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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
41

Investigation of 50 km/h speed zone :

Nalluri, Gopi Krishna Unknown Date (has links)
To date, the 50 km/h General Urban Speed Limit (GUSL) has been implemented to some local residential streets in the City of Port Adelaide Enfield (hereafter referred to as Port Adelaide), South Australia as a Local Area Traffic Management (LATM) scheme since March 2003 aiming to reduce travel speeds and traffic volumes so as to enhance road safety and amenity of residential areas. Port Adelaide is located approximately nine kilometres away from the North-west of Adelaide Central Business District (CBD). There are major express highways and freight roads enclosing Port Adelaide, and within the boundaries is composed of many arterial and collector roads. All of these arterial roads and some major collector roads line in north-south direction. As a result of these geographical characteristics, Port Adelaide is a city covering the major direct routes for residents and major freight route for goods transport in the north-west suburbs. / However, one of the problems occurring in Port Adelaide seems to be characteristics of grid road networks lacking clear road hierarchy, which can be seen from many local streets connecting directly with nearby arterial and/or collector roads. Furthermore, as described previously Port Adelaide consists of many freight routes, arterial routes, and these characteristics cause another problem. Traffic is induced to divert to local streets, which are relatively straight, and uses them as an alternative route causing many problems to residents in the local area due to travel demands during rush hour. To this point, it can be seen that the 50 km/h GUSL scheme might not be as efficient as it should be in deterring through traffic since the implementation of traffic management has not covered a macro scale, which in this case is arterial roads forming a connective grid. / This study seeks to present the analysis of traffic data in terms of traffic volumes, mean speed and 85th percentile on three different local residential streets during weekday and soma crash data analysis is also done on two study streets. The expected results of this study may be taken as samples for further research in future. / Thesis (MTransportSysEngineering)--University of South Australia, 2006.
42

The Exercise Physiology of the Racing Greyhound

Ross Staaden January 1984 (has links)
Greyhounds were trained to gallop at maximal running speed on a treadmill constructed for the purpose. This speed considerably exceeded maximal aerobic speed and was termed supramaximal. A mask was used to collect expired gases into bags during runs of 7.5 to 60 seconds and over the first 8-10 minutes of the recovery period. Respiratory parameters measured included VE, V02' VC02', R, fR', VT' ventilatory equivalent of °2 uptake and ventilatory equivalent of CO2 production. Respiration was found to be synchronised with the gallop stride, enabling both a high fR and VT. Mean VE reached 6 1.kg-1.min-1. Mean V02 reached 143ml.kg-l.min-l during the 30-45 second segment of running. Lactic acid draining into the blood stream displaced CO2 from the bicarbonate buffer system, so that R rose above 1.0. The highest value of R, 2.3 occurred in the second minute of recovery. The alactacid debt of the greyhound was found to be higher than that of man but was repaid much more rapidly because of the greyhound's superior oxygen transport system. The cardiovascular system was studied using electromagnetic and thermodilution flowmeters, and a heart rate telemeter. Changes in blood pressure caused changes in the relationship of the very elastic aortic root and the electromagnetic transducer cuff so that accurate calibration was not possible. Reliable values of cardiac output were obtained by thermodilution. Parameters measured included HR, cardiac output, SV and PCV taken before, during and for 1 hour after running. The minimum HR whilst sleeping was also obtained, and averaged 42 b min .-1 The HR was highest during runs of 30 seconds, 318 plus/minus18 b min -1. After running it fell sharply to below 160 in the second minute of recovery then rose to 200b.min-l 10 minutes after 30 and 45 second runs. HR was close to resting levels 1 hour after running. PCV after 30 seconds of running was 63.5 + 2.1% and had returned to resting values by 1 hour. Cardiac output during high speed runs was 914 + 209ml.kg-l.min-l while SV at 2.9 + 0.6ml. kg-l was increased 32% above resting SV. Acid-base balance of jugular venous blood was studied. Comparisons with arterial samples taken at the same time showed a useful relationship of arterial and jugular venous blood for lactate, base excess and pH. The time taken for blood lactate to reach its peak value varied with the intensity and the duration of the run. The jugular venous blood lactate level after 45 of running peaked at 181 plus or minus l5mg.dl-l (7 minutes after seconds running) , pH fell to 7.094 plus or minus 0.27, base excess to -23.4 plus or minus 2.7 mEq.l-l and PC02 to 23 + 2 mm Hg. All values had returned to resting level 1 hour after the run. Oxygen consumption during running, alactacid debt, lactate production and distance covered were used to calculate total energy cost and relative contributions of energy sources and energy cost.m -1. Anaerobic sources were the main contributors in the first 15 seconds but in the 15-30 second segment aerobic sources supplied 53% of the energy required and in the 30-45 second segment, 79%. The energy source contributions to30 seconds of running were aerobic 30%, alactacid debt 19% and lactic acid 51%. The energy cost.m-l at supramaximal speeds was higher than predicted by formulae derived from studies of dogs at submaximal speeds. The first 7.5 seconds of running cost almost as much as the next 22.5 seconds, indicating a high cost of acceleration. This is the first quantification of the energy cost of acceleration reported. Compared to man, the greyhound has a very high oxygen uptake during sprinting. Man's major deficiencies as a sprinter are a low maximal heart rate, small heart relative to body size and low PCV. Sprinting impedes respiration in man but aids it in the greyhound. Calculations indicate that when man runs at supramaximal speed, it costs more per metre than predicted by formulae derived at submaximal speeds and that the energy cost of acceleration is of the same order as in the greyhound although man attains a much lower peak speed.
43

