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.     

整体式外套框架增层建筑的合理计算方法

对国内以往采用的整体式外套框架增层结构形式进行了较全面的分析,指出了常见的8种计算模型存在的严重问题.提出了新的计算模型和具体的计算方法,以及保证计算模型实现的可行措施、限制条件、适用范围等,对提高整体式外套框架增层房屋的设计质量有一定参考价值.     

21世纪中国水价、水权与水市场建设研讨会召开

“21世纪中国水价、水权与水市场建设研讨会”于2001年3月20日在广西壮族自治区北海市开幕.在为期两天的研讨会上，有来自全国各地的近170位水行业的代表讨论和交流了中外水权和水价问题. 开幕式由主办方代表刘思政主持，广西壮族自治区水利厅副厅长陈中宁首先发表讲话，他代表广西对代表的到来表示欢迎，随后他向代表们介绍了广西的水价以及在水市场方面的情况.他说，此次研讨会的召开对广西水市场工作有指导意义. 参加会议的领导还有：中国水利经济研究会理事长陈美章、水利部经调司领导魏炳才、太湖流域管理局副局长叶寿仁、江苏省水利厅副厅长徐俊仁、湖南省水利厅副厅长皮颂妥、珠江水利经济研究会常务副理事长李志远. “21世纪中国水价、水权与水市场建设研讨会”引起了各新闻媒体的关注，水信息网、中国水利报、水利水电技术杂志、三联生活周刊、中国环境报等都派驻记者进行报道. (摘自“中国水利科技网”2001年3月20日)     

The Sweet Gift卿卿我我

想好今年圣诞节送给她什么礼物了吗？讨得佳人的欢心自然不难，因为如今有了奥林巴斯μ-mini。     

主板也有分身术—捷波“分身精灵”应用详解

对于普通用户来说,刷新显卡的BIOS仍然是带有一定的难度,尤其是在DOS下进行刷新的操作。如今,一些主板大厂已经把主板BIOS的刷新由DOS下操作升级到Windows下操作了,在Windows下更新BIOS的确没有DOS下麻烦和危险。在NVIDIA显卡盛行的时代里,刷新程序依然只能在DOS下操作,似乎有点落后。其实,丽台也推出一个丽眼(WinFox)硬件监控程序,除了可以调整显示模式外,还有可以实现在Windows     

多段超前封闭下掘法在柱基顶升中的应用

本文主要介绍了在冶金厂房利用钢管摩擦桩(简称钢管桩)托换、顶升、复位和加固厂房柱基础过程中人工开挖柱基础底部作业坑(简称基底作业坑)的实践。     

聚合物-蒙脱石纳米复合材料的制备、结构与性能

从结构与性能的观点出发,将聚合物-蒙脱石纳米复合材料划分为插层型、层离型和混合型(插层型+层离型),探讨了影响蒙脱石纳米化的因素,提出了蒙脱石纳米化中值得注意的几个问题.