广义基本有限生成的TS1-模的性质

定义了广义基本有限生成的TS1-模.主要证明了广义基本有限生成的TS1-模的广义基本有限生成的type子模是广义基本有限生成的TS1-模;M是广义基本有限生成的TS1-模当且仅当对M的任意广义基本有限生成子模N,存在KIM,使得N≤geK.     

运用双级数控选模法对体院教师工作状况(成绩)综合评定的实验研究

本文根据统计学原理、控制理论及人的认知规律研究设计出了双级数控选模评定模型,并试图将它应用于对体院教师工作状态(成绩)的综合考评,经过实验验证和理论分析,表明这一办法具有较强的科学性,且经济实用,达到了评定考核中减少人为因素影响、简化指标体系的目的。     

浅谈如何提高散手摔法的有效性

文章从适应散手竞赛规则对摔法有效性的特殊要求入手,明确阐述散手摔法的本质内涵及其有效实施所应具备的条件;运用生物学知识和力学原理,并结合散手教学、训练、比赛中的实践经验,系统剖析影响散手摔法有效性的因素,以不断提高摔法的有效性,为进一步探讨散手实战能力的提高提供有益参考。     

影响跳远运动员助跑准确性的因素及其克服的方法

在论述跳远运动员助跑准确性的重要性的基础上,提出了影响跳远运动员助跑准确性的因素及其克服的方法,同时,提出了提高运动员助跑准确性的训练方法和手段.     

A Quantum Measurement Paradigm for Educational Predicates: Implications for validity in educational measurement

Abstract

The outcomes of educational assessments undoubtedly have real implications for students, teachers, schools and education in the widest sense. Assessment results are, for example, used to award qualifications that determine future educational or vocational pathways of students. The results obtained by students in assessments are also used to gauge individual teacher quality, to hold schools to account for the standards achieved by their students, and to compare international education systems. Given the current high-stakes nature of educational assessment, it is imperative that the measurement practices involved have stable philosophical foundations. However, this article casts doubt on the theoretical underpinnings of contemporary educational measurement models. Aspects of Wittgenstein’s later philosophy and Bohr’s philosophy of quantum theory are used to argue that a quantum theoretical rather than a Newtonian model is appropriate for educational measurement, and the associated implications for the concept of validity are elucidated. Whilst it is acknowledged that the transition to a quantum theoretical framework would not lead to the demise of educational assessment, it is argued that, where practical, current high-stakes assessments should be reformed to become as ‘low-stakes’ as possible. This article also undermines some of the pro high-stakes testing rhetoric that has a tendency to afflict education.     

Screening for potential child maltreatment in parents of a newborn baby: The predictive validity of an Instrument for early identification of Parents At Risk for child Abuse and Neglect (IPARAN)

For preventive purposes it is important to be able to identify families with a high risk of child maltreatment at an early stage. Therefore we developed an actuarial instrument for screening families with a newborn baby, the Instrument for identification of Parents At Risk for child Abuse and Neglect (IPARAN). The aim of this study was to assess the predictive validity of the IPARAN and to examine whether combining actuarial and clinical methods leads to an improvement of the predictive validity. We examined the predictive validity by calculating several performance indicators (i.e., sensitivity, specificity and the Area Under the receiver operating characteristic Curve [AUC]) in a sample of 4692 Dutch families with newborns. The outcome measure was a report of child maltreatment at Child Protection Services during a follow-up of 3 years. For 17 children (.4%) a report of maltreatment was registered. The predictive validity of the IPARAN was significantly better than chance (AUC = .700, 95% CI [.567–.832]), in contrast to a low value for clinical judgement of nurses of the Youth Health Care Centers (AUC = .591, 95% CI [.422–.759]). The combination of the IPARAN and clinical judgement resulted in the highest predictive validity (AUC = .720, 95% CI [.593–.847]), however, the difference between the methods did not reach statistical significance. The good predictive validity of the IPARAN in combination with clinical judgment of the nurse enables professionals to assess risks at an early stage and to make referrals to early intervention programs.     

教育舆情研究:从兴起到有效的路径探索

教育舆情研究已由萌芽阶段进入到兴起阶段,但规范的教育舆情研究尚未形成。教育舆情研究要从研究主体、研究对象和研究手段等方面加以规范,规范的教育舆情研究会提升舆情效度。教育舆情的有效性来自于信息采集和舆情分析两个环节,需要专业的研究主体和研究手段,逐步形成相应的研究范式。这是教育政策决策的需要,也是教育治理过程中关注民生,体恤草根意愿的必然选择。     

高校图书馆用户关系管理有效性评价指标体系初探

结合高校图书馆自身情况,参考相关文献的基础上,初选出19个指标对高校图书馆用户关系管理有效性进行评价。通过专家调查法,运用隶属度分析对理论指标进行了实证筛选,构建出以用户知识、用户互动、用户反应和用户价值实现为一级指标和从中细分的16个二级指标共同组成的高校图书馆用户关系管理有效性评价体系。     

延缓生长法在试管内保存牛皮杜鹃种质初探

以牛皮杜鹃嫩茎基部直接再生形成的丛生芽团为试材,应用均匀设计法探讨了影响牛皮杜鹃丛生芽团试管保存的主要因子和水平,同时筛选最适于牛皮杜鹃丛生芽团试管保存的培养基,结果表明:最适宜的丛生芽团试管保存培养基为:DR+根皮苷2.70 mg/L+KT0.70 mg/L,保存46个月生长率仅为1.12%.对保存前后的芽苗分化的结...     

从速度的定义谈运动的本质

分析了速度概念的起源、目的和意义,并从匀速运动的速度定义式中揭开了时间引入物理学中的深刻含义,即定义式中的时间就是一种假想的、抽象的匀速运动。从瞬时速度的定义中发现,描述客观运动的物理量只能反映运动的某个属性,并不是整个运动本身。进一步分析了用动量和动能来量度运动的意义。