The role of ultrasonography in the diagnosis of anterior cruciate ligament injury: A systematic review and meta-analysis

To evaluate the value of ultrasonography in the diagnosis of anterior cruciate ligament injury (ACL injury) by conducting a systematic review and meta-analysis. A literature search was carried out in the Cochrane Library, Embase, Pubmed databases and included studies prior to April 2017. Based on inclusion and exclusion criteria, studies evaluating ultrasound to diagnose ACL injury were selected. MRI, arthroscopy and clinical-follow were considered the reference standards. The diagnostic accuracy of ultrasound was assessed using a combination of sensitivity, specificity, likelihood ratio (LR), post-test probability, diagnostic odds ratio (DOR) and by summarizing the area under the receiver operating characteristic (SROC) curve. A total of 4 studies involving 246 patients were eventually included in the analysis. In these four studies, the combined sensitivity, specificity, positive likelihood ratio, negative likelihood ratio, post-test probability and DOR were 90.0% (95% CI: 77–96), 97% (95% CI: 90–99), 31.08 (95% CI: 8.75–110.41), 0.11 (95% CI: 0.05–0.24), 89% (3%) and 288.81 (95% CI: 78.51–1062.48), respectively. The area under the SROC curve was 0.98 (95% CI: 0.97–0.99). Our meta-analysis showed that ultrasound can play an important role in the diagnosis of ACL injury. Because of its high sensitivity, high specificity and high diagnostic ability, ultrasound should be a part of the standard diagnostic work-up of an ACL injury.     

Quality of WIL assessment design in higher education: a systematic literature review

We investigated the quality of work-integrated learning (WIL) assessment design in higher education programmes, through review of peer-reviewed studies published internationally and in English, 1990–2015. Such a review is timely in light of vested interests from a range of WIL stakeholders; high-level endorsement of WIL across university programmes; a regulatory environment requiring development and assurance of higher-order learning outcomes; and a WIL assessment literature that identifies a number of challenges and opportunities. We searched six electronic databases, yielding 20 intervention studies that met inclusion criteria. Findings reveal high-quality assessment design, albeit a need for greater involvement of industry/professional partners in assessment practices and stronger alignment between reflective assessment tasks and students' WIL experiences. The evidence base under review largely comprised qualitative and mixed methods studies, with the indication that the quality of the study design had improved over time, although variably across disciplinary fields. The key recommendation from this review is that resources are needed to support research-active WIL academics, partners and students to: (a) design and participate in assessment practices, which promote integration of student learning, across university and work settings, and achievement of higher-order learning outcomes and (b) pursue a collaborative research agenda involving robust evaluation research, inclusive of quantitative studies.     

数字图书馆:体系结构与建设

数字图书馆体系结构的主要构件是数字对象、句柄和仓储.数字图书馆具有文献信息载体活化、馆藏结构和管理逻辑化、信息传递模式全双工化、语言高度抽象化等特征.数字图书馆建设的方法论层面主要包括:知识组织与管理、个性化定制服务、技术使用、资源建设等内容.     

Wang-Ball曲线的扩展

提出了带形状参数的n次Wang-Ball调配函数,它是n次Wang-Ball基函数的扩展,它具有与n次Wang-Ball基函数相似的性质。基于给出的调配函数,构造了带形状参数的多项式曲线。参数λ具有明确的几何意义,当λ增大时,曲线将逼近于控制多边形,当λ=0时,即退化为n次Wang-Ball调配函数,它为曲线设计提供了一种有效的方法。     

我国城市应急联动系统发展研究

城市应急联动系统作为城市公共安全强有力的保障,在应对突发灾难、处理紧急事件中起着不可忽视的作用。本文概括了我国应急联动体系建设的现状,指出各地应根据实际情况,从运行机制、法制建设、应急技术创新等方面,采用不同的模式逐步推进城市应急联动系统的建设。     

中国男青年人体惯性参数的实测研究

通过活体的实际测量,比较中国男青年人体惯性参数和扎齐奥尔斯基等的人体惯性参数所计算人体总重心位置的差异,经统计学数据处理来验证中国男青年人体惯性参数的可靠性。研究表明;中国男青年人体惯性参数比国外５种人体惯性参数更加适合于中国情况,应对中国男青年人体惯性参数推广应用。     

关于综合理科教育的几点思考

本文分析综合理科教育产生的背景 ,介绍我国初中及高等师范院校理科教学的现状 ,提出综合理科教育专业的办学设想。     

强化高校图书馆技术战略管理的思考

从发展的趋势来看，数字化资源将会逐步取代传统的纸质图书成为图书馆的主流馆藏形式，阅读的方式也必然随之发生革命性的交化。高校图书馆必须站在技术发展的前沿，努力推广应用新技术，充分重视数字资零的规划和建设，做好技术规划和培训工作，优化工作评价体系，系统地强化图书馆技术战略管理，才能把握技术发展的机遇，进一步提高图书馆的服务能力。     

美国电视发展中的成功纵向整合

美国电视发展进程中出现三个重要的发展阶段:黑白电视、彩色电视和高清电视三个重要的阶段,每次转折都源于电视产业链条的三个环节同时启动,而启动的市场动力则是产业链环节的纵向整合。     

网络信息资源共建共享障碍因素理论分析

首先，从经济效益角度，通过信息资源共享的效益曲线分析网络环境下区域性信息资源共建共享的障碍因素;其次，用系统论的方法分析共享系统内部的相互关系及其与外部环境间的关联，并导出共享系统相互作用分析图;再次，分别用静态博弈论和动态博弈论的原理，从更微观的层面分析共享主体的策略选择和共享障碍;最后提出相关建议。