Axiomatizing Relativistic Dynamics without Conservation Postulates

A part of relativistic dynamics is axiomatized by simple and purely geometrical axioms formulated within first-order logic. A geometrical proof of the formula connecting relativistic and rest masses of bodies is presented, leading up to a geometric explanation of Einstein’s famous E = mc ². The connection of our geometrical axioms and the usual axioms on the conservation of mass, momentum and four-momentum is also investigated.     

腹腔肿块外科处理的临床决策

临床经常会面对诊断、来源、性质不清的腹腔内肿块。腹腔内肿块是临床常见的病症之一,大多需要外科手术。如何合理应对、妥善处置、科学决策是临床医师对本病诊治的要求和不懈追求。诊断的过程中,依靠详尽的病史、细致的体格检查、恰当的辅助检查,并进行综合的分析以及逻辑思维,做出正确的鉴别和诊断,以解决是否为腹腔内肿块;而后,尽快确定肿块的部位及性质,确定处理的方法和原则,制订详尽的手术方案和步骤。     

Racial/ethnic differences in Body Mass Index: the roles of beliefs about thinness and dietary restriction

The greater BMI of African American relative to Caucasian women is implicated in racial/ethnic disparities in health outcomes. The principal aim of the current study was to evaluate a theoretical account of racial/ethnic differences in BMI. Thin-ideal internalization, the perceived romantic appeal of thinness, dietary restriction, weight, and height were assessed via self-report measures on a sample of female undergraduates of African American (n = 140) and Caucasian (n = 676) race/ethnicity. Using structural equation modeling, support was obtained for the primary hypothesis that racial/ethnic differences in BMI are explained by Caucasian women's greater thin-ideal internalization and perceived romantic appeal of thinness, thereby resulting in greater levels of dietary restriction. Current findings illustrate the potential for racial/ethnic differences in sociocultural standards of appearance to influence racial/ethnic disparities in physical health, of which BMI is a marker, via effects on weight control behavior.     

群体性事件集群行为的动员与组织机制

群体性事件指部分群众与当地党政部门或强势社会集团的对抗性冲突。是当下我国典型的集群行为。社会心理学对集群行为动员机制的研究主要包括群体相对剥夺、群体认同、群体(愤怒)情绪和群体效能; 对集群行为组织机制的研究主要包括速生规范、谣言和去个体化。其中, 群体愤怒和群体效能既属于动员机制, 同时又在组织机制中发挥作用。这些因素之间有待于进一步整合, 以期对现阶段我国社会频发的群体性事件的心理因素进行解释和探讨。     

Notes on Cultures of Violence, Cultures of Caring and Peace, and the Fulfillment of Basic Human Needs

Some conditions in the lives of children, adults, and groups can be construed as fulfilling universal human psychological needs. The constructive fulfillment of these basic needs promotes caring and positive, helpful relations; their frustration creates an inclination toward hostility and aggression. The article describes diverse influences that can lead to violence between individuals, groups, and societies, as well as ways to halt and prevent genocide, mass killing, and other intergroup violence, including terrorism, in part by fostering culture changes that promote harmony and peace. Ideally such culture change would involve healing from past wounds, the creation of positive (rather than destructive) ideologies, supportive communities, reconciliation and the creation of a shared collective memory, education that promotes peace, and the development of inclusive caring in children. The article also refers to work in Rwanda that aims to foster healing and reconciliation, in part by helping people understand the roots of violence and its implication for prevention. Societies and families that help to fulfill basic needs promote goodness as well as optimal human functioning—the continued growth and development of individuals.     

Mass Murder: An Analysis of Extreme Violence

Mass murder involves the slaughter of four or more victims by one or a few assailants within a single event, lasting but a few minutes or as long as several hours. More than just arbitrary, using this minimum body count—as opposed to a two- or three-victim threshold suggested by others (e.g., Ressler et al., 1988, Holmes and Holmes, 2001)—helps to distinguish multiple killing from homicide generally. Moreover, by restricting our attention to acts committed by one or a few offenders, our working definition of multiple homicide also excludes highly organized or institutionalized killings (e.g., war crimes and large-scale acts of political terrorism as well as certain acts of highly organized crime rings). Although state-sponsored killings are important in their own right, they may be better explained through the theories and methods of political science than criminology. Thus, for example, the definition of multiple homicide would include the crimes committed by Charles Manson and his followers, but not those of Hitler's Third Reich, or the 9/11 terrorists, despite some similarities in the operations of authority.     

