Facilitating learning in large lecture classes: testing the "teaching team" approach to peer learning

We tested the effect of voluntary peer-facilitated study groups on student learning in large introductory biology lecture classes. The peer facilitators (preceptors) were trained as part of a Teaching Team (faculty, graduate assistants, and preceptors) by faculty and Learning Center staff. Each preceptor offered one weekly study group to all students in the class. All individual study groups were similar in that they applied active-learning strategies to the class material, but they differed in the actual topics or questions discussed, which were chosen by the individual study groups. Study group participation was correlated with reduced failing grades and course dropout rates in both semesters, and participants scored better on the final exam and earned higher course grades than nonparticipants. In the spring semester the higher scores were clearly due to a significant study group effect beyond ability (grade point average). In contrast, the fall study groups had a small but nonsignificant effect after accounting for student ability. We discuss the differences between the two semesters and offer suggestions on how to implement teaching teams to optimize learning outcomes, including student feedback on study groups.     

Evaluating students’ perceptions and attitudes toward computer-mediated project-based learning environment: A case study

This research investigated 68 secondary school students’ perceptions of their computer-mediated project-based learning environment and their attitudes towards Project Work (PW) using two instruments—Project Work Classroom Learning Environment Questionnaire (PWCLEQ) and Project Work Related Attitudes Instrument (PWRAI). In this project-based learning environment, students experienced a face-to-face classroom setting and e-learning by using a synchronous computer-mediated communication (CMC) tool called ‘iCollaborate’ for online communication and project collaboration with peers from other countries. The PWCLEQ and PWRAI instruments were used to evaluate the computer-mediated project-based learning environment using students’ perceptions of the learning environment and to further investigate how their perceptions might affect their attitudes towards PW lessons. Students perceived the computer-mediated project-based learning environment favourably but they preferred to experience more Material Environment and more Open-Endedness and Social Presence. Simple correlation analysis revealed that all environment dimensions were significantly and positively related to the students’ attitudes towards PW, while multiple regression analysis indicated that two scales, Instructor Support and Social Presence, were the strongest predictors of attitudes towards PW lessons.     

不为技巧不失技巧——黄安伦《g小调钢琴协奏曲》的创作风格

黄安伦是当代华人新音乐的代表人物,其作品《g小调第一钢琴协奏曲》将浓郁的中国民族情结与典型的西方传统协奏曲结构形式融为一体,构思宏达,技巧娴熟,风格质朴。这一创作风格虽不为技巧,但不失技巧,既展现了作品形神兼备的特殊魅力,又表达了作者独特的审美视角及对故土、对民族、对人类的永恒之爱。     

职业态度与职业能力关系之辨——基于结构功能主义理论的分析

职业态度与职业能力是二者互补共济与良性互动的关系,二者同时作为必不可少的从业要素,职业态度是职业能力提升的助推器,职业能力是职业态度转变的能量阀.职业态度与职业能力各有所用、各有所长,二者都应相济相成,同时并重.顾此失彼,重此薄彼,都会造成个体从业受挫和制约职业健康发展.     

An accurate estimation of the horizontal acceleration of a rower’s centre of mass using inertial sensors: a validation

For a valid determination of a rower’s mechanical power output, the anterior–posterior (AP) acceleration of a rower’s centre of mass (CoM) is required. The current study was designed to evaluate the accuracy of the determination of this acceleration using a full-body inertial measurement units (IMUs) suit in combination with a mass distribution model. Three methods were evaluated. In the first two methods, IMU data were combined with either a subject-specific mass distribution or a standard mass distribution model for athletes. In the third method, a rower’s AP CoM acceleration was estimated using a single IMU placed at the pelvis.

Experienced rowers rowed on an ergometer that was placed on two force plates, while wearing a full-body IMUs suit. Correspondence values between AP CoM acceleration based on IMU data (the three methods) and AP CoM acceleration obtained from force plate data (reference) were calculated. Good correspondence was found between the reference AP CoM acceleration and the AP CoM accelerations determined using IMU data in combination with the subject-specific mass model and the standard mass model (intraclass correlation coefficients [ICC] >?0.988 and normalized root mean square errors [nRMSE]?3.81%). Correspondence was lower for the AP CoM accelerations determined using a single pelvis IMU (0.877?Based on these results, we recommend determining a rower’s AP CoM acceleration using IMUs in combination with the standard mass model. Finally, we conclude that accurate determination of a rower’s AP CoM acceleration is not possible on the basis of the pelvis acceleration only.     

我国农民体育消费的现状与对策研究

体育消费已成为我国拉动内需、活跃市场、繁荣经济、拓宽就业渠道的一支坚挺力量。研究约占全国人口总数70%农民的体育消费状况将对我国整体经济发展和社会主义新农村建设有着重要的划时代的历史意义。通过对我国发达与欠发达地区农民体育消费现状进行了调查和分析,并提出对策与建议,旨在落实＂农民体育健身工程＂,推动农村体育市场的建立与发展,改变农民的消费意识,拉动新农村经济的增长,促进社会主义新农村建设。     

河池学院校园鸟类初步调查

2008年7月至2009年7月,采用样线调查和随机观察的方法对河池学院校园的鸟类进行了初步调查。在这次调查中,共记录到鸟类101种,隶属于12目32科。其中留鸟54种,夏候鸟10种,冬候鸟26种,旅鸟11种。校园鸟类以食虫鸟类为主,达64种,约占鸟类种数的63.4%;食果鸟类16种,约占鸟类种数的15.9%。在4种生境类型中,在残留林活动的鸟类种数最多,达62种,约占校园鸟类种数的61.4%。在水域中活动的鸟类仅18种,约占校园鸟类种数的17.8%。同时,也对校园鸟类的保护提出建议。     

BTLA与类风湿性关节炎的研究进展

类风湿关节炎（Rheumatoid Arthritis,RA）是以对称性多关节滑膜炎为主要临床症状的自身免疫性疾病,呈慢性、进行性、迁延性.大多数病人有永久性骨破坏,并可出现关节外损害,如脏器和神经系统受累,若无恰当治疗,则最终形成终生残疾甚至危及生命.RA在我国的发病率约为0.36%,是严重危害人类健康的疾病之一.当前,RA的临床治疗仍以非甾体抗炎药物和慢作用抗风湿药物为主,糖皮质激素和细胞毒免疫抑制剂也较为常用.这些药物均有一定疗效,但由于毒副反应较大,病人难以长期服用[1].因此,急需新的特异性作用靶点或新的干预手段来对RA患者进行治疗.     

BD-2/GPS组合导航系统选星算法及定位分析

为解决组合导航系统定位精度与快速定位之间的矛盾,提出一种新的选星算法.该方法将可见卫星仰角与遗传算法相结合,以几何精度因子(GDOP)计算模型作为遗传算法中判断解优劣的适应度函数,从而达到快速定位的效果.将应用该方法所得的GDOP和算法运行时间与应用最佳GDOP算法计算所得的相应结果进行对比,发现采用该方法得到的GDOP接近最优值,而且选星算法计算时间减少.实验数据分析证明该方法在实时性和可行性方面的优越性.     

浅谈建设工程合同前期管理及人的重要性

我国从社会主义计划经济缓慢转变为市场经济,从某一方面说,也意味着向合同经济的转变。在建筑业中,合同管理即核心。建设工程合同是双方履行义务,享有权利的法律基础。建筑企业想要谋取更多的利润,规避更多的风险,就应该重视合同前期的管理及管理型技术人才的培养,通过管理能力的提升来减少争议和纠纷,从而降低成本。