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...
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Judul: Pengaruh zat pengatur tumbuh naa dan jumlah ruas terhadap pertumbuhan setek teh (Camellia sinensis (L.) O. Kuntze)
Abstrak: Percobaan ini bertujuan untuk mengetahui pengaruh jumlah ruas setek yang digunakan sebagai bahan asal dan konsentrasi NAA terhadap pertumbuhan setek teh. Percobaan ini dilaksanakan dari bulan Februari sampa i Juni 1993, di Puslit Teh dan Kina Gambung, Bandung, pada ketinggian 1 300 m di atas permukaan laut. Bahan setek yang digunakan berasal dari klon TRI 2025 yang diambil dari pohon induk yang berumur 4 bulan setelah pemangkasan. Zat Pengatur Tumbuh yang digunakan yaitu NAA (Naptaleneacetic amid) dan Rootone F. Rancangan percobaan yang digunakan yaitu Rancangan Acak Kelompok dengan 2 faktor yaitu jumlah ruas dan ZPT dengan masing-masing faktor terdiri atas 3 dan 6 taraf yaitu (Al) setek 1 ruas, (A2) setek 2 ruas, (A3) setek 3 ruas, (B1) Pasta Rootone F, (B2) 4000 ppm NAA, (B3) 3500 ppm NAA, (B4) 3000 ppm NAA, (B5) 2500 ppm NAA dan (B6) 2000 ppm NAA, sehingga ada 18 kombinasi perlakuan dan ma sing-masing perlakuan diulang 3 kali. Perlakuan diberikan pada saat penanaman dan pengamatan dilakukan 7 kali yaitu pada umur 2, 4, 6, 8, 12, 16 dan 20 minggu setelah perlakuan (MSP). Pengamatan dilakukan terhadap persentase setek hidup, persentase setek berakar, tinggi tanaman, bobot kering ta- naman, panjang akar, jumlah akar, diameter akar, bobot ke- ring akar dan perbandingan bobot kering tajuk dan akar. Dalam percobaan ini persentase setek hidup sampai pengamatan terakhir mencapai 95% dan keseluruhan setek telah berakar pada umur 20 MSP. Perlakuan jumlah ruas se- bagai bahan asal setek berpengaruh nyata terhadap diameter akar pada umur 6 dan 20 MSP, bobot kering akar pada umur 16 dan 20 MSP, jumlah akar pada umur 16 dan 20 MSP serta persentase setek berakar pada umur 6 MSP. Pengaruh ZPT dan interaksinya dengan perlakuan jumlah ruas berpengaruh nyata terhadap tinggi tanaman umur 2 dan 4 MSP dan bobot kering tanaman pada umur 4 MSP, setelah umur tersebut tidak berbeda nyata. Perlakuan tunggal ZPT hanya berpengaruh nyata terha- dap tinggi tanaman pada umur 2 MSP. Perlakuan tersebut tidak memberikan pengaruh nyata terhadap peubah perakaran. Nisbah bobot kering tajuk dan akar serta jumlah akar yang terbentuk tidak berbeda nyata sampai pengamatan ter- akhir (20 MSP)…
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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