美国大学的办学理念及其影响

美国的大学使用英语作为教学用语,其著名大学的排名位居世界前列,使成千上万的海外学子赴美求学.美国大学对世界的影响在于其先进的理念和良好的学术环境.     

Examining the Mediating Effect of Self-Efficacy on Approval of Aggression and Proactive Aggression

Proactive aggression (PA) is goal-directed, hostile social behavior that has been linked to detrimental outcomes. It has been theorized that adolescents who believe aggression is a normal and acceptable social response (approval of aggression) are more likely to show PA. Confidence in one’s ability to behave aggressively (self-efficacy about aggression) is understood to mediate this relationship. A mixed-gender sample of 860 Australian, 12–14 year old adolescents was used to investigate gender differences and the mediating effect of self-efficacy for aggression on the relationship between approval of aggression and PA. As hypothesized, approval of aggression, self-efficacy, and PA demonstrated significant positive relationships, with males also scoring significantly higher on these three variables than females. Furthermore, self-efficacy was found to significantly and partially mediate the relationship between approval of aggression and proactive aggression for both genders. Implications for the understanding and prevention of aggressive behavior in adolescents are discussed.     

A Constructive Quality: The Press,The CIA,and Covert Intervention in the 1950s

This article examines the relationships between the CIA and the US domestic press during the 1950s through the lens of CIA covert interventions in Guatemala and Indonesia. It disputes interpretations of the press/CIA relationship that argue for significant control exercised by the CIA, and contends that there were several types of press/CIA relationship, ranging from cooperation to hostility. The most common relationship was one of friendly confluence, rooted in Cold War considerations; even well-disposed reporters, though, tended to be careful about preserving their independence. This article concludes that while the CIA/press relationships generally resulted in reporting favorable to the CIA, there were counter-trends in the 1950s that laid the groundwork for the later collapse of the CIA's public image.     

The Geography of Empire

Abstract

Wealth and poverty, overdevelopment and underdevelopment, are sides of the same coin; in a capitalist system the one cannot exist without the other. This is as true at the global level as at the national level, and the U.S. Empire consists of both external and internal colonies (e.g. the ghettoes or the Indian and Chicano communities of the Southwest).     

Supreme Court Appointments as a Move-the-Median Game

A three-stage model isolates conditions under which an executive appointment to a collective choice body, such as a court or a regulatory agency, has an immediate bearing on policy. The model strikes a balance between previous formal models that predict either excessive gridlock or excessive policy responsiveness as a consequence of the politics of appointments. I test the model using approximately four decades of data on U.S. Supreme Court appointments. Two hypotheses summarize the unique predictions of the model and are strongly corroborated. A third, less distinctive hypothesis about strategic judicial retirements is weakly supported .     

Identification and isolation of male cells using fluorescence in situ hybridisation and laser microdissection, for use in the investigation of sexual assault

In cases of sexual assault involving an azoospermic assailant, vaginal swabs taken from the victim may fail to provide an autosomal DNA profile with which to search a suspect database, as the signal from any male cells present would be masked by that from the overwhelming number of female cells collected on the swab. Here, we describe a method of visually identifying diploid male cells in such samples using fluorescence in situ hybridisation, and selectively harvesting them by means of laser microdissection. This combination of techniques was tested on 26 post-coital vaginal swabs taken at a range of times after intercourse; the collected cells were then subjected to a simple lysis procedure and DNA was amplified using the AmpFlSTR^® SGMPlus^® multiplex under low copy number conditions. Useful DNA profiles were generated from samples taken up to 24 h after intercourse.