Página 17 dos resultados de 125734 itens digitais encontrados em 0.033 segundos

‣ Community knowledge sharing : an Internet application to support communications across literacy levels; Internet application to support communications across literacy levels

Shakeel, Hani Umar, 1973-
Fonte: Massachusetts Institute of Technology Publicador: Massachusetts Institute of Technology
Tipo: Tese de Doutorado Formato: 121 p.; 9140482 bytes; 9140239 bytes; application/pdf; application/pdf
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by Hani Umar Shakeel.; Thesis (S.M.)--Massachusetts Institute of Technology, Technology and Policy Program, 2001.; Includes bibliographical references (p. 94-98).

‣ Valuing flexibility in infrastructure developments : the Bogota water supply expansion plan.

Ramirez, Natalia, 1973-
Fonte: Massachusetts Institute of Technology Publicador: Massachusetts Institute of Technology
Tipo: Tese de Doutorado Formato: 226 p.; 17921152 bytes; 17920910 bytes; application/pdf; application/pdf
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Thesis (S.M.)--Massachusetts Institute of Technology, Engineering Systems Division, Technology and Policy Program, 2002.; Includes bibliographical references (p. 159-164).

‣ Urban transportation policies toward sustainability of mega-cities

Takayanagi, Mimi, 1970-
Fonte: Massachusetts Institute of Technology Publicador: Massachusetts Institute of Technology
Tipo: Tese de Doutorado Formato: 118 p.; 9763934 bytes; 9763692 bytes; application/pdf; application/pdf
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by Mimi Takayanagi.; Thesis (S.M.)--Massachusetts Institute of Technology, Engineering Systems Division, Technology and Policy Program, 2002.; Includes bibliographical references (p. 109-113).

‣ Benefits of emerging transportation technologies : simulation analysis and policy issues

Cortes, Margaret T. (Margaret Therese), 1974-
Fonte: Massachusetts Institute of Technology Publicador: Massachusetts Institute of Technology
Tipo: Tese de Doutorado Formato: 98 p.; 7067278 bytes; 7067041 bytes; application/pdf; application/pdf
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by Margaret T. Cortes.; Thesis (S.M.)--Massachusetts Institute of Technology, Engineering Systems Division, Technology and Policy Program; and, (S.M. in Transportation)--Massachusetts Institute of Technology, Dept. of Civil and Environmental Engineering, 2003.; Includes bibliographical references (p. 96-98).

‣ A methodology for economic analysis and cost modeling of assembly ramp-up strategies for the automotive industry

Bammi, Siddharth, 1978-
Fonte: Massachusetts Institute of Technology Publicador: Massachusetts Institute of Technology
Tipo: Tese de Doutorado Formato: 69 p.; 4025372 bytes; 4025132 bytes; application/pdf; application/pdf
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by Siddharth Bammi.; Thesis (S.M.)--Massachusetts Institute of Technology, Engineering Systems Division, Technology and Policy Program, 2003.; Includes bibliographical references (p. 61-64).

‣ Web services : a strategic analysis

Shelton, William T. (William Trotter), 1966-
Fonte: Massachusetts Institute of Technology Publicador: Massachusetts Institute of Technology
Tipo: Tese de Doutorado Formato: 83 leaves; 5996592 bytes; 5996351 bytes; application/pdf; application/pdf
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by William T. Shelton, Jr.; Thesis (S.M.M.O.T.)--Massachusetts Institute of Technology, Sloan School of Management, Management of Technology Program, 2003.; Includes bibliographical references (leaves 70-75).

‣ Consistency checks in decision analysis

Outten, Juliet Leigh, 1977-
Fonte: Massachusetts Institute of Technology Publicador: Massachusetts Institute of Technology
Tipo: Tese de Doutorado Formato: 82 leaves; 3025995 bytes; 3034863 bytes; application/pdf; application/pdf
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Given the range of events that can occur at a nuclear power plant throughout its lifetime, the appropriate course of action associated with addressing these events is equally variant. While the issues concerning quantification of the frequency associated with these events can be addressed using reliability models or PSA, the actual path and decisions made concerning the appropriate outcome is not readily obvious. Decisions are made on the basis of importance of cost, health and safety to the decision maker. These decisions include external influences, such as regulation and media attention, as well as internal influences. Using a formalized decision making process, the importance of these factors to the decision maker can be determined utilizing sets of weights and values for cost, health and safety (performance measures). Having assigned weights and values to each performance measure, an integral part of the decision making process is comparing assigned values to ensure consistency. It is useful to examine the "value of a life" in order to perform these consistency or "sanity checks." A case study is performed on decision making for a nuclear power plant and presented reflecting the data collection process for formal decision making with the aid of consistency checks. The formal decision methodology is completed by the consistency checks. Having established consistency checks and completed the analysis through their use...

