Judul: Keanekaragaman Kupu-Kupu Berdasarkan Karakteristik Lingkungan di Sekitar Danau Sentani Jayapura
Abstrak: Keanekaragaman kupu-kupu dipengaruhi oleh karakteristik lingkungan. Penelitian ini bertujuan untuk mengkaji keanekaragaman jenis kupu-kupu berdasarkan karakteristik lingkungan di Danau Sentani Jayapura. Metode yang digunakan yaitu transek point count, eksplorasi, dan jebakan (food trap). Jumlah jenis kupu-kupu yang ditemukan pada empat lokasi berbeda yaitu ladang, permukiman, riparian, dan hutan sebanyak 52 jenis. Famili dengan perjumpaan terbanyak pada lokasi penelitian yaitu Nymphalidae. Kekayaan jenis kupu-kupu tertinggi berada pada lokasi hutan di pagi hari, keanekaragaman jenis tertinggi terdapat pada lokasi riparian, kemerataan jenis tertinggi pada siang hari di hutan, dominansi jenis tertinggi berada pada ladang di siang hari. Ladang dan riparian memiliki tingkat kesamaan komunitas tertinggi. Riparian memiliki potensi keanekaragaman jenis kupu-kupu yang tinggi dikarenakan faktor lingkungan yang mendukung, seperti tumbuhan pakan, kelembaban dan Leaf Area Index. Strategi konservasi kupu-kupu yang dapat dikembangkan antara lain Butterfly Watching, budidaya tumbuhan pakan inang, pembuatan papan interpretasi, dan awetan kupukupu.
Keyword: butterflies, diversity, environmental, Sentani Lake

Judul: Keanekaragaman Kupu-Kupu di Kawasan Sentul City Jawa Barat.
Abstrak: Sentul City yang dibangun secara berkelanjutan dengan konsep eco-city menjadi habitat keanekaragaman hayati salah satunya kupu-kupu. Tujuan penelitian ini yaitu mengkaji keanekaragaman, kemerataan dan kesamaan penggunaan habitat kupu-kupu dan menganalisis kaitan faktor biotik dan abiotik dengan keberadaan kupu-kupu. Penelitian dilakukan pada bulan Juli hingga Agustus 2015 menggunakan metode transek garis dan eksplorasi. Tipe habitat yang diteliti yaitu Danau Teratai, Taman Budaya, Cluster Bali dan Jalan Siliwangi memiliki tingkat keanekaragaman sedang dengan kemerataan jenis kategori merata. Kekayaan jenis pada tipe habitat Danau Teratai tergolong tinggi sedangkan tipe habitat Taman Budaya, Cluster Bali dan Jalan Siliwangi tergolong sedang. Keanekaragaman kupu-kupu dipengaruhi oleh ketersediaan tanaman pakan larva dan pakan kupu-kupu, habitat yang terbuka, suhu udara optimal (28°C-34°C), sumber air bersih yang tersedia sepanjang tahun, gangguan manusia yang tergolong sedang. Keanekaragaman jenis tipe habitat Danau teratai merupakan yang tertinggi diantara tipe habitat lain dikarenakan faktor biotik dan abiotik yang sesuai dengan kebutuhan kupu-kupu
Keyword: abiotik, biotik, keanekaragaman, kupu-kupu, Sentul city

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