Judul: Live Body Weight Estimation of Garut Sheep Based on Different Linear Body Measurement
Abstrak: Pendugaan bobot badan ternak dengan menggunakan pengukuran tubuh lebih mudah, dan murah bagi peternak rakyat, namun sering terjadi kendala ketidakakuratan dalam memperkirakan bobot hidup ternak. Penelitian ini bertujuan mengkaji bobot hidup domba garut berdasarkan tinggi pundak, panjang badan, dan lingkar dada badan melalui rumus analisis regresi linier. Penelitian ini menggunakan data sekunder dengan jumlah 78 ekor domba garut yaitu 34 ekor jantan dan 44 ekor betina. Hubungan bobot badan dengan ketiga variabel ukuran linier dianalisis menggunakan persamaan regresi linier. Persamaan regresi linier untuk domba jantan muda (I0) dengan ukuran tinggi pundak adalah y=- 55,39+1,3560x, panjang badan y=-48,75+1,3620x, dan lingkar dada adalah y=- 38,52+0,8834x. Selanjutnya, persamaan regresi domba jantan dewasa (I1-I3) dengan ukuran tinggi pundak adalah y=-102,3+2,1450x, panjang badan y=- 63,72+1,7540x, dan lingkar dada y=-75,79+1,4030x. Persamaan regresi linier k domba betina muda (I0) dengan ukuran tinggi pundak adalah y=-13,14+0,5978x, panjang badan y=-10,90+0,6233x, dan lingkar dada adalah y=-1,821+0,3340x. Sedangkan persamaan regresi domba betina dewasa (I1-I3) dengan ukuran tinggi pundak adalah y=-41,35+1,2070x, panjang badan y=-16,30+0,9337x, dan lingkar dada y=-30,85+0,7795x, nilai y sebagai bobot badan (kg) dan nilai x sebagai ukuran linier tubuh domba (cm). Kesimpulan dari penelitian adalah domba garut muda (I0) memiliki koefisien korelasi yang lebih tinggi dibandingkan domba domba garut berumur dewasa (I1-I3)., Estimate the live body weight of livestock using the linier body measurements is easier and cheaper for smallholder breeders, but there are often inaccuracies in estimate live weight of livestock. The aim of this study to estimate the live body weight of garut sheeps based on height at wither, body length, and chest circumference through linier regression analysis formulas. This study use secondary data with a total of 78 garut sheeps, namely 38 males and 44 females. The relationship between body weight and the three linear size variables was analyzed using linear regression. The linear regression equation for young males (I0) on shoulder height is y=-55.39+1.3560x, body length y=-48.75+1.3620x, and chest circumference is y=-38.52+0, 8834x. The linear regression equation for adult males (I1-I3) on shoulder height is y=-102.3+2.1450x, body length y=- 63.72+1.7540x, and chest circumference y=-75.79+1 ,4030x. The linear regression equation for young females (I0) on shoulder height is y=- 13.14+0.5978x, body length y=-10.90+0.6233x, and chest circumference is y=- 1.821+0.3340x. The linear regression equation for adult females (I1-I3) on shoulder height is y=- 41.35+1.2070x, body length y=-16.30+0.9337x, and chest circumference y=-30.85+0 ,7795x, the value of y as body weight (kg) and the value of x as a linear measure of the sheep's body, namely chest circumference (cm).The conclusion in this study is young garut sheeps (I0) had a higher correlation coefficient than the adult (I1-I3) garut sheeps.
Keyword: analysis regression, garut sheeps, linear body measurement, live body weight

Judul: Estimation Of Body Weight Kisar Sheep with Linear  Regression Analysis Approach to Body Size
Abstrak: Bobot badan merupakan salah satu tolak ukur dalam menentukan pakan, produksi daging, penentuan harga jual beli benih dan pemilihan generasi ternak. Penelitian ini bertujuan untuk mengkaji hubungan lingkar dada, panjang badan, tinggi pundak, lebar dada, dalam dada dengan bobot badan domba kisar menggunakan rumus analisis regresi. Sebanyak 90 ekor domba kisar yang terbagi dalam 45 ekor domba jantan dan 45 ekor domba betina yang dikelompokkan berdasarkan umur dan jenis kelamin digunakan untuk menentukan pendugaan bobot badan domba kisar berdasarkan ukuran linear tubuh. Analisis data yang digunakan dalam penelitian ini menganalisis hubungan antara ukuran tubuh dan berat badan domba, rumus yang digunakan adalah analisis regresi linear dengan persamaan y = a + (b ± Sb). Rumus pendugaan bobot badan domba kisar melalui variabel ukuran linear tubuh menunjukkan hasil yang paling akurat dengan nilai korelasi tertinggi ialah pada domba kisar betina umur I0 dan umur I2 ialah variabel lebar dada, sedangkan pada domba kisar betina umur I1 nilai korelasi tertinggi terjadi pada variabel panjang badan. Sedangkan domba kisar jantan umur I0 variabel lebar dada memiliki nilai korelasi tertinggi, pada umur I1 nilai korelasi tertinggi terjadi pada variabel tinggi pundak, dan pada umur I2 variabel tertinggi yaitu pada panjang badan. Rumus pendugaan bobot badan pada domba kisar jantan dan betina menunjukkan hasil yang berbeda nyata pada nilai intersep dan koefisien regresinya, sehingga perlu adanya pemisahan rumus. Sebaran data yang diperoleh pada hasil penelitian ini berbentuk linear., Bodyweight is one of the criteria used to determine feed, meat production, buying and selling prices, and livestock generation selection. Using the regression analysis formula, this study will look at the relationship between sheep's chest circumference, body length, shoulder height, chest breadth, chest depth, and body weight. To estimate the body weight of the Kisar sheeps based on morphometric size, a total of 90 kisar sheeps were used, divided into 45 male and 45 female sheep and grouped by age and sex. The data in this study was analyzed using age equalization, and then linear regression analysis with the equation y = a + (b Sb) x was used to determine the relationship between body size and bodyweight of sheep. The chest width variable had the highest correlation value in female Kisar sheep aged I0 and I2, while the body length variable had the best correlation value in Kisar sheep aged I1. While the male Kisar sheep's variable chest width had the highest correlation value at age I0, shoulder height had the highest correlation value at age I1, and body length had the highest correlation value at age I2.
Keyword: Analysis regression, bodyweight, kisar sheeps, linear body size

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