Interactive response system (IRS) for college students: individual versus cooperative learning

In this study, the researcher aimed to understand how students learned the targeted knowledge with an interactive response system (IRS) tool, and whether learners in two different learning modes: individual and group use of IRS, differed in their learning performance and knowledge retention after the IRS activity. These two kinds of IRS interaction were integrated into the course which included multiple choice questions for testing memorable knowledge and open-ended questions for enhancing organization and critical thinking ability via a methodology that involved 120 college students and included the analysis of tests, survey questionnaires and a course learning diary. Overall, the results were consistent with the consensus that students perceive the IRS as a positive addition to their classes, as its use increased course participation, fostered interaction, and promoted the general enjoyment of the class. The results revealed that the immediate learning performance of the learners who participated in the activity through group use of the IRS was better than that of the learners with individual IRS accounts; however, the individual IRS users seemed to have better learning retention of the learning contents, and showed significant improvement on the delayed tests. Furthermore, the study also confirmed that the IRS with collaborative work could promote the students’ academic and social-emotional performance because the collaborative learning allowed them to learn from peers’ opinions and to make judgments and co-examine the learning concepts again while finding the correct answer. This paper contributes data and analysis that highlight the pedagogical benefits of the implementation of an IRS, and supports the value of using the IRS for college education.     

Navier-Stokes方程可加白噪音的随机小挠动

研究了二维区域上Navier-Stokes方程在较小∈可加白噪音;情形下的挠动,并得到当∈→0时,其随机吸引子是上半连续的.     

多媒体课件交互功能研究

随着多媒体课件在教学中的广泛应用,出现的一些问题倍受关注。通过分析大量现有多媒体课件,发现多媒体课件交互功能缺失,不能引起学习者兴趣,多媒体课件交互功能研究迫在眉睫。从现有多媒体课件存在的问题和交互功能研究现状着手,分析了多媒体课件交互相关概念、交互型多媒体课件的特点、设计原则及其交互功能,以期为多媒体课件设计与开发提供参考。     

Sport and Racial Discrimination in Colonial Zimbabwe: A Reanalysis

The British colony of Southern Rhodesia, later governed by a white settler minority as unilaterally-independent Rhodesia, practiced racial segregation in many spheres, including education, health care access and political participation. Though racial segregation tended to exist on a less formal level than in Rhodesia's neighbour, apartheid South Africa, segregationist policies were nonetheless invasive and virtually complete in some areas. Sport was a heavily contested sphere, in which pockets of black African autonomy and advancement existed alongside near-complete white domination, largely, but not entirely, free of government intrusion. This article is an effort to develop a working hypothesis of racial discrimination in Rhodesian sport, discrimination that was never as formal or complete as in South Africa but which nonetheless provided a firm foundation for Rhodesia's exclusion from international sporting competition in the 1970s.     

《逍遥游（节选）》教材注释商榷

《逍遥游》是庄子的代表作,人教版高中《语文（必修五）》把其收录为必选篇目,然教材对文中“野马”“三餐”“犹然”“数数然”等词语的注释欠妥,今予以辨析。     

在环境管理课程中开展互动式教学的探讨

该文以环境专业大四学生环境管理课为研究对象,探讨了互动式教学方法在大学实用性课程应用效果。试验教学表明,在环境管理涉及学科多且涉及领域复杂的多学科、多领域、实用性强的课程教学中,采用互动式教学方法,能够获得很好的教学效果。精心选题、周密策划、学生积极参与、教师积极引导等是互动式教学方法能否获得成功的关键。该试验教学成果可以为同类型的专业课教学改革提供参考。     

Lowering the Cost Barrier to Higher Education for Undocumented Students: A Promising University-level Intervention

Undocumented students, many of Hispanic origin, face among the strictest cost barriers to higher education in the United States. Lack of legal status excludes them from most state and all federal financial aid programs. Furthermore, most states require them to pay out-of-state tuition rates at publicly supported institutions. In a new direction, boards of trustees at universities in several states have bypassed the legislative process to lower the cost barrier. This policy article evaluates one such university-level innovation.     

“類”与“禷”祭

《诗经》、《尚书》、《周礼》、《礼记》等经籍提到的“禷”祭(又作“類”祭),是上古中国一项有着深厚民俗文化背景和深远历史影响的祭仪。不幸其礼早亡,汉儒已经难究其详。影响及今的《尚书》古文家说和郑玄《礼记》注等,将“禷”祭解为祭天之礼。但根据经籍中的记载来看,“禷”祭指的是当国有大事时,向上帝或社稷宗庙祈福禳灾的一种“祷祈”仪式,与祭天之礼并不是一回事。据《说文解字》等书,“類”字本义是一种犬,可能是白犬。“禷”祭应是指特以“類”为牺牲的祭仪。《山海经》等说“類”具有“自为牝牡”的神奇特性,这与该书所记“白犬有牝牡,是生犬戎”的传说非常相似。在先秦文献中,“類”字常用来指出自同一祖先的子孙后代。这些材料表明“類”与古代中国某些族群的祖先神话有着密切的关系。“禷”祭之形成,正植根于此种观念之上。“禷”祭当属于曾广为流行于上古中国北方地区的犬祭礼俗中某种特定的类型,它的消亡可能与周人颇具理性色彩的的礼制改革有关。     

三环互动教学模式中导学探微——兼谈政治经济学导学体会点滴

经过三年的教学实践与探索,黑龙江电大基本形成了在现代远程开放教育条件下,人才培养模式的基本框架及相应的教学模式:三环互动教学模式。其中的导学,使教师角色发生了重要转变,同时对教师及导学质量提出了更高要求。     

Interactive point cloud blending by drag-and-drop

With the rapid development of 3D digital photography and 3D digital scanning devices, massive amount of point samples can be generated in acquisition of complex, real-world objects, and thus create an urgent need for advanced point-based processing and editing. In this paper, we present an interactive method for blending point-based geometries by dragging-and- dropping one point-based model onto another model’s surface metaphor. We first calculate a blending region based on the polygon of interest when the user drags-and-drops the model. Radial basis function is used to construct an implicit surface which smoothly interpolates with the transition regions. Continuing the drag-and-drop operation will make the system recalculate the blending regions and reconstruct the transition regions. The drag-and-drop operation can be compound in a constructive solid geometry (CSG) manner to interactively construct a complex point-based model from multiple simple ones. Experimental results showed that our method generates good quality transition regions between two raw point clouds and can effectively reduce the rate of overlapping during the blending.