Judul: Peubah Pembeda Ukuran Tubuh Kambing Peranakan Etawah (PE) Induk Betina di antara Peternakan yang Berbeda
Abstrak: Kambing Peranakan Etawah (PE) merupakan hasil grading-up antara kambing etawah dan kambing kacang yang mewariskan sifat-sifat tetuanya. Perubahan morfologi pada kambing PE dapat terjadi akibat perbedaan adaptasi di kondisi ekologi yang berbeda-beda. Penelitian ini bertujuan untuk mengetahui variabel pembeda ukuran permukaan tubuh kambing PE betina dewasa yang sudah laktasi (umur 3 tahun atau kondisi gigi I3) antara BBPTU-HPT Baturraden dan BPTU-HPT Pelaihari di Kalimantan Selatan. Pengukuran permukaan tubuh linear kambing PE meliputi tinggi pundak (X1), tinggi pinggul (X2), panjang badan (X3), lebar dada (X4), dalam dada (X5), lebar pinggul (X6), panjang pinggul (X7), lingkar dada (X8), dan lingkar kanon (X9). Data dianalisis dengan statistik deskriptif, T2 Hotelling, diskriminan Fisher, dan penggolongan Ward-Anderson. Peubah pembeda ukuran permukaan tubuh linear antara kambing PE betina peternakan Baturraden dan Pelaihari ditemukan sebanyak 6 buah, yaitu tinggi pundak (X1), lebar dada (X4), dalam dada (X5), panjang pinggul (X7), lingkar dada (X8), dan lingkar kanon (X9). Penggolongan Wald-Anderson menunjukkan bahwa kelompok kambing PE di peternakan Baturraden dan Pelaihari tidak memiliki kemimripan ukuran tubuh sehingga seluruh kelompok kambing PE di masing-masing peternakan dapat dipertahankan., Etawah-grade Goat is the result of grading up between etawah goat and kacang goat that has the inheritance of their parents' trait. Morphological changes in etawah-grade goat can occur due to differences in adaptation in different ecological conditions. The purpose of this research was to determine the discriminator variables of body size measurements in BBPTU-HPT Baturraden and BPTU-HPT Pelaihari with a total of 30 heads of does in each farm. Body size measurements was performed on 3 years old Etawah-grade does which consisted of withers height (X1), hip height (X2), body length (X3), chest width (X4), chest depth (X5), hip-width (X6), hip-length (X7), chest girth (X8), and cannon circumference (X9). Data were analyzed by descriptive statistics, T2-Hotelling, Fisher discriminant, and Wald-Anderson classification. Six discriminator variables were found in Baturraden and Pelaihari, consisted of withers height (X1), chest width (X4), chest depth (X5), hip-length (X7), chest girth (X8), and cannon circumference (X9). The classification of Wald-Anderson showed that Etawahgrade does of Baturraden and Pelaihari are not similar in body size so that all Etawah-grade does can be maintained on each farm.
Keyword: analisis diskriminan, kambing peranakan etawah, peubah pembeda, ukuran tubuh, body size measurements, discriminant analysis, discriminator variables, etawah-grade goat

Judul: Variabel Pembeda Ukuran Tubuh Kambing Peranakan Etawah (PE) Betina di Tiga Peternakan Berbeda
Abstrak: The purpose of this research was to determine the differences among surface linear measurement body morphometric characteristics of BPTU KDIHPT Pelaihari, Cordero Farm, and Doa Anak Yatim Farm Etawah Grade goat females. Number of Etawah Grade goat females be observed were 90 heads (30 heads of each). Variables measured were shoulder height, hip height, body length, chest width, depth chest, hip width, rump length, chest circumference and cannon circumference. The data was analyzed with T2-Hotelling test, Fisher discriminan analysis, Wald-Anderson and D2-Mahalanobis minimum distance. Discriminator variables between BPTU KDI-HPT Pelaihari vs Cordero Farm Etawah Grade goat females were depth chest, rump length, chest circumference and cannon circumference, whereas those of BPTU KDI-HPT Pelaihari vs Doa Anak Yatim Farm Etawah Grade goat females were shoulder height, hip height, rump length and chest circumference, and those of Cordero Farm vs Doa Anak Yatim Farm Etawah Grade goats were shoulder height and hip height. Unsimilarity body morphometric distance between BPTU KDI-HPT Pelaihari vs Cordero Farm Etawah Grade goat females was 4.617, whereas that of BPTU KDI-HPT Pelaihari vs Doa Anak Yatim Farm Etawah Grade goat females was 5.952 and that of Cordero Farm vs Doa Anak Yatim Farm Etawah Grade goat females was 2.265. BPTU KDI-HPT Pelaihari Etawah Grade goat females was separated from Cordero Farm and Doa Anak Yatim Farm ones . Cordero Farm Etawah Grade goat females formed a category together with Doa Anak Yatim Farm ones conjecturable purpose milk production, whereas BPTU KDI-HPT Pelaihari formed category 2 as Etawah Grade goat females conjecturable purpose meat production.
Keyword: Bogor Agricultural University (IPB), Etawah Grade goat, discriminant analysis, body size discriminator

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