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Thesis (M.C.P.)--Massachusetts Institute of Technology, Dept. of Urban Studies and Planning, 2009. / Author also earned an Urban Design Certificate from the Program in Urban Design; a joint graduate program with the Dept. of Architecture and the Dept. of Urban Studies and Planning. Vita. / Includes bibliographical references (p. 174-179). / As currently conceived, the contemporary city will not advance beyond its present level of achievement. This research frames the city within three root values upon which all decisions made in the city are based. The three root values are continuity, connection and openness. Under the present priorities of city making, the contemporary city is heavily biased toward continuity. A paradigm shift is required in the way cities are conceived and developed to rebalance the three root values with the intention of creating cities that are better places for humans to inhabit. This shift is a call for a more human city. This research investigates a collection of urban design principles that are intended to humanize the city and improve them as settings for human use and occupation. The research utilizes the festival as a temporal moment in the city of uniquely human-centered use. It is a moment in which the human becomes the dominant priority in the organization and occupation of space, while other systems of the city are temporarily interrupted. Through a series of six festival case studies a number of consistent adaptations of space emerge in which the festive events highlight strategies for humanizing space in the city. The urban design principles highlighted by this research include adapting spatial containment, restructuring movement, exposing meaning and commonality, attracting density of people, removing separation of uses, increasing overlapping activities, and spatially and temporally scripting and choreographing all of these strategies. / (cont.) These principles are then examined through a design test that shows their applicability in making humanizing adaptations of space and ultimately creating more human cities. / by Joshua Charles Fiala. / M.C.P.

Thesis (M.C.P.)--Massachusetts Institute of Technology, Dept. of Urban Studies and Planning, 2009. / Author also earned an Urban Design Certificate from the Program in Urban Design; a joint graduate program with the Dept. of Architecture and the Dept. of Urban Studies and Planning. / Includes bibliographical references. / Modern streetcars are making a comeback in the United States after their disappearance in the mid twentieth century. They resemble their distant relative, also known as the trolley, in many ways but express a contemporary, provide modern conveniences, and act as a magnet for redevelopment within the city. Modern streetcars build on the theory behind the European tram systems and provide desirable transportation options to support a range of densities in urban living. Currently in the United States, Portland, OR and Seattle,WA operate one modern streetcar line and have plans to expand their singular line into a network. Using these two routes, the plans for system expansion, and the individual cities that support them as case studies, this thesis analyzes the potential for streetcars to return to Denver, CO.The analysis for the Mile High City was conducted using my knowledge of and research on Denver and the surrounding metropolitan region, its historical skeleton that developed around the streetcar, and the City's current trends in public transportation and planning processes. Based on a multifaceted analysis that includes studying the relationship of potential streetcar route length, multi-modal connections, major destinations, high bus ridership routes, projected residential density, projected employment density, and redevelopment potential based on use and zoning, Denver is in fact an appropriate city for the return of streetcars. / (cont.) Not only would one streetcar be successful, but an integrated system could serve the City and its surrounding urban neighborhoods well. Taking the analysis one step further, the research attempts to compare a potential modern streetcar system for Denver with the historic streetcar routes that operated until 1949. Many observations arise, including the obvious difference in the limited number of modern lines versus the vast number of historic routes. Modern streetcars typically occur on primarily mixed-use corridors rather than pass through strictly residential neighborhoods as they once did. It is also evident that modern streetcars in Denver would direct redevelopment within the city whereas historic streetcars directed development to the edge of the city.This ability to direct development and redevelopment within the city's boundaries in addition to providing transportation fit in line with Denver's goals for growth management, multi-modal transportation options, and neighborhood revitalization. / by Sarah E. Snider. / M.C.P.

