Judul: Pengaruh berbagai teraf naungan pohon kelapa dan nitrogen terhadap pertumbuhan dan produksi rumput paricum maximum C. V. Riversdale
Abstrak: Penelitian ini bertujuan untuk mengetahui pengaruh beberapa taraf naungan pohon kelapa dan nitrogen terhadap produksi dan pertumbuhan serta ketenggangan rumput Panicum maximum cv .Riversdale. Percobaan dilaksanakan di Kebun Percobaan Balai Penelitian Kelapa Manado Kima Atas. Percobaan disusun dalam Rancangan Petak Terbagi. Berdasarkan rancangan ini taraf naungan 0,20 dan 73 % PAR (Ph otosyntetically Active Radiation) diletakkan pada petak utama dengan taraf nitrogen 0,100 dan 200 kg ha-1 pada anak petak. Seluruh perlakuan diulang tiga kali. Hasil analisis keragaman menunjukkan perbedaan yang nyata setelah diuji lanjut dengan uji BNJ pada taraf 5 %. Hasil percobaan menunjukkan, bahwa bobot kering tanaman tertinggi mencapai 409,40 gr/m 2 pada pemupukkan nitrogen 200 kg ha-1 dan naungan O % atau sinaran penuh. Bobot kering akar tertinggi yang dicapai 23,91 gr/3 rumpun akar pada O % dan nitrogen 200 kg ha-1. Interaksi taraf naungan dan nitrogen ditemukan baik pada bobot kering tanaman maupun pada bobot kering akar. Kandungan protein kasar tertinggi dicapai pada taraf naungan 73 % maupun pada taraf nitrogen tertinggi (200 kg ha-1) masing-masing sebesar 14,93 dan 14,35 % dari bahan kering. Pengaruh interaksi antara perlakuan terhadap kandungan protein kasar tanaman tidak nyata. Proporsi bobot kering daun dan batang tertinggi kg ha-1 dicapai pada taraf naungan O % dan nitrogen 200 rnasing-masing sebesar 239,30 dan 170,00 gr m-2. Interaksi taraf naungan dan nitrogen ditemukan baik pada bobot kering daun maupun pada bobot kering batang. ...
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Judul: Produksi, kualitas nutrisi dan kapasitas tampung ternak kambing dari rumput Panicum maximum cv. Riversdale pada tingkat naungan dan pemupukan nitrogen yang berbeda
Abstrak: Sehubungan dengan hal tersebut di atas, maka penelitian ini dilakukan dengan tujuan untuk mengetahui taraf pemupukan nitrogen yang tepat dari rumput maximum CV. Riversdele pada lahan di bawah pohon Panicum kelapa dan lahan terbuka ditinjau dari produksi, kualitas nutrisi dan kapasitas tampung ternak kambing. Penelitian ini dilakukan di kebun penelitian Balai Tanaman Kelapa Manado, Sulawesi Utara. Pelaksanaannya dimulai bulan Juli 1990 sampai dengan Maret 1991. Percobaan aspek agronomi dilaksanakan di bawah pohon kelapa dan pada lahan terbuka dengan menggunakan rancangan split-plot dalam acak kelompok. Faktor pertama adalah naungan yakni di bawah naungan pohon kelapa (A) dan tempat terbuka (A2) sebagai petak utama. Faktor kedua adalah pemupukan nitrogen terdiri dari empat tingkat: B (0) B₂ (75); B3 (150) dan B4 (300) N kg ha-1 sebagai anak petak. dst ...
Keyword: Panicum maximum, Sheep breeding;

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