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: 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: 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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