Racing drivers always want to traverse path at vehicle’s maximum performance limits while keeping the vehicle at its ideal trajectory. The main objective of this report is to elaborate strategy for the path following problem in which driver has to follow the predefined 2D roads. New steering controller design for closed loop racing driver model in Dymola vehicle dynamics library is developed. The methodology proposed by Sharp et al. [2] is followed with the optimal velocity profile that tries to mimic the actions of the real drivers in real time scenarios. Vehicle handling limits i.e. longitudinal and lateral limits are defined before simulation. While travelling in the neighbourhood of optimal velocity on the straight road as well as during the curves, the performance of the steering controller is tested by conducting the test on J turn, Clothoid, Extended chicane and the closing curve path and also tested during the different environment effects e.g. when there is a side wind affecting the vehicle. Performance of existing and new steering controllers discussed and compared in result chapter. It is ensured that the drawbacks in the existing steering controller are eliminated by using the proposed methodology in new implemented steering controller. Key Words: Driver Model, Steering Controller, Path following, Velocity profile

<p>Abstract：The kernel system of Windows is more thoroughly exposed to people. So, thekernel-level Rootkits techniques are now laid on greater emphasis. It is very importantto maintain the security of computers and to conduct an in-depth research on theoperational mechanism by using kernel-level Rootkits in hiding its traces. Since theinvolved core techniques are beginning to catch on nowadays, we should analyzesome new key techniques employed for application of Rootkits, discuss the specificmethods and propose a set of defense strategy for computer security.</p>

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Master of Science / Department of Civil Engineering / Sunanda Dissanayake / The percentage of the U.S. population aged 65 years or older is increasing rapidly. Statistics also show this age group was 14.9 percent of the population in 2015 and is expected to be 20.7 to 21.4 percent for the years 2030–2050. Kansas has similar statewide trends with its aging population. Therefore, identifying issues, concerns, and factors associated with severity of older-driver crashes in Kansas is necessary. The Kansas Crash Analysis and Reporting System (KCARS) database maintained by Kansas Department of Transportation was used in this study to identify older-driver crash characteristics, compare older drivers with all drivers, and develop crash severity models. According to KCARS data, older drivers were involved in more than one in five fatal injuries out of all drivers in Kansas from 2010 to 2014. When compared with all drivers, older drivers were overly represented in fatal and incapacitating injuries. The percentage of older-driver fatal injuries was more than the twice that of all drivers. When compared with all drivers, older drivers were involved more often in crashes at four-way intersections, on straight and level roads, in daylight hours, and at a stop or yield signs. An in-depth crash severity analysis was carried out for the older drivers involved in crashes. Three separate binary logistic regression models were developed for single-vehicle crashes where only the older driver was present (Model A), single-vehicle crashes involving an older driver with at least one passenger (Model B), and multi-vehicle crashes involving at least one older driver (Model C). From the crash severity analysis, it was found that left turns were significant in changing the crash severity for Model A, but it was not significant in model B, meaning that older drivers may be safer with passengers. For Model B, none of the passenger attributes were significant, though it was originally developed to identify passenger attributes. Gender of the older driver was not significant in any model. For all models, variables such as safety equipment use, crash location, weather conditions, driver ejected or trapped, and light conditions distinguished crash severity. Furthermore, for Model A, variables such as day of the week, speed, accident class, and maneuver, distinguished crash severity. Moreover, accident class, surface type, and vehicle type changed crash severity in Model B. Number of vehicles, speed, collision type, maneuver, and two-lane roads were significant in Model C. A road-user survey was also conducted to identify habits, needs, and concerns of Kansas' aging road users since it was not advisable to conclude safety factors solely on crash data. The probability of occurrence was calculated by taking the weighted average of answers to a question. Then a contingency table analysis was carried out to identify relationships among variables. For older drivers, seatbelt use as a driver had the highest probability of occurrence. Driving in heavy traffic, merging into traffic, moving away from traffic, and judging gaps were dependent on age group. Findings of this research gave an understanding of older-driver crashes and associated factors. Since more than 85 percent of crash contributory causes were related to drivers, driver awareness programs, driver licensing restrictions, providing public transportation, and law enforcement can be used as countermeasures. Accordingly, results of this study can be used to enhance older-driver safety and awareness programs.

