Judul: Analisis Strategi Rantai Pasokan Udang Vaname (Studi Kasus Petani Plasma Tambak Pandu Karawang, Kabupaten Karawang, Jawa Barat)
Abstrak: One of the agri-fishery commodities in Indonesia, which is currently highly profitable and is a commodity shrimp. The development of shrimp consumption on the international level and national level is considered by many farmers and fishermen market potential. This is then used as an excuse to encourage improvement and development efforts on commodity shrimp. One of the business actors in the field of fisheries, especially for agribusiness commodities vaname shrimp is shrimp supply chain members vaname. Members vaname shrimp supply chain consists of four principal business consists of vaname shrimp producers, smallholders shrimp pond Pandu vaname Karawang, distributors, supermarkets and Makro. Vaname shrimp supply chain has a few problems in activities that affect the ability to generate profits. The problem is not yet well-organized supply chain between both functions in the supply chain members, starting from the seed producer to the consumer end of the causes of this supply chain is not going so well that affect each of the chain actors. Supply chain or supply chain is a distributed system where the organization of production of goods and services to its customers. This chain is also a network of various organizations are interconnected and have the same goal, ie holding the best possible procurement or distribution of goods. The purpose of this study is to identify the shrimp supply chain in the pond ECE vaname Karawang, formulate alternative strategies to improve supply chain performance of long-term vaname shrimp, formulate alternative strategies based on the best strategy was chosen for vaname shrimp supply chain. Research methods used in this research is descriptive analysis using the framework of supply chain management analysis that has been modified by Vorst. after a descriptive analysis of the shrimp supply chain vaname the next step is to make the strategy formulation stage. formulation of the strategy formulation process consists daritahap input (input), phase matching, and decision stage.Analysis of strategy formulation used in this study is the analysis of internal and external environment (IFE and EFE), SWOT analysis and the analysis QSPM.
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Judul: Income Analysis and Development Strategy of Vaname Shrimp Aquaculture (Case Study: Patutrejo Village, Purworejo Regency)
Abstrak: Desa Patutrejo merupakan salah satu desa di Kabupaten Purworejo yang berbatasan langsung dengan Samudra Hindia di bagian selatan sehingga mendukung kegiatan budidaya perikanan salah satunya adalah budidaya tambak udang vaname. Namun pada empat tahun terakhir, petambak mulai menghadapi kendala tingginya intensitas kegagalan panen akibat penyakit yang menyerang udang yang menyebabkan penerimaan menurun sehingga banyak petambak memilih untuk berhenti melakukan budidaya. Berdasarkan hal tersebut tujuan dari penelitian ini yaitu (1) menganalisis pendapatan budidaya udang vaname, (2) menganalisis faktor-faktor yang memengaruhi keputusan petambak untuk melanjutkan budidaya, (3) menyusun strategi pengembangan budidaya. Hasil pada analisis pendapatan didapatkan bahwa R/C rasio bernilai lebih dari satu sehingga budidaya udang vaname di Desa Patutrejo masih menguntungkan. Pada analisis faktor-faktor yang yang memengaruhi keputusan berbudidaya menggunakan analisis regresi logistik biner, faktor yang mempengaruhi adalah luas lahan dan pendapatan petambak. Pada penyusunan strategi pengembangan budidaya menggunakan Analytical Hierarchy Process (AHP), kriteria yang harus dipenuhi terlebih dahulu adalah manajemen penyakit udang. Salah satu alternatif kegiatan yang dapat dilakukan adalah pengadaan pelatihan cara berbudidaya ikan yang baik kepada petambak serta penyebaran informasi mengenai penanganan penyakit udang agar menekan angka gagal panen., Patutrejo Village is one of the villages in Purworejo Regency which is directly located on the southern edge of the Indian Ocean, which supports aquaculture activities, one of which is vaname shrimp aquaculture. However, in the last four years, farmers began to face the constraints of the high intensity of crop losses due to diseases that attack shrimp causing revenue to decline so many farmers choose to stop cultivating. Based on this, the objectives of this study are (1) to analyze the income of vaname shrimp aquaculture, (2) to analyze the factors that influence the decision of farmers to continue cultivation, (3) to develop a strategy for aquaculture development. The results of the income analysis found that the R/C ratio is more than one so vaname shrimp aquaculture in Patutrejo Village is still profitable. The influential factors influencing farming decisions using binary logistic regression analysis are land area and farmer income. In preparing aquaculture development strategies using the Analytical Hierarchy Process (AHP), the criteria that must be met first is shrimp disease management. One of the alternative activities that can be carried out is through the provision of training on how to cultivate good fish for farmers and the dissemination of information on shrimp disease management to reduce the number of crop losses.
Keyword: Analytic Hierarchy Process, R/C rasio, faktor keputusan budidaya, manajemen penyakit

Judul: Penggunaan Teorema Homeomorphy 2-Manifold dan Teorema Euler Poincare pada Torus 𝑇�� dan Simplicial Complex 𝐾��
Abstrak: Two dimensional topological spaces are said to be homeomorphic if they have the same topological invariant, where one of topological invariant used is an Euler characteristic. Homeomorphy 2-Manifold’s Theorem and Euler Poincare’s Theorem are used to distinguish two topological spaces. Homeomorphy 2-Manifold’s Theorem uses Euler characteristic to identify two dimensional topological spaces. Euler Poincare’s Theorem is an alternative way to find Euler characteristic with Betti number, which is topological invariant as well. The objective of this paper is to investigate the homeomorphism of torus 𝑇����� and simplicial complex 𝐾�����. Topological space torus and simplicial complex 𝐾����� have the same Euler characteristic, which is two. Based on Homeomorphy 2-Manifold’s Theorem topological space torus 𝑇����� and simplicial complex 𝐾����� is homeomorphic.
Keyword: simplicial, torus, Euler, homeomorphism, topology