Judul: Pengaruh aplikasi berbagai konsentrasi paklobutrazol dan media tanam terhadap pembungaan bugenvil, Bougainvillea spectabillis di area berpolusi udara
Abstrak: Penelitian ini dilakukan untuk mengetahui komposisi media dan mencari konsentrasi paklobutrazol yang tepat dan interaksinya dalam menstimulasi pembungaan bugenvil (Bougainvillea spectabillis) di area berpolusi udara. Penelitian ini dilaksanakan di median jalan tol jagorawi KM 43, Bogor mulai April sampai denagn Nopember 2005. Penelitian menggunakan rancangan acak kelompok dua faktor. Faktor pertama adalah media tanam yakni campuran tanah: pupuk kandang = 1:1 (v/v), tanah pupuk kandang pasir = 1:1:3 (v/v), dan tanah pupuk kandang: sirtu =1:1:3 (v/v). Faktor kedua yaitu konsentrasi paklobutrazol yang terdiri atas 0 ppm, 250 ppm, 500 ppm, dan 700 ppm. Percobaan terdiri atas 12 kombinasi perlakuan yang diulang tiga kali atau disusun dalam tiga blok. Tiap satuan percobaan terdiri dari satu tanaman, sehingga jumlah tanaman seluruhnya adalah 36 tanaman. Pada penelitian ini bahan tanaman yang digunakan adalah stek tanaman bugenvil dengan panjang 30 cm dan diameter batang 1.5 cm. Pengakaran stek menggunakan media tanah pupuk kandang sekam = 1:1:1 (v/v). Setelah stek bugenvil berakar dilakukan repotting ke media sesuai dengan perlakuan. Aplikasi paklobutrazol dilaksanakan dua kali yaitu pada 4 dan 8 minggu setelah tanam. Pengamatan dilakukan setiap minggu sekali meliputi pertambahan tinggi tanaman, pertambahan cabang primer, pertambahan cabang sekunder, pertambahan cabang tersier, jumlah bunga cluster, jumlah bunga non cluster, jumlah bunga total, jumlah klorofil, dan warna bunga. ...
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Judul: Respon tanaman bougainvillea spectabilis, hibiscus rosa-sinensis dan ivora jaananica pada pachobutrazol dan toleransinya terhadap polutan udara etilen
Abstrak: Tujuan penelitian adalah untuk mengetahui tingkat toleransi tanaman Bougainvillea spectabilis, Hibiscus rosa-sinensis dan Jxora javanica yang dibudidayakan dengan menggunakan paclobutrazol, terhadap polutan udara etilen. Percobaan dilakukan di lapang dengan menggunakan sungkup plastik. Rancangan yang digunakan adalah rancangan petak terbagi (split plot) dengan faktor utama etilen dengan 5 taraf konsentrasi yaitu 0 ppm, 0.15 ppm, 0.30 ppm, 0.45 ppm, 0. 60 ppm dan faktor kedua paclobutrazol dengan 4 taraf konsentrasi yaitu 0 ppm, 250 ppm, 500 ppm dan 750 ppm. Tingkat toleransi tanaman terhadap polutan etilen meningkat dengan penggunaan paclobutrazol melalui media tanam. Pada konsentrasi tertentu paclo dan etilen dapat berpengaruh baik pada tanaman. Dari ketiga species tanaman Bougainvillea spectabilis memberikan respon terbaik pada paclobutrazol dan toleransi terhadap pol utan udara etilen.
Keyword: Paclobutanzol

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