Judul: Selection to improve birth and weaning weight of Javanese Fat Tailed Sheep
Abstrak: In Indonesia, the javanese Fat Tailed Sheep is very popular domestic animal for its meat production. However, selection to increase body weight has never been done by local farmers. As a result the variability of body weight is high, and expected that application of a selection program can improve this trait. Two step of selection were done in order to improve birth and body weight. In the first selection, the elite group was established by selecting the best 40 females and 3 males from 12500 sheep reared by local farmers based on their mature body weight and tail length.
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Judul: Karakteristik Pertumbuhan Pra dan Pascasapih Domba Lokal di Unit Pendidikan dan Penelitian Peternakan Jonggol Institut Pertanian Bogor (UP3J-IPB)
Abstrak: Selection program on sheep needs some important factors like season, sex, body weight and age of dam. This research was aimed to get the characteristic of pre and post-weaning growth of local sheep in Jonggol Animal Science Teaching and Research Unit (JASTRU) IPB and selection criteria. The result can be used as a basic information on selection program to grade up the genetic properties of these sheep. This research located at JASTRU IPB, Singasari Village, sub district of Jonggol from June 2007 to May 2008 which represent two different seasons, rainy and dry. The number of sheep in the beginning of research was 154 head and in the end of research was only 33 head. The result showed that the value of Temperature Humidity Index were on slight and adequate heat. Statistic t test showed that there was a significant difference (p<0,05) between male and female birth weight in rainy season but in age of 90 and 180 day showed no significant difference. Also, birth weight between rainy and dry season was significantly different (P<0,05) and body weight on age 90 and 180 day was not significantly different. Variance analysis showed that age of dam significantly affected the male birth weight in dry season (p<0,05) and female birth weight in rainy season (p<0,05). The highest lamb body weight was owned by lamb from 2,5 to 3,0 years of dam. Pre-weaning weekly average daily gain (ADG) was higher than that of post-weaning, both on male and female, and rainy and dry season. Body weight on age 90 day can be used as a selection criteria and selection on dam can be done at age 1 to 2 years of age. Selection response of 90 day weight in dry season was higher than that of rainy season.
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Judul: Pemodelan Generasi Harmonik Ketiga pada Kristal Perovskite (MAPbI3) Menggunakan Model Ikat Hiperpolarisabilitas Sederhana .
Abstrak: Methylammonium Lead Iodide (MAPbI3) merupakan material perovskite bersifat semikonduktor dengan bentuk kristal ortorombik pada struktur permukaan dan tetragonal pada struktur bulk kristal di suhu ruang dan memiliki respon nonlinier ketika dikenai sinar intensitas tinggi. Tujuan dari penelitian ini adalah mengkarakterisasi MAPbI3 dari segi respon optiknya ketika dikenai medan masukan, dan membuat model dari respon harmonik ketiga pada material tersebut untuk sembarang polarisasi, serta menguraikan intensitas radiasi third harmonic generation (THG) dalam bentuk grafik dan persamaan intensitas menggunakan model ikat hiperpolarisabilitas sederhana (SBHM). Perhitungan intensitas THG dimulai dengan menentukan vektor-vektor ikatan atomik dan mencari tensor suseptibilitas material serta membandingkan hasil tensor dengan tensor literatur. Kemudian intensitas dicari meggunakan persamaan polarisasi yang juga akan menghasilkan persamaan medan jauh dan intensitas. Analisis fase intensitas dilakukan berdasarkan grafik yang dihasilkan. Terdapat 4 puncak bernilai nol setiap kelipatan 90° pada polarisasi s-s dan p-p dan 8 puncak bernilai nol setiap kelipatan 45° pada polarisasi s-p dan p-s. Simetri permukaan dan bulk memiliki grafik fase yang sama.
Keyword: MAPbI3, generasi harmonik ketiga, model ikat hiperpolarisabilitas sederhana, optika nonlinier