Introduction: The profession of motorbike taxi driver is flourishing in Africa. The aim of this study was to investigate the determinants of traffic accidents involving motorbike taxis. Methods: This was a cross-sectional, descriptive study conducted from 3 January 2020 to 2 February 2020. The study population consisted of motorbike taxi drivers admitted to the emergency department of the Thies regional hospital (Senegal) after a traffic accident. Results: A total of 63 motorbike taxi drivers took part in the study. The average age was 26.7 years. The level of education was low. The average daily takings were 6,627 FCA francs. The drivers were not wearing helmets in 81% of cases. Similarly, 95% had no driving licence. Stress (39.7%), risky sexual behaviour (36.5%), drug use (22.2%) and alcohol consumption (6.3%) were also found. The main causes of accidents were speeding (96.8%), the effect of other road users (96.8%), the driver’s profile (50.8%), the condition of motorbikes (50.8%) and road conditions (14.3%). The regulations in force on motorbike taxis were perceived bad in 57.1% of cases. Reducing police harassment (95.2%), reducing the cost of taxes (90.5%), training in the highway code (69.8%) were the main expectations of drivers. Conclusion: Motorcycle taxi drivers are highly vulnerable to road accidents. The public authorities need to raise awareness and clean up this type of informal transport.

In this work, we studied the influence of the irradiation energy and the magnetic field on the diode current of a solar cell in frequency dynamic regime under monochromatic illumination. After solving the minority charge carrier continuity equation in the presence of irradiation energy and magnetic field, we derive new expressions for the minority charge carrier density and the diode current. Starting from these equations, we have represented the profiles of the latter according to some parameters finally to highlight the effect of the irradiation energy and the magnetic field on the diode current.

Introduction: Smoking constitutes a serious risk to the health of workers. The objective of this study was to evaluate the knowledge of caregivers on the harmful effects of tobacco and their perception of the actions to be promoted for a tobacco-free hospital. Methodology: This was a cross-sectional, descriptive study, carried out from April 1 to May 31, 2021 at the hospitals of Kossodo and Boulmiougou in Ouagadougou. Data collection was done using an anonymous, pre-established self-administered questionnaire. Results: A total of 246 caregivers were participated in the study. The average age was 44.8 years and 77.2% had more than 10 years of seniority in the function. The existence of the anti-tobacco law in Burkina Faso in public places was known by 78.9% of caregivers. Most caregivers were aware of tobacco-related harm (93.5%). The most known tobacco-related pathologies were lung cancer (55.3%), throat cancer (13.8%). Posters (88.2%), the ban on smoking in hospitals (93.9%), staff training (80.5%) and monitoring of compliance with the anti-smoking law (46%) were the major means recommended to achieve a tobacco-free hospital. Conclusion: Caregivers should serve as role models in tobacco control. The establishment of an anti-tobacco surveillance committee in health structures and the strengthening of awareness are to be promoted.

Objectives: It consisted in evaluating psychosocial risk factors among midwives/ maieuticians of Yalgado Ouédrago University Hospital Center of Ouagadougou. Methodology: This was a descriptive, cross-sectional and analytical study, carried out using an anonymous self-questionnaire. The Karasek scale was used to identify risk situations. Data were entered and analyzed using Epi info version 7.0 software. The significance level chosen was p < 5% to assess the link between socio-professional variables and stress. Result: A total of 42 midwives/maieuticians were participated in the study. The average age was 38 years old. Women predominated (71.4%). The average weekly working hours was 45 hours. The average number of monthly guards was 6. The average seniority in the profession was 10.5 years. The prevalence of psychosocial risks was 88.1% for psychological demand, 57.1% for low decision latitude and 64.3% for low social support. Value conflicts (71.4%), job and work insecurity (52.4%) and emotional demands (21.4%) were collected. The prevalence of job train was 52.4% and that of isostrain was 26.2%. The correlation between socio-professional variables and stress was not statistically significant (p˃0.05). Conclusion: Psychosocial risks are omnipresent among midwives/maieuticians. It is urgent to promote the creation of occupational health services in care settings in order to improve the psychosocial environment and to detect the suffering of caregivers early.

An n/p/p+ silicon solar cell under monochromatic illumination with short wavelength is studied in steady state. Photogenerated minority carrier’s density in the base is obtained by solving the diffusion equation with boundary conditions at the surfaces of both the junction and the back. The photocurrent density is calculated and represented as function of junction surface recombination velocity for different absorption coefficient values in the short wavelength range. Then at short-circuit current condition given for large junction recombination values, the back-surface recombination expression is derived as silicon absorption coefficient dependent. As a result, compared with the intrinsic recombination velocity, optimum thickness is extracted for given absorption coefficient corresponding to short wavelength illumination and modeled in mathematic relationship.