Focused crawler is a Web crawler that tries to download only pages that are relevant to a given topic of interest (Siemiński 2009, Almpanidis 2011). That is to say, it is necessary for focused crawler to calculate relevance between pages and specific topic (Rungsawang, 2005). Recently, the specific topic involving spatial information especially toponyms such as the topic about the Diaoyu Island...

Nowadays, the size of the Internet is experiencing rapid growth. As of December 2014, the number of global Internet websites has more than 1 billion and all kinds of information resources are integrated together on the Internet , however,the search engine is to be a necessary tool for all users to retrieve useful information from vast amounts of web data. Generally speaking, a complete search e...

Search engines are the tools for Web site navigation and search. Search engines maintain indices for web documents and provide search facilities by continuously downloading Web pages for processing. This process of downloading web pages is known as web crawling. In this paper we propose A neural network based change detection method in migrating parallel web crawler. This method for Effective M...

With the advance of the World-Wide Web (WWW) technology, people can easily share content on the Web, including geospatial data and web services. Thus, the “big geospatial data management” issues start attracting attention. Among the big geospatial data issues, this research focuses on discovering distributed geospatial resources. As resources are scattered on the WWW, users cannot find resource...

A focused crawler downloads web pages that are relevant to a user specified topic. Most of the existing focused crawlers are keyword driven and do not take into account the context associated with the keywords. This leads to retrieval of a large number of web pages irrespective of the fact whether they are logically related. Thus, the keyword based strategy alone is not sufficient for the desig...

A search engine, like Google, is built using two pieces of infrastructure a crawler that indexes the web and a searcher that uses the index to answer user queries. While Google's crawler has worked well, there is the issue of timeliness and the lack of control given to end-users to direct the crawl according to their interests. The interface presented by such search engines is hence very limite...

Information interoperatbility has received increased attention since the growing popularity of the Internet, the Web and distributed computing infrastructures. During this evolution, the attention on semantics and ontologies to achieve this interoperatbility has also increased. The same thing is happening on the Semantic Web, where ontologies are used to assign (agreed) meaning to the content o...