Electronic in-class course evaluations and future directions

This study sought to determine whether an evaluator conducting electronic course evaluations in person in a classroom increased response rates. At a large public university in the United States, course evaluations were being conducted electronically, attaining a response rate of <50% over several semesters. At the end of the Spring 2015 at this university, an evaluator entered several classrooms having a total enrollment of 273 students and guided students through the process of completing course evaluations using their mobile devices. A response rate of 78.4% was achieved. The process described in this study provides evidence that response rates can be increased in similar circumstances. In addition, several ways the technology described could be used in the future for course evaluation are discussed.     

PLC程序执行时序对控制结果的影响

可编程序逻辑控制器PLC是一种基于软件和硬件控制的工业现场计算机控制系统。在了解生产工艺和控制要求的基础上,设计系统程序时必须充分考虑到硬件的特性,编制出与硬件协调配合的程序,合理分配PLC软件程序执行时序,使控制系统能精确、稳定、快速工作。反之,则会出现一些意外故障,造成控制系统误动作。通过PLC控制电梯的部分梯形图...     

竞赛特质焦虑干扰优势反应抑制的神经准备过程:ERP的证据

竞赛焦虑对操作表现的影响是运动心理学的重要研究领域,注意控制理论对二者关系从执行功能的角度进行了新的阐释,认为焦虑干扰执 行功能中的抑制功能。近年来,运动心理学对抑制功能探讨较多,对优势反应和任务无关刺激的抑制是抑制功能的2个重要成分,但以往研究大多 集中于抑制无关刺激,对优势反应抑制的探讨相对欠缺,而后者却是竞技场上运动员时常需要面对的问题。已有行为学研究发现,竞赛特质焦虑对 优势反应抑制功能有干扰效应,但其神经机理尚待探讨。本研究采用ERP技术探讨竞赛特质焦虑干扰优势反应抑制的神经基础,假设竞赛特质焦 虑干扰前脑区域（额区和中央区）优势反应抑制的神经准备过程。招募26名研究参与者,根据《赛前情绪量表32×6》测试得分,二分法划分竞赛特质 焦虑高分组和低分组。2组均完成代表优势反应抑制功能的反向眼跳任务,分析抑制“线索”出现前-100~0 ms时程的ERP成分,发现反向眼跳的准 备期在额区和中央区诱发出一负成分,竞赛特质焦虑高分组的波幅小于低分组。以上结果部分支持了假设,竞赛特质焦虑对优势反应抑制的神经 准备期有干扰效应,且主要由前脑区域控制,此结果为注意控制理论在竞赛焦虑领域的适用性提供了神经生理学的部分证据。     

The effect of issue obtrusiveness,issue congruence,and response strategies on the acceptance of crisis communication messages

Based on issue ownership theory, this study identifies the effects of issue obtrusiveness, issue congruence, and crisis response strategies on the level of acceptance of crisis communication messages employing 2 × 2 × 3 (issue obtrusiveness × issue congruence × response strategies: scapegoat, justification, reminder) experimental research. Two large Korean business groups (Hyundai and SK) were selected. There was a main effect in crisis response strategies and a three-way interaction effect. A crisis communication message was effective when a corporation owns congruent and unobtrusive issues. Implications for public relations research and practices were discussed.     

普通学校中学生特殊教育需要响应:以英国为例

采用渐进型响应模式来满足普通学校中学生的不同特殊教育需要,是英国在普通学校实践全纳教育过程中所采用的一种方法,这种模式要求各学校和教师根据学生特殊教育需要程度的不同分五阶段进行响应,为学生提供不同水平的支持,以便及时帮助学生解决学习困难,提高其教育质量。     

随机经济周期模型的动力学研究

在文献[1]给出的动态经济周期模型的基础上,研究当O＊（t）（白发投资与自发消费的总和）为随机外力干扰的随机函数时对经济的影响,应用多尺度法及文献[7]求出了一阶近似解及系统的稳态响应,并分析了参数和随机激励的幅值对经济系统的影响．讨论了非零解的稳定性以及非零解稳定的充要条件,得出当随机激励的带宽γ较小时,系统仍会出现多值现象．     

