Judul: Economic Valuation of Javan Gibbons (Hylobates moloch) in Ragunan Wildlife Park and Javan Gibbon Center
Abstrak: Owa jawa (Hylobates moloch) merupakan primata endemik Indonesia yang dilindungi dan terancam punah akibat perburuan dan perdagangan ilegal. Perhitungan nilai ekonomi owa jawa penting dilakukan sebagai dasar penetapan denda atau nilai tukar bagi pelaku kejahatan owa jawa. Penelitian ini bertujuan menganalisis hubungan antara karakteristik responden dengan nilai willingness to pay (WTP), menduga nilai ekonomi owa jawa berdasarkan pendekatan WTP pengunjung dan biaya pemeliharaan di Taman Margasatwa Ragunan dan Pusat Rehabilitasi Owa Jawa, serta membandingkan kedua metodologi valuasi ekonomi yang digunakan. Pengumpulan data dilakukan melalui studi literatur, observasi, dan wawancara kepada 145 orang pengunjung dan 2 sampai 4 orang pengelola. Variabel karakteristik responden yang berpengaruh nyata terhadap nilai WTP meliputi pendapatan, pekerjaan, jenis kelamin, dan tingkat pendidikan. Dugaan nilai ekonomi owa jawa berdasarkan WTP motif konservasi dan biaya pemeliharaan berturut-turut, yaitu sebesar Rp311.828,00/ekor dan Rp29.231.170,00/ekor. Biaya pemeliharaan merupakan metode yang efektif, efisien, dan menghasilkan nilai ekonomi yang dapat digunakan sebagai acuan denda perdagangan ilegal owa jawa., The Javan gibbon (Hylobates moloch) is an endemic primate to Indonesia that is protected and threatened with extinction due to hunting and illegal trade. It is important to calculate the economic value of the Javan gibbon as a basis for determining fines or exchange rates for perpetrators of Javan gibbon crimes. This research aims to analyze the relationship between respondent characteristics and willingness to pay (WTP) values, estimate the economic value of Javan gibbons based on the WTP approach of visitors and maintenance cost approach at Ragunan Wildlife Park and the Javan Gibbon Rehabilitation Center, and compare the two economic valuation methodologies used. used. Data collection were carried out through literature study, observation and interviews with 145 visitors and 2 to 4 managers. Respondent characteristic variables that have a significant effect on the WTP value include income, occupation, gender and education level. The estimated economic value of the Javan gibbon based on the conservation motive WTP and maintenance cost respectively approach is IDR 311,828.00/head and IDR 29,231,170.00/head. The maintenance cost is a more appropriate method to use because it is effective, efficient, and produces economic value that can be used as a reference for fines for illegal trade in Javan gibbons.
Keyword: biaya pemeliharaan, kesediaan membayar, owa jawa, perdagangan ilegal, valuasi ekonomi

Judul: Assessment of the Readiness on Release of Javan Gibbon (Hylobates moloch) in Javan Gibbon Center, Mount Gede Pangrango National Park
Abstrak: Owa jawa merupakan primata dilindungi yang masih diperdagangkan. Salah satu upaya konservasi owa jawa yaitu rehabilitasi sebelum dikembalikan ke alam liar. Penilaian kesiapan pelepasliaran merupakan salah satu cara untuk memastikan bahwa owa jawa dapat bertahan hidup setelah dilepasliarkan. Penelitian dilaksanakan di Javan Gibbon Center untuk menduga alokasi waktu aktivitas harian owa jawa pada masa rehabilitasi; dan membandingkan pola perilaku dan alokasi waktu aktivitas harian antara owa jawa masa rehabilitasi dengan owa jawa liar. Penelitian dilakukan pada bulan April selama 11 hari dengan mengamati aktivitas dua pasang owa jawa di kandang. Data tersebut kemudian dibandingkan dengan aktivitas owa jawa liar dan dimasukkan ke dalam tabel penilaian kesiapan pelepasliaran individu owa jawa. Tingkat kesamaan aktivitas harian owa jawa rehabilitan dengan owa jawa liar bervariasi, mulai dari 34,16-90,96% dengan tingkat kesamaan tertinggi pada aktivitas bergerak dan terendah pada aktivitas seksual. Pola perilaku bimodal tidak berlaku pada owa jawa di kandang rehabilitasi. Objek penelitian yang diamati masuk ke dalam kategori siap untuk dilepasliarkan., Javan gibbons (Hylobates moloch) are protected primates that are still being traded. One of the conservation efforts of the javan gibbon is rehabilitation before being returned to the wild. Assessment of release readiness is one way to ensure that the javan gibbon can survive after being released into the wild. The study was conducted at the Javan Gibbon Center to estimate the time allocation for the daily activities of the javan gibbons during the rehabilitation period; and comparing behavior patterns and time allocation of daily activities between Javan gibbons during rehabilitation and wild javan gibbons. The study was conducted in April for 11 days by observing the activity of two pairs of javan gibbons in a cage. These data were then compared with the activity of wild javan gibbons and entered into a table for assessing individual release readiness of javan gibbons. The level of similarity in the daily activities of the rehabilitated Javanese gibbon with the liar Javan gibbon varied, ranging from 34.16-90.96% with the highest level of similarity in moving activities and the lowest in sexual activity. Bimodal behavior patterns did not apply to Javan gibbons in rehabilitation cages. The observed object of research is categorized as ready to be released into the wild.
Keyword: daily activity, javan gibbon, Javan Gibbon Center, rehabilitation

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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