Judul: Studi bobot badan dan ukuran-ukuran tubuh domba ekor gemuk di pulau Madura dan rote
Abstrak: The body measurements can be used to estimate body weight. It is more practical to used it in field and it has high accuracy without weight processing. Therefore, the aims of this study was to estimate body weight based on body measurements. In addition, this study were aimed to estimate body weight differences at two different locations and to determinate the best equation which can be used to estimate body weight of fat-tailed sheep at Madura Island and Rote Island.
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Judul: Estimasi Bobot Badan berdasarkan Ukuran Tubuh pada Sapi Madura yang Dipelihara secara Intensif
Abstrak: Bobot badan menjadi parameter penting dalam manajemen pembibitan, namun pengukurannya sulit dilakukan karena keterbatasan fasilitas timbangan. Tujuan dari penelitian ini adalah menganalisa hubungan antara variabel antara ukuran linier tubuh dan bobot badan pada sapi madura dengan sistem pemeliharaan intensif. Penelitian ini menggunakan 85 sampel data morfometrik, seperti panjang badan, lingkar dada, tinggi pundak, dan bobot badan yang dikategorikan berdasarkan umur dan jenis kelamin lalu dianalisis dengan metode bivariat Pearson dan regresi linier sederhana. Analisis data dilakukan secara berurutan dari analisis deskriptif hingga uji signifikansi pada taraf 5%. Hasil penelitian menunjukkan bahwa nilai koefisien korelasi dan determinasi tertinggi serta nilai RMSE terendah dari persamaan regresi terdapat pada hubungan variabel lingkar dada dengan bobot badan pada setiap kategori. Salah satu contoh persamaan regresi pada hubungan variabel lingkar dada dengan bobot badan pada sapi madura jantan 205 hari adalah Y=-163,333+2,431X dengan nilai RMSE, R2, dan r masing-masing 2,092, 0,976, dan 0,988, serta memiliki hubungan yang signifikan. Oleh karena itu, variabel lingkar dada dapat digunakan untuk estimasi bobot badan pada sapi madura., Body weight is an important parameter in breeding management, but its measurement is difficult due to limited weighing facilities. This study aims to analyze the correlation between variables between linear body size and body weight in madura cattle cared under intensive rearing system. This study used 85 samples of morphometric data, such as body length, chest girth, wither height, and body weight which categorized based on age and sex, and then analyzed using the Bivariate Pearson method and simple linear regression. The analysis was carried out sequentially from descriptive analysis to significance test at the 5% level. The results showed that the highest correlation and determination coefficient values and the lowest RMSE values from the regression equation were found in the correlation between chest girth and body weight in each category. An example of a regression equation on the correlation between chest girth and body weight in a 205-day-old madura calf is Y=-163,333+2,431X with RMSE, R2, and r values of 2.092, 0.976, and 0.988, and has a significant result. Therefore, the chest girth can be used to estimate body weight in madura cattle.
Keyword: body weight, madura cattle, morphometric, simple linear regression

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