Judul: Penggolongan Morfometrik Jantan Sapi Bali, Peranakan Ongole dan Pesisir melalui Analisis Diskriminan Fisher, Wald-Andserson dan Jarak Minimum D2 Mahalanobis.
Abstrak: Penelitian ini dilaksanakan di Mitra Tani Farm; Rumah Pemotongan Hewan (RPH) Pancoran Mas, Depok dan Balai Penyuluhan dan Peternakan Lengayang Kabupaten Pesisir Selatan Sumatera Barat. Pengukuran meliputi panjang badan, lebar dada, dalam dada, lingkar dada, tinggi pinggul, lebar pinggul, tinggi pundak, lingkar pergelangan kaki, lebar tulang tapis dan panjang kelangkang. Data dianalisis dengan menggunakan analisis deskriptif, uji T2 Hotelling, analisis Diskriminan Fisher, penggolongan Wald-Anderson dan jarak minimum D2 Mahalanobis. Hasil penelitian pada uji T2 Hotelling menunjukkan perbedaan ukuran-ukuran tubuh jantan pada sapi yang diamati. Berdasarkan analisis Diskriminan Fisher ditemukan perbedaan morfometrik ukuran tubuh pada jantan sapi PO vs sapi Pesisir, jantan sapi PO vs sapi Bali dan jantan sapi Bali vs sapi Pesisir. Variabel-variabel pembeda pada jantan sapi PO vs sapi Pesisir dan sapi Bali vs sapi Pesisir adalah panjang badan (X1), lebar dada (X2), dalam dada (X3), lingkar dada (X4), tinggi pinggul (X5), lebar pinggul (X6), tinggi pundak (X7), lingkar cannon (X8), lebar kelangkang (X9) dan panjang kelangkang (X10); sedangkan pada jantan sapi PO vs sapi Bali adalah dalam dada (X3), lingkar dada (X4) Penggolongan berdasarkan skor diskriminan Fisher menunjukkan salah penempatan antara jantan sapi PO vs sapi Pesisir dan jantan sapi Bali vs sapi Pesisir. Hasil analisis Wald-Anderson yang diperoleh menunjukkan bahwa tidak terdapat kesalahan penempatan pada jantan sapi PO vs sapi Pesisir dan sapi Bali vs sapi Pesisir dengan hasil koreksi 100%. Jantan sapi PO vs sapi Bali, pengelompokan berdasarkan skor Diskriminan Fisher menunjukkan hasil yang sama dengan pengelompokan Wald-Anderson, yaitu jantan sapi PO dan sapi Bali termasuk kedalam kelompok yang sama dengan hasil koreksi 58,97%. Pengolongan berdasarkan analisis Wald-Anderson lebih dapat diterima karena memberikan hasil yang lebih teliti dan akurat. Hasil yang diperoleh berdasarkan analisis jarak minimum D2 Mahalanobis menunjukkan terbentuknya jarak ketidakserupaan morfometrik ukuran-ukuran tubuh jantan sapi PO vs sapi Bali sebesar 5,379, jantan sapi PO vs sapi Pesisir sebesar 5,383 dan jantan sapi Bali vs sapi Pesisir sebesar 5,54. Dendogram ketidakserupaan morfometrik membentuk pembagian ukuran-ukuran tubuh jantan sapi yang diamati. Jantan sapi PO dan sapi Bali membentuk satu kelompok dan jantan sapi Pesisir membentuk satu kelompok lain. Kesimpulan yang diperoleh pada penelitian ini yaitu ditemukannya penggolongan jantan sapi PO, Bali dan Pesisir berdasarkan ukuran-ukuran tubuh, sehingga memberikan informasi kedekatan morfometrik ukuran-ukuran tubuh antara jantan sapi yang diamati.
Keyword: Indonesian local cattle, morphometric, Fisher Discriminant analysis, Wald-Anderson analysis

Judul: Penggolongan morfometrik jantan sapi bali, peranakan ongole dan pesisir melalui analisis diskriminan fisher, wald anderson dan jarak minimum D2 Mahalanobis
Abstrak: Indonesian local cattle as local cattle genetic resources require special attention for conservation purpose as well as meat-producing. Study on the morphometric characteristics of the local cattle Indonesia is one of the scientific information that can be used as the basic for development in conservation efforts. This study aimed was at characteristing the body size of male Bali, PO and Pesisir cattles. The experiment was conducted at Mitra Tani Farm; Rumah Pemotongan Hewan (RPH) Pancoran Mas, Depok and Balai Penyuluhan dan Peternakan Lengayang South Coastal District of West Sumatera. The animals observed were 32 Bali, 46 PO and 17 Pesisir cattles. Measurements include body length, chest width, chest depth, hearth girth, hip height, hip width, wither height, cannon circumference, thurl width, and rump length. Data were analyzed using descriptive analysis, T2 Hotelling analysis, Discriminant Fisher analysis, Wald-Anderson classification and minimum distance D2 Mahalanobis. The result of the analysis of T2 Hotelling and Discriminant Fisher analysis showed differences in body measurements of male PO vs Pesisir cattles, PO vs Bali cattles and Bali vs Pesisir cattles. Classification of Wald-Anderson analysis shows that there were classification error between PO vs Pesisir catlles and Bali vs Pesisir cattles, while the male PO vs Bali in the same classification. Minimum distance D2 Mahalanobis analysis showed the formation of the distance nonsimilaritas morphometric measurements bodies of PO vs Bali catlles for 5.379, PO vs Pesisir cattels for 5.383 and Bali vs Pesisir cattles for 5.54. Dendogram nonsimilaritas morphometric provided distribution of male body size cattle. Male PO and Bali cattles from one group and one male Pesisir cattle formed another group. Conclusions obtained in this study is the discovery of the classification of male Bali, PO and Pesisir cattles based on body measurements, thus providing information morphometric measures of closeness between a male cattle body.
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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