Judul: Analisis Faktor Pendorong Perubahan Penutupan dan Penggunaan Lahan di Daerah Aliran Sungai Cimandiri dan Cibuni
Abstrak: North region West Java’s development around Jakarta is constantly accelerating. The development itself has caused many problems which are happening until today. However, the development in south region of West is very slow, although there are many potential land for development. Two watersheds which are located in south region, namely Cimandiri and Cibuni watershed are less developed than the watersheds in the north region of West Java. Therefore, supporting landscape planning to explore the watershed resources potential and landscape management to consider the environmental impacts for supporting the Low Carbon Societies (LCS) movement is needed. The purposes of this research are to analyze land use and land cover changes, and to determine the driving factor of the changes in Cimandiri and Cibuni watershed. The used methods are supervised classification and Logistic Regression Analysis (LRA). The results are land use map of Cimandiri and Cibuni watershed in 1978, 1995/6, and 2012. Farm field, forest, and bushes field are dominating in both watersheds. The driving factors for Cimandiri watershed show that there are four factors while there are three factors in Cibuni watershed that are significantly affecting land use and cover change.
Keyword: Bogor Agricultural University (IPB), Watershed Management., Land Use and Land Cover Change, Landsat Image, Geographic Information System

Judul: Analisis Perubahan Penutupan dan Penggunaan Lahan di DAS Ciliwung dan Cisadane
Abstrak: In this study, we examined the spatial and temporal patterns of land use and cover change (LUCC) and population change dynamics in the Northern Watershed of West Java. Those watersheds are Ciliwung and Cisadane. The objective of this study was to quantify the drivers of LUCC using long-term Landsat image data from 1978, 1995 and 2012. We found the changing of LUCC, especially in those watersheds boundary still continues since the growth of society and economy are increasing. Therefore, it needs a significance breakthrough to figure out the driver of LUCC of changing by using an easy and smart technology of Geographical Information System (GIS). A GIS gives the information about the driver of LUCC and at the same time monitoring the enviromental for minimizing some efforts of direct observation. The results show that the changing in those watersheds following several processes and in the end changed into settlements and dry lands, predominantly. The predicted drivers are number of population, density of population, soil type, slope, precipitation, and distance to city. The logistic regression analysis (LRA) by using forward stepwise model show that those drivers inclined to affect LUCC, respectively.
Keyword: Bogor Agricultural University (IPB), watershed management, Landsat image, Cisadane Watershed, Ciliwung Watershed

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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