Judul: Kajian Laju Deforestasi dan Degradasi Hutan Di Kabupaten Lamandau dan Kotawaringin Barat Provinsi Kalimantan Tengah
Abstrak: Issue of deforestation and forest degradation has been attracting the international and national community’s attention. This study was performed to identify rate and driving force of deforestation and degradation occurred in Lamandau and Kotawaringin Barat, Central Kalimantan Province. The study objective is to identify the rate and driving forces of deforestation as well as forest degradation using medium resolution image, Landsat TM. The classification method used to detect and analyze deforestation and forest degradation was visual interpretation, then followed by thematic change technique. Identification of deforestation and forest degradation driving force was done using a depth interview. The results of study show that the deforestation rate during the period of 1990-2013 is 56 408.3 ha/year, while forest degradation rate is 36 195.0 ha/year. The main driving forces of deforestation and forest degradation are opening up forest for road constructions, settlement establishment, estate crop and agriculture development. The major agents of deforestation and forest degradation are local community contributing of approximately 10%, while the rest was contributed by estate crop company (palm oil company).
Keyword: visual interpretation, thematic change, driving force, forest degradation, deforestation, Bogor Agricultural University (IPB)

Judul: Pendugaan Perubahan Cadangan Karbon di Kabupaten Lamandau dan Kabupaten Kotawaringin Barat, Provinsi Kalimantan Tengah.
Abstrak: Deforestation and forest degradation has been a world attention due to their contribution on the global warming. This study describes the estimation of carbon stock changes caused by forest and land cover change using thematic approach. Carbon stock changes was analyzed and detected by using thematic change technique and multi-temporal image analysis. This research focused on carbon stock changes and emissions of CO2 due to land cover changes in Lamandau and Kotawaringin Barat Regency, Central Kalimantan Province. The main objective of this research is to estimate carbon stock changes and emissions of CO2 in Lamandau and Kotawaringin Barat Regency, Central Kalimantan Province during the period of 1990-2000 and 2000-2013. The result of this study indicates that there was a decrease in carbon during the period of 1990-2013, having mean annual decrease of carbon stock at amount of 2 945 639 Mg/year or equivalent to the loss of forest (deforestation) area of 23 986.6 ha/year and forest degradation area of 2 442.4 ha/year or equivalent to emission of 1 878 549 car/year.
Keyword: degradation, deforestation, multi temporal image analysis, carbon stock, land cover change, Bogor Agricultural University (IPB)

Judul: Hydroxyapatite-Chitosan Composite Coating on Stainless Steel 316 to Improve Corrosion Resistance
Abstrak: Metals that were used in bone implantation should have good corrosion resistance that were not easily corroded when implanted into the body. Metal corrosion resistance of stainless steel 316 can be enhanced through the metal coating by hydroxyapatite-chitosan composite with composition ratio of hydroxyapatite (gram) and chitosan 3% (mL) 0.2:0, 0.2:0.1, 0.2:0.5, 0.2:1.0, and 0.2:1.5. Besides improving the corrosion resistance of metal, the presence of chitosan also maintain the position of hydroxyapatite on metal surfaces. Corrosion resistance increases with increasing amount of chitosan added and the best composition of hydroxyapatite-chitosan composite was 0.2:1.0.
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