Judul: Pengetahuan dan Persepsi Masyarakat Mengenai Konservasi Buaya di Dua Desa di Kalimantan Tengah
Abstrak: Desa Sekonyer dan Desa Tanjung Putri merupakan desa yang bersinggungan langsung dengan Taman Nasional Tanjung Puting dan Suaka Margasatwa yang menjadi habitat buaya. Penelitian ini bertujuan mengidentifikasi karakteristik masyarakat, pengetahuan masyarakat mengenai jenis buaya, dan menentukan persepsi dan perilaku masyarakat mengenai konservasi buaya. Pengambilan data dilakukan dilakukan dengan mewawancara 100 responden yang terdiri dari penduduk asli (Suku Melayu dan Suku Dayak) dan pendatang (Suku Jawa). Responden didominasi laki-laki, pendidikan Sekolah Dasar (SD) dan bekerja sebagai nelayan (Desa Tanjung Putri) atau karyawan perkebunan sawit (Desa Sekonyer). Sebanyak 82% responden dari kedua desa mengetahui dan dapat membedakan buaya senyulong dan buaya muara namun, masyarakat kurang mengetahui manfaat buaya di Desa Sekonyer (50%) dan di Desa Tanjung Putri (80%). Mayoritas responden pada kedua desa menyatakan sikap setuju dan sangat setuju terhadap konservasi buaya di Desa Sekonyer dan Tanjung Putri. Sebanyak (82%) responden di Desa Sekonyer dan (70%) responden di desa Tanjung Putri menyatakan setuju bahwa manusia dan buaya dapat hidup berdampingan.
Keyword: conservation, crocodile, knowledge, perception

Judul: Persepsi pengunjung kandang Buaya Muara (Crocodylus porosus) di Taman Buaya Indonesia Jaya dan Taman Margasatwa Ragunan
Abstrak: Penelitian ini bertujuan untuk menganalisis persepsi pengunjung terhadap buaya muara di Taman Buaya Indonesia Jaya (TBIJ) dan Taman Margasatwa Ragunan (TMR). Metode yang digunakan yaitu observasi lapang dan wawancara terstruktur dengan penentuan jumlah responden menggunakan quota sampling sebanyak 120 orang pada masing-masing lokasi. Responden yang datang ke TBIJ umumnya berasal dari Bekasi dengan rata-rata jumlah kunjungan 1 kali dan lama kunjungan 1 jam. Responden berkunjung karena lokasi dekat dan untuk belajar buaya. Responden TMR berasal dari Jakarta dengan rata-rata jumlah kunjungan lebih dari 3 kali dan lama kunjungan 6 jam. Responden berkunjung karena biaya murah sekaligus rekreasi. Pengetahuan pengunjung mengenai buaya muara tergolong minim yang disebabkan kurangnya pengalaman belajar tentang buaya. Pengunjung belum dapat mempraktekkan perilaku konservasi terhadap buaya walaupun persepsi pengunjung tentang konservasi buaya tergolong baik. Pengunjung di TMR lebih banyak memberikan nilai positif terhadap aspek-aspek yang terdapat di TMR sedangkan penilaian pengunjung di TBIJ hanya memberikan nilai positif pada kondisi fisik buaya.
Keyword: crocodiles park, estuarine crocodile, visitors perception, zoo

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