Judul: Pengaruh umur dan padat penebaran terhadap pertumbuhan tukik penyu hijau Chelonia mydas L da dalam wadah jaring di teluk Rajegwesi taman Nasional Meru Betiri
Abstrak: Tujuan penelitian ini adalah untuk mengetahui tingkat pertumbuhan yang terbaik dari pemeliharaan tukik penyu hijau (C. mydas) di dalam wadah jaring dengan perlakuan perbedaan umur dan padat penebaran. Sehingga pada akhirnya dapat diperoleh suatu cara pemeliharaan dengan hasil yang terbaik untuk dapat menetapkan penangkaran yang terbaik dan ekonomis. teknik Penelitian dilaksanakan di perairan Teluk Rajegwesi Taman Nasional Meru Betiri. Bahan yang dipakai dalam penelitian ini adalah tukik penyu hijau yang baru menetas (berumur awal nol minggu) sebanyak 45 ekor dan tukik penyu hijau yang telah mendapat perlakuan pemeliharaan awal di dalam ember selama dua minggu (berumur awal dua minggu) sebanyak 45 ekor. Peralatan yang dipakai adalah wadah jaring yang dibuat dengan ukuran 1m X 1m X 0,75m sebanyak 12 petak. Tukik- tukik penyu hijau tersebut ditebarkan ke dalam wadah jaring dengan kepadatan 5 ekor tiap petak dengan tiga kali...
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Judul: Studi Penangkaran Tukik Penyu Hijau (Chelonia mydas L.) di Pangumbahan, Sukabumi
Abstrak: Penelitian ini bertujuan untuk mengetahui respon pertumbuhan tukik terhadap beberapa jenis makanan selama 10 minggu masa penangkaran. Dari hasil penelitian ini diharapkan akan memberikan informasi mengenai makanan yang dapat mengoptimalkan pertumbuhan tukik sehingga upaya pengelolaan terhadap populasi satwa tersebut dapat ditingkatkan. Penelitian dilaksanakan dari tanggal 23 Mei - 1 Agustus 2006 di Pangumbahan Kabupaten Sukabumi. Satuan uji menggunakan tukik berusia 7 hari sebanyak 27 ekor. Rancangan yang digunakan dalam penelitian ini adalah RAL dengan anak contoh, dengan tiga jenis makanan (cacahan: (A) udang air tawar, (B) keong mas dan (C) campuran keduanya) sebagai perlakuan dan jurnlah bak sebanyak tiga buah sebagai u1angan. Pengamatan pertumbuhan tukik dilakukan dengan mengukur panjang dan lebar karapas serta berat tubuh setiap dua hari. Selain itu, dilakukan pula pengukuran beberapa parameter fisika-kimia perairan. Analisis data meliputi model pertumbuhan, hubungan panjang dan lebar karapas, hubungan panjang karapas dan berat tubuh, uji F dan uji lanjut menggunakan Beda Nyata Jujur.
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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