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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.
61

Cancer mortality among workers of a synthetic textiles plant in Quebec

Goldberg, Mark S., 1952- January 1991 (has links)
No description available.
62

Long-term integrated sampling to characterize airborne volatile organic compounds in indoor and outdoor environments

Simon, Philippe, 1964- January 1997 (has links)
No description available.
63

Exposition professionnelle aux poussières respirables et au quartz respirable dans les mines métalliques du Nord-Ouest québecois

Gagné, Lise. January 2000 (has links)
No description available.
64

Measurement of ventilation efficiency for indoor air quality in office buildings using carbon dioxide as a tracer gas

Auger, Martin. January 1996 (has links)
No description available.
65

The relationship between high school athletic administrators' job satisfaction and job related stress

Unknown Date (has links)
The primary purpose of this investigation was to determine the relationship between high school athletic administrators' job satisfaction and job-related stress. In addition, differences in the levels of administrators' job satisfaction and job-related stress according to gender, years of experience, and school size were examined. / Data were obtained from 371 high school athletic administrators employed in public schools from North Florida and South Georgia. Specifically, the subjects were head coaches who coached sports such as football, basketball, volleyball, softball, and baseball. / Three instruments were used in the investigation. They included a Personal Data Sheet, the Job Satisfaction Scale, and the Job-Related Stress Scale. The Pearson-Product Moment Correlation was used to test hypothesis one and a one-way Analysis of Variance was used to test hypotheses two through seven. The.05 alpha level was used as the criterion for the rejection of the hypotheses. / The following conclusions were made: (a) There is a positive correlation between satisfaction and job-related stress; (b) Gender appears to have an affect on job stress; (c) Gender does not appear to be a factor in the perception of job satisfaction; (d) Years of experience appears to have an affect on job satisfaction and job stress; and (e) School size appears to have an affect on job satisfaction and job stress. / The following recommendations were made: (a) Similar studies should be conducted using a national sample of head coaches and athletic administrators to examine the relationship between job satisfaction and job stress; (b) Future research should identify specific coping mechanisms used by head coaches to control and decrease the negative aspects of job stress. Also, measures should be taken to determine whether female head coaches use different stress-reducing mechanisms than male head coaches; (c) Future research should compare head coaches from larger schools to coaches from smaller schools to determine whether perceptions related to effectiveness and job satisfaction are different; (d) Future research should include interviews with former administrators and coaches to determine reasons why they quit coaching; and (e) Future research should include an analysis of the various sports to determine which sports activity may create the greatest potential for stress. / Source: Dissertation Abstracts International, Volume: 53-11, Section: A, page: 3841. / Major Professor: Dewayne J. Johnson. / Thesis (Ph.D.)--The Florida State University, 1992.
66

An applied model of the physiological response to cold

Unknown Date (has links)
Humans are exposed daily to the deleterious effects of acute environmental stressors. Experimental research can provide solutions to the problems of protecting human life in adverse environments. However, it is not always possible or practical to employ human subjects when exploring acute or extreme conditions. Consequently, an applied nonhuman model may provide the best substitute for human subjects to assess the environmental impact. The model must be able to be evaluated and respond validly and reliably to the stressor. / In this study, a primate model was assessed during cold stress that conceivably may be encountered by civilian or military workers. Specifically, two of the hormones responsible for fluid shifts in the body during acute cold exposure and their relationships to urine output and body temperatures were studied in five male adult rhesus monkeys (Macaca mulatta). Plasma concentrations of vasopressin and norepinephrine were measured before, during (every 30 minutes), and after 2 hours at 6 and 26$\sp\circ$C. Urine volume and sodium and potassium concentrations were also determined. The monkeys did not exhibit diuresis or natriuresis during the exposure. Plasma vasopressin and norepinephrine increased significantly (p $<$ 0.05) during cold exposure. These data suggest that both vasopressin and norepinephrine are important in the body fluid response of the rhesus monkey during acute cold stress. It appeared that vasopressin may be the dominant hormone because of the antidiuretic effect observed. Norepinephrine did not induce a diuretic effect. This response is contradictory to previous works with other animals and humans. Despite these results, the rhesus monkey appeared to be suitable for examining the effects of cold at rest under controlled environmental conditions. However, data from cold research with this primate model may not extrapolate to humans or other animals. / Source: Dissertation Abstracts International, Volume: 57-03, Section: B, page: 1549. / Major Professor: Emily Haymes. / Thesis (Ph.D.)--The Florida State University, 1996.
67

