Judul: Economic Policy For Sustainable Large Pelagic Fisheries Management In East Flores Regency
Abstrak: Tuna and skipjack are categorized as large pelagic fish resource which has a high economic value and exploited for food, nutrition and export. The exploitation of those fishes in East Flores Regency is increasing in the last ten years, and raised the question of sustainable fisheries management. Based on these condition, the research aims to evaluate fisheries resource management, too analyzed economic surplus, to evaluate fisheries sustainable and economic policy analysis for sustainable management of the large pelagic fisheries. Survey method was used in this research and data analysis using bioeconomic, economic surplus, multi dimensional scaling and analysis hierarchy process. Based on analyses, tuna and skipjack resource exploitation is still under maximum economic yield (MEY) level. According to the calculation of the average degradation and depreciation of tuna are 0.350 and 0.351, and skipjack 0.354 and 0.275, since of the value are 0 less than 0.5 indicate that the tuna and skipjack have not degraded and depreciated. The best large pelagic fisheries (tuna and skipjack) management is carried out under level of MEYof tuna which production rate 6,072 tons per year and the effort, as many as 42,904 trips per year, with economic rent of Rp 88.9 billions per year. The economic surplus of producer is Rp 1.5 million per ton and consumer surplus is Rp 46 million per ton. MEY level of skipjack for production rate is 4,652 tons per year, and the effort 20,256 trips per year, with economic rent Rp 38.9 billion per year. The economic surplus of producer is Rp 0.31 million per ton and consumer surplus is Rp 0.58 million per ton. Sustainability analysis showed that three of five dimensions which are ecology, technology and institutional are good condition, but two dimension which are social and economy has to be improved. Policy toward sustainable large pelagic fisheries management should consider environmental friendly technology is the first priority, follows by monitoring and evaluation, price, labor, conflict management and marketing policies.
Keyword: Bioeconomic, Economic Surplus, Resource Policy, Sustainable Fisheries Management, Tuna and Skipjack, East Flores Regency

Judul: Sustainability of skipjack katsuwonus pelamis fisheries in Indonesian Exclusive Economic Zone (IEEZ) of Indian Ocean at Southern Coast of East Java
Abstrak: Indonesian exclusive economic zone of Indian Ocean at southern coast of East Java includes in WPP-RI 573 which has potential biological resources to be utilized for economic development. Specific oceanographic condition has caused the regions relatively more fertile than other regions. An abundance fishery resources in the region is skipjack which has a sufficiently high economic value. Utilization rate of the species is assumed of being moderate thus enabling further increasing in its utilization. One type of fleet used to exploit skipjack resources in WPPRI 573 is sekoci boat based in PPP Pondokdadap, Malang Regency. The fleet number has showed a significant increase during 2001-2010. Size of the vessel includes in medium category and still uses traditional fishing gears (hand-line). Sekoci boat has been reliably used to catch fish at a distance of 50-200 miles, with catching period 8 to 12 months every year in areas fitted with a fish aggregating device. Research objectives were to analyze the conditions of oceanographic factors, skipjack stock biomass, linkages between oceanographic aspects and stock biomass, fisheries sustainability status on ecological, economic, technological, social and institutional dimensions, as well as management strategy of the fisheries through priorities setting based on multidimensional sustainability status. Research results showed that wind monsoon affected vertical and horizontal distribution of sea surface temperature (SST) and chlorophyll-a concentration. Distribution of those parameters during eastern monsoon favored the abundance of skipjack population compared to that in western monsoon. CPUE fluctuations trailed monsoon patterns, with higher values in the eastern monsoon than in the western monsoon. Fishing season peak occurred in July to October annually. During the eastern monsoon SST decreased while concentration of chlorophyll-a and CPUE values tended to increase. Contrary, during the western monsoon SST increased and chlorophyll-a concentration as well as and CPUE tended to decrease. Furthermore, sustainability index for each dimension indicated that ecological dimension included in sustainable category, followed by technological dimension in moderate category. Sustainability index of institutional, economic, and social dimensions included in less sustainable category with the lowest index on social dimension. Multidimensional index indicated that overall status of skipjack sustainability in IEEZ at southern coast of East Java was moderate which required arrangement of various sensitive attributes. Smart analysis result showed policy priorities for social dimension followed by institutional and economic dimensions. The highest score attributes of the dimensions were consecutively business ownership, enforcement of rules, and environmental awareness. Application of policy priorities would result in increases in sustainability index with higher values after application of the policy.
Keyword: Katsuwonus pelamis, Fisheries, East Java, Oceanographic aspects, Biomass stock, Sustainability status, Skipjack

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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