Judul: Utilization of Marine Biota in the Bedul Block Mangrove Forest, Alas Purwo National Park, East Java Province
Abstrak: Ekosistem mangrove memiliki keterkaitan dengan biota laut khususnya perairan payau. Ekosistem mangrove berfungsi sebagai daerah pengasuhan (nursery ground), tempat pemijahan (spawning ground), dan daerah mencari makan (feeding ground). Penelitian ini bertujuan untuk mengidentifikasi kondisi lingkungan perairan mangrove Desa Sumberasri, mengidentifikasi biota laut yang dimanfaatkan oleh masyarakat sekitar kawasan diperairan Taman Nasional Alas Purwo (TNAP), mengidentifikasi pola pemanfaatan biota laut di perairan TNAP oleh masyarakat sekitar kawasan. Metode penelitian yang digunakan ialah studi pustaka, observasi lapang, dan wawancara dengan menggunakan analisis SWOT, dan analisis deskriptif kualitatif. Hasil penelitian menunjukkan diPerairan Blok Bedul terdapat 13 jenis pisces, 6 jenis crustace, dan 3 jenis molusca. Masyarakat nelayan Desa Sumberasri memanfaatkan hasil tangkapan biota mangrove dilakukan dengan cara dijual ke pengepul. Pengolahan jenis biota diluar perikanan tangkap belum ada. Hasil tangkapan yang biasanya langsung dijual ke pengepul atau konsumen, sebaiknya dilakukan pengolahan terlebih dahulu agar nilai jual semakin tinggi., The mangrove ecosystem is related to marine life, especially brackish waters. The mangrove ecosystem functions as a nursery ground, a spawning ground, and a feeding ground. This study aims to identify the environmental conditions of the mangrove waters of Sumberasri Village, identify marine biota that is used by the community around the area in the waters of Alas Purwo National Park (TNAP), identify patterns of utilization of marine biota in TNAP waters by the community around the area. The research method used is literature study, field observation, and interviews using SWOT analysis and qualitative descriptive analysis. The results showed that in Bedul Block waters there were 13 types of pisces, 6 types of crustace and 3 types of molluscs. The fishing community of Sumberasri Village uses the catch of mangrove biota by selling it to collectors. Processing of biota types outside of capture fisheries does not yet exist. The catch, which is usually sold directly to collectors or consumers, should be processed first so that the selling value is higher.
Keyword: Fishermen, Marine biota, TNAP

Judul: Pemanfaatan Hasil Hutan Bukan Kayu di Hutan Mangrove Blok Bedul, Taman Nasional Alas Purwo, Provinsi Jawa Timur
Abstrak: Alas Purwo National Park (TNAP) is a conservation area that has a diversity of animals and natural habitats with various types of communities and has important values contained therein. This research was conducted at TNAP. The purpose of this study was to identify and analyze the types and utilization of Non-Timber Forest Product (NTFP), analyze the dynamics of NTFP utilization in the mangrove forest in the Bedul Block, and to identify and analyze the efficiency level of the trading channel through the trade channel, trade function, trade margin, profit ratio, and farmer's share. The research method used is literature study, field observations, and interviews using quantitative descriptive analysis to analyze trading efficiency by looking at trading margin, profit ratio, and farmer's share; qualitative descriptive analysis to identify the types and uses of NTFP, trade channels, trade functions, and the dynamics of NTFP management. The results showed that the types of NTFP used were teak grasshoppers, forest honey and mangrove honey. The use of NTFP in Bedul mangroves had occurred before the TNAP area was determined by utilizing secondary crops. Efforts made by TNAP managers are related to the use of NTFP such as community empowerment, special use of honey, and zoning changes. The most efficient trading system is located in channel first. This is caused by short channels, namely direct selling to consumers, high profit ratios, and high farmer's share.
Keyword: NTFP, TNAP, trade system

Judul: Construction of Strongly Optimal Binary Linear Code with Minimum Distance 9 and 11
Abstrak: A binary linear code of length n over q F is a subspace of n q F . A code has three parameters that attached to it, namely length, dimension, and minimum distance. A code with length n, dimension k and minimum distance d is often called [n, k, d ]-code. Usually, when two parameters are given, then we want to find a code that has the best value for the last parameter. Based on Gilbert- Varshamov bound, if a [n, k, d ]-code exists and can not be expanded, we call it a strongly optimal code. In this paper, we construct strongly optimal code with minimum distance 9 and 11. In constructing the code, we created a theorem and algorithm based on Gilbert-Varshamov bound before we implement the algorithm to MAPLE programming language. Because of computational limitations, the program can only construct up to k = 10 for d = 9 and k = 12 for d = 11.
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