Judul: Studi Morfometrik Pendugaan Bobot Badan Ayam Kampung di Ciamis, Tegal dan Blitar Melalui Analisis Regresi Komponen Utama
Abstrak: Kampong chicken is one of the local chicken in Indonesia which spread across the region. The spread of Kampong chicken in Ciamis, Tegal and Blitar can give andescriptionthe diversity of body size and body weight Kampong chicken on the island of Java. This study aims to determine the relationship between linear measures of body surface to body weight and body weight of chickens suspected Kampung based measurements at the observation site Ciamis, Tegal and Blitar. T2-Hotelling statistic is used to determine the difference in linear measures of body Kampong chickens were observed. T2-Hotelling statistic results showed that Kampong chickens are observed very different from one another. Difference is due to differences environment and the decision of farmers selecting. Principal Component Regression Analysis (ARKU) was used to estimate weight based on linear measures of body Kampong chickens were observed. The results of statistical calculations show that the 12 variables observed to be very influential on the weight of Kampong chicken Ciamis, Tegal and Blitar, both in males and females. The highest elasticity values obtained in the village of Ciamis male chicken is a shank length of 0,311, while the male village of Tegal chicken and Blitar contained in the variable width of the chest amounted to 0,378 and 0,437. Kampong chicken in location Blitar and Ciamis, females have the highest elasticity value in the variable shank circumference;, each of which is obtained for 0,327; 0,333, while in the village of Tegal chicken females have the highest elasticity value in the variable length of the third finger of 0,228. The highest elasticity values should not be used as reference in the estimation of body weight. increase in the % of variable can be used to predict the observed increase in body weight percentage of the value of elasticity obtained. Practicality of estimating body weight in the field are preferred
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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: Nanokristalin Pirit (FeS2) sebagai Material Semikonduktor Fotovoltaik.
Abstrak: Teknologi fotovoltaik adalah suatu proses yang dapat mengubah sinar matahari menjadi energi listrik dengan media semikonduktor. Penggunaan sel surya untuk fotovoltaik hanya dapat mengonversi radiasi matahari menjadi energi listrik kurang dari 20%. Efisiensi akan meningkat ketika material semikonduktor untuk fotovoltaik dibuat menjadi ukuran nano. Pirit merupakan salah satu material semikonduktor fotovoltaik yang memiliki energi pita celah (Eg) dalam kisaran 0.8–0.95 eV. Energi pita celah tersebut terbukti meningkat ketika disintesis dengan metode hidrotermal menggunakan beragam molar [S]:[Fe] pada suhu 200 °C dalam 24 jam. Nilai energi pita celah yang dihasilkan adalah 1.58–2.073 eV. Ukuran nanokristalin pirit yang dihasilkan berada pada kisaran 21.04–58.77 nm menurut data Particle Size Analyzer. Besarnya ukuran nanokristal pirit yang tumbuh kurang dari 50 nm merupakan poin penting untuk aplikasi fotovoltaik.
Keyword: Hidrotermal, fotovoltaik, nanokristal, pirit