Judul: Keadaan Umum Perikanan di Daerah Pesisir Musi Banyuasin Sumatera Selatan
Abstrak: Praktek umum ini dilaksanakan pada bulan Juli sampai bulan Agustus 1979 dengan mengambil tempat di Marga Sungsang, Kecanatan Banyuasin II Sumatera Selatan, dengan tujuan untuk mengenal dan mengetahui secara umum keadaan perikanan beserta problema yang dihadapi oleh masyarakat terutama masyarakat nelayan dan sejauh mungkin berusaha memecahkan permasalahannya. Metode yang digunakan dalam praktek ini adalah studi kasus. Data primer didapatkan melalui wa.wancara dengan nelayan dan pengusaha perikanan serta pemuka masyarakat, orientasi dan observasi ke lapangan, sedangkan data sekunder didapatkan dari Kantor Kecamatan Banyuasin II, Marga Sungsang dan instansi lain yang berkaitan berhubungan, selain itu dilengkari dengan literature yang berkaitan.
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Judul: Kajian pemenuhan kebutuhan pangan nelayan pada musim timur dan musim barat kaitannya dengan pemanfaatan sumberdaya pesisir: studi kasus di Kepulauan padaido, kecamatan padaido
Abstrak: Wilayah pesisir dan laut merupakan wilayah yang mempunyai kandungan sumberdaya alam yang besar. Akan tetapi kondisi kesejahteraan masyarakat pesisir termasuk kategori miskin. Hal ini hanya dapat diselesaikan dengan jalan membangun wilayah pesisir dan laut secara optimal sehingga pemanfaatan sumberdaya alam dapat dilakukan secara berkelanjutan dan sekaligus dapat meningkatkan dengan tetap memperhatikan kesejahteraan masyarakat pesisir. Kepulauan Padaido terdiri dari pulau-pulau besar dan kecil, yang ditunjang dari sumberdaya alam yang ada (khususnya laut) menjadikan sebagian besar masyarakat menggantungkan kehidupannya dari laut dengan matapencaharian sebagai nelayan. Berdasarkan laporan akhir survei perikanan dan sosial ekonomi di MCMA Biak Numfor menyatakan bahwa penangkapan ikan tidak dilakukan sepanjang tahun tetapi tergantung dari kondisi dan situasi perairan setempat terutama dilakukan pada musim melaut. Selain itu, laporan akhir studi sosial ekonomi, budaya dan lingkungan proyek MREP kawasan MCMA Biak Nurafor, menyatakan bahwa kondisi terumbu karang yang banyak mengalami kerusakan dan kepadatannya menurun
Keyword: Pangan, Pengelolaan wilayah pesisir

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