Judul: Pemanfaatan Beberapa Tipe Habitat oleh Burung Paruh Bengkok di Taman Nasional Manupeu Tanadaru Laiwangi Wanggameti
Abstrak: Taman Nasional Manupeu Tanadaru Laiwangi Wanggameti memiliki beragam tipe ekosistem yang mewakili tipe ekosistem utama Pulau Sumba. Burung paruh bengkok mendiami semua tipe habitat berkayu, namun terkadang dijumpai di padang rumput tanpa pohon. Tujuan dari penelitian ini yakni mengidentifikasi jenis dan persebaran burung paruh pada empat tipe habitat yaitu hutan primer, hutan sekunder, sabana, dan kebun, serta mengidentifikasi karakteristik habitat dan pemanfaatan habitat oleh burung paruh bengkok. Penelitian ini menemukan empat jenis burung paruh bengkok dengan tipe persebaran mengelompok dan seragam. Kerapatan tajuk tidak menjadi faktor utama keberadaan burung paruh bengkok. Burung paruh bengkok memanfaatkan habitat hutan primer dan hutan sekunder sebagai tempat bertengger dan bersarang, dan memanfaatkan habitat kebun sebagai tempat bertengger dan makan, Pada tipe habitat sabana tidak ditemukan adanya pemanfaatan habitat oleh burung paruh bengkok.
Keyword: Burung paruh bengkok, Pemanfaatan habitat, Taman Nasional Manupeu Tanadaru Laiwangi Wanggameti

Judul: Pemanfaatan Habitat oleh Burung Air di Taman Wisata Alam Angke Kapuk Jakarta
Abstrak: Taman Wisata Alam Angke Kapuk adalah salah satu kawasan lahan basah di Jakarta yang menjadi habitat burung air. Penelitian ini bertujuan mendeskripsikan habitat, mengidentifikasi jenis, dan menjelaskan pemanfaatan habitat serta faktor yang mempengaruhi pemanfaatan habitat oleh burung air di Taman Wisata Alam Angke Kapuk. Pengambilan data dilakukan dengan transek dan metode scan sampling. Pengamatan dilakukan pagi, siang, dan sore hari dengan 3 kali pengulangan masing-masing habitat. Habitat dibagi menjadi hutan mangrove, danau, muara sungai, dan rawa. Jumlah spesies yang ditemukan di habitat hutan mangrove 10 spesies, danau 13 spesies, muara sungai 14 spesies, dan rawa 7 spesies. Habitat danau dimanfaatkan untuk makan (48%). Habitat hutan mangrove dimanfaatkan untuk beristirahat (30%) dan waspada (16%). Habitat muara sungai dimanfaatkan untuk merawat tubuh (22%) dan berpindah (18%). Habitat rawa dimanfaatkan untuk istirahat (36%) dan menyerang (8%). Faktor yang mempengaruhi pemanfaatan habitat oleh burung air yaitu perburuan liar, aktivitas rekreasi, aktivitas nelayan, pengalihfungsian lahan, dan pencurian ikan.
Keyword: community common, threat to waterbirds, water bird activity

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