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: The Change in Composition of Butterfly Diversity on IPB Dramaga Campus in Bogor
Abstrak: Kampus Institut Pertanian Bogor Dramaga memiliki keanekaragaman hayati yang tinggi, salah satunya adalah keanekaragaman kupu-kupu. Keanekaragaman kupu-kupu dapat mengalami perubahan seiring berjalannya waktu yang disebabkan oleh perubahan iklim dan lingkungan. Penelitian ini bertujuan untuk mengetahui keanekaragaman, kemerataan, dan kesamaan jenis kupu-kupu di Kampus IPB Dramaga, serta mengetahui perubahan keanekaragaman jenis kupu-kupu di kawasan Kampus IPB Dramaga setelah mengalami perubahan tersebut. Pengambilan data dilakukan dengan metode Pollard transect dan mendapatkan 116 individu kupu-kupu yang terdiri dari 28 jenis. Kupu-kupu yang ditemukan terdiri dari 4 famili, yaitu Pieridae, Nymphalidae, Papilionidae, dan Lycaenidae. Keanekaragaman jenis kupu-kupu tertinggi berada pada lokasi Danau SDGs dengan nilai 2,12. Nilai kemerataan jenis kupu-kupu tertinggi yaitu pada lokasi Taman Konservasi dengan nilai 0,97. Tingkat kesamaan jenis tertinggi terjadi antara lokasi Danau SDGs dan Jalan Ulin dengan nilai 0,38. Secara umum, keanekaragaman kupu-kupu di Kampus IPB Dramaga mengalami penurunan dalam kurun waktu 10 tahun., IPB University has high biodiversity, one of which is butterfly diversity. Butterfly diversity can change over time due to climate and environmental changes. This study aims to determine the diversity, evenness, and similarity of butterfly species in the Dramaga Campus of IPB, and to determine changes in the diversity of butterfly species in the area of the Dramaga Campus of IPB after experiencing these changes. Data was collected using the Pollard transect method and obtained 116 butterfly individuals consisting of 28 species. The butterflies found consisted of 4 families, namely Pieridae, Nymphalidae, Papilionidae, and Lycaenidae. The highest diversity of butterfly species is in the Lake SDGs location with a value of 2,12. The highest evenness value of butterfly species is at the Conservation Park location with a value of 0,97. The highest level of similarity occurs between Lake SDGs and Jalan Ulin with a value of 0,38. In general, the diversity of butterflies on the Dramaga Campus of IPB has decreased over the past 10 years.
Keyword: butterflies, IPB Dramaga, species diversity, species evenness, species similarity

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