‣ Computational and biological studies of mechanical prophylaxis against deep venous thrombosis

Dai, Guohao, 1970-
Fonte: Massachusetts Institute of Technology Publicador: Massachusetts Institute of Technology
Tipo: Tese de Doutorado Formato: 151 p.; 8072342 bytes; 8092977 bytes; application/pdf; application/pdf
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Deep vein thrombosis (DVT) of the lower extremity and induced pulmonary embolism are common complications resulting from prolonged periods of bed-rest or immobilization of the limbs. One of the most effective methods of prophylaxis against DVT is external pneumatic compression (EPC). In spite of its wide acceptance as an effective means of prophylaxis, its mechanism remains poorly understood and optimal compression conditions have not been defined. Understanding the biological consequences of EPC is an important goal for optimizing the performance of compression device and providing guidance for clinical use. In the first part of this thesis, a computational model of the leg was developed to simulate hemodynamic conditions under EPC and the influence of different modes of compression were analyzed and compared. Then, a new in vitro cell culture system was developed that can be used to examine the effect of hemodynamic conditions during EPC on endothelial cell (EC) function. The biologic response was assessed through changes in cell morphology and the expression of various pro-thrombotic and anti-thrombotic factors related to EC.; (cont.) The results show that intermittent flow associated with EPC up-regulates EC fibrinolytic potential and vasomotor function. Using DNA microarray technology...

‣ Responses to airport delays : a system study of Newark International Airport

Evans, Antony David, 1977-
Fonte: Massachusetts Institute of Technology Publicador: Massachusetts Institute of Technology
Tipo: Tese de Doutorado Formato: 121 p.; 9423983 bytes; 9439204 bytes; application/pdf; application/pdf
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by Antony David Evans.; Thesis (S.M.)--Massachusetts Institute of Technology, Dept. of Aeronautics and Astronautics; and, (S.M.)--Massachusetts Institute of Technology, Engineering Systems Division, Technology and Policy Program, 2002.; Includes bibliographical references (p. 119-121).

‣ Economic and policy implications of urban air pollution in the United States, 1970 to 2000

Yang, Trent, 1979-
Fonte: Massachusetts Institute of Technology Publicador: Massachusetts Institute of Technology
Tipo: Tese de Doutorado Formato: 85 leaves; 4939452 bytes; 4948678 bytes; application/pdf; application/pdf
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(cont.) over time as pollution levels change. Using these new models, we valued the economic benefit of reduced air pollution due to the Clean Air Act regulations to be over $7 trillion from 1970 to 2000, or 2.1% of aggregate US economic welfare over the period. This does not include the benefits into the future (after 2000) from reduction in mortality due chronic exposure during these years. The economic benefit of those saved mortalities is another $7 trillion using a 3% discount rate. Another calculation is the remaining economic burden of unmitigated pollution levels (actual historical pollution). We estimate this to be approximately $9 trillion over the same period. The $9 trillion burden includes the early mortalities due to chronic exposure to PM before and during this period. While these economic benefits of air pollution regulation are large ($7 trillion), they are considerably less than the $27.6 trillion estimated in EPAs own analysis of the benefits of air pollution regulation. The main difference for our lower estimate is the stock-flow accounting of mortality due to chronic exposure. There are considerable uncertainties in these estimates both because of uncertainties in the relationship between air pollution exposure and the health effects...

‣ Health technology : design of bandage-sized wireless sensors and effect of ambient displays on social support and diabetes management; Design of bandage-sized wireless sensors and effect of ambient displays on social support and diabetes management

Mohan, Akshay, 1979-
Fonte: Massachusetts Institute of Technology Publicador: Massachusetts Institute of Technology
Tipo: Tese de Doutorado Formato: 152 p.; 11662447 bytes; 11682985 bytes; application/pdf; application/pdf
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Health-Zero refers to health technology design that focus on interaction with an individual as a whole to promote well-being. This thesis presents two explorations in the discipline. The first exploration involves the design of a wireless bandage-sized ECG sensor to create a personal and interpersonal network of health sensors. The second exploration designs and evaluates an ambient blood glucose level visualization and feedback system for diabetes self-care and social support, where the latter is provided by a friend or family member of an individual with diabetes. This thesis provides insight into using technology to enable an individual to leverage his environment and inter-personal relationships for self-care and prevention.; by Akshay Mohan.; Thesis (S.M.)--Massachusetts Institute of Technology, School of Architecture and Planning, Program in Media Arts and Sciences, 2004.; Includes bibliographical references (p. 96-100).

