Effect of aspect ratio on the compressive deformation and fracture behaviour of Zr-based bulk metallic glass

The compressive deformation and fracture features of Zr₅₉Cu₂₀Al₁₀Ni₈Ti₃ bulk metallic glassy samples with aspect ratios in the range of 0.67–2.00 have been investigated. The compressive plastic strain of the glass monotonically increases with decreasing aspect ratio, but the maximum strength almost maintains a constant value of 1.77–1.88?GPa. All the compressive shear-band angles are equal to?～40° if modified by the rotation of the primary shear bands.     

Motivation for Physical Activity among Hawaiian,Japanese, and Filipino University Students in Hawaii

The purpose is to identify the motivations and barriers to physical activity (PA) among the three largest ethnic groups in Hawaii (Hawaiians/part-Hawaiians, Japanese, and Filipinos). University of Hawai'i students (N = 32, aged 18+) self-identified as one of those ethnicities participated in focus groups. There are more common themes than ethnic-specific variations in factors influencing PA. PA is understood as exercise among all groups; leisure time PA like running and surfing are common activities. Results were more similar among Hawaiian and Japanese than with Filipino participants. The findings offer an opportunity for improving cross-cultural and culture-specific PA interventions for those ethnicities.     

Impulsivity Moderates Promotive Environmental Influences on Adolescent Delinquency: A Comparison Across Family, School, and Neighborhood Contexts

The present study examined moderating effects of impulsivity on the relationships between promotive factors from family (family warmth, parental knowledge), school (school connectedness), and neighborhood (neighborhood cohesion) contexts with delinquency using data collected from N?=?2,978 sixth to eighth graders from 16 schools surrounding a major city in the Midwestern United States. More than half of the respondents were non-Caucasian (M _age ?=?12.48; 41.0 % male). Multilevel modeling analyses were conducted to take into account the clustering of the participants within schools. Impulsivity was positively associated with adolescent delinquency. Additionally, family warmth, parental knowledge, and school connectedness, but not neighborhood cohesion, were independently and inversely related to adolescent delinquency. Finally, impulsivity moderated relationships between family warmth and parental knowledge with delinquency but not relationships between school attachment and neighborhood cohesion with delinquency. Specifically, the negative relationship between family warmth and delinquency was significant for adolescents with high levels of, but not for those with below-average levels of, impulsivity. In addition, parental knowledge had a stronger association with decreased levels of delinquency for adolescents reporting higher levels of impulsivity. The moderating effects of impulsivity did not differ for males and females or for minority and non-minority participants. Findings indicate that impulsivity may have greater impact on adolescents’ susceptibility to positive family influences than on their susceptibility to promotive factors from school or neighborhood contexts. Implications for future research and practice are discussed.     

Do parents’ collectivistic tendency and attitudes toward filial piety facilitate autonomous motivation among young Chinese adolescents?

The present study investigates the association of Chinese parents’ collectivistic tendency, attitudes towards filial piety (i.e., children respecting and caring for parents (RCP) and children protecting and upholding honor for parents (PUHP)), parenting behaviors (i.e., autonomy granting (AG) and psychological control (PC)) with young adolescents’ autonomous motivation. Participants were 321 Chinese parents and their eighth-grade children who independently completed a set of surveys. Results showed that parents' collectivistic tendency indirectly and positively contributes to children's autonomous motivation through the mediation of AG and PC, respectively. Parents' attitude toward RCP has an indirect and positive contribution to children's autonomy motivation through the mediation of AG while parents' attitude toward PUHP shows an indirect and negative contribution to children's autonomous motivation through the mediation of PC. The findings suggest that different cultural emphases in collectivist-based societies play different roles in adolescents’ autonomy development. The implications of the findings are discussed.     

