopos, situated in the Metropolitan Region of Campinas. This study identifies some problems in the cargo terminals of the Airport of Viracopos, and through the method known as root cause or the five why identifies their origins, contributing with suggestions to minimize the consequences of these problems
Mestrado
Transportes
Mestre em Engenharia Civil
Santos, Valdemir dos. "Da organização à crise do sistema integrado do transporte coletivo na grande Aracaju." Pós-Graduação em Geografia, 2016. http://ri.ufs.br/jspui/handle/riufs/7936.
Full textO espaço urbano das grandes metrópoles mundiais cada vez mais enfrenta dificuldades com o fenômeno da mobilidade urbana, e o transporte público coletivo ainda é considerado um dos melhores modais a ser usado para essa finalidade. No Brasil não é diferente, o transporte coletivo é o grande responsável pelo deslocamento da massa populacional dos grandes e médios centros urbanos e responsável pela formação da rede urbana a partir de seus traçados formados por ruas, avenidas, pontos de paradas e terminais de embarque e desembarque ligando os diversos pontos da(s) cidade(s). Ao longo dos anos, percebeu-se que esse transporte, organizado para promover a mobilidade urbana e o desenvolvimento das cidades, vem enfrentando uma grave crise financeira e estrutural, refletindo diretamente em seus usuários, assim como no uso do espaço urbano. Os municípios de Aracaju, Nossa Senhora do Socorro, São Cristóvão e mais recentemente, Barra dos Coqueiros, têm chamado a atenção com seus sistemas de transporte público coletivo, mergulhado em uma crise estrutural sem precedentes. Diante disso, este trabalho teve sua motivação alicerçada na problemática da dinâmica espacial que compromete cada vez mais o sistema de transporte coletivo aracajuano, que vem desde sua (r)organização e é aprofundada com a crise da mobilidade urbana e a crise financeira e estrutural que este vivencia e, por conseguinte, deu uma nova configuração na geografia do transporte público metropolitano de Aracaju. Com isso, esta dissertação tem como objetivo analisar a (r)organização do sistema integrado de transporte público coletivo dentro das limitações da escala proposta, na trajetória espaço e tempo dos seus últimos trinta anos de sistema; avaliar as políticas públicas implantadas nesse intervalo de tempo; identificar os elementos causadores dessa crise e seus impactos no cotidiano do usuário do transporte e; verificar a relação entre a urbanização e a oferta do transporte coletivo nessa região sob a luz do plano de mobilidade urbana dos municípios envolvidos. Apesquisa é empírica analítica e tem como método a análise crítica de dados qualitativos e quantitativos, com procedimentos metodológicos que se basearam no levantamento bibliográfico e documental; pesquisa de campo com a obtenção de dados primários e secundários através das entrevistas estruturadas e questionários com atores sociais que fazem uso do sistema de transporte; análise e tabulação dos dados coletados durante a pesquisa e; elaboração de cartas temáticas, tabelas, quadros e redação final.
São Cristóvão, SE
Gameiro, Augusto Hauber. "Índices de preço para o transporte de cargas: o caso da soja a granel." Universidade de São Paulo, 2003. http://www.teses.usp.br/teses/disponiveis/11/11132/tde-17092003-140938/.
Full textThis research was motivated by the necessity of developing a methodology to elaborate price indexes to cargo freights for agroindustrial products in Brazil. The study on the most used mathematical formulas to elaborate indexes resulted in a ranking that considers their superiority in terms of theoretical approximations. It was concluded that Fisher and Walsh indexes are those that attend most of the logical, statistical and economic principles, followed by the geometric indexes, like Vartia, Törnqvist and Theil. Laspeyres and Paasche, in spite of their limitations, are widely used in practice. The research on the existing transportation indexes ratifies the idea that the Laspeyres is the most used. The analysis also showed that these indexes are generally calculated considering well-defined routes to specific transportation modes and cargoes. A case study was selected to evaluate variations on possible procedures to index elaboration. The utilization of a specific study is justified by the need of empirically evaluating the results to be obtained through different indexes. In view of that, it was chosen the bulk soybean hauled by road transport in Brazil. Four treatments were conducted. The treatments 1 and 4 seemed to be more suitable to calculate an index for a general price level. The first one, nevertheless, shows low capacity to supply less aggregated information, provided that has only items related to different distances groups. The fourth, which uses equations of price in function of distance, should be carefully considered when referring to sub-indexes transparency. The main advantage of this treatment is the knowledge of general price level without information loss. This treatment, under the theorical approach, looks quite reasonable: it attempts to the majority of axiomatic tests, is based on statistics foundation and uses an economic function that, when estimated, gives the relation between price and quantity. The treatments 2 and 3, in their turn, try to rank more information through disaggregation, showing sub-indexes for distances groups and origin and destination regions. On the other side, this advantage causes the need of significantly more efforts (large number of observations) in sampling process. The outcome of incomplete information is the occurrence of distortion (errors) in final results. Related to the weighting system, two possibilities were tested: using the own sample as the main source (traveled distance), or using exogenous information (in this case, from an origin-destination matrix built for this purpose). Its recommended the employment of origin-destination matrixes, based on the argument that this would reduce the responsibility over the sampling process that, beyond the prices, should comply the volumes that were transported. As a result, it was obtained that the general price level variation of the soybean transported by road in Brazil, between February 1998 and March 2002, was 76%, considering the treatments 1 and 4.
Rios, Mariana França. "Metodologia para localização de terminais do sistema de transporte público coletivo urbano." reponame:Repositório Institucional da UnB, 2007. http://repositorio.unb.br/handle/10482/3023.
