Judul: Pematahan Dormansi dan Respon Pertumbuhan Bibit Kaliandra (Calliandra calothyrsus Meissn.) terhadap Pemberian Pupuk dan Komposisi Media
Abstrak: Kaliandra (Calliandra calothyrsus) merupakan jenis tanaman yang dapat digunakan sebagai alternatif bahan baku energi yang dapat diperbarui dan mudah dimanfaatkan. Pertumbuhan awal tanaman kaliandra cenderung lambat akan tetapi pertumbuhan selanjutnya sangat cepat. Tujuan penelitian ini adalah mengetahui respon pertumbuhan bibit kaliandra (C. calothyrsus) terhadap penggunaan komposisi media dan pemberian berbagai jenis pupuk. Perlakuan benih yang direndam dengan air biasa selama 24 jam merupakan perlakuan yang memiliki daya berkecambah paling besar. Perlakuan perendaman benih kaliandra dengan suhu 980 C dapat menurunkan daya berkecambah benih. Pemberian pupuk NPK sebanyak 1 gram dan biourine sapi 20% pada media tanah+arang sekam mampu meningkatkan pertumbuhan tanaman kaliandra karena memberikan respon yang paling baik terhadap tinggi, diameter dan kekokohan bibit kaliandra. Pemberian biourine 20% mampu menggantikan penggunaan pupuk NPK. Media tanah+arang sekam (4:1) merupakan media yang paling baik digunakan untuk pertumbuhan bibit kaliandra.
Keyword: biourine, Calliandra calothyrsus, dormansi, pupuk NPK

Judul: Pengaruh Arang Sekam, Kompos dan Pupuk NPK terhadap Pertumbuhan Kaliandra Merah (Calliandra calothyrsus).
Abstrak: Kaliandra merah pada usia muda memiliki pertumbuhan yang lambat, sehingga perlu dilakukan pemupukan untuk meningkatkan pertumbuhan kaliandra merah di lapangan. Tujuan penelitian adalah mengetahui pengaruh arang sekam, kompos dan pupuk NPK terhadap pertumbuhan kaliandra di lapangan. Penelitian ini menggunakan Rancangan Acak Lengkap (RAL) faktorial 3x3x2 dengan 9 ulangan sehingga tanaman kaliandra merah yang digunakan sebanyak 162 bibit. Peubah yang diamati dalam penelitian ini adalah tinggi, diameter, berat basah daun dan cabang, berat kering daun dan cabang, panjang cabang, tinggi bebas cabang, jumlah cabang dan persen fase hidup. Hasil penelitian menunjukkan kombinasi perlakuan arang sekam, kompos dan pupuk NPK yang memberikan pengaruh nyata terhadap pertambahan diameter dan sangat nyata terhadap berat basah dan kering daun, serta berat basah dan kering cabang kaliandra merah. Perlakuan yang memberikan respon terbaik terhadap pertambahan diameter, berat basah dan kering daun, serta berat basah dan kering cabang kaliandra merah adalah A3B1C2, yaitu arang sekam 20%, tanpa kompos dan pupuk NPK 5 g.
Keyword: arang sekam, kaliandra merah, kompos, pertumbuhan, pupuk NPK

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