Influence of Hostile Media Perception on Willingness to Engage in Discursive Activities: An Examination of Mediating Role of Media Indignation

This study examines the mediating role of media indignation, a set of negative emotional reactions to media coverage perceived to have partisan bias, between hostile media perception (HMP) and its consequences in behavioral willingness, more specifically, willingness to engage in discursive activities. It is examined together with a cognitive pathway through individuals' inference on opinion climate. Data from a web-based survey of university students (N = 696) on three controversial issues were analyzed. Findings showed that the degree of perceived partisan bias in mainstream media coverage on an issue was positively related to the intensity of media indignation and levels of incongruity between one's own opinion and perceived majority opinion. Media indignation in turn had a significant and positive effect on willingness to engage in discursive activities across all three issues, mediating the effect of HMP on behavioral willingness, whereas self-majority opinion incongruity did not. Theoretical implications of the findings are discussed.     

The influence of visual short-term memory on size perception

We show that perceived size of visual stimuli can be altered by matches between the contents of visual short-term memory and stimuli in the scene. Observers were presented with a colour cue (to hold in working memory or to merely identify) and subsequently had to indicate which of the two different-coloured objects presented simultaneously on the screen appeared bigger (or smaller). One of the two objects for size judgements had the same colour as the cue (matching stimulus) and the other did not (mismatching stimulus). Perceived object size was decreased by the reappearance of the recently seen cue, as there were more size judgement errors on trials where the matching stimulus was physically bigger (relative to the mismatching stimulus) than on trials where the matching stimulus was physically smaller. The effect occurred regardless of whether the visual cue was actively maintained in working memory or was merely identified. The effect was unlikely generated by the allocation of attention, because shifting attention to a visual stimulus actually increased its perceived size. The findings suggest that visual short-term memory, whether explicit or implicit, can decrease the perceived size of subsequent visual stimuli.     

中学生同伴交往接受和拒绝的归因研究

本研究参考国外相关量表的设计,结合我国实际,编制了中学生人际归因风格问卷,考察了人际归因风格和人格特征两个维度对中学生在同辈群体中的社会测量地位的影响程度。结果表明,这两者共同影响中学生的社会测量地位,被拒绝学生对正性事件的归因与其他学生存在显著差异,对负性事件的归因不存在显著差异。这提示我们,可以通过改变被拒绝学生不适当的人际归因方式来改善其同伴关系。     

托马斯"实践智慧"及"智德"思想的意义与价值

托马斯(St. Thomas Aquinas,1224/5～1274)作为士林哲学(Philosophia Scholastica;Scholastic Philosophy)的集大成人物,他以前所未有的周详方式与广大篇幅面对并处理prudentia(prudence)课题,肯定它是理智的"明智",更是四枢德的首德-"智德".智德与其它三种枢德(义德、勇德、节德)并举或连用,为伦理德行的"基本德行"(principal virtues).本文拟从四方面阐明托马斯"实践智慧"、"智德"思想的意义与价值.     

关于世界历史体系的几个问题

近年来,从全球史的角度来理解世界历史已经成为史学界学术研究的一种重要方式。同样是对世界历史问题的把握,却出现了许多不同的观点。出于对学术前沿问题的关注,本刊组织了国内学界同仁对1500年以来的世界历史及其相关问题展开讨论,他们通过会议、书信等方式进行交流、沟通,于是便形成了今天这样的笔谈。从总体上看,这一组笔谈有三个方面的特点:一是突出马克思主义史学观的指导意义。无论是对历史形态的把握,还是对历史具体问题的讨论,始终坚持马克思主义的历史思想。二是多元的历史思维方法。对世界历史,尤其是1500年以来充满动荡和冲突的世界历史,坚持从不同的视角、以不同的思维方式和研究方法,而不是以单向思维的方式去认识,对于寻求历史真理来说十分重要。三是平等对话的讨论方式。资深学者和青年学者可以讨论,作者与作者之间可以讨论,作者与学界其他观点可以讨论。在平等的对话中走到学界前沿,寻求对于这一段历史的真理性的认识。     

实验性恶心与呕吐——大脑皮层与内脏相关研究的新途径

大脑皮层与内脏关系的脑机制是揭示心身疾病和心理疾病的重要依据。本文综述了经典条件学习与期待性恶心与呕吐的关系以及实验性恶心与呕吐的研究方法。作者认为,实验性恶心与呕吐结合脑成像技术是研究大脑皮层与内脏关系神经机制的重要途径。