Judul: Partisipasi Masyarakat Nelayan dalam Pemanfaatan Kawasan Mangrove untuk Perikanan Tangkap di Halmahera Utara
Abstrak: Wilayah pesisir merupakan suatu daerah peralihan antara ekosistem daratan dan lautan yang memiliki produktivitas hayati tinggi. Adanya pasokan unsur hara dari daratan melalui aliran air sungai dan aliran air permukaan ketika hujan, serta tumbuh dan berkembangnya berbagai ekosistem alami seperti hutan mangrove, terumbu karang, padang lamun dan estuaria, menyebabkan wilayah pesisir sangat subur. Dengan potensi tersebut dan aksesibilitas yang mudah, wilayah pesisir dimanfaatkan untuk berbagai tujuan. Hutan mangrove merupakan salah satu ekosistem pesisir yang unik dan terdapat hampir di seluruh pantai pulau-pulau di Indonesia. Ekosistem ini mempunyai sifat dan bentuk yang khas serta mempunyai fungsi dan manfaat yang beraneka ragam bagi manusia serta makhluk hidup lainnya. Oleh karenanya, ekosistem mangrove dimasukkan dalam satu ekosistem pendukung kehidupan yang penting dan perlu dilestarikan keberadaannya. Mengingat rentannya keberadaan hutan mangrove dan peranan masyarakat yang tinggal di sekitar hutan mangrove dalam menjaga sumber daya alamnya, maka peranan masyarakat dalam menjaga kelestarian bahkan mengembangkan hutan mangrove menjadi suatu hutan lingkungan pendukung ketersediaan sumber daya alam laut menjadi begitu sangat penting. Partisipasi masyarakat dalam pengelolaan hutan mangrove di Kabupaten Halmahera Utara merupakan pokok perhatian dalam penelitian ini, mengingat daerah tersebut diduga sebagai spawning ground dan nursery ground bagi ikan julung-julung. Tujuan dari penelitian ini adalah untuk mengukur tingkat kesadaran masyarakat akan pentingnya hutan mangrove di Kabupaten Halmahera Utara; mengetahui bentuk dan besarnya partisipasi masyarakat dalam pengelolaan hutan mangrove di Kabupaten Halmahera Utara; mengetahui faktor-faktor yang mempengaruhi partisipasi masyarakat dalam pengelolaan hutan mangrove di Kabupaten Halmahera Utara; merumuskan kebijakan yang dapat diambil dalam pengelolaan hutan mangrove di Kabupaten Halmahera Utara. Hasil pengamatan di 3 lokasi ditemukan hutan mangrove yang cukup lebat, dan ditemukan 9 spesies yaitu: Rhizophora apiculata, R. stylosa, Sonerita alba, S. caseolaris, Bruguiera gymnorrhiza, B. cylindrica, Ceriops tagal, Exoecaria agalloca dan Avicenia sp. Hasil pengamatan vegetasi mangrove di lokasi penelitian dapat disimpulkan bahwa pada ketiga lokasi penelitian, hanya Pulau Tagalaya memiliki ekosistem mangrove yang sangat baik, lebih baik dari kedua lokasi lainnya yaitu Galela Utara dan Desa Mawea. Hal ini karena Pulau Tagalaya merupakan Kawasan Konservasi laut untuk terumbu karang dan mangrove....dst
Keyword: mangrove ecosystems, community participation, fishing, North Halmahera

Judul: Komposisi Jenis Mangrove dan Pengetahuan Masyarakat tentang Kawasan Mangrove, Desa Sayoang, Halmahera Selatan
Abstrak: The area of mangrove forests in Indonesia is currently only spanning as much as 3.4 milion acres, so there is a need for the participation of the government and community to maintain its sustainability. South Halmahera is the district with the largest mangrove area in the North Maluku province. One of the mangrove areas in the district of South Halmahera is located at Sayoang Village, East Bacan District. Up until its eleventh founding anniversary, this district have never conducted an inventorizing of its mangroves, both ecological and social studies in the field of public. This study aims to analyze the compotition of mangrove species in Sayoang Village, East Bacan District, South Halmahera, and identify the knowledge of surrounding communities of mangrove areas as protected areas. Data were retrieved using sampling method with applications terraced paths, and analyzed by calculating its important value index (INP) and its index value diversity (IVD). The public social data were taken using in-depth interviews and questionnaires. Results obtained from this study show that the mangrove forest in Sayoang village, East Bacan district, Halmahera, consists of major mangrove species with as many as eleven species belonging to families Rhizophoraceae, Sonneratiaceae, Aviceniaceae, Meliaceae and Myrtaceae, and as many as three species of minor mangrove belonging to families of Lorantaceae, Acanthaceae, and Pteridaceae. The mangrove's species diversity and richness is and low, but it has high evenness. 60% of total respondents know the benefit of mangrove as fish habitat, while for mangrove area as conserving areas, 50% of total respondent don't know the status of the area. The cutting problems happened in mangrove areas, 90% of total respondent know the activity and 85% of total respondent think that the logging activities in mangrove area is still allowed. The management activity of mangrove area in Sayoang village hasn't been conducted, either by the community or by local Dinas Kehutanan, and 53% of total respondent still wishing the mangrove can give more benefit economically.
Keyword: Bogor Agricultural University (IPB), community knowledge, mangrove protected areas, Mangrove forest

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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