Judul: Sifat Fisis dan Keawetan Kayu Mindi (Melia azedarach L.) dari Rayap Cryptotermes cynocephalus setelah Perlakuan Pemanasan Minyak Jatropha curcas
Abstrak: Kayu mindi (Melia azedarach L.) adalah salah satu jenis kayu cepat tumbuh yang potensial sebagai bahan baku di industri kayu. Kayu mindi memiliki keawetan yang rendah sehingga perlu didukung dengan proses pengawetan. Penelitian ini bertujuan untuk mengevaluasi pengaruh perlakuan pemanasan dalam minyak jarak pagar (Jatropha curcas) terhadap sifat fisis dan keawetan kayu mindi (Melia azedarach) dari rayap kayu kering (Cryptotermes cynocephalus). Kayu mindi diberi perlakuan rendaman dingin dan panas dalam minyak jarak pada suhu 120 °C, 150 °C dan 180 °C. Waktu rendaman panasnya adalah selama 1 dan 3 jam. Hasil penelitian ini menunjukkan bahwa perlakuan minyak jarak tersebut meningkatkan stabilitas dimensi kayu mindi. Kadar air, kerapatan dan stabilitas dimensi kayu mindi yang dipanaskan dengan minyak jarak selama 3 jam pada suhu 180 °C nyata lebih baik dibandingkan dengan perendaman dingin maupun pemanasan minyak jarak selama 1 jam. Keawetan kayu mindi terhadap serangan rayap kayu kering meningkat setelah pemanasan dengan minyak jarak dengan suhu 180 °C selama 1 jam atau selama 3 jam.
Keyword: kayu mindi, keawetan kayu, minyak jarak pagar, perlakuan pemanasan, sifat fisis

Judul: Sifat Fisis, Sifat Mekanis, dan Sifat Finishing Kayu Mindi (Melia azedarach L.) setelah Perlakuan Pemanasan
Abstrak: Mindi (Melia azedarach L.) is a fast-growing wood species which is quite prospective for wood industry but it should be supported with proper technology application to produce good quality wood products. This research was done to evaluate the effect of heating treatment with various times and temperatures on the physical, mechanical, and finishing properties of mindi wood. Wood heating in oven and oil were at temperatures of 120 °C, 150 °C, and 180 °C for 2, 5, and 8 hours. The results showed that the heating wood in various conditions increased wood dimensional stability in both tangensial and radial directions. The moisture content, density, and dimensional stability of wood heated in oil were better than those heated in oven. Heating at 180 °C reduced the mechanical properties of mindi wood. The finishing test with cross cut methode showed that the oven heating did not affect finishing quality, except the 8 hours oil heating at 180 °C that reduced the finishing quality.
Keyword: physical properties, mindi wood, mechanical properties, heat treatment, finishing peroperties

Judul: Query Expansion based on Bilingual Dictionary Using Conditional Probability
Abstrak: Query expansion is a technique that can be used to bridge vocabulary gaps between queries and documents in the collection. With query expansion, user will be helped to formulate queries well so that user will optimize the search result. In this study, the expansion term was resulted from the translation of bilingual dictionary. Subsequently, several terms of expansion were elected based on the closeness of its relationship with the original query. This research showed that conditional probability can be used to select expansion term in bilingual translation method query expansion. The result of 1000 documents was more than 97% relevan document can be retrieved by this system. The more expansion term used, the larger number relevan document was retrieved.
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