Judul: Kajian Pengaruh Jarak Tanam Bambu Betung (Dentirocalamlls asper (Schultes. f) Backer ex Heyne) terhadap Pertumbuhan dan Produksi Tanaman Obat Katuk (Sauropus androgynus (L.) Merr.), Kencur (Kaemferia galanga L.) dan Raja Gowah (Alpinia malaccensis Rose.)
Abstrak: Bambu betung (D, asper) termasuk salah satu jenis bambu yang memiliki potensi untuk dikembangkan secaraa ekonomis karena mempunyai banyak manfaat. Kegunaan jenis ini antara lain buluhnya dapat digunakan sebagai bahan bangunan, dan rebungnya dapat dijadikan sebagai bahan makanan, Namun dalam pembudidayaaan bambu secara monokultur menyisakan ruang kosong diantara rumpun-rumpun bmnbu, sehingga pemanfaatan lahan menjadi tidak optimaL Penanaman tanaman obat diantaraa rumpun-rumpun bambu meerupakan salah satu altematif yang dapat diterapkan
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Judul: Pengaruh Jarak Tanam Bambu dan Tanaman Scla Tumbuhan Obat terhadap Pertumbuhau dan Produktivitas Rebung Bambu Betung (Dendrocalamus asper (Sculttes F.) Backer ex. Heyne).
Abstrak: Bambu Betung (Dendrocalamus asper) merupakan tumbuban endemik, jangkauan tempat tumbulmya luas dan memiliki banyak kegunaan seperti baban bangunan, perabot rumah tangga, rebung dan lain-lain. Jenis ini sudab banyak dibudidayakan oleh masyarakat. Namun budidaya yang dilakukan secara monokultur mengakibatkan adanya ruang kosong diantara tanaman bambu tersebut, sehingga penggunaan lahannya menjadi tidak optimal. Penanaman tumbuban obat diantara tanaman bambu tersebut merupakan salab satu altematif yang dapat diterapkan dalam rangka mengoptimalkan penggunaan labarmya. Penelitian ini bertujuan untuk mengetahui pengarub jarak tanam bambu dan penanaman tanaman sela tumbuhan obat terhadap pertumbuban dan preduktivitas rebung bambu betung. Tahapan penelitian meliputi : persiapan dan pengolahan laban, pembibitan tumbuban obat, penanaman tumbuban obat, pemeliharaan tanaman dan pengamatan. Tumbuban obat yang ditanam di areal tersebut terdiri dari tujub jenis meliputi : kumis kucing, temu lawak, temu item, katuk, kencur, raja gowah dan lengkuas. Peubah yang diamati dalam penelitian ini meliputi : pertambaban tinggi rebung, pertambahan diameter rebung, jumlab rebung, dan interaksi masyarakat dengan tanaman bambu. Pengamatan tinggi dan diameter rebung dilakukan setiap hari selama 16 hari pengukuran, sedangkan pengamatan jumlab rebung dilakukan'selama lima bulan dan interaksi masyarakat dengan tanaman bambu dilakukan selama sembilan bulan. Data yang dipereleh kemudian dianalisa secara deskriptif.
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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