Judul: Optimalisasi Usaha Budidaya Tambak Ikan Bandeng di Desa Tanjung Pasir, Kecamatan Teluknaga, Kabupaten Tangerang, Provinsi Banten
Abstrak: Tangerang Regency has considerable potential in aquaculture sector. The most prominent aquaculture product in Tangerang Regency is milkfish. Amount of milkfish production was increasing in 2010-2011 period, which was scattered in 29 sub districts, one of them is in sub district Teluknaga, precisely located in Tanjung Pasir Village. The objectives of this research are to identify the characteristics of the aquaculture, the production influencing factors, and resources optimization. Furthermore, this research also leads to asseses the contribution of aquaculture sector and the economic impact to Tangerang Regency and to society. The methods used in this research are Cobb-Douglas production function, Optimization analysis, Location Quotient Analysis, and Multiplier analysis. The factors which significantly influence the milkfish aquaculture production are fishmeal, milkfish fingerling, labor of maintenance, and area of the fishpond. Based on Cobb-Douglas production function, the optimal usage production rate per hectare per cropping season in the milkfish aquaculture in Tanjung Pasir Village consists of 519,699 kilograms milkfish fingerlings; 1157,632 kilograms fishmeals; 234,801 kilograms fertilizers; 93,491 HOK labor of maintenance; and 3,3 hectare. The estimated profit at the optimal level is about Rp. 19.516.800 per hectare per cropping season. Milkfish aquaculture area in Tanjung Pasir has contributed to the economy of Tangerang Regency and economic impact to local communities. Moreover, its contribution considerable because the Location Quotient value is greater than 1 and Keynesian Income Multiplier value is 0,06.
Keyword: Milkfish Ponds, Tanjung Pasir Village, Multiplier effect, Location Quotient, Optimization

Judul: Kelayakan Usaha Pancing Rawai di Pangkalan Pendaratan Ikan Tanjung Pasir Kabupaten Tangerang
Abstrak: The development of small scale fisheries in Indonesia is not quite grow because of difficult to getting loan. PPI Tanjung Pasir is dominated by small scale long line fisheries. The objective of this research are to describe the fishing unit, productivity and financial feasibility. This research used descriptive method. The result showed that long liner was 3-4 GT wood boat, with lenght: 7.5-10 m, width: 2-3 m, and draft 1-2 m. There were 3 fishermen in one fishing unit. The lenght of long line is 3 000-4 000 m, aproximately the number of hook were 600-1 000. Composition of long line catches were dominated by white snapper (Lates carcarifer). Productivity per trip was 28.09 kg/trip/year, boat productivity was 1.899 ton/GT/year, gear productivity (hook rate) was 0.05 fish/trip/boat, and fisherman productivity was 9.36 kg/man/trip. Based on investment analysis, R/C ratio was 1.11, payback period was 2.36 year, ROI was 42%, NPV Rp30 253 594, IRR 51.30% and Net B/C ratio was 2.01. Refers to productivity and financial analysis, Tanjung Pasir long line business is feasible to be continued and expanded.
Keyword: Bogor Agricultural University (IPB), Tanjung Pasir, productivity, long line, feasibility business

Judul: Perbandingan Algoritma Message Digest 5 (MD5) Dan Secure Hash Algorithm 1 (Shai) Untuk Autentikasi Pesan
Abstrak: Seiring dcngan meningkatnya penggunaan internet sebagai media pertukaran pcsan. metodc pcngamanan pcsan menjadi sangat penting. Nilai suatu pesan yang ingin dijaga keutuhan atnu intcgritasnya menycbabkan pesan tcrscbut hanya baleh dimodifikasi olch pihak yang bcrhak. Namun pada rcalitanya, pesan tersebut akan mendapat ancaman dari scorang penyusup. Bentuk ancaman terjadi apabiJa pcnyusup dcngan suatu cara. dapat mengubah isi pesan terscbut untuk bcrbagai kepcntingan. Apabila isi pesan telah bcrubah dad bentuk aslinya, maka pesan terscbut dikatakan sudah tidak aulcnlik (asli) Iagi. Snatn metodc yang efektif untuk mcnguji kcautentikan suatll pesan digllnakan tcknik kriptografi. Pada kal)'a ilmiah ini akan dibahas algoritma Message Digest 5 (MDS) dan Secure !-lash Algorithm (SHAI) untuk autentikasi pesan.
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