Judul: Kajian Kemitraan pengelolaan air Taman Nasional Bromo Tengger Semeru di Kecamatan Senduro, Kabupaten Lumajang
Abstrak: Bromo Tengger Semeru National Park (BTSNP) is one of protected area that is managed by involving local people. The collaborative management in this national park is carried out in term of partnership water management by signing agreement of collaboration between national park and some partners. The aims of this study are to identify the partnership water management at BTSNP and finally give recommendation concerning collaboration of water management based on analysis result of impact and partnership problem and evaluation of partnership system. This study hopefully can give information about partnership water management at BTSNP and be useful as consideration to manager and partners for the future partnership.
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Judul: Studi Pemanfaatan Kawasan Laut Pasir Di Taman Nasional Bromo Tengger Semeru
Abstrak: Taman Nasional Bromo Tengger Semeru merupakan satu-satunya kawasan konservasi yang mempunyai keunikan berupa laut pasir. Metode yang digunakan untuk melihat persepsi pengunjung dan masyarakat menggunakan kuesioner dalam bentuk close ended dan menggunakan teknik skala likert . Analisis data dilakukan secara deskriptif dan menggunakan uji statistik chi square. Persepsi dari responden mendapatkan skor 5 (agak setuju) untuk jenis kegiatan yang dilakukan dan kondisi kawasan. Responden memberikan skor 3 (kurang setuju) untuk sumberdaya alam yang dimanfaatkan. Uji chi square untuk aspek persepsi menunjukkan bahwa nilai X2 hitung < X2tabel sebesar 0,95 < 12,59 hal ini menyatakan bahwa jawaban dari responden tidak memiliki perbedaan/ hubungan terhadap pertanyaan yang diberikan. Responden memberikan skor 5 (agak setuju) terhadap dampak ekonomi dan dampak ekologi yang ditimbulkan dari kegiatan pemanfaatan. Uji chi square untuk aspek dampak menunjukkan bahwa nilai X2 hitung > X2tabel sebesar 13,83 > 7,81 hal ini menyatakan bahwa jawaban dari responden memiliki perbedaan/ hubungan terhadap pertanyaan yang diberikan.
Keyword: dampak kegiatan pemanfaatan, laut pasir, pemanfaatan kawasan

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