Full textSubmitted by Kathryn Cardim Araujo (kathryn.cardim@gmail.com) on 2009-12-10T15:36:28Z No. of bitstreams: 1 2007_MarianaFrancaRios.PDF: 2542586 bytes, checksum: 4df2f47e3dd123dd038f138d112d8f0b (MD5)
Approved for entry into archive by Lucila Saraiva(lucilasaraiva1@gmail.com) on 2010-01-07T20:32:57Z (GMT) No. of bitstreams: 1 2007_MarianaFrancaRios.PDF: 2542586 bytes, checksum: 4df2f47e3dd123dd038f138d112d8f0b (MD5)
Made available in DSpace on 2010-01-07T20:32:57Z (GMT). No. of bitstreams: 1 2007_MarianaFrancaRios.PDF: 2542586 bytes, checksum: 4df2f47e3dd123dd038f138d112d8f0b (MD5) Previous issue date: 2007-07-20
Este trabalho tem o objetivo de desenvolver uma metodologia para localização de terminais urbanos de passageiros do Sistema de Transporte Público Urbano por Ônibus - STPUPO, baseado na premissa de que os terminais, juntamente com os pontos de parada formam um subsistema de terminais. Para essa localização foram identificados os aspectos que influenciam na localização, e que são determinados pela Estrutura Funcional do STPUPO. Tal Estrutura Funcional é formada pelos Modelos Funcional, de Gestão e de Delegação. Os aspectos utilizados para a localização dos terminais foram os dados referentes ao embarque e transbordos de passageiros e a freqüência de veículos na rede de transporte público. Esta metodologia está dividida em sete etapas, que correspondem a: definição da área de estudo, definição do horizonte de estudo, montagem do Banco de Dados Geo-referenciado, obtenção da rede de transporte público por ônibus do Modelo Funcional do STPUP, identificação dos locais em potencial para a localização dos terminais do subsistema de terminais, definição dos pontos de parada e terminais e priorização dos terminais. Para a localização e priorização dos terminais foi utilizado o MAH – Método de Análise Hierárquica. Este método consiste em delimitar os critérios que influenciam na localização dos terminais, e posteriormente julga-los e ponderá-los, gerando ao final uma classificação de prioridades para a instalação dos terminais. A metodologia desenvolvida foi aplicada à cidade de Manaus. Ao final obteve-se a localização de um conjunto de terminais que fazem parte do subsistema de terminais de Manaus. _______________________________________________________________________________ ABSTRACT
The objective of this work is the development of a methodology for terminal location definition in the Bus Urban Public Passenger Transportation System - BUPPTS. This methodology has as one of its premises that both terminals/stations and bus stops constitute a specific subsystem. Aspects that determine terminal/station locational decisions were identified. These aspects are determined by the Structure of the BUPPTS, which is formed by the functional, the management and the procurement models. The main information used in the methodology was: boarding and transfer, and vehicle frequency data. The methodology is divided into 7 stages: study area definition; time horizon definition; geodatabase development; public transportation network modeling; identification of preferred sites for terminal location; placement of bus stops and terminals, and ranking of alternatives. The developed methodology was applied to the city of Manaus, and a set of locations for the terminals were identified and ranked.
Yao, Yao. "Multidrug transport by the ABC transporter Sav1866 from Staphylococcus aureus." Thesis, University of Cambridge, 2011. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.609491.
Full textSaraiva, Ana Sofia Monteiro. "A oferta ecológica no sector do transporte expresso em Portugal e a sua relevância no mercado Business-to-Business (B2B)." Master's thesis, Instituto Superior de Economia e Gestão, 2012. http://hdl.handle.net/10400.5/10991.
Full textO Desenvolvimento sustentado é um dos temas mais sensíveis da actualidade. Não só os consumidores, como Estados, media e empresas estão mais atentos ao tema, procurando formas de minimizar o seu impacto ambiental. O sector dos transportes é crucial nesta àrea: não só é um dos sectores mais poluentes como um importante elo na cadeia de valor das empresas, contribuindo para as emissões de CO2 dos seus produtos. O presente estudo analisou a oferta ecológica que o sector do transporte expresso oferece em Portugal e procurou perceber se esta é valorizada pelas empresas na escolha do transportador. As principais conclusões sugerem que os operadores de transporte expresso apresentam já algumas iniciativas e soluções ecológicas, no entanto estas não são um critério primordial das empresas na selecção da transportadora, valorizando antes questões relacionadas com preço e eficiência.
The Sustainable development is one of the most sensitive issues of today. Not only consumers, but also governments, media and companies are more awareness to this issue, seeking for new solutions to minimize its environmental impact. The transport industry is crucial in this area: not only is one of the most polluting sectors as an important link in company?s value chain, contributing to the CO2 emissions of their products. The present study examined the ecological offer of the express transport sector in Portugal and sought to understand whether this is valued by companies in the choice of the carrier. The main findings suggest that transport operators already share some initiatives and environmental solutions; however these are not primary criteria to companies when selecting a carrier partner, emphasizing issues related to price and efficiency.
Hounkanrin, Finagnon. "Le contentieux du transport de marchandises par voie aérienne." Rouen, 1988. http://www.theses.fr/1988ROUEL060.
Full textThe air goods transport takes an important place in international trade. So, it is interessant to take a look aver legal difficulties which are raised and how courts of justice settle them. Air transport is ruled by Warsaw convention which lay down uniform provisions about air carrier's liability. Those provisions were sometimes misinterpreted by law courts (civil or common law). Moreever, technical progress, the improvement of the standard of living have changed the rules laid down for sixty years. The gap between legal rules and reality is a source of problems between carrier and consignor. This theisis makes a synthesis of air freight litigations. Many important questions like carrier's liability, limitation of liability, serious offence were explained. Conditions to sue were definied. Law cases can be classified in two ways : in one hand, those which defend the interest of the consummer and those which defend the interest of the carrier, in other hand those which follow the spirit of warsaw convention and those which do not
Velamakanni, Saroj. "Ion transport by ABC multidrug transporters LmrA and BCRP." Thesis, University of Cambridge, 2006. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.613691.
Full textLuna-Tortós, Carlos. "Evaluation of transport of antiepileptic drugs by efflux transporters (multidrug transporters) of the bloodbrain barrier." Hannover Bibliothek der Tierärztlichen Hochschule Hannover, 2009. http://d-nb.info/1000125068/34.
Full textVasconcelos, Alana Danielly. "Aracaju sob rodas : aspectos da mobilidade urbana no viés do transporte público." Universidade Federal de Sergipe, 2014. https://ri.ufs.br/handle/riufs/4089.
