Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 50 for “"Jams"”.
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A Model of Project Continuation in Game Jams and Hackathons
Game jams and hackathons are events where individuals design and build new technology prototypes in a short timeframe. Prototypes made at hackathons are often abandoned after the event and are never finished or used by their intended audiences. Though continued work on prototypes is not the only …
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Modeling of surges caused by the release of breakup ice jams
… mechanisms related to the break-up of ice jams were identified. It was evident that the surge characteristics depend primarily on the type of release mechanism and the prevailing initial hydrodynamic conditions prevailing immediately before release. Observations showed that during the …
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Impacts of vehicle automation on traffic flow stability
… of emergent phenomena such as phantom traffic jams, or traffic stability. This dissertation has four main contributions: (i) experimental evidence to validate that human driving behavior alone is sufficient for the development of phantom jams, (ii) theoretical work as well as experimental work …
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Vergleichende Betrachtung der Sicherheit und Wirtschaftlichkeit von Arbeitsstellen kürzerer Dauer auf Autobahnen bei Tag und Nacht
… costs. About 1/3 of lost time due to traffic jams on German motorways is a result of roadworks. A reduction of these costs would be possible by above all optimising the annually about 70.000 short-term roadworks (STR) which cause traffic jams. In particular shifting these roadworks from day to …
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Force control of heavy lift manipulators for high precision insertion tasks
… be difficult for the operator feel when these jams will occur and there will be no information about how to prevent them. This thesis analyzes the geometry and mechanics of the jamming problem and derives a control system to assist the user in preventing these jams. These methods can be …
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Influence of changing patterns of sucrose consumption on industrial users. Response by manufacturers of soft drinks, biscuits, cereals, cakes confectionery, ice-cream, jams, canned products and other sugar-containing foods to the U. K. dietary guidelines that relate to sucrose consumption.
Sugar is intrinsically linked with the modern food system. Large sections of the U. K. food industry are dependent on its use and functional qualities. Supplies of sucrose entering the food chain have declined 25% between the 1950's and 1980's and currently stand around 37 kg/person/year. …
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Channel characteristics and large organic debris in adjacent burned and unburned watersheds a decade after wildfire, Park County, Wyoming
… in drainage area and number of debris jams. Drainage area was the most important factor for explaining mean riffle width. The direction and magnitude of channel-width differences are consistent with the increased duration of near-bankfull discharge in the burned stream and the likely …
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Phantom jam Sybil attack in connected vehicular networks
… to create ghost vehicles, inducing fake traffic jams and disturbance to other vehicles which may lead to accidents. In this work, we have developed the first sophisticated sybil attack, in which an attacker uses legitimate pseudonyms to create multiple ghost vehicles. These ghost vehicles …
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Traffic delay prediction from historical observations
… fuel and the environment by avoiding traffic jams. Before one can predict the best route for a user to take, one must first be able to accurately predict future travel times. In this thesis, we develop a classification-based technique to extract information from historical traffic data to help …
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Time-to-contact statistics as a proxy for accident probabilities
… ratio is needed to prevent phantom traffic jams. The results in this paper show that there is a benefit to mixing bilateral control cars into general traffic, even at relatively low mixture ratios. Simulations were also performed to see how acceleration and jerk vary with the mixture of …
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A Sociotechnical Network Analysis of Bluegrass Practitioners and Instruments: Competing Definitions, Motivating Authenticities, and Tradition-Respecting Innovations
… how bluegrass practices, such as festivals and jams, temporarily restructure the network, creating and maintaining connections among actors. Further, the study shows how authenticity, conceptualized either as personal expression or as adherence to tradition, motivates actors toward these …
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Morphodynamics and driftwood dispersal in braided rivers
… close to the input point in sparse, small jams. Physical modelling highlighted a complex relationships between flow stage and the longitudinal and vertical distribution of wood; high discharge increases the ability of the system to transfer wood, but at the same time generates complex …
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Computer simulation applied to parcel conveyors
… Non-conforming parcels could cause jams, particularly with humid atmospheric conditions. It was established that the continuum theory of Jenike, which assumes the conveyor to be filled with an 'Ideal' material, could not be extended to parcel conveyors. This precludes the use of …
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Wildlife Habitat in the James River Valley, South Dakota
… number valuable dead trees that often formed jams in the river, and a general condition of excessive grazing on the area. The dynamic condition of the river channel on the study area appeared to enhance the value of the floodplain to wildlife although overgrazing and flooding were preventing …
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The walled city : Beijing hybrid development plan in the 2nd ring road
… for the city; it is notorious for its traffic jams, pollution, and drastically degenerated urban environment-a "wall" that cuts off two sides of the city and its associated urbanity. The thesis explores the potential of new intervention on the site of the second ring road, adopting and …
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An Urban Soccer Stadium for Washington D.C.
… parking lots, miles of asphalt, and traffic jams: this is what the modern sport stadia has come to represent. Does it have to be this way? What does the future of sports stadia hold? Can we build a stadium that is better integrated to the community around it? The stadium must become a major …
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Traffic models from a velocity point of view and implementation of traffic conditions in excess fuel consumption estimates
… that taking into account the presence of traffic jams instead of assuming all vehicles traveling at maximum velocity, as is done to obtain usual estimates, increases the deflection-induced dissipation per vehicle per traveled length and reduces the roughness-induced one. This difference is, …
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A hybrid discrete element and continuum method for multiscale granular media modeling
… flow, flow with a sufficiently small orifice jams, resolving length scale dependent effects. Collapse of granular columns modeled with the hybrid method compare quantitatively well with pure discrete simulation and experiments in literature. A significant speedup is seen with the hybrid method …
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Theater of jambands: Performance of resistance
… to describe bands that perform long, improvised jams during their live shows. As these improvised shows have increased in popularity, they have become great spectacles, featuring light shows, filmed images, dancing, storytelling, and short plays. While the performance happening inside the arena …
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