Browsing by Author "Guo, Ting"
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- Differences in income and consumer expenditure patterns between foreign and American graduate students at Virginia Polytechnic Institute and State UniversityGuo, Ting (Virginia Tech, 1991-01-05)The purpose of the study was to determine the differences in the total annual income, total annual and monthly expenditures, and consumer expenditure patterns between American and foreign graduate students at Virginia Polytechnic Institute and State University (VPI & SU). The study was based on a survey entitled "Virginia Polytechnic Institute and State University Graduate Students Demographic and Economic Impact Study" conducted in April, 1989. The sample size used in the analysis was 442, including 373 American and 69 foreign students. The findings from the study showed that (1) the American students had significantly higher total monthly expenditures than did the foreign students; (2) the American students had significantly higher absolute expenditures on tax, auto insurance, gasoline and auto repair, medical, laundry, and gifts and contributions, while the foreign students had significantly higher expenditures for telephone calls~ and (3) the American students had significantly larger percentage expenditure on tax, auto insurance, gasoline and auto repair, and entertainment, while the foreign students had significantly larger percentage expenditures on food, utilities, telephone, and travel.
- Separation of the common-mode and the differential-mode conducted electromagnetic interference noiseGuo, Ting (Virginia Tech, 1994-02-05)One of the difficulties in solving E:MI problems is the lack of diagnostic tools available. In this thesis work, a tool, called Noise Separator, is developed, which can be used to decipher the differential-mode (DM) noise and the common-mode (CM) noise from the total noise. A noise separator hardware is built and tested. The results show that at least 50 dB rejection to either DM or CM noise is achieved for frequency ranging from 10 KHz to 30 MHz. With the aid of the Noise Separator, EMI filter design is made easier.