International Telemetering Conference Proceedings / October 22-25, 1984 / Riviera Hotel, Las Vegas, Nevada / The Digital Voice Network project is a 1984 IR&D program within the Microelectronic Systems Division of the Hughes Aircraft Company. The project is intended to advance the state-of-the-art in digital voice technology and demonstrate digital voice transmission using advanced microprocessor technology and token passing bus network architecture. This paper discusses the Digital Voice Network design architecture, voice terminal design and implementation, and finally future plans to satisfy digital voice requirements in a military environment.

International Telemetering Conference Proceedings / October 25-28, 1999 / Riviera Hotel and Convention Center, Las Vegas, Nevada / In order to reduce the ground segment equipment cost for small space missions, the French national space center (CNES) had the need to develop a CCSDS down-link interface board for low telemetry rates (< 1.5 Mb/s). This board performs frame synchronization and Reed-Solomon decoding. An important part of this design was the Reed-Solomon decoder development. In order to maintain low recurrent cost for this board, this decoder was realized in FPGA technology. Reed-Solomon decoding function, interleaving function (from 1 to 5) and virtual fill management are included in the same component. All set-up parameters are software programmable via the PCI bus, data and status are also available via the PCI bus under windows NT operating system. This paper presents the main features of this board and an overview of the Reed-Solomon decoder development.

published_or_final_version / Urban Planning / Master / Master of Science in Urban Planning

published_or_final_version / abstract / Transport Policy and Planning / Master / Master of Arts in Transport Policy and Planning

published_or_final_version / abstract / Transport Policy and Planning / Master / Master of Arts in Transport Policy and Planning

published_or_final_version / abstract / Transport Policy and Planning / Master / Master of Arts in Transport Policy and Planning

Quantifying the emissions due to the charging of the batteries of the plug-in hybrid electricity school bus operated by the Austin Independent School District (AISD) is the focus of this work. This plug-in hybrid school bus is one of only nineteen in the country, and was manufactured by IC Corporation. This hybrid school bus reduces fuel consumption and CO₂, NOx and PM emissions in comparison with conventional diesel buses. This reduction is good for the health of the children who take the school bus everyday as they are part of the population the most at risk because their lungs are still developing. In order to evaluate CO₂, NOx and PM emissions, measurements of the charging of the batteries versus time were taken for the two charging periods each day during the months of April and May 2009. These measurements were repeated in October 2009 when the route was changed for the new school year: 2009-2010. An analysis of the Austin electricity mix that provides electricity to the bus center was done hour by hour to evaluate the emissions, calculated on a g/mile basis. Measurements of the vehicle speed versus time and altitude were taken during February 2010 in order to explain some of the differences observed between the two routes. Different parameters were studied to analyze the results. The first parameter studied was the impact of the season on the emissions. The second parameter studied was the impact of the route and its characteristics (road length, traffic, grade, etc.). The last parameter studied was the difference between two methods used to evaluate the emissions using the electricity mix data. These two methods are different but each of them brings something to the analysis of the results. / text

BRT (Bus Rapid Transit) system is a newly developed urban transit mode. It was introduced into China market and achieved speedy development in the last decade. Until now, more than 20 cities have already established their own BRT system and put into operation. However, public transport operators in China cities do not give enough attention to the quality of service provided by the BRT system. As a consequence, lack of attraction is one of the major barriers for BRT system widely development. In this situation, this study established a framework for BRT service quality analysis and applied it in Hefei BRT Route 1. This framework integrates both objective and subjective scenario. In subjective scenario, a customer satisfaction survey is conducted for BRT passengers. In the survey, customers’ satisfaction levels towards different aspects of BRT service and their travel characteristics are collected. With the results of data analysis, objective measurement is followed. Objective measurement focuses on service performance measurement. Such measurement is based on criteria for public transit level of service. Combining the results of the customer satisfaction survey and site observation, a comprehensive assessment of a transit system’s quality of service can be conducted. By analyzing the BRT system’ service quality, improvement recommendations to current BRT system in terms of BRT running way, BRT station, BRT vehicle and BRT operation system are proposed. Additionally, for better BRT service evaluation, special criteria for level of BRT service are required in future research. / published_or_final_version / Transport Policy and Planning / Master / Master of Arts in Transport Policy and Planning

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