企业家职业倦怠及基于社会责任的消解前因——情商与领导风格的调节作用

以431位中国企业家为调查研究对象,实证中国企业家的职业倦怠现状及群体差异,并基于社会责任视角探索企业家社会责任的消解前因。CSR1对企业家职业倦怠的三个维度(人格解体、情绪衰竭、无效能感)都有显著负向影响,CSR2对人格解体有显著负向影响,CSR3对企业家职业倦怠的三个维度都不具有显著负向影响。变革型领导会加强CSR1对企业家职业倦怠的三个维度以及CSR2对人格解体的消解影响,而交易型领导仅会加强CSR2对人格解体的消解影响,情商会加强CSR1对情绪衰竭、无效能感以及CSR2对人格解体的消解影响。企业家要消解职业倦怠,应主要依赖于CSR1(优势利益相关者责任)的履行,培养和加强变革型领导风格,提升情商水平。     

Numerical simulation on the opto-electro-kinetic patterning for rapid concentration of particles in a microchannel

This paper presents a mathematical model for laser-induced rapid electro-kinetic patterning (REP) to elucidate the mechanism for concentrating particles in a microchannel non-destructively and non-invasively. COMSOL^®(v4.2a) multiphysics software was used to examine the effect of a variety of parameters on the focusing performance of the REP. A mathematical model of the REP was developed based on the AC electrothermal flow (ACET) equations, the dielectrophoresis (DEP) equation, the energy balance equation, the Navier-Stokes equation, and the concentration-distribution equation. The medium was assumed to be a diluted solute, and different electric potentials and laser illumination were applied to the desired place. Gold (Au) electrodes were used at the top and bottom of a microchannel. For model validation, the simulation results were compared with the experimental data. The results revealed the formation of a toroidal microvortex via the ACET effect, which was generated due to laser illumination and joule-heating in the area of interest. In addition, under some conditions, such as the frequency of AC, the DEP velocity, and the particle size, the ACET force enhances and compresses resulting in the concentration of particles. The conditions of the DEP velocity and the ACET velocity are presented in detail with a comparison of the experimental results.     

移动图书馆与微信图书馆的比较研究

文章根据移动图书馆和微信图书馆的问卷调查结果,从研究现状、实现方式、传播方法、服务内容、用户界面、用户交互性、构建成本和稳定性等方面对二者进行比较研究,并就图书馆对移动服务方式的选择提出了建议。     

赋准范空间的准~*自反性

在赋准范空间上定义准*自反的概念,利用凸锥的工具,证明了AX(B*)在赋准范空间单位闭球上是稠密的,从而证明了赋准范空间具有准*自反性质。     

英美现代公民教育的文化转向

公民身份与公民教育之间是相望互动的,从公民身份观念地演化可以透视出公民教育的实践走向.20世纪下半叶以来,文化公民身份观念应运而生,并逐渐在西方众多国家兴起.这牵连出了英美现代公民教育中的诸多文化议题,公民教育实践需要在民族性与全球性、民主性与多样性之间保持适当地张力与整合.在这场“漫长的革命”中,英美现代公民教育正处于文化转向的过程之中.所谓“文化转向”不是一种视文化为全部内容和终极目的的教育形态,而是平等的凸显文化维度在公民教育中的重要地位.     

爱:最神奇的力量

一位大学教授在他的社会学课堂上,让他的学生去巴尔迪摩贫民窟找到两百个男孩的记录,并且要对每个男孩的未来做出评估.学生们给每个孩子的评价都是:“这辈子根本没有机会翻身了.”二十五年后,另外一个社会学教授发现了这个早期做过的社会调查.于是他让自己的学生继续探究这个课题,看看当初那些小男孩现在到底怎么样了.     

The impacts of network centrality and self‐regulation on an e‐learning environment with the support of social network awareness

An e‐learning environment that supports social network awareness (SNA) is a highly effective means of increasing peer interaction and assisting student learning by raising awareness of social and learning contexts of peers. Network centrality profoundly impacts student learning in an SNA‐related e‐learning environment. Additionally, self‐regulation behavior significantly influences online learning of students. However, exactly how network centrality and self‐regulation influence learning behavior and effectiveness in an e‐learning environment remains unclear. Therefore, this study investigates how both variables (ie, network centrality and self‐regulation) impact student learning in an SNA‐related e‐learning environment. Analytical results indicate that the student group with high‐level centrality and low‐level self‐regulation more significantly progresses in learning achievement than the other groups. The second finding shows the group also has the highest number of students asking for help, revealing they have the highest system utilization rate.     

Ten Salient Practices of Undergraduate Research Mentors: A Review of the Literature

This paper identifies salient practices of faculty mentors of undergraduate research (UR) as indicated in the extensive literature of the past two decades on UR. The well-established benefits for students involved in UR are dependent, first and foremost, on high-quality mentoring. Mentorship is a defining feature of UR. As more and different types of colleges and universities strive to meet student demand for authentic scholarly experiences, it is imperative to identify what effective UR mentors do in order to ensure student engagement, quality enhancement, retention, and degree-completion. We offer an original analysis of the literature on UR mentoring in which we identify 10 significant “lessons learned,” or evidence-based practices of effective UR mentors that apply broadly across disciplines, students, institutions, and mentoring approaches.     

How students reason about matter flows and accumulations in complex biological phenomena: An emerging learning progression for mass balance

In recent years, there has been a strong push to transform STEM education at K-12 and collegiate levels to help students learn to think like scientists. One aspect of this transformation involves redesigning instruction and curricula around fundamental scientific ideas that serve as conceptual scaffolds students can use to build cohesive knowledge structures. In this study, we investigated how students use mass balance reasoning as a conceptual scaffold to gain a deeper understanding of how matter moves through biological systems. Our aim was to lay the groundwork for a mass balance learning progression in physiology. We drew on a general models framework from biology and a covariational reasoning framework from math education to interpret students' mass balance ideas. We used a constant comparative method to identify students' reasoning patterns from 73 interviews conducted with undergraduate biology students. We helped validate the reasoning patterns identified with >8000 written responses collected from students at multiple institutions. From our analyses, we identified two related progress variables that describe key elements of students' performances: the first describes how students identify and use matter flows in biology phenomena; the second characterizes how students use net rate-of-change to predict how matter accumulates in, or disperses from, a compartment. We also present a case study of how we used our emerging mass balance learning progression to inform instructional practices to support students' mass balance reasoning. Our progress variables describe one way students engage in three dimensional learning by showing how student performances associated with the practice of mathematical thinking reveal their understanding of the core concept of matter flows as governed by the crosscutting concept of matter conservation. Though our work is situated in physiology, it extends previous work in climate change education and is applicable to other scientific fields, such as physics, engineering, and geochemistry.     

国内外网络舆情数学建模研究综述

互联网技术的发展及网络应用的普及使网络舆情成为当前一个热门的研究领域。众多学者从不同角度运用不同的数学方法对网络舆情进行了研究,取得了大量成果,涌现出大批文献。本文从数学建模的视角对部分国内外网络舆情的研究文献进行归类分析。按照网络舆情中不确定性因素的数学处理方法不同,将网络舆情数学建模的模型主要分为四类。即经典数学模型、随机数学模型、不确定数学模型、其它数学模型。结合现有网络舆情数学建模中存在的问题,本文对网络舆情相关研究的未来发展趋势进行了展望。