Judul: Efektivitas Pancing Terhadap Hasil Tangkapan Tuna Disekitar Rumpon yang Didaratkan di PPN Palabuhanratu Sukabumi
Abstrak: Research on the rumpon fishing for tuna catches was conducted in Palabuhanratu Sukabumi. Line fishing with rumpon (FADs) comprises with five type of fishing (trolling line, taber,coping,jerigen and fishing line with kites) which operate around rumpon. The objectives of the research are to determine the percentage composition of the tuna caught operated with rumpon and to examine the effectiveness of line fishing using rumpon in catching tuna. The survey method was used in the research and data collection is carried out by using purposive sampling. The results of this study indicate that catch of line fishing with rumpon consists of skipjack, yellowfin and bigeye with the total 24% which landed at PPN Palabuhanratu. The proportion of skipjack is 40.6%, yellowfin 37.6% and bigeye 21.6%. Effectiveness of line fishing with rumpon was obtained of 24% with the highest effectiveness of tuna catch in August around 58% and the lowest value in December at 9%.
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Judul: Produktivitas Armada Penangkapan Pancing di Sekitar Rumpon, Palabuhanratu Jawa Barat
Abstrak: Fishing line with rumpon is the most widely used by fishermen in Palabuhanratu water’s, Sukabumi. This research aims to estimated productivity of fishing line with rumpon in different season, to figure out fishing ground, and total catch of training vessel PSP 01 operated in PPN Palabuhanratu water’s. Surveys method was used in the research and collected the primer and secondary data. The analysis of catch per unit effort (CPUE) was estimated to determine the position of fishing ground of tuna. Result of the research showed that off season during December to February, normal season in March until May, October until November, and peak season from June to September. The productivity of fishing line was increased from off season to peak season. The average CPUE from 2007 to 2011 comprises of 419,88 kg/trip (off season), 582,07 kg/trip (normal season I), 734,47 kg/trip (normal season II), and 818,90 kg/trip (peak season) respectively. The fishing ground of training vessel PSP 01 is located at the southern water’s of Palabuhanratu (07035’188 – 07059’874 South dan 106018’096 – 106025’112 East).
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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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