Judul: Analisis Kelayakan Usaha Perkebunan Kelapa Sawit PT. Terang Inti Seraya di Provinsi Riau
Abstrak: Palm Oil is one of agriculture comodity that has a high demand. Palm oil factories in Riau still have a defisit on its raw material to be processed. The deficit of raw materials could be a business opportunity for oil palm plantations. That opportunity to fulfill the raw material needs was taken by PT. Terang Inti Seraya, Riau. The purpose of this research is to analyze the feasibility of oil palm plantation business in PT. Terang Inti Seraya. The research was conducted at the office of PT Terang Inti Seraya at Pekanbaru and Palm Oil Plantation at Tenayan, Buluh Nipis, and Ujung Batu Rokan. Data analysis method which is used on this research is qualitative and quantitative method. Qualitative analysis is used to analyze feasibility based on non-financial aspect such as market aspect, technical aspect, management and law aspect, and also social and environmental aspect. Quantitative analysis is used to analyze feasibility of financial aspect based on investment criteria and switching value analysis. The result of this feasibility analysis shows that palm oil plantation business in PT. Terang Inti Seraya is feasible to run.
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Judul: Analisis Produksi Kelapa Sawit ( Elaeis guineensis Jacq.) di Kebun Buatan PT Inti Indosawit Subur, Kabupaten Pelalawan, Provinsi Riau
Abstrak: The internship program has been conducted at PT. Inti Indosawit Subur, Buatan Estate, Pelalawan, Riau from February 13 to May 13 2012. The purpose of this internship program is to learn oil palm cultivation and specifically analyzes the factors that influence the production of palm oil. The data to be collected consist of primary and secondary data. Buatan estate generally have applied the technique of oil palm cultivation in accordance with standard operating procedures that have been established by the company. Based on double linear regression analysis, FFB (Fresh Fruit Bunch) production is influenced by the number of harvesting working days and the amount of harvester output. The coefficient of determination (R2) generated that variables of FFB production as dependent variable can be describe by the independent variables (harvesting working days, amount of harvester output and rainfall) for 98.3%. The main problem is the decrease in crop productivity for plants older than 22 years as the age of the plant is already above the maximum age of the average productivity of oil palm.
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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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