• Refine Query
  • Source
  • Publication year
  • to
  • Language
  • 5
  • 3
  • 1
  • 1
  • Tagged with
  • 10
  • 4
  • 4
  • 3
  • 3
  • 3
  • 3
  • 2
  • 2
  • 2
  • 2
  • 2
  • 2
  • 2
  • 2
  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
1

The gyroscopic stabilization of land vehicles

Ross, James Frederick Stanley. January 1933 (has links)
Thesis (Ph. D.)--University of London, 1931. / "Bibliography and list of patents": p. 160-161.
2

Analýza systémov nekonvenčnej dopravy a ich využitie v praxi / Analysis of non-conventional transport systems and the practical use

Krippel, Michal January 2008 (has links)
The diploma thesis describes and compares various kinds of non-conventional transport, analyzes its differences and its use in the praxis. The main goal is to designate, when is the certain kind of non-conventional transport suitable, if is compared with conventional transport, or with each other. The conclusion describes the analysis of the evolution and the future trend of growth in the field of non-conventional transport.
3

Analysis, design, optimisation and testing of a gyroscopically stabilized platform

Redwood, Benjamin Philip January 2014 (has links)
Gyroscopic stabilization can be used to maintain an otherwise unstable body in an upright position. Devices equipped with gyroscopes can balance upon a small area or point without falling over when the gyroscopic stabilizing force is greater than a rotational force or moment from an out-of-balance load that causes the device to tip. A new concept for a gyroscopically stabilized platform has been proposed in the form of a schematic diagram. The proposed system comprises of four interconnected gyroscopes that react to the tipping of an inherently unstable external body. The purpose of this research is to evolve a design for, and establish the feasibility of building the proposed stable platform using available materials and technology. If feasible, the gyroscopically stabilized platform will be made at the most practical and economic size. Louis Brennan developed a 37 tonne monorail that was maintained in the upright position with two 3 tonne counter rotating gyroscopes. The Brennan monorail is analysed to better understand the behaviour of a similar coupled gyroscopic stabilization system. The reactions between the components that maintain the monorail in the stable position are studied and comparisons are made between the proposed stable platform and the Brennan system. A mathematical analysis of the proposed system is presented. The equations of motion for the system are derived using the Lagrangian Formalism. The characteristic equation of the system is then determined and from this a set of stability conditions imposed on the design of the physical parameters of the stable platform. The general solutions to the equations of motion are then derived. Expressions that model the behaviour of two of the variables that describe the motion of the stable platform are determined. A systematic approach is adopted for establishing a new concept for the proposed system. Testing of the initial stable platform prototype (Prototype A) showed the system did not behave as intended. The platform was optimised further and this resulted in a second prototype, Prototype B. Prototype B exhibiting the desired oscillatory motion about the vertical of the platform. Predictions made using the mathematical model are compared with empirical results. The mathematical model was found to be an accurate method for predicting the response of the stable platform.
4

Monorail: An Alternative Transportation Mode For Metu

Gokbulut, Alev 01 September 2003 (has links) (PDF)
The aim of this thesis is to investigate an alternative mode of transportation for METU and the impacts of spatial transformations generated by the proposed system in an architectural context. This study embraces modern concepts of space-time in the practice of architectural design, and involves a sensitive consideration of the perception of space relative to position, speed and movement. In an urban context, the thesis unfolds spatial transformations affected by new movement technology. While the notions of movement and speed fundamentally shape the image of the contemporary city, METU campus will be reanalyzed within this framework.
5

Assessment of integrity of reasoning in large-scale decision systems application to public transit investment project evaluation /

Mangalpally, Sharat C. January 2005 (has links)
Thesis (M.C.E.)--University of Delaware, 2006. / Principal faculty advisor: Shinya Kikuchi, Dept. of Civil & Environmental Engineering. Includes bibliographical references.
6

Multi-criteria Feasibility Assessment Of The Monorail Transportation System In Metu Campus

