Judul: Ecotourism Development with an Approach  Resource Valuation of the Perawan Beach of Pari Island, Seribu Islands
Abstrak: Pantai Perawan merupakan salah satu objek wisata yang berada di Pulau Pari. Pengembangannya harus memperhatikan komponen yang mengutamakan unsur sumberdaya alam dengan mempertimbangkan aspek sosial, ekonomi dan budaya. Penelitian ini bertujuan untuk Penelitian ini bertujuan untuk menganalisis potensi sumberdaya dan daya dukung Pantai Perawan Pulau Pari untuk pengembangan ekowisata dengan pendekatan valuasi sumberdaya. Memberikan kuesioner merupakan cara mendapatkan data untuk mengetahui informasi nilai travel cost method dan willingness to pay. Pendekatan SWOT digunakan untuk menganalisis strategi pengelolaan. Faktor yang mempengaruhi kegiatan wisata yakni umur dan biaya perjalanan. Rataan willingness to pay sebesar Rp 15.500. Strategi yang digunakan untuk pembangunan wisata yakni dengan meningkatkan fasilitas-fasilitas wisata dan juga membuat forum musyawarah untuk pembuatan lembaga untuk meningkatkan pengembangan ekowisata.
Keyword: Perawan Beach, Swot Analysis, Travel Cost Method, Willingness to Pay

Judul: Analisis Ekonomi dan Daya Dukung Pengembangan Ekowisata Pulau Pari Kepulauan Seribu, Jakarta
Abstrak: Pari Island wich is known as research and conservation area of coral reefs by P2O LIPI, now also developed as a natural tourism area. One of the purposes of tourism development in Pari Island is to increase local economy. Most of the local people in Pari Island work in fisheries sector which now face a fish stock depletion due to the overfishing problem. Thus the tourism sector is expected to contribute to the local community income. This study was conducted to calculate the carrying capacity of Pari Island for beach and snorkeling activities, estimating the economic value of tourism in Pari Island, and the contribution of the tourism sector to local community income. Based on calculation, the value of tourism suitability index and carrying capacity of the location are in the category suitable. The economic value of tourism in Pari Island are estimated using individual travel cost method and show the results Rp 152.627.300.000,00/year. The existence of the tourism sector in Pari Island also contributed 70,12 percent to local community income. The number of economic value and tourism contribution to the local community income are indirectly indicate that tourism sector in Pari Island is important for society and the environment. Thus, tourist activity in Pari Island can be developed with limit of environmental carrying capacity.
Keyword: sustainable tourism, tourism contribution, the economic value of tourism, the environmental carrying capacity, Pari Island

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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