Judul: Manajemen panen kelapa sawit (Elaeis guineensis Jacq.) pada lahan gambut di Kebun Mandah, PT. Bhumireksa Nusa Sejati, Minamas Plantation, Kabupaten Indragiri Hilir, Provinsi Riau
Abstrak: The harvest management at peatland oil palm plantation is one of the most important factors to reach high fresh fruit bunch (ffb) production. The purpose of this apprenticeship activity was to improve knowledge, ability and work skill of student in order to comprehend in harvest management at oil palm plantation. This apprenticeship took place in Mandah Estate, PT. Bhumireksa Nusasejati, Minamas Plantation, Indragiri Hilir, Riau, from February 2012 to May 2012. Data and information were collected with direct methode and indirect methode. Direct methode was collected by observation and discussion with harvester, foreman, and field assistant. Indirect methode was collected from company data and company record. The harvest activity in Mandah Estate divition 5, uses Block Harvesting System non-Division Of Labour (BHS non-DOL). This system was implementation programs of harvest activity that focus to finished harvest in one section a day. The result of harvest activity in Mandah Estate divition 5 runs well, a shown by good field quality with 0.2 lost fruit per plant, 95.3 % of ripe fruits and 0% unripe fruit. The most obstacle of harvest aspec in Mandah Estate was the transport unit of ffb very slow and caused the uncarry of ffb.
Keyword: 

Judul: Analisis produksi kelapa sawit (Elaeis guineensis Jacq.) pada Lahan Gambut di Kebun Mandah Estate, PT Bhumireksa NusaSejati, Minamas Plantation, Indragiri Hilir, Riau.
Abstrak: The internship program has been conducted at PT Bhumireksa Nusa Sejati, Minamas Plantation, Indragiri Hilir, Riau from February 13 to May 13 2012. The purpose of this internship program is to learn oil palm cultivation and specifically analyzes the factors that influence the production of palm oil. The data to be collected consist of primary and secondary data. Mandah Estate has reached a high production and has exceeded its specified company targets and successively increased production from year to year. From five estates in PT Bhumireksa Nusa Sejati, Mandah Estate which has an average peak production of 57.54 tonnes/ha/year. Management of oil palm plantations on peatlands has a different management technique on soil minerals. There a several major factors that can effects a crop production is age of plant, disease, rainfall, soil/land, harvesting, and water management.
Keyword: 

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.
Keyword: