Judul: Pengaruh zat pengatur tumbuh kinetin terhadap pertumbuhan dan perkembangan tiga varietas tanaman kentang (Solanum tuberusum L) asal setek mikro
Abstrak: Tujuan penelitian ini adalah untuk mempelajari penga- ruh kinetin terhadap pertumbuhan dan perkembangan tiga va- rietas tanaman kentang asal setek mikro. Varietas yang di- gunakan adalah Red Pontiac, DTO 28 dan Granola. Percobaan diatur secara Split Plot, dimana varietas sebagai petak utama dan konsentrasi kinetin 0, 5 dan 10 ppm sebagai anak petak. Seluruhnya terdapat 9 kombinasi perlakuan dan ma- sing-masing perlakuan diulang 6 kali. Hasil penelitian menunjukkan bahwa penggunaan varietas yang berbeda menyebabkan perbedaan pada semua peubah vegetatif maupun hasil kecuali jumlah umbi/tanaman dan nisbah bobot kering umbi/total. Penggunaan kinetin dengan konsentrasi yang berbeda berpengaruh nyata pada bobot rata-rata umbi, persentase jumlah umbi lebih dari 20 g dan kurang dari 20 g. Interaksi antara varietas dan kinetin terlihat nyata pada tinggi tanaman, bobot basah dan bobot kering umbi/tanaman, bobot rata-rata umbi dan persentase jumlah umbi lebih dari 20 g dan kurang dari 20 g. Red Pontiac dan DTO 28 memberikan respon negatif ter- hadap pemberian kinetin sedangkan Granola memnerikan res- pon positif. Produksi kentang tertinggi diperoleh pada ta- naman kentang varietas DTO 28 tanpa pemberian kinetin….
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Judul: Pengaruh zat penghambat tumbuh paclobutrazol terhadap pertumbuhan dan perkembangan varietas tanaman kentang (Solamun tuberusum L.) asal stek mikro
Abstrak: Tujuan dari percobaan ini adalah mempelajari pengaruh zat penghambat tumbuh paclobutrazol terhadap pertumbuhan, perkembangan dan produksi tiga varietas tanaman kentang (Solanum tuberosum L.) asal setek mikro. Percobaan dilaksanakan di kebun percobaan IPB, Pasir Sarongge. Setek mikro yang digunakan merupakan hasil kul- tur jaringan. Varietas yang dicoba terdiri atas Red Pon- tiac, Katahdin dan Cipanas serta konsentrasi paclobutrazol yang digunakan adalah 0, 500 dan 1 000 ppm. Rancangan yang digunakan adalah split-plot didalam rancangan acak kelompok dengan pengacakan secara faktorial dan setiap perlakuan diulang enam kali. Dari hasil percobaan ternyata pemberian zat pengham- bat tumbuh paclobutrazol 500 dan 1 000 ppm menurunkan tinggi tanaman pada semua varietas yang dicoba. Penurun- an tinggi tanaman sejalan dengan penurunan jumlah buku dan panjang ruas tanaman. Penurunan bobot kering tajuk/tanaman untuk semua va- rietas dengan pemberian paclobutrazol 500 dan 1 000 ppm terjadi karena penurunan tinggi tanaman, jumlah buku ...
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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