Site preference of refractory elements in γ′-Ni3Al alloyed with Ru

The influence of ruthenium (Ru) on the partitioning behavior of W, Re and Cr in γ′-Ni₃Al has been studied using the Dmol3 method based on the density functional theory. The calculated results show that W, Re and Cr have a preference for the Ni site in γ′-Ni₃Al alloyed with Ru. When Ru substitutes the central Ni atom, the site preference for W, Re and Cr varies. Furthermore, an electronic structure analysis of the alloy in terms of the Mulliken population and partial density of states was performed to elucidate the alloying mechanism of Ru in γ′-Ni₃Al. The results show that the strengthening effect of Ru in the alloy arises from a reduction in the binding energy of Ru as well as p-orbital hybridization between Ru and the host atoms.     

Phase-transformation-induced hardening in Zn–22Al alloys

A phase-transformation-induced hardening effect is reported in Zn–22Al (Al: 22?wt.%) alloys. The Zn–22Al specimens were held at 300?°C for 10?h and then quenched in water. A hardening effect took place in subsequent artificial aging at 100–200?°C, which was accompanied by a phase decomposition of a soft α ₂ phase and a grain coarsening. The phase-transformation-induced hardening affects the hardness more than the grain-coarsening-induced softening, which leads to the age-hardening phenomenon.     

Molecular dynamics simulations of the size effect of titanium single-crystal nanopillars orientated for double prismatic slips

An inverse “smaller is stronger” trend is predicted on the basis of molecular dynamics simulations of α-titanium (Ti) single-crystal nanopillars orientated for double prismatic slips when the nanopillars are less than 7?nm wide. This trend is attributed to a significant increase in the surface energy due to the nucleation and propagation of edge dislocations on the surface of the pillars.     

Family Correlates of Adolescent Self-Monitoring and Social Competence

The purpose of this study was to investigate linkages between adolescent self-monitoring, global social competence, and parenting and family environment dimensions of support and encouragement of autonomy. The sample consisted of 233 young women and 199 young men at 2 southwestern universities. The primary measures used were the Family Environment Scale (R. H. Moos, 1981), the Parent Behavior Form (L. Worell & J. Worell, 1974), the revised Self-Monitoring Scale (M. Snyder, 1987), and the Texas Social Behavior Inventory (R. Helmreich, J. Stapp, & C. Ervin, 1974). Findings indicated that family variables are more strongly associated with social competence than with self-monitoring; family support was, overall, a more important ingredient of social competence than was autonomy. Women and men had different patterns of associations among specific variables.     

The Reciprocal Relations Between Teachers’ Perceptions of Children's Behavior Problems and Teacher–Child Relationships in the First Preschool Year

To examine the reciprocal relations between teacher–child relationships and children's behavior problems, the authors analyzed cross-lagged longitudinal data on teacher–child relationships and children's internalizing and externalizing problems using a structural equation modeling approach. The homeroom teachers of 105 first-year preschoolers aged 2–3 years filled in the Student–Teacher Relationship Scale and the Child Behavior Checklist/2–3, first at 3 months after the children's preschool entrance and then at the end of the first preschool year. Results showed significant cross-wave reciprocal relations between externalizing problems and teacher–child conflict and significant cross-wave relation from early internalizing problems to later teacher–child conflict. However, the cross-wave associations between internalizing and externalizing problems and teacher–child closeness were not significant.     

An individual's work values in career development

This study examined the mediation effect of career decision self‐efficacy in relation to work values and career decision status. The authors surveyed 308 college students about their own intrinsic (e.g., helping others) and extrinsic (e.g., high income) work values and those of significant others, career decision self‐efficacy, and career decision status. The results indicated that the intrinsic and extrinsic work values of significant others were related to the intrinsic and extrinsic work values of the self and that intrinsic work values were more adaptive than extrinsic work values in career development.     

幼儿教师职业承诺与情绪耗竭:情绪劳动的中介作用

以218名幼儿教师为被试,采用问卷调查法,探讨了职业承诺对情绪耗竭的影响,以及情绪劳动在职业承诺对情绪耗竭影响中的中介效应。结果表明:(1)职业承诺与自然行为、深层行为呈显著正相关,而与表层行为、情绪耗竭呈显著负相关。(2)自然行为、深层行为与情绪耗竭均呈显著负相关,而表层行为与情绪耗竭呈显著正相关。(3)深层行为和表层行为在职业承诺与情绪耗竭关系中起部分中介作用,自然行为在职业承诺与情绪耗竭关系间中介效应不显著。     

大学生创业意向与人格关系中创业自我效能感作用的路径模型*

采用大五人格量表、创业意向量表和创业自我效能感量表对2161名在校大学生进行了调查。采用回归分析及结构方程建模等方法,考察大五人格和创业意向之间的关系和创业自我效能感的中介作用。研究发现：（1）大五人格中外向性、宜人性对创业意向有显著的预测作用,神经质、严谨性对创业执行意向有显著的正向预测作用;（2）创业自我效能感对创业意向有显著的正向预测作用,大五人格中外向性、严谨性、宜人性对创业自我效能感有显著的预测作用（3）创业自我效能感在外向性与创业意向之间、宜人性与创业意向之间、严谨性与创业执行意向之间起部分中介作用;创业自我效能感在严谨性与创业目标意向之间起完全中介作用。     

On Generalization： Pragmatists＇ Contributions to Constructivism

Constructivism has been an important program in contemporary philosophy, but cannot itself cannot provide sufficient context for grasping its key points. To fully understand its power and potential we must borrow tools from other programs： specifically, Charles Peirce and John Dewey＇s pragmatism. By exploring these two pragmatists＇ articulations of ＂generalization,＂ which I hold is the most crucial question in constructivism, their prospective contributions to constructivism can be brought to light. If, as I argue, constructivism can incorporate the lessons of pragmatism, then it can still be considered a highly workable interpretation of reality and of human endeavors.