Judul: Manajemen Penangkaran dan Perilaku Perkembangbiakan Kakatua Tanimbar di Raharjo Bird Farm Solo, Jawa Tengah
Abstrak: Kakatua tanimbar merupakan kakatua paling kecil yang ada di Indonesia. Burung ini merupakan burung endemik kepulauan Tanimbar, Maluku. Populasinya terus berkurang akibat perburuan liar. Salah satu solusi yang dapat dilakukan yakni dengan konservasi ex situ melalui penangkaran. Raharjo Bird Farm merupakan penangkaran yang berhasil menangkarkan kakatua tanimbar. Tujuan dari penelitian ini yakni untuk mengidentifikasi manajemen penangkaran, keberhasilan reproduksi, dan perilaku perkembangbiakan kakatua tanimbar di Raharjo Bird Farm Solo, Jawa Tengah. Hasil penelitian menunjukkan bahwa sistem manajemen kakatua tanimbar di Raharjo Bird Farm yakni sistem intensif. Keberhasilan reproduksi dengan ratarata persentasi jumlah induk bertelur yakni 68%, rata-rata persentase daya tetas telur dan kematian anak yakni 50%. Perilaku perkembangbiakan kakatua tanimbar terdiri dari perilaku bercumbu dan perilaku kawin (kopulasi). Frekuensi perilaku bercumbu yakni 87,5% dan total durasi 13 menit (0,2%) dari total waktu pengamatan. Frekuensi perilaku kawin yakni 12,5% dengan total durasi 2,2 menit (0,026%) dari total waktu pengamatan.
Keyword: kakatua tanimbar, manajemen penangkaran, perilaku perkembangbiakan

Judul: Manajemen Penangkaran, Perilaku Makan, dan Konsumsi Pakan Kakatua Raja (Probosciger aterrimus) di Raharjo Bird Farm Solo, Jawa Tengah
Abstrak: Kakatua raja adalah burung paruh bengkok terbesar di Indonesia dengan panjang tubuh mencapai 64 cm. Burung ini tersebar di wilayah Papua Nugini, Papua Barat, Kepulauan aru, dan Australia bagian utara. Penelitian tentang kakatua raja di Indonesia masih sangat sedikit. Upaya penangkaran sudah dilakukan namun tingkat keberhasilan masih rendah. Raharjo Bird Farm adalah salah satu penangkaran di Indonesia yang mengembangbiakkan kakatua raja. Tujuan dari penelitian ini adalah mengidentifikasi manajemen penangkaran, mendeskripsikan perilaku makan, dan menghitung konsumsi pakan kakatua raja di Raharjo Bird Farmn Metode yang digunakan meliputi pengamatan langsung, wawancara, dan studi literatur. Hasil penelitian menunjukkan manajemen penangkaran kakatua raja di Raharjo Bird Farm dilakukan secara insensif. Kakatua raja jantan menghabiskan 2.37 waktu aktifnya untuk makan, dan betina menghabiskan 2.12% waktu aktifnya untuk makan. Energi yang konsumsi kakatua raja di Raharjo Bird Farm sebanyak 103.68 Kkal/ekor/hari, dan protein sebanyak 27%/ekor/hari.
Keyword: Kakatua raja, konsumsi pakan, manajemen penangkaran, perilaku makan

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