Full textA sociedade atual se encontra diante de vários desafios dos quais o maior deles seja continuar sendo globalizada e ao mesmo tempo sustentável. Desse modo, a busca por alternativas a eles, exige um esforço nunca antes experimentado. A acelerada expansão das cidades, no Brasil, colocou temas como a mobilidade urbana em pauta para discussões, levantando problemas como engarrafamentos, morte no trânsito, falta de infraestrutura das vias, ausência de segurança, precariedade nos transportes públicos que torna o ato de locomoção inseguro e estressante para o cidadão. As vias públicas continuam as mesmas e o número de veículos particulares aumenta cada vez mais. Diante do exposto, e tendo o transporte público como uma saída para a mitigação de problemas no âmbito da mobilidade é que este trabalho avaliou a mobilidade urbana da cidade de Aracaju, Sergipe, no tocante ao serviço e acesso da população ao sistema de transporte público da cidade, através da pesquisa documental, de campo e observacional. Os resultados desse estudo mostram que deve haver uma mudança no modo de pensar da população de modo geral. Precisa-se entender que, não existe privilégio, mas o direito de se transitar com segurança e conforto no âmbito de uma cidade para todos os que a compõe. As vias de circulação são bens públicos e devem ser distribuídas de acordo com a quantidade de pessoas, não de veículos. A cidade deve ser pensada para os pedestres, não para os carros. O transporte coletivo tem prioridade nas vias, pois, permite o transporte em massa da população devendo dar segurança e conforto aos seus usuários. Assim, o planejamento urbano construído em conjunto, demonstra para a população um serviço prestado com transparência, responsabilidade e a existência de uma gestão baseada na democracia. Espera-se, portanto, que essa pesquisa seja útil na esfera do planejamento e gestão do território municipal, contribuindo como uma ferramenta de monitoramento da mobilidade urbana, procurando apresentar caminhos para o desenvolvimento urbano sustentável da cidade de Aracaju.
Furtado, Hermania Saskia de Oliveira. "Uso da MicrossimulaÃÃo na AnÃlise do Impacto de um VeÃculo Urbano de Carga Sobre a OperaÃÃo do TrÃfego em Ãrea Urbana." Universidade Federal do CearÃ, 2013. http://www.teses.ufc.br/tde_busca/arquivo.php?codArquivo=10153.
Full textUrban transport cargo is paramount within the urbanization process, which requires a way to transport their goods and merchandise. However, this displacement in a general sense, contributes significantly to problems of congestion, pollution, noise, among others. This paper aims to assess the impact of using a vehicle on Urban Freight traffic operation in an urban area, making use of a microsimulation tool traffic through the development and comparison of proposed scenarios, based on the central area the city of Fortaleza. The initial model used calibrated parameters of a study on road environment and three alternative scenarios were created that allowed the analysis of the impacts of VUC in the study area. The simulation results indicate that the adoption of a VUC not show performance gains in traffic, however, shows improvement when combined with prohibition of parking on public roads.
Santos, Marcos Martins. "AvaliaÃÃo da EficiÃncia Produtiva das Ferrovias de Carga no Brasil: uma AplicaÃÃo da Metodologia DEA." Universidade Federal do CearÃ, 2011. http://www.teses.ufc.br/tde_busca/arquivo.php?codArquivo=7834.
Full textThe AgÃncia Nacional de Transportes Terrestres (ANTT) monitors the performance of rail freight through various indicators, and ensures that goals are being met or not by investigating the causes of noncompliance. However, there is no evidence of a deep investigation of the level of efficiency of the railway freight transport in Brazil. Note that it was one of the arguments used in favor of privatization of the railways and is one of the principles to be pursued by the agency. The appraisal of the performance of productive units involves analysis to several processes and calculation of a wide variety of productivity measures. Either, it requires choices between an equally comprehensive range of methodologies that seek to identify the most efficient units in the production of certain goods or services. In general, these methods involve the calculation of rates of efficiencies in terms of output per unit of input (eg, cost per unit of output, profit per employee, revenue per unit of capital employed, etc.). Cooper et al. (2000) called this analysis as the search for partial productivity measures since the resulting indicators do not cover all the materials and products used in the process. For a given production process, a complete analysis of efficiency requires the inclusion of all inputs and all outputs. To ensure it, Charnes, Cooper and Rhodes (1978) presented their seminal work called Measuring the efficiency of decision-making units in which describe the fundamentals of Data Envelopment Analysis, or simply DEA. It is actually an extension of the study initially presented by Farrell (1957), which analyzed the problems of partial measures of efficiency. This work is an application of DEA to evaluate the productive efficiency of freight rail lines in Brazil based on data collected by ANTT from 2006 to 2009. From these data, eight models were prepared for analysis. Four was prepared considering constant returns to scale and the other considering variable returns to scale. The proposed models were solved using the package Benchmarking for R. The main hypothesis of this paper is that the large gauge railways tend to be more efficient than the metric gauge railways. The results obtained here suggest that this hypothesis should be rejected.
Liang, Lu. "Nucleoside transport in sheep reticulocytes : evidence for an intracellular transporter pool." Thesis, McGill University, 1992. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=60695.
Full textSchmitt, Sebastian. "Entwicklung von MS-Transport-Assays für die humanen gamma-Aminobuttersäure-Transporter." Diss., Ludwig-Maximilians-Universität München, 2014. http://nbn-resolving.de/urn:nbn:de:bvb:19-178623.
Full textSchaedler, Theresia Anna. "Molecular mechanism of transport by the secondary-active multidrug transporter LmrP." Thesis, University of Cambridge, 2010. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.609036.
Full textPearson, Stephen A. "Glutathione Coordinated Iron-Sulfur Cluster Transport via a Mitochondrial ABC Transporter." The Ohio State University, 2019. http://rave.ohiolink.edu/etdc/view?acc_num=osu1563172940234769.
Full textLawrence, Scott Alan. "The Mechanism of Mitochondrial Folate Transport by the Mitochondrial Folate Transporter." VCU Scholars Compass, 2010. http://scholarscompass.vcu.edu/etd/2066.
Full textTeixeira, Karênina Martins. "Investigação de opções de transporte de carga geral em contêineres nas conexões com a região amazônica." Universidade de São Paulo, 2007. http://www.teses.usp.br/teses/disponiveis/18/18137/tde-27112007-110022/.
Full textNowadays, business and industry are responsible for a significant portion of the GDP (Gross Domestic Product) in Brazil, and together they require a considerable amount of freight transport, mainly break-bulk cargo which has stimulated the transport growth of this kind of cargo. The enormous industrial growth in the most important states of the northern region of the country in the years 2004 and 2005 indicate the potential increase of break-bulk cargo transport between the north and the southeast, area that concentrates the strongest consumer market in the country. Due to the long distance between the country\'s north and southeastern regions, the cost of transport increases the final cost of the goods. This fact led to the search for lower cost transport options in order to make the products of that region more competitive in the domestic market. Currently there has been predominance of road transport in the north/southeast corridor wasting, hypothetically, the potential of other means of transport such as cabotage, river, and, in the future, railroad transport (Norte-Sul and Ferronorte railways). All of this brought about the development of this research which aims at evaluating the intermodal transport options that are economically and operationally more attractive than the break-bulk cargo transport (industrial input and products) used today in the connections with the amazon region. The methodology involves: (1) scenario building; (2) transport cost models for the road, railroad, and marine means; and (3) geographic information system. The results demonstrate that the route options road-marine and road-river show substantial reduction in the transport total cost when compared to the most popular routes used between Belém-São Paulo and Manaus-São Paulo. The results also reveal that there is no perspective of the use of road-rail and road-river-rail transport in such connections since the cost is higher than in the routes used nowadays.
