领跑2009：官方·决策

在推进信息技术教育、引领教育信息化发展的进程中,总有一些人在前面领跑。官方的教育决策者在领跑,学术界的信息技术教育专家在领跑,电教馆长在领跑,信息技术教研员在领跑。校长在领跑,信息技术教育媒体也在领跑……这些不同层面、不同岗位上的“领跑人”,都在以不同的方式引领着广大师生奔跑,面向世界,面向未来,面向现代化。     

专注的力量：供应链管理在戴尔

在戴尔的生产车间入口处,装满配件的货车在静静地等着逐一卸货,而一辆辆货车也在等在装配线的出口.在这些货车中,前者由供应商自己提供,后者则属于戴尔选择的最具有竞争力的运输公司,其配送范围覆盖了国内2000个以上的城市.     

An Efficient Two-Phase Model for Computing Influential Nodes in Social Networks Using Social Actions

在社会网络的影响的测量在数据采矿社区收到了很多注意。影响最大化指发现尽量利用信息或产品采纳的有影响的用户的过程。在真实设置,在一个社会网络的一个用户的影响能被行动的集合建模(例如,份额,重新鸣叫,注释) 在其出版物以后由网络的另外的用户表现了。就我们的知识而言,在文学的所有建议模型同等地对待这些行动。然而,它是明显的一工具少些比一样的出版的份额影响的一份出版物相似。这建议每个行动有它影响的自己的水平(或重要性) 。在这份报纸,我们建议一个模型(叫的社会基于行动的影响最大化模型, SAIM ) 为在社会网络的影响最大化。在 SAIM,行动没在测量一个个人的影响力量同等地被考虑,并且它由二主要的步组成。在第一步,我们在社会网络计算每个个人的影响力量。这影响力量用 PageRank 从用户行动被计算。在这步的结束,我们得到每个节点被它的影响力量在标记的一个加权的社会网络。在 SAIM 的第二步,我们计算一个新概念说出 influence-BFS 树的使用的有影响的节点的一个最佳的集合。在大规模真实世界、合成的社会网络上进行的实验在计算揭示我们的模型 SAIM 的好表演,在可接受的时间规模,允许信息的最大的传播的有影响的节点的一个最小的集合。     

泛在网技术产业发展与用户参与的Living Lab创新模式

<正>一、泛在网1、泛在网的由来泛在计算(Ubiquitous Computing)的概念最早是由施乐公司首席科学家Mark Weiser在1991年提出的。在他发表在《科学美国人》杂志的文章"21世纪的计算机"中,Mark预言泛在计算将成为下一代的计算模式。他认为"最具有深远意义的技术是那些从人们注意力中消失的技术,这些技术已经渗透到人们的日常生活中,以致与生活难以区分。"在他的文章里,将泛在计算与文字作了一个类比,他认为文字其实可以被看成是最早的     

人工智能在教育中的7种角色

人工智能不再仅仅包含在科幻电影中,而是已经变成了我们日常生活和工作中的一部分,并且还出现在学校的教室里。当我们使用像Siri和亚马逊Alexa这样的工具时,我们开始看到AI在教育领域的可能性。美国教育部门发布的2017—2021年人工智能市场报告显示,预计在2017—2021年期间,教育人工智能在教育领域将增长47.50%。人工智能在教育领域的预期增长,可以让我们看到它在教室中所扮演的角色。     

小抄速记

Q1如何自动记录文件的打开时间?答:在记事本中,可以记录每次打开某个文本文件的时间,具体方法:在该文件的第一行输入".LOG"(必须是大写的),然后换行开始正文。这样在每次打开了该文件之后,在关闭时会自动在文件后面添加当前的时间。     

仰望星空 跟着时间来旅行

Google的星空图让我们在Android手机上体验了一把星空浪漫,不过只能在某时某地欣赏某个时间点的星空片段。而地球是圆的,始终在公转和自转,随着时间的推移,我们在地球上所处位置的星空也相对在变化,若仰望星空时,能知道现在之外,在这个观测点能看到其他时间星空的样子就更好了。     

