Following nest emergence, sea turtle hatchling dispersal can be disrupted by artificial light or skyglow from urban areas. Mis- or disorientation increases exposure to predation, thermal stress, and dehydration, could consume valuable energy, and thus influence the likelihood of survival. This study utilized laboratory simulations of extended crawl distances and field observations to investigate the energy cost of disorientation crawling on loggerhead (Caretta caretta) and green (Chelonia mydas) sea turtle hatchlings and the impact on the subsequent swim frenzy. Extended crawls increased oxygen consumption, decreased plasma glucose, and reduced green hatchling swim performance following a 200m crawl. Surprisingly, plasma lactate concentrations did not increase with crawl distance, likely due to frequent rest periods that would, however, increase time on the beach and thus exposure to predators. This research may provide managers with physiological data to determine best practices for sea turtle conservation and adds to the biological knowledge of these animals. / Includes bibliography. / Thesis (M.S.)--Florida Atlantic University, 2016. / FAU Electronic Theses and Dissertations Collection

M. Tech. (Power Engineering, Faculty of Engineering and Technology), Vaal University of Technology / In view of the energy consumption problems, an impact study, extensive laboratory tests and an investigation towards comparable energy saving light sources was carried out on the light sources identified in the survey conducted at the Vaal University of Technology (VUT), Vanderbijlpark campus. Three types of identified incandescent light sources were purchased and extensively tested in order to obtain viable statistical data on the life span, luminance delivered per unit, power consumption and economic effect, as well as identifying relevant energy efficient light sources for replacement purposes. A suitable computerised maintenance program has been developed to be introduced to the VUT that currently does not have a lighting system maintenance program. The case study was located within the empirical-analytical paradigm, using quantitative data. The identified aims and goals place the empirical part of the study in the category of implementation evaluation research that provides an overview of a maintenance plan.

M.Tech. (Environmental Health) / Fluorescent lamps, because of their mercury content, are regarded as hazardous waste and fall under the category of electrical waste. This is due to mercury's toxicological, physical, and chemical or persistence properties, which may have acute or chronic detrimental impact on human health and the environment. This study adopted a quantitative research approach, which aimed at determining how fluorescent lamps are managed in selected public schools. The investigation followed an exploratory design.This research was done under the umbrella of the World Health Organisation Collaborating Centre for Urban Health's Health, Environment and Development study. The sample population included 22 public schools, and proportionate purposive sampling was used and data was collected through the use of structured questionnaires and observation checklist. There were no formal gUidelines available for the management of fluorescent lamps in schools as a result improper handling, storage or disposal thereof, poses a health risk to the learners, employees and the environment. The outcome of this study indicated the need of formal guidelines for the management of fluorescent lamps in public schools to the Department of Education, and to produce guidelines for operational procedures.