Judul: Pengaruh Pemupukan Forfor dan Kotoran Ayam terhadap Pertumbuhan Vegetatif dan Serapan N, P, K Tanaman KEdelai (Glycine max (L.) Merr.) pada Podsolik Merah Kuning Jasinga
Abstrak: Penelitian ini bertujuan untuk mengetahui pengaruh pemupukan fosfor dan kotoran yama terhadap pertumbuhan vegetatif serta serapan N, P, K tanaman kedelai varietas Americana pada podsolik Merah Kuning Jasinga. Waktu penelitian dari bulan April sampai September 1984 dan dilaksanakan dilaboratorium rumah kada dan laboratorium rutin Jurusan Tanah, Fakultas Pertanian, Institut Pertanian Bogor.Bahan yang digunakan dalam penelitian ini, contoh podsolik merah kuning jasinga yang diambil dari kedalaman 0-30 cm secara komposit. Kedelai varietas Americana digunakan sebagai tanaman uji, yang dipelihara hingga umur 60 hari. Perlakuan fosfor diberikan dalam tiga taraf yaitu 0, 150 dan 300 ppm P. Sedangkan perlakuan kotoran ayam diberikan dalam tiga taraf yaitu 0, 15 dan 20 ton/ha. Sebagai pupu dasar digunakan pupuk urea, KCL dan Kapur CaCO3 yang setara dengan 1/4 SMP dengan pH buffer %.2. Rancangan percobaan digunakan Rancangan Acak Lengkap Faktorial dengan tiga ulangan.
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Judul: Pengaruh pengapuran, pemupukan fosfor dan pemberian terak baja terhadap pertumbuhan vegetatif pada podsolik merah kuning jasinga
Abstrak: Tujuan penelitian ini untuk mengamati pertumbuhan vegetatif tanaman kedelai yang memperoleh perlakuan kapur untuk menurunkan kemasaman tanah dan menambah hara Ca dan Mg, pemupukan fosfor untuk menambah ketersediaan fosfor dalam tanah serta mencoba melihat pengaruh pemberian silikat dari terak baja pada tanaman kedelai. Sebagai media tumbuh digunakan Podsolik Merah Kuning dari Jasinga Bogor yang diambil secara komposit pada kedalaman O - 25 cm. Percobaan disusun secara Faktorial dalam Rancangan Acak Lengkap dengan 18 perlakuan masing-masing dalam tiga ulangan. Dua taraf pengapuran masing-masing O dan 9.94 ton/ha yang setara dengan O dan 0.5 kebutuhan kapur menurut metode SMP. Tiga taraf pemupukan fosfor masing-masing 0, 200 dan 400 ppm P diberikan dalam bentuk TSP, serta tiga taraf pemberian silikat masing-masing 0, 100 dan 200 ppm Si02 diberikan dalam bentuk terak baja. Penelitian berlangsung dari bulan Januari dan berakhir pada bulan Mei 1983. ...
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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