向汶川挺进

在此次灾害面前,中国电信的抢险队员们表现十分坚强,因为他们知道自己不是孤立地在战斗,党和政府在关心他们,全国人民都在关注他们,都在伸出援助之手。正是这股精神力量促使他们在道路交通毁损严重、山体滑坡、泥石流频发和余震持续不断的情况下,在很短的时间内打通了马尔康至汶川的通信,完成了几乎不可能完成的任务。     

卡巴斯基在AV—Test独立评测中获得双项大奖

卡巴斯基实验室的个人和企业安全解决方案在最新的AV-Test．org安全套装评测中获得最高分。在2012年7月-8月进行的测试中,卡巴斯基安全部队2013在恶意程序检测和清除两个测试项目上都获得了满分的完美成绩。在另一项独立测试中。KasperskyEndpointSecurity8forWin-dows的测试成绩在8款参加评测的企业安全套装产品中获得第一。这是在过去14个月中,卡巴斯基实验室在企业产品的评测中第6次获得优异成绩。     

刘帆 医院CIO的三种身份

现阶段,信息化在医院中的应用依然停留在业务、管理的工具层面,主要在流程优化等方面发挥作用。而这种对于业务和管理的辅助作用,说明信息化应用还停留在工具层面。在医院领域信息化扮演的角色还需要转变,未来要产生影响业务的效果。在医院里,CIO应该有三种身份。首先他应该是能够站在决策层面的角色。CIO必须了解医院发展的方向,在这个发展进     

浅谈Sybase的磁盘镜象

结合作者的工作经验 ,介绍了在对待硬故障上所采取的特别有效的磁盘镜象技术 ,并给出了一些合理方案和技巧 ,提出了一些自己的看法。     

基于unix系统的不确定数据库解决方案

在unix(包括linux,以下同,不再说明)系统中,当应用程序要操作不确定(即有可能变化)的后台数据库时,程序会很难写,因为unix操作系统本身没有提供操作不同数据库的功能,所以程序不得不随着后台数据库的变化而更改,这就会影响到程序的稳定和性能。因此论文将提出在unix下对不确定的后台数据库进行操作时存在的问题和难点,并讨论这些问题和难点,最后给出一种解决方案。     

Build It (and Customize and Market It) and They Will Come

ABSTRACT

Like other academic libraries, the University Library System of the University of Pittsburgh (ULS) continues to invest in providing anytime, anywhere access to research materials in electronic format. While there are obvious benefits for users in this concomitant increase in complexity for these same users, with many of them, especially undergraduates, turning to the speed and simplicity of Google and away from the complexity of library sponsored electronic resources. Seeking ways to both maximize our investment in full text resources, and promote easy access to this universe of electronic resources for our users, the ULS felt strongly that a navigational solution had to be found, and in 2004 began the process of implementing a federated search tool.

This article discusses the collaborative process between the University Library System and its federated search vendor, and discusses the decision making process behind the customizations made by the ULS to its federated search system. The article also addresses the process of working with a professional marketing organization to developing a marketing message and supporting materials to promote its federated search system, and finally briefly looks at usability and usage statistics to assess the degree to which the Zoom! federated search system has met the goal of providing fast, easy access to high quality information. doi:10.1300/J136v12n03_07     

Adolescent self-control and music and movie piracy

Recent studies have applied Grottfredson and Hirschi’s General Theory of Crime to investigate whether college students’ inclinations toward internet software piracy is related to low self-control and opportunity (i.e., computer ownership). Given the widespread use of the internet to illegally obtain copies of music and movies, it is important to understand the factors in this form of piracy as well. This study applied the self-control perspective to examine the attitudes of high school students toward the internet piracy of music and movies. Attitudes toward the internet piracy of music and movies were related to self-control, biological sex, internet experience, affiliation with deviant peers, and grade level in this study of high school students. This information is important because studies of internet piracy had not yet confirmed the presence and predictability of internet piracy in high school students. This study also suggests that piracy prevention efforts may be most appropriately focused on high school age individuals and directed toward increasing self-control.     