Orientador: Abílio Garcia dos Santos Filho / Banca: João Candido Fernandes / Banca: Alberto de Vitta / Resumo: O presente estudo teve como objetivo detectar os desconfortos e insatisfações dos motoristas de ônibus urbano, com a poltrona que trabalham. Para melhor realização do estudo, a presente pesquisa objetivou também conhecer informações pessoais dos motoristas, problemas de saúde que possam estar relacionados à profissão e à poltrona, e também questões diretamente ligadas à poltrona e ao posto de trabalho. Durante a revisão de literatura o presente trabalho fez um breve histórico do transporte coletivo na cidade de São Paulo e um comparativo de poltronas com países de primeiro mundo. Fez também uma análise das situações, comportamentos e o que ocorre com o corpo humano na posição sentada e também alguns apanhados de normas relacionadas à poltrona. Como pesquisa, o presente trabalho realizou um estudo de caso em 07 empresas na cidade de São Paulo, onde contou com uma pesquisa descritiva, sendo entrevistados 147 motoristas, totalizando uma média de 21 pesquisados por empresa. O estudo do caso permitiu conhecer as opiniões dos motoristas com relação à poltrona que trabalham. As empresas entrevistadas tinham perfis semelhantes, porém, com as mais diversificadas linhas de itinerário, variando desde a periferia, com ruas de pavimentações boas e ruins, ou em outros casos, linhas direcionadas para o centro da cidade com congestionamentos e problemas de superlotação nos ônibus e tinham como principal segmento de trabalho o ônibus urbano. Como principais resultados da pesquisa, pode-se ressaltar que 85,14% dos entrevistados apresentaram uma ou mais sugestões de melhoria para a poltrona; 56,76% disseram haver alguma dor que acreditavam ser por trabalharem sentados; 77,70% afirmaram que a poltrona faz transpirar muito, 52,03% reclamaram que o ato de sentar e levantar da poltrona é desconfortável. Por fim, concluiu-se que... (Resumo completo, clicar acesso eletrônico abaixo) / Abstract: This paper aimed to reveal the discomfort and dissatisfactions or urban public transport drivers referring to their seats. The paper aimed as well knowing personal information about the bus drivers, health problems that might be related to the occupation and the seat, and also inquiries straightly related to the seat and the job station. During the literal revisal, this paper took effect a brief report of the public transport in São Paulo and a comparative degree of the seats in world power countries. It was also reported an analysis of the situations, behaviors and what happens to the human body in the sat position as well as some pattern résumés related to the seat. As the concept of research, this paper developed an examination in seven companies of São Paulo in which figured on a descriptive research whereas 147 bus drivers were interviewed coming down to an average of 21 researched per company. This examination allowed the acquirement of the bus drivers' opinions related to the seat they work in. The interviewed companies had similar profiles, however they had the most diversified itinerary lines, alternating from the suburbs enclosing paving streets in good and bad condition to lines routed to the town center enclosing traffic jam and overcrowding and had as main job section the public transport. As the main results on the research, it followed that 85.14% of the interviewed presented one or more improvement suggestions referred to the seats; 56.76% complained about pain by means of working sat down; 77.70% affirmed that the seat makes them sweat too much; 52,03% complained that the sitting down and standing up action is uncomfortable. At last, it followed that the dissatisfaction... (Complete abstract click electronic access below) / Mestre

HelenOS is an experimental operating system based on microkernel. It's developed by people related to Faculty of Mathematics and Physics at Charles University in Prague. The present implementantion is prepared to support a scale of filesystems because of VFS abstraction, but actually only a few of filesystems are supported. Ext4 is modern filesystem, developed Linux kernel developers. The previous releases ext2 and especially ext3 are still very popular in many Linux distributions. Imple- mentation of ext2/3/4 filesystems can be also found in other unix-based operating systems, for example *BSD or OpenSolaris. The main goal of this thesis is to extend HelenOS operating system to support previously mentioned filesystems.

Abstract：The kernel system of Windows is more thoroughly exposed to people. So, thekernel-level Rootkits techniques are now laid on greater emphasis. It is very importantto maintain the security of computers and to conduct an in-depth research on theoperational mechanism by using kernel-level Rootkits in hiding its traces. Since theinvolved core techniques are beginning to catch on nowadays, we should analyzesome new key techniques employed for application of Rootkits, discuss the specificmethods and propose a set of defense strategy for computer security.

The primary purpose of this study was to determine the effectiveness of the Oregon Level I Diversion Program in changing knowledge and attitude concerning driving after drinking. A secondary purpose was to determine the effect of the eight different class-time schedules used to teach the required 12-hour curriculum on the clients' test scores. An additional purpose was to determine if a significant correlation existed between gain in knowledge scores and selected instructional variables. The 61 Item Drinking and Driving Inventory was administered to all 965 individuals in the sample. Pretest and posttest scores were analyzed using a Paired T and Analysis of Covariance. Data from questionnaires administered to teachers in the Oregon Diversion Program were correlated with students' gains in knowledge scores. The Pearson r and Spearman rho were used in the correlation analyses. Results of the statistical analyses at the .05 level of significance were: 1. There was a significant difference in pretest and posttest scores for all four dependent variables (knowledge score, two attitude scores and the behavioral intention score). 2. There was a significant difference in the adjusted means among the eight time spans for three of the dependent variables (knowledge score, one attitude score and the behavioral intention score). 3. The instructional variable identified as Cultural Differences on the questionnaire correlated significantly with students' gains in knowledge scores. An additional finding was gathered from the Oregon Department of Motor Vehicles' statistics. There was a lower re-arrest rate for the clients who completed the Level I Diversion Program than for the persons who chose to be processed through the court system. Selected recommendations included: 1. A long range study of recidivism to include correlation of personal and demographic variables of clients should be conducted. 2. A demographic analysis of program instructors, including their educational background correlated with performance, should be undertaken. / Graduation date: 1984