Interfacing with Amazon Web Services Using Java and .NET: A Comparative Study

ABSTRACT

Web service has been touted by many as the next big thing in IT in recent years. It is a promising technology that opens up new avenues for software developers and permits businesses to explore new markets and forge new business partnerships. Amazon.com is one such business that is using Web services to improve sales of its products. This research activity involves developing a client application that consumes the Amazon Web services. The client application has been developed using the two competing environments, .NET and Java, and the experience of this activity has been thoroughly documented. The relative strengths and weaknesses of the two architectures are compared and contrasted and recommendations are provided for beginning and experienced developers wishing to get started with Web services.     

Application controlled caching for web servers

Today's web servers must have the ability to deal with large data sets, and their performance mainly depends on the control mechanism of the disc cache. Though the cache replacement algorithms in operating systems generally perform well, application-specific policies can often perform much better. In this paper, we present the application-controlled caching in user space (ACCUS) mechanism for web server disc caching. With this mechanism, an application can schedule the service requests based on the cache status of the requested files to improve its performance so that the system can gain a high parallelism of CPU processing, networking I/O and disc I/O. An application can service the cached files with a higher priority to the ones not cached, which helps reduce the latency caused by disc I/O blocking. Meanwhile, the application can enforce a policy for domain-specific cache management to obtain a higher cache hit ratio. ACCUS is implemented in two web servers of different models, Flash and userver. Despite the great differences in architectures, the empirical results show that both servers can achieve high throughput under heavy workloads with ACCUS enabled. Performance analysis for two other typical web servers, Apache? and Zeus Web Server are also conducted and the results indicate that ACCUS can achieve significant improvement in performance.     

基于Web教学系统的设计与实现

本文分析了教学系统的需求情况,完成了系统设计与实现工作,所完成的教学系统能够有效降低教学成本、提高教学效率、方便教学管理,进而推动教育现代化进程。     

A Framework for Valuing Web Site Personalization

ABSTRACT

Web related initiatives are a viable method for many companies seeking to enhance their customer focus. Web personalization is a technique that can be used by firms to develop and foster relationships with their customers. Web personalization may not be suitable for all types of businesses. Web personalization is used to generate individualized content for each visitor. Personalization techniques include content filtering, collaborative filtering, and a rules-based engine approach. The scope and technique chosen for the personalization initiative determine the resources required for successful implementation. This paper presents a framework to help firms ascertain the value of web personalization. The components of the framework include the ability to classify the popular features of the website, the degree the product is considered personal, the competitiveness of the market, and the value customers place on personalization. A survey was conducted and results of the survey are presented to help determine factors that influence an individual's value for personalization. The factors we found that influence the value an individual places on personalization include: sites that belong to an established brick and mortar company, sites that let visitors download music, and sites that offer the possibility of winning something. The first two factors were found to positively impact the value an individual places on personalization, while the ability to win something was found to have a negative impact on personalization. We also found that education played a part in determining whether an individual values personalization. Other characteristics such as age group and gender were found not to influence an individual's value for personalization.     

Library2．0：提升图书馆服务理念

近年来，数字网络技术的应用和普及令图书馆的生存环境逐渐发生了变化，“守株待兔”的被动服务令图书馆的原有用户逐渐流失，1ibrary2．0概念在这样的背景下应运而生。一方面，RSS、Blog、Tag、Wiki等web2．0技术为library2．0的实现提供技术支持，另一方面，1ibrary2．0更是一种焕然一新的图书馆服务理念，让图书馆服务更贴近数字时代的用户需求。     

Web2．0环境下的图书馆数字参考咨询服务

Web2．0是一种以用户中心的网络技术和服务，它的出现为图书馆数字参考咨询服务带了机遇与挑战。该文介绍了Web2．0环境下数字参考咨询服务呈现的新特征，重点阐述了Web2．0技术中的Blog、Wiki和RSS在参考咨询服务中的应用。     

基于WEB的服务组合系统设计与实现

服务组合是通过重用已有的Web服务满足用户高质量的应用需求的一种技术手段,是面向服务架构研究领域的热点问题。本文采用基于业务流的服务组合方式,设计并实现基于Web的服务组合系统,并结合校园用户需求给出并讨论了服务组合的实际案例。     

基于工作过程的Web应用程序设计课程研究与开发

文章以Web应用程序设计课程为例,探讨了基于工作过程的教学方式如何对这门课程进行建设,介绍了基于工作过程系统化思路进行课程改革的尝试,阐述了课程设计具体实施内容,包括岗位职业能力的分析、知识点分析、学习情境的设计、教学设计、教学实施等内容。     

Linux环境中Web服务器的配置与优化

文章详细讲解了在Linux操作系统中如何配置和优化Web服务器,希望为后续的技术应用奠定坚实基础。