MPH / Department of Public Health / Multiple sexual partners, unprotected sex and transactional sex are considered risky sexual behaviour worldwide and continue to pose risks of sexual transmitted infections, unwanted pregnancy as well as increased termination of pregnancy amongst young people. The reported study was aimed at describing factors associated with risky sexual behaviour amongst students at Vhembe Technical Vocational Education and Training College. Within the quantitative paradigm, the study adopted a descriptive, cross-sectional survey design to describe factors associated with risky sexual behaviour amongst students. The targeted population were all the registered students at Vhembe Technical Vocational Education and Training College, Mashamba Campus. Self-administered questionnaires with close ended questions were administered to 307 students whom were sampled using a simple random technique. Out of 307 students, 217(70.3%) were females and 90 (29.3%) were males. The Statistical Package for Social Sciences version 23.0 was used to manage and analyse data. The study results revealed that demographic factors such as gender, age and sexual orientation contributed to students in engaging in risky sexual behaviour. A majority of the male students 64 (61.2%) were found to be having multiple sexual partners as compared to 107(54.2%) female students. Students aged 21-24 years 98(31.9%) were having multiple sexual partners. The study further revealed that sexual orientation contributes to students engaging in risky sexual behaviour. The students who reported that they were bisexual, gay or lesbian 33 (84.6%) were not using condoms. Environmental factors such as staying alone in a rental place contributed to students engaging in risky sexual behaviour. A majority 97(51.2%) of college students who were staying at a rental place were engaging in unprotected sex. In this study, socio-economic factors such as depending on National Financial Aid Scheme have been identified as the main driver of transactional sex. About 131(49%) students who depend on National Financial Aid Scheme reported were found to be prone to engaging in transactional sex. The study recommends that the Department of Health and Department of Education initiate strategies such as having a clinic inside the Technical Vocational Educational and Training College and peer educators to expand knowledge of students on risky sexual behaviour and on lesbian, gay, bisexual transgender and intersex.

MPH / Department of Public Health / Condoms protect against unplanned pregnancy and sexually transmitted infections, including HIV, among all population groups including adolescents. Correct use of condoms prevents between 80% and 95% of HIV transmission. Furthermore, the usefulness of condoms in preventing pregnancy or STIs rests on the user. Thus, the possibility of pregnancy or STI transmission is greater when condoms are not utilised appropriately and regularly with every sexual act. The aim of the study was to determine the knowledge, attitudes and practices of high school learners on the use of condoms in the Greater Giyani Municipality. A quantitative, descriptive research design was used. The researcher used a probability-stratified random sampling method to select respondents from schools that were selected to participate in the study. A self-administered questionnaire consisting of close-ended questions was used to collect data. The questionnaires were given to learners to complete. Data were analysed using the Statistical Package for Social Sciences (SPSS), version 24. Descriptive and inferential statistics were used during data analysis. Data are presented in charts and frequency tables. Most of the respondents were aged 15-17 years (57.8%). There were more female than male respondents in the study and most respondents lived with both parents (14.9%). There were more respondents in Grade 12 (37.3%) than in other grades: 27.7% of the respondents were in Grade 10, while 35% were in Grade 11. Most of the respondents (88.7%) knew that condoms offer protection against HIV/AIDS, STIs and pregnancy, but many held negative attitudes towards condoms (56.5%) because they thought that condoms reduced pleasure during sexual intercourse. The majority (77.3%) of the respondents had engaged in sex, and half of these (50%) sometimes used condoms when they engaged in sexual intercourse. Male respondents were found to have power over xiii their partners on the making of decisions regarding condom use. Peer pressure was found to be one of the most significant factors that influenced condom use. Parents and guardians of the respondents were discovered to have communicated about sexual issues with their children. High school learners should be encouraged to refrain from using substances such as alcohol, because when they are under the influence of these substances and engage in sexual intercourse they can be unwilling to use condoms . / NRF