Thesis (M.C.P.)--Massachusetts Institute of Technology, Dept. of Urban Studies and Planning, 2009. / Author also earned an Urban Design Certificate from the Program in Urban Design; a joint graduate program with the Dept. of Architecture and the Dept. of Urban Studies and Planning. / Includes bibliographical references (p. [151]-[156]). / Surface parking lots occupy vast amounts of land in urbanized areas-at times covering up to 40% of land in downtown areas in the United States. It is estimated that there are seven parking spaces for every vehicle in the nation; given that a vehicle can be in only one place at any given time, there are underutilized, vacant parking spaces all around us. This thesis argues that vacant parking spaces create an opportunity for more intense use of the land. It investigates which types of surface parking lots are best suited for which types of activities, based on physical design characteristics, multiple-use considerations, and a zoning and regulatory framework. It recommends the most attention is given to parking lots in neighborhood commercial areas and large surface parking lots that occupy entire city blocks. The thesis argues for the creation of more part-time public spaces through the use of underutilized parking lots. This argument is partially based on public spaces' social benefits, increased economic development potential, linkages with increased public health, and aesthetic-related benefits. Issues raised in creating public spaces on parking lots (both public and private lots) are addressed and possible approaches to overcome these obstacles are suggested. Strategies for creating more use on surface parking lots are identified from a municipal perspective, for those who coordinate events on parking lots, parking lot owners, and for developers. / (cont.) The thesis concludes with a discussion on implementation of creating more use on surface parking lots through zoning standards, design guidelines, and publicity strategies. The thesis concluded with a theoretical discussion on the ideal types of conditions for increased use on surface parking lots. The overarching finding is that the challenge of constructing more use on surface parking lots is primarily an issue of having the will to work through the necessary bureaucratic codes and regulations; by posing strategies to help facilitate this process, a palette of ideas for creating more use on surface parking lots can be utilized by any interested stakeholders. / by Kathleen Kane Ziegenfuss. / M.C.P.

In recent years, with the prevailing of outdoor activity, the bicycle has already become one of the most attractive products on equipment market of the outdoor activity, the bicycle styles on the market are numerous at present, but after most products still introduce the new car fund with the leading brand industry person, other same trades and then imitate with its products. Thesis this purpose lie in use concept , project of design method, put forward one systematized two design theory , bicycle of system. Investigate the basic demand for the business bicycle at first, carry on the performance specification of setting up two bicycles system of the decision¡FSecondly the structure of the frame selected separately, ago it suspend organization in midair, after suspend by organization, handlebar in midair it adjust there aren't device ; Use morphology matrix to solve systematically finally, set up the procedure of formating at the same time , solve the system formated and specify to design.

Silicon Germanium (Si1-xGex) is an alloy semiconductor that has caught considerable attention of the semiconductor industry in the past decade. Effects of strain in thin films are the reason for this. Strain leads to considerable deformation of bands providing enhanced mobility for both electrons and holes. Another important aspect of SiGe is the reduction of band gap. This makes band gap engineering feasible in all silicon technology. Yet another attractive point is the adaptability and compatibility of SiGe to silicon process technology.In CMOS circuits the p-channel MOSFET needs more than double the area of the n-channel MOSFET due to the lower mobility of holes in silicon. Hence a p-channel hetero MOSFET (HMOSFET) is chosen as the object of this dissertation.A simple general device structure that can provide considerable enhancement in performance, compared to a conventional MOSFET, is selected. A one dimensional Poisson equation is solved for this hetero junction device. Using these results an Excel spreadsheet is used as a tool to design a complete analytical program that can provide internal as well as terminal parameters of this device. The analytical program is tested by comparing the results with ISE-TCAD numerical device simulator results. The results were found to match very well. This analytical program yields results in a fraction of the time compared to numerical programs. For the device of choice variable parameters are identified. It is found that these parameters are interconnected in many ways and trade offs between them need to be applied.From the front end of the spreadsheet input parameters can be varied and parameters like potentials, hole density and terminal characteristics can be plotted very easily while simultaneously computing other parameters like threshold voltage and saturation current.The main contribution of this dissertation research is(1) Development of a very efficient and accurate analytical program to interactively design and optimize a p-channel HMOSFET(2) A detailed understanding and explanation of various design parameters, their implications, interdependency and trade offs(3) Study and explanation of certain special characteristics ofp-HMOSFET like dual threshold voltage, low off-currents, structural limitations etc.

