Judul: Penggunaan Distillers Dried Grains with Solubles (DDGS) dan hominy feed pada pakan ikan kerapu bebek cromileptes altivelis
Abstrak: DDGS is a by-product in the production of bioethanol that is mainly derived from corn, while the hominy feed is a by-product of corn milling process on the production of corn flour for food. This study aims to examine the influence of the use of DDGS and hominy feed on the growth performance of humpback grouper Cromileptes altivelis. This research was conducted in June to October 2010 in floating net cage in Suak Panjang, Pahawang Island, Punduh Pidada sub-district, Pesawaran district, South Lampung and Fish Nutrition Laboratory, Department of Aquaculture, Faculty of Fisheries and Marine Sciences, Bogor Agricultural University. This research used experimental methods Completely Randomized Design (CRD) with three treatments and two replicates respectively. The treatment in this study namely Diet A (diet without DDGS and hominy feed), Diet B (diet with DDGS and hominy feed 10%), and Diet C (diet with DDGS and hominy feed 19%). Fish weights 11.6-14.6 gram were reared in net cage (3x1x2)m3 at densities of 55-56 fish/m2. Fish were fed 3 times daily at satiation level. In ordered to keep fish in good condition net cage were wash weekly. The results showed that fish fed Diet B (DDGS and hominy feed 10%) have similar growth performance to those fish fed Diet A and higher when being compared to the rest. It is concluded that DDGS and hominy feed at the level of 10% can be used in the diet of humpback grouper.
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Judul: Penggunaan Destillers Dried Grain with Solubles (DDGS) Jagung sebagai Sumber Protein Nabati Pakan Benih Ikan Gurame Osphronemus gouramy Lac.
Abstrak: This experiment was conducted to examine the effect of the use of DDGS as a source of vegetable protein on the growth of the giant gouramy O. gouramy Lac. juvenile. Feed is devided into two, the feed for testing of digestibility and testing of growth. The feed for testing of digestibility are References Diet (100% control of feed) and Test Diet (70% of control feed and 30% of DDGS), while the feed for testing of growth are 0%, 10%, 20%, and 30% DDGS. The fish were feed the experimental diet at satiation. Giant gouramy be used in this research have weight 4.72±0.78 g. Culture of fish conducted during 40 days in the aquarium sized 50x40x35 cm. Test of growth from DDGS up to 30% showed no significant difference (P>0.05) in daily growth rate (2.82 to 2.91%), survival rate (100%), feed consumptions (139.07-159.22 g), and feed efficiency (64.52-71.05%). Whereas, protein retention (16.29 to 25.02%), lipid retention (31.36 to 53.52%) are significantly different with control. It is conclude that the use of DDGS as the source of vegetable protein with various consentration on the feed of giant gouramy until 30% didn’t affect the daily growth rate, survival rate, and feed consumptions. The highest feed efficiency of DDGS treatment is 20%.
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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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