Due to rising energy costs and concerns about global climate change, high performance buildings are more in demand than ever before. With roughly 20% of the total energy consumption in the United States being devoted to residential use, this sector represents a significant opportunity for future savings. There are many guidelines and standards for reducing building energy consumption. One of the most stringent is the Passive House Standard. The standard requires that that air infiltration is less than or equal to 0.6 air changes per hour at a 50 Pascal pressure difference (ACH 50), annual heating energy is less than or equal to 15kWh/m2, and total annual source energy is less than or equal to 120 kWh/m2. For comparison, the typical West coast US residence has an ACH50 of 5 and annually uses more than 174 kWh/m2 of source energy according to the 2009 Residential Energy Consumption Survey. With these challenging requirements, successful implementation of the Passive House Standard requires effective strategies to substantially reduce energy consumption for all end uses. Heating and cooling loads are low by necessity in a Passive House. As such this makes end uses like water heating a much larger fraction of total energy use than they would be in a typical building. When air to water heat pumps are employed the energy consumption by water heating is lowered significantly. By employing innovative heat recovery strategies the energy consumption for water heating and HVAC can be reduced even further. This study uses energy modeling and project cost analysis to evaluate three innovative control strategies. Results for a Passive House in Portland Oregon show a savings of about $70 annually with a payback period of 10 years. The same Passive House in Fairbanks Alaska with a different strategy would save $150 annually with a payback period of 5 years.

No description available.

Thesis: B.S., Massachusetts Institute of Technology, Department of Mechanical Engineering, 1981 / Lacks leaf 38. / by Eric Brian Shain. / B.S. / B.S. Massachusetts Institute of Technology, Department of Mechanical Engineering

Criminology / M. Tech. (Policing)

The atmospheric boundary layer (ABL) is the layer of air directly influenced by the Earth’s surface and is the layer of the atmosphere most important to humans as this is the air we live in. Methods for measuring the properties of the ABL include three general approaches: satellite-based, ground- based and airborne. A major research challenge is that many contemporary methods provide a restricted spatial resolution or coverage of variations of ABL properties such as how wind speed varies across a landscape with complex topography. To enhance our capacity to measure the properties of the ABL, this thesis presents a new technique that involves a small unmanned aircraft system (sUAS) equipped with a customized payload for measuring wind speed and particulate matter. The research presented herein outlines two key phases in establishing the proof-of-concept of the payload and its integration on the sUAS: (1) design and testing and (2) field demonstration. The first project focuses on measuring wind speed, which has been measured with fixed wing sUASs in previous research, but not with a helicopter sUAS. The second project focuses on the measurement of particulate matter, which is a major air pollutant typically measured with ground- based sensors. Results from both proof-of-concept projects suggest that ABL research could benefit from the proposed techniques.

Criminology and Security Science / M. Tech. (Policing)

Introdução:O comprometimento de determinados grupos musculares e alterações sensório motoras são algumas das características apresentadas por crianças com paralisia cerebral, fazendo-se necessária a utilização de andadores e estabilizadores para auxiliar no ortostatismo e na marcha desses pacientes. Atualmente, existem equipamentos que favorecem estes aspectos, porém o custo ainda é bastante alto, tornando-os inacessíveis a uma grande parcela da população. Com o intuito de se apresentar uma alternativa de qualidade e custo reduzido, desenvolveu-se na UTFPR um andador/ estabilizador baseado no protocolo PediaSuit™, confeccionado em PVC. O suporte é dado através de elastômeros fixados a um cinto, permitindo assim uma marcha mais próxima do natural. Objetivo: Avaliar a marcha e a postura de crianças com Paralisia Cerebral a partir do uso de uma Unidade Terapêutica Domiciliar de baixo custo e baixa mecanização. Método: Foram realizados testes visando analisar a resistência mecânica do material utilizado e ensaios com o protótipo construído. O PVC mostrou ser um material com alta resistência nos testes de flexão e impacto. A massa máxima suportada pelo andador no teste realizado foi de aproximadamente 226 kg. Após a avaliação do equipamento, três crianças foram filmadas utilizando o andador em PVC e um andador comum. Aspectos da marcha e da postura foram avaliados por trinta fisioterapeutas através desses vídeos.Resultados: O andador em PVC apresentou melhores resultados em relação a todos os aspectos da marcha avaliados, promovendo uma deambulação mais próxima do normal. Em relação à resistência mecânica, os ensaios mostram que o PVC Ø32mm é um material adequado para a confecção de equipamentos de tecnologia assistiva, por ser capaz de suportar cargas elevadas sem se romper. A utilização desse material também proporcionou uma redução significativa no custo final do equipamento / Introduction: The involvement of certain muscle groups and sensorimotor deficits are some of the characteristics displayed by children with cerebral palsy, making necessary the use of stabilizers and gait trainers to assist posture and gait of those patients. There are assistive technology devices that promote these aspects, but the cost is still quite high, making them inaccessible to most people. In order to present an alternative with lower cost, a PVC stabilizer/ gait trainer based on PediaSuit™ protocol was developed at UTFPR and Vitória Research Center. The support is provided by elastomers fixed to a belt, thereby allowing a more natural gait pattern. Objective: To evaluate the gait and posture of children with cerebral palsy during the use of a low cost/ low mechanization Therapy Unit Homecare. Method: Some tests were carried out to determine the strength of the prototype and the material itself. PVC proved to be a material with high strength in bending and impact tests. The maximum mass supported by the walker in the test conducted was approximately 226 kg. After evaluating the equipment, images of three children using a reguar gait trainer and the PVC home care unit were taken. Aspects of gait and posture were analysed by thirty physiotherapists through these videos. Results: The PVC home care unit showed better results in regarding all aspects of gait evaluated by promoting closer to normal gait. The mechanical strength tests show that PVC Ø32mm is a suitable material for fabrication of assistive technology equipment, to be able to withstand high loads without breaking. The use of this material also provided a significant reduction in the final cost of the product.