Saghri, Farhad. "Développement économique et coordination des transports en Iran." Lille 3 : ANRT, 1988. http://catalogue.bnf.fr/ark:/12148/cb376097087.
Full textParanhos, Gustavo Carvalho. "Avaliação da configuração de redes de transporte público urbano por meio de indicadores." reponame:Repositório Institucional da UnB, 2011. http://repositorio.unb.br/handle/10482/9374.
Full textSubmitted by Shayane Marques Zica (marquacizh@uol.com.br) on 2011-10-03T18:39:23Z No. of bitstreams: 1 2011_GustavoCarvalhoParanhos.pdf: 1614725 bytes, checksum: 79d814d2a0c86d3847362dfb50877396 (MD5)
Approved for entry into archive by Leila Fernandes (leilabiblio@yahoo.com.br) on 2011-10-04T12:50:47Z (GMT) No. of bitstreams: 1 2011_GustavoCarvalhoParanhos.pdf: 1614725 bytes, checksum: 79d814d2a0c86d3847362dfb50877396 (MD5)
Made available in DSpace on 2011-10-04T12:50:47Z (GMT). No. of bitstreams: 1 2011_GustavoCarvalhoParanhos.pdf: 1614725 bytes, checksum: 79d814d2a0c86d3847362dfb50877396 (MD5)
O transporte público urbano tem como resultado finalístico a garantia do deslocamento das pessoas, dentro das cidades, de modo que elas possam atender suas necessidades de sobrevivência. No entanto, no Brasil as redes de transporte público urbano não são planejadas de forma a interligar de forma eficiente e eficaz os pontos importantes que demandam os deslocamentos dentro das cidades, justamente aqueles que permitem aos indivíduos cumprir com suas obrigações. Por outro lado, os indicadores são frequentemente empregados como poderosas ferramentas de auxílio ao planejamento e à tomada de decisões, sobretudo no setor público. Por tudo isso, é necessário desenvolver um sistema de avaliação baseado em indicadores que permitam avaliar a configuração das redes de transporte público urbano. Utilizando uma metodologia de elaboração de um sistema de indicadores, o trabalho seleciona alguns índices existentes na literatura científica e outros criados ao longo da Dissertação e os aplica em um estudo de caso em uma hipotética cidade brasileira. _______________________________________________________________________________ ABSTRACT
The objective of urban public transportation is to allow movement of people so they can satisfy their needs. However, in Brazil the urban public transport networks are not planned to interconnect efficiently and effectively the points that demand trips across cities which are, in fact, those ones that allow individuals to meet their obligations. On the other hand, indicators are often used as powerful tools to aid planning and decision making, especially in the public sector. For all these reasons, it is necessary to develop an evaluation system based on indicators to evaluate the configuration of urban public transportation networks. By using a methodology of developing a system of indicators some actual indexes in scientific literature are picked up and other indexes are created along this Dissertation. Then, the indicators are applied in a case study in a hypothetical city in Brazil.
Cruz, Jorge Alcides. "Modelo de demanda variavel para a determinação da oferta de transporte coletivo urbano por onibus." reponame:Repositório Institucional da UFSC, 1991. https://repositorio.ufsc.br/xmlui/handle/123456789/157666.
Full textMade available in DSpace on 2016-01-08T16:58:22Z (GMT). No. of bitstreams: 1 84367.pdf: 5084007 bytes, checksum: 95b66a14d0dd1d5d31e978ee7cd28fc5 (MD5) Previous issue date: 1991
A oferta de transporte coletivo por ônibus compreende a especificação dos horários de início das viagens necessárias para transportar todos os passageiros existentes em sua área de influência, com um determinado grau de conforto, ao longo de um dia considerado típico. Inclue também a quantidade de veículos que precisam estar disponíveis para o cumprimento de tais horários. Para tanto, deve-se estabelecer estimativas para as variações da demanda ao longo do tempo e do espaço e também para as distribuições dos tempos de viagem e de espera nos terminais. Os modelos em utilização levam em conta e determinação de períodos típicos em que esses parâmetros são considerados constantes e iguais as médias dos valores observados. Porém, o estabelecimento dos limites de tais períodos não é automático e depende do critério do projetista, o que incorpora um elevado grau de subjetividade. Como conseqüência, a oferta assim calculada se torna pouco precisa e o processo, demorado e custoso. Neste trabalho é desenvolvido um modelo alternativo de estimação que dispensa a determinação dos períodos típicos, o que elimina a descontinuidade do processo de cálculo e as etapas que exigem a decisão do planejador. Isto permite que seja informatizado, reduzindo sua duração e custos e aumentando sua precisão.
Fujiwara, Melina Yumi. "Mobilidade urbana por meio da integração entre transporte coletivo e cicloviário." reponame:Repositório Institucional da UFSC, 2017. https://repositorio.ufsc.br/xmlui/handle/123456789/182707.
