Judul: Analisis impor serat kapas di Indonesia
Abstrak: Industri tekstil nasional yang semakin berkembang ternyata telah mampu menjadikna ekspor Tekstil dan Produk Tekstil (TPT) sebagai komoditi utama penghasil devisa dari sektor non migas, bahkan menempati peringkat pertama dlam komoditi ekspor hasil industri. Pesatnya perkembangan industri TPT tentunya memerlukan dukungan penyediaan bahan baku, dan salah satunya adalah serat kapas yang memiliki kontribusi tervesar bagi industri TPT, dimana ketergantungan bahan baku industri tekstil akan serat kapas mencapai 50 persen. Namun ternyata sampai dengan Pelita IV dan V kebutuhan kapas untuk bahan baku tekstil di Indonesia masih dipenuhi dari impor. Pada periode 1994/1995 pangsa impor serat kapas Indonesia telah mencapai 99.6 persen yang sekaligus menjadikan Indonesia sebagai negara pengimpor kapas kedua terbesar di dunia serta merupakan negara pemakai serat kapas ketujuh terbesar di dunia.
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Judul: Sistem pengolahan benih kapas di proyek kapas PTP XXVI kebun asembagus situbondo dan balittri malang
Abstrak: Kapas merupakan salah satu komoditi penting dalam rangka memenuhi kebutuhan bahan baku pembuatan tekstil. Sejalan dengan kebutuhan sandang yang kian meningkat, persediaan serat kapas akan menjadi faktor penentu produksi tekstil. Kebutuhan serat kapas di Indonesia senantiasa mengalami peningkatan sejak Pelita I sampai dengan Pelita III. Perkembangan industri tekstil dalam negeri cukup baik, namun demikian kapasitas produksi serat di Indonesia masih belum mencukupi. Pada akhir Pelita III kebutuhan sandang diperkirakan akan mencapai 13,4 meter per kapita (Anonim, 1976). Pada tahun 1973/1974 industri tekstil di Indonesia telah memiliki 480000 buah mata pintal dan di- perkirakan akan menjadi 1,2 juta buah pada akhir pelaksanaan Pelita III (Anonim, 1977). Pada tahun 1974/1975 Indonesia memerlukan 66000 ton serat kapas dan 1250 serat lainnya. Bahan serat tersebut sebagian besar didatangkan dari luar negeri, kapasitas produksi serat kapas dalam negeri hanya mencapai 2% dari seluruh kebutuhan (Soepomo, 1976). Bertolak dari kondisi tersebut di atas, produksi serat kapas mendapat perhatian dari pemerintah. Sampai dengan akhir tahun Pelita III, ditargetkan perluasan pengembangan tanaman kapas mencapai 100000 hektar.
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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