Sustainability of a Scale-Up Intervention in Early Mathematics: A Longitudinal Evaluation of Implementation Fidelity

Research Findings: We evaluated the fidelity of implementation and the sustainability of effects of a research-based model for scaling up educational interventions. The model was implemented by 64 teachers in 26 schools in 2 distal city districts serving low-resource communities, with schools randomly assigned to condition. Practice or Policy: Although a logical expectation would be that, after the cessation of external support and professional development provided by the intervention, teachers would show a pattern of decreasing levels of fidelity, these teachers actually demonstrated increasing levels of fidelity, continuing to demonstrate high levels of sustained fidelity in their implementation of the underlying curriculum 2 years past exposure. Different profiles of variables predicted separate aspects of sustainability.     

二分双插入排序算法及其性能研究

在分析了传统二分插入排序算法性能的基础上,给出了一种二分双插入排序算法,这种排序算法使时间性能得到了极大改善.     

供应链库存集成化管理的内涵

本文提出了供应链库存集成化管理的内涵应该包括要素集成、策略集成和信息集成三个方面的观点;归纳了与库存相关的各类要素及其对库存的影响,给出了要素集成的实施框架;回顾了多级库存控制模型的研究成果,给出了企业选用模型的依据;总结了网络环境下供应链库存管理的特点,给出了网络化库存管理信息系统的设计思路。     

基于DEA的地方政府逆向物流管理绩效研究

运用一种多指标输入/输出复杂系统的相对有效性评价方法——数据包络分析法(DEA)对地方政府逆向物流管理绩效进行评价,根据评价结果分析存在的问题并提出相应的解决措施。最后通过算例说明DEA方法是适合于地方政府逆向物流绩效评价的。     

And Baby Makes Four: Predictors of Attachment Security among Preschool-Age Firstborns during the Transition to Siblinghood

The present study examined preschool-age firstborns' adjustment to siblinghood, as indexed by security of firstborn-mother attachment, in a sample of 194 2-parent families. Security of firstborn attachment decreased significantly after a secondborn's birth, but the size of the decrease was smaller among firstborns under 24 months relative to 2–5-year-olds. Mothers' marital harmony and affective involvement with firstborns predicted firstborn security before and after the baby's birth, whereas mothers' psychiatric symptoms predicted firstborn security only after the birth. Post-hoc analyses of select subgroups revealed that mothers of firstborns with high security scores before the newborn's birth, regardless of whether scores remained high or dropped after the birth, showed higher levels of psychosocial and behavioral functioning than did mothers of firstborns with consistently low security scores at both time points. However, substantial drops in firstborn security after a secondborn's birth were associated with higher maternal psychiatric symptom scores both prior to and following the birth. Results suggest that quality of firstborn adjustment to siblinghood can be predicted from both structural and familial aspects of the firstborn environment.     

Refracting schoolgirls: pedagogical intra-actions producing shame

This article contributes to the discussion of gender inequality in schools with the central theme tracing ways that pedagogical affect im/mobilises agency. I argue that what I call ‘the schoolgirl affect’, as distinctly gendered pedagogical practices in schools, constitute a schoolgirl body that refracts capacity for action in particular ways. Karen Barad's theorising of performativity allows me to move away from a definition of what schoolgirl success is and rather discuss ways successful schoolgirls are co-constructed. Using filmed testimonial accounts of former Australian schoolgirls, I attempt to understand how practices of shaming inhibit interest and in fact stultify these students in a myriad of ways. I consider if shame when recognised as materially discursive results in a complex affirmative repositioning that is productive of agency. I interrogate ways that the shame/interest pendulum may affectively constitute schoolgirls, influence ethical educational practices and impact the life trajectories of these particular schoolgirls.     

基于横、纵双向协同的物流服务供应链研究

当前关于供应链协同的研究主要面向于横向协同或纵向协同,对于物流服务商参与的供应链研究也主要体现在纵向协同的层面上,而现实中,供应链系统上下游企业在进行纵向协同的过程中也可能同时采取横向协同的形式。基于此,建立了由供应商、物流服务商和两销售商组成的供应链系统,通过对两销售商不同供应链协同方式比较发现,仅横向协同的供应链系统优于横、纵均不协同的供应链系统,且横向协同供应链具有纵向溢出效应。进一步将横、纵双向协同的供应链模型与仅横向协同的供应链模型进行对比发现,横、纵双向协同情形下,不仅市场需求量增大,销售商的创新投入也加大,并且销售商的单位销售成本也降低,更关键的是系统总利润获得了提高,消费者满意度也进一步改善。最后通过算例对结论进行了论证。     

A confirmatory study of rating scale category effectiveness for the Coaching Efficacy Scale

This study extended validity evidence for measures of coaching efficacy derived from the Coaching Efficacy Scale (CES) by testing the rating scale categorizations suggested in previous research. Previous research provided evidence for the effectiveness of a four-category (4-CAT) structure for high school and collegiate sports coaches; it also suggested that a five-category (5-CAT) structure may be effective for youth sports coaches, because they may be more likely to endorse categories on the lower end of the scale. Coaches of youth sports (N = 492) responded to the CES items with a 5-CAT structure. Across rating scale category effectiveness guidelines, 32 of 34 evidences (94%) provided support for this structure. Data were condensed to a 4-CAT structure by collapsing responses in Category 1 (CAT-1) and Category 2 (CAT-2). Across rating scale category effectiveness guidelines, 25 of 26 evidences (96%) provided support for this structure. Findings provided confirmatory, cross-validation evidence for both the 5-CAT and 4-CAT structures. For empirical, theoretical, and practical reasons, the authors concluded that the 4-CAT structure was preferable to the 5-CAT when CES items are used to measure coaching efficacy. This conclusion is based on the findings of this confirmatory study and the more exploratory findings of Myers, Wolfe, and Feltz (2005).     

Athletes' evaluations of their head coach's coaching competency

This study provided initial validity evidence for multidimensional measures of coaching competency derived from the Coaching Competency Scale (CCS). Data were collected from intercollegiate men's (n = 8) and women's (n = 13) soccer and women's ice hockey teams (n = 11). The total number of athletes was 585. Within teams, a multidimensional internal model was retained in which motivation, game strategy, technique, and character building comprised the dimensions of coaching competency. Some redundancy among the dimensions was observed. Internal reliabilities ranged from very good to excellent. Practical recommendations for the CCS are given in the Discussion section.