Introdução:O comprometimento de determinados grupos musculares e alterações sensório motoras são algumas das características apresentadas por crianças com paralisia cerebral, fazendo-se necessária a utilização de andadores e estabilizadores para auxiliar no ortostatismo e na marcha desses pacientes. Atualmente, existem equipamentos que favorecem estes aspectos, porém o custo ainda é bastante alto, tornando-os inacessíveis a uma grande parcela da população. Com o intuito de se apresentar uma alternativa de qualidade e custo reduzido, desenvolveu-se na UTFPR um andador/ estabilizador baseado no protocolo PediaSuit™, confeccionado em PVC. O suporte é dado através de elastômeros fixados a um cinto, permitindo assim uma marcha mais próxima do natural. Objetivo: Avaliar a marcha e a postura de crianças com Paralisia Cerebral a partir do uso de uma Unidade Terapêutica Domiciliar de baixo custo e baixa mecanização. Método: Foram realizados testes visando analisar a resistência mecânica do material utilizado e ensaios com o protótipo construído. O PVC mostrou ser um material com alta resistência nos testes de flexão e impacto. A massa máxima suportada pelo andador no teste realizado foi de aproximadamente 226 kg. Após a avaliação do equipamento, três crianças foram filmadas utilizando o andador em PVC e um andador comum. Aspectos da marcha e da postura foram avaliados por trinta fisioterapeutas através desses vídeos.Resultados: O andador em PVC apresentou melhores resultados em relação a todos os aspectos da marcha avaliados, promovendo uma deambulação mais próxima do normal. Em relação à resistência mecânica, os ensaios mostram que o PVC Ø32mm é um material adequado para a confecção de equipamentos de tecnologia assistiva, por ser capaz de suportar cargas elevadas sem se romper. A utilização desse material também proporcionou uma redução significativa no custo final do equipamento / Introduction: The involvement of certain muscle groups and sensorimotor deficits are some of the characteristics displayed by children with cerebral palsy, making necessary the use of stabilizers and gait trainers to assist posture and gait of those patients. There are assistive technology devices that promote these aspects, but the cost is still quite high, making them inaccessible to most people. In order to present an alternative with lower cost, a PVC stabilizer/ gait trainer based on PediaSuit™ protocol was developed at UTFPR and Vitória Research Center. The support is provided by elastomers fixed to a belt, thereby allowing a more natural gait pattern. Objective: To evaluate the gait and posture of children with cerebral palsy during the use of a low cost/ low mechanization Therapy Unit Homecare. Method: Some tests were carried out to determine the strength of the prototype and the material itself. PVC proved to be a material with high strength in bending and impact tests. The maximum mass supported by the walker in the test conducted was approximately 226 kg. After evaluating the equipment, images of three children using a reguar gait trainer and the PVC home care unit were taken. Aspects of gait and posture were analysed by thirty physiotherapists through these videos. Results: The PVC home care unit showed better results in regarding all aspects of gait evaluated by promoting closer to normal gait. The mechanical strength tests show that PVC Ø32mm is a suitable material for fabrication of assistive technology equipment, to be able to withstand high loads without breaking. The use of this material also provided a significant reduction in the final cost of the product.