Judul: Pengaruh kombinasi auksin dan sitokinin terhadap organogenesis eksplan melinjo (Gnetum gnemon Linn.)
Abstrak: Perbanyakan melinjo dengan menggunakan teknik in vitro sangat memungkinkan. Sebagai bahan eksplan tunas terminal jauh le bih baik daripada tunas buku tunggal pertama. Pertumbuhan tunas sangat dipengaruhi oleh kinetin. Kinetin 1.5-2.0 mg/1 paling baik untuk pertumbuhan tunas. Persentase tumbuh eksplan dipengaruhi oleh interaksi antara IAA dan kinetin Kombinasi IAA rendah (0.1 mg/1) dengan kinetin tinggi (2. 3.0 mg/l), IAA agak tinggi (0.3 mg/1) dengan kinetin agak rendah samapai tinggi (1.5-2.5 mg/1), dan IAA tinggi (0.5 mg/1) dengan kinetin rendah sampai tinggi (0.5-2.5 mg/1).
Keyword: Gnetum gnemon, Biotechnology sitokin, Auksin

Judul: Pengaruh Kombinasi Perlakuan Pangkas Akar, Inokulasi Fungi Ektomikoriza Dan Stimulan Akar Organik Terhadap Pertumbuhan Bibit Melinjo
Abstrak: Kegiatan pangkas akar yang dikombinasikan dengan inokulasi fungi ektomikoriza (ECM) dapat meningkatkan kolonisasi fungi ECM dan pertumbuhan bibit melinjo (Gnetum gnemon). Pemberian stimulan akar organik dapat meningkatkan pertumbuhan akar. Penelitian ini bertujuan untuk mengetahui pengaruh kombinasi perlakuan pangkas akar, inokulasi fungi ECM dan pemberian stimulan akar organik terhadap keberhasilan kolonisasi fungi ECM dan pertumbuhan bibit melinjo. Penelitian ini dilakukan di rumah kaca menggunakan rancangan acak lengkap (RAL) faktorial, dengan 3 faktor yaitu (1) pangkas akar (tingkat pangkas akar 0% dan 30%), (2) inokulasi fungi ECM (inokulum fungi 0 g/bibit dan 5 g/bibit) dan (3) pemberian stimulan akar organik (konsentrasi 0.00% dan 1.25%). Hasil penelitian menunjukkan bahwa bibit melinjo yang diberi perlakuan dengan (a) pangkas akar (30%) + stimulan akar (1.25%) mempengaruhi pertumbuhan tinggi yang lebih baik, (b) perlakuan inokulum fungi (5 g/bibit) + stimulan akar (0.00%) mempengaruhi berat kering akar, berat kering pucuk dan berat kering total (BKT), dan (c) kombinasi perlakuan pangkas akar (30%) + inokulum fungi (5 g/bibit) + stimulan akar (1.25%) mempengaruhi pertumbuhan tinggi setelah 8 bulan perlakuan.
Keyword: pangkas akar, ektomikoriza, Gnetum gnemon, stimulan akar organik

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