Judul: Ekspansi Kueri Menggunakan Metode Semantic Similarity Retrieval Model (SSRM)
Abstrak: The main objective of this study was to applied the method of semantic similarity in the proccesed of query expansion in information retrieval systems in the Indonesian language. Selection of partners in selecting candidates expansion will be used phrase pairs that have been made In research Kartina (2010) in which the phrase pairs with the largest value of similarity between the words that will be selected. Used by 10 groups of queries not clear who obtained manually and 30 groups of queries in 2000 agricultural document, document search results will be compared with the addition one-term of expansion, two-term of expansion, and three-term of expansion. The results of this study suggest five things. The first that the expansion of the query by added one term produces better results than the addition of two terms and three terms. The second that query expansion used by 10 groups of queries produces a higher precision values than using 30 groups of queries. The third that the used of the semantic similarity method produces better performance than the use of a thesaurus on the method of similarity retrieval Vektor Space Model (VSM). The fourth that the used of semantic similarity methods have not been able to produce better performance than the used of the method of conditional probabilities in the selection of expansion terms resulting from the translation of bilingual dictionary. The fifth that the used of the phrase paired in determining the candidate expansion terms can not maximize the search results using the method of semantic similarity of documents, because each pair selected does not necessarily have a semantic relationship with a given query.
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Judul: Ekspansi Kueri pada Sistem Temu Kembali Informasi Berbahasa Indonesia menggunakan Kamus Dwibahasa
Abstrak: The most frequent problem on information retrieval is the users inability in representing information they need, in a query form. Thus, one of the solutions to overcome such situation is by applying query expansion technique. By applying the method, query will be expanded, and the new query produced will be used to do the search task. One of the approaches in determining the term of the expansion is Translation with Bilingualism Dictionary, which works through query translation process using dictionary, and the calculation of weight from each expanded candidate terms. In order to increase the relevance of the search result, this research uses Translation with Bilingualism Dictionary as the method to apply. Acknowledging the influence of the method, the research trial and error through the observation of the eleven recall precision number is applied to the produced retrieval result by using different expansion terms. Based on the observation of the produced precision number, it is identified that the use of Translation method in this research has not been successfull in increasing the relevance of the search results. The more expansion terms used, the smaller the precision number produced.
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Judul: Kontaminasi Logam Berat Pb dan Hg pada Ikan Nila (Oreochromis niloticus Linnaeus, 1758) Budidaya di Waduk Jatiluhur, Jawa Barat
Abstrak: Waduk Jatiluhur dimanfaatkan oleh masyarakat untuk budidaya ikan nila (Oreochromis niloticus). Meskipun begitu, waduk ini rentan terhadap limbah berbahaya dan beracun. Penelitian ini bertujuan menentukan kontaminasi kandungan logam berat timbal (Pb) dan merkuri (Hg) pada ikan nila yang dibudidayakan dan hubungannya dengan kualitas perairan di Waduk Jatiluhur. Analisis logam berat dilakukan dengan AAS. Kandungan logam berat tertinggi pada ikan nila adalah Hg pada ginjal yaitu 0,054 mg/kg. Kandungan logam berat tertinggi pada air yaitu Pb yaitu 0,263 mg/L. Nilai Bioconcentration Factor (BCF) untuk Pb dan Hg adalah 0,42 dan 211,11. Nilai MTI (Maximum Tolerable Intake) untuk orang dewasa (60 kg) untuk Pb dan Hg yaitu 16,67 kg/minggu dan 15,79 kg/minggu sedangkan pada anak-anak (15 kg) untuk Pb yaitu 4,17 kg/minggu dan 3,95 kg/minggu. Penelitian menunjukkan bahwa kadar DO dan timbal sudah tidak sesuai dengan baku mutu.
Keyword: air, ikan nila, logam berat, MTI, Waduk Jatiluhur