Judul: Variabel Pembeda Ukuran Tubuh Kambing Peranakan Etawah (PE) Betina di Tiga Peternakan Berbeda
Abstrak: The purpose of this research was to determine the differences among surface linear measurement body morphometric characteristics of BPTU KDIHPT Pelaihari, Cordero Farm, and Doa Anak Yatim Farm Etawah Grade goat females. Number of Etawah Grade goat females be observed were 90 heads (30 heads of each). Variables measured were shoulder height, hip height, body length, chest width, depth chest, hip width, rump length, chest circumference and cannon circumference. The data was analyzed with T2-Hotelling test, Fisher discriminan analysis, Wald-Anderson and D2-Mahalanobis minimum distance. Discriminator variables between BPTU KDI-HPT Pelaihari vs Cordero Farm Etawah Grade goat females were depth chest, rump length, chest circumference and cannon circumference, whereas those of BPTU KDI-HPT Pelaihari vs Doa Anak Yatim Farm Etawah Grade goat females were shoulder height, hip height, rump length and chest circumference, and those of Cordero Farm vs Doa Anak Yatim Farm Etawah Grade goats were shoulder height and hip height. Unsimilarity body morphometric distance between BPTU KDI-HPT Pelaihari vs Cordero Farm Etawah Grade goat females was 4.617, whereas that of BPTU KDI-HPT Pelaihari vs Doa Anak Yatim Farm Etawah Grade goat females was 5.952 and that of Cordero Farm vs Doa Anak Yatim Farm Etawah Grade goat females was 2.265. BPTU KDI-HPT Pelaihari Etawah Grade goat females was separated from Cordero Farm and Doa Anak Yatim Farm ones . Cordero Farm Etawah Grade goat females formed a category together with Doa Anak Yatim Farm ones conjecturable purpose milk production, whereas BPTU KDI-HPT Pelaihari formed category 2 as Etawah Grade goat females conjecturable purpose meat production.
Keyword: Bogor Agricultural University (IPB), Etawah Grade goat, discriminant analysis, body size discriminator

Judul: Discriminator Variables of Linear Body Measurements on Etawah-grade Does at Sahid Farm Bogor and BPTU-HPT Pelaihari
Abstrak: Kambing PE (Peranakan Etawah) telah menyebar ke berbagai daerah di Indonesia dengan lingkungan yang berbeda-beda. Adaptasi terhadap lingkungan berakibat pada perbedaan ukuran permukaan tubuh linear pada kambing PE. Ukuran permukaan tubuh linear merupakan salah satu sifat kuantitatif yang ditentukan banyak pasang gen (poligenik) dan sangat dipengaruhi lingkungan. Penelitian ini bertujuan untuk mempelajari dan menentukan variabel pembeda kambing PE induk betina pada kondisi gigi I3 antara peternakan Sahid dan Balai Pembibitan Ternak Unggul Hijauan Pakan Ternak (BPTU-HPT) Pelaihari, dengan menggunakan analisis diskriminan. Data sekunder yang diperoleh dari Laboratorium Pemuliaan dan Genetika Ternak Fakultas Peternakan IPB University, digunakan pada penelitian ini. Variabel yang diukur adalah tinggi pundak (X1), tinggi pinggul (X2), panjang badan (X3), lebar dada (X4), dalam dada (X5), lebar pinggul (X6), panjang pinggul (X7), lingkar dada (X8), dan lingkar kanon (X9). Data dianalisis dengan statistik deskriptif, T2 Hotelling, diskriminan Fisher, dan penggolongan Wald-Anderson. Variabel pembeda ukuran permukaan tubuh linear kambing PE induk betina I3 peternakan Sahid dan BPTU-HPT Pelaihari yaitu tinggi pinggul (X2), lebar dada (X4), lebar pinggul (X6), panjang pinggul (X7), dan lingkar kanon (X9). Penggolongan Wald-Anderson menunjukkan satu kambing PE induk betina I3 di BPTU-HPT Pelaihari memiliki kemiripan ukuran tubuh dengan kambing PE induk betina I3 di peternakan Sahid., Etawah-grade (Peranakan Etawah or PE) has dispersed to some regions in Indonesia, where each region has a different environment. Adaptation to the environment causes Etawah Grade goat (PE) variations in linear body surface measurement depending on the region. Linear body surface measurements are quantitative traits determined by some gene pairs (polygenic) and highly influenced by the environment. This research aims to study and determine the discriminator variables of Etawah-grade does between Sahid farm and BPTU-HPT Pelaihari using discriminant analysis. The data will be used in this study as secondary data, obtained from Animal Breeding and Genetics Laboratory, Faculty of Animal Science, IPB University. The measured variables will be withers height (X1), hip height (X2), body length (X3), chest width (X4), chest depth (X5), hip-width (X6), hip-length (X7), chest girth (X8), and cannon circumference (X9). Data were analyzed using descriptive statistics, T2˗Hotelling, discriminant analysis Fisher, and Wald-Anderson. The discriminator variables among linear body surface measurements of Etawah-grade does between Sahid farm and BPTU-HPT Pelaihari are hip height (X2), chest width (X4), hip-width (X6), hip-length (X7), and cannon circumference (X9). The classification of Wald-Anderson showed that one Etawah-grade does on BPTU-HPT Pelaihari has a similar body size to the Etawah-grade does on Sahid farm.
Keyword: discriminator variables, discriminant analysis, etawah-grade does, linear body measurements

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