This thesis deals with comprehensive study and design of recovery system of a road vehicle powered by human power. It contains an overview of different types of heat recovery devices, their characteristics, advantages, disadvantages and applicability in the construction of such a vehicle.

This diploma thesis concerns the design proposal for a bicycle gearbox powered by human force. The first part summarizes the existing solutions. The second part includes the proposal of the new design, together with the calculation of the strength for selected parts. Attached are the drawings documenting the findings.

This diploma thesis deals with vehicles that are driven by human power, namely the design of a bicycle frame intended for city traffic. Part of the work is a section that describes the historical development of cycling bikes, as well as an overview of individual bicycle conceptions, focusing on their advantages and disadvantages

This thesis deals with comprehensive study and design of recovery system of a road vehicle powered by human power. It contains an overview of different types of heat recovery devices, their characteristics, advantages, disadvantages and applicability in the construction of such a vehicle.

Background: More than 90 % of anal cancers are caused by high-risk human papillomavirus (HR HPV) infection and a history of cervical intraepithelial neoplasia (CIN) and cervical cancer is established as possible risk factor. The aim of this study was to demonstrate relationship between anal and cervical HPV infection in women with different grades of CIN and microinvasive cervical cancer and to determinate potential risk factors for concurrent cervical-anal HPV infection. Methods: A total of 272 women were enrolled in the study. The study group included 172 women who underwent conization for high-grade CIN or microinvasive cervical cancer. The control group consisted of 100 women with non-neoplastic gynecologic diseases or biopsy- confirmed CIN 1. All participants completed a questionnaire detailing their medical history and sexual risk factors and were subjected to anal and cervical HPV genotyping using Lynear array test (Roche). Results: Cervical, anal, and concurrent cervical-anal HPV infections were detected in 82.6 %, 48.3 % and 42.4 % of women in the study group, and in 28.0 %, 26.0 % and 8.0 % of women in the control group, respectively. The prevalence of the HR HPV genotypes was higher in the study group and significantly increased with the severity of cervical lesion. Concurrent infections...

Thesis (MPH.) -- University of Limpopo, 2020 / Background of the study: Cervical cancer is a disease that is described as the state of overgrowth of tissue resulting from the disorganisation of cell division that is preceded by several earlier cervical changes, especially at the squamocolumnar junction of the cervix. Factors such as HPV, which is a sexually transmitted infection (STI), low socioeconomic status (SES), intercourse at a very early age, numerous childbirths, poverty and limited access to health care, are some of the contributing risk factors for cervical cancer. Most women in developing countries only seek professional help once the malignancy is already at an advanced stage. Purpose of the study: The aim of the study was to investigate the determinants of cervical cancer in patients seen in the gynaecology clinic at Mankweng hospital. And the objectives were: to profile the sociodemographic characteristics; to profile the contributory risk factors; and, to determine the association of risk factors for cervical cancer with the socio-demographic characteristics of the patients seen in the gynaecology clinic at Mankweng hospital. Research methodology: A quantitative, cross-section descriptive study, which has been validated and used in several studies globally, was conducted at Mankweng hospital, which is a tertiary referral academic hospital in the Limpopo Province, following all cervical cancer patients consulting at gynaecology outpatient clinic during the study period. Data were collected using a structured questionnaire and entered into computer software and analysed. Research findings: Thirty-seven percent of the women who participated in this study were single, 27% were married, 27% widowed and only 9% were divorced. Nearly half (46%) of the participants had secondary education and only 8% had tertiary education. The majority (91%) of the women were unemployed and only 9% were employed. The majority (40%) of the women were at stage II cervical cancer. Nearly two-thirds (62%) had had multiple partners. At the time of the study, 94% of the participants did not have multiple partners. Nearly two-thirds (64%) of the participants had heard about Pap smears before their current diagnosis and 62% of the participants had had a Pap smear before the current results. Few participants smoked cigarette (2%) or used contraceptive (3%). The young age group, single, divorced, with secondary and v tertiary education were more likely to be HIV positive. And the elderly, divorced, widowed and less educated were more likely to have high parity. Recommendations and conclusions: Information about the risk factors for developing cervical cancer, specifically the transmission of HPV, needs to be disseminated to young people. Rather than initiating cervical screening by age group, which may result in young women being refused screening irrespective of their risk, cervical screening guidelines should stipulate the initiation of cervical screening and HPV vaccine from the age of 15 onwards. Present study suggests that young women may be more prone to HPV and HIV due to the fact that young women who are single or divorced, with tertiary education were more likely to have multiple partners, which places them in a risk-based cervical screening target group. A final recommendation and conclusion is that a long-term, in-depth study on cervical cancer in young women in relation to the presence of the risk-factors should be carried out. Attempts should be made to reach women who rarely visit health care services.