Tarighi, Amin 01 March 2010 (has links) (PDF)
The overall objective of this thesis is to assess the financial, technical and social feasibility of investing in modern Automated People Movers (APM) transportation systems, generally known as monorails, in METU campus which presents a unique opportunity to fulfill the modern-day transportation needs of METU campus. This study complements the Presidency Office&rsquo / s long term goal to integrate environmental, social and economic sustainability into the policies, practices and culture of the university and ultimately reduce the consumption of all resources on campus and traffic congestion and accidents. In this context, the consequent cost-benefit effects of the proposed monorail system on campus life were quantified in monetary expressions and the corresponding multi-criteria feasibility assessment including: Break-even Analysis, Cost Effectiveness Assessments and Cost Benefit Analysis have been done successfully. According to these analyses the overall capital cost of system is $46.5 million which covers the 24 months project construction period, and an additional annual operating and maintenance cost of $2 million will span the 30 year project life time. Three different scenarios were proposed for financing the project and relevant break-even points were determined for each of the scenarios. Eventually, it appears that based on the evaluations, constructing such a transit system in METU campus will be cost effective and will certainly enhance the transportation, and will contribute to the institutional improvements and environmental preservation schemes of METU campus.
7

O USO DA TECNOLOGIA DE MONOTRILHO COMO ALTERNATIVA DE TRANSPORTE URBANO NA REGIÃO METROPOLITANA DE GOIÂNIA. / The Use of Technology Monorail as an Alternative Urban Transport in the Metropolitan Area of Goiânia.

Souza, Fábio de 29 June 2012 (has links)
Made available in DSpace on 2016-08-10T10:49:50Z (GMT). No. of bitstreams: 1 FABIO DE SOUZA.pdf: 2499811 bytes, checksum: 7aa00c4ad11dc6a9f25197941d591ed8 (MD5) Previous issue date: 2012-06-29 / One of the approaches of the term mobility lays upon the link between urban planning, transit and transportation, and the elements and technologies that facilitate the commuting of people and goods throughout the city. Lately, transportation and traffic have become in both, mid-sized and big cities, a barrier to urban and regional development, due to various antagonistic situations experienced when commuting. Management efforts are engendered by the government in an attempt to find solutions for the matter have proved ineffective so far. The city of Goiânia is a city-center hub of activities of a Metropolitan Area, a region with a population of an estimated 2,206,134 residents (IBGE, 2011), and 1,000,000 vehicles cruising its road system (DETRAN, 2001). The struggle for room in the lanes, among passenger cars, freight and passenger transport, is already noticeable during peak hours. The saturation level of the system undermines the effective public passenger transportation. In turn, the management of a Passenger Public-Transportation System that is effectively integrated has failed to reach satisfactory results, considering the organizational traits that have been put in action up to now. This paper proposes an analysis of the deployment of the monorail technology in the Integrated Passenger Public-Transportation in the metropolitan area of Goiânia, by means of a methodology of cost-benefit analysis, depicting a brief characterization of monorail technology, a database on the transport system and the definition of a basic layout of metro route in territorial space. As a product, the result of cost-benefit analysis proposes a basic model of monorail technology implementation in the Metropolitan Public Transport Network in Goiânia, noting advantages and disadvantages of such a model. Last, but not least, final considerations about the methodology and the proposed model will be discussed. / Uma das abordagens do termo mobilidade tem como parâmetro a relação entre o espaço urbano territorial, o trânsito e os transportes e os elementos e tecnologias facilitadoras de deslocamentos de pessoas e bens. Os transportes e o trânsito têm se tornado atualmente, em cidades de médio e grande porte, um entrave ao desenvolvimento urbano e regional face às diversas situações antagônicas vivenciadas no contexto dos deslocamentos. Modelos de gestões são engendrados com a finalidade de buscar soluções, por parte da administração pública. Na cidade de Goiânia, município pólo-concentrador de atividades da Região Metropolitana de Goiânia, região com população estimada pelo IBGE, em 2011, de 2.206.134 habitantes e estimados 1.000.000 de veículos circulando em seu sistema viário, o embate pelo espaço nos leitos das vias entre veículos de passeio, de cargas e de transporte de passageiros, já permite uma visualização, nos horários de pico e em algumas regiões, do nível de saturação do sistema, o que compromete o transporte público de passageiros. Por sua vez, o modelo de gestão do Sistema de Transporte Público de Passageiros, efetivamente metropolitano e integrado, não tem conseguido alcançar metas satisfatórias em seus planos de ações tendo em vista suas características organizacionais. O presente trabalho propõe uma análise da inserção do uso da tecnologia monotrilho no Sistema Integrado de Transporte Público de Passageiros da Região Metropolitana de Transporte Coletivo de Goiânia, através da metodologia de análise custo benefício, a partir de uma caracterização sucinta da tecnologia monotrilho, de uma base de dados sobre o sistema e da definição de um traçado básico de itinerário no espaço territorial metropolitano.
8

Avaliação energética, econômica e socioambiental de alternativas para sistemas de transportes urbanos coletivos a partir do modelo de apoio multicritério à decisão / Energy, economic and socio-environmental evaluation of alternatives for urban transport systems based on the multicriteria decision support model.