Full textMade available in DSpace on 2018-01-16T03:18:31Z (GMT). No. of bitstreams: 1 349728.pdf: 4352583 bytes, checksum: aa86d18f597f2d3e9983be2252420cd7 (MD5) Previous issue date: 2017
O atual modelo de deslocamento urbano que prioriza o uso do automóvel tornou-se insustentável devido às externalidades negativas (congestionamento e poluição do ar). Como solução, a Política de Mobilidade Urbana sugere, como uma possibilidade, a integração entre o transporte coletivo com a bicicleta. O objetivo deste estudo identificar os fatores que interferem no uso da bicicleta de forma integrada com o transporte público considerando a relação entre o usuário de ônibus e a infraestrutura cicloviária existente. O estudo adotou duas abordagens: uma com enfoque na avaliação das infraestruturas instaladas nos terminais de ônibus e as condições da rede cicloviária, e outra para descobrir qual o potencial de integração entre os dois modos por meio da técnica de pesquisa declarada. O método proposto foi dividido pelas seguintes etapas: (1) definição da área de abrangência, (2) avaliação dos terminais e o uso do solo do entorno, (3) avaliação dos espaços cicláveis, (4) coleta de dados sobre o comportamento de viagens dos usuários de ônibus e sua propensão à integração. Foi realizado um estudo de caso em dois terminais de transporte público (Terminal de Integração do Centro - TICEN e o Terminal de Integração do Rio Tavares - TIRIO) da cidade de Florianópolis, que estão localizados próximos a ciclovias e ciclofaixas. A avaliação do uso do solo dos terminais mostrou que estão localizados em áreas urbanizadas com a existência de áreas comerciais e residências. Os terminais foram considerados passíveis de integração, pois possuem paraciclos instalados em sua proximidade. Os usuários de ônibus foram entrevistados fornecendo dados necessários para o estudo que incluía um questionário e uma pesquisa de preferência declarada. Os dados obtidos da pesquisa de preferência declarada permitiram identificar as ciclovias e ciclofaixas como os atributos de infraestrutura com maior importância, em detrimento de existência de bicicletários e vestiários. A avaliação do nível de serviço das vias cicláveis identificou que a via próxima ao TICEN obteve uma classificação melhor do que a do TIRIO devido à existência de uma ciclovia. Em síntese, a existência de infraestrutura influencia diretamente a integração e colabora para que a bicicleta seja vista como um modo de transporte.
Abstract : The current model of urban displacement that prioritizes the use of the automobile has become unsustainable due to negative externalities (congestion and air pollution). As a solution, the Urban Mobility Policy suggests, as a possibility, the integration between collective transport and bicycle. The objective of this study was to identify the factors that interfere in the use of the bicycle in an integrated way with the public transport considering the relation between the bus user and the existing bicycle infrastructure. The study adopted two approaches: one focusing on the evaluation of the infrastructures installed in bus terminals and the conditions of the cycling network, and another to find out the potential of integration between the two modes through the declared research technique. The proposed method was divided by the following steps: (1) definition of the area of coverage, (2) evaluation of the terminals and the use of the surrounding soil, (3) evaluation of the cycling spaces, (4) Travel of bus users and their propensity for integration. A case study was carried out in two public transportation terminals (Centro Integration Terminal - TICEN and TIRIO Rio Integration Terminal - TIRIO) in the city of Florianópolis, which are located near bicycle paths and cycle paths. The evaluation of the land use of the terminals showed that they are located in urbanized areas with the existence of commercial areas and residences. The terminals were considered to be integrable, since they have paracycles installed in their proximity. Bus users were interviewed providing data needed for the study that included a questionnaire and a pre-declared research. The data obtained from the research of declared preference allowed to identify the bicycle lanes and cycle paths as the attributes of infrastructure with greater importance, to the detriment of the existence of bicycle and locker rooms. The assessment of the level of service of cycle paths has identified that the route close to TICEN has been ranked better than that of TIRIO due to the existence of a bicycle path. In short, the existence of infrastructure directly influences integration and contributes to the bicycle being seen as a mode of transportation.
Takano, Marise Santos Maranhão. "Metodologia para análise dos efeitos dos estágios no ciclo de vida no comportamento de viagem." reponame:Repositório Institucional da UnB, 2018. http://repositorio.unb.br/handle/10482/34217.
Full textCoordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES).
Este trabalho apresenta as etapas metodológicas para a construção de um modelo de análise demanda em transportes que leve em consideração os estágios no ciclo de vida familiar. Consiste em um trabalho teórico, conceitual e metodológico, não tendo sido feita aqui uma aplicação empírica. Apresenta-se como um manual de procedimentos pioneiros no Brasil que insere novos paradigmas científicos na análise de demanda no Brasil ao incrementar, no modelo tradicional de planejamento de transportes, conceitos inerentes aos comportamentos do indivíduo como agente produtor de viagens, as interações entre fatores intervenientes, as interações entre as respostas no modelo além da consideração da estrutura de dados em análise. A extensa sistematização da literatura trazendo o estado da arte em comportamentos de viagem, estágio no ciclo de vida e métodos de análise em demanda possibilitaram a definição da metodologia proposta e a alcance dos objetivos. Além da contribuição conceitual, tem-se como principal contribuição metodológica os fundamentos de um modelo baseado em dados com estruturas hierárquicas e arranjo em painel embasado pela abordagem da biografia de mobilidades, tema mais recente que lida com a essência longitudinal da análise de demanda em transportes. A metodologia definida nesse trabalho pode ser usada para a elaboração de extensões em ferramentas computacionais considerando a modelagem comportamental além de um precursor para elaboração de novos métodos de coleta de dados com foco em análise comportamental em transportes. Pode ainda ser adaptada para demandas principalmente de transporte ativo, como demanda de pedestres e ciclistas, crianças em idade escolar elaboração de impacto de circulação viária para empreendimentos e loteamentos de jovens famílias, pessoas em idade escolar e idosos em fase de aposentadoria ou jovens em início de carreira.
This paper presents a methodological procedure for the construction of a transportation demand analysis model that considers the life-cycle family stages. It consists of a theoretical, conceptual and methodological framework without any empirical application. It’s similar to a manual of pioneering procedures in Brazil with a new scientific paradigms for Transportation Demand Analysis, since it consider concepts inherent in the travel behaviour and the individual as a travel agent in the traditional transportation planning such as: the interactions between factors, between individuals in the same household, interactions between the response variables in the model adopt and a special study about the type of data model that determines the logical structure. To define that Methodology and achieve the objectives, a state of the art was developed through an extensive systematic review of literature about: Travel Behavior, Life-Cycle Stage on Transportation; the Mobility Biographies Approach and Transportation Demand Analysis so that it was possible to define a database model Panel Data Model with hierarchical structures. It deals with the longitudinal essence of transportation demand analysis that it is not considered in modeling, nowadays. The Methodology defined in this study can be used for the development of extensions in computational tools of travel demand like considering behavioral modeling. In another way, it can be applied as a precursor for the elaboration of new methods of data collection focused on behavioral analysis in transport. Even thus, it can also be better applied on empirical studies of Active Transportation, such as pedestrian and cyclist demand, school-age children, and at Impact Reports on Urban Transit that take in account new residential location for young families, school-aged children and young, senior citizens.