创新创业学分认定及数据可视化系统的设计与实现

创新创业学分认定是创新教育的一项重要工作。由于审核数量众多,申请材料流转复杂,评分标准不一等原因,导致学分认定效率低。为了解决这些问题,从减少教师工作量、提高学生创新意识和满足学校实际工作需求出发,采用B/S模式搭建一个操作简便的学分审核系统。利用Websocket和Java mail技术实现智能推送及预警功能,采用Echarts库实现监控性强、实用性高的数据可视化功能。经测试表明该系统操作简单、稳定强、安全性高,可以提高学校学分认定效率。     

国内外标准法规比对分析系统设计与实现

为发现我国国家标准与国外发达国家标准法规的差距,从根本上提高我国国家标准的总体质量,提升我国产品的质量安全水平,以关键指标(因子)为核心,研究国内外标准法规比对的工作流程,利用面向对象的方法设计,实现了国内外标准法规比对分析系统。该系统适用于所有产品国内外标准法规的比对工作。     

Criticality- and QoS-Based Multiresource Negotiation and Adaptation

This paper presents design, analysis, and implementation of a multiresource management system that enables criticality- and QoS-based resource negotiation and adaptation for mission-critical multimedia applications. With the goal of maximizing the number of high-criticality multimedia streams and the degree of their QoS, it introduces a dynamic scheduling approach using on-line QoS adjustment and multiresource preemption. An integrated multiresource management infrastructure and a set of scheduling algorithms for multiresource preemption and on-line QoS adjustment are presented. The optimality and execution efficiency of two preemption algorithms are analyzed. A primal-dual-algorithm-based approximation solution is shown (1) to be comparable to the linear-programming-based solution, which is near optimal; (2) to outperform a criticality-cognitive baseline algorithm; and (3) to be feasible for on-line scheduling. In addition, the dynamic QoS adjustment scheme is shown to greatly improve the quality of service for video streams. The multiresource management system is part of the Presto multimedia system environment prototyped at Honeywell for mission-critical applications.     

前后端解耦模式及开发

随着互联网技术的快速发展和移动终端设备不断普及,应用系统需要适应不断变化的移动终端设备,需要以用户为中心不断提高系统友好性.因此,本文研究前后端解耦模式的开发.基于JSON数据格式,前端独立开发不断提升用户体验并自适应各类终端的布局.     

浅谈计算机检测维修方法及应用

随着计算机的普及,掌握计算机常规故障的维护维修方法对计算机应用人员尤为重要,本文弃繁从简,避开繁杂的维修理论,将计算机常用检测维修方法进行简化归纳,深入浅出、实用易懂,对提高计算机维修技能大有裨益。     

Wheelchair pushing and turning: lumbar spine and shoulder loads and recommended limits

Abstract

The objective of this study was to determine how simulated manual wheelchair pushing influences biomechanical loading to the lumbar spine and shoulders. Sixty-two subjects performed simulated wheelchair pushing and turning in a laboratory. An electromyography-assisted biomechanical model was used to estimate spinal loads. Moments at the shoulder joint, external hand forces and net turning torque were also assessed. Multiple linear regression techniques were employed to develop biomechanically based wheelchair pushing guidelines relating resultant hand force or net torque to spinal load. Male subjects experienced significantly greater spinal loading (p < 0.01), and spine loads were also increased for wheelchair turning compared to straight wheelchair pushing (p < 0.001). Biomechanically determined maximum acceptable resultant hand forces were 17–18% lower than psychophysically determined limits. We conclude that manual wheelchair pushing and turning can pose biomechanical risk to the lumbar spine and shoulders. Psychophysically determined maximum acceptable push forces do not appear to be protective enough of this biomechanical risk.

Practitioner Summary: This laboratory study investigated biomechanical risk to the low back and shoulders during simulated wheelchair pushing. Manual wheelchair pushing posed biomechanical risk to the lumbar spine (in compression and A/P shear) and to the shoulders. Biomechanically determined wheelchair pushing thresholds are presented and are more protective than the closest psychophysically determined equivalents.