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: Estimasi Bobot hidup Berdasarkan Ukuran Linier Tubuh pada  Pedet Lepas Sapih Sapi Simmental dan Limousine
Abstrak: Estimasi bobot hidup pada seekor sapi dapat memudahkan dalam mengetahui bobot aktualnya. Salah satu cara mengestimasinya dengan menggunakan ukuran linier tubuh sapi. Penelitian ini bertujuan menduga bobot hidup berdasarkan ukuran linier tubuh pedet lepas sapih Simmental dan Limousine. Penelitian menggunakan data sekunder yang diperoleh dari Balai Pembibitan Ternak Unggul dan Hijauan Pakan Ternak Padang Mengatas. Total sebanyak 128 ekor Sapi Simmental dan Limousine dengan kisaran umur 6-18 bulan, dengan perbandingan 26 ekor jantan Simmental, 50 ekor betina Simmental, 19 ekor jantan Limousine, dan 33 ekor betina Limousine digunakan pada penelitian ini. Metode analisis data dengan regresi linier berganda. Penelitian ini menunjukkan bahwa pendugaan bobot hidup dengan menggunakan ukuran linier tubuh pada sapi Simmental dan Limousine pada fase pedet lepas sapih menghasilkan persamaan Y = -401,98 + 0,96(PB) + 2,71(LD) + 1,15(TP) dengan nilai koefisien determinasi (R2) sebesar 90,91% dan nilai standar error 13,07kg. Secara keseluruhan hasil pendugaan tidak berbeda nyata dengan bobot aktualnya., Live weight estimation in a cow can make it easier to know the actual weight. One way of estimating it is by using the linear size of the cow's body. The aim of this study was to estimate live weight based on body linear measurements of Simmental and Limousine weaning calves. The study used secondary data obtained from the Center for Superior Cattle Breeding and Forage Animal Feed Padang Atas. A total of 128 Simmental and Limousine cattle with an age range of 6-18 months, with a comparison of 26 Simmental males, 50 Simmental females, 19 Limousine males, and 33 Limousine females were used in this study. Method of data analysis with multiple linear regression. This study showed that the estimation of live weight using linear body measurements in Simmental and Limousine cattle in the weaning calf phase resulted in the equation Y = -401.98 + 0.96(PB) + 2.71(LD) + 1.15(TP). Result equation with a coefficient of determination (R2) of 90.91% and a standard error of 13.07kg. Overall, the estimation results are not significantly different from the actual weights.
Keyword: body linear, live weight, regression, body linear, live weight, 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