Judul: Analisis Efisiensi Pemasaran Udang Windu (Penaeus monodon) di Desa Panimbang, Serang, Banten.
Abstrak: Analisis Efisiensi Pemasaran Udang Windu (Penaeus monodon) di Desa Panimbang, Serang, Banten. ...
Keyword: 

Judul: Studi tentang pemasaran udang windu ( Penaeus monodon F ) di Kecamatan Sedati Sidoarjo
Abstrak: Tujuan penelitian ini adalah 1) untuk mengetahui gambaran umum pemasaran udang windu hasil tambak di Kecamatan Sedati. 2) untuk menganalisis hubungan antara "farmer's share" dengan keuntungan pedagang pengumpul dan biaya pemasaran pedagang pengumpul. 3) untuk menganalisis hubungan antara marjin pemasaran dengan keuntungan pedagang pengumpul dan biaya pemasaran pedagang pengumpul. 4) untuk menganalisis hubungan antara harga jual pedagang pengumpul dengan harga jual petani tambak. Metode yang digunakan dalam penelitian ini adalah metode survai. Pengambilan sampel petani tambak udang windu dilakukan secara acak sederhana. Analisa statistik yang digunakan adalah analisa korelasi regresi sederhana dan korelasi rank Spearman's. Pemasaran udang windu hasil tambak di Kecamatan Sedati umumnya melalui jalur pedagang pengumpul, keadaan ini disebabkan para petani tambak segan untuk menjual langsung ke perusahaan cold storage, karena hubungan antara petani tambak dengan pihak perusahaan kurang dekat bila dibandingkan dengan pedagang pengumpul, selain itu para petani kurang mengerti cara-cara sortasi dalam pembelian. Keadaan ini menyebabkan petani merasa dirugikan dalam praktek pembelian udang oleh perusahaan. Para petani tambak dalam menjual udangnya ke pedagang pengumpul dilakukan secara borongan dengan persetujuan harga antara kedua pihak. Para pedagang pengumpul dalam menjual udangnya biasanya telah memiliki langganan masing-masing perusahaan. Perusahaan ini bertindak sebagai penentu harga pembelian.
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