Judul: Pengelolaan bahan baku dan pengolahan ubikayu di perkebunan PT Pematang Agri Lestari dan pabrik tapioka PT Sinar Pematang Mulia I, Lampung
Abstrak: This internship in general activities aimed at improving professional skills in students understand and work processes significantly, enhance technical capabilities, managerial, and analytical activities in the field (for a commodity with a commodity plus cassava and oil palm). In particular, this internship activities aim to: (1) study the management of raw materials and processing of cassava in PT Pematang Agri Lestari (PT PAL) and PT Sinar Pematang Mulia I (PT SPM I), Lampung, (2) study the implementation of cassava cultivation techniques in company and the farmers, and (3) analyze the cassava farming. The location of the implementation of an internship that is in PT PAL (plantation) and tapioca factory of PT SPM I, Sub Way Serdang, Mesuji District, Lampung Province.Implementation of internships conducted from February 15th until June 18th 2010. During an internship at PT PAL, the authors placed as a companion foreman, assistant superintendent partnerships, and cohead of the division I (cassava and palm). At the time of internship in PT SPM I, the author placed on the quality control (QC). Primary data collected during the internship activities are all matters relating to: (1) management of raw materials (2) the cultivation techniques; (3) analysis of farming, and the (4) processing at the plant. The primary data collected through observation, interviews, and discussions. Sample cultivation techniques and analysis of data collected from 20 people farming farmer partners. Secondary data collected from data held by the companies and literature studies. The data examined were: (1) geographical location and administrative (2) climatic and soil conditions, (3) organizational structure, and (4) employment.
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Judul: Manajemen Panen Kelapa Sawit (Elaeis Guineensis Jacq.) di Kebun Tambusai PT. Panca Surya Agrindo, First Resources Ltd., Kec. Tambusai, Kabupaten Rokan Hulu, Riau.
Abstrak: The purpose of this internship program was to improve technical and managerial skills on oil palm plantation. The internship was conducted at Tambusai Estate, PT. Panca Surya Agrindo, First Resources Ltd; Tambusai, Rokan Hulu, Riau on 13 February to 12 May 2012. Primary data from field observations devoted to the preparation of fruit harvesting, and other technical and managerial aspects of harvesting, harvesting system of premiums, and production of fresh fruit bunches. Secondary data were obtained from the archives of the company for 5 years. The data were analized by using deskriptive method, percentage (%) and average value. The data and fild observations indicated that there were harvesting management problem needed to be improved. The problem related with the back number of harvester, caused too high harvest capacity of each harvester, and the less accurate of yield prediction. Asno the consequency of the problem was the late of transportation to the mill and the processing of FFB at the mill
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Judul: Dynamical System of Hepatitis B in Three Groups with Vaccination
Abstrak: The aim of this study is to modify the hepatitis B transmission model in three age groups involving vaccination from the model conducted by Zhoe and Zhang.The method used is to analyze the stability of the fixed point and its basic reproduction number (R_0). Performed stability analysis and numerical simulation to see population dynamics. Next, a sensitivity analysis of the parameters was carried out to see its effect on R_0. From the analysis obtained two fixed points, namely non-endemic and endemic fixed points. Non-endemic fixed points are locally asymptotically stable if R_0 <1 Meanwhile, the endemic fixed point is locally asymptotically stable if R_0 > 1. Hepatitis vaccination affects the number of susceptible population, because the more successful the vaccination, the smaller the number of susceptible populations so that the smaller the population will be infected.
Keyword: Dynamic, Hepatitis B, Vaccine, Mathematical model