Thesis (S.M. in Technology and Policy)--Massachusetts Institute of Technology, Engineering Systems Division; and, (M.C.P.)--Massachusetts Institute of Technology, Dept. of Urban Studies and Planning, 2010. / This electronic version was submitted by the student author. The certified thesis is available in the Institute Archives and Special Collections. / Cataloged from student submitted PDF version of thesis. / Includes bibliographical references (p. 91-94). / Carbon capture and sequestration (CCS) is a technology that can significantly reduce power sector greenhouse gas (GHG) emissions from coal-fired power plants. CCS technology is currently in development and requires higher construction and operating costs than is currently competitive in the private market. A question that policymakers and investors have is whether a CCS plant will operate economically and be able to sell their power output once built. One way of measuring this utilization rate is to calculate capacity factors of possible CCS power plants. To investigate the economics of CCS generation, a marginal cost dispatch model was developed to simulate the power grid in the Western Interconnection. Hypothetical generic advanced coal power plants with CCS were inserted into the power grid and annual capacity factor values were calculated for a variety of scenarios, including a carbon emission pricing policy. I demonstrate that CCS power plants, despite higher marginal costs due to the operating costs of the additional capture equipment, are competitive on a marginal cost basis with other generation on the power grid at modest carbon emissions prices. CCS power plants were able to achieve baseload level capacity factors with $10 to $30 per ton-CO2 prices. However, for investment in CCS power plants to be economically competitive requires that the higher capital costs be recovered over the plant lifetime, which only occurs at much higher carbon prices. To cover the capital costs of first-of-the-kind CCS power plants in the Western Interconnection, carbon emissions prices have been calculated to be much higher, in the range of $130 to $145 per ton-CO2 for most sites in the initial scenario. Two sites require carbon prices of $65 per ton-CO2 or less to cover capital costs. Capacity factors and the impact of carbon prices vary considerably by plant location because of differences in spare transmission capacity and local generation mix. / by Gary Shu. / M.C.P. / S.M.in Technology and Policy

Denna uppsats undersöker hur kommuner arbetar med bostadsförsörjning och vilka krav kommunerna ställer på gestaltningen och utformningen på ny bebyggelse för att passa in i kommunens vision. Många av Sveriges kommuner arbetar aktivt med förtätning av sina redan utvecklade områden. I samband med detta krävs ett större fokus på hur kommunerna ska arbeta med gestaltning för att byggnaderna ska passa in i den befintliga miljön. Samtidigt finns det nationella krav som avgör hur många bostäder som ska färdigställas och att alla olika typer av hushåll, när det gäller till exempel storlek och sociala förhållanden, måste ha tillgång till ett hem. Hur fungerar detta i praktiken? Hur kan kommunerna arbeta för att skaffa bostäder för alla samtidigt som de fokuserar på arkitektur och design? Denna jämförande studie visar att Tyresö och Nacka kommuner har olika sätt att belysa arkitektur och gestaltning. Båda kommunerna prioriterar gestaltning och det visas genom deras arbete med kvalitetsprogram och/eller gestaltningsprogram i varje projekt. Nacka har också skapat en arkitekturpolicy som genomsyrar projekten eller utgör grunden för de dokument som produceras inom projekten. Deras försök att bygga för alla typer av hushåll syns tydligt i de många nybyggda projekt. Hur arkitektur och gestaltning eventuellt höjer boendeutgifter eller på annat sätt påverkar den framtida bostadsägaren/bostadshyresgästen har inte undersökts tillräckligt i denna studie, även om vissa tendenser visar på att en del arkitektoniska krav kan komma att påverka hyresavgiften och bostadspriserna. Det är svårt med resultatet i denna studie att motivera på vilket sätt som arkitekturpolitiken påverkar bostadsförsörjningen och det är en fråga som borde undersökas vidare. Resultatet visar dock tendenser på att kommunerna väljer när arkitektur ska få vara en stor del av projekten och inte. I centrala lägen läggs fokus på detaljspecifika krav och skapandet av en levande stadsmiljö i omgivningen. För de resurssvaga hushållen väljer kommunerna att främst arbeta för att få projekten att passa in i den stora helheten hellre än att ställa krav på detaljer. / This essay investigates how two of the municipalities of Sweden works with housing supply and which demands they place on the design and the formation of new buildings to fit in with the vision of the municipalities. Many of the municipalities of Sweden are actively working with densification of their already developed areas. In connection with this, a greater focus is required on how the municipalities should work with design for the buildings to fit into the existing environment. At the same time, there are requirements nationally which determine how many homes are to be completed and that all different types of households in terms of, for example, size and social conditions must have access to a home. How does this work in practice? How can the municipalities work to provide housing for everyone while increasing the focus on architecture and design? This comparative study shows that the municipality of Tyresö and the municipality of Nacka have different approaches to highlight architecture and design. Both municipalities prioritize design and it’s shown by their work with quality programs or design programs, or both, in every project. Nacka has also created an architecture policy that will permeate the projects or form the basis for the documents produced within the projects. Their attempt to build for all types of households is clearly seen in the variety of newly build projects. How architecture and design complicate, raises prices or in other affects the projects is not clear in this study.  Based on this result, it’s hard to motivate in what way the architectural policy affects the housing supply, and this is something which should be further investigated. The result shows tendencies that the municipalities choose when architecture should be a large part of the projects and not. In central locations, the focus is on specific requirements of details and the creation of vibrant urban environment in the surroundings. For the low-resourced households, the municipalities choose to work primarily to make the projects fit into the environment rather than making demands on details.

Estimates of fuel management data for the equilibrium operation of a specific CANDU reactor have been obtained by simulating a period of the reactor's history using the Fuel Management Design Program (FMDP). The collapsing procedure in FMDP has been tested and improved. This procedure prepares a coarse mesh model of the reactor core from a detailed fine mesh calculation. The program calculates a set of coarse mesh parameters which, when used in the flux calculation, will regenerate exactly the same eigenvalue and flux distribution as the fine mesh model. These parameters can then be used with the coarse mesh, to calculate flux distributions for a series of perturbations from the reference calculation used in collapsing. Several coarse mesh models were generated and studied. It was found that coarse mesh calculations with collapsed parameters result in large savings in computing costs compared to the same calculations with fine mesh, but with very little loss in accuracy. / Thesis / Master of Engineering (ME)

This thesis project identifies an issue of limited interaction options with cell phones and considers it to be a design opening and opportunity, rather than a problem. The design opportunity presented in this work is for shaping of future cell phone interactions by allowing users to design their own cell phones. To explore this provocative yet complex design opportunity a programmatic design research approach is used. The design program in this thesis is referred to as the ‘Design-It-Together cell phone’, or the DIT cell phone, design program and can be described as a design research effort into how users working together to design and make their own cell phones could offer a new set of perspectives and possibilities in shaping future interaction options with cell phones in contrast to an industry lead cell phone design and development process. Furthermore, the motivation for this thesis is not problem-based but rather exploratory, where the intention is not to build an ideal phone but rather to explore the opportunities and challenges faced by the design program, and what that can mean for shaping the future of cell phone interactions. A comprehensive exploration of this design space was done in nine main explorations or nine main experiments. Each experiment was formulated to challenge a perspective of the design program. The results of the explorations generated a repertoire of examples relating to understanding the current situations and predictions for future possibilities for cell phone interactions. Interpretation of the design program was done by analyzing this repertoire of examples from the perspective of n nine specified dimensions of the design program. The dimensions acted as a guide in thinking about possible futures of cell phone interactions within the design space of the program. Interpretation of the design program in this way allowed for comprehensive scenarios to be created of what the future of cell phone interactions could be like, as well as gaps and bigger picture impacts of the design program. The overall results and contribution of this work adhered to what is expected from a programmatic design research approach and is stated here as knowledge generated from explorations and interpretation of the DIT cell phone design program, based on the generated repertoire of examples, which helps shape possible futures for cell phone interactions.