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RISS 인기검색어
- 검색키워드
- 저자 : Alsaad, Mohammed A. (검색결과 3 건)
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Knowledge Towards HPV infection and HPV Vaccines among Syrian Mothers
Alsaad, Mohammed A.,Shamsuddin, Khadijah,Fadzil, Fariza Asian Pacific Journal of Cancer Prevention 2012 Asian Pacific journal of cancer prevention Vol.13 No.3
Cervical cancer is caused by HPV infection and can be prevented by early vaccination. Objective: To assess Syrian women's level of knowledge and determinants of good knowledge of cervical cancer, HPV infection and its vaccines. Methods: A cross sectional survey was undertaken among mothers with daughters in sixth grade classes enrolled in primary schools in Aleppo city, Syria. Samples were selected through cluster sampling and data collected using a self-administered questionnaire. Results: Less than a third of the mothers had heard of HPV infection and vaccines against cervical cancer and levels of knowledge were generally low. Good knowledge was associated with high education level, higher family monthly income, having few - less than four children, positive history of cervical cancer screening, and working or having relatives working in the medical field. The main source of information was television and few reported health care providers as a source of knowledge on HPV infection and vaccine. Conclusion: Since knowledge of HPV infection and its connection with cervical cancer and its vaccine are low, more efforts must be made to educate Syrians prior to introduction of any HPV vaccination programme. Public health efforts must focus on educating mothers, the public as well as health care providers.
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Dust accumulation effect on solar thermal energy systems performance
Alsaad, Mohammad A. Techno-Press 2015 Advances in energy research Vol.3 No.3
This research investigates the effect of natural dust accumulation on the glass cover of solar thermal energy conversion systems. Four similar, locally manufactured, flat plate solar collectors are used. All collectors are South oriented with tilt angle of $40^{\circ}$. The glass cover of one collector is kept clean of dust during the experimental period while the second collector is cleaned at the beginning of each month. The third collector is cleaned every two months while the fourth collector is kept un-cleaned throughout the experimental period of four months. The calculated parameters are the solar heat gain rates and the corresponding values of the thermal efficiency. The result of the present work indicates that the percentage of fractional reduction of the useful heat gain rate due to dust accumulation during a period of one and two months is 11.4% and 17.0%, respectively. The percentage decrease of thermal efficiency during the same duration periods is 4.0% and 6.1%, respectively. The percentage of fractional reduction of the useful heat gain rate due to dust accumulation during a period of three and four months is 27.8% and 31.9%, respectively. The percentage decrease of monthly thermal efficiency during the same duration period is 10.2% and 11.3%, respectively.
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Hayder Alsaad,Jae D. Chang 한국생활환경학회 2014 한국생활환경학회지 Vol.21 No.4
Heat retention is important in achieving building energy efficiency during the heating season. Minimizing heat loss through a building’s glass envelope during the night is one means of heat retention. Movable insulation is one way to increase the insulation value of the building envelope and reduce heat loss towards the outdoors. This research examines the performance of aerogel filled polycarbonate movable panels in a building located on a Midwestern college campus in the USA. Onsite measurements were taken using air and surface temperature sensors to determine the effectiveness of the system. Computer simulations were run using Therm 7.2 to explore alternative design options. A cost analysis was also performed to evaluate the feasibility of utilizing movable insulation to reduce the heating bills during winter. Results showed that sealed movable insulation reduces heat loss through the glazing by 67.5%. Replacing aerogel with XPS panels reduces this percentage to 64.3%. However, it reduces the cost of the insulation material by 98%.
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