Judul: Analisis sistem perairan kota baru Bandar Kemayoran untuk pengelolaan lingkungan perairan dengan Burung Pecuk Hitam(Phalaerocorax sulcirostris Brandt) sebagai indikator
Abstrak: Taman Burung Kota Bara Bandar Kemayoran (KBBK) yang terletak. di areal bekas bandar udara Kemayoran me1upak.an salah satu dari sedikit kawasan lahan basah alami yang tersisa di Jakarta. Kawasan taman burung ini memiliki daerah berair berupa hutan payau alami (6,3 ha), dan waduk buatan (15 ha). Pecuk hitam (Phalacrocorax sulcirostris) merupak.an salah satu jenis burung dari famili Phalacrocoracidae yang dijumpai dengan populasi melimpah di perairan KBBK. Diduga Taman Burung Kota Bandar Bara Kemayoran merupak.an salah satu lokasi untuk mencari mak.an bagi pecuk. Penelitian ini bertujuan untuk 1) mengkaji fungsi perairan di kawasan taman burung Kota Bruu Bandar Kemayoran dalam melestarikan burung pecuk hitrun, 2) menyusun suatu model yang dapat menggambarkan respons ekosistem perairan Kota Bara Bandar Kemayoran, yang dicerminkan oleh populasi pecuk hitam, terhadap perubahan lingkungan dengan menggunak.an skenru·io "20 tahun yang ak.an datang" dan 3) mengkaji dampak. pembangunan kawasan Taman Burung KBBK dan sekitamya terhadap kelestarian burung pecuk hitam dan kondisi perairan di wilayah tersebut. Hasil penelitian menunjukkan bahwa kualitas air di perairan waduk dan rawa cenderung buruk. Secara umum perairan waduk kondisinya lebih baik daripada perairan rawa yang memiliki kandungan oksigen terlaiut rendah, kandungan amonia da...'l. sulfida yang tinggi sehingga seringkali mengakibatkan kematian massal ikan. Pecuk hitam merupakan predator utama di perairan KBBK yang memakan ikan mujair sebagai pakan utama. dst ...
Keyword: Phalacrococidae

Judul: Ekologi pecuk hitam (Phalacrocorax sulcirostris Brandt, 1931) di Taman Burung Kota Baru Bandar Kemayoran Jakarta
Abstrak: Kota Baru Bandar Kemayoran (KBBK) terletak di pusat kota Jakarta dan kaya akan avifauna. Di dalam kawasan ini direncanakan pengembangan suatu taman burung, yang selain berfungsi untuk perlindungan juga berfungsi untuk kegiatan rekreasi bersifat mendidik, khususnya rekreasi pengamatan burung (bird watching). Salah satu jenis burung yang menarik untuk diamati yaitu Pecuk Hitam (Phalacrocorax sulcirostris), yang merupakan jenis dominan dan sering dijumpai. Jenis ini mempunyai perilaku khas yang tidak dimiliki oleh spesies lain, yaitu tarian gerakan sayap untuk menarik pasangan (wing waving) dan gerakan membuka sayap membentuk sudut patah di bagian siku berbentuk delta winged disebut wing spreading. Berdasarkan pengamatan awal, populasi Pecuk Hitam tersebar pada hampir semua tipe habitat, meliputi: habitat rawa, habitat mangrove, habitat semak dan habitat waduk buatan, sehingga mudah dijumpai, terutama di waduk buatan. Kondisi ini sangat baik untuk pengembangan rekreasi pengamatan burung (bird watching).
Keyword: 

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