Judul: Persepsi dan kecenderungan perubahan persepsi masyarakat Pulau Samosir, Kabupaten Tapanuli Utara tentang kelestarian kualitas perairan Danau Toba : Studi kasus di Pangururan, Simanindo, Tomok dan Nainggolan
Abstrak: Pembangunan berwawasan lingkungan, sebagaimana dijelaskan dalam GBHN merupakan landasan pokok bagi segenap pelaksanaan kegiatan pembangunan di Indonesia, dalam rangka menjamin kesinambungan pemanfaatan sumberdaya alam dan menjaga kelestarian lingkungan hidup. Upaya menjamin fungsi Danau Toba yang strategis sebagai sumberdaya alam pembangunan, memerlukan peranserta masyarakat. Dalam upaya melibatkan masyarakat dalam suatu kegiatan, lebih dahulu perlu diketahui persepsi masyarakat dalam memandang obyek tersebut. Persepsi telah didefinisikan oleh Kertapati (1981), Desirato (1986), Mc Mahon dan Mc Mahon (1986) dan Allport (1987). Secara umum persepsi didefinisikan sebagai proses penginderaan, penyusunan dan penafsiran rangsangan, sehingga seseorang dapat mengenali, memahami dan menilai maksud rangsangan yang diterimanya. Empat karakteristik penting yang dapat mempengaruhi persepsi (Sadli, 1976) yaitu: faktor ciri- ciri dari obyek stimulus, faktor-faktor pribadi, faktor pengaruh kelompok, faktor perbedaan latar belakang, sedangkan Powel (1963), menyatakan bahwa jenis kelamin dan umur dapat mempengaruhi persepsi.
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Judul: Perilaku konservasi masyarakat di Kelurahan Pulau Panggang, Taman Nasional Laut Kepulauan Seribu
Abstrak: Permasalahan di kawasan konservasi masih sering terjadi di Indonesia, yang disebabkan oleh gejala alam atau manusia. Permasalahan tersebut dapat diatasi melalui pemberdayaan sebagai upaya untuk meningkatkan kapasitas dan kualitas masyarakat dalam mengelola dan memanfaatkan sumberdaya alam secara lestari dan berkelanjutan. Tujuan penelitian ini adalah menganalisis bagaimana perilaku konservasi masyarakat di Kelurahan Pulau Panggang, tingkat partisipasi masyarakat dalam program dan faktor-faktor yang mempengaruhi, serta bagaimana pengaruh partisipasi dalam program “Sentra Penyuluh Konservasi Pedesaan” terhadap perilaku konservasi masyarakat. Metode yang digunakan dalam penelitian ini adalah dengan pendekatan kuantitatif yang didukung oleh data kualitatif. Hasil dari penelitian ini adalah bahwa perilaku konservasi masyarakat rendah, tingkat partisipasi masyarakat tinggi dalam tahap pelaksanaan dan menikmati hasil, sedangkan partisipasi masyarakat berpengaruh terhadap perilaku konservasi, kecuali tahap menikmati hasi yang hanya berpengaruh pada aspek kogniti
Keyword: Community empowerment, Participations, Conservation behavior

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