Judul: Studi Pengaruh berbagai jenis media terhadap pertumbuhan semai Paraserianthes falcataria (L) Nielsen
Abstrak: Penelitian ini bertujuan untuk memperoleh informasi mengenai jenis media mana yang terbaik antara serbuk gergaji sungkai (Peronema canescens), serbuk gergaji sengon (Paraserianthes falcataria), serbuk gergaji jati (Tectona grandis), alang-alang (Imperata cylindrica), dan tanah latosol sebagai kontrol serta pengaruh pemberian kotoran ayam dan Trichoderma viride terhadap pertumbuhan semai P. falcataria. Rancangan percobaan yang digunakan dalam penelitian adalah rancangan acak lengkap dengan pola faktorial ini 5 x 3 dengan ulangan sebanyak 5 kali. Hasil penelitian menunjukkan bahwa penggunaan serbuk media gergaji sungkai dapat meningkatkan pertambahan tinggi, diameter, dan berat kering total dari semai P. falcataria. ...
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Judul: Pengaruh pemberian ekstrak kulit jagung (Zea mays L.) dan trichoderma viridae pada berbagai media terhadap pertumbuhan semai sengon (Paraserianthes falcataria (L.) Nielsen)
Abstrak: Kualitas bibit dipengaruhi oleh media tanam, tanah sampai saat ini masih dipergunakan sebagai media tanam walaupun masih belum dipertimbangkan tingkat kesuburannya. Penggunaan serasah sebagai penambahan bahan organik pada media tanam perlu melewati proses pengomposan, agar hara yang terkandung dalam serasah dapat terurai dan menjadi tersedia bagi tanaman. Tujuan dari penelitian ini adalah untuk mengetahui pengaruh pemberian ekstrak kulit jagung dan cendawan T. viride terhadap kualitas kompos serasah kulit jagung yang dijadikan sebagai media tanam P. falcataria dan terhadap pertumbuhan semai. Ekstrak kulit jagung diperoleh dengan merebus 50 gram kulit jagung dalam 200 ml air, sampai air hasil rebusan menjadi 100 ml. T.viride diperoleh dengan mencampurkan bibit T.viride, dedak dan serbuk gergaji kayu sengon dengan perbandingan 1:1:2. Selanjutnya ekstrak dan cendawan ini dicampurkan dalam media yang akan dikomposkan dengan perlakuan berbeda, yaitu media dengan ekstrak cair, media dengan ekstrak padat, media dengan ekstrak campuran padat dan cair, dan media dengan T.viride. Media kontrol diberi perlakuan dengan air biasa. Rancangan percobaan yang digunakan adalah rancangan faktorial dengan pola rancangan acak lengkap (jenis ektrak dan T.viride sebagai perlakuan A sedangkan jenis media sebagai perlakuan B). Peubah-peubah yang diamati adalah tinggi, diameter, berat kering total (bkt), nisbah pucuk akar (npa), dan indeks mutu bibit (imb). Pada tahap akhir pengomposan dilakukan analisa media tanam untuk melihat kandungan unsur C organik, total N, P, Ca, Mg dan K.
Keyword: Plant growth regulators

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