Judul: Persepsi masyarakat terhadap ekowisata perkampungan budaya betawi sebagai pelestarian situ dan cagar budaya
Abstrak: Dalam penelitian studi kasus ini dipelajari persepsi masyarakat terhadap ekowisata Perkampungan Budaya Betawi sebagai pelestarian situ dan cagar budaya. Penelitian diawali dengan melakukan observasi kawasan sebagai implikasi kebijakan Gubernur DKI Jakarta (Keputusan Nomor 92 tahun 2000 Tentang Penataan Perkampung an Budaya Betawi di Kelurahan Srengseng Sawah, Kecamatan Jagakarsa, Kotamadya Jakarta Selatan) dan diakhiri dengan menjajaki pengembangan ekotorisme sebagai konsep pengelolaan di kawasan ini.. Data persepi masyarakat diperoleh melalui wawancara menggunakan kuesioner dengan pertanyaan tertutup kemudian diolah dan dianalisis dengan Chi Square menggunakan program SPSS 11.5. Adapun data mengenai kawasan dan implikasi kebijakan diperoleh melalui serangkaian diskusi dengan tokoh masyarakat kawasan, kemudian pemikiran dan pandangan ahli diperoleh dengan cara mendampingi mereka mengunjungi kawasan sekaligus berinteraksi dengan masyarakat kawasan. or Huk cipta milik IPR University Skala Likert digunakan dalam pengukuran variabel pengetahuan dan persepsi kelompok masyarakat yang terdiri atas kelompok masyarakat warga asli, pendatang. pemudik dan pemerhati. Pengetahuan kelompok masyarakat pemudik dan kelompok masyarakat pemerhati sama-sama memiliki pengetahuan yang cukup baik mengenai kawasan, persepsi mereka juga baik terhadap ekoturisme kawasan sebagai pelestarian situ dan cagar budaya, kelompok masyarakat warga asli mengenai kawasan secara umum cukup baik tetapi persepsinya kurang baik. Sedangkan pengetahuan kelompok masyarakat pendatang mengenai kawasan kurang baik, demikian pula persepsi mereka kurang baik. Perbedaan pengetahuan mengenai kawasan antar kelompok masyarakat dan persepsi terhadap ekoturisme Perkampungan Budaya Betawi antar kelompok masyarakat tidak dipengaruhi oleh karakteristik responden yang meliputi jenis kelamin, usia, pendidikan, pekerjaan dan penghasilan. Kelompok masyarakat yang memiliki persepsi kurang baik karena mereka kurang memahami fungsi ekologis kawasan sebagai zona statis dan fungsi sosial masyarakat sebagai zona dinamis.
Keyword: Ekowisata, Situ, Cagar budaya, Ekologis situ

Judul: Community Perception and Participation in Supporting  the Conservation of Betawi Cultural Village, Setu Babakan, Jakarta Selatan.
Abstrak: Perkampungan Budaya Betawi (PBB) Setu Babakan merupakan Kawasan Cagar Budaya seluas ± 289 Ha yang terletak di Srengseng Sawah, Jagakarsa, Jakarta Selatan, dan ditujukan sebagai pusat budaya Betawi. Peran masyarakat diperlukan dalam pelestarian kawasan, sehingga penelitian ini bertujuan untuk menganalisis faktor-faktor yang mempengaruhi persepsi dan partisipasi masyarakat, menganalisis peran masyarakat dalam mendukung pelestarian Kawasan Perkampungan Budaya Betawi, dan memberikan rekomendasi untuk mengoptimalkan peran masyarakat dalam mendukung pelestariannya. Metode penelitian yang digunakan adalah mixed method antara kualitatif dan kuantitatif, dengan pengolahan data uji chi-square menggunakan SPSS. Analisis uji chi-square menggambarkan adanya hubungan antara faktor lama tinggal (0,044) dengan persepsi, serta hubungan antara etnik (Asypm. Sig 0,043) dan lama tinggal (Asymp. Sig 0.003) dengan partisipasi masyarakat. Upaya pelestarian yang diusulkan yaitu dengan peningkatan pengetahuan masyarakat, peningkatan partisipasi masyarakat serta peningkatan pengelolaan kawasan., The Setu Babakan Betawi Cultural Village (PBB) is a Cultural Heritage Area with an area of ± 289 hectares located in Srengseng Sawah, Jagakarsa, South Jakarta, and is designated as a Betawi cultural center. The role of the community is needed in preserving the area, so this study aims to analyze the factors that influence community perception and participation, analyze the role of the community in supporting the preservation of the Betawi Cultural Village Area, and provide recommendations for optimizing the community's role in supporting its preservation. The research method used is a mixed method between qualitative and quantitative, by processing the chi-square test data using SPSS. The chi-square test analysis illustrates that there is a relationship between the length of stay (0.044) and perceptions, as well as the relationship between ethnicity (Asypm. Sig 0.043) and length of stay (Asymp. Sig 0.003) and community participation. The proposed conservation efforts are by increasing community knowledge, increasing community participation and improving area management.
Keyword: Cagar Budaya, Kampung Budaya Betawi Setu Babakan, Pelestarian, Pengelolaan, Uji Chi-square, Chi-square test, Cultural heritage, Management, Preservation, Setu  Babakan Betawi Cultural Village

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