Judul: Uji Antagonis Trichoderma harzianum terhadap Rhizoctonia sp. Penyebab Penyakit Hawar Daun pada Jabon (Anthocephalus cadamba (Roxb.) Miq.) secara in Vitro
Abstrak: Jabon (A. cadamba) merupakan salah satu jenis pohon cepat tumbuh yang diminati oleh industri kayu lapis dan industri pulp dan kertas karena riapnya yang besar dengan daur yang pendek. Salah satu penyakit yang menyerang tanaman Jabon adalah hawar daun (leaf blight) yang disebabkan oleh Rhizoctonia sp. Penelitian ini menggunakan jamur antagonis T. harzianum dengan tujuan untuk mengetahui potensi penghambatan pada aktifitas Rhizoctonia sp. pada media PDA (Potatos Dextrose Agar) dan PFA (Potatos Fructose Agar) sebagai media padat serta PDB (Potatos Dextrose Broth) dan PFB (Potatos Fructose Broth) sebagai media cair yang digunakan untuk uji antagonis. Analisis data yang digunakan yaitu RAL (Rancangan Acak Lengkap) in time untuk isolat yang ditumbuhkan pada media padat dan RAL faktorial untuk isolat yang ditumbuhkan pada media cair. Hasil uji Duncan menunjukkan bahwa media-media yang digunakan tidak berpengaruh nyata terhadap penghambatan aktifitas Rhizoctonia sp. oleh T. harzianum dimana tingkat penghambatan pada metode langsung di media PDA (79.38%) lebih tinggi daripada di media PFA (69.10%).
Keyword: Jabon, Rhizoctonia sp., Trichoderma harzianum, media, RAL

Judul: Uji Antagonis Trichoderma harzianum terhadap Botryodiplodia sp. Penyebab Penyakit Mati Pucuk pada Jabon (Anthocephalus cadamba) secara in Vitro
Abstrak: Frenquently issues emerge on jabon (A. cadamba) plantations development is Botryodiplodia sp. aggression that cause dieback desease. Biology control is necessary as effort to hamper pathogen growth with lowest environmental contamination risk compared to non biological control. One of biological control configuration is using biological control agent T. harzianum the research supposed to acquire T. harzianum potency as biological control agent against Botryodiplodia sp.. In this research antagonist examination using direct method (dual culture) and indirect method (filtrate T. harzianum). Experiment model is using completely randomize design and in time completely randomize design. This research result shows that T. harzianum disposal in antagonist examination on direct mothode and indirect method against Botryodiplodia sp. growth. This case shows that T. harzianum has potency to against Botryodiplodia sp. growth. So that could be used as biological desease control on jabon (A. cadamba) especially caused by Botryodiplodia sp..
Keyword: Bogor Agricultural University (IPB), antagonistic examination, Trichoderma harzianum, Botryodiplodia sp

Judul: Implementation of Spatio-Temporal Change Query in Relational Database.
Abstrak: Geographic object changes in various views. Object changes are recorded using a model of static storage. No historical connection between old version data and new version data has been built. For that, a storage model of spatio-temporal queries that can analyze spatio-temporal changes has been developed. The object changes the geometry are grouped according to the taxonomy of Spatio-Temporal Pattern Change. This research has been able to apply the query patterns change including born, expand, merge, contract, split, normal and die. This query based on geometric (area) changes. The implementation of spatio-temporal change queries represents an object changes continuously with easy, change detection is done by comparing two versions of data. Keyword: spatio-temporal change query, spatio-temporal change pattern.
Keyword: