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931 results on '"Kao, T."'

160. A system for assessment in large classes : SOAS

Author

Mansinghka, Surendra K., Kao, T. F. Gina, Yip, C. L. Victor, Ha, Tak S., Chow, H. H. Charlotte, Tong, Dennis Pok Bun, Mansinghka, Surendra K., Kao, T. F. Gina, Yip, C. L. Victor, Ha, Tak S., Chow, H. H. Charlotte, and Tong, Dennis Pok Bun

Abstract

For many years, conducting examinations of a large class of several hundred students implied substantial resources in terms of time, venues and paper. The idea of developing a Secure Online Assessment System (SOAS) was to ease the administrative and instructional workload in terms of preparing, conducting and marking examination papers. This is a collaborative teaching development project contributed by members at the Center for Enhanced Learning and Teaching and the Department of Finance under the umbrella project of ‘Continuous Learning and Improvement through Teaching Innovation’ funded by the University Grants Committee. Two rounds of usability tests were conducted both receiving satisfactory and constructive comments on our work as well as feedback enabling us to make improvements to the system and the assessment procedure. A designated computer laboratory equipped with SOAS is deemed necessary for online assessment venue-booking purpose.

Published
2004

161. Evaluating of Filtration Performance of Electrospun Nano-fibrous Membrane.

Author

Wu, W. Y., Su, C. I., and Kao, T. H.

Subjects
NANOFIBERS, POLYACRYLONITRILES, MEMBRANE filters, ELECTROSPINNING, PERFORMANCE evaluation, QUALITY factor
Abstract

This study used Polyacrylonitrile (PAN) as the raw material to fabricate the nano-fibrous membrane applied in the high efficiency particulate air (HEPA) filter by using electrospinning technique. Firstly, the suitable electrospinning conditions of concentration, flow rate and collector rotation speed are examined to obtain the finer fiber diameter. Then, the pore size and filtration efficiency of the nano-fibrous membrane were investigated. This study used the Quality factor, Qf to be the indicator of measuring the filtration efficiency quality of the nano-fibrous membrane. It was found that the effect of the fiber arrangement on the pore size and filtration efficiency were of little significance. While, the fiber arrangement and basis weight of membrane has the more significant. When the collector rotation speed increases, parallel degree of fiber increases, thus decreasing the pore size and increasing filter efficiency. When the fiber membrane-based weight increases, the pore size decreases and the filter efficiency increases. The experiment results indicate that the nano-fibrous membrane with the performance of the smaller pore diameter 0.66pm gets the higher filtration efficiency 99.58%, and its quality factor (Qf) value up to 1.12. [ABSTRACT FROM AUTHOR]

Published
2017

171. 60 The Life of the Octogenarian Heart Transplant Patient

Author

Lockhart, D., primary, Piponniau, L., additional, Velleca, A., additional, Patel, J., additional, Kittleson, M., additional, Kearney, B., additional, Kao, T., additional, Johnson, M., additional, Kawano, M., additional, Goldstein, Z., additional, Rafiei, M., additional, and Kobashigawa, J., additional

Published
2011
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196. 444: Does High Risk Status Identified by Pre-Transplant Social Worker and Psychiatric Evaluation Predict Outcome after Heart Transplant?

Author

Moreno, E., primary, Valleca, A., additional, Patel, J., additional, Kawano, M., additional, Lockhart, D., additional, Montgomery, S., additional, Burch, C., additional, Rangel, L., additional, Kao, T., additional, Kiyosaki, K., additional, Wong, S., additional, Ankrom, A., additional, Ventura, L., additional, Kittleson, M., additional, Moriguch, J., additional, Shao, E., additional, Ardehali, A., additional, and Kobashigawa, J.A., additional

Published
2009
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198. Communications platform payload definition study, executive summary

Author

Clopp, H. W, Hawkes, T. A, Bertles, C. R, Pontano, B. A, and Kao, T

Subjects
Spacecraft Design, Testing And Performance
Abstract

Large geostationary communications platforms have been investigated in a number of studies since 1974 as a possible means to more effectively utilize the geostationary orbital arc and electromagnetic spectrum and to reduce overall satellite communications system costs. This NASA Lewis sponsored study addresses the commercial feasibility of various communications platform payload concepts circa 1998. It defines promising payload concepts, estimates recurring costs and identifies critical technologies needed to permit eventual commercialization. Ten communications service aggregation scenarios describing potential groupings of services were developed for a range of conditions. Payload concepts were defined for four of these scenarios: (1) Land Mobile Satellite Service (LMSS), meet 100% of CONUS plus Canada demand with a single platform; (2) Fixed Satellite Service (FSS) (Trunking + Customer Premises Service (CPS), meet 20% of CONUS demands; (3) FSS (Trunking + video distribution), 10 to 13% of CONUS demand; and (4) FSS (20% of demand) + Inter Satellite Links (ISL) + TDRSS/TDAS Data Distribution.

Published
1986

199. Communications platform payload definition study

Author

Clopp, H. W, Hawkes, T. A, Bertles, C. R, Pontano, B. A, and Kao, T

Subjects
Spacecraft Design, Testing And Performance
Abstract

Large geostationary communications platforms were investigated in a number of studies since 1974 as a possible means to more effectively utilize the geostationary arc and electromagnetic spectrum and to reduce overall satellite communications system costs. The commercial feasibility of various communications platform payload concepts circa 1998 was addressed. Promising payload concepts were defined, recurring costs were estimated, and critical technologies needed to enable eventual commercialization were identified. Ten communications service aggregation scenarios describing potential groupings of service were developed for a range of conditions. Payload concepts were defined for four of these scenarios: (1) Land Mobile Satellite Service (LMSS) meets 100% of Contiguous United States (CONUS) plus Canada demand with a single platform; (2) Fixed Satellite Service (FSS) (trunking + Customer Premises Service (CPS)), meet 20% of CONUS demand;(3) FSS (trunking + CPS + video distribution), 10 to 13% of CONUS demand; and (4) FSS (20% of demand) + Inter Satellite Links (ISL) + Tracking and Data Relay Satellite System (TDRSS)/Tracking and Data Acquisition System (TDAS) Data Distribution.

Published
1986

200. Growth of urea crystals by physical vapor transport

Author

Feigelson, R. S, Route, R. K, and Kao, T.-M

Subjects
Solid-State Physics
Abstract

This work demonstrates that high optical quality crystals of urea can be grown by the physical vapor transport method. The unique features of this method are compared with growth from methanol/water solutions. High growth rates, exceeding 2.5 mm/day, were achieved, and cm-size optical quality single crystals were obtained. Details of the growth technique and the physical properties of the crystals are presented.

Published
1985
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