Cruz, Thania Regina Pantoja da Vera. "Causas e conseqüências da limitação da cabotagem no transporte de carga pela costa brasileira : uma avaliação hierárquica no trecho Manaus - Santos." reponame:Repositório Institucional da UnB, 2007. http://repositorio.unb.br/handle/10482/3283.
Full textSubmitted by Fabrícia da Silva Costa Feitosa (fabriciascf@gmail.com) on 2010-01-14T18:45:50Z No. of bitstreams: 1 2007_ThaniaReginaPdaVeraCruz.pdf: 1286560 bytes, checksum: e105c2b12f4bc13b8fb165d035c4f2e6 (MD5)
Approved for entry into archive by Carolina Campos(carolinacamposmaia@gmail.com) on 2010-01-18T16:12:18Z (GMT) No. of bitstreams: 1 2007_ThaniaReginaPdaVeraCruz.pdf: 1286560 bytes, checksum: e105c2b12f4bc13b8fb165d035c4f2e6 (MD5)
Made available in DSpace on 2010-01-18T16:12:18Z (GMT). No. of bitstreams: 1 2007_ThaniaReginaPdaVeraCruz.pdf: 1286560 bytes, checksum: e105c2b12f4bc13b8fb165d035c4f2e6 (MD5) Previous issue date: 2007-06-17
Este trabalho propõe uma avaliação do cenário da cabotagem, por meio de uma análise hierárquica dos seus entraves na rota entre os portos de Santos-SP e de Manaus-AM, a partir da visão dos atores envolvidos neste cenário. O estudo aborda o histórico do transporte de carga no Brasil e o comportamento da cabotagem dentro deste cenário, com o objetivo de destacar os pontos que afetam o desenvolvimento da cabotagem ao longo da costa brasileira. Além do levantamento bibliográfico foi desenvolvida uma metodologia de avaliação dos principais entraves da cabotagem, dividida em 3 etapas: definição do plano de pesquisa ou proposta da pesquisa; escolha do método a ser utilizado com definição dos grupos de variáveis e atores; aplicação e análise do estudo de caso. Esta metodologia propõe a utilização de um Método de Auxílio à Tomada de Decisão por Múltiplos Critérios, o Analytic Hierarchy Process- AHP. A avaliação dos entraves foi feita a partir da comparação paritária desses gargalos pelos principais atores que compõem o cenário da cabotagem: armadores, donos de carga, representantes de operadores portuários e a Agência Nacional de Transporte Aquaviário (ANTAQ), segundo o conhecimento e sensibilidade de cada um desses grupos em relação à legislação e às questões portuárias, logísticas e operacionais. Esta avaliação possibilitou analisar a visão de cada um desses grupos em relação ao sistema de cabotagem no Brasil, encontrando pontos comuns e divergentes entre eles. Desta forma, tem-se uma visão geral da importância do tema proposto e a necessidade de reavaliação do sistema de forma que atenda às necessidades de todos os envolvidos no contexto. _______________________________________________________________________________ ABSTRACT
This work considers an evaluation of the scene of the cabotage, through a hierarchic analysis of its impediments on the route between Santos port and Manaus port, by the vision of the involved actors in this scene. The considered study approaches the history of the freight transportation in Brazil and the behavior of the cabotage on this scene, with the objective to emphasize the points that affect the development of the cabotage throughout the Brazilian coast. In addition to the bibliographical survey, an evaluation methodology of the cabotage main impediments was proposed, which is divided in 3 stages: definition of the research plan or proposal of the research; choice of the method to be used with definition of the groups of variables and actors; application and analysis of the case study. This methodology considers the use of a multiple criteria decision making method, the Analytic Hierarchy Process- AHP. The evaluation of the cabotage impediments was done from the parity comparison of these impediments by the main actors who compose the scene of the cabotage: load ship owners, load owners, representatives of port operators and the Brazilian regulator agency (ANTAQ), according to knowledge and sensitivity of each one of these groups about the laws and the portuary, operational and logistic questions. This evaluation made possible to analyze the vision of each one of these groups in relation to the cabotage system in Brazil, finding common and divergent points between them. In such a way, it’s a general vision about the importance of the considered subject and the need of a system reevaluation to meet the necessities of all the involved ones in the context.
Borie, Olivier. "Contribution des systèmes d'information à la flexibilité organisationnelle : problématique d'informatisation des cellules de dispatch d'une entreprise de transport combiné rail-route." Aix-Marseille 2, 2000. http://theses.univ-amu.fr.lama.univ-amu.fr/2000AIX24017.pdf.
Full textMeyer, Karine. "La concurrence rail route : analyse économétrique des trafics de marchandises et des perspectives du transport combiné." Paris 1, 1998. http://www.theses.fr/1998PA010046.
Full textFaced with the competition of road transport of goods and with the structural changes of production system, the SNCF freight has undergone massive changes in the last twenty years. In this context of deep evolution, it is essential to measure the effects of economic growth and transport prices on traffic, by separating the short and the long-term in the demand functions. The statistical analysis carried out on different periods of time enables us to determine more precisely the stability or non-stability of the relations and the tools useful for forecasting. The diversity of the demand justifies to segment the traffics according to the nature of the transported goods. The specificity of the markets leads to refine the databases on road and rail transport prices. It also seems necessary to introduce the variables of foreign exchange (imports and exports) and to differentiate the variables of growth according to industrial fields. All this allows to define more accurately the characteristics of transport prices and service quality at the level of the competition between rail and road. In response to the changing demand, the SNCF has set up a multimodal service : the combined transport. A modelling of market shares is developed with the cross-sectional data technique, according to the diversity of the relations and the context of drastic evolution. It measures the effects of service quality and combined transport prices on combined and road traffics market shares, while distinguishing between short and long distance axis. These quantitative analyses bring an additional help to make the strategic choices in the development of the SNCF freight
Dias, Flavio Augusto de Oliveira Passos. "Serviços de táxi : elementos para um novo modelo regulatório." reponame:Repositório Institucional da UnB, 2007. http://repositorio.unb.br/handle/10482/2504.
