The crime prevention literature often contrasts “social prevention” and “situational prevention.” Social prevention focuses on reforming individuals through social policies. Situational prevention seeks instead to reduce crime by altering the settings or conditions in which we carry out daily routines, and avoids trying to change offender dispositions. Yet offender dispositions are not their on...

Half of all new human immunodeficiency virus (HIV) infections in the United States occur among young people between the ages of 13 and 24. Sexual transmission accounts for most cases of HIV during adolescence. Pediatricians can play an important role in educating adolescents about HIV prevention, transmission, and testing, with an emphasis on risk reduction, and in advocating for the special ne...

Thirty hips affected by congenital dislocation or subluxation underwent surgical treatment between the ages of five and fifteen years, and the results are presented. Reduction was aided by concurrent femoral shortening in seventeen. An aggressive approach in older children not only relieves the presenting symptoms in most, but also, by improving the anatomical relationships, increases the prosp...

the main aim of this research was to estimate the genetic and phenotypic parameters for productive and reproductive traits of esfahan native chickens. traits included body weights at hatch (bw1), 8 weeks of age (bw8), 12 weeks of age (bw12), and at sexual maturity (wsm)], age at sex maturity (asm), egg number (en), average egg weight (aew) in the first 12 weeks of production, and egg production...

In what follows, a variety of physical unknowables will be discussed. Provable lack of physical omniscience, omnipredictability and omnipotence is derived by reduction to problems that are known to be recursively unsolvable. “Chaotic” symbolic dynamical systems are unstable with respect to variations of initial states. Quantum unknowables include the random occurrence of single events, compleme...

Methylmercury (MeHg) is especially toxic to the developing central nervous system. In order to understand the reasons for this age-dependent vulnerability, we compared the effects of MeHg on formation of reactive oxygen species (ROS) and mitochondrial function in striatal synaptosomes obtained from rats of various ages. Basal ROS levels were greater, and basal mitochondrial function was lower, ...