Judul: Population Size and Spatial Distribution of Activity Tracks of Sun Bears (Helarctos malayanus, Raffles 1821) at the PBPH Area of PT Telaga Mas Kalimantan
Abstrak: Informasi tentang ukuran populasi dan sebaran yang menentukan keberadaan beruang madu diperlukan oleh PT. TMK sebagai salah satu bahan pertimbangan dalam merumuskan strategi konservasi keanekaragaman hayati khususnya beruang madu. Penelitian ini bertujuan untuk mengidentifikasi ukuran populasi dan sebaran spasial jejak aktivitas beruang madu serta hubungannya dengan karakteristik habitat di areal kawasan. Data dikumpulkan menggunakan metode album melalui camera trap, pengamatan jejak aktivitas dengan transek jalur dan analisis vegetasi. Data dianalisis ukuran populasi dengan menentukan jumlah individu yang teridentifikasi, menentukan sebaran jejak aktivitas secara spasial untuk menentukan pola sebaran, serta uji chi-square untuk menentukan hubungan antara sebaran jejak aktivitas beruang madu dengan karakteristik habitat. Berdasarkan hasil camera trap ukuran populasi didapatkan enam individu beruang madu dengan data persebaran 27 jejak aktivitas yang meliputi 26 cakaran dan satu bongkahan, tersebar secara mengelompok yang dipengaruhi oleh jarak dari sumber air dan kerapatan vegetasi pada tingkat pertumbuhan tiang., Information on population size and distribution that determine the presence of sun bears is needed by PT TMK as one of the considerations in formulating biodiversity conservation strategies, especially sun bears.. This study aims to identify the population size and spatial distribution of sun bear activity tracks and their relationship with habitat characteristics in the area. Data were collected using the album method through camera traps, observation of activity tracks with transect lines and vegetation analysis. Data were analyzed for population size by determining the number of individuals identified, determining the distribution of activity traces by spatial and morisita index, and chi-square test to determine the relationship between the distribution of sun bear activity traces and habitat characteristics. Based on the results of the camera trap population size, six sun bears were found with distribution data of 27 activity traces including 26 scratches and one chunk, scattered in groups influenced by distance from water sources and vegetation density at the pole growth level.
Keyword: Activity trace, habitat characteristics,, population size, spatial distribution, sun bear

Judul: Spatial Distribution of Traces of Sumatran Tiger Prey Activity in Pemerihan Resort Bukit Barisan Selatan National Park
Abstrak: Mengingat sulitnya penemuan jejak aktivitas harimau sumatera, maka keberadaan satwa mangsa menjadi salah satu indikator keberadaan dari harimausumatra tersebut. Keberadaan satwa mangsa sangat berpengaruh penting bagi harimau dalam membantu menjaga keseimbangan ekosistem. Penelitian mengenai satwa mangsa belum banyak dilakukan, sehingga penting untuk mengetahui sebaran dari satwa mangsa. Penelitian ini bertujuan untuk mengidentifikasi jenisjenis jejak aktivitas satwa mangsa, mengetahui sebaran spasial jejak aktivitas satwa mangsa, dan menganalisis hubungan antara jejak aktivitas dan karakteristikhabitat satwa mangsa harimau sumatera di Resort Pemerihan. Metode yangdigunakan adalah line transek pada petak 1.000 x 1.000 meter dengan 4 jalur pengamatan. Jenis jejak aktivitas satwa mangsa yang ditemukan meliputi tapakkaki, bekas pakan, sarang dan bekas-bekas aktivitas lainnya yang ditinggalkanoleh satwa mangsa. Bentuk sebaran spasial jejak aktivitas satwa mangsa mengelompok dengan nilai Ip (Indeks Morisita) sebesar 2,14. Hasil uji Chi-square menunjukkan terdapat hubungan antara jejak aktivitas dengan karakteristikhabitatnya, jejak aktivitas banyak ditemukan pada tipe tutupan lahan hutan primer dan sekunder dengan kelas kelerengan landai (8-15%), jarak yang ditemukandekat dengan sumber air <1000m dan berjarak 1000-2000m dari pemukiman., Given the difficulty of finding traces of sumatran tiger activity, the presence of pray animals is one indicator of the existence of the sumatran tiger. The existence of prey animals is very important for the Sumatran tiger to maintainthe balance of the ecosystem. Research on prey animals has not been done much, so it is important to know the distribution of prey animals. This study aims toidentify the types of traces of prey animal activity, determine the spatial distribution of traces of prey animal activity, and analyze the relationship betweenactivity traces and habitat characteristics of Sumatran tiger prey at PemerihanResort. The method use is a line transect a 1.000 x 1.000 meter plot whit 4observation lines. The types of activity traces of prey animals found includedfootprints, feed marks, nests and traces of other activities left by prey animals. The form of the spatial distribution of prey animal activity traces is clustered withan Ip (Morisita Index) value of 2.14. The results of the chi square test showthat there is a relationship between activity traces and habitat characteristics, activitytraces are mostly found in primary and secondary forest land cover types withsloping slope classes (8-15%), the distance found close to water sources <1000mand 1000-2000m from the settlement.
Keyword: Activity trace, Pemerihan Resort, Spatial distribution, Sumatran tiger prey.

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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