Planning for the Budget-ocalypse: The Evolution of a Serials/ER Cancellation Methodology

The University of North Texas (UNT) Libraries are funded almost entirely by undergraduate student use fees. As the undergraduate enrollment has plateaued in recent years, the libraries have not been able to keep up with rising costs, resulting in a series of cuts to the materials budget totaling around $3.25 million. While some of these cuts took the form of reductions in firm orders and dissolution of approval plans, for the past three years the bulk has come from cancellations of serials and electronic resources. With each year’s cuts, the UNT Collection Development department has been forced to modify and refine their deselection process. This article will show the development of UNT’s strategy for determining cancellations using a variety of methods (overlap analysis, usage statistics, faculty input) and tools (EBSCO Usage Consolidation, Serials Solutions 360).     

实时交通流条件下船舶航道航行风险预警模型

为提高航道内实时交通事故预警精度,基于长江下游两个水道内发生的交通事故数据和船舶检测器数据,运用随机森林(Random Forest,RF)模型对事故发生前20~40 min内的航道状态初始数据进行重要变量筛选,根据筛选出的4个最重要的变量结合高斯混合模型和最大期望算法构建新的事故预警贝叶斯网络(Bayesian Network,BN)模型.实例检验表明:新的BN模型优于直接利用初始数据建立的模型,事故预警正确率达到81.29%;可转移性测试中新的BN模型的事故预警正确率虽有所降低,但整体预警正确率和事故预警正确率仍高于利用初始数据建立的模型;新的BN模型用于实时船舶交通流航行风险预警是有效的.     

基于贝叶斯网络的航空维修差错致因分析

近年来事故分析显示,维修差错导致的航空事故在总事故中占较大的比重,精确分析维修差错的诱发因素有助于提高维修质量管理。在分析维修差错模式及诱发因素的基础上,基于贝叶斯网络建立了以维修任务为叶节点的差错致因分析网络,通过概率重要度分析和关键重要度分析对维修差错致因进行了定性、定量评估。通过对某航空事故的分析表明该方法切实可行。     

统计学专业教学现状与改革的思考

统计学是是一门多学科相交叉的边缘学科,具有很强的应用性。本文通过对美国一流统计学专业教学特点与特色的描述,分析了国内统计学教学中存在的主要问题,最后从教学理念转变、课程计划更新、教材资料优选、应用能力培养四个方面对该专业的教学改革提出了自己的观点。     

关于独立学院统计学课程教学的几点思考

独立学院作为一种新兴的办学模式,主要以应用型人才为培养方向。统计学作为一门应用性极强的课程,在独立学院中广泛地开展。作者结合自身教学实践体会,对独立学院非统计专业的统计学课程教学中存在的问题,从教师队伍、教学过程、考核环节等方面进行分析,提出几点看法,以期促进独立学院统计学课程教学的改进和发展。     

心理统计学教学改革的思考与实践

文章结合心理统计学教学存在的问题和发展趋势,尝试进行心理统计学课程的教学改革探讨,具体包括教学内容、教学方法和评价方法3个方面：教学内容改革主要体现为从应用的角度对教学内容进行取舍;教学方法改革主要涉及在教学形式方面的探索;评价方法改革简述了在形成性评价方面的尝试。结果表明,教改在一定程度上改善了之前教学中存在的问题,提高了学生的相关能力,也促进了教师的发展。     

Unders and Overs: Using a Dice Game to Illustrate Basic Probability Concepts

In this paper, the dice game Unders and Overs is described and presented as an active learning exercise to introduce basic probability concepts. The implementation of the exercise is outlined and the resulting presentation of various probability concepts are described.     

Online homework impact in undergraduate mathematics and business statistics courses

This evaluation examines the impact on student success rates related to changes in instructional programmes in undergraduate mathematics and statistics courses. Success for students taking courses with a computer-based homework component was compared with success of students who took the course in prior semesters without the computer-based component. Graphical and analytical tools are used to compare results. Results come from multiple semesters of each type of homework application, for both pre-calculus algebra and business statistics courses. Students whose performance is utilised in this study are undergraduate students taking introductory level college mathematics or business statistics courses, with mostly no prior instruction at this level. Comparing the success of the intervention group with the success of the baseline control group, findings support that the students using the computer-based homework instruction are just as successful as those using the traditional method of homework instruction. Utilising the online homework applications, provide several important advantages in today’s universities, including the reduced time for faculty grading, consistency of graded assignments across all sections of a course and most importantly, immediate feedback for students.     

Four Perspectives on Flipping the Statistics Classroom: Changing Pedagogy to Enhance Student-Centered Learning

Abstract

The term “flipped” or “inverted” classroom includes a broad range of pedagogical innovations, and has recently received a significant amount of press. Although flipping an entire course might be a more extreme step than most are able to take, we discuss modular ideas for change that can be more easily implemented. This paper offers the perspective of four faculty members at different institutions who have all flipped material in statistics courses that were already highly interactive and activity-based. We share common pitfalls and core ideas that were found among diverse environments.     

Visualizing statistical edutainment: What you see is what you get

Concepts of data visualization are explored using statistics educational fun items and illustrated by sharing results from the experiment we conducted on cartoon captions.