Thesis(M.S.)--Case Western Reserve University, 2009 / Title from PDF (viewed on 2010-01-28) Department of Chemical Engineering Includes abstract Includes bibliographical references and appendices Available online via the OhioLINK ETD Center

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The purpose of the study was to determine the adherence to and usage of the N95 respirator mask as a TB control measure in healthcare facilities in the Tshwane district during managing a patient suspected or confirmed with pulmonary TB infection. A cross-sectional, descriptive survey design was used to collect the data. A sample of 204 healthcare professionals and healthcare workers working in five healthcare facilities in the Tshwane health district met the inclusion criteria for this study. More than 83.33 %( n=170) of the staff were nurses; physiotherapists in the healthcare facility constituted the lowest percentage (1.96%; n=4). Chi-square test was done to test whether there was a significant difference between knowledge on the fit test of the N95 respirator mask and the healthcare professionals and healthcare workers. There was no significant difference in knowledge across the five staff categories P-value of >0.05. Ensuring successful protection of the healthcare workers from contracting M-TB in the TB healthcare facilities depends on effective implementation of a respiratory protection programme and the correct usage of the N95 respirator mask.

Thesis (Ph.D.)--University of Delaware, 2006. / Principal faculty advisor: Anette M. Karlsson, Dept. of Mechanical Engineering. Includes bibliographical references.

Protective device estimation is a challenging task because there are numerous protective devices present in a typical distribution system. Among various protective devices, auto-reclosers and fuses are the main overcurrent protection on distribution systems. Operation of a protective device in response to a particular fault condition depends upon the protective device’s operating behavior and coordination of various such protective devices. This thesis presents the design and implementation of a protective device estimation algorithm which helps in identifying which protective devices have operated to clear a short circuit condition. The algorithm uses manufacturer’s device details, power quality data measured from substation monitoring devices and power system event features estimated using existing DFA algorithms. The proposed technique can be used to evaluate coordination of these protective devices and helps in locating a fault in a distribution system feeder. This approach is independent of feeder topology and could be readily used for any distribution system. The effectiveness of this algorithm is verified by simulated and actual test data. Suggestions are included for future research and application by electric utilities.