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: Strategi Bersaing Industri Kulit Di Sentra Industri Kulit Manding
Abstrak: Since 1979, Manding is the center of the leather industries which is wellknown by the people of Yogyakarta. Currently, Manding leather industries have decreased the competitiveness. This is characterized by the reduction number of export, the amount of production and the amount of annual sales. The purposes of this study were: (1) to formulate a strategy to raise the competitiveness. (2) to determine the priority strategies in enhancing the competitiveness of the leather industries in Manding. The tools used to analyze the data were the IFE matrix, EFE matrix that assisted by Porter’s Five Forces Model analysis, IE matrix, SWOT matrix, and QSPM matrix. The internal environment factors which influenced the company‟s strength consist of satisfied quality product; the big name of Manding; and the availability of raw materials. Meanwhile, the weaknesses of the industry were caused by the limitation of business network; low education of the workers; and problems of showroom. The external factor that increasing the opportunies in the industry was the impression of manding leather products are exotic, elegant and exclusive. From the quesioner we found that one of the popular product is stingray leather products In addition, the government also supported this by Ministry of Industry, ATK, and BBPPK. On the other hand, the external factors that threaten the industry were the existence of similar leather industries in vary scales; increase in fuel; and competition with substitute products. Prioritized strategies in enhancing the competitiveness of the leather industry Manding based on QSPM matrix in this study were: (1) an Internet-based marketing, the applications could be website making, join in the tradingforum, as well as the use of social media as a promotional tool and online transactions. (2) Provide the product knowledge and product trademarks. These mean for promotion, capture loyal customers, and expand the network marketing cooperation. (3) Optimize the function of the Manding craftsmen community. The craftsmen association namely Setyo Rukun expected to motivate and coordinate the craftsmen being active following the exhibition and to improve the ability to innovate products and administrative guidance for SMEs (Small and Medium Entities). As a results, these strategies are considered to cope the main issues in marketing and financial capital. Thus, by solving these expected to be able to improve the competitiveness in Manding leather industry center.
Keyword: 

Judul: Orbit elektron dan probabilitas level energi sistem chaotic atom hidrogen
Abstrak: a. Mendapatkan orbit elektron sistem chaotic atom hidrogen (dalam koordinat semiparabolik). b. Mendapatkan probabilitas dua level energi yang berdekatan dari sistem chaotic atom hidrogen.
Keyword: Atom, Orbit Elektron