Judul: Konektivitas Sistem Sosial-Ekologi dalam Kegiatan Ekowisata Mangrove di Wilayah Pesisir Kecamatan Tirtayasa, Serang, Banten.
Abstrak: Ekosistem mangrove merupakan ekosistem pesisir yang kompleks dan memiliki berbagai fungsi bagi masyarakat sekitar. Salah satu fungsi kultural ekosistem mangrove ialah sebagai kawasan wisata. Tujuan utama penelitian adalah mengidentifikasi dan memetakan keterkaitan komponen sistem sosial-ekologi, serta menganalisis faktor-faktor pendukung pengelolaan ekosistem mangrove untuk kegiatan ekowisata. Penelitian ini dilaksanakan pada bulan Maret 2022 di pesisir Desa Lontar, Kecamatan Tirtayasa, Serang, Banten. Metode yang digunakan adalah metode wawancara dengan melakukan pengisian e-kuesioner kepada masyarakat pemanfaat ekosistem mangrove dan wisatawan. Analisis dilakukan dengan menggunakan pendekatan Sistem Sosial-Ekologi dan metode Participatory Prospective Analysis (PPA). Hasil menunjukkan bahwa seluas 75% pesisir Lontar telah ditumbuhi pohon mangrove yang cukup lebat dengan dominasi jenis Rhizophora sp. Ekosistem mangrove seluas 4 ha tersebut dimanfaatkan sebagai kawasan ekowisata "Jembatan Pelangi". Keterkaitan konponen antara resources system - resources unit, resources system - resources governance, dan resources unit - resources governance memiliki hubungnan yang saling positif. Namun, resources governance memberikan hubungan yang negatif terhadap resource actors. Sementara itu, resources actors memberikan hubungan yang negatif dengan resource system dan resource unit. Variabel utama dalam keberhasilan pengelolaan ekowisata mangrove ialah jumlah pengunjung, harga tiket, promosi wisata, tipologi ekosistem mangrove, dan kebijakan pemerintah.
Keyword: connectivity, ecoturism, management, mangrove, socio-ecology

Judul: Social-Ecological System Connectivity of Mangrove Ecotourism in Tidung Island, Seribu Seribu, DKI Jakarta
Abstrak: Mangrove ecosystems have several other functions as abrasion prevention, wave breakers, feeding ground for aquatic biota that live in mangroves. Mangrove ecosystems have a cultural function for connectivity between ecological subsystems and social subsystems. The purpose of the study was to identify and map the components of the ecological social system and analyze the factors supporting management in the mangrove ecotourism area. The research was conducted from September to November 2023 on Tidung Island. The analysis used is the social- ecological system approach and stakeholder analysis. The results obtained are the total mangrove area is 70 Ha which is dominated by R. Stylosa mangrove species. Mangrove ecosystems are utilized in mangrove ecotourism and become the main source of livelihood for fishermen. Supporting factors that can manage mangroves to be sustainable are stakeholders (Kelurahan and PBKL) and the Tidung Island community
Keyword: connectivity, ecoturism, management, mangrove, ses

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