Judul: Manajemen Pemanenan Kelapa Sawit (Elaeis guineensis Jacq.) di Kebun Gunung Pamela PTPN III, Sumatera Utara
Abstrak: Intership program gave knowledge, skill, and experience in technical aspect of conducting of oil palm and lead of the employees management. This activity was started from February to June 2013 in Gunung Pamela Plantation PT. Perkebunan Nusantara III, North Sumatera. Observation was examined with statistical data analyse such as corelation and t-dunnet test. Harvest rotation, harvest density, management of labour, and harvesting supervision were important aspect in harvesting activity. Result of harvest density estimation analysis was not significantly different, the result of corelation to harvester quality was observe from the age harvester, work experience and education level to output of harvester (amount of palm oil fruit) was not significantly different, weak, and directional except education level that a instruct contrary. Result of t-dunnet test of work experience didn’t affect the real output of harvester. The age of harvester that less than and more than 30 years old, according to result of t-dunnet test, was not significantly different to the output. Productivity of palm oil in Gunung Pamela Plantation PT. Perkebunan Nusantara III haven’t reached to marihat standard.
Keyword: oil palm, management harvesting, Gunung Pamela Plantation

Judul: Manajemen Panen Kelapa Sawit (Elaeis guineensis Jacq.) di Kebun Adolina, PT Perkebunan Nusantara IV, Serdang Bedagai, Sumatera Utara.
Abstrak: Internship aims to improve the ability and comprehension in the management of oil palm plantation. Internship implemented in Adolina Estate, PTPN IV. In the implementation of internship, harvest management in the oil palm harvesting was accentuated to observed and studied. Observation in harvest management consists of harvest rotation, harvest density, assessed daily production, harvester requirements, criteria of ripe harvest, harvester capacity, quality fruit, and transporting the fruit to oil palm mill. Data from observation were analyzed quantitatively using the average, percentage, and standard deviation (descriptive statistics) as well as the t-student test (comparison). The results from analyzed showed that harvest management of oil palm in Adolina Estate need to be improved. It is due to harvester capacity is lower of standard company and the high production percentage of fruits have not quality. The low capacity of harvesters affect the calculation of harvester requirements and disruption of harvest rotation. Harvest rotation is disturbed affect the high production percentage of fruits have not quality. Adolina Estate has implemented assessed harvest density quite accurately to the realization of the harvest density. The accuracy of the assessed harvest density to realization of harvest density affect the accuracy of the assessed daily production as well as calculation of harvester requirements and transport harvest.
Keyword: harvester capacity, harvest management, oil palm, harvester

Judul: Metrik Einstein (Anti-) Self-Dual Berdimensi Empat dengan Metode Cartan
Abstrak: Gravitational field equation can be formulated in differential forms (differential geometry), which describes gravity as a manifestation of the curvature of space-time. Curvature of space-time is characterized by a metric that satisfies the gravitational field equation. With differential forms it can be formulated the (anti-) self-dual Einstein equation, which is a modification of the Cartan structure in (anti-) self-dual basis. Calculation of (anti-) self-dual metric with (anti-) self-dual Einstein equation is simpler than the calculation using Christoffel symbols.
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