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.
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Judul: Manajemen Panen Kelapa Sawit (Elaeis Guineensis Jacq.) Di Mandah Estate, Pt Bhumireksa Nusasejati, Minamas Plantation, Indragiri Hilir, Riau
Abstrak: Kegiatan magang dilaksanakan di Kebun Mandah, PT Bhumireksa Nusasejati, Minamas Plantation, Kabupaten Indragiri Hilir, Provinsi Riau mulai dari bulan Februari 2015 sampai dengan Juni 2015. Kegiatan magang ini bertujuan untuk mempelajari teknik dan manajemen budidaya kelapa sawit secara umum khususnya pemanenan kelapa sawit. Kegiatan panen di Divisi I Kebun Mandah menggunakan sistem Block Harvesting System non-Division of Labour yaitu program implementasi pengerjaan kegiatan panen yang terkonsentrasi pada satu seksi yang harus diselesaikan dalam satu hari dimana penyelesaian hancak dari potong buah dan kutip brondolan dilakukan sepenuhnya oleh satu pemanen. Secara umum kualitas mutu buah dan mutu hanca di Kebun Mandah sudah baik dengan rasio kehilangan hasil sudah di bawah standar yang telah ditetapkan oleh perusahaan dan rata-rata kematangan buah sudah mencapai standar 95%. Aspek panen yang menjadi kendala yaitu unit angkut buah yang lambat dalam pengangkutan ke pabrik kelapa sawit menyebabkan banyak buah menginap di lapangan.
Keyword: kelapa sawit, manajemen panen, gambut, Kebun Mandah

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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