Effect of pile-cap connection on behavior of torsionally loaded pile groups

To evaluate the responses of fixed and pinned pile groups under torsion, a method is presented to analyze the nonlinear behavior of free-standing pile groups with rigid pile caps. The method is capable of simulating the nonlinear soil response in the near field usingp-y and r-θ curves, the far-field interactions through Mindlin＇s and Randolph＇s elastic solutions, and the coupling effect of lateral resistance on torsional resistance of the individual piles using an empirical factor. Based on comparisons of the solutions for fixed- and pinned-head, 1×2, 2×2, and 3×3 pile groups subjected to torsion, it was found that pile-cap connection significantly influences the torsional capacity of pile groups and the assignment of applied torques in the pile groups. In this study, the applied torques for the pinned-head pile groups are only 44%-64% of those for the corresponding fixed-head pile groups at a twist angle of 2^o. Such a difference is mainly due to the change of the lateral resistances of individual piles in the groups.     

Schedulability analysis for linear transactions under fixed priority hybrid scheduling

In hard real-time systems, schedulability analysis is not only one of the important means of guaranteeing the timelines of embedded software but also one of the fundamental theories of applying other new techniques, such as energy savings and fault tolerance. However, most of the existing schedulability analysis methods assume that schedulers use preemptive scheduling or non-preemptive scheduling. In this paper, we present a schedulability analysis method, i.e., the worst-case hybrid scheduling （WCHS） algorithm, which considers the influence of release jitters of transactions and extends schedulability analysis theory to timing analysis of linear transactions under fixed priority hybrid scheduling. To the best of our knowledge, this method is the first one on timing analysis of linear transactions under hybrid scheduling. An example is employed to demonstrate the use of this method. Experiments show that this method has lower computational complexity while keeping correctness, and that hybrid scheduling has little influence on the average worst-case response time （WCRT）, but a negative impact on the schedulability of systems.     

Teachers’ self-reported knowledge regarding English learners: perspectives on culturally and linguistically inclusive instruction and intervention

Student diversity within U.S. schools has steadily increased in recent years. This trend has driven significant interest, on the part of schools and school systems, in supporting students who are English learners (ELs) and who are culturally diverse. It has also highlighted, for those schools and school systems, the importance of professional development to prepare teachers to support those students effectively. Teacher experience and knowledge regarding this population is particularly important to the cause of inclusive education, as appropriate supports, instruction and inclusion for these learners are highly dependent on teachers’ knowledge and skills. This study surveyed teachers in three highly diverse elementary schools with high percentages of ELs, students of minority backgrounds, and students receiving free and reduced-price meals. Results indicated that, despite reporting significant previous professional development on cultural and language diversity, teachers lacked familiarity with basic concepts related to cultural and language diversity and to factors considered in the interventions process for diverse learners. These findings, if replicated, may call into question the efficacy of ongoing professional development efforts and underscore the need for more consistent design, delivery, and evaluation of professional development initiatives or programmes.     

Multivariate adaptive regression splines based simulation optimization using move-limit strategy

This paper makes an approach to the approximate optimum in structural design, which combines the global response surface (GRS) based multivariate adaptive regression splines (MARS) with Move-Limit strategy (MLS). MARS is an adaptive regression process, which fits in with the multidimensional problems. It adopts a modified recursive partitioning strategy to simplify high-dimensional problems into smaller highly accurate models. MLS for moving and resizing the search sub-regions is employed in the space of design variables. The quality of the approximation functions and the convergence history of the optimization process are reflected in MLS. The disadvantages of the conventional response surface method (RSM) have been avoided, specifically, highly nonlinear high-dimensional problems. The GRS/MARS with MLS is applied to a high-dimensional test function and an engineering problem to demonstrate its feasibility and convergence, and compared with quadratic response surface (QRS) models in terms of computational efficiency and accuracy.