Judul: Pengaruh pupuk majemuk dan zat pengatur tumbuh terhadap pembiakan dua varietas kentang secara in vitro
Abstrak: Percobaan ini dilakukan di Laboratorium Kultur Jaring- an, Jurusan Budidaya Pertanian, Fakultas Pertanian, Insti- tut Pertanian Bogor, dari awal bulan Juli 1984 sampai bulan September 1985. Tujuan percobaan ini adalah untuk mempela- jari kemungkinan penggunaan pupuk majemuk Gandasil D 14-12- 14 dan Hyponex 20-20-20 serta pengaruh zat pengatur tumbuh 2,4-D dan BA terhadap pembiakan in vitro kentang. Percobaan ini terdiri dari empat faktor, yaitu: media, zat pengatur tumbuh 2,4-D dan BA serta varietas. Media ter- diri dari tiga taraf, yaitu: media Murashige dan Skoog (MS), media pupuk Gandasil D 14-12-14 dan media pupuk Hyponex 20- 20-20. Zat pengatur tumbuh 2,4-D terdiri dari dua taraf, yaitu: 0.0 ppm dan 0.01 ppm. Zat pengatur tumbuh BA terdi- 1 dari dua taraf, yaitu: 0.0 ppm dan 1.0 ppm, sedangkan varietas kentang terdiri dari varietas PAS 3063 dan PAS 4050. Kombinasi dari empat faktor tersebut menghasilkan 24 perla- kuan dimana tiap perlakuan terdiri dari 20 ulangan. Eks- plan yang dipergunakan adalah tunas ketiak, dimana tiap eks- plan terdiri dari dua mata tunas. Pengamatan dilakukan ter- hadap persentase pembentukan kalus, persentase kematian kultur, jumlah akar, jumlah tunas, jenis tuna panjang tunas...
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Judul: Produksi bibit kentang in vitro siap pakai melalui seleksi media dan daya simpan
Abstrak: Penelitian ini bertujuan menyeleksi media yang menghasilkan propagul tunas mikro kentang kultivar Atlantic yang jagur dan melihat pengaruh paclobutrazol dan lama penyimpanan terhadap viabilitasnya. Penelitian dilaksanakan di Laboratorium Kultur Jaringan Jurusan Budi Daya Pertanian, IPB. Penelitian ini terdiri dari dua percobaan berurutan yakni percobaan pen- dahuluan (seleksi media) dan percobaan daya simpan. Rancangan percobaan pendahuluan (seleksi media) ialah rancangan acak lengkap faktor tunggal. Faktor tunggal ini terdiri atas: media 1 (garam MS), media 2 (garam MS + kom- posisi ZPT IAA 1 ppm, kinetin 5 ppm, paclobutrazol 0,1 ppm), media 3 (garam MS dengan modifikasi kalium 30 mM), media 4 (garam MS dengan modifikasi kalium 30 mM + komposisi ZPT IAA 1 ppm, kinetin 5 ppm, paclobutrazol 0,1 ppm), media 5 (garam MS dengan modifikasi nitrogen 90 mM), media 6 (garam MS dengan modifikasi nitrogen 90 mM komposisi ZPT IAA 1 ppm, kinetin 5 ppm, paclobutrazol 0,1 ppm), media 7 (garam MS dengan modifikasi nitrogen 90 mM dan kalium 30 mM), dan media 8 (garam MS dengan modifikasi nitrogen 90 mM dan kalium 30 mM + komposisi ZPT IAA 1 ppm, kinetin 5 ppm, paclobutrazol 0,1 ppm). Terdapat 10 ulangan pada masing-masing perlakuan. Pengamatan dilakukan terhadap jumlah tunas, jumlah daun per tunas, tinggi tunas, dan jumlah akar yang terbentuk pada umur panen 3 minggu.
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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