Sensationalising sex offenders and sexual recidivism: Impact of the Serious Sex Offender Monitoring Act 2005 on media reportage

Differences in extent and nature of newspaper media reporting before and after the introduction of the Serious Sex Offender Monitoring Act 2005 in Victoria were investigated, critically exploring the interface between psychological, media and criminological disciplines. Forty‐three news items before the Act and 90 after the Act were analysed using a thematic and discursive framework. A significant increase in the number of items was found after the Act but other discursive and thematic findings were mixed. Several indicators of sensationalism such as headline size, tone, and theme did not differ between time frames, while there was a significant increase in the incidence of case‐based and high‐profile case reporting after the introduction of the Act. Hence, although the discourse and frames within which serious sex offenders are reported has remained similar over time, the introduction of the Act has dramatically impacted on the frequency of reporting in such cases. The findings are congruent with the extant literature on the newsworthiness of child sexual offending, indicating a need for media outlets to be more responsible in their reporting, and for legislators to enact legislation based upon empirical evidence.     

Accuracy of parents' reports of height and weight

The accuracy of parents' reports of their own height and weight and the height and weight of their obese children, who were about to enter a weight control program, was assessed. Measured height and weights of 146 mothers, 55 fathers, and 150 children who attended a screening session were compared to the heights and weights they had previously reported on a demographic questionnaire. Eighty-four percent of the reported weights were accurate within ±5 lbs.; 71% of the reported heights were accurate within ±1 in. Parents' reports of weight tended to underestimate actual weights, with the magnitude of underestimation greater for mothers than for fathers, while reported heights overestimated actual height, with the magnitude of overestimation greatest for fathers. Errors in the parents' reports of children's weight were related to the child's actual weight and body mass index (BMI), with substantial underestimation of actual weight in the heaviest decile of children in the sample.Preparation of this paper was supported in part by Grant HDMH12520-01 from the National Institute of Child Health and Human Development and Mental Health. Reprints can be obtained from Rena R. Wing, Western Psychiatric Institute and Clinic, 3811 O'Hara Street, Pittsburgh, PA 15261.     

Male physical attractiveness in Britain and Malaysia: A cross-cultural study

Three purported cues to perceived male physical attractiveness are the waist-to-chest ratio (WCR), body mass index (BMI) and the waist-to-hip ratio (WHR). This study examined the relative contribution of each cue in several socio-economically distinct populations. Ninety-five female participants from Britain and Malaysia were asked to rate a set of images of real men with known WCR, BMI and WHR. The results showed clear differences along a gradient of socio-economic development. In urban settings, WCR was the primary component of attractiveness ratings, with BMI playing a smaller role and WHR not reaching significance. In the rural setting, BMI was the primary predictor of attractiveness, with WCR playing a more minor role and WHR not reaching significance. In general, urban participants were more reliant on body shape and chose a relatively slim figure with an ‘inverted triangle’ shape; rural participants were more reliant on body weight and chose a heavier figure with a less triangular shape. These findings are discussed in terms of evolutionary psychological explanations of mate selection and sociological theories that emphasise the effect of resource scarcity on preferences for body shapes and sizes.     

In Defense of the Responsibility to Protect

This essay responds to Esther Reed's recent critique of the Responsibility to Protect (R2P) principle in this journal. It argues that Reed fundamentally misunderstands and misrepresents R2P. Her critique of R2P would have served well as a critique of the earlier concept of humanitarian intervention had it been penned in the late 1990s. But most of the problems and dangers that Reed identifies are in reality the very problems and dangers that R2P seeks to overcome, and I suggest that it does overcome them quite successfully. R2P does not impose Western ideals on the rest of the world, weaken the legal restrictions on the use of force, or promote abusive interventionism. Rather, it offers a bold but carefully constructed framework that holds the promise of promoting the protection of vulnerable populations from mass atrocities.