Toward Energy-Efficient and Trustworthy eHealth Monitoring System

The rapid technological convergence between Internet of Things(IoT),Wireless Body Area Networks(WBANs)and cloud computing has made e-healthcare emerge as a promising application domain,which has significant potential to improve the quality of medical care.In particular,patient-centric health monitoring plays a vital role in e-healthcare service,involving a set of important operations ranging from medical data collection and aggregation,data transmission and segregation,to data analytics.This survey paper firstly presents an architectural framework to describe the entire monitoring life cycle and highlight the essential service components.More detailed discussions are then devoted to {\em data collection} at patient side,which we argue that it serves as fundamental basis in achieving robust,efficient,and secure health monitoring.Subsequently,a profound discussion of the security threats targeting eHealth monitoring systems is presented,and the major limitations of the existing solutions are analyzed and extensively discussed.Finally,a set of design challenges is identified in order to achieve high quality and secure patient-centric monitoring schemes,along with some potential solutions.     

“至上”与“虚无”

<正>俄国画家马列维奇是"至上主义"抽象绘画流派的创始者,其绘画作品简约而纯粹,以最简单的形式——方块展现出艺术家丰富的感情世界,探索了形体、色彩与空间的关系。而同样善于运用几何形态的西班牙雕塑家奥泰萨的风格则显得冷静而克制,其雕塑作品通常看起来虚幻而抽象,没有强烈的情感表现,以高度理性化的手法展现出一种"虚无"的艺术境界。二人所专注的领域虽有不同,但他们的作品都在关注形式与其所在空间之间的复杂关系。     

Strain rate dependency and fragmentation pattern of expanding warheads

For the characterization of the behaviors of a metal material in events like expanding warheads, it is necessary to know its strength and ductility at high strain rates, around 104e105/s. The flyer plate impact testing produces the uniform stress and strain rates but the testing is expensive. The Taylor test is relatively inexpensive but produces non-uniform stress and strain fields, and the results are not so easily inferred for material modeling. In the split-Hopkinson bar(SHB), which may be used in compression, tension and torsion testing, the strain rates never exceeds 103/s. In the present work, we use the expanding ring test where the strain rate is 104e105/s. A streak camera is used to examine the expanding ring velocity, and a water tank is used to collect the fragments. The experimental results are compared with the numerical simulations using the hydrocodes AUTODYN, IMPETUS Afea and a regularized smooth particle(RSPH) software. The number of fragments increases with the increase in the expansion velocity of the rings. The number of fragments is similar to the experimental results. The RSPH software shows much the same results as the AUTODYN where the Lagrangian solver is used for the ring. The IMPETUS Afea solver shows a somewhat different fragmentation characteristic due to the node splitting algorithm that induces pronounced tensile splitting.     

找乐要乘早 莫负黄金周——欢度五一超完美规划

五一长假是众多上班族在春节后就一直在企盼的大日子，七天的胜利大逃亡是驱散疲劳、实现梦想、增进感情、宣泄压抑的最佳机会。而机会只留给有准备的人，只有早做打算、谋划周详，才能成竹在胸、悠然度假。否则，黄金周倏忽而逝，好时光一去不还，留给碌碌无为者的只有追悔莫及。《文萃》以为读者找乐为己任，特推出本期“特别制造”为大家的假日行动出谋划策，相信经过IT技能的全方位辅助，一年一度的节日将过得更加欢畅淋漓、多姿多彩![编者按]     

彼此相爱的自由歌者

未曾预料这间房子如此之小,却在打开门的一瞬间有种情投意合的奇妙感觉。像是Linda不无得意告诉我的,截至楼梯口为止,你不会想象到这里任何一处布置,因为每个角落都是我们费劲心思点缀出来的,是属于彼此两个人的家。 Linda和Frankie是一对自由歌者,喜欢随意走着四处去唱歌给别人听。见面的时候,他们刚刚结束一场遥远的演出飞回来,照理说这样的人本该将家     

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我是一个喜欢躲在显示屏后面看世界的人，宁可在虚幻的网络中感受片刻稀薄的温情，也不愿在现实世界里付出．被骗。     

用DirectX诊断工具在局域网里聊天

现在上学校的微机很是无聊，很多同学都选择在这个时候在电脑上聊天，但是大多数的人都是用共享文件夹的方式，用Word等文字编译软件来聊天，这样不仅不符合一般的聊天习惯，而且还不方便，比如说如果一个人正在编辑这个文档的话，那么其他人只有等到那个人编辑完了以后才可以继续发表看法。现在我向大家推荐一种方法，可以在一般情况下不借助其他第三方软件就可以在局城网中聊天。     

踏入雷区体验迅雷新功能

最近下载客户端市场可谓硝烟弥漫,腾讯发布了超级旋风,FlashGet(网际快车)则携带支持HTTP,支持BT等重磅炸弹重返江湖。迅雷也推出了最新的版本,增加了许多实用有趣的功能,下面咱们就踏入“雷区”,去体验迅雷的新功能。     

葡萄美酒夜光杯

如果你力图营造一种朦胧的气氛,反而不容易达到理想的意境。你把灯光调暗了,老式唱机里Jazz在空气中弥漫,然而,似乎缺少了什么。不再需要憋脚的语音,此时无声胜有声,因为两颗心会在醉人的酒杯交错之间进发出浪漫的火花。