Judul: Pengelolaan Sumberdaya Paus Biru (Balaenoptera Musculus Linnaeus, 1758) Berbasis Traditional Ecological Knowledge (Tek) Di Lamakera Nusa Tenggara Timur
Abstrak: Paus biru (Balaenoptera musculus) merupakan salah satu hewan yang menjadi target penangkapan paus secara tradisional di Lamakera, Nusa Tenggara Barat. Paus biru mengalami ancaman kepunahan dan masuk dalam daftar merah IUCN (EN). Penelitian ini bertujuan untuk mengkaji aspek bio-ekologi dan morfologi paus biru serta mengidenfifikasi komponen Traditional Ecological Knowledge (TEK) pada kegiatan penangkapan paus biru di Lamakera. Metode yang digunakan adalah observasi, wawancara mendalam, dan studi literatur. Paus biru yang ditangkap masyarakat Lamakera pada Maret 2015 memiliki panjang tubuh 11 m, berat tubuh 7 ton, volume tubuh 6,86 m3, luas permukaan tubuh 0,69 m2, dan koefisien volumetrik 5,15. Nelayan Lamakera merupakan nelayan kecil dengan kapal perikanan kurang dari 5 GT. Hasil tangkapannya berupa pari manta, pari, hiu, tuna, selar, paus, dan lumba-lumba. Penangkapan paus menggunakan perahu (tena) bermotor, tombak besar (kohawek), tombak kecil (beladek), dan tali. Pengetahuan ekologi tradisional ditemukan berupa pengenalan jenis, tingkah laku, jenis kelamin, area migrasi serta musim migrasi mendasari pengelolaan penangkapan paus biru di Lamakera.
Keyword: Daftar merah IUCN (EN), lamakera, paus biru, penangkapan paus, pengetahuan ekologi tradisional

Judul: Pengelolaan Sumberdaya Paus Sperma (Physeter
macrocephalus) Berbasis Traditional Ecological Knowledge (TEK) di Desa
Lamalera, Nusa Tenggara Timur.
Abstrak: Kegiatan penangkapan paus sperma (Physeter macrocephalus) di Lamalera merupakan kegiatan penangkapan dengan teknik dan teknologi tradisional. Mamalia laut ini ditangkap dengan perahu kayu dengan alat tangkap sederhana berupa tempuling atau harpoon. Paus sperma hasil tangkapan berukuran antara 4,5-20 m untuk jantan dan 5-14 m untuk betina. Jumlah tangkapan paus sperma sejak tahun 1991 hingga 2014 sebanyak 407 individu. Traditional Ecological Knowledge (TEK) yang terdapat di dalam masyarakat Lamalera terkait dengan kegiatan penangkapan paus sperma yaitu pengetahuan mengenai daerah penangkapan, teknologi dan teknik penangkapan, serta pengaturan mengenai musim penangkapan. Pengelolaan sumberdaya berbasis masyarakat (PSBM) merupakan salah satu alternatif pengelolaan sumberdaya paus sperma yang dapat diterapkan di Desa Lamalera.
Keyword: paus sperma, penangkapan tradisional, traditional ecological knowledge (TEK)

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