Judul: Manajemen Pembibitan Tanaman Kelapa Sawit (Elaeis guineensis Jacq.) di Kebun Padang Halaban PT SMART Tbk, Sumatera Utara
Abstrak: Internship have been done at Padang Halaban Estate PT SMART Tbk, North Sumatera. Internship carried out for 4 months starting from February 2014 until June 2014. The objective of internship are to improve knowledge and skills in analyzing and understanding the various problems in the process of oil palm nurseries, technical aspects and managerial of oil palm plantation. Oil palm nursery at Padang Halaban Estate of PT SMART Tbk used ramet or zygotic embryos Dami Mas variety as a source for seedling. After 4 month observation, Dami Mas’s seedlings have the highest percentage of survival rate compared to PPKS variety. At pre nursery, it was 98.21 %. This is the indicator that Dami Mas’s seedling have a good quality as a seedling source. The vegetative growth seedlings of ramet at main nursery have average of high, diameter of stem, and number of midrib are higher than growth standard of companies seedling or standard of PPKS seedling. The result of seedling selection showed that abnormal seedlings were selected as much as 14.89% in main nursery.
Keyword: Bogor Agricultural University (IPB), Dami Mas, selection, ramet, nursery, Elaeis guineensis

Judul: Manajemen Panen Kelapa Sawit (Elaeis guineensis Jacq.) di Kebun Adolina PTPN IV Persero, Serdang Bedagai, Sumatera Utara
Abstrak: Internship program provides knowledge and skills in aspects agronomy of oil palm, both technical and managerial. This internship activities were started from February 2014 to June 2014 at Adolina Estate PTPN IV Persero, Serdang Bedagai, North Sumatera. Intership activities included, worker in the field as laborer, as supervisor and field manager. Management of harvesting included harvester, harvest capacity, harvest quality, and production as well as productivity of the palm. Secondary data were collected form literature and field devision archives such as monthly and annuals reports, as well as documentation of the field activities. Generally the needs of the harvester in Adolina Estate has been sufficient, but the quality and capacity of the harvest still low. Ripe fruits were not harvested and there were still many loosed fruits which has not been collected in the field. The production and productivity of palm per year of transplanting is not based on target. Better quality harvester and more intensive control by supervisor will improve quality and quantity of harvest.
Keyword: Bogor Agricultural University (IPB), oil palm., harvest management, Adolina Estate

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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