Judul: Pengaruh PEmberian Tiga Jenis Ternak Dikombinasikan dengan Fosfor dan Unsur Mikro terhadap Anasir-anasir Kemasan Tanah dan Ketersediaan Fosfor pada Tanah Podzolik dari Tiga tempat di Jasinga yang Ditanami Rumput Sudan (Sorghum sudanense P Stapf)
Abstrak: Terak baja merupakan bahan pupuk yang dapat dan mampu memperbaiki sistem tanah dan menaikan produksi tanaman. Tetapi penggunaannya di Indonesia belum meluas dan penelitian yang dilakukan pada tanah podzolik masih sangat sedikit, sedangkan potensi pengembangan terak baja mempunyai masa depan yang baik. Oleh sebab itu penelitian ini bertujuan untuk mengungkapkan pengaruh pemberian tiga jenis terak terhadap anasir-anasir kemasaman tanah dan ketersediaan fosfor pada podzolik yang memiliki kadar aluminium yang berbeda dan PH H2O yang relatif sama.
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Judul: Pengaruh pemberrian Tiga Jenis Terak Dikombinasikan Dengan Fosfor Dan Unsur Mikro Pada tanah Podzolik Dari tiga Tempat Di jasinga Terhadap Pertumbuhan Rumput Sudan(Sorghum sudanense P Stapf) tanpa Kapur Dan kedelai (Glycine nax (L) Merr) Yang Di kapur
Abstrak: Tujuan penelitian ini ialah untuk mengetahui pengaruh pemanfaatan limbah industri berupa terak terhadap pertumbuhan rumput sudan, dan tanaman kedelai. Rumput sudan dipilih sebagai tanaman indikator karena rumput sudan mempunyai persamaan dengan tebu dalam hal penyerapan unsur hara, dan dapat dipanen dalam waktu yang relatif singkat. Pada percobaan ini terak sebagai sumber silikat yang digunakan ada tiga yaitu kalsium silikat Hawai, terak Jepang, dan terak Cilegon dengan dosis masing-masing 2 ton/ha. Percobaan dilakukan di Rumah Kaca. Parameter pertumbuhan tanaman yang diamati adalah: tinggi, bobot basah bagian atas, bobot basah akar, bobot kering bagian atas, dan bobot kering akar. Untuk tanaman kedelai selain parameter diatas, diamati pula jumlah cabang dan jumlah bintil. Pemberian terak menaikkan tinggi, bobot basah bagian atas, bobot basah akar, bobot kering bagian atas, dan bobot kering akar rumput sudan terutama pada tanah S₁ dan S2. Kenaikkan tertinggi dicapai oleh kalsium silikat Hawai.
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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