Equivalent and effective strains during severe plastic deformation (SPD)

ABSTRACT

This paper considers the characteristics of severe plastic deformation (SPD) to estimate its efficacy and to compare different processing techniques. In contrast to effective strains by von Mises and Hencky, the rotation component of the strain rate is included in the analysis as a mode of deformation, which ranges from simple shear to pure shear. Distortions of material elements during a uniform plane plastic flow are calculated using a kinematic approach. For the fixed deformation mode, the current state is defined by the accumulated shears that are identical to the von Mises effective shear strains. In specific cases of pure shear and simple shear, the accumulated shears match the specific distortions of round or square elements prescribed by Hencky or von Mises approach, respectively. The mode of deformation is important to the structural effects of SPD. In general, two separated characteristics, accumulated shear and the coefficient of deformation mode, are necessary to describe strains during SPD.     

Using a Self-Management Intervention to Increase Compliance in Children With ASD

This two-study series examined the effectiveness of self-management in increase compliance with parental requests. Three boys diagnosed with Autism Spectrum Disorder and their parents participated. The intervention involved self-monitoring combined with parent-delivered reinforcement. A multiple baseline design was used. The intervention was successful in increasing rates of compliance and reducing problem behavior in training and generalization settings with each participant. Social validity was high and treatment integrity data indicated that the intervention could be readily implemented by parents. Study 2 also provided evidence of a strong treatment effect for the self-management beyond a small effect for effective instructional delivery.     

早孕期诊断及其相关问题分析

早孕期诊断是早期诊断的一部分。将新方法应用于早孕期诊断时,应考虑其成本效益问题。早孕期咨询应注意孕妇的年龄特征、个体化诊断和社会伦理学问题,正确诠释诊断结果,让孕妇及其配偶共同参与诊断。     

The Effects of Using Response Cards on Student Participation, Academic Achievement, and On-Task Behavior During Whole-Class, Math Instruction

This study evaluated the effects of using response cards during whole-group math instruction in a fourth-grade classroom, using an ABA research design. During both A and B conditions the classroom teacher conducted her math lessons as planned. However during the A conditions, hand-raising (HR) was in effect. That is, when the teacher asked a question she instructed the students to raise their hands and after each question she called on one student whose hand was raised. During the B condition, response cards (RC) were in effect. Whenever she asked a question, the teacher instructed the entire class to write their answers on individual response cards. After each question, the teacher instructed the entire class to hold up their RC. Data were collected on five students who represented the class range in general level of participation, academic skills, and on-task behavior. Results indicated that student participation, specifically the number of student-initiated opportunities to respond and the number of student responses were higher when using RC than when HR was in effect. Students scored higher on the weekly math quiz after the RC condition than after the HR conditions. The percentage of intervals that students were on-task also was higher when RC were used.     

Notes on selective influence, probabilistic causality, and probabilistic dimensionality

The paper provides conceptual clarifications for the issues related to the dependence of jointly distributed systems of random entities on external factors. This includes the theory of selective influence as proposed in Dzhafarov [(2003a). Selective influence through conditional independence. Psychometrika, 68, 7-26] and generalized versions of the notions of probabilistic causality [Suppes, P., & Zanotti, M. (1981). When are probabilistic explanations possible? Synthese, 48, 191-199] and dimensionality in the latent variable models [Levine, M. V. (2003). Dimension in latent variable models. Journal of Mathematical Psychology, 47, 450-466]. One of the basic observations is that any system of random entities whose joint distribution depends on a factor set can be represented by functions of two arguments: a single factor-independent source of randomness and the factor set itself. In the case of random variables (i.e., real-valued random entities endowed with Borel sigma-algebras) the single source of randomness can be chosen to be any random variable with a continuous distribution (e.g., uniformly distributed between 0 and 1).     

正、负性情绪的跨文化心理测量:PANAS维度结构检验

对中国大学生(N=201)和美国大学生(N=321)进行PANAS测评,以检验该量表中、英文版的因素效度。探索性因素分析会聚性地验证了该量表的PA和NA两维度结构具有跨文化一致性,中、英文量表两因子的累积方差贡献率分别为51.31％和44．25％,接近Watson等的研究结果。然而研究结果也显示测项偏差问题,因此中文量表的PA分量表的测项组成不等同于原量表。中、英文量表的PA与NA分量表同样具有较高内在一致性信度,表明其符合心理测量学要求。     

有限成分论和多成分论的辨析——中药药效成分争论的焦点

辩证地分析了关于中药药效成分争论的焦点问题———有限成分论和多成分论,以及产生的根源,讨论了中药药效成分研究的方法和思路,并倡导实事求是的科研精神。     

从青少年学生的评价看教师的人格结构

本研究以班为单位,要求1594名大、中、小学生采用《青少年学生评价教师人格特质形容词捡核表》对自己理想中的教师人格特质进行评定,结果显示学生们对教师人格特质的评价维度是：高尚／进取、慈爱/公正、客观／求真、外向／开朗、退缩/粗暴、内向／怪异、损人俐己,前四个维度是学生们喜欢的,后三个维度是学生们不喜欢的。学生们对教师人格的评价存在着年龄、性别和学科上的差异。     

想象、再现与重复--德里达对胡塞尔关于实在话语与想象话语之区分的解构及其意义

本文主要讨论了德里达对胡塞尔在《逻辑研究》中所作的关于“真实话语”与“想象话语”之区分的解构。在德里达看来,无论是真实话语还是想象话语,首先都是一种“本源的重复结构”。这种本源的重复比真实话语与想象话语的区分更古老,它是一切话语乃至一切符号的“共根”。本文详细梳理了德里达的解构过程和解构策略,并指出这种解构的最终目的是为了解构传统形而上学所确立的本原与替补的差异体系,由此揭示了这种解构对于西方形而上学的意义。