Full textSubmitted by Fernanda Weschenfelder (nandaweschenfelder@gmail.com) on 2009-12-02T17:26:11Z No. of bitstreams: 1 2007_FlavioAugustodeOliveiraPDias.pdf: 481552 bytes, checksum: 1e2ba6adbccb4f190d171792df6682b3 (MD5)
Approved for entry into archive by Lucila Saraiva(lucilasaraiva1@gmail.com) on 2009-12-04T03:35:27Z (GMT) No. of bitstreams: 1 2007_FlavioAugustodeOliveiraPDias.pdf: 481552 bytes, checksum: 1e2ba6adbccb4f190d171792df6682b3 (MD5)
Made available in DSpace on 2009-12-04T03:35:27Z (GMT). No. of bitstreams: 1 2007_FlavioAugustodeOliveiraPDias.pdf: 481552 bytes, checksum: 1e2ba6adbccb4f190d171792df6682b3 (MD5) Previous issue date: 2007-09-11
Os Serviços de Táxi têm uma função importante no contexto do transporte urbano e metropolitano de passageiros. Eles atendem principalmente as pessoas que priorizam o conforto, o tempo ou a mobilidade, em deslocamentos urbanos com as finalidades de negócio, turismo, lazer, compras ou emergência. Todavia, a indústria de táxi, por si só, não alcança a máxima eficiência econômica e social devido à presença de falhas em seus mercados. Assim, uma intervenção estatal é indispensável para a aplicação de medidas saneadoras e, nesse sentido, um modelo regulatório para esta indústria é uma ferramenta importante para o processo de mitigação dessas falhas. Para tanto, na presente dissertação propõe-se diretrizes regulatórias para as combinações entre os fatores relacionados à atividade regulatória e às falhas de mercado. Essas falhas foram identificadas por meio de uma pesquisa bibliográfica e documental desenvolvida a partir de uma análise jurídica no Brasil e do comportamento econômico de 16 mercados nacionais e mercados de 17 outros países. Apesar da diversidade de comportamentos regulatórios observados, o conjunto dos fatores analisados permitiu verificar que os Serviços de Táxi não possuem características típicas de serviço público, diferindo dos transportes públicos coletivos urbanos de passageiros. As principais falhas de mercado de táxi encontradas foram oligopólio, externalidades negativas e assimetria de informação. O segmento radiotáxi apresenta as melhores condições mercadológicas para minimizar essas falhas por poder dispor de economias de escala e de densidade. Verificou-se que os Serviços de Táxi não apresentam custos irrecuperáveis e estão entre as indústrias relativamente competitivas e contestáveis, podendo seus mercados tornar-se mais competitivos com a abertura à livre iniciativa, porém, com regras de transição e com forte regulação dos padrões de qualidade dos serviços, da divulgação das informações e do controle tarifário, seguindo a tendência mundial. _______________________________________________________________________________ ABSTRACT
The taxi services have an important function on the whole urban and metropolitan transport of passengers. They mainly serve people who prioritize comfort, time or mobility in urban trips for business, tour, entertainment, shopping or emergency purposes. However, the taxi industry does not reach itself the maximum economic and social efficiency due to the existence of market failures. Thus, a state intervention to make the necessary arrangements is indispensable; hence a general regulatory model for this industry is an important tool to mitigate those failures. Based on this, regulatory guidelines are proposed in this dissertation for the combinations among the factors related to the regulatory activity and the market failures. Those failures were identified through documental and bibliographic research developed from a legal analysis in Brazil and from the economic behavior that enclose 16 Brazilian markets and markets of 17 other countries. Despite the diversity of regulatory behaviors observed, the set of analyzed factors showed that the taxi services have no typical characteristics of public services, differing from the urban public mass transports. Oligopoly, negative externalities and asymmetric information are the main market failures identified. The phone-booking segment has the best market conditions to minimize these failures, because this segment is able to use economies of density and economies of scale. It was found that sunk costs do not exist in taxi services; these services are among the relatively competitive and contestable industries, being able to become more competitive by working in open markets; however, under transition rules and rigorous regulation about quality standards, dissemination of information and fare control, following the world-wide trend.
Carvalho, Camila Aparecida de. "Análise comparativa do conflito entre o sistema de transporte público urbano e as necessidades de deslocamento da população da cidade de Samambaia." reponame:Repositório Institucional da UnB, 2010. http://repositorio.unb.br/handle/10482/8369.
Full textSubmitted by Raquel Viana (tempestade_b@hotmail.com) on 2011-06-14T17:35:19Z No. of bitstreams: 1 2010_CamilaAparecidadeCarvalho.pdf: 9299568 bytes, checksum: 53745db941ba846ac08a9db2eb6c7566 (MD5)
Approved for entry into archive by Guilherme Lourenço Machado(gui.admin@gmail.com) on 2011-06-15T11:19:19Z (GMT) No. of bitstreams: 1 2010_CamilaAparecidadeCarvalho.pdf: 9299568 bytes, checksum: 53745db941ba846ac08a9db2eb6c7566 (MD5)
Made available in DSpace on 2011-06-15T11:19:20Z (GMT). No. of bitstreams: 1 2010_CamilaAparecidadeCarvalho.pdf: 9299568 bytes, checksum: 53745db941ba846ac08a9db2eb6c7566 (MD5)
O processo de urbanização desordenado das cidades brasileiras ocasionou inúmeras questões de uso e ocupação do solo, deteriorização do meio ambiente, diminuição da qualidade de vida e freqüentes problemas de transporte e transito. Destaca-se ainda a crescente utilização dos modos individuais privados de transportes, principalmente o automóvel, e a continua decadência e ineficiência dos modos de Transporte Publico Urbano (TPU). Dupuy (1987) afirma que uma rede de transportes e vista alem de sua infraestrutura física, pois existem as interações humanas e as necessidades de deslocamento dos indivíduos, que na maioria das vezes, não são devidamente atendidas. A partir dessa premissa de Dupuy e da observação da área de estudo, e que foi elaborada a hipótese de pesquisa de que o Sistema de Transporte Publico Urbano (STPU) da região de Samambaia conflitua com as reais necessidades de deslocamento desta população. Para tanto, o objetivo principal do presente trabalho será fazer uma analise comparativa entre o STPU e as necessidades de deslocamento da população da cidade de Samambaia. A metodologia, então, compreende as seguintes etapas: (I) contextualização da área de estudo, (II) descrição do sistema atual de Transporte Publico Urbano, (III) caracterização da demanda, (IV) analise comparativa. Essa metodologia foi aplicada na Região Administrativa (RA) da cidade de Samambaia e com esse estudo de caso foi possível entender as características domiciliares, individuais e de deslocamentos, possibilitando assim, o entendimento da demanda e do comportamento de viagem da população. Em relação as características domiciliares, percebeu-se que a maioria das residências possui três moradores, não tem posse de veículos e tem acesso ao computador. No que se refere as características individuais, a maioria da população se enquadra na faixa etária de 21 a 30 anos, são estudantes e não tem renda. No que tange aos deslocamentos, a maior parte efetua o tipo de deslocamento pendular e utiliza o ônibus. Por fim, processou-se a comparação destes dados primários obtidos em campo com os dados secundários fornecidos pelo Transporte Urbano do Distrito Federal (DFTRANS) e Governo do Distrito Federal (GDF) e percebeu-se que realmente o TPU de Samambaia e precário e ineficiente, seja em relação a configuração dos itinerários para o atendimento das principais linhas de desejos da população, seja em relação as freqüências e tabelas horárias disponibilizadas aos usuários cativos deste serviço, comprovando-se assim, a hipótese inicial da pesquisa de dissertação. _______________________________________________________________________________ ABSTRACT
