高速剪切轴向间隙的研究

本针对剪切下料问题中存在的不足，从裂纹扩展的角度出发，结合断裂力学及塑性力学关于裂纹技术的相关理论，对剪切过程中影响断面质量的一个重要参数一轴向间隙进行分析，得出了高速剪切下合理轴向间隙的表这式。     

Phonological awareness and reading speed deficits in reading disabled Greek‐speaking children

There is evidence that phonological awareness skills secure decoding ability and that phonological deficits underlie failure to acquire adequate word recognition. Slow word‐reading rate may be an additional defining characteristic of reading disability. The present study aimed to investigate whether: (1) reading disabled (RD) Greek‐speaking children showed reading accuracy and reading speed deficits relative to chronological age‐matched controls (CAC) and reading age‐matched controls (RAC); (2) they showed phonological deficits relative to the two control groups who do not present reading difficulties; and (3) they showed reading comprehension deficits over and above any word reading deficits.

Results suggested that the reading accuracy of the RD group was predictably weaker than that of the CAC group but equivalent to that of the RAC group. However, the reading speed of the RD group was significantly slower than the RAC group, who showed the same single word reading speed as the CAC group.

Slow and laboured decoding was found to compromise the reading comprehension of the RD group, whose listening comprehension performance was as good as the two other groups. The RD children performed poorly on phonological awareness tasks and naming speed. Naming speed was not an independent core feature of reading difficulties in the Greek language but was associated with a general phonological deficit.

It is recommended that diagnostic assessments for children with reading difficulties in Greek should include phonological awareness, single word reading and pseudoword reading tasks that measure both accuracy and speed.     

对普通高校短跑训练侧重点的探讨

通过分析世界优秀短跑运动员的百米成绩 ,论述了在短跑训练中应以发展运动员的最高速度作为重点进行突破 ,并从生理学、生物化学及生物力学的角度对其进行了细致地分析 ,对快速提高短跑成绩提出了行之有效的训练方法     

非精英篮球运动员Yo Yo间歇耐力跑和运球Yo Yo跑与最大摄氧量的关系

探讨了非精英男子篮球运动员Yo-Yo间歇耐力跑测试成绩、运球Yo-Yo间歇耐力跑测试成绩的再测信度,以及与最大摄氧量的关系。受试者为31名年龄13—18岁的非精英篮球运动员。结果显示Yo-Yo跑测试速度、运球Yo-Yo跑测试速度的再测信度和典型误分别为ICC=0.76(p=0.012),TE=0.31,ICC=0.90(p=0.000 1),TE=0.23。最大摄氧量与Yo-Yo跑测试速度、运球Yo-Yo跑测试速度相关度分别为r=0.54(p=0.01),r=0.60(p=0.002)。运球Yo-Yo跑速度与Yo-Yo跑速度相关度为r=0.72(p=0.000 1),第二次运球Yo-Yo跑和Yo-Yo跑测试成绩的一致性界限范围是(-2.50,-0.93)。结果说明Yo-Yo跑测试成绩、运球Yo-Yo跑测试成绩1周内进行重测,具有较高的再现性,且Yo-Yo跑测试成绩和运球Yo-Yo跑测试成绩与最大摄氧量都具有中度相关,Yo-Yo跑测试成绩与运球Yo-Yo跑测试成绩高度显著相关。     

“Students Get What Flows Downward”: District Leaders’ Rationalizations of the Standardized Testing of Children

What do students stand to gain from high-stakes, standardized testing? We consider answers to this question from the perspective of urban district leaders tasked with designing and overseeing the implementation of standardized testing policies. Results revealed variation in leaders’ framing of and rationale for standardized testing with respect to benefits for students and whether/why students should strive for high test scores. Implications for both approaches to standardized testing and broader improvement initiatives are discussed.     

运用有效方法 提高练琴效率

20世纪以后的钢琴演奏理论和钢琴教学,日益重视练琴的方式方法,练琴的方法与效率是直接影响演奏质量的问题,文章从把握音乐形象、了解分析作品、慢速练习、分手练习、重点难点练习等几个方面来说明,只有运用合理有效的方法,才能提高练琴效率的有效性。     

现代电源技术实验平台研制

为构建完整的电力电子技术中使用各种电力电子器件进行功率变换的知识体系,研制了现代电源技术综合实验平台,其包括单端隔离型高频开关电源实验、隔离型桥式DC/DC实验和变频调速实验3个实验。对3个实验的核心控制电路进行了详细介绍,并给出对应的工作波形。该实验平台可满足电气工程高年级本科生、研究生实验的要求,同时也可给相关教师提供功率变换的科研平台。     

Impact of Anatomy Boot Camp on Students in a Medical Gross Anatomy Course

Lincoln Memorial University‐DeBusk College of Osteopathic Medicine (LMU‐DCOM) offers an optional three‐week summer Anatomy Boot Camp course (ABC) to facilitate students' transition into medical school and promote retention of anatomy subject matter. The pre‐matriculation program is a supplemental instruction course that utilizes a small group learning format. Boot camp instruction is led by teaching assistants and two anatomy professors. Enrollees gain early exposure to Medical Gross Anatomy (MGA) course subject matter, which is taught in the fall semester, and learn study skills necessary to excel in medical school. No grade is assigned for the course, therefore participants can study without the fear of potentially affecting grades. This study evaluates the effectiveness of the LMU‐DCOM ABC course using data from four consecutive summers. Independent two‐sample t‐tests were used to compare ABC to non‐ABC students for the following variables: incoming grade point average (GPA) and Medical College Admission Test® (MCAT®) scores, MGA written and laboratory practical examination grades, and final MGA course grade. Additionally, a 26‐question survey was administered to 2012–2014 boot camp participants. There were no significant differences in incoming GPA and MCAT scores. However, boot campers scored significantly higher on the first two lecture and laboratory examinations (P < 0.05) for each year of the study. Thereafter scores varied less, suggesting a faster head start for boot camp participants. Mean MGA final grade was on average 3% higher for the boot camp cohort. The survey feedback supports that the ABC course assists with the academic and social transition into medical school. Anat Sci Educ 10: 215–223. © 2016 American Association of Anatomists.     

The Possibilities of Historical Research

ABSTRACT

The authors outline results of 3 studies conducted to examine the structure of disciplinary knowledge from reading measured through proximity data. In Study 1, 168 third-grade students were asked to read a science text and rate the relationships of keywords from the passage. From these ratings, comprehension scores were calculated that related well to a free-recall measure of science reading comprehension and differentiated poor and proficient readers. In Study 2, 176 third-grade students were given the proximity data measure on science text along with measures of prior knowledge, questioning, and text searching. In Study 3, 160 ninth-grade students were given the proximity data measure after reading a social studies text that varied on the presence of text signals and familiarity. The findings of this study extend the literature on the cognitive processing that contributes to higher order comprehension of information text among elementary and secondary students.     

梧桐隧道破碎层施工技术

梧桐隧道位于镇宁至镇境关高速公路第十五合同段,全长1270m,为双洞单向行驶隧道,是本合同段的控制工程,而该隧道进口段240m长处在断层破碎带内,成为该隧道的重中之重,难中之难的攻坚地段。