Judul: Kajian Potensi Sumberdaya Setu Babakan Dki Jakarta Untuk Pengelolaan Ekowisata
Abstrak: Setu Babakan yang berada di wilayah DKI Jakarta merupakan kawasan wisata yang memiliki potensi sumberdaya alam dan wisata yang tinggi. Tujuan penelitian ini adalah untuk mengidentifikasi potensi sumberdaya, kesesuaian wisata, daya dukung kawasan, dan mengkaji strategi pengelolaan wisata Setu Babakan. Penelitian ini dilakukan pada Bulan Oktober hingga Desember 2014. Analisis yang digunakan terdiri: kualitas air, kesesuaian wisata, daya dukung kawasan, dan strategi pengelolaan wisata. Hasil penelitian menunjukkan bahwa pada perairan Setu Babakan masih dikategorikan dalam keadaan baik untuk kegiatan sarana/prasarana rekreasi air serta tidak melebihi baku mutu air kelas II. Total daya dukung kawasan untuk kegiatan wisata perahu dan memancing sebesar 104 orang/hari. Pengelolaan yang dapat disarankan adalah perlu adanya peningkatan harga dan fasilitas wisata untuk memanfaatkan potensi yang ada dengan memperhatikan daya dukung kawasan.
Keyword: Daya dukung kawasan, kesesuaian wisata, strategi pengelolaan, Setu Babakan

Judul: Upaya Pengelolaan Situ Babakan Sebagai Kawasan Wisata  Agro Berkelanjutan di DKI Jakarta
Abstrak: Situ Babakan adalah salah satu situ yang ada di Jakarta Selatan, telah ditetapkan sebagai salah satu tujuan wisata, berdasarkan swat keputusan Gubernur DKI Jakarta No 92 tahun 2000. Untuk mewujudkan Situ Babakan sebagai kawasan wisata agro berkelanjutan, harus didasarkan minimal pada tiga aspek utama antara lain: (1) kondisi perairan Situ Babakan; (2) persepsi dan sikap masyarakat di sekitar Situ Babakan, (3) persepsi clan sikap masyarakat pengunjung Situ Babakan sebagai pengguna. Sehubungan dengan itu, telah dilakukan penelitian tentang: Upaya Pengelolaan Situ Babakan Sebagai Wisata Agro Berkelanjutan di DKI Jakarta, selama 7 bulan mulai Mei sampai dengan Nopember 2002. Penelitian bertujuan untuk mengetahui: (1) Mengkaji mutu lingkungan perairan Situ Babakan berdasarkan beberapa parameter kualitas air yang ditetapkan pemerintah dalam PP No 82 tahun 2001; (2) Mendeskripsikan persepsi masyarakat di sekitar Situ Babakan dalam rangka mewujudkan Situ Babakan sebagai wisata agro di DKI Jakarta; (3) Mendeskripsikan persepsi masyarakat pengunjung terhadap keberadaan Situ Babakan
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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