Judul: Dinamika Faktor-Faktor Pengelolaan Sumber Daya Ikan Peperek (Eublekeeria Splendens, Cuvier 1829) Di Perairan Selat Sunda
Abstrak: Ikan Peperek termasuk kelompok ikan demersal yang mempunyai nilai ekonomis dan tersebar di seluruh wilayah Perairan Indonesia, salah satunya di Perairan Selat Sunda. Ikan ini merupakan hasil tangkapan sampingan yang diolah menjadi ikan asin, walaupun demikian Ikan Peperek merupakan ikan yang dominan didaratkan di PPP Labuan Banten dengan menggunakan alat tangkap berupa jaring arad (trawl). Tujuan penelitian ini adalah untuk untuk menduga pengelolaan yang tepat bagi Ikan Peperek Eublekeeria splendens di Perairan Selat Sunda berbasiskan analisis parameter pertumbuhan dan analisis catch-revenue. Penelitian ini dilakukan pada bulan Mei hingga September 2014 dan Maret 2015. Jumlah total ikan contoh yang diambil mencapai 546 ekor. Hasil penelitian menunjukkan Ikan Peperek memiliki pola pertumbuhan isometrik, dan mempunyai hasil tangkapan yang berfluktuatif. Laju eksploitasi Ikan Peperek betina dan jantan telah melebihi laju eksploitasi optimum. Pengelolaan yang dapat direkomendasikan yaitu pengaturan upaya penangkapan, pengaturan musim penangkapan, serta mengatur kerjasama antara nelayan dan pemerintah.
Keyword: Ikan Peperek, pengelolaan, pertumbuhan, Selat Sunda

Judul: Dinamika Populasi Ikan Pepetek (Leiognathus equulus Forsskål, 1775) di Perairan Selat Sunda.
Abstrak: Ikan pepetek merupakan sumberdaya ikan demersal. Karakteristik sumberdaya ikan yang bersifat open acces menjadikan semua pihak dapat memanfaatkan sumber daya dengan bebas. Penelitian ini bertujuan untuk mengkaji stok ikan pepetek di perairan Selat Sunda berdasarkan data hasil tangkapan yang didaratkan di PPP Labuan, Banten. Penelitian ini dilakukan pada bulan April sampai Agustus 2015. Analisis data meliputi rasio kelamin, hubungan panjang dan bobot, parameter pertumbuhan, laju eksploitasi, dan model produksi surplus. Hubungan panjang dan bobot memiliki pola pertumbuhan allometrik negatif. Panjang pertama kali matang gonad ikan jantan dan betina adalah 178,6 mm dan 133,0 mm. Panjang asimtotik ikan jantan dan betina adalah 290,75 mm dan 250,75 mm. Upaya optimum berdasarkan model Fox adalah 1334 trip dan hasil tangkapan lestari sebesar 1611,16 ton. Ikan pepetek di perairan Selat Sunda mengalami overexploitasi.
Keyword: Ikan pepetek, stok, laju eksploitasi, upaya optimum

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