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: Construction of Strongly Optimal Binary Linear Code with Minimum Distance 9 and 11
Abstrak: A binary linear code of length n over q F is a subspace of n q F . A code has three parameters that attached to it, namely length, dimension, and minimum distance. A code with length n, dimension k and minimum distance d is often called [n, k, d ]-code. Usually, when two parameters are given, then we want to find a code that has the best value for the last parameter. Based on Gilbert- Varshamov bound, if a [n, k, d ]-code exists and can not be expanded, we call it a strongly optimal code. In this paper, we construct strongly optimal code with minimum distance 9 and 11. In constructing the code, we created a theorem and algorithm based on Gilbert-Varshamov bound before we implement the algorithm to MAPLE programming language. Because of computational limitations, the program can only construct up to k = 10 for d = 9 and k = 12 for d = 11.
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