Judul: Model of integrated management sustainable at youtefa bay
Abstrak: The Youtefa Bay is one of the important resources. The water in this place is used for fishery, transportation, and ecotourisme. Youtefa Bay is located at the west of Jayapura city. Youtefa Bay is surrounded by settlement where most of resident are fisherman and farmers. The aim of this research is to develop a model of Youtefa Bay. The research was conducted in five steps, i.e. (1) to determine the existing condition of physical and chemical parameters, (2) to determine the level pollution, load pollution, and assimilative capacity, (3) to determine of water pollution control strategy, (4) to develop model of management institution, (5) to develop model management Youtefa Bay a similar prominent purpose. The research was carried out based on field survey, in situ and laboratory sample examination, questionnaire, and expert judgement. The STORET method and pollution index were used to determine the water quality status and level of water pollution. The pollution loading was determined by rapid assessment. Youtefa Bay institution determine Interpretative Structural Modelling (ISM). Pollution control by means of descriptive. Management model develop in this study was built into three sub-models, namely (1) pollution source sub-model, (2) The loading pollution sub-model, and (3) water quality sub-model using program powersim studio expert 2005 version. The results of water pollution parameters such as total suspended solid (TSS), dissolved oxygen (DO), Nitrate (NO3), fosfate (PO4), were higher than the allowableness water sea for sea biota standard. Acording to water quality status, the Youtefa Bay is categorized as of light, medium, and heavy. Assimilation capacities are BOD 27 ton/month, TSS 2354 ton/month, NH3 54 ton/month, COD 286 ton/month, NO3 9087 ton/month, and PO4 12 ton/month. The Youtefa Bay water pollution control, i.e (1) institution approach, (2) law approach implementation, (3) social approximation, (4) approximation economy, (5) space arrangement approximation. The key element management Youtefa Bay is the policy commitment approximation, and relations strengthen inter stakeholder, realization plan approximation, and strategy plan priority. There are three development scenario, that are including optimistic scenario. The optimistic scenario are the realistic scenario that occur in the future for management Youtefa Bay in considering of ecology, social, and economy aspects. The conclusion is the Youtefa Bay polluted light, medium, and heavy, and it’s very important to analiyze the pollution level of the Youtefa Bay periodically in terms of it’s sustainability.
Keyword: Youtefa Bay, Water pollution level, pollution load, assimilation, rapid assessment capacity, pollution control, Interpretative Structural Modeling

Judul: Model of management of capture fisheries area in Banten Bay
Abstrak: Banten Bay is area which quite rapid development for many activities. Industrial waste disposal, domestic, over fishing, coral exploitation, reclamation, vessel traffic, and environmental damage, cause interest multi sector conflict in managing sea area. General objective of the research is to create model of management of sustainable capture fisheries area in Banten Bay. The specific objectives are to (1) determine utilization status and development prospect of capture fisheries; (2) determine leading commodity; (3) determine environmentally friendly fishing gears, (4) establish utilization zone; (5) arrange policy strategy in managing capture fisheries; and (6) simulate of model of management of capture fisheries. Evaluating utilization status and development prospect of capture fisheries was conducted using surplus production method with bionomic model. Determination of leading commodity was conducted with LQ value, IS, and descriptive method. Environmental and sustainable fishing gear was analyzed using CCRF criteria with scoring method approach. Zoning of capture fisheries area utilization was conducted by GIS. Management strategy of capture fisheries area was conducted with SWOT and AHP. Simulate of model of management of capture fisheries was conducted with LGP and model simulation of sustainable fish resources and salary fisherman. The result showed that utilization status and development prospect of capture fisheries in Banten Bay can still be developed for 9 species from 23 species. Squid, anchovy, and crab were commodities with high comparative advantages. Hand line, boat lift net, and gillnet were environmentally fishing gears. Zoning of Banten Bay utilization are consist of aquaculture, recreation, conservation, capture fisheries, fishing port, and industrial zone. Zone of capture fisheries was composed base on fishing ground eligibility indicator, suitability of fishing gear with fishing ground, minimum of conflict potency, availability of infrastructure, and environmental carrying capacity. Capture fisheries zone is divided into three zones, that are (i) passive zone, (ii) passive and outboard fishing boat zone, (iii) active and inboard fishing boat zone. Based on LGP analysis, maximum catch was 1.747,259 ton/year, alocation for fishing gear of gillnet, danish seine net, set lift net, boat lift net, boat seine, hand line, guiding barrier trap, and monofilament gillnet were 3, 11, 11, 6, 2, 5, 0 and 0 unit, respectively. The proposed strategy in managing Banten Bay area were (1) utilization strategic location of Banten Bay with optimalization leading commodity for providing fish demand; (2) taking advantage of high availability of human resources and fisherman concern to manage capture fisheries area; (3) utilization local government support and regional autonomy to make policy in structuring and expansion of fishing area and involving coastal communities in the management. Model of management of capture fisheries area in Banten Bay can be increase of salary fisherman as much as 25% from first scenario and take care of sustainable fish resources the periode of time 18 years.
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Judul: Konstruksi aritmetika kurva eliptik F(2m) supersingular dan non-supersingular untuk skema kunci publik ElGamal
Abstrak: Algoritme ElGamal adalah salah satu algoritme kunci publik dengan aritmetik modular p yang mempunyai struktur grip siklik Z(p). Tingkat keanaman algoritme ini terletak pada pemecahan masalah logaritme diskret dari Z(p). Akan tetapi, tingkat keamanan tadi tahun ke tahun semakin menurun yang disebabkan kemampuan pemecahan algoritme diskret semakin meningkat. Untuk memenuhi tingkat keamanan yang memadai dibutuhkan p yang cukup besar yang menyebabkan proses enkripsi dan dekripsi menjadi lambat.
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