Screening alloy electrocatalysts by combining magnetron sputtering and scanning electrochemical microscopy

A high-throughput approach for developing materials is revolutionizing the current trial-and-error mode with great potential for accelerating the process. Here, we propose a simple approach combining multitarget sputtering and scanning electrochemical microscopy for the screening of hydrogen evolution reaction (HER) electrocatalysts. The ternary Co–Ni–Cu system is used as to demonstrate the feasibility of the strategy. The optimized composition for a HER catalyst is determined to be Co₁₄Ni₅₃Cu₃₃.     

Dislocations in Bi-Pb-Sr-Ca-Cu-O superconductors

Abstract

Dislocations and dislocation networks in superconducting Bi-Pb-Sr-Ca-Cu-O have been observed by means of TEM, confirming that this compound is a layer structure with low stacking fault energy. On the basal plane, dislocations and dislocation networks dissociate into partial dislocations and partial dislocation networks. However, the dissociation of [010] dislocations is hardly observed, which is related to the structural characteristics of the compound.     

Green's functions of magnetoelectroelastic solids with a half-plane boundary or bimaterial interface

Green's functions for magnetoelectroelastic medium with an arbitrarily oriented half-plane or bimaterial interface are presented in this paper. The derivation is based on an extended Stroh's formalism and coordinate-transform technique. In particular, a new coordinate variable is introduced to handle vertical or other boundary problems. These Green's functions satisfy related boundary or interface conditions. The Green's functions obtained can be used to establish boundary-element formulation and to analyse fracture behaviour involving half-plane boundaries or bimaterial interfaces.     

Los procesos de atribución causal

RESUMEN

El interés por los procesos de atribución, por las explicaciones -razones- que las personas dan para su conducta y la de los demás, es una de las características más sobresalientes de los modelos recientes en la Psicología Social. Heider, hace veinticinco años, ya se había fijado en la gran significación de los procesos de atribución causal en las relaciones interpersonales, pero hasta hace bastantes años después no se recogieron los frutos de aquel interés señalado por Heider. En este trabajo se realiza una revisión de diversos modelos de atribución y se señala, desde una posición crítica, algunas de sus inconsistencias.     

评价中心的构想效度谜题:测量维度还是活动?

评价中心是一种高保真度的情境模拟,它被设计用来在多种与工作相关的活动中测量多项维度.30年来的大量研究发现,评价中心具备良好的内容效度和效标关联效度,但构想效度却始终不理想,评价中心评分反映的总是由活动而非预先设想的维度带来的效应.这一评价中心“构想效度谜题”吸引了大量研究关注,并逐步形成了维度中心取向、活动中心取向及交互作用取向三种主要观点,分别主张控制各种误差因素以改善维度测量、放弃维度而转向活动或任务以及关注维度与活动的共同作用.未来研究应在传统的维度中心取向之外给予活动中心取向足够重视,并重点发展交互作用取向.     

双言舌尖现象的产生机制：来自粤语-普通话双言者的证据

舌尖现象(Tip-of-the-Tongue phenomenon, TOT)是言语产生中的一种常见现象。国外研究发现, 双语者和单语者的舌尖现象差异很大。双言和双语既相似, 又存在差异。以粤语–普通话双言者为被试, 比较了普通话熟练和不熟练的被试在使用不同语言命名时的TOT产生率。结果发现：(1)粤语–普通话双言者的TOT率受普通话熟练程度影响。普通话不熟练的粤语–普通话双言者用普通话命名时产生更高的TOT率。(2)语言启动能够调节粤语–普通话双言者的普通话熟练程度与TOT产生的关系。在语言启动条件下, 普通话熟练的粤语–普通话双言者的TOT率更高。(3)粤语–普通话双言者的TOT产生机制符合部分激活理论的预言。     

Barriers to Treatment in an Ethnically Diverse Sample of Families Enrolled in a Community-Based Domestic Violence Intervention

Using quantitative and qualitative data, we examined the association between barriers to treatment, motivating factors, treatment attendance, and outcome in a sample of 63 mothers (most of Asian or Pacific Islander descent) enrolled in a family-based domestic violence treatment program. A high number of perceived barriers was associated with lower attendance and lower scores on assessment of parenting practices at posttreatment. Mothers reported relying on their own motivation, observations of children's improvement, and the quality of their relationships with staff and group members to overcome barriers. A larger number of motivating factors was associated with positive parenting practices at posttreatment. Discussion includes the benefits of a mixed-method approach to measuring barriers and its clinical application to increase treatment participation.     

Laypeople do use sample variance: The effect of embedding data in a variance-implying story

When using sample data to decide whether two populations differ, laypeople attend to the difference between group means, but largely overlook within-group variability (Obrecht, Chapman, & Gelman, 2007 Obrecht, N. A., Chapman, G. B. and Gelman, R. 2007. Intuitive t-tests: Lay use of statistical information. Psychonomic Bulletin & Review, 14: 1147–1152.  [Google Scholar]). We show, first, that laypeople know about and use story-implied variability when making pairwise comparisons. Then we demonstrate that participants’ sensitivity to variance in a dataset is boosted when presented in a context that implies consistent variance information. Statistical data were couched in stories about electrical conductivity measurements obtained from element samples (low-variability category) or body weight measurements from samples of peoples (high-variability category). We manipulated, between participants, whether the data variance matched or mismatched the story-implied variability. Participants who received data in a matching context showed high sensitivity to variance, while those in the mismatching condition did not. Laypeople use statistical data to make reasonable inferences when those data are provided in a context that makes sense.     

Pictorial superiority effects in oldest-old people

We examined memory for pictures and words in middle-age (45–59 years), young-old (60–74 years), old-old (75–89 years), and the oldest-old adults (90–97 years) in the Louisiana Healthy Aging Study. Stimulus items were presented and retention was tested in a blocked order where half of the participants studied 16 simple line drawings and the other half studied matching words during acquisition. Free recall and recognition followed. In the next acquisition/test block a new set of items was used where the stimulus format was changed relative to the first block. Results yielded pictorial superiority effects in both retention measures for all age groups. Follow-up analyses of clustering in free recall revealed that a greater number of categories were accessed (which reflects participants’ retrieval plan) and more items were recalled per category (which reflects participants’ encoding strategy) when pictures served as stimuli compared to words. Cognitive status and working memory span were correlated with picture and word recall. Regression analyses confirmed that these individual difference variables accounted for significant age-related variance in recall. These data strongly suggest that the oldest-old can utilise nonverbal memory codes to support long-term retention as effectively as do younger adults.