Judul: Pemetaan Tingkat Kerawanan Pencurian Pohon Menggunakan Sistem Informasi Geografis di KPH Balapulang Perhutani Unit I
Abstrak: KPH Balapulang forestry is one of the companies run by Perhutani Unit I Central Java. One forest disruption occurs in KPH Balapulang the tree theft. Theft of trees can also threaten the sustainability of forest management and function. Geographic Information Systems (GIS) can help forest management. With the ability to build GIS spatial model. The purpose of this study itself are: making maps theft of trees, identifying factors that influence the theft of trees, and create a map of their vulnerability to theft trees. Map of tree theft is divided into five classes, namely tree thefts: low, pretty, medium, high, and very high. The factors that affect the distance the tree thefts, residential distance, age classes, and class slopes. Spatial model obtained the degree of vulnerability maps obtained tree theft is divided into five, namely: low-prone, quite vulnerable, being vulnerable, high-prone, and very vulnerable. Test the accuracy of the model produced Kappa values of 78,45% accuracy using the reference year 2008 and amounted to 65,69% using the reference year 2011
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Judul: Penggunaan Sistem Informasi Geografis Dalam Pemetaan Tingkat Kerawanan Pencurian Kayu Jati di KPH Mantingan Perhutani Divisi Regional I Jawa Tengah
Abstrak: Perhutani as the largest production forest managers in Java Island suffered many losses caused by timber theft. The objectives of this research are analyzing the rate of timber theft, identify the influence of biophysical factors to rate of timber theft vulnerability, identify the effect of biophysical factors of timber theft vulnerability, and create a map of timber theft vulnerability in KPH Mantingan. The method used in this research by Geographical Information System (GIS) analyze. theft occurred in 2010 with the number of loss as 2275 trees, BKPH Kalinanas was the region which have the highest average of timber theft as 632 trees/ year. Biophysical factors consist of age class, slope class, road distance and residential distance affect in timber theft as 11.25%. The accuracy test of vulnerability rate to timber theft get the value of Overall accuracy as 50.61% and Kappa accuracy as 28.15%. The rate of vulnerability to timber theft in KPH Mantingan divided in 3 classes namely low (2502.33 Ha), medium (10 970.44 Ha), and high (2924.98 Ha).
Keyword: Bogor Agricultural University (IPB), timber theft., mapping, KPH Mantingan, biophysical factor

Judul: Optimization of Alginate-Chitosan Microcapsules Formation for Leydig Cells Encapsulation
Abstrak: Hypogonadism is a clinical condition characterized by low concentrations of testosterone. It is caused by malfunction of Leydig cells in producing testosterone. Encapsulation method will protect the transplanted cells from the immune system rejection. The aims of this study was to optimize the formation of microcapsules for Leydig cells encapsulation. The microcapsules were made of alginate and chitosan as the first and the second coating agents, respectively. The result showed that the minimum concentration of alginate was 1.5% (w/v) with a viscosity of 33.8 cPs, resulted spherical microcapsules with diameters of 230-270 µm. The optimum concentration of chitosan as the second coating agent was 0.5% (w/v), resulted spherical microcapsule with mechanical stability in 4 hours. Leydig cells can be trapped inside the capsule with a density that proportional with concentration of cells used in the encapsulation.
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