Judul: Pengaruh pemberian fosfor, boron dan seng terhadap pertumbuhan vegetatif dan kadar N,P,K, dan Zn tanaman jagung ( Zea mays L ) pada podsolik merah kuning jasinga
Abstrak: Podsolik Merah Kuning merupakan jenis tanah yang mempunyai penyebaran yang sangat luas di Indonesia dan saat ini merupakan salah satu alternatif dari lahan marginal yang masih mungkin diusahakan untuk ekstensifikasi pertanian. Tanah ini bereaksi masam, miskin unsur hara. Keracunan Al dan kekurangan hara P dapat menjadi faktor pembatas yang utama bagi pertumbuhan tanaman jagung. Pemakaian jenis unggul dan pupuk makro beranalisis tinggi dan menurunnya kadar unsur mikro dalam pupuk serta penanaman yang intensif menyebabkan kekurangan unsur mikro. Penelitian ini bertujuan untuk mengetahui pengaruh pemberian fosfor, boron, dan seng terhadap pertumbuhan vegetatif dan kadar N, P, K, dan Zn tanaman jagung pada Podsolik Merah Kuning Jasinga. Percobaan dilakukan di rumah kaca Biotrop dan laboratorium Jurusan Ilmu Tanah, Fakultas Pertanian, IPB, dengan rancangan perlakuan berbentuk faktorial 3 x 3 x 2 yang di- tempatkan dalam Rancangan Acak Lengkap. Tiga taraf fosfor: 0, 200, 400 ppm P, tiga taraf boron: 0, 0.5, dan 1.0 ppm B, dan dua taraf seng: 0, dan 10.2 ppm Zn, masing-masing diulang tiga kali. Jagung yang dipakai adalah varietas Harapan-6.
Keyword: 

Judul: Pengaruh pemberian kapur, fosfor dan seng terhadap pertumbuhan dan kandungan P, Zn tanaman kedelai ( Glycine max ( L. ) Merr. ) pada podsolik merah kuning Jasinga
Abstrak: Sebagian besar areal pertanian di Indonesia adalah Podsolik Merah Kuning. Telah lama diketahui bahwa faktor pembatas utama pertumbuhan tanaman pada tanah ini adalah kemasaman yang tinggi dan kurangnya kandungan dan ketersediaan unsur hara. Penelitian mengenai pengaruh pemberian unsur hara makro N, P, dan K terhadap pertumbuhan tanaman telah banyak dilakukan pada tanah jenis ini, sedang penelitian mengenai unsur hara mikro terutama seng jarang dilaporkan. Penelitian ini bertujuan untuk mengetahui pengaruh pemberian kapur, fosfor dan seng terhadap pertumbuhan dan kandungan P, Zn tanaman kedelai pada Podsolik Merah Kuning Jasinga. Percobaan dilakukan di rumah kaca dan laboratorium Jurusan Ilmu-ilmu Tanah, Fakultas Pertanian, IPB, dengan rancangan perlakuan berbentuk faktorial 2 x 3 x 3 yang di- tempatkan dalam Rancangan Acak Lengkap. Dua taraf kapur: O dan 14.1 ton/ha, tiga taraf fosfor: 0, 200, dan 400 ppm P, dan tiga taraf seng: 0, 10.2, dan 20.4 ppm Zn, masing- masing diulang tiga kali. Kedelai yang dipakai adalah varietas Galunggung.
Keyword: 

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