Judul: Pengelolaan Ekosistem Terumbu Karang berbasis Resiliensi Masyarakat di Pulau Pari.
Abstrak: Terumbu karang merupakan ekosistem penting karena menyediakan jasa lingkungan sehingga diperlukan pengelolaan agar tetap terjaga. Pengelolaan ekosistem terumbu karang dapat dilakukan melalui pendekatan resiliensi masyarakat. Penelitian ini bertujuan untuk menganalisis langkah-langkah manajemen ekosistem terumbu karang berdasarkan status resiliensi masyarakat Pulau Pari melalui indikator persepsi, pengetahuan, ketergantungan, dan adaptasi. Data primer diperoleh dengan metode wawancara, sedangkan data sekunder diperoleh melalui kajian pustaka yang diolah dengan analisis korelasi. Hasil studi menunjukkan bahwa, resiliensi masyarakat Pulau Pari tergolong sedang (59,66). Resiliensi masyarakat perlu ditingkatkan melalui parameter utamanya, yaitu pengetahuan tentang zonasi dan terumbu karang, pemanfaatan berkelanjutan, persepsi terkait dampak reklamasi, keikutsertaan dalam konservasi karang. Pengelolaan ekosistem terumbu karang dapat dioptimalkan melalui pembentukan forum komunikasi masyarakat, meningkatkan perilaku konservatif, dan penyesuaian masyarakat terhadap pekerjaan alternatif.
Keyword: indikator resiliensi sosial, pengelolaan ekosistem terumbu karang, resiliensi sosial, terumbu karang

Judul: Pemetaan Resiliensi Ekosistem Terumbu Karang untuk Pengelolaan Berkelanjutan (Studi Kasus Gugus Pulau Pari, Kepulauan Seribu, DKI Jakarta).
Abstrak: Resiliensi terumbu karang adalah kemampuan ekosistem terumbu karang untuk bertahan dan pulih dari perubahan. Tujuan penelitian ini adalah memetakan status resiliensi ekositem terumbu karang Gugus Pulau Pari di Kepulauan Seribu, DKI Jakarta yang dibagi menjadi empat zona. Resiliensi ekosistem terumbu karang melibatkan empat aspek resiliensi, yaitu ekologi terumbu karang dan ikan karang, serta sosial-budaya dan ekonomi. Aspek-aspek resiliensi dianalisis secara spasial menggunakan metode weighted overlay. Hasil analisis menunjukan bahwa status resiliensi ekosistem terumbu karang Gugus Pulau Pari, Zona 1 dan 2 adalah buruk, sedangkan Zona 3 dan 4 berstatus sedang. Nilai resiliensi bervariasi antara 2,57- 2,86. Strategi pengelolaan yang direkomendasikan adalah restocking ikan untuk Zona 1 dan 2, ekowisata untuk Zona 3, dan area perlindungan laut untuk Zona 4.
Keyword: Gugus Pulau Pari, resiliensi, terumbu karang

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