Basis Token Consistency: A Practical Mechanism for Strong Web Cache Consistency

With web caching and cache-related services like CDNs and edge services playing an increasingly significant role in the modern internet, the problem of the weak consistency and coherence provisions in current web protocols is becoming increasingly significant and drawing the attention of the standards community [LCD01]. Toward this end, we present definitions of consistency and coherence for web-like environments, that is, distributed client-server information systems where the semantics of interactions with resource are more general than the read/write operations found in memory hierarchies and distributed file systems. We then present a brief review of proposed mechanisms which strengthen the consistency of caches in the web, focusing upon their conceptual contributions and their weaknesses in real-world practice. These insights motivate a new mechanism, which we call "Basis Token Consistency" or BTC; when implemented at the server, this mechanism allows any client (independent of the presence and conformity of any intermediaries) to maintain a self-consistent view of the server's state. This is accomplished by annotating responses with additional per-resource application information which allows client caches to recognize the obsolescence of currently cached entities and identify responses from other caches which are already stale in light of what has already been seen. The mechanism requires no deviation from the existing client-server communication model, and does not require servers to maintain any additional per-client state. We discuss how our mechanism could be integrated into a fragment-assembling Content Management System (CMS), and present a simulation-driven performance comparison between the BTC algorithm and the use of the Time-To-Live (TTL) heuristic.National Science Foundation (ANI-9986397, ANI-0095988

Perpetrators and Princesses: Transgression and Subject Formation in Killing Aurora and Queen Kat, Carmel and St. Jude Get a Life

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Knowledge web: realising the semantic web... all the way to knowledge-enhanced multimedia documents

The semantic web and semantic web services are major efforts in order to spread and to integrate knowledge technology to the whole web. The Knowledge Web network of excellence aims at supporting their developments at the best and largest European level and supporting industry in adopting them. It especially investigates the solution of scalability, heterogeneity and dynamics obstacles to the full development of the semantic web. We explain how Knowledge Web results should benefit knowledge-enhanced multimedia applications

The contribution of data mining to information science

The information explosion is a serious challenge for current information institutions. On the other hand, data mining, which is the search for valuable information in large volumes of data, is one of the solutions to face this challenge. In the past several years, data mining has made a significant contribution to the field of information science. This paper examines the impact of data mining by reviewing existing applications, including personalized environments, electronic commerce, and search engines. For these three types of application, how data mining can enhance their functions is discussed. The reader of this paper is expected to get an overview of the state of the art research associated with these applications. Furthermore, we identify the limitations of current work and raise several directions for future research

A Machine Learning Based Analytical Framework for Semantic Annotation Requirements

The Semantic Web is an extension of the current web in which information is given well-defined meaning. The perspective of Semantic Web is to promote the quality and intelligence of the current web by changing its contents into machine understandable form. Therefore, semantic level information is one of the cornerstones of the Semantic Web. The process of adding semantic metadata to web resources is called Semantic Annotation. There are many obstacles against the Semantic Annotation, such as multilinguality, scalability, and issues which are related to diversity and inconsistency in content of different web pages. Due to the wide range of domains and the dynamic environments that the Semantic Annotation systems must be performed on, the problem of automating annotation process is one of the significant challenges in this domain. To overcome this problem, different machine learning approaches such as supervised learning, unsupervised learning and more recent ones like, semi-supervised learning and active learning have been utilized. In this paper we present an inclusive layered classification of Semantic Annotation challenges and discuss the most important issues in this field. Also, we review and analyze machine learning applications for solving semantic annotation problems. For this goal, the article tries to closely study and categorize related researches for better understanding and to reach a framework that can map machine learning techniques into the Semantic Annotation challenges and requirements

The Politicization of Art on the Internet: From net.art to post-internet art

Este estudo tem como objetivo apresentar uma breve perspetiva sobre as manifestações socioculturais que se propagaram a partir do surgimento da Web; tendo como principal foco de análise o desenvolvimento da produção de Internet Arte na Europa e na América do Norte ao longo dos últimos 30 anos. Estruturado como um estudo de caso, três conceitos-chave fundamentam a base desta pesquisa: uma breve história da Internet, o desenvolvimento do termo hacker e a produção de arte web-based; da net.art até a Arte Pós-Internet. Em abordagem cronológica, estes campos serão descritos e posteriormente utilizados como guias para um final encadeamento comparativo que visa sustentar a hipótese da gradual dissolução de um ciberespaço utópico até o distópico cenário corporativo que constitui a Internet dos dias atuais.This study aims to present a brief perspective of the sociocultural manifestations that emerged after the Web birth, focusing on the development of Internet Art and the countercultural movements that emerged inside Europe and North America over the last 30 years. Under a case study structure, three fundamental subjects will be firstly explained: Internet history, the development of hacker concept and the web-based Art transformations: from net.art till Post-Internet Art. Chronologically described, these fields will lead to a final comparison of chained events that aim to sustain the hypothesis of the gradual dissolution of the early cyberspace utopias till the dystopic scene existent in nowadays Internet

Internet Jurisdiction Today

This paper will use the Yahoo case to illustrate the unique jurisdictional dilemma posed by the Internet as countries try to enforce their laws in an era when laws may be broken, through the use of the Internet, from other countries with conflicting laws.\u27 Part I of this paper will address the Yahoo case and its importance to Internet jurisdiction. Part II will explore traditional jurisdiction and apply it to the Yahoo case. Part III will identify twopotential theories of Internet jurisdiction and investigate whether they are feasible solutions to the problem posed by the Yahoo case. Part IV will examine an alternative to the proposals for Internet jurisdiction put forth in section II and IIU