Judul: Estimation of the Body Weight Potency of Juvenile Female Kampung Chicken Based on Principal Component Regression Analysis.
Abstrak: Pendugaan potensi bobot badan ayam kampung betina remaja berdasarkan delapan variabel permukaan tubuh linear di tiga wilayah dengan ketinggian yang berbeda dilakukan dalam penelitian ini. Ayam kampung betina remaja dipelihara secara ekstensif memiliki habitat hidup yang luas dan tumbuh berkembang sesuai dengan kondisi lingkungan. Penelitian ini menggunakan 52 ekor ayam kampung betina remaja yang bertujuan untuk membentuk persamaan ARKU kemudian diperoleh nilai elastisitas untuk mengukur variabel yang paling berpengaruh terhadap bobot badan ayam kampung remaja yang telah beradaptasi pada lingkungan. Variabel-variabel ukuran permukaaan tubuh linear yang diukur pada ayam kampung betina remaja di dataran rendah, dataran sedang, dan dataran tinggi adalah sama, yaitu panjang femur (X1), panjang tibia (X2), panjang tarsometatarsus (X3), lingkar tarsometatarsus (X4), panjang jari ketiga (X5), panjang sayap (X6), panjang maxilla (X7), dan tinggi jengger (X8). Semua variabel ukuran yang diamati berpengaruh signifikan terhadap persamaan estimasi berat badan menggunakan semua variabel. Panjang sayap (X6) merupakan variabel yang paling berpengaruh terhadap perubahan bobot badan pada ayam kampung remaja betina di berbagai dataran., Estimation of the potential body weight of juvenile female kampung chickens based on eight linear body surface variables in three areas with different altitudes was carried out in this study. Juvenile female kampung chickens are reared extensively in various living habitats and grow and develop according to environmental conditions. This research used 52 juvenile female kampung chickens to form an equation through PCRA and then obtain elasticity values to measure the variables that most influence the body weight of juvenile village chickens that have adapted to the environment. The linear body surface size variables measured in juvenile female kampung chickens in the lowlands, midlands, and highlands are the same, namely femur length (X1), tibia length (X2), tarsometatarsus length (X3), tarsometatarsus circumference (X4), third finger length (X5), wing length (X6), maxilla length (X7), and comb height (X8). All observed size variables significantly affect the body weight estimation equation using all variables. Wing length (X6) is the variable that most influence changes in body weight in juvenile female village chickens in various plains.
Keyword: Ayam kampung, ARKU, Pendugaan Bobot

Judul: Estimation of Chicken Body Weight IPB-D2 and IPB-D3 in Grower Period Based on Principal Component Regression Analysis
Abstrak: Ayam IPB-D2 dan ayam IPB-D3 merupakan hasil seleksi dari ayam IPB-D1 berdasarkan sifat tahan penyakit dan pertumbuhan bobot badan cepat. Penelitian ini bertujuan untuk mendapatkan persamaan pendugaan bobot badan berdasarkan delapan variabel permukaan tubuh linear. Berdasarkan persamaan tersebut ditentukan variabel yang paling lentur terhadap perubahan bobot badan ayam IPB D2 dan IPB-D3. Metode penelitian yang digunakan adalah Analisis Regresi Komponen Utama (ARKU). Penelitian ini menggunakan ayam IPB-D2 dan IPB D3 umur 10 minggu dengan total sebanyak 90 ekor. Variabel-variabel ukuran permukaan tubuh linear yang diukur yaitu panjang femur (X1), panjang tibia (X2), panjang tarsometatarsus (X3), lingkar tarsometatarsus (X4), panjang jari ketiga (X5), panjang sayap (X6), panjang maxilla (X7), dan tinggi jengger (X8). Semua variabel yang diamati berpengaruh nyata terdahap bobot badan sehingga persamaan pendugaan bobot badan memasukkan semua variabel. Panjang sayap (X6) merupakan variabel yang paling berpengaruh terhadap perubahan bobot badan pada ayam IPB-D2 dan IPB-D3., IPB-D2 chickens and IPB-D3 chickens are the result of selection from IPB-D1 chickens based on disease resistance characteristics and fast body weight growth. This study aims to obtain an equation for estimating body weight based on eight linear body surface variables. Based on this equation, it was determined that the most flexible variable to changes in body weight of IPB-D2 and IPB-D3 chickens. The research method used is Principal Component Regression Analysis (ARKU). This study used IPB-D2 and IPB-D3 chickens aged 10 weeks with a total of 90 chickens. The linear body surface size variables measured were femur length (X1), tibia length (X2), tarsometatarsus length (X3), tarsometatarsus circumference (X4), third finger length (X5), wing length (X6), maxilla length ( X7), and comb height (X8). All the variables have a real impact to bodyweight so that bodyweight estimation equations include all variables. Wing length (X6) is the most influential variable on body weight of IPB-D2 and IPB-D3 chickens.
Keyword: bodyweight estimation, IPB-D2 line chickens, IPB-D3 line chickens, principal component regression

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