Judul: Evaluasi kecukupan nutrien sapi fries holland periode laktasi ke-3 dan ke-4 di PT. Taurus Dairy Farm, Cicurug, Sukabumi
Abstrak: The aim of this research was to evaluate dairy cattle performances according to nutrient requirement especially third and fourth lactation period. The measured parameters were body weight, milk production, feed consumption and nutrient balance. The cows were divided into two groups according to the body weight. Those groups were groups of heavier body weight and groups of lighter body weight in each lactation period. According to lactation curve, the peak of milk production was reached at second rnontl~ of lactation period. The heavier cows groups included in third lactation and fourth lactation period were insufficient of energy (Total Digestible Nutrient). In addition, the heavier cows in fourth lactation period suffered crude protein insufficiency. Otherwise, the lighter cows groups included in both lactation period were abundantly required in dry matter, Total Digestible Nutrient, crude protein, calsium, and phosphorus. Keywords : lactation period, milk production, body weight, nutrient balance
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Judul: Evaluasi Kecukupan Nutrisi Sapi Perah di Kawasan Usaha Peternakan Cibungbulang Bogor, Jawa Barat
Abstrak: The study is aimed to evaluate nutritional status of cows and their relation to animal performance at two different seasons (drought and rainy). The study was conducted in two phases. First phase was drought season data collecting for 3 months and the second phase was rainy season data collecting. The sample collected was examined in Dairy Nutrition and PAU laboratories IPB (March – June 2013). Variable was measured including the type and amount of feeds and nutrients offered, milk production and quality, body condition score. The collected data was tabulated and analyzed using descriptive statistic. Comparison between nutrients offered and standard requirement was analyzed using T-test. T-test have also been used to compare nutritional status of animal in rainy and drought seasons. The result showed that farmers in KUNAK have offered sufficient amounts of nutriens for their cows exept for Ca, when drought season came, deficiency of P was also occured. Milk yield tent to decrease during drought season but milk fat content increase during drought season but milk fat content increased. It is concluded that imbalance ration is one of the cause for low average milk production in KUNAK.
Keyword: nutrient adequacy, milk quality, milk production, dairy cows

Judul: Analisis Keamanan Skema El-Gamal Signature pada Penandaan Digital.
Abstrak: Bertukar informasi merupakan hal yang sering dilakukan, namun menjadi sulit dilakukan dikarenakan adanya pihak yang tidak berwenang mampu mengakses bahkan memalsukan informasi tersebut. Hal ini disebabkan karena sebuah infomasi yang dipertukarkan sulit dipastikan keasliannya, oleh sebab itu informasi yang dipertukarkan akan diberikan sebuah tanda unik agar kerahasiaan dan keaslian informasi dapat dijaga keamanannya oleh pihak yang bertukar informasi. Penandaan informasi yang dibubuhkan pada suatu dokumen digital dikenal sebagai digital signature, yang merupakan salah satu teknologi yang digunakan untuk meningkatkan keamanan jaringan pada dokumen berbentuk digital. Digital signature dapat memastikan bahwa data yang dipertukarkan adalah data yang sebenarnya dan ada dua syarat kemanan jaringan yang dipenuhi yaitu Authenticity dan Nonrepudation. Untuk membuat tanda tangan digital diperlukan teknik matematika yang dikenal dengan kriptografi. Salah satu metode yang digunakan untuk membuat tanda tangan digital adalah skema El-Gamal signature. Pada bahasan kali ini akan dijelaskan mengenai mekanisme penandaan digital menggunakan metode El-Gamal signature serta bagaimana cara menerapkannya pada perangkat lunak Maple 13.
Keyword: digital signature, El-Gamal, penandaan