Judul: Pengaruh Kerusakan Buah Kelapa Sawit terhadap Kandungan Free Fatty Acid dan Rendemen CPO di Kebun Talisayan 1 Berau
Abstrak: The objective of this internship specifically was to study the factors that affect the quality of CPO. The internship was conducted in Talisayan 1 Estate PT Tanjung Buyu Perkasa Plantation, Berau, East Kalimantan from February to June 2013. Problem analysis using Ishikawa diagram and linear regression by making poor quality fruit, fruit “restan” (leftover), injury fruit, and the loss of crops as factors that cause of problems, both the activity of harvesting until transporting the yields. The analysis show that CPO degradation probelms one of which can be seen from the low rendement of palm oil (CPO) and high Free Fatty Acid (FFA) CPO. Low oilrendementcausedbypoorfruit qualityandyieldloss. High FFA CPO causedbypoorqualityfruit, leftoverfruit, andfruitinjury.
Keyword: rendement, palm oil, harvest, FFA, CPO

Judul: Manajemen Panen Kelapa Sawit : Hubungan Mutu Buah dan Curah Hujan Terhadap Kandungan Asam Lemak Bebas di Kebun Rambutan PTPN III Sumatera Utara
Abstrak: Internship activitywas conducted in order to increase knowledge, skills, and experience in the oil plantation, as well as to study relationship between harvest management and content of free fatty acid (FFA). Activities were carried out from February to June 2014 at the Rambutan Estate of PTPN III in North Sumatera Province. Effects of fruit quality and precipitation on FFA were analyzed by using multiple linier regression models. Results showed that FFA content significantly affected by percentage of delayed-processed bunches (restan) (P value = 0.087). Increasing level of delayed-processed bunches at rate of 1% (kg) increased FFA level of 0.001%. Percentage of over ripe, unripe and under ripe fruits and precipitation did not significantly affect FFA level. This research implies that control of delayed-processed bunch is important to maintain level of FFA.
Keyword: Bogor Agricultural University (IPB), restan-fruit, general linier model, free fatty acid, crude palm oil

Judul: A Continuous Vaccination Strategy in the SVIR Epidemic Model
Abstrak: Vaccination is conducted to minimize the spread of a disease. The vaccination is usually done several times within a fixed time interval. In the SVIR model, it is assumed that individuals do not get immediate immunity following a vaccination program. So according to process of vaccination on SVIR model, there are two strategies, i.e. the continuous vaccination strategy (CVS) and the pulse vaccination strategy (PVS). In this study, only the CVS strategy in epidemic model SVIR is considered. Results of the study indicate that dynamics of the CVS system depends on the basic reproductive number. If the basic reproductive number is less than one, then the disease-free fixed point is asymptotically stable. It means that the disease will eventually disappear from the population. Conversely, if the basic reproductive number is greater than one, then the endemic fixed point is asymptotically stable, which means that the disease will remain exist in the population. Simulation result shows that the vaccination would minimize the spread of disease by reducing the basic reproductive number. If the time for the vaccinated recipients to obtain the immunity, as well as a possibility of vaccinated recipients to be infected are neglected, then the disease will be eradicated. This condition is called an over-evaluating effect of vaccination.
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