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: Analysis of Green Tourism Concept Development with Behavioral Economics Approach (Case Study: Pramuka Island Beach), Analysis of Green Tourism Concept Development with Behavioral Economics Approach (Case Study: Pramuka Island Beach)
Abstrak: Berdasarkan laporan Badan Pusat Statistik (BPS) tahun 2022, penerimaan devisa negara dari sektor pariwisata adalah sebesar 4,26 miliar US$. Nilai tersebut menjadikan sektor ini menempati urutan keempat sebagai penyumbang tertinggi perekonomian negara. Salah satu objek wisata yang banyak dikunjungi pada tahun 2022 adalah Kepulauan Seribu tepatnya di Pulau Pramuka. Namun, sayang potensi yang dimiliki tidak berbanding lurus dengan pengelolaan sumber daya alam dan ekosistem lingkungannya. Oleh karena itu, tujuan dari penelitian ini adalah mengidentifikasi kondisi dan nilai kesesuaian wisata, menganalisis tingkat kesediaan wisatawan, serta mengidentifikasi strategi kebijakan dalam mengembangkan konsep green tourism di Pantai Pulau Pramuka. Metode analisis data yang digunakan adalah perhitungan indeks kesesuaian wisata, analisis willingness to pay (WTP), serta MULTIPOL. Hasil penelitian menunjukkan nilai indeks kesesuaian wisata untuk kategori pantai di Pulau Pramuka termasuk dalam kelas S2 atau layak jika dijadikan sebagai kawasan rekreasi. Dengan nilai IKW pada kedua pantai sebesar 69,04% dan 71,24%. Estimasi nilai willingness to pay yang bersedia dibayarkan oleh wisatawan untuk membeli paket wisata adalah sebesar Rp. 30.000 dengan total penerimaan tertinggi yang didapatkan oleh Pulau Pramuka sebesar Rp. 693.810.000. Rekomendasi kebijakan dalam mendukung pengembangan konsep green tourism adalah program zero waste management dan pengembangan kualitas sumber daya manusia., Based on the 2022 Central Statistics Agency (BPS) report, the country's foreign exchange earnings from the tourism sector amounted to 4,26 milion US$. This value makes this sector ranks fourth as the highest contributor to the country's economy. One of the most visited tourist objects in 2022 is the Thousand Islands to be precise on Pramuka Island. However, it's a pity that the potential that is owned is not directly proportional to the management of natural resources and the environmental ecosystem. Therefore, the purpose of this study is to identify the conditions and value of tourism suitability, analyze the level of tourist willingness, and identify policy strategies in developing the concept of green tourism on Pramuka Island Beach. The data analysis method used is the calculation of the tourism suitability index, willingness to pay (WTP) analysis, and MULTIPOL. The results showed that the value of the tourism suitability index for the beach category on Pramuka Island was included in the Masters class or feasible if used as a recreation area. With IKW values on both coasts of 69,04% and 71,24%. The estimated willingness to pay value that is willing to be paid by tourists to buy tour packages is 30,000 IDR with the highest total revenue received by Pramuka Island of 693,810,000 IDR. Policy recommendations in supporting the development of the concept of green tourism are zero waste management programs and developing the quality of human resources.
Keyword: alternative tourism, behavior patterns, strategy plans, 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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