Barriers to occupational noise management

Williams, Warwick Hamilton, Safety Science, Faculty of Science, UNSW January 2007 (has links)
This work undertook the examination of the perceived barriers that exist to the management of occupational noise exposure in the workplace. Exposure to excessive levels of noise results in cumulative damage to the hearing mechanism of the ear and a subsequent hearing loss. This hearing loss is permanent and does not recover over time. Initially the conventional method of addressing or controlling noise exposure was through Hearing Conservation Programs and more recently through Occupational Noise Management Programs that take more of a risk management approach. However, the numbers of new hearing loss claims submitted through the various ???workcover??? and ???worksafe??? authorities in Australia continue to remain very high. Hearing loss claims rank within the top two in number of new claims each year. The research conducted shows that there are four main barriers perceived by individuals that work against the institution of effective preventive action. These four main barriers in order of priority are hearing protectors, information, culture and management, and are themselves each composed of several lesser factors. Each of the barriers was examined more closely in an attempt to better understand how they operate and the potential to discover how they may be overcome. To briefly summarise the main barriers: 1) Hearing protectors are uncomfortable, impede communication and are unpleasant to wear; 2) Individuals would like more information on noise reduction and for this information to be supplied by management; 3) workplace and management culture needs to be supportive of occupational health and safety in general and with the implementation of supportive preventive measures in particular; and 3) management needs to be seen to place importance on occupational health and safety in the workplace in general and the reduction of excessive noise in particular. By being aware of the barriers and operation the design of future more effective intervention or better noise management programs should be possible.
68

Cardiovascular risk factors in career firefighters.

Drew-Nord, Dana C. January 2009 (has links)
Thesis (Ph.D.)--University of California, San Francisco, 2009. / Source: Dissertation Abstracts International, Volume: 70-06, Section: B, page: 3427. Adviser: OiSaeng Hong.
69

Investigation of the effects of various cure parameters on the release of 4-phenylcyclohexene from carpet backed with styrene-butadiene rubber latex

Leforce, Mary Hall, 1949- January 1991 (has links)
The effects of cure time, cure temperature, and air circulation on the release of 4-phenylcyclohexene (4-PCH) in tufted carpet backed with carboxylated styrene-butadiene rubber (SBR) latex were examined in this research project. 4-PCH is a suspect cause of certain "building-related" illnesses such as headache, upper respiratory and eye irritation, and fatigue. A standardized method for preparing carpet backed with SBR latex and analyzing its 4-PCH content was developed. The cure parameters investigated included three cure temperatures (225, 250 and 275°F), six cure times (0, 5, 10, 20, 40 and 60 minutes), and three air circulation rates (zero, three air exchanges per minute, and ten air exchanges per minute with 1500 linear feet per minute airflow). Increased airflow (1500 linear feet per minute) over the carpet surface produced the greatest impact on 4-PCH release from carpet. Increasing the cure temperature and cure time also significantly increased the release of 4-PCH.
70

Occupational exposure to azinphos-methyl: Correlating biological markers to environmental residue levels

Gonzales, Melissa, 1963- January 1992 (has links)
Peach harvester exposure to azinphos-methyl (AZM) residues estimated by the Transfer Factor (TF) ratio of Dislodgeable Foliar Residue (DFR) to Daily Dermal Exposure (DDE) was compared to estimates based on the relationship between dermal exposure and dialkylphosphate metabolite excretion. DFR was monitored in four orchards from the time of pesticide application through harvest. Eleven male harvesters wore cotton tee-shirt dosimeters and provided area-specific skin washes and wipes for DDE monitoring during work operations. Urinary dialkylphosphate metabolites of AZM were also monitored and compared to DDE results. During a later harvest for which DDE was not determined, the dermal exposure estimated by the TF (1,310 μg) was comparable to the estimates based on dialkylphosphate excretion (1,456-1,534 μg). A repeated measures ANOVA showed that harvesters' cholinesterase levels were significantly lower than 'non-harvesters'. No significant reductions in cholinesterase levels were detected over time.

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