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: Coral Reef Resources Assessment for Snorkeling Ecotourism Management in Pramuka Island, Kepulauan Seribu
Abstrak: Wisata bahari yang paling populer di Pulau Pramuka adalah wisata snorkeling. Wisata snorkeling di Pulau Pramuka diminati oleh banyak wisatawan dan hal tersebut berpengaruh terhadap kelangsungan sumber daya. Penelitian ini bertujuan untuk membuat opsi pengembangan potensi wisata snorkeling dengan pendekatan valuasi ekologi dan ekonomi sumber daya alam. Pengambilan data dilaksanakan pada bulan Desember 2019 di Pulau Pramuka, TNKpS. Analisis data yang digunakan, yaitu IKW (Indeks Kesesuaian Wisata), DDK (Daya Dukung Kawasan), TCM (Travel Cost Method), WTP (Willingness To Pay), dan analisis SWOT (Strength Weakness Opportunity Threat). Wisata snorkeling di Pulau Pramuka termasuk kategori sesuai (IKW: 2,26) dan nilai DDK sebesar 311 orang perhari. Estimasi penerimaan dikaitkan dengan daya dukung kawasan sebesar Rp. 18.882.054 per hari. Rekomendasi pengelolaan diantaranya rehabilitasi sumber daya dengan melibatkan masyarakat dan penerapan wisata dengan konsep ekowisata., The most popular marine tourism on Pramuka Island is snorkeling. Tourists have a high interest in snorkeling tours and it affects the sustainability of resources. This study aims to make options for developing the potential for snorkeling tourism with ecological and economic valuation approach to natural resources. This research was conducted in December 2019 in Pramuka Island, TNKpS. The analysis data were TSI (Tourism Suitability Index), CC (Carrying Capacity), TCM (Travel Cost Method), WTP (Willingness To Pay), and SWOT (Strength Weakness Opportunity Threat). The result showed that snorkeling tours in Pramuka Island were in the suitable category TSI: 2,26) and the CC value was 311 people per day. Estimate of economic was Rp. 18.882.054 per day. Management recommendation are the rehabilitation of resources by involving the community and the application of tourism with the concept of ecotourism.
Keyword: carrying capacity, snorkeling, tourist suitability index, willingness to pay

Judul: Mathematical model of Hematopoietic Stem Cell in Chronic Myelogenous Leukemia with and without Therapy
Abstrak: Leukemia or blood cancer is a diverse group of neoplastic disease, characterized by the multiplication of abnormal leukocytes or malignant transformation of blood-forming cells in bone marrow and lymphoid tissues. One of the most common types of leukemia is Chronic Myelogenous Leukemia (CML), which is usually diagnosed by the presence of certain chromosomal abnormalities, the so-called Philadelphia chromosome (Ph). One of the treatments of CML is Granulocyte Colony-Stimulating Factor (G-CSF). In this paper, we discuss two Hematopoietic Stem Cell (HSC) models, i.e. HSC without treatment and HSC with G-CSF treatment. The model of HSC without treatment included three equations representing the dynamics of HSC, leukocyte and platelet. Whereas, the model of HSC with G-CSF treatment includes the previous three equations and adds two more equations representing G-CSF injection and G-CSF circulation. The stability behavior of the system approaching the equilibrium points in the simulation study is carried out using Mathematica 7.0. The simulation results show that the G-CSF treatment can successfully decrease the number of HSC, which means reducing the CML.
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