‣ Essays in management of technology : collaborative strategies for the American technology industries; Collaborative strategies for the American technology industries

Liu, Wenyun, 1971-
Fonte: Massachusetts Institute of Technology Publicador: Massachusetts Institute of Technology
Tipo: Tese de Doutorado Formato: 129 leaves; 12451247 bytes; 12451005 bytes; application/pdf; application/pdf
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by Wenyun Liu.; Thesis (Ph.D.)--Massachusetts Institute of Technology, Dept. of Political Science, 2000.; Includes bibliographical references.

‣ Modeling of the biomechanics of posture and balance

Riley, Patrick O. (Patrick Owen)
Fonte: Massachusetts Institute of Technology Publicador: Massachusetts Institute of Technology
Tipo: Tese de Doutorado Formato: [1], ii, 297 [i.e. 298] leaves; 13312953 bytes; 13312712 bytes; application/pdf; application/pdf
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by Patrick O. Riley.; Thesis (Ph. D.)--Massachusetts Institute of Technology, Division of Health Sciences and Technology, 1988.; Title as it appeared in M.I.T. Graduate List, February 1988: Modeling the biomechanics of posture and balance.; Bibliography: leaves 172-176.

‣ Bringing policy into space systems conceptual design : qualitative and quantitative methods

Weigel, Annalisa L. (Annalisa Lynn), 1972-
Fonte: Massachusetts Institute of Technology Publicador: Massachusetts Institute of Technology
Tipo: Tese de Doutorado Formato: 168 p.; 15537090 bytes; 15536849 bytes; application/pdf; application/pdf
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A change in government policy can send waves of crippling impacts through the design and development of publicly funded complex engineering systems. Thus it is important for system architects and designers to understand the interaction of policy with their systems, and to strive for policy robustness in their systems. To be policy robust is to successfully pass through policy changes that might arise during the course of system development in order to bring the system into operational use. The goal of this thesis research is to enable the creation of policy robust system architectures and designs through making policy an active consideration in the engineering systems architecting and design process. Qualitative and quantitative analysis methods are brought to bear on the problem using space systems as the application domain, and a process is set down through which policy can become an active consideration instead of a static constraint. Unique contributions of this thesis in the qualitative analysis of policy robust systems include new heuristics describing the interaction of policy and publicly funded engineering systems, as well as impact flow path diagrams for tracing policy interactions with technical engineering system parameters. Quantitative contributions include general relationships for the behavior of engineering system architecture sets under downward annual budget policy pressure...

‣ Product development process design : improving development response to market, technical, and regulatory risks

Unger, Darian W. (Darian William), 1973-
Fonte: Massachusetts Institute of Technology Publicador: Massachusetts Institute of Technology
Tipo: Tese de Doutorado Formato: 205 leaves; 20296846 bytes; 20296607 bytes; application/pdf; application/pdf
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Engineering companies frequently face product development challenges. Competitive pressures, industrial or societal innovations, and government regulations are some of the many factors that drive the need for new or better products. Companies respond to these drivers and changing needs by developing new products and employing product development processes (PDPs) to coherently manage the risks inherent in their development. Well-designed PDPs reduce development time, create better products, generate profit, and increase market share. In contrast, poorly-designed PDPs can severely harm both product lines and the companies that manufacture them. Many companies seek guidance in making important PDP design decisions. This thesis introduces PDPs as risk management frameworks. The research investigates the relationship between PDPs and risk management and seeks to help companies improve PDP design. It begins by discussing the drivers and risks of product development and then describes different PDPs. The traditional stage gate process is compared with the modified waterfall process, evolutionary prototyping, evolutionary delivery, design to schedule/budget process, the spiral process, and several other PDP variations. The research then proposes several iteration- and review-based metrics by which PDPs can be more effectively identified and compared. Ten company case studies exemplify a wide variety of actual PDPs...

‣ The Voice Web : a strategic analysis

Pearah, David E., 1973-
Fonte: Massachusetts Institute of Technology Publicador: Massachusetts Institute of Technology
Tipo: Tese de Doutorado Formato: 255 p.; 12394987 bytes; 12394788 bytes; application/pdf; application/pdf
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by David E. Pearah.; Thesis (S.M.)--Massachusetts Institute of Technology, Engineering Systems Division, Technology and Policy Program, February 2002.; Includes bibliographical references.

