Judul: Kajian Sumberdaya Terumbu Karang untuk Pengembangan Ekowisata Bahari di Perairan Kecamatan Semau, Kabupaten Kupang, Provinsi Nusa Tenggara Timur.
Abstrak: The waters of Semau Subdistrict have the potential of coral reef resources but not managed optimally for tourism activities because to lack of scientific information. This study aimed to: analyze the suitability, estimate the value of the visual seascape and images of biota, knowing the public perception and development patterns of coral reefs resources for the development of sustainable marine ecotourism in the waters of Semau Subdistrict. The data collection method is to use transect quadrant method for coral reefs, underwater visual census for reef fishes and interview for visual value. The conditions of social, economic, cultural and perception community knew through direct interviews with local residents. Formulas used for the management plan are suitability index tourism, scenic beauty estimation, zoning and SWOT analysis. The results show that coral reef resources in the waters of Semau Subdistrict feasible to be developed for two types of marine ecotourism. Diving tourism is located in the waters of Kambing Island and the Tanjung Uikalui, snorkeling tourism is located in Uiasa and Otan with appropriate category. Value of the visual landscape and images of biota coral reefs are high enough to be used as an object for development of marine ecotourism. Must local communities and government are very supportive to the development of the existing coral reef resources as a location for marine ecotourism. The strategy which is priority is the implementation of marine ecotourism activities, particularly diving and snorkeling tours in sustainable way and economic improvement of society through alternative livelihoods.
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Judul: Kajian kesesuaian perairan pesisir desa Kawai Kabupaten Maluku Tengah bagi pengembangan ekowisata
Abstrak: Kegiatan wisata yang sedang berjalan di Desa Sawai saat ini berhadapan dengan berbagai masalah yaitu: (a) indiiasi kerusakan terumbu karang pada beberapa bagian perairan, (b) tidak semua pemangku kepentingan terlibat dalam pengelolaan kegiatan wisata, dan (c) belum terarahnya pengelolaan wisata saat ini. Oleh karena itu penelitian ini dilakukan dengan tujuan menganalisis kondisi dan potensi sumberdaya pesisir dan laut, sebagai sumberdaya utarna pengembangan kegiatan ekowisata, mengindentifikasi para pemangku kepentingan yang terlibat dalam kegiatan ekowisata, menganalisis kesesuaian kawasan dan menentukan strategi pengelolaan ekowisata ke depan. Penelitian berlangsung pada bulan November 2008 yang meliputi: (1) survei awal dan koleksi data sekunder, (2) pengumpulan data primer yang terdiri atas pengumpulan data kondisi terumbu karang, ikan karang, parameter lingkungan dan data sosek, (3) analisis data dan penulisan laporan. Metode identifikasi kondisi ikan karang dan terumbu karang memjuk English et al. 1994. Pengambilan data sosial ekonorni dilakukan melalui wawancara kepada responden dan juga melalui penelusuran data sekunder. Analisis kesesuaian ekowisata bahari dan daya dukung kawasan dilakukan merujuk Yulianda (2007).
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Judul: Algorithm construction of HLI hash function
Abstrak: Cryptography is a study of mathematical techniques related to aspects of information security regarding on confidentiality, data integrity, entity authentication, and data origin authentication. Data integrity is a service, which is associated with the conversion of data carried out by unauthorized parties. To maintain data integrity, one can use hash functions. An hash function is a computationally efficient function to map an arbitrary length bitstring to a fixed length bitstring called as hash value. The use of hash function in maintaining the information integrity and authentication is in digital signatures, virus protection, and software distribution. Illustration of the hash function in the integrity and authentication of information that is emailed as follow. The sender sends the information and hash value to the recipient. If the hash value of the information is equal to the hash value that is sent by the sender, then information has not been changed. Otherwise the information has been changed. An hash function has two properties, one way and collision resistance. An hash function is called one way if it is computationally infeasible to find any input such that when given any hash value . Meanwhile an hash function is called collision resistant if it is computationally infeasible to find any two inputs where such that . The purpose of this study is to construct a HLI hash function algorithm, to analyze the speed and security of the hash functions as a results of construction. Furthermore, it is to compare it with SWIFFT. Hash function is constructed based on the result of algebraic operations on modular polynomial ringwith . Modular polynomial ring noted as is a set of all polynomials of degree at most with coefficients in . can be represented as a set of integer vector of modulo in dimension . So, it is simple to implement in a computer. In vector operations, is lattice . Furthermore, alattice that is defined from certain polynomial ring is called ideal lattice. HLI hash function is consists of addition and multiplication algorithm in the ring. Addition algorithm consists of sumation operations of modulo and multiplication consists of multiplication operations of modulo . Generally, algorithm of HLI hash function consists of multiplication operations of modulo and addition operations of modulo . However, if the input is binary number then multiplication algorithm only consists of multiplication operation of modulo , so algorithm of HLI hash function consists of multiplication operations of modulo and addtion operations of modulo . An hash function is secured if it has two properties, i.e., one way and collision resistance. HLI hash function hash is one way, it is following the proof of Micciancio. It is has collision resistant because of polynomial is irreducible over and monic. Moreover, it is proved that for every unit vector , the vector is small vector. If the input of hash function is a binary number then HLI hash function only involves addition operations of modulo . So the time that used almost same with SWIFFT. The excellence of HLI hash function is the key size smaller than SWIFFT. This effect on
Keyword: hash function, modular polynomial ring, lattice