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: Teknik Pemeliharaan dan Tingkat Kesejahteraan Owa jawa (Hylobates moloch) di Taman Safari Indonesia Bogor
Abstrak: Penurunan populasi owa jawa di alam semakin meningkat sehingga diperlukan adanya konservasi eksitu. Taman Safari Indonesia Bogor merupakan salah satu lembaga konservasi eksitu yang berkomitmen dalam penerapan prinsip kesejahteraan satwa. Penelitian ini bertujuan mengkaji teknik pemeliharaan, menilai tingkat kesejahteraan, dan mengkaji pemanfaatan owa jawa di Taman Safari Indonesia Bogor. Penelitian ini dilakukan di kandang penangkaran owa jawa yang berada di Taman Safari Indonesia pada Mei 2023. Metode yang digunakan yaitu pengamatan, pengukuran, wawancara, dan studi pustaka. Hasil penelitian menunjukkan bahwa teknik pemeliharaan (perkandangan, pakan, kesehatan, reproduksi, dan Sumber Daya Manusia) sudah sangat baik, namun tetap perlu adanya perbaikan terkait dengan adanya asap rokok dan perlunya penambahan variasi jenis pakan yang diberikan. Tingkat kesejahteraan owa jawa yang berada di dua penangkaran masuk dalam klasifikasi sangat baik dengan nilai kesejahteraan satwa di Penangkaran Penangkaran Burung sebesar 93,06 dan Penangkaran Rumah Dua sebesar 92,96. Pemanfaatan owa jawa yang berada di Taman Safari Indonesia Bogor dilakukan untuk rencana kegiatan pelepasliaran., The decline in the Javan gibbon population in nature is increasing so that ex situ conservation is needed. Taman Safari Indonesia Bogor is one of the ex-situ conservation organizations committed to implementing the principles of animal welfare. This study aims to examine maintenance techniques, assess the level of well-being, and evaluate the utilization of the Javan gibbon in Taman Safari Indonesia Bogor. This research was conducted in the Javan gibbon captivity at Taman Safari Indonesia in May 2023. The methods used were observation, measurement, interviews, and literature study. The results showed that maintenance techniques (housing, feed, health, reproduction, and human resources) were very good, but improvements were still needed due to the presence of cigarette smoke and the need to add variations in the type of feed given. The welfare level of the Javan gibbon in two captives is classified as very good with an animal welfare value in Bird Breeding captivity of 93.06 and Rumah Dua captivity of 92.96. The use of the Javan gibbon in Taman Safari Indonesia Bogor is carried out for planned release activities.
Keyword: Owa jawa, pemanfaatan, teknik pemeliharaan, tingkat kesejahteraan

Judul: Pembuatan Film Tipis Cu2ZnSnS4 sebagai Lapisan Penyerap Cahaya pada Sel Surya Menggunakan Metode Elektrodeposisi
Abstrak: Thin film of Cu2ZnSnS4 (CZTS) is an alternative semiconductor used as light absorber layer on solar cell. CZTS can replace silicon that commonly used as commercial semiconductor. The advantage of using CZTS as absorber layer is due to the abundance of its chemical composer on earth, and its high value of absorption coefficient. The absorber layer was made by using electrodeposition method on ITO glass substrates. The films were deposited at room temperature using potentiostatic mode with a potential of –1.05 V for 30, 45, and 60 minutes. After that, the films were annealed at two different temperatures, 180 ºC and 500 °C, for 45 minutes in N2/H2S atmosphere. Based on X-ray diffraction analysis, the polycrystalline thin film obtained fall into kesterite crystal phase. This type of crystal was obtained when the CZTS was annealed at 500 °C in H2S/N2 atmosphere. The value of optical band gap energy for the CZTS thin film was 2.2 eV with the film thickness about 1.228–6.366 μm. The sample of CZTS with electrodeposition time of 45 minutes and annealing temperature of 500 °C showed the best result and in conformity with absorber layers criteria for solar cells.
Keyword: semiconductor, ITO glass, CZTS thin film, electrodeposition