Judul: Action Plan for Community Based Mangrove Tourism in Pasar Banggi Rembang Regency
Abstrak: Rencana aksi diperlukan untuk mengelola ekowisata ekosistem mangrove di Pasar Banggi yang memiliki potensi mangrove yang tinggi guna meningkatkan kesejahteraan masyarakat. Penelitian ini bertujuan membuat rencana aksi pengembangan wisata mangrove yang berbasis masyarakat di Desa Pasar Banggi Kabupaten Rembang. Penelitian lapang dilakukan selama bulan Febaruari 2021 sampai Mei 2021 dilanjutkan bulan Desember 2022. Hasilnya, nilai kerapatan mangrove tertinggi sebesar 9767 ind/ha, jumlah tegakan berbeda disetiap stasiun Berdasarkan Indeks kesesuaian ekologi, kawasan wisata mangrove pasar banggi termasuk kategori sesuai. Daya dukung kawasan ekowisata mangrove Pasar Banggi sebanyak 46 orang perhari, sedangkan jumlah kunjungan rata rata saat ini masih 40 orang perhari. Rencana aksi berbasis masyarakat yang diajukan adalah: penambahan tempat parkir, sentra kuliner, menara pemantau, plantasi mangrove, penambahan akses jalan menuju tempat wisata, dan penambahan pembatas jembatan., An action plan is needed to manage mangrove ecosystem ecotourism in Banggi Market which has high mangrove potential to improve people's welfare. This study aims to create an action plan for the development of community-based mangrove tourism in Pasar Banggi Village, Rembang Regency. Field research was conducted from February 2021 to May 2021 followed by December 2022. As a result, the highest mangrove density value was 9767 ind/ha, the number of stands was different at each station. Based on the ecological suitability index, the Pasar Banggi mangrove tourism area is in the appropriate category. The carrying capacity of the Pasar Banggi mangrove ecotourism area is 46 people per day, while the average number of visits is currently still 40 people per day. The proposed community-based action plans are: additional parking lots, culinary centers, monitoring towers, mangrove planting, additional access roads to tourist attractions, and additional bridge barriers.
Keyword: tourism suitability, potential, action plan, carrying capacity

Judul: Pengelolaan Ekosistem Mangrove Berbasis Co-Management di Desa Pasarbanggi, Kabupaten Rembang, Jawa
Abstrak: Mangrove merupakan salah satu ekosistem penting pesisir yang memiliki berbagai manfaat dan pemanfaatannya dilakukan oleh berbagai pemangku kepentingan. Penelitian ini bertujuan untuk 1) mengetahui dan menganalisis kondisi sumber daya mangrove dan masyarakat pemanfaat,2) menganalisis peran dan fungsi setiap pemangku kepentingan, serta 3) mengetahui dan menganalisis bentuk co-management terhadap pengelolaan ekosistem mangrove Desa Pasarbanggi, Kabupaten Rembang. Pengambilan data vegetasi mangrove dilakukan dengan menggunakan metode transek kuadrat; sedangkan pengambilan data sosial ekonomi, kelembagaan, dan wawancara dengan metode survei dan purposive sampling. Data yang diperoleh dari vegetasi mangrove meliputi kerapatan, frekuensi, penutupan, dan indeks nilai penting mangrove. Analisis pemangku kepentingan dengan menggunakan matriks kepentingan dan pengaruh. Penelitian menunjukkan terdapat 5 jenis mangrove di Desa Pasarbanggi yaitu Avicennia marina, Rhizophora mucronata, Rhizophora apiculata, Rhizophora stylosa dan Sonneratia alba. Strategi dalam rangka perluasan hutan mangrove yaitu dengan jenis-jenis tersebut. Analisis stakeholder mengidentifikasi 16 pemangku kepentingan yang diklasifikasi dalam 4 grup yaitu subject, key players, crowd, dan by standers. Pengelolaan mangrove di Desa Pasarbanggi masih dalam tahap konsultatif. Untuk meningkatkan efektifitas, pengelolaan diarahkan pada tingkat kooperatif dalam spektrum co-management dengan strategi manajemen.
Keyword: 

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