Judul: Dinamika Keanekaragaman Jenis dan Karakteristik Habitat Kupu-kupu di Kawasan Kampus IPB Darmaga
Abstrak: The diversity of wildlife including butterfly is one of the factors that becomes a consideration on the declaration of Bogor Agricultural Institute (IPB) as Campus Biodiversity. The development of land use at IPB Darmaga requires a research on the relationship between habitat characteristics with the diversity of butterfly as a comparison with the previous study to provide habitat management data for the management of IPB Darmaga campus. The study was conducted at eight habitat types in IPB Darmaga, which are: 1) Arboretum of Landscape, 2) Al Hurriyah Forest, 3) Sengon Forest, 4) Akasia Forest, 5) DAR Area, Faculty of Forestry, 6) Residential of Lecturers (Perumahan dosen), 7) Cikabayan and 8) Gymnasium Area. The result of this research gets 707 butterfly consisting 55 species of butterfly. Butterflies which were found consists of five families, namely Papilionidae (8 species), Nymphalidae (29 species), Pieridae (8 species), Lycaenidae (4 species) and Hesperidae (6 species). Residential of Lecturers (Perumahan dosen) habitat has the highest species diversity value of 2.93 with an average temperature characteristics of 30.330C, relative humidity average of 75.89%, the value of Leaf Area Index (LAI) of 1.507 and has a diversity of larvae feed plants, butterflies feed plants and shelters. Generally, species diversity index values and the number of butterfly species has decreased compared to previous studies due to changes in land use on IPB Darmaga campus that disturbs the habitat of butterfly.
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Judul: Diversity of Butterflies at Three Locations with Different Environmental Characteristics in Bogor
Abstrak: Kupu-kupu merupakan serangga yang termasuk ke dalam organisme bioindikator lingkungan. Keberadaan kupu-kupu dipengaruhi oleh faktor biotik (vegetasi pakan ulat dan pakan kupu-kupu) dan abiotik (suhu udara, kelembapan udara, kecepatan angin, leaf area index, ketersediaan sumber air, dan pencemaran udara). Penelitian ini bertujuan mengidentifikasi kekayaan, keanekaragaman, dan kemerataan jenis kupu-kupu pada tiga lokasi di Bogor dan menganalisis hubungan antara komunitas kupu-kupu dengan dengan karakteristik lingkungan yang berbeda pada Kampus IPB, Jalan Jendral Sudirman, dan Jalan K.H. Tubagus Muhammad Falak. Penelitian menggunakan metode transek dan metode eksplorasi. Ditemukan 64 jenis kupu-kupu dari 5 famili yang terdiri atas 40 jenis di Kampus IPB, 24 jenis di Jalan K.H. Tubagus Muhammad Falak, dan 19 jenis di Jalan Jendral Sudirman. Karakteristik lingkungan Kampus IPB yang didukung oleh faktor vegetasi pakan ulat, kelembapan udara, dan leaf area index menjadikannya sebagai lokasi yang paling mendukung bagi kehidupan kupu-kupu. Jumlah jenis, kekayaan jenis dan keanekaragaman jenis kupu-kupu akan meningkat seiring dengan meningkatnya ketersediaan vegetasi pakan ulat. Jumlah jenis akan meningkat seiring dengan meningkatnya kelembapan udara hingga 85%., Butterflies are insects that have been depicted as environmental bioindicator organisms. The presence of butterflies is affected by biotic factors (host and food plants) and abiotic factors (air temperature, air humidity, wind speed, leaf area index, water sources, and air pollution). This study aims to identify the butterfly species richness, diversity, and evenness at three locations in Bogor and to analyze the association between buterfly community and the environmental characteristics at IPB University, Jendral Sudirman street, and K.H. Tubagus Muhammad Falak street, Bogor. Sample data were collected using the transect method and exploration method. There were 64 species from 5 families, consisting of 40 species on IPB University, 24 species on K.H. Tubagus Muhammad Falak street, and 19 species on Jendral Sudirman street. IPB University was found as the most suitable location that supports butterfly life cycle as their environmental characteristics are supported by their host plants, humidity, and leaf area index. The number, richness, and diversity of butterfly species will increase along with the increasing availability of host plants. Number of species will increase along as the humidity increases up to 85%.
Keyword: abiotic, bioindicator, biotic, butterfly, environmental characteristics

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