Judul: Kinerja Produksi Elver Ikan Sidat Anguilla bicolor bicolor Berbobot Awal 3 g/ekor dengan Padat Tebar 2 g/L, 3 g/L, dan 4 g/L dalam Sistem Resirkulasi
Abstrak: Eels are one of the potential aquaculture commodities but the production technique has not been developed yet. The purpose of this research was to analyze the production performance of eels elver Anguilla bicolor bicolor at different stocking densities: 2 g/L, 3 g/L, and 4 g/L. Initial weight was 3 g/fish. Fish cultured in recirculation system the survival rate and growth performance were observed for 40 days. The experiment was design used Completely Randomize Design (RAL) with 3 replications for each treatment. The data that were obtained consist of survival rate, speed growth rate, weight variance coefficient, and feed conversion ratio. Increasing stocking density enhanced growth performance and decreased the feed conversion. The results showed that the highest growth rate of biomass was produced by the stocking density of 4 g/L of 7.79 g/day compared to those of stocking density of 2 g/L of 3.71 g/day and stocking density 3 g/L of 6.40 g/day.
Keyword: stocking density, growth, Anguilla bicolor bicolor

Judul: Produksi Ikan Sidat Anguilla marmorata Stadia Elver dan Anguilla bicolor bicolor Stadia Yellow Eel dengan Padat Tebar 0.5, 1.0, 1.5 g/l pada Sistem Resirkulasi
Abstrak: Anguilla spp is a highly economical value fish resource in Indonesia. Eel is a diadromous fish or fish that spawn in the sea, grow and thrive in fresh water, and return to the sea to spawn. The objective of this study was to determine the most optimum stocking density for two different species of eel A. Marmorata and species of eel A. bicolor bicolor in recirculating aquaculture system. Three stocking densities were applied in this study 0.5, 1.0, and 1.5 g/l. The experiments were performed using a concrete tank of 1.7 x 1.7 x 1 m3 at volume of 1,500 liters of circulating water. The fish used was elver stage eels (1.2-1.5 g) and yellow eel stage (15-17 g). The fish were feed with paste artificial feed at a restricted feeding level. The fish survival was relatively high (elver: 69.5 to 91.28% and yellow eel: 75.68 to 92.50%). The specific growth rate was also relatively good (elver: 0.57 to 0.61% and yellow eel: 3.48 to 3.77%). Feed efficiency was low for elver size (0.86 to 3.88%) but considerably high for yellow eel stage fish (29.11 to 50.40%). The highest growth and productivity of eel culture in a recirculating aquculture system was shown at a stocking density of 1.0 kg/m3.
Keyword: recirculating., rearing density, productivity, eel

Judul: Analisis keamanan konstruksi fungsi hash berbasis sandi blok kunci simetrik (Kajian Teoritik)
Abstrak: Hash function is used to secure the integrity and authenticity of a massege, so that the message is save. The message which will be secured, will be attached to hash/message digest/digital signature value fro, the message. A secure hash function is the one which has pre-image resistance, 2nd pre-image resistance and collision resistance. Hash function has been classified into hash keyed function (Message Authentication Codes/MAC) and unkeyed (Modification Detection Codes/MDC)
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