‣ Engineering and policy analysis of strategic and tactical options for future aerospace traffic management

Falker, John M
Fonte: Massachusetts Institute of Technology Publicador: Massachusetts Institute of Technology
Tipo: Tese de Doutorado Formato: 128 p.; 7238178 bytes; 7237987 bytes; application/pdf; application/pdf
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Current space launch/landing events are conducted only within Special Use Airspace (SUA), separate from air traffic. This is a strategic traffic management policy because SUA size and duration are set well in advance. It forces space operations to disrupt aviation, which could become costly with growth in air or space transportation. This was investigated through integrated engineering/policy analysis of strategic and tactical options. Total annual disruption cost was calculated using the number of conflicts per SUA event, the annual SUA events, the average disruption per conflict, and the cost per unit disruption. The conflict count was identified as most important, and an analytical airspace conflict model was developed to predict the number of conflicts associated with restricting an arbitrary region of airspace for a given duration. This approach was used to investigate the sensitivity of disruption cost to SUA radius, SUA active duration, air traffic density, relative velocity, annual SUA events, and conflict resolution distance. The current annual cost is under $1 million, but the expected ranges of all factors comprise a plausible range of $100 to $8 million. This cost was most sensitive to SUA radius: on average, doubling the radius multiplies the cost by 49...

‣ Policies to manage electronics waste : an analysis of US and EU regulatory initiatives

Nickerson, William Arthur, 1971-
Fonte: Massachusetts Institute of Technology Publicador: Massachusetts Institute of Technology
Tipo: Tese de Doutorado Formato: 139 p.; 9597823 bytes; 9597631 bytes; application/pdf; application/pdf
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by William Arthur Nickerson.; Thesis (S.M.)--Massachusetts Institute of Technology, Engineering Systems Division, Technology and Policy Program, 2002.; Includes bibliographical references (p. 128-139).

‣ Welfare distortions of climate change policies

Tay, Kok Hou, 1978-
Fonte: Massachusetts Institute of Technology Publicador: Massachusetts Institute of Technology
Tipo: Tese de Doutorado Formato: 30 leaves; 1031407 bytes; 1031216 bytes; application/pdf; application/pdf
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The economic cost of reducing greenhouse gas (GHG) emission is an important policy consideration. As public awareness of climate change consequences increase, there is increased political support for greenhouse gas emission controls. However, there are disagreements over the intensity of controls as well as the implementation timeline. A major factor of consideration is the economic cost. Due to the complexity of the climate change issue, many people have chosen to focus on the carbon equivalent quota price as a proxy for the magnitude of cost. While the carbon price is a helpful guide, it provides an incomplete picture of all the distortions and their interactions. This thesis aims to break down the different components of welfare loss in computer general equilibrium (CGE) models, so as to further understand the issue. The MIT Emissions Prediction and Policy Analysis (EPPA) model, a large-scale computable general equilibrium (CGE) model, simulates trends in global economics and greenhouse gas emissions. Utilizing the EPPA model, I examined the distortions resulting from carbon taxation, domestic taxation, changes in terms of trade, international oil market effect, and international capital flow. This thesis focused on Japan and the European Union...

‣ Stakeholder-assisted modeling and policy design for engineering systems

Mostashari, Ali, 1974-
Fonte: Massachusetts Institute of Technology Publicador: Massachusetts Institute of Technology
Tipo: Tese de Doutorado Formato: 462 p.; 32174640 bytes; 32238043 bytes; application/pdf; application/pdf
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There is a growing realization that stakeholder involvement in decision-making for large- scale engineering systems is necessary and crucial, both from an ethical perspective, as well as for improving the chances of success for an engineering systems project. Traditionally however, stakeholders have only been involved after decision-makers and experts have completed the initial decision-making process with little or no input from stakeholders. This has resulted in conflict and delays for engineering systems with brilliant technical designs that do not address the larger context of the broader social goals. One of the fears of experts is that the involvement of stakeholders will result in technical solutions that are of poor quality. The hypothesis of this research is that an effective involvement of stakeholders in the decision-making process for engineering systems from the problem definition stage through the system representation can produce a system representation that is superior to representations produced in an expert-centered process. This dissertation proposes a Stakeholder-Assisted Modeling and Policy Design (SAM-PD) process for effectively involving stakeholders in engineering systems with wide-ranging social and environmental impact. The SAM-PD process is designed based on insights from existing engineering systems methodologies and alternative dispute resolution literature. Starting with a comprehensive analysis of engineering systems methodologies...