Judul: Welfare refinement model for fishermen through improvement of fishery business sector at the regency of rokan hilir, Riau Province.
Abstrak: Fishery sector has not significantly given a denotable economic contribution in improving fishermen’s welfare, as shown by fishermen’s poverty headcount index (PHI) of 0.32 which falls in “poor” category. This research was carried out to develop a welfare improvement model for fishermen based on both internal and external factors affecting the fishery sector in Regency of Rokan Hilir. The study was conducted by applying Structural Equation Model (SEM) method which considers some external and internal factors in fishery business, activities in fishery industry, capture fishery activities, aquaculture activities, fish processing activities, central government, regional government, and fishermen welfare factors. The research was conducted in four coastal sub-districts in the Regency of Rokan Hilir, Riau Province and data collection was carried out in an eight-month period, from July 2008 to February 2009. Two additional analysis were simultaneously carried out for this research, i.e. fishermen welfare analysis using welfare indicators established by the Indonesian Bureau of Statistic, financial performance analysis of fishery business that calculated conventional indicators, such as net present value (NPV), net benefit-cost ratio (NB/C), internal rate of return (IRR), return on investment (RoI), and payback period (PP). SEM analysis concluded that in overall the studied factors significantly affected fishermen welfare improvement in the area. Both capture and aquaculture activities significantly promote fishermen’s welfare as they involved more labors from local work forces. The national and local fisheries authorities indirectly affected the fishery industry through their regulation while the local authorities significantly promoted the expansion on some fisheries activities and fishermen’s welfare. The fishery businesses with payang, bubu, serok, jaring insang hanyut and handline are worth developing as indicated by satisfactory financial indicators, i.e. values of both NPV and NB/C > 0, IRR was greater than 8.65% (the interest rate of the time of data collection) and the ROI and PP were considerably shorter or faster. On the other hand, the fishery businesses with jaring insang lingkar, pukat udang and pukat pantai are not worth due to unsatisfactory performance, i.e. both NPV and NB/C < 0, and IRR was considerably lower than 8.65%) and the ROI and PP were longer or slower.
Keyword: Financial Performance Analysis, Rokan Hilir, Fishermen’s Welfare, Structural Equation Modeling, Riau

Judul: The model of capture fisheries management in the area of Bali Strait
Abstrak: The fisheries activity was being prime mover (around 80%) of the fishermen and the society economic in the area of Bali Strait. However, it would be very much trivial if the potency was not well managed and unable to give the prosperity for the fishermen society. The research purposes were to determine the level of fishermen prosperity, to forecast the production of major catch of fishes, to determine the level of fisheries business feasibility, to formulate the management of the capacity building for strategy of fisheries resources, and to build the management model of the area that guarantees the sustainability of fisheries development. The method used consisted of the level of prosperity analysis, forecasting analysis, business feasibility analysis, strategy analysis by using AHP, and model analysis by using SEM. The results of analysis showed that the level of fishermen prosperity in the area of Bali Strait was ‘moderate’ (total score=25.80). The production of lemuru tended to increase within the last several years and at the year of 2010 was forecasted to decrease 44,899.13 tonnes. The production of tongkol tended to decrease, and at the year of 2010 was forecasted to reach 2,035.30 tonnes. The production of layang also tended to decrease, and at the year of 2010 was forecasted to reach 1,967.01 tonnes. As the dominant fisheries business, purse seine one boat system (OBS), purse seine two boat system (TBS), gill net and ‘payang’ were very feasible to be developed in the area indicatively the values, NPV>1, IRR>6.25, ROI>1, and B/C Ratio>1. The development managed by the spesific institution establised by local governments (RK=0.284) was the right strategy of capacity building in order to manage the fisheries resources in the area. This specific institution roled to organize the fisheries resources conservation programs, to regulate the exploitation of fisheries resources based on local governments policy (SKB), to supervise selling price and fishing gears operation periodically, to provide the information centre of job opportunity and the vocational centre, and to facilitate the local revenue planning of the sector of fisheries. The management model of the area developed could fit some criteria such as goodness of fit (Chi-square, signifance probability, RMSEA, GFI, AGFI, CMIN/DF, TLI, dan CFII). The results of analysis of the model showed that some concerned components for sustainability guarantee of fisheries development in the area required were local market performance, export market performance, product supply of processing industry to the market, biodiversity, prosperity of fishermen, work force absorption of capture fisheries business and industry, growth of capture fisheries business, income of processing industry and tax.
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Judul: Penyelesaian Masalah Pelabelan Graf vertex Magic pada Graf Cycle Sederhana
Abstrak: Graf vertex magic adalah suatu graf memiliki nilai bilangan magic yang sama pada masing-masing vertex yang berbeda. Graf cycle sederhana adalah suatu walk tertutup yang mengandung setidaknya tiga vertex, semua vertex-nya berbeda dan setiap vertex terhubungkan oleh satu edge.
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