Judul: Pembiakan Saninten (Castanopsis Argentea (Blume) A.Dc.) Melalui Stek Pucuk Dengan Zat Pengatur Tumbuh Komersial
Abstrak: Saninten (Castanopsis argentea (Blume) A.DC.) merupakan salah satu jenis pohon asli Indonesia yang bernilai tinggi dan memiliki buah yang bisa dikonsumsi sehingga kegiatan perbanyakan tanaman secara vegetatif perlu dilakukan. Tujuan penelitian ini adalah menguji pengaruh zat pengatur tumbuh (ZPT) komersial dan media tanam yang berbeda, serta interaksi keduanya terhadap pertumbuhan stek pucuk saninten. Penelitian ini menggunakan rancangan acak lengkap (RAL) dua faktor. Faktor pertama yaitu ZPT komersial dari Rootone-F, Rapid root, dan air kelapa. Faktor kedua yaitu media tanam berupa tanah, tanah arang sekam (1:1), dan pasir kompos (1:1). Pada penelitian ini persentase hidup stek sebesar 92.78% dan persentase berakar sebesar 40.56%. Hasil penelitian menunjukkan bahwa saninten dapat distek tanpa menggunakan ZPT komersial. Namun, interaksi ZPT dari air kelapa dengan media tanam pasir kompos memiliki respon jumlah akar primer dan sekunder tertinggi dan berbeda nyata dengan interaksi perlakuan lainnya.
Keyword: Castanopsis argentea, stek pucuk, zat pengatur tumbuh

Judul: Respon Pertumbuhan Tunas Saninten (Castanopsis argentea (Blume) A.DC.) terhadap Pemberian Zat Pengatur Tumbuh BAP dan IAA secara In Vitro
Abstrak: Saninten (Castanopsis argentea (Blume) A.DC.) adalah salah satu anggota famili Fagaceae yang merupakan penghasil kayu dan non kayu. Perbanyakan saninten secara in vitro belum pernah dilaporkan. Penelitian ini bertujuan untuk mengidentifikasi respon pertumbuhan tunas saninten terhadap pemberian zat pengatur tumbuh (ZPT) 6- benzylaminopurine (BAP) dan indole-3-acetic-acid (IAA) dengan konsentrasi yang berbeda secara in vitro pada media woody plant medium (WPM). Penelitian dilakukan dengan rancangan acak lengkap faktorial, dengan 2 faktor yaitu macam ZPT dan konsentrasi ZPT. Macam ZPT terdiri atas 2 taraf yaitu BAP dan IAA. Konsentrasi ZPT terdiri atas 3 taraf yaitu BAP dan IAA 0 mg/L, BAP 0.5 mg/L atau IAA 0.1 mg/L, dan BAP 1.0 mg/L atau IAA 0.2 mg/L. Peubah yang diamati ialah jumlah tunas, tinggi tunas, dan pertumbuhan kalus. Kombinasi ZPT BAP (0, 0.5, 1 mg/L) dengan IAA (0, 0.1, 0.2 mg/L) belum menghasilkan pertumbuhan tunas yang optimal. Media WPM dengan BAP 0.5 mg/L mampu menghasilkan persentase eksplan bertunas, jumlah tunas, dan pertambahan tinggi tunas terbaik. Media WPM dengan IAA konsentrasi 0.1 dan 0.2 mg/L menghasilkan pertumbuhan eksplan ke arah pembentukan kalus.
Keyword: 6-benzylaminopurine (BAP), Castanopsis argentea, indole-3-acetic-acid (IAA), woody plant medium (WPM)

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