Judul: Pendugaan nilai komponen neraca energi di kanopi hutan tanaman agathis loranthifolia dengan menggunakan satelit optik (Studi kasus Hutan Gunung Walat Sukabumi)
Abstrak: The process of absorption, reflection and transmission of radiation at the plant area will cause changes in the spectrum of solar radiation at the top, middle and bottom canopy (June, 1993). Next Odum (1970) suggests that many plants that grow in the shade of other plants which will be the quality of different spectral direct solar radiation, which causes a reduction in the amount of radiation received by the leaf surface compared with those leaves receiving direct solar radiation. This situation has important implications for the plants that grow beneath a thick canopy such as: the plants in the forest floor. This study tries to apply satellite remote sensing techniques and combined with the capture of field data have been processed before by using GLA software (Gap Light Analyzer) to estimate the value of the transmitted radiation by the canopy of plants. Value of net radiation received by the canopy of the forest areas of 51 Wm-2, the value of short-wave radiation reflected by the canopy of the forest areas of 48 Wm-2. The value range of the transmitted radiation calculations using GLA software is for 19% of short-wave radiation coming. This value is the direct radiation into the forest canopy with no obstructed by canopy cover. Determining the value of the transmitted radiation is strongly influenced by the quality of the image so that the required use of digital cameras that have lenses with a high acuity.
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Judul: Pendugaan nilai komponen neraca energi di kanopi hutan tanaman agathis loranthifolia dengan menggunakan satelit optik: studi kasus hutan gunung walat Sukabumi
Abstrak: Proses penyerapan, pemantulan dan penerusan radiasi pada areal tanaman akan menyebabkan terjadinya perubahan spektrum dari radiasi matahari di puncak, tengah dan dasar tajuk (June, 1993). Selanjutnya Odum (1970) mengemukakan bahwa banyak tanaman yang tumbuh di bawah naungan tanaman lain dimana akan terjadi adanya kualitas spektrum berbeda dengan radiasi surya langsung, sehingga mengakibatkan pengurangan jumlah radiasi yang diterima oleh permukaan daun dibandingkan dengan daun tersebut menerima radiasi surya langsung. Keadaan ini mempunyai implikasi yang penting untuk tanaman-tanaman yang tumbuh di bawah kanopi tebal seperti : tanaman–tanaman di dasar hutan. Penelitian ini mencoba menerapkan tehnik penginderaan jauh satelit dan menggabungkannya dengan pengambilan data di lapangan yang telah diolah sebelumnya dengan menggunakan software GLA (Gap Light Analyzer) untuk pendugaan nilai radiasi yang ditransmisikan oleh kanopi tanaman. Nilai radiasi netto yang diterima oleh kanopi hutan wilayah kajian sebesar 51 Wm-2, nilai radiasi gelombang pendek yang dipantulkan oleh kanopi hutan wilayah kajian sebesar 48 Wm-2. Nilai kisaran hasil perhitungan radiasi yang ditransmisikan dengan menggunakan perangkat lunak GLA adalah sebesar 19% dari radiasi gelombang pendek yang datang. Nilai ini merupakan radiasi langsung yang masuk ke dalam tajuk hutan tanpa terhalang oleh tutupan kanopi. Penentuan nilai radiasi yang ditransmisikan sangat dipengaruhi oleh kualitas foto sehingga diperlukan penggunaan kamera digital yang memiliki lensa dengan ketajaman yang cukup tinggi.
Keyword: Radiation, Energy balance, Gap light analyzer

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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