Judul: Habitat and population of javan gibbon (Hylobates moloch Audebert, 1797) at Gunung Gede Pangrango National Park, West Java
Abstrak: Javan gibbon (Hylobates moloch Audebert, 1797) is one of the endemic primates of Indonesia, distributed in West and Central Java. High degree of threats for javan gibbon in the wild must be addressed by management effort based on complete present data of its habitat and population. This research conducted in Gunung Gede Pangrango National Park and aimed to: (1) analyze the habitat of javan gibbon; (2) study javan gibbon population data; (3) study javan gibbon’s habitat and population problems affecting the existence of the species. Vegetation sampling was taken along survey transect at 7 resort. There were 44 feeding tree species from 24 families and 17 species from 7 families used by the gibbons as sleeping trees. The total number of individuals founded in this research was 42 individuals of 13 groups. The densities of javan gibbon at core zone was 7,14 individuals/km2 and 2,30 groups/km2 , whereas at utilization zone was 5,69 individuals/km2 and 1,54 groups/km2 . Estimated total individual density was 6,43 individu/km2 whereas group density was 1,93 groups/km2 . The estimation of javan gibbon in Gunung Gede Pangrango National Park was 347 individuals in 105 groups. The highest percentage of daily activities was eating of 34,63 %, and the lowest was agression (through vocalization) of 3,21 %. Several problems occured to the habitat and the population of javan gibbon in Gunung Gede Pangrango National Park were: (1) illegal logging; (2) agricultural landclearing; (3) tourists and other human activities; (4) illegal hunting; (5) firewoods gathering; (6) non-wood forest product extraction. There are three recommendations to ensure the conservation of javan gibbons in Gunung Gede Pangrango National Park: (1) Enhancing the management of Gunung Gede Pangrango National Park areas; (2) Managing the activities of local people; and (3) Managing tourist of Gunung Gede Pangrango National Park Keywords: Javan gibbon, Hylobates moloch, habitat, population, National Park, Salah satu jenis primata endemik yang dimiliki Indonesia adalah owa jawa atau javan gibbon (Hylobates moloch Audebert 1797), dengan wilayah penyebaran meliputi Jawa Barat dan Jawa Tengah. Tingkat keterancaman yang tinggi dari owa jawa di alam menyebabkan perlunya pengelolaan berdasarkan data yang lengkap terhadap habitat alami dan populasi owa jawa yang ada. Penelitian ini dilaksanakan untuk melengkapi kebutuhan data yang diperlukan untuk pengelolaan owa jawa di Taman Nasional Gunung Gede Pangrango (TNGP). Tujuan penelitian ini adalah: (1) menganalisis habitat owa jawa; (2) mengkaji populasi owa jawa; (3) mengkaji permasalahan habitat dan populasi yang berpengaruh terhadap keberadaan owa jawa. Data-data yang dikumpulkan meliputi data primer dan sekunder, melalui pengamatan langsung terhadap habitat dan populasi owa jawa di lapangan serta studi literatur yang relevan dengan bidang kajian. Penelitian dilakukan pada beberapa lokasi yang mewakili sebaran populasi owa jawa di TNGP berdasarkan resort dan zonasi (inti dan pemanfaatan). Informasi sebaran owa jawa diperoleh dari penelitian-penelitian terdahulu, informasi petugas lapangan TNGP, serta informasi dari masyarakat.
Keyword: National Park

Judul: Dukungan Masyarakat Lokal dan Habitat untuk Konservasi Owa jawa (Hylobates moloch, Audebert, 1798) di Resort Bodogol Taman Nasional Gunung Gede Pangrango
Abstrak: The Javan gibbon (Hylobates moloch Audebert, 1798)), found in Western Java, is one of the rarest and most endangered hylobatids. The role of local community on natural resource management and wildlife conservation in national parks, particularly in Mount Gede Pangrango (Resort Bodogol), is of vital importance. The aims of the study were to analyze the community activities conducted for the population of H. moloch, predict population growth for H. moloch and identify the use of habitat by H. moloch. The study was analyzed descriptively using data collected by questionnaires as well as field observation. Purposive Sampling technique was used to collect data from 100 respondents. The results showed that only 25% of them were active participants regarding conservation of H. moloch. The population of H. moloch consisted of 13 groups with 39 individuals which are 13 adult males and 14 adult females, 5 sub adult males, 4 sub adult females and 3 infantiles. The average population density was estimated at 27 animals/km2, the standard error of 2,61, with coefficient of variance 6,69%.The group studied was composed of one adult male, two adult female, two subs adult and one infant. The results from Focal Animal sampling method within five minutes interval showed that the time proportion of group activities consisted of feeding (33,06%), moving (10,87%), resting (36,26%), calling (4,32%) and social activities (15,45%). The value of sex ratio is 1:1,25 for sub adult, while the value of adult sex ratio was 1:0,92. Both of the sex ratio closes to 1:1. The rate of natality is 0,21, while the mortality rate cannot be calculated due to the lack of direct observation and time constraint. It is found that the diversity of plant species in habitat, consisted of 77 species from 27 families. Keywords: Javan gibbon, habitat, conservation, Bodogol
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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