Judul: Pengaruh konsentrasi nitrogen dan sukrosa terhadap produksi umbi mikro kentang kultivar granola
Abstrak: Salah satu masalah dalam budidaya kentang di Indonesia adalah penyediaan bibit melalui pengembangan propagul kentang bermutu. Usaha untuk mendapatkan bibit kentang yang berkualitas baik dapat dilakukan melalui teknik kultur jaringan berupa umbi mikro. Komposisi media merupakan salah satu faktor yang mempengaruhi produksi umbi mikro. Tujuan penelitian ini adalah untuk mengetahui konsentrasi nitrogen yang optimum untuk pertumbuhan stek dan pengumbian mikro kentang, mengetahui konsentrasi sukrosa yang optimum untuk pertumbuhan stek dan pengumbian mikro kentang dan mengetahui kombinasi antara konsentrasi nitrogen dan sukrosa yang optimum untuk pertumbuhan stek dan pengumbian mikro kentang. Penelitian ini terdiri dari dua tahap percobaan: pertama pengaruh konsentrasi nitrogen dan sukrosa pada pertumbuhan stek mikro kentang dan kedua pengaruh konsentrasi nitrogen dan sukrosa pada pengumbian mikro kentang. Percobaan dilakukan dengan Rancangan Acak Lengkap yang terdiri atas 2 faktor. Faktor pertama adalah konsentrasi nitrogen dengan 4 taraf ( 30, 60, 90 dan 120 mM). Faktor kedua adalah konsentrasi sukrosa dengan 5 taraf ( 30, 45, 60, 75 dan 90 g/l). Data diuji dengan Sidik ragam (uji F), uji beda nilai tengah menggunakan DMRT dan uji Polinomial Orthogonal.
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Judul: Pengaruh Media Tanam, Jenis dan Konsentrasi Pupuk Daun terhadap Produksi Stek Mini Kentang ( Solanum tuberosum L.) Kultivar Granola
Abstrak: Penelitian ini bertujuan untuk mengetahui pengaruh medai tanam dan jenis serta konsentrasi pupuk daun terhadap produksi stek mini kentang. Penelitian ini dilandasi oleh pemikiran untuk meningkatkan efisiensi produksi bibit kentang bermutu melalui kultur jaringan. Penelitian dilaksanakan pada bukan Maret sampai Agustus 1999 dirumah kasa Cugerang, Cianjur dengan ketinggian 1000 m dpl. Penelitian terdiri atas dua percobaan yang masing-masing percobaan menggunakan Rancangan Acak Lengkap. Percobaan pertama terdiri atas dua faktor berupa perlakuan jenis media tanam dengan 3 taraf, yaitu arang sekam, terracotten, kompos, dan tanah dan perlakuan jenis pupuk daun dengan 3 taraf, yaitu gandasil-D2 g/l, vitabloom 2 g/l dan bayfolan 3 ml/l, sedangkan percobaan kedua terdiri atas dua faktor berupa perlakuan media tanam dengan 3 taraf, yaitu arang sekam, tanah dan campuran arang sekam-tanah dan perlakuan konsentrasi pupuk daun vitabloom dengan 4 tarf, yaitu 0 g/l, 1 g/l, 2 g/l, dan 4 g/l.
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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