Pedroso, Guilherme 15 December 2017 (has links)
Essa pesquisa tem como foco a tomada de decisão para a escolha de modais de transporte urbano coletivo e analisa os desempenhos operacionais e funcionais dos sistemas Bus Rapid Transit (BRT), Veículo Leve sobre Trilhos (VLT) e Monotrilho. Um modelo de apoio multicritério à decisão (AMD) em cenários complexos é utilizado na análise e tem como dados de entrada as preferências subjetivas de agentes de decisão (stakeholders) e os desempenhos objetivos e subjetivos dos três modais com relação a um sistema de cinco critérios e 22 subcritérios. Tal sistema cobre os eixos de eficiência energética, custo, viabilidade econômica e financeira, qualidade da viagem e impactos ambientais. Stakeholders selecionados com perfis de operador, vizinho, usuário, fornecedor de equipamentos e serviços e consultor em transportes urbanos atribuem suas preferências, pontuando-as em escala numérica de 1 a 9. Visando a aplicação do modelo na região da cidade de São Paulo, foram coletadas 138 opiniões de preferências através de formulários de avaliação e entrevistas conduzidas nessa região. Cada um dos três modais, após ser configurado para atender aos requisitos operacionais e funcionais do serviço de transporte definido por uma unidade funcional comum, tem os seus desempenhos com relação ao mesmo conjunto de critérios e subcritérios pontuados em uma escala numérica. Um índice global (IG), que define a prioridade de cada alternativa, é obtido pela agregação das preferências e desempenhos com uma função aditiva. O modelo foi aplicado em um estudo de caso que simulou a operação dos três modais no trecho entre as estações Vila Prudente e São Mateus da Linha 15 do Metrô de São Paulo, cujos requisitos definiram a unidade funcional. Dentro dos limites e premissas estabelecidas para o estudo de caso, os índices globais calculados indicaram a preferência pelo modal Monotrilho, seguido, na ordem, pelo VLT e BRT. / This research focuses on decision-making support methods to choice public urban transport modes and analyzes the operational and functional performances of the Bus Rapid Transit (BRT), Light Rail Transit (LRT) and Monorail systems. A multicriteria decision aided model (MDAM) in complex scenarios is used in the analysis and has as input data the subjective preferences of stakeholders and the objective and subjective performances of the three modalities in relation to a set of five criteria and 22 subcriteria. This system covers the axes of energy efficiency, cost, economic and financial feasibility, travel quality and environmental impacts. Stakeholders selected with profiles of operator, neighbor, user, equipment and service provider and consultant in urban transport assign their preferences, scoring them on a numerical scale from 1 to 9. In order to apply the model in the region of the city of São Paulo, 138 opinions were collected through evaluation forms and interviews conducted in that region. Each of the three modes, once configured to meet the operational and functional requirements of the transport service defined by a common functional unit, has its performances against the same set of criteria and subcriteria scored on a numerical scale. A global index (GI), which defines the priority of each alternative, is obtained by aggregating the preferences and performances according to an additive function. The MDAM model was applied in a case study that has simulated the operation of the three transport modalities in the stretch between the stations Vila Prudente and São Mateus of the Line 15 of the São Paulo Metro, whose general requirements did define the functional unit of the case. Within the limits and assumptions defined for the case study, the calculated global indices indicated the first preference for the Monorail modal, followed, in sequence, by the LRT and BRT.
9

Klaipėdos miesto subalansuota susisiekimo sistema / Sustainable transportation system in Klaipeda City

