Judul: Populasi dan Keanekaragaman Fauna Tanah di Perkebunan Kelapa Sawit Rakyat Kecamatan Bajubang Provinsi Jambi
Abstrak: Fauna tanah merupakan salah satu pembentuk ekosistem tanah yang berperan dalam proses dekomposisi, penyediaan unsur hara, pengendalian populasi organisme patogen dan mencampur bahan organik dengan tanah. Tujuan penelitian ini adalah mengetahui populasi dan keanekaragaman fauna tanah di area perkebunan kelapa sawit. Pengambilan sampel tanah dilakukan di area perkebunan kelapa sawit rakyat Kecamatan Bajubang Provinsi Jambi. Hasil penelitian menunjukan bahwa terdapat 24 jenis ordo fauna tanah yang berada di area perkebunan kelapa sawit tersebut. Dari dua area yang telah diidentifikasi yakni antara area piringan dengan gawangan mati menunjukkan bahwa kepadatan populasi fauna tanah didominasi di area gawangan mati. Hal ini disebabkan pada area gawangan mati mengandung bahan organik tinggi yang berfungsi sebagai sumber makanan bagi fauna tanah. Kepadatan populasi fauna tanah di lapisan tanah lebih tinggi dibandingkan di lapisan serasah. Habitat merupakan salah satu faktor yang mempengaruhi jenis dan kepadatan populasi fauna tanah. Fauna tanah yang mendominasi di setiap areanya ialah Acari dan Collembola. Acari dan Collembola mempunyai peran dalam proses dekomposisi bahan organik. Hasil pengamatan juga menunjukkan bahwa total populasi mesofauna lebih tinggi daripada makrofauna tanah. Sifat kimia tanah seperti C-organik, N-total, pH dan kadar air berkorelasi positif terhadap fauna tanah.
Keyword: Acari, area piringan, Collembola, gawangan mati

Judul: Populasi Dan Keanekaragaman Fauna Tanah Di Perkebunan Kelapa Sawit Rakyat Kecamatan Bajubang Provinsi Jambi
Abstrak: Fauna tanah merupakan salah satu pembentuk ekosistem tanah yang berperan dalam proses dekomposisi, penyediaan unsur hara, pengendalian populasi organisme patogen dan mencampur bahan organik dengan tanah. Tujuan penelitian ini adalah mengetahui populasi dan keanekaragaman fauna tanah di area perkebunan kelapa sawit. Pengambilan sampel tanah dilakukan di area perkebunan kelapa sawit rakyat Kecamatan Bajubang Provinsi Jambi. Hasil penelitian menunjukan bahwa terdapat 24 jenis ordo fauna tanah yang berada di area perkebunan kelapa sawit tersebut. Dari dua area yang telah diidentifikasi yakni antara area piringan dengan gawangan mati menunjukkan bahwa kepadatan populasi fauna tanah didominasi di area gawangan mati. Hal ini disebabkan pada area gawangan mati mengandung bahan organik tinggi yang berfungsi sebagai sumber makanan bagi fauna tanah. Kepadatan populasi fauna tanah di lapisan tanah lebih tinggi dibandingkan di lapisan serasah. Habitat merupakan salah satu faktor yang mempengaruhi jenis dan kepadatan populasi fauna tanah. Fauna tanah yang mendominasi di setiap areanya ialah Acari dan Collembola. Acari dan Collembola mempunyai peran dalam proses dekomposisi bahan organik. Hasil pengamatan juga menunjukkan bahwa total populasi mesofauna lebih tinggi daripada makrofauna tanah. Sifat kimia tanah seperti C-organik, N-total, pH dan kadar air berkorelasi positif terhadap fauna tanah.
Keyword: Acari, area piringan, Collembola, gawangan mati

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