Judul: Diversity of Soil Arthropods in the Core Zone of Mount Halimun Salak National Park
Abstrak: Arthropoda tanah merupakan salah satu kelompok fauna yang hidup di tanah dan berperan dalam memengaruhi laju pembentukan tanah, dan siklus hara dalam ekosistem. Penelitian ini bertujuan untuk mengidentifikasi keanekaragaman Arthropoda tanah yang didapatkan pada Zona Inti Taman Nasional Gunung Halimun Salak (TNGHS), dan menganalisis pengaruh antara dua kelas kerapatan vegetasi, faktor edafis maupun faktor klimatis terhadap keanekaragaman Arthropoda tanah yang ditemukan pada kerapatan vegetasi di Zona Inti TNGHS. Metode yang digunakan dalam pengambilan sampel Arthropoda tanah menggunakan metode pitfall trap dan hand sorting. Data keanekaragaman Arthropoda tanah dengan faktor lingkungan dianalisis menggunakan uji Korelasi Pearson dan uji Paired Sample t-Test. Hasil penelitian ditemukan 16 ordo dan 39 famili yang berbeda dan didominasi oleh famili Formicidae (Hymenoptera) pada kedua kelas kerapatan vegetasi. Indeks keanekaragaman Arthropoda tanah (H’) pada kedua kelas kerapatan berjumlah 1,24 dan 1,44. Hasil uji t-Test menunjukkan tidak adanya perbedaan yang signifikan antara kedua kelas kerapatan vegetasi. Faktor edafis dan faktor klimatis memiliki hubungan korelasi baik ke arah positif maupun negatif dengan keanekaragaman Arthropoda tanah.
Keyword: Arthropoda tanah, edafis, klimatis, Taman Nasional Gunung Halimun Salak

Judul: Diversity of Soil Arthropod in the Rehabilitation Zone of Gunung Halimun Salak National Park
Abstrak: Arthropoda tanah merupakan salah satu faktor penentu dari kesuburan tanah dan kehadirannya memiliki peranan penting terhadap ekosistem. Penelitian ini dilaksanakan di Zona Rehabilitasi, Resort Gunung Kendeng, Kawasan Taman Nasional Gunung Halimun Salak (TNGHS). Penelitian bertujuan untuk mengidentifikasi keanekaragaman, menganalisis pengaruh kerapatan vegetasi dan menganalisis pengaruh kondisi lingkungan terhadap keanekaragaman Arthropoda tanah di Zona Rehabilitasi TNGHS. Sampel Arthropoda tanah diambil pada petak pengamatan 50 m x 50 m sebanyak 14 petak pengamatan. Sub petak pengamatan ditempatkan sebanyak 9 kali ulangan secara acak pada tiap petak pengamatan. Pengambilan sampel tanah dan pengukuran faktor lingkungan dilakukan pada sub petak pengamatan berukuran 50 cm x 50 cm sebanyak tiga kali ulangan tiap petak pengamatan. Didapatkan 24 famili Arthropoda tanah yang berasal dari 13 ordo yang berbeda. Indeks keanekaragaman (H’) antara dua kerapatan vegetasi tidak berbeda nyata, pada kerapatan vegetasi tinggi didapatkan H’ 0,80 dan pada kerapatan sedang H’ 0,73. Hubungan keanekaragaman Arthropoda dengan faktor edafis seperti respirasi tanah yaitu berbanding terbalik, sedangkan pH tanah dan ketebalan serasah menunjukkan hubungan yang berbanding lurus. Hubungan faktor klimatis dengan keanekaragaman Arthropoda pada kerapatan vegetasi tinggi adalah berbanding lurus, sedangkan pada kerapatan vegetasi sedang menunjukkan hubungan yang berbanding terbalik., Soil arthropod is one of the determining factors of soil fertility and have an important role in the ecosystem. The research was conducted in the Rehabilitation Zone, Gunung Kendeng Resort, Gunung Halimun Salak National Park (GHSNP). The purpose of this study was to identify the diversity, analyze the effect of vegetation density, and analyze the effect of environmental conditions on soil arthropods in Rehabilitation Zone on GHSNP. Soil arthropod were collected from 50 m x 50 m with a total 14 observation plots. Sub- observation plots were placed 9 repetation in each plot. Soil sampling and environmental factor measurements were taken on 50 cm x 50 cm sub plot with 3 replications. There are 24 families of soil arthropods were obtained from 13 different orders. The index of diversity (H’) between two vegetation densities was not significant, with H’ values 0,80 for hight vegetation density and 0,73 for moderate vegetation density. The relationship between diversity of soil arthropod and edaphic factors such as soil respiration showed an negatively correlation, while pH and soil pH showed a positively correlation. The relationship between climatic factors at high vegetation density showed a linear relation, while at moderate vegetation density showed an inverse relation.
Keyword: soil arthropod, climatic, diversity, edaphic, pitfall trap

Judul: Elektrodeposisi Film Tipis Semikonduktor Cu2ZnSnS4 (CZTS) pada Substrat Kaca ITO
Abstrak: Semiconductor Cu2ZnSnS4 (CZTS) thin film that can be used as absorber layers on solar cell module was made via electrodeposition method. CZTS thin film was electrodeposited on the surface of a silicate glass coated with a thin layer of indium tin oxide (ITO). Deposition process was done using potentiostatic mode at room temperature with a potential of 1.05 V for 30, 45, and 60 minutes, followed with annealing the film at 2 different temperatures, 500 ºC using furnace and 180 ºC using hot plate, both treatments for 45 minutes in N2/H2S atmosphere. The X-ray difractograms were analyzed using Match 2 program and showed that the CZTS thin films had kesterit crystalline structure, with a low percentage of CZTS phase. The thin film also contained secondary phases such as Cu2S, ZnS, and SnS. The obtained CZTS thin films had a thickness between 1.039 and 1.676 μm. Absorption study showed that the band gap energy of CZTS thin films which was annealed using furnace ranged from 1.50 to 1.52 eV, whereas that annealed using the hot plate was not observed. The band gap energy value showed that CZTS thin films can be used as sunlight absorber layers on solar cell. The formation of CZTS crystal film on this investigation was effectively performed using furnace annealing process at a temperature of 500 ºC with deposition time of 45 minutes.
Keyword: Thin film, Electrodeposition, Cu2ZnSnS4