Judul: Management of Mangrove Conservation Areas for Ecotourism Activities in Pramuka Island, Seribu Islands
Abstrak: Ekosistem mangrove Pulau Pramuka merupakan kawasan konservasi yang dijadikan sebagai kawasan ekowisata tracking mangrove. Kegiatan wisata tersebut tentu dapat meningkatkan kegiatan ekonomi. Kawasan wisata mangrove tersebut memiliki infrastruktur yang rusak disebabkan kurangnya perawatan oleh pihak taman nasional karena adanya pandemi. Tujuan dilakukan penelitian ini untuk menganalisis kesesuaian wisata dan mengestimasi nilai valuasi kesediaan membayar untuk perbaikan kawasan ekowisata tracking mangrove di ekosistem mangrove Pulau Pramuka. Pengambilan data yang dilakukan mencakup ekologi mangrove, pendapat wisatawan terkait kesediaan membayar perbaikan kawasan tracking mangrove, dan pandangan masyarakat dengan hadirnya ekosistem mangrove dan wisata yang ada didalamnya. Indeks kesesuaian wisata yang diperoleh bahwa kawasan mangrove Pulau Pramuka masih belum sesuai untuk dijadikan kawasan wisata karena faktor ketebalan dan jumlah jenis mangrove yang masih rendah. Pelancong atau wisatawan yang berkunjung mayoritas bersedia mendukung keberlanjutan wisata di ekosistem mangrove dengan bersedia membayar jasa lingkungan untuk pembangunan tracking mangrove dengan perolehan total WTP pembangunan sebesar Rp. 982.766.400/tahun dan diperoleh dengan metode open endded. Tingkat pandangan serta pemahaman masyarakat terhadap mangrove sudah masuk kategori tinggi dan pendekatan untuk pengelolaan kawasan mangrove dapat dilakukan dengan mendekati masyarakat dari kategori pendidikan SMA keatas., Pramuka Island mangrove ecosystem is a conservation area that is currently used as a mangrove tracking ecotourism area. These ecotourism activities are certainly expected to increase economic activities. However due to covid-19 pandemic there was of lack of maintenance by national park amanagement authority that leads to infratstructure damages. The purpose of this research is to analyze the suitability of tourism areas and estimate the valuation of willingness to pay for the improvement of mangrove tracking ecotourism areas in the Pramuka Island mangrove ecosystem. Data collected were included mangrove ecology, tourist willingness to pay for mangrove tracking facility improvements, and community perspectives on the presence of mangrove ecosystems and tourism activities. According to tourism suitability index analysis, Pramuka Island mangrove area is still not suitable for a tourism area due to the low score of mangrove ecosystem thikness and low number of mangrove species biodiversity. The majority of tourists are willing to support the sustainability of tourism in the mangrove ecosystem by paying environmental services to reconstruct mangrove tracking facility. Based on open ended method, the total willingness to pay (WTP) for reconstructing mangrove tracking facilities is amounted to Rp. 982,766,400 / year. The level of community perspective and understanding to mangroves function and benefit is already in the high category and managing this mangrove area management can be conducted by involving local people from the high school education category and above.
Keyword: ecotourism, mangroves, perception, Pramuka Island, WTP

Judul: Coastal Ecotourism management strategies on Pramuka Island, Seribu Islands with Social Ecology Approach
Abstrak: Pulau Pramuka merupakan salah satu destinasi unggulan di Kepulauan Seribu dan memiliki potensi alam yang kaya dan menarik bagi pariwisata. Tujuan penelitian ini untuk menganalisis kesesuaian wisata, daya dukung kawasan, persepsi sosial, dan menghitung nilai ekonomi sumber daya wisata untuk merumuskan strategi pengelolaan ekowisata pantai yang efektif. Analisis data yang digunakan adalah IKW, DDK, TCM, analisis Skala Likert dan SWOT. Analisis data pantai di Pulau Pramuka termasuk kategori sesuai (IKW: 2,18) dengan nilai DDK rekreasi pantai sebesar 33 orang per hari. Analisis persepsi mengenai objek wisata pantai berada pada kategori positif (SL: 2,59). Estimasi penerimaan nilai ekonomi wisata tahun 2022 sebesar Rp. 453.830.611,00. Meskipun demikian, perbaikan pengelolaan lingkungan dan kesadaran masyarakat masih diperlukan. Saran strategi-strategi pengembangan ekowisata melalui SWOT adalah mempertahankan daya tarik dan aktivitas wisata, program edukasi masyarakat, penataan dan perawatan fasilitas rutin dan non-rutin, memelihara sumber daya alam, dan memelihara sarana transportasi. Pengelolaan ekowisata yang efektif memerlukan kolaborasi antara pemerintah, masyarakat, dan pemangku kepentingan lainnya untuk memaksimalkan potensi pariwisata sambil melestarikan lingkungan., Pramuka Island is one of the featured destinations on Seribu Islands and has a rich natural potential and attractive for tourism. The purpose of this research is to analyzing tourism suitability, area carrying capacity, social perceptions, and calculate the economic value of tourism resources to formulating coastal ecotourism management strategies on Pramuka Island. Data analysis used IKW, DDK, TCM, Likert Scale analysis and SWOT. Data analysis of the coastal on Pramuka Island is in the appropriate category (IKW: 2,18) with a coastal recreation carrying capacity value of 33 people per day. Analysis of perceptions about coastal attractions is in the positive category (SL: 2.59). Estimated revenue of tourism economic value in 2022 amounted to Rp. 453.830.611,00. Despite this, improvements in environmental management and public awareness is still needed. Suggestions for ecotourism development strategies through SWOT are maintaining tourist attractions and activities, community education programs, structuring and maintaining routine and non-routine facilities, maintaining natural resources, and maintaining transportation facilities. Effective ecotourism management requires collaboration between the government, community, and other stakeholders to maximize tourism potential while preserving the environment.
Keyword: daya dukung kawasan, ekowisata, kesesuaian wisata, strategi pengelolaan, ecotourism, carrying capacity, tourism suitability index, management strategies

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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