Judul: Prospek Pengembangan Ekowisata Primata di Taman Nasional Danau Sentarum, Kalimantan Barat
Abstrak: Primata belum menjadi fokus dalam pengelolaan di Taman Nasional Danau Sentarum, maka dari itu diperlukan pengembangan ekowisata primata. Pengembangan ekowisata primata merupakan bentuk alternatif dari pengelolaan satwa liar. Penelitian ini dilakukan di Taman Nasional Danau Sentarum di wilayah Resort Lupak Mawang, Semangit dan Resort Sepandan yang bertujuan untuk menilai potensi primata dan kondisi lingkungan untuk pengembangan ekowisata primata dan menyusun prospek pengembangan ekowisata primata di Taman Nasional Danau Sentarum. Penelitian menggunakan metode observasi langsung dan studi pustaka. Metode analisis yang digunakan adalah ADO-ODTWA yang telah dimodifikasi dengan konsentrasi pada primata dan analisis deskriptif. Prospek pengembangan ekowisata primata di Resort Lupak Mawang, Resort Semangit dan Resort Sepandan memiliki nilai indeks potensi ekowisata primata masing-masing sebesar 83,56%, 80,86%, dan 87,44% dengan kategori layak untuk dikembangkan. Resort Sepandan memiliki nilai tertinggi yang dapat dijadikan sebagai rekomendasi prioritas dalam pengembangan ekowisata primata karena selain potensi yang dimiliki di dalam kawasan terdapat potensi yang dimiliki di luar kawasan, sehingga untuk memaksimalkan potensi yang dimiliki diperlukan pengembangan ekowisata primata., Primates have not become a focus in the management of Danau Sentarum National Park, therefore it is necessary to develop primate ecotourism. The development of primate ecotourism is an alternative form of wildlife management. This research was conducted in Danau Sentarum National Park in the area of Resort Lupak Mawang, Resort Semangit and Resort Sepandan which aims to assess the potential of primates and the environment for the development of primate ecotourism and develop prospects for the development of primate ecotourism in Danau Setarum National Park. The research using direct observation and study methods. References. The analytical method used is the ADO-ODTWA which has been determined with a concentration on primates and descriptive analysis. The prospect of primate ecotourism development at the Lupak Mawang Resort, Semangit Resort and Sepandan Resort has a primate ecotourism potential index value of 83,56%, 80,86%, and 87,44%, respectively, with a feasible category for development. The Sepandan Resort has the highest value that can be used as a priority recommendation in the development of primate ecotourism because in addition to the potential possessed in the area, there is potential outside the area, so as to maximize the potential needed in the development of primate ecotourism.
Keyword: Danau Sentarum National Park, primates, primate ecotourism development

Judul: Kohabitasi Ruang Lutung Sentarum (Presbytis chrysomelas cruciger) di Kawasan Bukit Semujan Taman Nasional Danau Sentarum.
Abstrak: Lutung sentarum (Presbytis chrysomelas cruciger) termasuk dalam kategori Critically Endangered (CE) atau terancam punah. Tujuan dari penelitian ini yaitu untuk memetakan wilayah, mengetahui tumpang tindih, dan bentuk kohabitasi primata. Penelitian ini dilaksanakan pada bulan Januari 2022 dengan menggunakan metode ad libitum sampling dan scan sampling. Hasil dari penelitian ini diketahui luas wilayah jelajah lutung sentarum sebesar 25,2 ha dan monyet ekor panjang sebesar 7,0 ha. Tumpang tindih ruang kedua primata ini terjadi pada strata C. Nilai tumpang tindih dianalisis menggunakan Indeks Jaccard penggunaan ruang vertikal lutung sentarum dan monyet ekor panjang yaitu 0,13, sedangkan Indeks Jaccard terhadap jumlah jenis pakan sebesar 0,56. Nilai tumpang tindih kedua primata berdasarkan jenis pakan dengan perhitungan MacArthur dan Levin sebesar 0,82. Perhitungan luas relung ekologi menggunakan persamaan Smith untuk lutung sentarum pada taraf nyata (selang kepercayaan 95%) adalah FT =0,795 dengan nilai batas bawah dan batas atas sebesar 0,625 ≤ FT ≥ 0,918, monyet ekor panjang senilai FT = 0,664 dengan nilai batas bawah dan batas atas sebesar 0,846 ≤ FT ≥ 0,429. Kata kunci: Danau Sentarum, kohabitasi, Lutung sentarum, Monyet ekor panjang, Bornean Langur (Presbytis chrysomelas ssp. cruciger) is included in the Critically Endangered (CE) category or threatened with extinction. The purpose of this study was to map the area, find out the overlap, and the form of cohabitation of the primates. This research was conducted in January 2022 using ad libitum sampling and scan sampling methods. The results of this study indicated that the roaming area of the Bornean langur is 25,2 ha and the long-tailed monkey is 7,0 ha. The spatial overlap of these two primates occurs in strata C. The value of the overlap was analyzed using the Jaccard Index of using vertical space for langur sentarum and long-tailed monkeys, which is 0.13, while the Jaccard Index for the number of types of feed is 0.56. The overlapping value of the two primates based on the type of feed calculated by MacArthur and Levin was 0.82. Calculation of ecological niche area using Smith's equation for langur sentarum at a significant level (95% confidence interval) for langur sentarum is FT = 0.795 with the lower and upper limit values of 0.625≤ FT ≥ 0.918, long-tailed monkeys worth FT = 0.664 with the lower and upper limit values of 0.846 ≤ FT ≥0.429. Keywords: Bornean Langur, Cohabitation, Long tailed monkey, Sentarum Lake
Keyword: Kohabitasi, Danau Sentarum, Lutung Sentarum, Monyet Ekor Panjang

Judul: Characterizations of low alloy steel sae 4422  plated with chromic acid (Cro3)
Abstrak: Characterizations of low alloy steel SAE 4422 plated with chromic acid (CrOrO3) was use Optical Microscopy (OM), Scanning Electron Microscopy (SEM), X-Ray Diffraction (XRD), RD),Energy Dispersive Analysis of X-Ray (EDAX), Hardness Test and Roughness Test. Microstructures analysis exhibits cracks and grain boundaries microcracks as a characteristics of chrome metal found at plating metal. Perlite and Ferrite as grains of steel found at base metal with grain boundaries around it. Phase analysis of plating metal appropriate to chrome metal with lattice constant (a) is 2.559 Å and phase analysis of base metal appropriate to iron ferrite with lattice constant (a) is 3.318 Å. Both plating and base metal have cubic system. Chemical analysis of plating metal at surface section exhibits that cracks area have highest value of carbon element compare with grains and grains boundaries area. While chemical analysis of base metal at cross section exhibits that perlite have highest value of carbon element compare with ferrite and grain boundaries. The hardness value of plating metal at surface section and cross section are 753 and 637 VHN. While, the hardness value of base metal and interface area at cross section are 205 and 373 VHN. The roughness value at measurement points of chrome surface for as received sample are 0.445 μm. Observation used Optical Microscopy and Scanning Electron Microscopy exhibits surface irregularities combine to form surface texture of plating metal at surface section.
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