Formation of omega and Ti2Ni phases in a residual Ti–Ni–Ti multilayer between stainless steel and zirconia after bonding at 1173 K

Stainless steel (316L) and 8 mol pct Y₂O₃-stabilized zirconia (8Y-ZrO₂) were bonded using a Ti–Ni–Ti multilayer at 1173 K (900 °C) for 1 h. Cross-sectional transmission electron microscopy specimens were prepared by an innovative focused ion beam plus lift-out technique. In addition to acicular α-Ti, the dissolution of Fe, Cr, and Ni diffusing outwards from 316L into β-Ti led to the precipitation of the omega (ω) phase with different variants in the residual Ti foil between 316L and Ni. The ω-phase was not found in the residual Ti foil between Ni and 8Y-ZrO₂, while Ti₂Ni precipitates were precipitated in some α-Ti grains owing to the exclusion of Ni from the β-Ti.     

A novel method for measurement of electronic work function of micro/nanostructure materials using a Kelvin probe system

Work function (WF) can be measured using the Kelvin probe (KP) technique to characterize surface behavior of micro/nanostructures grown on substrates such as metals or semiconductors. However, for such micro/nanostructures, substrates with different WF can strongly affect the measurements if they are exposed directly to face the Kevin probe tip. In this article, a model is proposed to investigate the WF of sparse ZnO nanorods grown on an Si substrate. It is demonstrated that theoretical results from the model are consistent with experimental observations performed using a KP system.     

Effect of electron concentration on the Laves phase stability of NbCr2–Ni produced by powder metallurgy

The powder metallurgy technology of mechanical alloying followed by hot-pressing consolidation has been used to obtain NbCr₂–Ni Laves phases. High-purity Nb, Cr, and Ni crystalline powders were milled for periods up to 35 h. These powders were vacuum sintered at 1250°C for 0.5 h under 45 MPa. The phase transformations of NbCr₂–Ni Laves phases have been investigated by X-ray diffraction. The grain size decreases and the microstrain increases with increased Ni content. Different phase transformations were observed from NbCr₂–Ni intermetallics. It is found that the electron concentration and phase stability correlation is obeyed in the Nb–Cr–Ni systems. However, the electron concentration corresponding to the C15/C14 phase transition is found to move to a higher value (i.e. 6.103) than the predicted one (i.e. 5.88) in the literature.     

The kinetic limit of superheating induced by semicoherent interfaces

The superheating behaviour of embedded particles induced by semicoherent interfaces has been observed in many circumstances. In this paper, a phenomeno‐ logical model for melt nucleation on misfit dislocations at a semicoherent interface is proposed. A kinetic limit for semicoherent-interface-induced superheating, which is in good agreement with the results of experiments and computer simulations, is derived from this model. Calculations and analyses based on the model reveal that melting prefers to initiate at the semicoherent interface and that superheating of embedded particles is possible for a melt nucleation contact angle less than 90°. Among the matrix-dependent parameters, the contact angle and the shear modulus of the matrix are found to be dominant in determining the superheating of embedded particles.     

国外儿童关系性攻击影响因素及测量方法新进展

关系性攻击是对他人人际关系的攻击。儿童关系性攻击受到很多因素的影响,其中主要包括父母的教养方式、同胞、同伴和媒体等。由于儿童关系性攻击具有隐蔽性的特点,所以儿童关系性攻击的测量方法主要包括社会测量评价、教师评定和自我报告等,每种方法都具有各自的优点和缺点,多种方法联合使用会更准确。     

人文关怀在消除IVF—ET患者心理压力中的作用

近年我国不少生殖医学中心在如何提高体外受精一胚胎移植（IVF—ET）治疗成功率问题上,都将注意力集中在临床用药的研究、控制性超促排卵方案的改进以及实验室条件的改善上,大多忽视IVF—ET患者心理方面的治疗。有研究表明：IVF—ET治疗的成功,不仅与患者自身的病理及生理状况有关,更与患者在治疗过程中产生的心理压力有关。因此,建议医护人员在给不孕症患者实施IVF-ET助孕治疗的全过程中,应给予患者更多人文关怀,这样不仅能够减少IVF—ET患者心理健康问题的发生,而且可以改善患者的身心状态和应对治疗能力,从而提高IVF—ET治疗成功率。     

示中环指指尖缺损的鱼际皮瓣修复

探讨应用鱼际皮瓣修复示中环指指尖缺损的方法和效果.自2010年8月～2013年3月,应用鱼际皮瓣修复示中环指指尖缺损28例,术后评价皮瓣外观及供区愈合情况.结果术后28例皮瓣全部存活,随访时间为2个月～8个月.患指指尖皮瓣质地柔软,外形饱满,颜色与周围一致,指端无压痛,供区直接缝合,未发现刀口疲痕挛缩影响拇指及虎口功能.鱼际皮瓣修复示中环指指尖缺损手术操作简单,修复后患指指尖外观满意、供区损伤小.患者顺从性好,易于为临床医生所接受.     

The Moderating Role of English Proficiency in the Association Between Immigrant Chinese Mothers' Authoritative Parenting and Children's Outcomes

The authors' objective was to investigate the association between Chinese immigrant mothers' authoritative parenting and their children's socioemotional and behavioral difficulties. Participants were 136 first-generation Chinese immigrant mothers with 3–5-year-old children residing in the United States. Authoritative parenting was associated with lower socioemotional and behavioral difficulties in children as reported by preschool teachers. Further moderation analyses revealed that immigrant mothers' English proficiency moderated the association between authoritative parenting and children's difficulties. Specifically, authoritative parenting was significantly associated with fewer total difficulties only for children with mothers who reported higher English proficiency.     

Cooperativeness and competitiveness as two distinct constructs: Validating the Cooperative and Competitive Personality Scale in a social dilemma context

The present research validated the construct and criterion validities of the Cooperative and Competitive Personality Scale (CCPS) in a social dilemma context. The results from three studies supported the notion that cooperativeness and competitiveness are two independent dimensions, challenging the traditional view that they are two ends of a single continuum. First, confirmatory factor analyses revealed that a two‐factor structure fit the data significantly better than a one‐factor structure. Moreover, cooperativeness and competitiveness were either not significantly correlated (Studies 1 and 3) or only moderately positively correlated (Study 2). Second, cooperativeness and competitiveness were differentially associated with Schwartz's Personal Values. These results further supported the idea that cooperativeness and competitiveness are two distinct constructs. Specifically, the individuals who were highly cooperative emphasized self‐transcendent values (i.e., universalism and benevolence) more, whereas the individuals who were highly competitive emphasized self‐enhancement values (i.e., power and achievement) more. Finally, the CCPS, which adheres to the trait perspective of personality, was found to be a useful supplement to more prevalent social motive measures (i.e., social value orientation) in predicting cooperative behaviors. Specifically, in Study 2, when social value orientation was controlled for, the CCPS significantly predicted cooperative behaviors in a public goods dilemma (individuals who score higher on cooperativeness scale contributed more to the public goods). In Study 3, when social value orientation was controlled for, the CCPS significantly predicted cooperative behaviors in commons dilemmas (individuals who score higher on cooperativeness scale requested fewer resources from the common resource pool). The practical implications of the CCPS in conflict resolution, as well as in recruitment and selection settings, are discussed.