Judul: Pengaruh zat pengatur tumbuh mixtalol dan pupuk daun bayfolan terhadap pertumbuhan setek teh (Camellia sinensis (L) O Kuntze)
Abstrak: Tujuan percobaan untuk mengetahui pengaruh zat peng- atur tumbuh Mixtalol dan pupuk daun Bayfolan terhadap pertumbuhan setek teh. Sebagai bahan percobaan digunakan setek teh berasal dari klon TRI 2025, zat pengatur tumbuh Mixtalol, pupuk daun Bayfolan dan media penanaman yang berupa lapisan atas dan lapisan bawah tanah Andosol Sukamantri...
Keyword: 

Judul: Pengaruh penyemprotan Hydrasil dan Paclobutrazol pada pohon induk dan posisi ruas terhadap pertumbuhan setek teh (Camellia sinensis (L.) O. Kuntze Klon CIN 143
Abstrak: Percobaan bertujuan untuk mengetahui pengaruh penyemprotan Hydrasil dan Paclobutrazol pada pohon induk dan posisi ruas terhadap pertumbuhan setek teh (Camellia sinensis (L) 0. Kuntze) klon Cin 143. Percobaan dilaksanakan mulai bulan Februari 1992 sampai dengan bulan Agustus 1992 di Kebun Percobaan Pusat Penelitian Perkebunan Gambung, Bandung, dengan jenis tanah Andosol pada ketinggian tempat 1 280 m di atas permukaan laut. Bahan yang digunakan yaitu pohon induk teh klon Cin 143 yang sudah berumur pangkas 4 bulan, Hydrasil, Paclobu- trazol, TSP, KCl, Tawas dan Agristick. Untuk penanaman setek digunakan polybag berukuran 25 cm x 12 cm, dengan media tumbuh tanah Andosol. Setek disusun di dalam sung- kup plastik dan diberi naungan kolektif. Rancangan yang digunakan yaitu Rancangan Acak Kelompok dengan pengaturan perlakuan secara faktorial, terdiri atas 3 faktor dan 3 ulangan. Faktor pertama konsentrasi Hydrasil: 0 ppm (Ho), 1 500 ppm (H₁) dan 3 000 ppm (H2). Faktor kedua konsentrasi Paclobutrazol: 0 ppm (Po) dan 200 ppm (P1). Faktor ketiga posisi ruas bahan setek: ruas dengan daun ke-3 (R0), ruas dengan daun ke-5 (R1) dan ruas dengan daun ke-7 (R2) dari ujung. Hydrasil dan Paclobutrazol disemprotkan pada pohon induk masing-masing pada umur 6 dan 4 minggu sebelum bahan seteknya diambil. Pengamatan dilakukan terhadap peubah saat terbentuknya tunas, jumlah tunas, tinggi tunas, jumlah daun, luas dauri, persentase setek hidup, persentase setek bertunas dan berakar, jumlah akar, panjang akar, bobot kering tunas dan bobot kering akar. Pemberian Hydrasil 1 500 ppm dan 3 000 ppm pada pohon induk dapat mempercepat saat terbentuknya tunas setek dan meningkatkan persentase setek hidup dibandingkan dengan tanpa Hydrasil. Walaupun tidak menunjukkan pengaruh seca- ra nyata, perlakuan Hydrasil 1 500 ppm dan 3 000 ppm cenderung meningkatkan tinggi tunas, persentase setek bertunas dan berakar, jumlah akar serta bobot kering tunas…dst
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