Judul: Affiliative Behaviour of Javan Gibbon (Hylobates moloch) Pairs at Javan Primate Rehabilitation Center, Ciwidey, West Java
Abstrak: Owa jawa merupakan primata endemik Pulau Jawa dengan status konservasi genting (endangered). Perilaku afiliatif merupakan perilaku sosial yang bersifat positif berupa bersentuhan, duduk berdekatan, saling menelisik, berpelukan, dan perilaku seksual. Penelitian bertujuan mengidentifikasi perilaku afiliatif serta kecenderungan perilaku kawin yang dilakukan pasangan owa jawa dewasa di Pusat Rehabilitasi Primata Jawa (PRPJ) Patuha, Ciwidey, Jawa Barat. Data perilaku afiliatif diambil dengan menggunakan metode focal-animal sampling selama 104 jam. Perilaku afiliatif yang teramati pada pasangan owa jawa Acoy (♀) – Iwan (♂) dan Kimba (♀) – Douglas (♂), yaitu mendekati, duduk berdekatan, bergelantungan berdekatan, dan saling menelisik. Perilaku duduk berdekatan paling banyak dilakukan oleh kedua pasangan, sedangkan perilaku saling menelisik hanya dilakukan oleh pasangan Kimba (♀) – Douglas (♂). Perilaku duduk berdekatan dilakukan dalam durasi yang paling tinggi dibandingkan perilaku afiliatif lainnya. Kedua pasangan tidak memiliki kecenderungan melakukan perilaku kawin selama pengamatan dilakukan.
Keyword: allogrooming, Ciwidey, focal-animal sampling, mating behaviour, proximity

Judul: Analisis Kesiapan Pasangan Owa Jawa (Hylobates moloch Audebert, 1798) untuk Pelepasliaran Ditinjau dari Perilaku Kawin di Javan Gibbon Center
Abstrak: Javan gibbon is one of the endemic wildlife in Javan whose endangered. The potency of javan gibbon reproduction whose monogamy is low. One criteria of reintroduction and a release pair of Javan gibbon are succeeding in reproduction. Research is doing in Javan Gibbon Center for 2 pairs of Javan Gibbon, that is Robin-Moni and Asep-Dompu. The aims of this research is to know the suited javan gibbon couple and watch the sign of breeding tendency of javan gibbon. Observe use scan sampling method and record with one-zero sampling for daily activity and ad-libitum method for breeding behavior. The result of this research is indicate that Asep-Dompu has closer than Robin-Moni. It shows from pair association whose doing by Asep-Dompu, like allogrooming, sleep together, and feed sharing. Breeding activity is not observed in this research from 2 pairs of javan gibbon, but the sign whose indicate to occur copulation was detected.
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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