Judul: slektivitas Jaring Jodang Terhadap Keong Macan Di Palabuhanratu, Sukabumi, Jawa Barat
Abstrak: Keong maean (Babylonia spirata) merupakan salah satu sumberdaya hayati laut dari kelas gastropoda yang sangat laku di pasaran. Spesies ini sangat digemari karena memiliki kandungan protein yang sangat tinggi, rasanya enak, kandungan lendirnya rendah dan mudah pengolahannya. Satu-satunya jenis alat penangkap keong maean di Palabuhanratu adalah jaring jodang. Alat ini berupa perangkap yang diselimuti dengan jaring dari waring yang memiliki mata yang sangat keci!. Akibat ukuran mata jaring dasar perangkap yang sangat kecil, maka ketika dilakukan pengangkatan seluruh ukuran keong maean tertangkap. Selain itu, tingginya tingkat eksploitasi keong maean - sejalan dengan meningkatnya pennintaan pasar - menyebabkan kondisi sumberdaya keong maean di Palabuhanratu sangat menurun.
Keyword: 

Judul: Pengaruh Jenis Umpan dan Lama Perendaman Jaring Jodang terhadap Hasil Tangkapan Keong Macan (Babylonia Spirata L) di Teluk Pelabuhanratu Jawa Barat
Abstrak: Indonesia merupakan perairan yang sangat luas dan garis pantai yang panjang (nomer 2 didunia setelah Kanada) menyimpan potensi sumberdaya moluska, termasuk gastropoda. Salah satu hewan moluska tersebut adalah keong macan (Babylonia Spirata L) yang mempunyai nilai ekonomis yang penting. Teluk Pelabuhanratu merupakan daerah yang memiliki potensi dalam menghasilkan keong macan (Babylonia Spirata, L). Kegiatan penangkapan keong macan di Pelabuhanratu menggunakan alat tangkap sejenis jaring krendet yang dikenal dengan nama Jaring jodang. Salah satu faktor keberhasilan penangkapan keong macan dengan jaring jodang adalah umpan dan lama perendaman. Jenis umpan yang digunakan haruslah sesuai dengan makanan kesukaan keong macan dalam memakan jenis makanannya. Lama perendaman erat kaitannya dengan pengoperasian alat tangkap sehingga menentukan juga dalam keberhasilan penangkapan keong macan Tujuan dari penelitian ini adalah membandingkan hasil tangkapan keong macan dari jaring jodang dengan menggunakan jenis umpan berbeda dan lama perendaman alat berbeda, sehingga dapat dijadikan suatu informasi tentang umpan dan lama perendaman yang efektif dalam penangkapan keong macan. Penelitian ini dilakukan mulai Bulan Februari sampai Oktober bertempat di Perairan Teluk Pelabuhanratu. Sebagai bahan pembanding umpan digunakan umpan ikan runcah dan umpan kulit kambing. Penelitian ini menggunakan 20 unit alat tangkap jodang dan dilakukan dengan uji coba penangkapan (experimental fishing). Perlakuan yang dicobakan adalah jenis umpan dan lama perendaman.
Keyword: 

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