M Nettleman,KS Ingersoll,SD Ceperich 摘要: OBJECTIVES: To evaluate demographic and behavioural characteristics of sexually active women compared to those who had abstained from intercourse in the past 6 months. METHODS: The study participants were women of childbearing age from six sites in three ...
The method of added diphenylamine can inhibit the self-oxidation of coal effectively, the action mechanism of diphenylamine was analyzed by free radical chain reaction, and this research can offer new method for the development of new flame retardant. 展开 关键词: Coal Low-temperature oxidation ...
involving three ethnic groups living in contiguous regions in central Canada: Oji-Cree Indians from several reserves in northern Ontario and Manitoba, Inuit from the Keewatin region of the Northwest Territories, and non-Aboriginal Canadians (predominantly of European heritage) in the province of ...
There are some similarities or commonalities between English for Science and Technology(EST)and everyday English in terms of vocabulary,expression and grammar.However,scientific English has its own characteristics.This paper summarizes some features of EST and illustrates translation techniques and study me...
Factors involving an adolescent girl's relationship with her partner (e.g., being in a relationship, length of relationship, time spent with boyfriend, or satisfaction with boyfriend) were not significantly associated with the desire for pregnancy. Effective pregnancy and sexually transmitted disease ...
If the full range of applications and protocols that exploit vehicular networks are going to be adopted then it is key to understand the performance characteristics of these net-works: both the spatial and temporal properties. Many of the applications, services and protocols that could drive de-pl...
Four years of participant tracking data (N = 24,995) for community-based programs targeting risk factors are presented. Over two-thirds of contacts were female; age segment representation in these programs was comparable to the city's demography. However, the data show that programs of varying...
Undergraduate college students (N = 173) enrolled in business or psychology classes were studied to investigate (1) predictors of anti-gay and lesbian atti... AL Cotten-Huston,BM Waite - 《Journal of Homosexuality》 被引量: 115发表: 1999年 Students' attitudes toward playing games and using ga...
Concerning to the system of oxygen/recycled flue gas combustion for the removal of carbon dioxide from pulverized-coal firing power plants, combustion characteristics of pulverized coal and the heat absorption performance of boiler furnace were studied. To determine the ignition characteristics in the CO...
The additional effect of the external shear on the mean velocity and turbulent energy budget distributions in the inner region of the boundary layer is found to be small. In the outer region, the ‘wake’ component of the mean velocity defect is lowered by the presence of free-...