Judul: Pengaruh Pemberian Pupuk Kandang dan Pengaturan Jarak Tanam terhadap Pertumbuhan dan Produksi Sedap Malam (Polianthes tuberosa L.)
Abstrak: Tujuan percobaan adalah untuk mempelajari pengaruh penggunaan beberapa janis pupuk kandang (kotoran ayam, kambing dan sapi) etrhadap pertumbuhan dan produksi Sedap Malam serta untuk mengetahui jarak tanam terbaik (populasi optimum) bagi pertumbuhan dan produksi Sedap Malam.
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Judul: Pengaruh pemberian pupuk kandang terhadap perkecambahan, pertumbuhan bibit dan pengaruhnya terhadap produksi di lapang
Abstrak: Penelitian pengaruh pemberian pupuk kandang terhadap perkecambahan, pertumbuhan bibit dan pengaruhnya terhadap produksi di lapang dilaksanakan di rumah kaca BDP, kebun percobaan Muara Balittan dan Laboratorium Ilmu dan Teknologi Benih Baranangsiang. Penelitian dilaksanakan mulai bulan September 1994 sampai bulan Januari 1995. Penelitian ini bertujuan untuk melihat pengaruh dari pemberian berbagai jenis pupuk kandang terhadap perkecam- bahan dan pertumbuhan bibit serta pengaruhnya terhadap produksi di lapang. Benih yang dipakai adalah benih jagung manis (Zea mays saccharata). Penelitian terdiri dari dua percobaan, percobaan I untuk melihat pengaruh media yang diberi pupuk kandang terhadap perkecambahan benih dalam lingkungan yang terkon- trol, percobaan II untuk mengetahui pengaruh pupuk kandang terhadap pertumbuhan bibit dan pengaruhnya terhadap pro- duksi di lapang. Rancangan Percobaan I dan II yaitu Ran- cangan Acak Kelompok dengan 13 perlakuan. Perlakuan ter- diri dari kontrol, pupuk kandang ayam dengan dosis 5 ton /ha, 10 ton/ha, 15 ton/ha, 20 ton/ha. Pupuk kandang sapi dan kambing perlakuan sama seperti pupuk kandang ayam yaitu 5 ton/ha, 10 ton/ha, 15 ton/ha, dan 20 ton/ha. Tolok ukur yang diamati pada percobaan I yaitu daya ber- kecambah, keserempakan tumbuh dan bobot kering kecambah, pengamatan pada percobaan II yaitu daya tumbuh benih, vi- gor bibit, luas segitiga stamina, hari keluar malai, pan- jang dan lingkar tongkol, bobot 1000 butir, bobot tongkol dan bobot pipilan. Pengujian viabilitas benih yang diha- silkan karena perlakuan pupuk kandang dengan tolok ukur daya berkecambah, keserempakan tumbuh dan kecepatan tumbuh. Hasil penelitian menunjukkan bahwa pemberian pupuk kandang dapat meningkatkan pertumbuhan dan produksi di lapang. Pemberian pupuk kandang ayam dengan dosis di atas 5 ton/ha meningkatkan pertumbuhan tanaman dengan tolok ukur daya tumbuh, vigor bibit, luas segitiga stamina dan mempercepat keluarnya malai. Perlakuan pupuk kandang sapi dan kambing untuk parameter pertumbuhan tanaman tidak berbeda dengan kontrol…dst
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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