Judul: Pemodelan Spasial Kesesuaian Habitat Lutung Jawa (Trachypithecus auratus Geoffroy, 1812) di Resort Rowobendo Taman Nasional Alas Purwo
Abstrak: One of the Ebony leaf monkey habitat is Rowobendo Resort in Alas Purwo National Park. The research objectives are mapping habitat suitability, to identifying factors which highly influence habitat suitability and to determining area of Ebony leaf monkey habitat suitability. Ebony leaf monkey habitat suitability mapping was initiated by collection data, such as digital map, data survey and literature. This mapping was based on some habitat variables, namely NDVI, altitude, slope, distance from road, distance from river, and distance from village. The value from each points then being analyzed by using principal component analysis (PCA) to get the weight of each variable. Habitat suitability model of ebony leaf monkey was Y = (1.189*FkNDVI) + (2.546*Fkaltitude) + (1.058*Fkslope) + (1.058*Fkriver) + (2.546*Fkroad) + (2.546*Fkvillage). The habitat suitability map were reclassified into three suitability classes. The result showed that there were 953.60 ha of low habitat suitability, 1899.35 ha of medium habitat suitability, 859.43 ha of high habitat suitability. The habitat suitability map could be accepted by showing the validation about 87,10%.
Keyword: spatial modelling, habitat suitability, ebony leaf monkey

Judul: Mapping the Habitat Suitability of the Javan Langur (Trachypithecus auratus Geoffroy, 1812) in the Mount Gede Pangrango National Park
Abstrak: Lutung jawa (Trachypithecus auratus) merupakan satwa endemik Indonesia yang dapat ditemukan di Taman Nasional Gunung Gede Pangrango (TNGGP) dan saat ini memiliki status konservasi rentan. Salah satu upaya konservasi untuk menjaga populasi satwa ini yaitu dengan studi kesesuaian habitat. Penelitian ini bertujuan untuk mengetahui komponen yang mempengaruhi sebaran lutung jawa dan kesesuaian habitatnya di TNGGP. Analisis yang digunakan pada variabel lingkungan yaitu analisis multikolinearitas dan pembangunan model kesesuaian habitat diolah dengan Maximum Entropy. Hasil menunjukkan bahwa komponen habitat dengan peluang kehadiran lutung jawa paling tinggi berada pada habitat yang dekat dengan primata lain dan lokasi wisata, berada pada hutan dengan kerapatan hutan tinggi, ketinggian kanopi 26 m, ketinggian tempat 700 mdpl, kelerengan agak curam (17%), memiliki jarak 110 m dari sungai, 4500 m dari perkebunan, 150 m dari semak belukar, serta 500 m dari pemukiman atau lahan terbangun. Hasil pemodelan di TNGGP menunjukkan terdapat kawasan seluas 589,54 ha sangat sesuai, 1.080,35 ha sesuai, 2.533,31 ha cukup sesuai dan 20.075,64 ha kurang sesuai., Javan langur (Trachypithecus auratus) is an endemic species in Indonesia that can be found in the Mount Gede Pangrango National Park (TNGGP) and currently classified as vulnerable. The way to maintain this species population is identify the suitability of its habitat. This research aims to identify the factors that affect distribution of javan langur and their habitat suitability in TNGGP. Environmetal variable was analyzed using multicollinearity analysis and habitat suitability model build using Maximum Entropy. The results show that the habitat components with the highest probability of javan langur presence are habitats that close to other primates and tourist sites, and near from forests with high forest density, an forest canopy height of 26 m, an elevation of 700 masl, moderate steep slope (17%), a distance of 110 m from rivers, 4.500 m from plantations, 150 m from shrubland, and 500 m from settlements and built-up land. The modeling results indicate there are areas of 589,54 ha that are highly suitable, 1.080,35 ha that are suitable, 2.533,31 ha that are moderately suitable, and 20.075,64 ha that are less suitable in TNGGP.
Keyword: habitat, habitat suitability, javan langur, modeling

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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