Relative to previous studies, these findings also suggest that conceptualizations of abstinence and the classification of oral-genital contact may be changing among young adults. Overall, the primary implication of these findings is that sexual health professionals should be mindful of the interpretative ...
A community sample of 610 adults were grouped into those who reported no experience, others who reported noncoercive sexual contact with an individual that was at most 4 years older, and those who reported more severe . The first two groups did not differ from each other on current social su...
These surveys have shown that species which were formerly considered common and widespread have declined with little comment having been made of these changes. The implications of this are serious, both for these formerly common species and for rarer bird species which have similar ecological ...
Singular systems of the form E = f(x, u, t) are considered tractability is defined, a sufficient condition for tractability is derived, the maximum princip... Neustadt,W Lucien - Interscience 被引量: 4617发表: 1962年 Deterministic and Stochastic Optimal Control Summary This chapter contains sec...
The viral STDs herpes and warts are painful and/or unsightly, while HIV infection is fatal. STD infection may be acquired through sexual contact with the penis, vagina, anus, mouth, and throat. Sexual abstinence, mutual monogamy with a non-infected sex partner, and sexual intercourse with ...