Judul: Exploring a Business Model for a Sustainable Stingray leather Industry in Rembang
Abstrak: Rembang is rich in marine fishing resources. As the largest marine fishing producers, Rembang has the potential to develop the stingray leather industry. This research attempts to explore a business model that can support the stingray leather industry and its sustainability. Developing a suitable business model is needed for the emerging Rembang stingray leather industry in order to support its sustainability by creating, delivering and adding value. The research looks to answer following questions: (1) What is the nature of the stingray leather industry in Rembang? (2) What is the current business model applied to the Rembang stingray leather industry? (3) What are the barriers in applying this business model? (4) What kind of business model can support the sustainability of the Rembang stingray leather industry? The research used frameworks of SWOT analysis, Porter’s five forces analysis and Business Model Canvas analysis to explore the stingray leather industry and the business within it. The research was conducted in Rembang. The research design is an exploratory study with qualitative approach. The research used a purposive sampling with a snowball sampling techniques to invite respondents. The techniques led to five respondents who have knowledge and experiences in the Rembang stingray leather Industry. The respondents are stingray leather entrepreneur, government officials, researcher and stingray skins supplier. The data collection consists of literature/document review, observation and interview. Interviews were conducted in a semi-structured format using an interview protocols with an open-ended questions. The stingray leather industry depends on several parties, such as governments, stingray skins providers and stingray leather goods manufacturers. The strengths of stingray leather industry in Rembang lies on its location, resources and the human resources capability. The weaknesses include lack of supporting industries, lack of human resources availability and weak business infrastructure. The industry does not free from threats that come from outside the region, such unfair trade in the Yogyakarta market and the penetration of big stingray leather ventures to obtain stingray skins in Rembang. However, Rembang has its customers segment that gradually improved, and the local government provides full support for the entrepreneurs to develop the industry. It is essential to develop the competitiveness of the industry with several advantages. The collaboration among stakeholders in Rembang stingray leather industry could strengthen the industry and encourage new entrepreneurs in the region to do the business. A successful entrepreneur needs a business model to reach the financial viability of the venture. Moreover, a business should consider social and environmental aspect to achieve its sustainability. A business model for the stingray leather business in Rembang should focus on partnerships. The partnerships will create better value propositions for customers and surroundings. In addition, an innovative stingray leather business model will develop the stingray leather industry in Rembang.
Keyword: Business model, Rembang Regency, stingray leather industry, sustainability

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: Approximation of the Median of Poisson Distribution Using the Relation of Poisson-Gamma Distribution
Abstrak: A major drawback of median is that median cannot usually be defined in closed form, even in the cases where their distribution functions are known. This study gives an approximation of the closed form for the median of the Poisson distribution by using the relation of Poisson-Gamma distribution. The approximation uses elementary techniques based on the monotonicity of certain sequences involving tail probabilities of the Poisson distribution and the Central Limit Theorem. Furthermore, a closed form expression for the mean absolute deviation 􀜧|􀜰􀰒 􀵆 􀜯􀝁􀝀􁈺􀜰􀰒􁈻| is also studied. The median is relevant because of the fact that it minimizes the mean absolute deviation of a Poisson random variable (􀜰􀰒􁈻 by considering median as central tendency.
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