Dambrauskienė, Daiva 21 July 2004 (has links)
The subject of the work is Sustaqinable transportation system in Klaipeda city. The work covers the analysis of the importance of the transportation system in Klaipeda city in the context of global transportation system in Lithuania and EU. It provides with a number of soliutions corresponding to the provisions of White Paper on European Transport policy for 2010 and designed to achieve the sustainability of the existing transportation system. The progressive management of the transportation system invoking strategies and principles of the sustainable policy is proposed as one of the main soliutions for sustainable transportation. The establishment of a unified automatic ticketing system and an innovative transport mode is also proposed for the optimization of the operation of public transport in Klaipeda city. The work includes the research on the formation and the structure of parking places in the central part of Klaipeda city. The action plan and detailed, feasible solutions are proposed for the systematic development of the parking places. Sustainabgle transportation system in Klaipeda city is shaped with a view of creating proper conditions for both society and environment, harmonizing their interaction, and proposing strategy of sustainable transportation system suitable for unique surroundings of the city.
10

Avaliação energética, econômica e socioambiental de alternativas para sistemas de transportes urbanos coletivos a partir do modelo de apoio multicritério à decisão / Energy, economic and socio-environmental evaluation of alternatives for urban transport systems based on the multicriteria decision support model.

Guilherme Pedroso 15 December 2017 (has links)
Essa pesquisa tem como foco a tomada de decisão para a escolha de modais de transporte urbano coletivo e analisa os desempenhos operacionais e funcionais dos sistemas Bus Rapid Transit (BRT), Veículo Leve sobre Trilhos (VLT) e Monotrilho. Um modelo de apoio multicritério à decisão (AMD) em cenários complexos é utilizado na análise e tem como dados de entrada as preferências subjetivas de agentes de decisão (stakeholders) e os desempenhos objetivos e subjetivos dos três modais com relação a um sistema de cinco critérios e 22 subcritérios. Tal sistema cobre os eixos de eficiência energética, custo, viabilidade econômica e financeira, qualidade da viagem e impactos ambientais. Stakeholders selecionados com perfis de operador, vizinho, usuário, fornecedor de equipamentos e serviços e consultor em transportes urbanos atribuem suas preferências, pontuando-as em escala numérica de 1 a 9. Visando a aplicação do modelo na região da cidade de São Paulo, foram coletadas 138 opiniões de preferências através de formulários de avaliação e entrevistas conduzidas nessa região. Cada um dos três modais, após ser configurado para atender aos requisitos operacionais e funcionais do serviço de transporte definido por uma unidade funcional comum, tem os seus desempenhos com relação ao mesmo conjunto de critérios e subcritérios pontuados em uma escala numérica. Um índice global (IG), que define a prioridade de cada alternativa, é obtido pela agregação das preferências e desempenhos com uma função aditiva. O modelo foi aplicado em um estudo de caso que simulou a operação dos três modais no trecho entre as estações Vila Prudente e São Mateus da Linha 15 do Metrô de São Paulo, cujos requisitos definiram a unidade funcional. Dentro dos limites e premissas estabelecidas para o estudo de caso, os índices globais calculados indicaram a preferência pelo modal Monotrilho, seguido, na ordem, pelo VLT e BRT. / This research focuses on decision-making support methods to choice public urban transport modes and analyzes the operational and functional performances of the Bus Rapid Transit (BRT), Light Rail Transit (LRT) and Monorail systems. A multicriteria decision aided model (MDAM) in complex scenarios is used in the analysis and has as input data the subjective preferences of stakeholders and the objective and subjective performances of the three modalities in relation to a set of five criteria and 22 subcriteria. This system covers the axes of energy efficiency, cost, economic and financial feasibility, travel quality and environmental impacts. Stakeholders selected with profiles of operator, neighbor, user, equipment and service provider and consultant in urban transport assign their preferences, scoring them on a numerical scale from 1 to 9. In order to apply the model in the region of the city of São Paulo, 138 opinions were collected through evaluation forms and interviews conducted in that region. Each of the three modes, once configured to meet the operational and functional requirements of the transport service defined by a common functional unit, has its performances against the same set of criteria and subcriteria scored on a numerical scale. A global index (GI), which defines the priority of each alternative, is obtained by aggregating the preferences and performances according to an additive function. The MDAM model was applied in a case study that has simulated the operation of the three transport modalities in the stretch between the stations Vila Prudente and São Mateus of the Line 15 of the São Paulo Metro, whose general requirements did define the functional unit of the case. Within the limits and assumptions defined for the case study, the calculated global indices indicated the first preference for the Monorail modal, followed, in sequence, by the LRT and BRT.

Page generated in 0.0278 seconds