The disordered urbanization process of Brazilian cities provoked several land occupation issues, deterioration of the environment poor quality of life and frequent transportation and traffic problems. The growing use of private individual transportation means, mainly cars and the continuous decadence and inefficiency of Public Urban Transportation (TPU). Dupuy (1987) states that a transportation network is seen beyond its physical infrastructure, because of human interactions and displacements needs of individuals, which in most cases are not fulfilled. The research hypothesis that the Public Urban Transportation System (STPU) of the Samambaia region is in conflict with the real needs of displacements of this population was developed from the assumption by Dupuy and the observation in the field. Therefore, the main goal of this dissertation is a comparative analysis between SPTU and the population’s displacement needs. Its methodology will include (I) contextualization of the study area, (II) description of the TPU, (III) characterization of the demand and (IV) comparative analysis. This methodology was applied in the Samambaia Region (RA) and through this case study we could understand the characteristics of domiciles, of individuals and of displacements, thus understanding the demand and the travel behavior of this population. About domiciles characteristics, we saw that most households are of three people, do not have a car and have access to a computer. About individual characteristics most of the population is in the age group from twenty one to thirty years old, are students and do not have any revenue. About displacements, most of them realize pendulum displacement and uses the bus. Finally these primary data were compared to secondary data given by DFTRANS and GDF and we saw that really the Samambaia TPU is precarious and inefficient either in relation to itinerary configuration for the fulfillment of the main desire lines of the population or in relation to the frequency and schedules made available to the captive users of this service, so proving the initial assumption of this dissertation research.
Freitas, Anderson Tavares de. "Metodologia de caracterização da problemática do sistema de transporte público de passageiros a partir dos dados da bilhetagem eletrônica." reponame:Repositório Institucional da UFC, 2015. http://www.repositorio.ufc.br/handle/riufc/19099.
Full textSubmitted by Marlene Sousa (mmarlene@ufc.br) on 2016-08-16T16:47:41Z No. of bitstreams: 1 2015_dis_atfreitas.pdf: 2068918 bytes, checksum: bc7a8fc5fcbba77e8c552d3baf6ee7c5 (MD5)
Approved for entry into archive by Marlene Sousa (mmarlene@ufc.br) on 2016-08-16T16:49:20Z (GMT) No. of bitstreams: 1 2015_dis_atfreitas.pdf: 2068918 bytes, checksum: bc7a8fc5fcbba77e8c552d3baf6ee7c5 (MD5)
Made available in DSpace on 2016-08-16T16:49:20Z (GMT). No. of bitstreams: 1 2015_dis_atfreitas.pdf: 2068918 bytes, checksum: bc7a8fc5fcbba77e8c552d3baf6ee7c5 (MD5) Previous issue date: 2015-06-12
The Automated Fare Collection (AFC) produces information about the trips made in the Public Transportation System (PTS). The storage of such data produces time series which can be used to calculate statistics, yielding travel behavior patterns. Indeed, the AFC produces quality and easily reproducible data and its use is well established in the PTS of several cities in Brazil. However, it is used only for controlling the board and the collection of public transit. Thus, considering the difficulty of characterizing the PTS due to data collection and before the potential available for the use of AFC information, this work proposes to investigate the AFC's ability to provide relevant information on the characterization step in the planning transportation process. To sum up, the main goal of this research is to propose a methodology for characterization of the Public Transportation System from the Automated Fare Collection. Furthermore, we also seek to trace the origin-destination matrix which brings together the observed flows. Using the methodology proposed to characterize the PTS along with data validations of trips made on the public transport in the city of Fortaleza, we obtained specific results about public transport in the city. In addition, we confirmed the effectiveness of the methodology, by validating the matrix obtained from the AFC. In this way, we obtained the following results: demand behavior over time and space; number of trips made by line of bus and by user type; comparison between the origin of trip and the user's domicile; and recovery of the origin-destination matrix of public transport
O Sistema de Bilhetagem Eletrônica (SBE) produz informações acerca das viagens realizadas no Sistema de Transporte Público. A armazenagem desses dados produz séries históricas que podem ser utilizadas para o cálculo de estatísticas, obtendo-se padrões de comportamento de viagens. De fato, o SBE produz dados de qualidade e de fácil reprodução. O uso desse sistema no Brasil já está consolidado nos sistemas de transporte público de várias cidades. No entanto, é constatada a utilização da bilhetagem eletrônica apenas para o controle do embarque e da arrecadação do transporte público. Dessa forma, observada a dificuldade de caracterização do Sistema de Transporte Público de Passageiros (STPP) decorrente da coleta de dados e face o potencial disponível para a utilização das informações da bilhetagem eletrônica, este trabalho propõe-se a averiguar a capacidade desse sistema em fornecer informações relevantes na etapa de caracterização, dentro do processo de planejamento de transportes. Por conseguinte, tem-se que o objetivo principal dessa pesquisa constitui-se em propor uma metodologia de caracterização da problemática do Sistema de Transporte Público de Passageiros a partir dos dados da bilhetagem eletrônica. Em complementação, buscou-se reconstituir a matriz origem-destino que congrega os fluxos observados. Utilizando a metodologia proposta nesse trabalho para a caracterização do STPP juntamente com dados de validações das viagens realizadas no transporte público na cidade de Fortaleza, obtivemos resultados específicos sobre o transporte público da cidade. Além disso, comprovamos a efetividade da metodologia, através da validação da matriz obtida pelo SBE. Dessa maneira, obtivemos os seguintes resultados: comportamento da demanda ao longo do tempo e do espaço; número de viagens realizadas por linha e por tipo usuário; comparativo da origem da viagem com domicilio do usuário; e recuperação da matriz origem-destino do transporte público