Judul: Pengaruh Pupuk Organik M-Dext dan NASA terhadap Produksi Daun Murbei (Morus cathayana) dan Kualitas Kokon Ulat Sutera (Bombyx mori L.)
Abstrak: Persuteraan alam merupakan salah satu bentuk kegiatan pengembangan aneka usaha kehutanan yang mempunyai peran cukup besar dalam menunjang program pemerintah untuk memperluas kesempatan berusaha di bidang pertanian, kehutanan dan perkebunan, industri dan perdagangan. Dilihat dari jumlah permintaan benang sutera ternyata kebuthan industri sutera yang ada saat ini belum tercukupi maka perlu dilakukan usaha untuk meningkatkan produksi kokon ulat sutera yang dihasilkan. Salah satu usaha untuk meningkatkan produksi kokon ulat sutera adalah dengan meningkatkan produksi dari daun murbei yang merupakan pakan utama ulat sutera dengan memberi nutrisi makanan melalui pemupukan dengan dosis yang tepat dan ekonomis. Tujuan dari penelitian ini adalah untuk mengetahui pengaruh pupuk terhadap pertumbuhan dan produksi daun murbei (Morus cathayana) da pengaruh pakan pakan daun murbei hasil pemupukan terhadap kualitas kokon (Bombyx mori L.)
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Judul: Pengaruh Pupuk terhadap Produksi Daun dan Perkembangan Akar Stek Murbei (Morus cathayana L.)
Abstrak: Untuk mampu memenuhi kebutuhan industri benang sutera dalam negeri, pemerintah perlu mendorong petani ulat sutera untuk meningkatkan produksi kokon. Upaya peningkatan produksi kokon bisa ditempuh melalui cara intensifikasi dan ekstensifikasi. Upaya intensifikasi dapat ditempuh melalui cara pemberian nutrisi makanan melalui pemupukan, sedangkan upaya ekstensifikasi dapat ditempuh melalui perluasan kebun murbei. Bahan perbanyakan tanaman murbei bisa berupa benih dan stek batang. Stek batang sebagai bahan perbanyakan tanaman lebih umum dilakukan. Penelitian pengaruh pupuk terhadap pertumbuhan stek murbei dilakukan dalam kondisi rumah kaca. Penelitian ini bertujuan untuk mengetahui pengaruh pupuk terhadap produktivitas tanaman khususnya pertumbuhan daun dan akar. Jenis pupuk yang diuji dalam penelitian ini adalah pupuk organik dan pupuk anorganik. Pupuk organik yang diuji bermerk dagang M-Dext, NASA, dan Hormonik, serta pupuk kandang, sedangkan jenis pupuk anorganik yang diuji adalah Urea, TSP, dan KCl. Adapun dosis pupuk organik adalah campuran 5 lt MDext + 30 kg pupuk kandang per Ha, 12 lt M-Dext + 80 kg pupuk kandang per Ha, 20 lt M-Dext + 130 kg pupuk kandang per Ha, 5 lt NASA + 2.5 lt Hormonik per Ha, 12 lt NASA + 6 lt Hormonik per Ha, 20 lt NASA + 10 lt Hormonik per Ha. Sedangkan dosis pupuk anorganik adalah campuran 25 kg Urea + 12.5 kg TSP + 12.5 kg KCl per Ha, 75 kg Urea + 37.5 kg TSP + 37.5 kg KCl per Ha, 125 kg Urea + 62.5 kg TSP + 62.5 kg KCl per Ha.
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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