HTML5移动web应用技术实现分析

与Native应用相比,移动web应用能很好地解决目前Native操作系统割裂的问题,将为产业链各方带来全新的平等竞争机会,引导移动互联网产业链的新模式发展。本文首先介绍了HTML5移动web应用的发展概况,然后分析了基于HTML5移动web应用相关技术标准的发展情况,随后对基于HTML5的移动web应用及终端的技术实现方案进行了分析,最后对全文内容进行了总结,从HTML5移动web应用、技术标准及终端的发展趋势进行了展望。     

移动通信可扩展的开放式应用平台OMAP4430

OMAP4430是TI公司推出的开放式多媒体可扩展应用平台,对于移动通信开发应用具有一定的价值。本文主要从硬件结构、软件架构两个方面进行阐述,突出OMAP4430的低能耗、高性能、高集成度以及在现代通信与多媒体技术中的相关应用。     

基于XML元素加密的Web服务安全策略

Web服务使开发人员能够建立一种面向服务的、平台无关的、分布式的应用程序架构,另一方面Web服务使用XML在网络中进行数据交换,如何提高Web服务的安全性则成为需要解决的关键问题。本文论述了基于对XML文件中的元素进行加密的策略,从而保证了Web服务安全性。     

On the use of open-source firewalls in ICS/SCADA systems

ABSTRACT

Firewalls are one of the most widely used security devices to protect a communications network. They help secure it by blocking unwanted traffic from entering or leaving the protected network. Several commercial vendors have extended their firewall capabilities to support SCADA protocols or designed SCADA-specific firewalls. Although open-source firewalls are used successfully in IT networks, their use in SCADA networks has not been properly investigated. In this research we investigate the major open-source firewalls for their use in SCADA networks and identify Linux iptables’ potential as an effective SCADA firewall. Iptables is a powerful open-source firewall solution available as part of most Linux distributions in use today. In general, use of iptables as a network-level firewall for SCADA systems has been limited to basic port and host filtering, without further inspection of control messages. We propose and demonstrate a novel methodology to use iptables as an effective firewall for SCADA systems. This is achieved by utilizing advanced iptables features that allow for dynamic inspection of packet data. It is noteworthy to mention that the proposed solution does not require any modification to the netfilter/iptables framework, making it possible to turn a Linux system into an effective SCADA firewall. The approach has been tested by defining filtering rules for the Modbus TCP protocol and validating its ability to defend against various attacks on the protocol.     

Two for the General Audience Plus a Survey on BI

Abstract

The research in this paper considers the complex and dynamic arrangements for potential and actual knowledge sharing in interorganizational networks. The essence of this stance is that “knowledge” relates to affirmative managerial action beyond the necessary collection of information facilitated through technology. The issue is to determine the nature and extent of the degree of organizational agreement that may be achieved as competitors either cooperate or continue to compete in the face of challenging and pervasive market conditions. The theory relating to network formulation is reviewed, findings from empirical analyses from the experiences from automobile distributors in a large USA city, and one scientific collaborators network are presented. A framework is proposed identifying the factors necessary to initially construct the network and then to further sustain it over time. A number of lessons learned are developed, which are believed to be of value to researchers and practitioners engaged in these processes.     

Communicating with Faculty,Staff, and Students Using Library Blogs: Results from a Survey of Academic Health Sciences Libraries

This study investigated use and management of blogs in academic health sciences libraries. Quantitative and qualitative data were collected with a questionnaire distributed to bloggers and administrators representing 22 libraries self-identified as using blogs to publish library newsletters. Perceived barriers to use of blogs included lack of patron awareness and technical issues. Blogs were viewed as easy to use by librarians and blogs are used to promote licensed resources. Blogs do not replace other interactions with librarians, but in the future, could be used to develop a community, provide tools for learning, and increase visibility of the library.     

Appalachian State University Libraries' Ask A Librarian: A Reference Service for ASU Students,Faculty, Staff,and Alumni

SUMMARY

As dynamic content is filling the Internet, so are choices for implementing this service/tool for Web developers. This article concentrates on one of the solutions that offers choices and tools in a single free package. Zope delivers Web-based content using a variety of sources and Internet connections. At Appalachian State University, Ask A Librarian http://www.library.appstate.edu/reference/askref.html concentrates on using Zope, the PostgreSQL database, e-mail, and the Web to offer patrons the opportunity to receive guidance from reference librarians while at a remote location.     

Open source: the Russian experience (legislation and practice)

The emergence of so-called free or open-source software and the growth of its economic importance in various industries make questions regarding the legal status of free/open-source licenses especially important. In December 2010, new draft amendments to the Civil Code were published, introducing new concepts in order to reflect the ideas pursued by these types of licenses. This article analyzes existing problems with the legal status of free/open-source licenses, whether proposed amendments may solve them, and what risks they may create. Since Russia is among the first countries trying to include provisions on free/open-source licenses in its legislation, such analysis may be of interest to foreign lawmakers since the concept of open source is universal all over the world.     

武汉轨道交通2号线岩溶地段隧道工法研究

武汉地铁2号线虎泉站-光谷广场站区间隧道沿线灰岩分布广泛,岩溶发育,采取钻探、物探等综合勘探技术,查明了岩溶分布特性。在区间隧道施工前,进行了溶洞注浆加固处理;并在此基础上,对区间隧道矿山法、盾构法以及明挖法等工法进行了综合比较,提出了适应本地层条件下的矿山法施工方案,达到了预期的效果,可为类似工程的设计和施工提供借鉴。     

双岭电站堰面模板施工

双岭电站堰面采用近似折线型,在施工中如何保证堰面曲线精度是一个至关重要的问题,介绍了在施工中采取定型模、定型桁架、拉模和人工抹面的施工方法.