Temporality and difference from the Agora to the airport : towards a theory of power-chronography /

Sharma, Sarah Rani. January 2006 (has links)
Thesis (Ph.D.)--York University, 2006. Graduate Programme in Communication and Culture. / Typescript. Includes bibliographical references (leaves 228-243). Also available on the Internet. MODE OF ACCESS via web browser by entering the following URL: http://gateway.proquest.com/openurl?url_ver=Z39.88-2004&res_dat=xri:pqdiss&rft_val_fmt=info:ofi/fmt:kev:mtx:dissertation&rft_dat=xri:pqdiss:NR19762
44

An experimental study of the relationship between velocity and pressure fluctuations in a wing-body junction /

Rife, Michael C., January 1992 (has links)
Thesis (M.S.)--Virginia Polytechnic Institute and State University, 1992. / Vita. Abstract. Includes bibliographical references (leaves 63-65). Also available via the Internet.
45

Automated detection of a crossing contact based on its Doppler shift

How, Whye Keong. January 2009 (has links) (PDF)
Thesis (M.S. in Engineering Acoustics)--Naval Postgraduate School, March 2009. / Thesis Advisor(s): Kapolka, Daphne ; Rice, Joseph. "March 2009." Description based on title screen as viewed on April 23, 2009. Author(s) subject terms: Automated passive contact detection, Doppler shift, cross correlation, matched filter, velocity estimation, CPA range estimation Includes bibliographical references (p. 99). Also available in print.
46

Longitudinal axis display requirements for high speed cruise /

Honaker, David, January 1993 (has links)
Thesis (M.S.)--Virginia Polytechnic Institute and State University, 1993. / Vita. Abstract. Includes bibliographical references (leaves 57-59). Also available via the Internet.
47

Measurements of ocean currents across the continental margin off Pt. Sur, California, in January 1990

Buckley, Keith Allen. January 1990 (has links)
Thesis (M.S. in Meteorology and Physical Oceanography)--Naval Postgraduate School, December 1990. / Thesis Advisor(s): Collins, C. A. Second Reader: Garfield, Newell. "December 1990." Description based on title screen as viewed on April 01, 2010. DTIC Descriptor(s): Velocity, density, ocean currents, water, edges, acoustic waves, inshore areas, surfaces, profiles, California, acoustic equipment, geophysics, hydrographic surveying, doppler effect, east(direction), dropsondes, anomalies DTIC Identifier(s): Ocean currents, *ocean circulation, *oceanographic data, hydrographic surveying, water flow, mass flow, geostrophic currents, AVHRR(advanced very high resolution radiometers), theses, coastal regions, Davidson inshore current, high resolution, radiometers, meteorological satellites, pacific ocean, acoustic measurements, seasonal variations. Author(s) subject terms: Davidson inshore current, California current, California undercurrent, Pt. Sur transection Includes bibliographical references (p. 74-77). Also available in print.
48

Three-dimensional velocity extraction using laser Doppler vibrometry /

Abel, Jeffry J., January 1993 (has links)
Thesis (M.S.)--Virginia Polytechnic Institute and State University, 1993. / Vita. Abstract. Includes bibliographical references (leaf 98). Also available via the Internet.
49

Determinants of maximum walking speed among Chinese community dwelling older adults /

Tam, Ching-man. January 2006 (has links)
Thesis (M. Med. Sc.)--University of Hong Kong, 200.
50

Active suspensions for flexible-bodied rail vehicles

Foo, Tuan-Hoe (Edwin) January 2000 (has links)
This work investigated the design of classical and optimal control strategies to actively control the flexible modes of a high speed railway vehicle body. It explored the novel idea of adding a third actuator at the centre of the vehicle body to suppress the flexible body modes (i.e. first symmetrical and first asymmetrical) in addition to the actuators located across the front and rear secondary suspensions. The aim is to minimise the level of vibration and improve the ride quality (comfort). Both the two and three actuators are considered in the classical and optimal control strategies investigated.

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