Immigrant clinicians are vital to population healthcare delivery and therefore population health. One in four physicians in the USA is foreign-born and notably represented in family and pediatric medicine—specialties charged with administering childhood/adolescent vaccines, such as human papillomavirus vaccine (HPVV). Our examination suggests there may be unique cultural and socialization factors that influence clinician HPVV recommendation practice; however, immigrant clinicians have not been adequately engaged within the national HPVV agenda. Given the volume and significance of immigrant clinicians, engagement of these clinicians, in both community and nation-wide efforts to increase HPVV, is a necessary step for improving and achieving the national health goal of optimizing HPVV for cancer prevention.

Immigrant clinicians are vital to population healthcare delivery and therefore population health. One in four physicians in the United States are foreign-born and notably represented in family and pediatric medicine–specialties charged with administering childhood/adolescent vaccines, such as Human Papillomavirus vaccine (HPVV). Our examination suggests there may be unique cultural and socialization factors that influence clinician HPVV recommendation practice; however, immigrant clinicians have not been adequately engaged within the national HPVV agenda. Given the volume and significance of immigrant clinicians, engagement of these clinicians, in both community and nation-wide efforts to increase HPVV, is a necessary step for improving and achieving the national health goal of optimizing HPVV for cancer prevention.

Introduction: Juvenile onset recurrent respiratory papillomatosis (JoRRP) is the commonest benign paediatric neoplasm. There is no curative treatment, but the condition is self-limiting. Current primary treatment is aimed at symptomatic relief, comprising of serial surgical debulking of obstructive papillomas along the respiratory tract, with voice preservation. Adjuvant therapy is indicated in severe cases. Objective: A review of children with JoRRP presenting to the ENT Department at Red Cross War Memorial Children’s Hospital (RCWMCH) over 2 years. Evaluation of the pattern of disease and factors that may contribute to disease severity were reviewed. Method: Retrospective folder review of children with histologically confirmed laryngeal papillomatosis over above the time period. Results: Twenty children were included. Nine were male, 11 were female. The median age at diagnosis was 2.4 years (11 - 109 months). Presentation at < 3 years was noted in 5/7 of the most severe cases. Nine of 20 were HPV serotyped; 5 were type 11, and 4 were type 6. Eighty percent (16/20) were HIV negative; 10% (2/20) HIV positive; and 10% (2/20) were unknown. A total of 90 surgical procedures were performed; the highest number of surgeries per child was 13. Inter-surgical time was 1 to 164 weeks (median 9 weeks). Four received Gardasil vaccination as adjuvant therapy, 3 of who showed a reduction in disease severity. Conclusion: JoRRP commonly presents around the first 3 years of life. Severe cases can be life-threatening, often with multiple hospital admissions for clearance of surgical papillomata. Severe cases presented before 3 years. Gardasil vaccination as adjuvant therapy has promise. No identifiable risk factors in our review were noted. HIV co-infection and HPV type were not risk factors for severity.

This study applied the constructs of the health belief model (HBM) to assess women's knowledge and attitudes (i.e., perceived susceptibility, perceived severity, perceived benefits and perceived barriers) regarding cervical cancer, HPV, and the HPV vaccine and determine whether they predict women's intentions to receive the HPV vaccine. Women aged 18 to 26 years were surveyed from a convenience sample, and were primarily well-educated White women. Using Polytomous Universal Model (PLUM) ordinal regression, it was determined that the constructs of this model could not predict women's intentions of receiving the HPV vaccine.