Judul: Analisis Hubungan Suhu Permukaan, Evaporative Fraction, dan Bowen Ratio dengan Hotspot sebagai Indikator Kebakaran Lahan
Abstrak: Landfire is a burning incident that swoop down the vegetation area. Landfire in Indonesia has been an annual incident specially in Sumatera and Kalimantan. Landfires often symbolized with hotspots in that area, because that hotspots generalized with the firespots if looked by remote sensing method. The differentiation parameters were parameter from convertion metadata Landsat 8 with resolution 1 km x 1 km. This resolution used for generalize with the resolution of MODIS fire data that is 1 km x 1km. The two of image data are from 2013 in path/row 126/61. Using parameter surface temperatures (TS), Bowen ratio (β), and evaporative fraction (EF). The result from relation between TS and hotspot is the climb down trend with R2 5.42%. While the result from relation between EF dan hotspot is the climb down trend with R2 4.94% and the result from relation between β and hotspot is the climb up trend with R2 6.31%. The result of t-test and F-test between these parameters and hotspot is these parameters can’t used alone to estimated hotspot. Because for estimating hotspot can’t use only these parameters but the others too.
Keyword: Bogor Agricultural University (IPB), surface temperature, hotspot, evaporative fraction, bowen ratio

Judul: Hubungan antara Titik Panas dengan Perubahan Penutupan/ Penggunaan Lahan (Studi Kasus: Kabupaten Kapuas, Provinsi Kalimantan Tengah)
Abstrak: Land and forest fires in Indonesia have become a serious problem since 1982/1983. Annually the area that was burned widespread, which is caused by the increasing number of forest converted to plantations, agriculture, settlements, and so forth. Indicator commonly used for early detection of forest and land is hotspots, obtained from a meteorology satellite remote sensing. The objectives of this research are to analyze the distribution pattern of hotspots in Kapuas District, analyzed land cover/use change in Kapuas District, analyzed the relationship between hotspots and land cover/use change in Kapuas District, and analyzed the relationship hotspots and rainfall anomaly in Kapuas District. The maximum distribution of hotspots during 2005 to 2011 was indicated in 2006 and 2009; it was expected because of the effect of long term dryness (El-Nino), so the intensity of the fire increased. During 2005 to 2011, many hotspots identified in shrub swamps, shrub, plantations, secondary swamp forest, and secondary upland forest. Hotspots are identified on the site, possibly due to a fire caused by the preparation of agriculture or plantation. It is marked by an increase in land cover change to plantation up to 49.5%, while the secondary swamp forest and secondary upland forest decreased up to 19.2% and 7.83%. The rainfall anomaly is also expected to be able to affect the number of hotspots. When rainfall in the condition of subnormal, then hotspot identified more than when rainfall was above normal.
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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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