Judul: Laju pertumbuhan dan tanggapan faal itik muda yang di pelihara pada kepadatan ternak dan sistim lantai yang berbeda
Abstrak: An experiment has been conducted to asses the optimum stocking density for Alabio ducks, based on their productive and physiological responses. Five hundred Alabio female ducks were reared under the same condition up to two weeks of age and were then transferred to two floor systems (deep litter and slatted bamboo floor) and five stocking densities (10, 215, 20, 25 and 30 birds/m ). At six weeks of age stocking density were changed to 4, 6, 8, 10 and 12 birds/m2 for the remainder of the experiment. Three replicates of 15 birds were used per treatment. The experimental design, was the split-plot block. Parameters measured were body weight gain, water used, feed consumption, feed conversion ratio, mortality, weight of spleen, adrenal and thyroid glands, hematocrit, some blood biochemical levels, micro climate in the pens. Some behavioural observations were also made. The results of the experiment at two to six weeks of age showed that high stocking density had a significantly effect on retarding growth, reducing feed efficiency, increasing mortality, reducing spleen absolute weight, reducing serum triglycerides level, increasing temperature in pens and causing poorer feathering condition.
Keyword: Young Ducks;, Biokimia unggas;, Itik alabio;, Bogor Agricultural University;

Judul: Pendugaan Umur Itik Alabio dan Cihateup Berdasarkan Tempat Tumbuh Bulu Tetap pada Bagian-Bagian Tubuh
Abstrak: Duck selection for replacement is difficult for farmers, as day old duck (DOD) are generally sold in a group although they have different ages. The purpose of this study was to estimate the age of ducks (cihateup and alabio) through the growth of fixed feather on the body. A total of 143 alabio ducks eggs originate from Borneo and 32 cihateup ducks from Tasikmalaya had hatched in Animal Husbandry Hatching Laboratory then grew up at the Field Laboratory of Poultry Production, Bogor Agricultural University. The results showed that the overall changing of hatching feathers into fixed feathers on both types of ducks is observes successively from the chest, armpits, upper back, tail, lower back, neck, wing primary and secondary wings. The alabio ducks hatching feathers substitution into fixed feathers were faster than cihateup ducks. Cihateup ducks showed changing of hatching feathers into fixed feathers in its chest in weeks 4, while the alabio ducks showed changing in the chest, armpit and upper back on the same week. Alabio ducks changed all the fixed feathers in their body on weeks 6, mean while cihateup duck on weeks 7.
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Judul: Analisis dan Implementasi Certificate Authorities (CA) pada Public Switched Telephone Network (PSTN)
Abstrak: Secure Telephone Protocol has ability to authenticate involved party and keep the secrecy of the message sent over the protocol. The secrecy of the message archieved by using symmetric key cryptographic scheme, and authentication archieved using public key cryptographic scheme. One of several party involved in the protocol and hold an important function called Certificate Authorities or CA. CA responsible for generating public key pair for other party involved in the protocol. When CA generates public key pair, several primitive cryptographic scheme used for guarantee the security of the key. Two of them are hash function SHA-1 and El-Gamal public key scheme embedded in Digital Signature Algorithm scheme. The prototype implementing the scheme above developed using Java programming language with JCE addition from Bauncy Castle. The analysis towards implemented prototype indicates that the prototype still has some flaws to be implemented in real world.
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