Judul: Dormancy Breaking Methods of Ketapang Kencana (Terminalia mantaly) Seeds
Abstrak: Budidaya ketapang kencana secara generatif memiliki kendala karena adanya dormansi benih, sifat dormansi ini dapat dihilangkan melalui metode pematahan dormansi untuk memperbaiki viabilitas dan vigor benih. Penelitian bertujuan menganalisis metode pematahan dormansi yang tepat untuk benih ketapang kencana. Perlakuan pematahan dormansi yang diterapkan adalah: (1) kontrol, (2) benih dipotong, (3) benih diampelas, (4) benih direndam dalam larutan H2SO4, (5) benih direndam air panas, (6) benih direndam air 12 jam, (7) benih direndam air 72 jam. Hasil penelitian menunjukkan terdapat tiga perlakuan yang tepat yaitu pemotongan, pengampelasan dan perendaman benih dalam air selama 12 jam. Perlakuan pematahan dormansi berpengaruh nyata terhadap indeks perkecambahan, pertumbuhan kecambah normal (berat kering, tinggi kecambah, panjang akar) dan awal mula tumbuh kecambah. Benih berukuran besar memiliki indeks perkecambahan, potensi tumbuh maksimum, daya berkecambah, vigor benih dan berat kering kecambah lebih tinggi dibandingkan dengan benih yang berukuran lebih kecil., The generative cultivation of Ketapang Kencana has problems due to seed dormancy, this dormancy can be removed through the dormancy breaking method to improve seed viability and vigor. This study aims to analyze the appropriate dormancy breaking methods for Ketapang Kencana. The dormancy breaking treatments applied were: (1) control, (2) seeds cut, (3) seeds sanded, (4) seeds soaked in H2SO4 solution, (5) seeds soaked in hot water, (6) seeds soaked in water 12 hours, (7) seeds soaked in water 72 hours. The results showed that there were three appropriate treatments, cutting near the growing point, sanding, and soaking the seeds in water for 12 hours. The treatment of breaking dormancy had a significant effect on germination index, normal germination growth (dry weight, sprout height, root length), and early germination. Seed size affects germination and dry weight of normal germination. Large seeds had a higher germination index, maximum growth potential, germination capacity, seed vigor and dry weight of germination compared to smaller seeds.
Keyword: seed dormancy, seed germination, seed size, seed vigor, Terminalia mantaly

Judul: Dormancy Breaking Methods of Ketapang Kencana (Terminalia mantaly) Seeds
Abstrak: Budidaya ketapang kencana secara generatif memiliki kendala karena adanya dormansi benih, sifat dormansi ini dapat dihilangkan melalui metode pematahan dormansi untuk memperbaiki viabilitas dan vigor benih. Penelitian bertujuan menganalisis metode pematahan dormansi yang tepat untuk benih ketapang kencana. Perlakuan pematahan dormansi yang diterapkan adalah: (1) kontrol, (2) benih dipotong, (3) benih diampelas, (4) benih direndam dalam larutan H2SO4, (5) benih direndam air panas, (6) benih direndam air 12 jam, (7) benih direndam air 72 jam. Hasil penelitian menunjukkan terdapat tiga perlakuan yang tepat yaitu pemotongan, pengampelasan dan perendaman benih dalam air selama 12 jam. Perlakuan pematahan dormansi berpengaruh nyata terhadap indeks perkecambahan, pertumbuhan kecambah normal (berat kering, tinggi kecambah, panjang akar) dan awal mula tumbuh kecambah. Benih berukuran besar memiliki indeks perkecambahan, potensi tumbuh maksimum, daya berkecambah, vigor benih dan berat kering kecambah lebih tinggi dibandingkan dengan benih yang berukuran lebih kecil., The generative cultivation of Ketapang Kencana has problems due to seed dormancy, this dormancy can be removed through the dormancy breaking method to improve seed viability and vigor. This study aims to analyze the appropriate dormancy breaking methods for Ketapang Kencana. The dormancy breaking treatments applied were: (1) control, (2) seeds cut, (3) seeds sanded, (4) seeds soaked in H2SO4 solution, (5) seeds soaked in hot water, (6) seeds soaked in water 12 hours, (7) seeds soaked in water 72 hours. The results showed that there were three appropriate treatments, cutting near the growing point, sanding, and soaking the seeds in water for 12 hours. The treatment of breaking dormancy had a significant effect on germination index, normal germination growth (dry weight, sprout height, root length), and early germination. Seed size affects germination and dry weight of normal germination. Large seeds had a higher germination index, maximum growth potential, germination capacity, seed vigor and dry weight of germination compared to smaller seeds.
Keyword: seed dormancy, seed germination, seed size, seed vigor, Terminalia mantaly

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