Judul: Pengaruh pemberian mineral zeolit dan kapur dolomit terhadap perubahan beberapa sifat kimia tanah, pertumbuhan vegetatif serta serapan Na, K, Ca dan Mg tanaman kedelai (Glycine max L Merr) pada podsolik coklat kekuningan Cibarusa
Abstrak: Percobaan bertujuan untuk melihat pengaruh pemberian mineral zeolit dan kapur dolomit terhadap pertumbuhan dan serapan unsur natrium (Na), kalium (K), kalsium (Ca) dan magnesium (Mg) tanaman kedelai; serta beberapa sifat ki- mia tanah: natrium, kalium, kalsium, dan magnesium ter- sedia, aluminium (Al) dapat dipertukarkan, kapasitas tu- kar kation (KTK), dan pH tanah. Serangkaian percobaan pot di rumah kaca dan analisis kimia di laboratorium telah dilakukan. Rancangan percobaan yang digunakan adalah Rancangan Faktorial dalam Rancangan Acak Lengkap dengan tiga ulangan. Sebagai perlakuan digunakan mineral zeolit dengan dosis 0.0, 2.0, 4.0, dan 6.0 ton/ha; dan kapur dolomit dengan dosis 0.0, 2.0, 3.0, dan 4.0 ton/ha. Tanaman yang diuji adalah kedelai (Glycine max L Merr) varietas Orba. Pupuk dasar yang digunakan adalah: Urea, TSP, dan KCl dengan dosis 75 kg N/ha, 100 kg K20/ha, dan 150 kg P205/ha. Pemberian mineral zeolit berpengaruh nyata terhadap berat kering tanaman; sedangkan terhadap jumlah daun Berapan unsur natrium, kalium, kalsium, dan magnesium tanaman, berpengaruh sangat nyata; tetapi tidak berpengaruh nyata terhadap tinggi tanaman. Pemberian kapur dolomit berpengaruh sangat nyata terhadap tinggi tanaman, jumlah daun, berat kering tanaman, serapan unsur natrium, kalium, kalsium, dan magnesium tanaman. Pemberian mineral zeolit berpengaruh sangat nyata terhadap ketersediaan kalium dan magnesium tanah, aluminium dapat dipertukarkan, kapasitas tukar kation, dan pH tanah; tetapi tidak berpengaruh nyata terhadap natrium dan kalsium tersedia tanah. Pemberian kapur dolomit ber- pengaruh sangat nyata terhadap kalsium dan magnesium ter- sedia, aluminium dapat dipertukarkan, kapasitas tukar kation, dan pH tanah; tetapi tidak berpengaruh nyata terhadap natrium dan kalium tersedia tanah…dst
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Judul: Pengaruh pemberian mineral zeolit dan lahar galunggung terhadap pertumbuhan dan serapan P. K. Na, Ca, Mg tanaman jagung pada podsolik merah kuning jasinga
Abstrak: Percobaan ini bertujuan untuk mengetahui dan mempelajari pengaruh pemberian mineral zeolit dan lahar Galunggung terhadap pertumbuhan dan serapan unsur fosfor (P), kalium (K), natrium (Na), kalsium (Ca) dan magnesium (Mg) tanaman jagung; serta beberapa sifat kimia tanah: kapasitas tukar kation (KTK) tanah, pH tanah, fosfor tersedia, aluminium, kalium, natrium, kalsium dan magnesium dapat dipertukarkan. Percobaan dilaksanakan di rumah kaca dengan menggunakan pot-pot percobaan. Rancangan percobaan yang digunakan adalah Rancangan Faktorial dalam Rancangan Acak Lengkap dengan tiga ulangan. Perlakuan yang digunakan adalah te- pung mineral zeolit dengan dosis: 0, 4, 8 dan 12 ton/ha; dan tepung lahar Galunggung dengan dosis: 0, 15 dan 30 ton/ha. Tanaman yang diuji adalah jagung (Zea mays L.) varietas Arjuna. Pupuk dasar yang digunakan adalah: Urea, TSP dan KCl dengan dosis masing-masing 100 ppm nitrogen (N), 100 ppm fosfor (P) dan 100 ppm kalium (K). Pemberian mineral zeolit berpengaruh sangat nyata terhadap serapan unsur K tanaman, nyata meningkatkan serapan unsur Na dan Ca tanaman; tetapi tidak berpengaruh nyata terhadap tinggi tanaman, lingkar batang, berat kering ta- naman (bagian atas tanaman dan akar), serapan unsur P dan Mg tanaman. Pemberian mineral zeolit sangat nyata mening- katkan pH tanah, K-dd, Na-dd dan Ca-dd tanah, berpengaruh nyata terhadap P-tersedia tanah, tetapi KTK tanah, Al-dd dan Mg-dd tanah tidak menunjukkan respon yang nyata…dst
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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