Judul: XML retrieval untuk dokumen Bahasa Indonesia
Abstrak: XML (eXtensible Markup Language) retrieval is the content based retrieval of documents structured with XML and aims to implement focused retrieval strategies aiming at returning document components, which is XML elements instead of whole documents in response to a user query. Query languages for XML retrieval can be classified into content only (CO) and content and structure (CAS) query languages. Content only queries usually used for information retrieval where user does not know structure of a document but can get a specific answer from the query. Whereas, for content and structure queries used for XML retrieval systems which aims to answering user query on retrieve specific part of a document from content and structure XML documents. In this research queries are use content and structure (CAS) character with XML query additional fragments tagging of documents structured with XML. The purpose of this reasearch is to implement XML retrieval for document in Bahasa Indonesia using XML query additional fragments tagging with SIMNOMERGE similarity. The testing used 2 documents i.e. agricultural document and medicinal plants document. For the testing agricultural documents used 30 queries and 1000 documents. Whereas for medicinal plants documents used 13 queries and 93 documents. The testing result showed that the perfomance of information search engine is better when we use the medicinal plants documents than agricultural document. However, the performance of search engine with XML query additional fragment tagging with content and disease in madicinal plants document gave good result with around 0.8589 average precision and for XML query additional fragment tagging with text in agricultural document gave result with around 0.6156 average precision
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Judul: Information Retrieval for RSS News Document in Bahasa Indonesia.
Abstrak: RSS (Really Simple Syndication) is a language derived from XML (Extensible Markup Language). The use of RSS as a syndication on Indonesian news sites has become widespread, as well as a syndicated news by news websites will continue to evolve in time, so it requires a search facility that can return information that explore the RSS data efficiently and effectively. Several studies have been conducted related to information retrieval, one of it was developed by Rahman (2006) which measured performance and compared the equality of returned XML document. This research tries to implement the information retrieval using VSM (Vector Space Model) to build an RSS search facility and to analyze and compare the effects of the use of additional title weighting with normal weighting. Test results show that the use of the normal weighting performs better than the use of weighting in the title. This is explained by the average precision value gotten from the test. At recall levels between 10% until 30% the average precision has the same value, at recall level 60% the average precision value of title weighting is higher than normal weighting, but between 40%, 50%, 70% until 100% the normal weighting precision is greater that of the title weighting. Keywords: Information Retrieval, RSS, Vector Space Model.
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Judul: Bifurkasi Hopf pada Model Siklus Bisnis Kaldor Kalecki tanpa dan dengan Waktu Tunda
Abstrak: Business cycle model is one of dynamical system models in economic. One of the business cycles model is Kaldor-Kalecki model. Kaldor-Kalecki business cycle model that is written in delayed defferential equations, is a business cycle model that involves gross product and capital stock of a company. In this paper Kaldor-Kalecki business cycle model is analyzed using both nondelay and delay in time of capital stock. By Taylor expansion for the time delayed model, an analysis of stability around the fixed points has been done. Furthermore, by using Hopf bifurcation theorem, it can be shown that there exists periodic orbits and limit cycle. In the nondelayed model, changing the parameter of goods market could lead to the occurrence of Hopf bifurcation and the existence of limit cycle. Similarly, for the delayed model, it has been shown that changing the time delay parameter may result in the occurrence of Hopf bifurcation and limit cycle.
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