Judul: Manajemen Penunasan Kelapa Sawit (Elaeis guineensis Jacq.) DI Kebun Adolina PTPN IV, Serdang Bedagai, Sumatera Utara
Abstrak: This internship activities were carried out at the Adolina Plantation, PTPN IV, Serdang Bedagai, North Sumatera from February 2014 until June 2014. Internship activity aims to improve knowledge, skills and competence in field work and management, specially on prunning. Observations were conducted on the system and technique of prunning the number of retained leaf frond, number of male and, female flowers, and bunches of fruit per palm and prunning payment system. Data processing method used is quantitative statistical analysis, qualitative analysis and descriptive analysis according to the characteristics of the data obtained, and the results will be compared with literature and standard operational procedure (SOP) of the company. The sprouting adopted by the employee is not in accordance with Gardens Adolina PTPN IV’s SOP. Pruning of 6 months rotation is the main cause of difficulty to achieve an appropriate number of fronds aceordy to company’s SOP. Intensive training for the workers are needed. In addition pruning technique should be applied based on the number of retained fronds on the palm
Keyword: Bogor Agricultural University (IPB), Prunning, Oil Palm, Frond Management,

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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