中国网络信息存档及其与国外的比较——基于国家图书馆WICP项目的研究

为了更好地保存我国的网络信息资源,通过对国家图书馆开展的网络信息存档项目——网络信息资源采集与保存实验项目(WICP)发展现状的分析以及与其他国家网络信息资源存档项目的比较,发现我国网络信息资源保存项目需要在资源采集方式、经费支撑、法律保障、合作保存、开发利用等方面继续努力,特别是要争取早日实现网络信息资源的法定呈缴与合作保存。     

Consumerisation in UK higher education business schools: higher fees,greater stress and debatable outcomes

For many UK higher education business schools, the continued recruitment of UK, EU and international students is crucial for financial stability, viability and independence. Due to increasingly competitive funding models across the sector, many institutional leaders and administrators are making decisions typical of highly marketised consumer environments. Thus, this paper explores academics’ perceptions of the impact of consumerisation in UK higher education business schools. To achieve this, 22 business school academics were interviewed within three UK higher education institutions (HEIs) in the North of England. Participants had a minimum of three years teaching experience. Data was analysed using template analysis taking an interpretive approach. The findings indicate that academics perceived the introduction of tuition fees to have been the catalyst for students increasing demonstration of customer-like behaviour: viewing the education process as transactional, with the HEI providing a ‘paid for’ service. It is argued that these changes in UK higher education have created tensions between university leaders and academics, creating genuine dilemmas for those with decision-making responsibilities who must balance academic integrity and long-term institutional financial viability.     

面向“互联网+”的图书荐购模型研究与实践

面向"互联网+"时代,文章以图书荐购为研究对象,首先分析了"互联网+"时代图书采访工作发生的变化与机遇,然后分析了图书采访工作当前的应用研究进展,提出了开放式图书荐购服务模型和系统平台,接着分享了昆明理工大学图书馆的开放式图书荐购实践情况,最后就目前存在的问题做了总结与展望。     

论全球化语境下中国英语产生的必然性

在全球化语境下,英语的国际化不可避免的造成了英语在不同社会及文化中的本地化,世界各地的英语变体相继出现.世界英语变体的理论框架为中国英语能被看作世界英语变体之一提供了依据.英语在中国实现的功能进一步论证中国英语的出现是可以接受且必需的,中国英语有其产生的必然性.     

WAPN: a distributed wormhole attack detection approach for wireless sensor networks

As the applications of wireless sensor networks （WSNs） diversify, providing secure communication is emerging as a critical requirement. In this paper, we investigate the detection of wormhole attack, a serious security issue for WSNs. Wormhole attack is difficult to detect and prevent, as it can work without compromising sensor nodes or breaching the encryption key. We present a wormhole attack detection approach based on the probability distribution of the neighboring-node-number, WAPN, which helps the sensor nodes to judge distributively whether a wormhole attack is taking place and whether they are in the influencing area of the attack. WAPN can be easily implemented in resource-constrained WSNs without any additional requirements such as node localization, tight synchronization, or directional antennas. WAPN uses the neighboring-node-number as the judging criterion, since a wormhole usually results in a significant increase of the neighboring-node-number due to the extra attacking link. Firstly, we model the distribution of the neighboring-node-number in the form of a Bernoulli distribution. Then the model is simplified to meet the sensor nodes＇ constraints in computing and memory capacity. Finally, we propose a simple method to obtain the threshold number, which is used to detect the existence of a wormhole, Simulation results show that WAPN is effective under the conditions of different network topologies and wormhole parameters.     

加强高职院校学生的理想信念教育的途径和方法初探

本文仅就加强高职院校学生的理想信念教育的迫切性以及当前高职院校学生理想信念状况进行了阐释,对加强高职院校学生的理想信念教育的途径和方法进行了探索.     

Microfluidic fabrication of polymeric core-shell microspheres for controlled release applications

We report a facile and robust microfluidic method to fabricate polymeric core-shell microspheres as delivery vehicles for biomedical applications. The characteristics of core-shell microspheres can be precisely and easily tuned by manipulating the microfluidic double emulsion templates. The addition of a shell can significantly improve the versatility as well as functionality of these microspheres as delivery vehicles. We demonstrate that the nature of the shell material plays an important role in the properties of the core-shell delivery vehicles. The release kinetics is significantly influenced by the material of the shell and other characteristics such as the thickness. For example, by adding a poly(lactic-co-glycolic acid) (PLGA) shell to an alginate core, the encapsulation efficiency is enhanced and undesired leakage of hydrophilic actives is prevented. By contrast, adding an alginate shell to PLGA core can lead to a reduction of the initial release rate, thus extending the release period of hydrophobic actives. Microfluidic fabrication enables the generation of precisely controlled core-shell microspheres with a narrow size distribution, which enables the investigation of the relationship between the release kinetics of these microspheres and their characteristics. The approach of using core-shell particles as delivery vehicles creates new opportunities to customize the release kinetics of active ingredients.     

2012年度国家自然科学基金工程与材料科学领域“人才板块”项目申请与资助概况浅析

引言人才板块项目作为国家自然科学基金委员会(以下简称自然科学基金委)资助格局中的重要组成部分,项目申请数占总申请量的45%左右,以国家杰出青年科学基金和创新研究群体科学基金为代表的人才基金项目已成为国家自然科学基金(以下简称科学基金)系列中很有影响的两张"名片"。青年科学基金、优秀青年科学基金、国家杰出青年科学基     

Hip extension during the come-out of multiple forward and inward pike somersaulting dives is controlled by eccentric contraction of the hip flexors

Abstract

A modelling approach was used in the present study to investigate the role of the hip muscles during the come-out of forward and inward multiple somersaulting dives in a pike position. A planar two-segment model was used to simulate the somersault and come-out of three commonly performed dives from a 3-m springboard: forward two-and-one-half somersault pike dive (105B), forward three-and-one-half somersault pike dive (107B), and inward two-and-one-half somersault pike dive (405B). Three simulations were run for each dive: (1) hip angle was constrained to be constant, (2) hip torque was removed after 0.1 s, and (3) hip angle was constrained to a typical come-out time history used by elite divers. Simulation results indicated that hip flexion torque was required both to maintain a rigid pike position during somersault (range = 205.5–282.3 Nm) and to control the hip extension movement during the come-out (peak torque range = 355.8–548.1 Nm) in forward and inward multiple somersaulting dives. Coaches and divers should be aware that dry-land exercise drills producing hip extension movement by concentric actions of the hip extensor muscles do not replicate the neuromuscular control during the come-out of fast rotating dives.     

竞技视域下空手道运动中“控”的探骊

“控”是空手道运动的重要技术特征,对空手道组手比赛获胜起着至关重要的作用。文章运用文献资料法、田野调查法、录像分析法与专家访谈法,对空手道组手比赛中“控”的运用状况进行了分析与阐述,得出在空手道组手比赛中合理有效的对人的因素（自身、对手、裁判员、教练员、观众）与物的因素（场地、规则）控制是获取比赛胜利的核心环节。