Judul: Study on Assessment of Mangrove and Coral Reefs Ecosystem Management in Sangiang Island, Banten.
Abstrak: Pulau Sangiang terletak di Selat Sunda berjarak sekitar 7 mil laut dari Kecamatan Anyar, salah satu daerah tujuan wisata yang populer di Banten. Status pulau ini adalah Taman Wisata Alam (TWA) dibawah pengelolaan Departemen Kehutanan. Walaupun terletak tidak jauh dari daerah tujuan wisata utama di Hanten, @ tapi fasilitas wisata di pulau ini seperti penginapan, penyeberangan dan sarana i>enunjang lain tidak tersedia menyebabkan rendanya kunjungan wisatawan lIlI1usantara maupun mancanegara ke pulau ini. ~ Mengingat status dari Pulau Sangiang sebagai TWA, maka pulau ini memiliki -g:ungsi perlindungan sebagai penyangga kehidupan, pengawetan keanekaragaman ~ayati serta pemanfaatan secara lestari sumberdaya alam dan ekosistemnya. ~amun demikian banyak kegiatan seperti percobaan pembukaan tambak ikan/udang ~an pembangunan resort wisata yang mengubah kualitas ekosistem mangrove dan ~erumbu karang. Penelitian ini bertujuan untuk memperkirakan nilai ekonomi dari ~kosistem mangrove dan terumbu karang yang ada di Pulau Sangiang sebagai ~asukan bagi Pemerintah Kabupaten Serang, Propinsi Banten dan Departemen Si<ehutanan dalam pengambilan keputusan pengelolaan untuk menjamin kelestarian %ari ekosistem terse but. ~ Dari hasil penelitian ini, diperoleh nilai ekonomi total (NET) dari ekosistem Snangrove dan terumbu karang di Pulau Sangiang adalah sebesar Rp ~ 407 446 699.10 yang terdiri dari nilai ekosistem mangrove sebesar Rp :J3 140 471 779.97 dan terumbu karang sebesar Rp 4 266 974 919.13. Selanjutnya ~elakukan kajian analisis biaya manfaat, dengan menerapkan 3 (tiga) skenario 'gpengelolaan, yaitu (1) skenario konservasi, (2) skenario ekowisata dan (3) skenario .::!budidaya perikanan. Dari kajian analisis biaya manfaat terungkap bahwa untuk ekosistem mangrove, skenario ekowisata memiliki nilai perbandingan biaya manfaat (benefit cost ratio=BCR) paling tinggi sebesar 7.31 dengan nilai bersih sekarang (net present value=NPV) sebesar Rp 24 105755 378.56. Untuk ekosistem terumbu karang, skenario konservasi memberikan nilai BCR paling tinggi sebesar 12.73 dengan NPV sebesar Rp 29 659 098 664.66. Skenario pengembangan optimal Pulau Sangiang yang direkomendasikan dari penelitian ini adalah ekowisata untuk ekosistem mangrove dan konservasi untuk ekosistem terumbu karang.
Keyword: 

Judul: Kajian Ekopnomi dan Ekologi Pemanfaatan Ekosistem  Mangrove Pesisir Tongke-Tongke Kabupaten Sinjai Provinsi Sulawesi Selatan
Abstrak: The ecosystem of mangrove forest at the coastal area of Tongke-Tongke, Sinjai Regency, South Sulawesi Provence, which is the result of the community’s self effort, is feared to face degradation as a result of the demand of local community for livehold, there for this research was intended to a) determine the economic value of the mangrove ecosystem at Tongke-tongke, b) analyze the suitability of the mangrove area particularly for fish pond, and c) determine the socio-economic condition of the local community. Te area suitability for fish pond was determined on the basis of the water quality, soil quality and areasupporting resources by analysis of Geografic Information System (GIS) and factorial discriminant analysis. The data of socio-economy was obtained by interviews of quistionnaires with 84 respondents. To examine the effect of socioeconomic factors, a multivariate analysis of the principal component (PCA) and linear multiple regression analysis were employed. The result of the research showed that the area was highly suitable for fish and shrimp ponds, and scenario 1 (natural condition of mangrove) was the most profitable alternative management. Result of economic benefit analysis on mangrove determine that the highest proportion for total economic value of mangrove ecosystem was indirect benefit with value Rp. 4.434.816.711,00/year or 96,67 %, furthermore the existence benefit was Rp.101.478.371,00/year or 2,21 % and the indirect benefit was Rp.46.643.904,00/year or 1,02 %, while choice benefit value was Rp.4.434.450,00 /year or only 0,10 % from total benefit value. Individuals with a big number of family numbers tended to have a big number of workers, high income and expenses, too. The family income is affected by the number of family number, independent ratio, and type of jobs; where expense is influenced by the umber of family member and independent ratio.
Keyword: 

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.
Keyword: