Judul: Perbandingan fenologi dekomposer pada empat tipe ekosistem yang berbeda
Abstrak: Hutan sebagai salah satu bentuk ekosistem memiliki peranan yang sangat penting bagi kehidupan fauna tanah. Fauna tanah memiliki peranan dalam proses dekomposisi. Proses dekomposisi sangat penting dalam menyediakan unsur hara guna pertumbuhan pohon. Penelitian ini bertujuan untuk menghitung kelimpahan fauna tanah, mengetahui jenis yang mendominasi pada setiap ekosistem dan laju dekomposisi pada setiap ekosistem. Kelimpahan fauna tanah rata-rata dan kekayaan jenis rata-rata tertinggi terdapat pada ekosistem Oil Palm Plantation. Tingginya kelimpahan fauna tanah pada suatu ekosistem dapat dipengaruhi oleh kondisi habitat. Keragaman jenis rata- rata dan kemerataan jenis rata- rata tertinggi terdapat pada ekosistem Rubber plantation. Kesamaan jenis tertinggi terdapat pada ekosistem Oil Palm Plantation dengan Rubber plantation. Laju dekomposisi sangat dipengaruhi oleh jumlah individu yang ditemukan pada setiap ekosistem. Pada ekosistem Rubber plantation mengalami penurunan laju dekomposisi tercepat. Jenis Collembola, Acarina dan Formicidae diduga memiliki peranan paling penting dalam proses dekomposisi. Jenis yang mendominasi pada setiap ekosistem terdiri dari Homidia sp, Dermacentor sp, Polydesmus sp, Gulumna sp, Freyana sp serta beberapa jenis semut dan rayap.Keberadaan dari masing-masing individu sangat dipengaruhi oleh beberapa faktor iklim diantaranya suhu dan kelembaban.
Keyword: Collembola, decomposition, decomposition rate, fauna of soil

Judul: Komunitas Fauna Tanah Pada Empat Tipe Ekosistem yang Berbeda.
Abstrak: Deforestation or changes in the function from forest to non-forest ecosystems has been playing a role in the change of ecosystem and species in it. Soil fauna is one of is an interesting aspect to be studied. This experiment was conducted in Bungku, District Bajubang, Batanghari Regency, Jambi. Sampling technique using hand sorting method in fourth ecosystem. The fourth ecosystem mentioned is secondary forest (BF), jungle rubber (BJ), oil palm plantations (BO), and rubber plantations (BR). The results found there were 271 individuals are included in 43 familys, 19 orders from 7 class i.e. Insecta, Chilopoda, Collembola, Clitellata, Malacostraca, Arachnida, and Diplopoda, with 2 phylum i.e. Arthropoda and Annelida. Secondary forest is an ecosystem that relatively stable with the value of diversity index H '= 2.50, index of richness DMg = 5.05, and index of evenness E = 0.81. General distribution pattern on the four ecosystems is uniform, with Id value <1. The high diversity of soil macro-fauna was related with soil fertility.
Keyword: Jungle rubber, oil palm plantation, rubber plantation, secondary forest, soil fauna

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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