Judul: Suatu Studi Penangkapan Ikan Dengan Bubu di Kecamatan Nusaniwe, Daerah Tingkat II Kotamadya Ambon
Abstrak: Nelayan bubu di Kecamatan Nusaniwe dalam menentukan fishing groundnya, masih mengikuti pengalaman secara tu- run-temurun. Keadaan ini menyebabkan areal penangkapan- nya tidak bergeser lebih luas, melainkan tetap pada areal yang dikenalnya. Tanate, adalah waktu penangkapan yang baik berdasar- kan umur hari bulan. Dalam satu periode revolusi bulan mengelilingi bumi, terjadi dua kali tanate. Selain dari waktu tanate ini, bukan merupakan waktu penangkapan yang caik. Penelitian ini bertujuan, untuk: (1) mencari areal Demasangan baru dari alat bubu, (2) mengetahui pengaruh waktu penangkapan dan perbedaan kedalaman areal pemasang- an terhadap hasil tangkapan bubu, (3) mengetahui jenis- jenis ikan yang dominan tertangkap pada kedalaman tertentu.
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Judul: Perbedaan Jenis Umpan Terhadap Hasil Tangkapan Ikan Baung (Mystus nemurus CV) menggunakan Bubu di Sungai Batang Kumu
Abstrak: Usaha penangkapan ikan baung (Mystus nemurus CV) di Desa Pujud Kabupaten Rokan Hilir dengan menggunakan alat tangkap bubu sudah dilakukan oleh nelayan setempat dengan daerah operasi penangkapan di Perairan Sungai Batang Kumu. Bubu yang sering dipakai nelayan setempat adalah bubu tanpa umpan. Salah satu faktor yang menentukan keberhasilan penangkapan ikan dengan bubu adalah umpan, sehingga penulis tertarik untuk melakukan penelitian perbedaan umpan terhadap hasil tangkapan bubu. Tujuan dari penelitian ini untuk menghitung jumlah, bobot, ukuran panjang total hasil tangkapan dominan bubu dan keragaman hasil tangkapan. Metode penelitian yang digunakan adalah experimental fishing. Data diperoleh dengan melakukan operasi penangkapan sebanyak 24 bubu. Pengoperasikan bubu sebanyak 24 unit dibagi 3 perlakuan yang masing–masing 8 unit dengan bubu menggunakan umpan ikan rucah, bubu menggunakan umpan buah sawit dan bubu tanpa umpan. Total hasil tangkapan, bobot hasil tangkapan dan ukuran hasil tankapan yang dominan dengan umpan yang berbeda di analisis dengan Kruskal Wallis. Keragaman hasil tangkapan dianalisis dengan indeks Shannon Wiener. Hasil penelitian menunjukkan bahwa hasil tangkapan dominan adalah ikan baung sebanyak 57% dari total hasil tangkapan. Hasil uji Kruskal Wallis pada jumlah hasil tangkapan menunjukkan perbedaan nyata pada taraf nyata 0,05. Hasil uji Kruskal Wallis pada total bobot hasil tangkapan menunjukkan perbedaan nyata pada taraf nyata 0,05. Hasil uji Kruskal Wallis pada panjang total hasil tangkapan menunjukkan perbedaan nyata pada taraf nyata 0,05 pada spesies ikan baung dan ikan tawes. Keanekaragaman tertinggi terdapat pada bubu tanpa umpan.
Keyword: bubu, ikan baung, pengaruh umpan, Sungai Batang Kumu

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