Judul: Pengaruh pemberian pupuk kandang dan urea terhadap pertumbuhan dan hasil padi gogo rancah pada tanah grumosol (vertisol) Ngawi Jawa Timur
Abstrak: Percobaan dilakukan di Kebun Percobaan Balittan Ngale, Ngawi, Jawa Timur, untuk mempelajari tentang pengaruh pupuk kandang dan urea serta interaksinya terhadap pertumbuhan dan hasil padi gogorancah. Pupuk kandang dari ternak kerbau pada taraf pemberian 0, 5, 10, 15, 20 ton/ha dan pupuk urea pada taraf pemberian 0, 60, 120 kg N/ha digunakan sebagai faktor perlakuan. Rancangan percobaan yang digunakan ialah Rancangan Acak Kelompok dalam Percobaan Faktorial. Setiap kenaikan taraf pemberian pupuk kandang dan urea dapat meningkatkan jumlah anakan dan tinggi tanaman dengan nyata. Pemberian pupuk kandang dan urea berpengaruh nyata terhadap kenaikan berat kering tanaman, Pengaruh pupuk kandang lebih menonjol terhadap bobot kering akar tanaman, sedangkan pengaruh pupuk urea lebih menonjol terhadap bobot kering bagian atas tanaman. Bobot kering bagian atas tanaman berkaitan erat dengan laju asimilasi bersih dan indek luas daun serta menunjukkan korelasi positip sangat nyata (r=0,9691**) dengan hasil gabah kering bersih.
Keyword: Oryza sativa;

Judul: Pengaruh pemupukan P dan pupuk kandang terhadap pertumbuhan, komponen hasil dan hasil padi gogo
Abstrak: Tujuan dari penelitian ini adalah untuk mengetahui pengaruh dari pupuk kandang dan pemupukan P serta interaksi keduanya terhadap pertumbuhan, komponen hasil dan hasil padi gogo. Digunakan Rancangan Petak Terbagi dengan empat ulangan, Pemberian pupuk kandang dengan taraf 0, 5 dan 10 ton per hektar merupakan petak utama, sedangkan anak petak terdiri dari pemberian pupuk P dengan taraf 0, 100, 200 dan 300 kg P2O5 per hektar. Pertumbuhan vegetatif diamati dengan mengukur tinggi tanaman dan menghitung jumlah anakan, sedangkan komponen hasil dan hasil diamati dengan mengukur panjang malai, jumlah malai, jumlah butir per malai, bobot 1000 butir, persentase gabah hampa dan hasil gabah kering. Ada kecenderungan bahwa peningkatan taraf pemberian pupuk kandang 10 ton per hektar menaikkan tinggi tanaman, jumlah anakan, panjang malai, jumlah malai, jumlah butir per malai serta menurunkan persentase gabah hampa. Sedangkan bobot 1000 butir dan hasil gabah kering sedikit menurun dibandingkan dengan pemberian pupuk kandang 5 ton per hektar.
Keyword: Oryza;, Rice production;, Rice response;, Plant growth;, Bogor Agricultural University;

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