Judul: Multi Social-Ecological System (SES) Connectivity in Tidung Island, Kepulauan Seribu, DKI Jakarta
Abstrak: Kegiatan di sektor perikanan dan pariwisata tidak terlepas dari keberadaan interaksi antara sistem sumberdaya dengan sistem manusia yang menjadi aktor di dalamnya. Aktivitas multi sektor pada sektor perikanan dan wisata bahari di Pulau Tidung hingga saat ini masih belum banyak diteliti secara lanjut. Penelitian ini bertujuan untuk mengidentifikasi konektivitas multi sektor antar komponen social-ecological system (SES) pesisir Pulau Tidung untuk memberikan opsi strategi pengelolaan pesisir Pulau Tidung berbasis SES yang berkelanjutan. Penelitian ini dilaksanakan pada bulan November hingga Desember 2023 di Pulau Tidung. Hasil penelitian menunjukkan bahwa kerangka konektivitas multi sektor Pulau Tidung menunjukkan interaksi yang dinamis antar atribut SES. Interaksi Resources Unit (RU) dan Resources Actor (RA) yang cukup mendominasi dalam kerangka konektivitas SES multi sektor Pulau Tidung menggambarkan bahwa kedua atribut tersebut menjadi komponen utama yang memerlukan perhatian lebih dalam penentuan strategi pengelolaan pesisir Pulau Tidung berbasis SES yang berkelanjutan. Keberadaan RU sejatinya ada untuk dimanfaatkan oleh RA dan menimbulkan pengaruh besar dalam konektivitas SES., Activities in the fisheries and tourism sectors are inherently linked through interactions between resources system and the human actors involved. However, multi sector activities in these sectors on Tidung Island have not been studied in detail. This research aims to identify the connectivity between components of the coastal social-ecological system (SES) of Tidung Island to provide sustainable SES based coastal management strategy options. The research was conducted from November to December 2023 on Tidung Island. The results indicate that the multi sector connectivity framework on Tidung Island demonstrates dynamic interactions between SES attributes. The interaction between resources unit (RU) and resources actor (RA) is particularly dominant in this framework, suggesting tha these two attributes are crucial for determining a sustainable SES based coastal management strategy for the island. The presence of resources unit (RU) is intended for utilization by resources actor (RA) significantly influencing SES connectivity
Keyword: konektivitas, pariwisata, social-ecological system, tourism, pesisir, Pulau Tidung, sistem sosial-ekologi, coastal, connectivity, Tidung Island

Judul: Socio-Ecological System of Mangrove Ecotourism in Pari Island, Seribu Island, DKI Jakarta
Abstrak: Ekosistem mangrove adalah ekosistem pesisir yang dimanfaatkan sebagai olahan pangan, perikanan, dan ekowisata. Tujuan penelitian ini adalah mengidentifikasi komponen sistem sosial ekologi, mendeskripsikan pemanfaatan serta faktor-faktor pendukung pengelolaan mangrove Pulau Pari, Kepulauan Seribu. Pengumpulan data diperoleh dengan pengukuran kerapatan mangrove dan kualitas air pada 3 stasiun. Wawancara dilakukan kepada masyarakat, wisatawan, dan pengelola wisata. Analisis data terdiri dari analisis kerapatan mangrove, konektivitas sistem sosial ekologi, analisis pemangku kepentingan, dan analisis strategi pengelolaan mangrove. Hasil menunjukkan bahwa komposisi mangrove di Pulau Pari tergolong dalam kategori sedang dengan spesies yang mendominasi adalah Rhizophora stylosa. Konektivitas yang terjadi pada sistem sosial-ekologi ekowisata mangrove menunjukkan bahwa peran resources governance masih minim. Rekomendasi pengelolaan yang penting untuk dilakukan yaitu kerjasama pemerintah dengan masyarakat pulau sebagai aktor yang turut serta mengelola ekosistem., Mangrove ecosystems are coastal ecosystems that are utilized as processed food, fisheries, and ecotourism. The purpose of this study was to identify the components of the social ecological system, describe the utilization and supporting factors of mangrove management on Pari Island, Kepulauan Seribu. Data collection was obtained by measuring mangrove density and water quality at 3 stations. Interviews were conducted with the community, tourists, and tour managers. Data analysis consists of mangrove density analysis, social ecological system connectivity, stakeholder analysis, and mangrove management strategy analysis. The results showed that the composition of mangroves on Pari Island was classified as moderate with the dominating species being Rhizophora stylosa. The connectivity that occurs in the social-ecological system of mangrove ecotourism shows that the role of resource governance is still minimal. Management recommendations that are important to do are government cooperation with the island community as actors who participate in managing the ecosystem.
Keyword: connectivity, ecotourism, mangrove, Pari Island

Judul: Approximation of the Median of Poisson Distribution Using the Relation of Poisson-Gamma Distribution
Abstrak: A major drawback of median is that median cannot usually be defined in closed form, even in the cases where their distribution functions are known. This study gives an approximation of the closed form for the median of the Poisson distribution by using the relation of Poisson-Gamma distribution. The approximation uses elementary techniques based on the monotonicity of certain sequences involving tail probabilities of the Poisson distribution and the Central Limit Theorem. Furthermore, a closed form expression for the mean absolute deviation 􀜧|􀜰􀰒 􀵆 􀜯􀝁􀝀􁈺􀜰􀰒􁈻| is also studied. The median is relevant because of the fact that it minimizes the mean absolute deviation of a Poisson random variable (􀜰􀰒􁈻 by considering median as central tendency.
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