Judul: Manajemen Tenaga Kerja Panen Tanaman Kelapa Sawit (Elaeis guineensis Jacq.) di PT Perdana Intisawit Perkasa, Kebun SEI Air Hitam, Kabupaten Rokan Hulu, Riau
Abstrak: The Palm oil plantation use lot of laboursthat will influence the level of corporation expense. Human resources or harvest labour represent most factor to determine function than other resources. This apprenticeship activity took place in Sei Air Hitam Estate, Rokan Hulu Riau, from February 2012 to May 2012. The objective of this apprentice was to improve the ability, experience, work skill of student and analyzed problems of harvest labour management in Sei Air Hitam Estate. Data and information were collected with direct method to gotten primer data and indirect method to gotten secondary data. The observation collected was all managements and activites about labour harvest in Sei Air Hitam estate. The profile of worker consisted of amount, achievement, age, educational background, origin tribe, work of experience and helper amount of worker. Harvest labour needs in Sei Air Hitam estate was not enough and need to be adding immediately, this short supply of harvest worker was affected the quality of expected result. Worker’s standard output was too high and influent the work quality of worker. The achievement of worker showed that young harvester (17 – 25 years old) work better, worker with higher educational background get more achievement than other, base on work experience the long time experience of worker (>10 years) work better than other. Worker with one helper get less achievement than worker with two helpers. Sei Air Hitam harvest worker consist of 5 tribes they are: Java, Nias, Batak, Saklam, Sunda and Dayak. Nias tribe with high prediction level of harvest activity produce most amount of achievement.
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Judul: Pengelolaan Panen Kelapa Sawit (Elaeis guineensis Jacq.) di Kebun Sei Air Hitam, PT Perdana Inti Sawit Perkasa I, First Resources Ltd., Riau
Abstrak: The internship program was conducted in Sei Air Hitam Plantation, PT Perdana Inti Sawit Perkasa I, Rokan Hulu, Riau from February-June 2013. This program aims was to increase knowledge about the cultivation of oil palm, to gain work experience and skills in the management of oil palm harvesting. Harvest planning is done prior to harvest in order to run with harvesting activities optimally. Harvest planning is performed are the calculation of crop density numbers (AKP), assessed the harvest, labor, transportation, harvesting, crop rotation, harvesting facilities and infrastructures. There are some problems in harvesting procces, such as percentage of harvest that was bellow <15%, the use of personal protective equipment that were low, crop rotation that were accelerated and harvest quality is not compatible with company standard. Supervision to the harvesting activity should be improved so the quality of harvest compatible with company standard.
Keyword: Sei Air Hitam Plantation, labor, harvesting oil palm, crop density numbers

Judul: Analisis Kestabilan Model Virus Komputer dengan Infeksi Tunda dan Pemulihan Tunda.
Abstrak: In this paper, a dynamical model is composed of computer virus model that considers time delay of infection and recovery processes. Stability analysis is performed to both models, i.e. the models with and without time delay. The model without time delay has two fixed points, which one of them is stable and the other is unstable. On the other hand, the model with time delay has fixed points which one of them is spiral stable. If the value of time delay is sufficiently large, then it will imply the stability changes from spiral stable to spiral unstable and subsequently the appearance of limit-cycle and Hopf bifurcation.
Keyword: computer virus model, Hopf bifurcation, time delay