Judul: Pemetaan Kemiringan Lereng berbasis Data Elevasi dan Analisis Hubungan Antara Kemiringan Lereng dengan Bentuklahan.
Abstrak: Slope is part of a landform determined by various factors which derived from endogenic and exogenic geomorphic processes. Topographic map is one of the most frecuently used data for slope steepnes mapping. Elevation data from satellite record such as Shuttle Radar Topography Mission (SRTM) or others recently also used to build topographic data. The aim of this research are (1) slope steepnes mapping based on Indonesian Topographical Map (Rupa Bumi Indonesia or RBI) scale 1:25.000 and SRTM, and (2) landform mapping and analysis for landform and slope relationship. The Cileungsi Watershed was selected for research area since it has various landforms. Mapping method was done visually for printed RBI, whereas for digital RBI and SRTM data were done digitally using geographic information system software (ArcGIS). Stratified random sampling approach has been used for field work upon interpertated landform and slope analysis maps. The result show that the widest slope class in Cileungsi watershed was quite different for each method. By visual method mapping (printed RBI), the widest slope steepnes was B-class (32%), as for digital RBI was A-class (41%), and for SRTM data was C class (35%). To know where the similar slope steepnes classes having the same spatial location (overlap), the overlay processes have been done between 3 slope steepnes maps i.e. derived from printed-RBI, digital- RBI, and digital-SRTM. By these operations, it reveal that the average of overlap area were 38% for visual-RBI vs. digital-RBI, 50% for digital-SRTM vs. digital- RBI, and 59% for digital-SRTM vs. visual-RBI. Thus, the latter comparasion indicated the better one in common results. Geomorphologically, Cileungsi watershed composed by 17 types of landforms where the denudational-claystone hills, was the widest landforms in study area (18,18%). In relation to the slope steepnes, the morphography of plains were generally characterized by A and B slope steepnes classes; for the river valley, such as floodplain & terraces were characterized by A-class, but for the river valley of upper slopes (in hilly and mountainous areas) were characterized by C and D-classes. For hills morfography, the characterized of dominant slope varies from B to D-classes and so did for mountains morfography. However the typical characteristic of hilly or mountainous landforms were the heavier of incision the greater of slope steepnes class.
Keyword: Bogor Agricultural University (IPB), topographic map (RBI)., SRTM Indonesia, slope, landform, Cileungsi watershed

Judul: Analisis data landsat ETM+ untuk kajian geomorfologi dan penutup/penggunaan lahan dan pemanfaatannya untuk pemetaan lahan kritis di Kota Cilegon
Abstrak: Excessive activity of land or soil management could have impacts in the form of soil damage and creation of critical land. Such condition occurs in nearly all areas of Indonesia, including Cilegon city. Land is categorized as critical, if at present, it is not productive or not sufficiently productive, from the point of view of agricultural use, because its management and use has insufficient or no consideration on soil conservation principles. Critical land could disturb ecological balance which results in reduction of environmental quality, and further economic disturbance toward the community. The objectives of this research were: 1) analyzing the data of Landsat ETM+ for study of geomorphology and land cover/land use, 2) identification and mapping of critical land, 3) studying the cause of critical land occurrence in its relation with land form and land use, and 4) providing recommendation for reducing the damage on environmental carrying capacity or for reducing critical land. Method of critical land determination referred to that of Departemen Kehutanan RI, (2003) whereas the calculation was performed by overlay analysis with Geographic Information System (GIS). Based on analysis of Landsat ETM+ Imagery, it was obtained that, combination of band 452 constituted the best combination for geomorphological study, whereas combination of band 542 constituted the best combination for study of land cover/land use. Based on calculation of determining factors for critical land, which comprise land cover/land use, slope, erosion level, and land management condition in the research area, the following results were obtained: 1.977 Ha (10,98%) was categorized as critical land, 639 Ha (3,55%) was categorized as somewhat critical, 5.197 Ha (28,87%) was potentially critical, and 10.189 Ha (56,80%) was non critical land. Factors which had much influence on the occurrence of critical land in the research area were morphology of land form (slope), types of land use (mixed garden/dry land farm), and low quality management of land (soil and water conservation practice). Therefore, critical land area occurred much on land form of denudational volcanic cone of Gunung Gede (KVDG), denudational volcanic cone of Gunung Cidanau (KVDC) and denudational volcanic hill (PVD) which had slopes ranging from steep to very steep. Based on field observation results, impacts of industrial activities (gases and chemical wastes) contributed directly and indirectly to the occurrence of critical land. Research on this problem should be conducted further in other occasion. Key words: Landsat ETM+, Geomorphology, Geographic Information System, Land form, Land use, Critical Land.
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Judul: Application of Bacteriophage Cocktail for the Control of Vibrio parahaemolyticus Infection in Pacific White Shrimp Litopenaeus vannamei
Abstrak: Bakteriofag diketahui dapat menjadi alternatif dari penggunaan antibiotik dalam kegiatan akuakultur. Penelitian ini bertujuan menguji penggunaan koktail bakteriofag untuk pengendalian infeksi bakteri V. parahaemolyticus pada udang vaname. Penelitian dilakukan menggunakan rancangan acak lengkap yang terdiri dari lima perlakuan dengan masing-masing tiga ulangan yang meliputi perlakuan K-: Pemeliharaan udang tanpa bakteriofag dan tanpa uji tantang, K+: Pemeliharaan udang tanpa bakteriofag dengan uji tantang, KB: Pemeliharaan udang dengan aplikasi bakteriofag dan tanpa uji tantang, B1: Pemeliharaan udang dengan aplikasi bakteriofag satu jam sebelum uji tantang, dan B2: Pemeliharaan udang dengan aplikasi bakteriofag satu jam sebelum dan bersamaan dengan uji tantang. Dosis uji tantang V. parahaemolyticus adalah 104 CFU mL-1 . Udang dengan bobot 0.83±0.05 g dipelihara selama tujuh hari dengan padat tebar 32 ekor per 20 L air. Koktail bakteriofag digunakan sebesar 5 × 105 PFU mL-1 (B1) dan 106 PFU mL-1 (B2), sehingga diperoleh nilai multiplicity of infection (MOI) sebesar 50 (B1) dan 100 (B2). Parameter yang diamati yaitu survival, kelimpahan bakteri V. parahaemolyticus, total haemocyte count, aktivitas fagositik, phenoloxidase, respiratory burst, dan parameter kualitas air. Aplikasi koktail bakteriofag pada media pemeliharaan mampu menekan pertumbuhan V. parahaemolyticus, meningkatkan respons imun dan meningkatkan survival udang vaname hingga mencapai 97.9±1.80%.
Keyword: Antibiotics, bacteriophages, immune response, pacific white shrimp, Vibrio parahaemolyticus