This is the final technical report for NASA Grant No. NGR 11-002-133. The research under this grant consisted of elastohydrodynamic lubrication (ehd) studies and pressure-viscosity studies. Existing equipment was modified to more closely simulate practical ehd conditions. Analyses of ehd and pressure-viscosity data on eleven fluids previously investigated for NASA were also conducted. Near the ...

Haemangioma of the cervix is an extremely rare benign lesion, and only a few sporadic cases have been reported to date. In the present report we describe a case of Haemangioma of the cervix that was diagnosed in a 28-year-old patient who consulted for post coital bleeding.

Research has suggested the roles of several factors and processes which may affect the timing of first intercourse among adolescents. The roles of pubertal timing, family socialization, psychosocial adjustment, bonds to conventional institutions, problem behavior, and socioeconomic status in the timing of first intercourse were assessed in a sample of 123 male and 166 female White rural adoles...

To assess the possible biological significance of the observations that women with cervical cancer tend to be younger at first intercourse than control women, data from 1823 women were analyzed for the relationship between age at 1st intercourse and number of sex partners. Women who were younger at first intercourse had more sex partners than did women who were older at first intercourse. The i...

OBJECTIVE To examine the relation between frequency of sexual intercourse and risk of ischaemic stroke and coronary heart disease. DESIGN Cohort study with 20 year follow up. SETTING The town of Caerphilly, South Wales and five adjacent villages. SUBJECTS 914 men aged 45-59 years at time of recruitment in 1979 to 1983. MAIN OUTCOME MEASURES Ischaemic stroke and coronary heart disease, a...

Background Implantation failure is the most important cause of recurrent in vitro fertilization/intra cytoplasmic sperm injection (IVF/ICSI) failure. Several reports suggest that intercourse during the peritransfer period might improve pregnancy rates. This study is designed to determine whether intercourse during the peritransfer period will improve pregnancy and implantation rates in patients...

OBJECTIVE To explain the influence of parental monitoring on adolescent sexual initiation within the context of a cognitive behavioral model. DESIGN, SETTING, AND PARTICIPANTS Virginal youth (N = 307) recruited from a health maintenance organization adolescent medicine clinic were interviewed at baseline and at 6 months about parental monitoring and other known cognitive factors associated wi...

Aims: Past studies on age at first sexual intercourse among South African youth have been largely cross-sectional and lack theoretical basis. This paper investigates factors influencing first sexual intercourse among South African youth using Waves 1-3 of Cape Area Panel Study (CAPS) data, based on Social Cognitive Theory. Methods: This quantitative data was analysed using Stata 12, and employs...