Judul: Field Work Management of Oil Palm Plantation (Elaeis guineensis Jacq.) at Aek Nabara Estate, PT Supra Matra Abadi, North Sumatera
Abstrak: Pengelolaan tenaga kerja perkebunan kelapa sawit merupakan upaya untuk mencapai indikator Indonesian Sustainable Palm Oil (ISPO) prinsip tanggung jawab terhadap tenaga kerja. Kegiatan magang di kebun Aek Nabara PT Supra Matra Abadi bertujuan meningkatkan kemampuan kerja secara teknis dan manajerial, serta mempelajari manajemen tenaga kerja perkebunan skala besar. Kegiatan magang dilaksanakan pada bulan Januari hingga Mei 2021. Metode yang digunakan adalah metode langsung (data primer) dan tidak langsung (data sekunder). Pengamatan menunjukan hasil pengorganisasian tenaga kerja yang cukup baik, namun kurang efektif karena rasio pekerja 0,10 > budget 0,09 dan indeks tenaga kerja 0,10. Prestasi tenaga kerja panen dan pupuk sangat baik dengan nilai kesesuaian 100%, sedangkan tenaga kerja semprot kurang baik dengan nilai kesesuaian 55,56%. Tingkat disiplin dan kualitas tenaga kerja di kebun Aek nabara dinilai rendah. Ketepatan taksasi yang dilakukan sebesar 93,50% dengan varian diatas 5% menunjukan taksasi yang dilakukan kurang efektif. PT Supra Matra Abadi sudah menjalankan manajemen tenaga kerja sesuai dengan prinsip ISPO yang ditetapkan., Management of the workforce in oil palm plantations is an effort to achieve the Indonesian Sustainable Palm Oil (ISPO) indicator of the principle of responsibility for the workforce. The internship activity at PT Supra Matra Abadi's Aek Nabara plantation aims to improve technical and managerial work skills, as well as learn about the management of large-scale plantation workers. Internship activities are carried out from January to May 2021. The method used is the direct method (primary data) and indirect method (secondary data). Observations show that the results of labor organization are quite good, but less effective because the ratio of workers is 0.10 > budget is 0.09 and the labor index is 0.10. The performance of harvesting and fertilizer workers is very good with a suitability value of 100%, while the spray labor is not very good with a suitability value of 55.56%. The level of discipline and quality of the workforce in the Aek Nabara plantation is considered low. The accuracy of the taxation carried out was 93.50% with a variance above 5% indicating that the taxation carried out was less effective. PT Supra Matra Abadi has implemented workforce management by the established ISPO principles.
Keyword: ISPO, losses, organization, work discipline and work performance

Judul: Labour Management of Oil Palm Plantation (Elaeis guineensis Jacq.) at Buatan Estate, PT Inti Indosawit Subur, Pelalawan, Riau
Abstrak: Salah satu kunci sukses dalam pengelolaan perkebunan kelapa sawit adalah penanganan ketenagakerjaan dengan baik. Kegiatan magang dilaksanakan selama empat bulan dari 18 Januari 2021 hingga 12 Mei 2021 di Kebun Buatan, PT Inti Indosawit Subur, Pelalawan, Riau. Kegiatan magang dilakukan dengan bekerja secara langsung sebagai pekerja harian lepas (PHL), pendamping mandor, dan pendamping asisten untuk mempelajari aspek teknis dan manajerial. Manajemen tenaga kerja menjadi aspek khusus yang diamati dalam kegiatan magang. Pengelolaan tenaga kerja yang baik dapat mempengaruhi pencapaian tujuan dan target kerja perusahaan. Pengelolaan tenaga kerja di Kebun Buatan, PT Inti Indosawit Subur meliputi staf dan non staf. Keseluruhan tenaga kerja di Kebun Buatan PT IIS berjumlah 529 orang dengan luas areal yang diusahakan 2515 ha sehingga indeks tenaga kerja di Kebun Buatan adalah 0,203. Hasil magang menunjukkan bahwa perusahaan telah memiliki prosedur penerimaan karyawan dan sistem pengupahan yang baku. Prestasi kerja panen dan pupuk sudah baik dengan ketercapaian basis panen mencapai 110,5% dan pupuk mencapai 100,8%. Permasalahan yang terjadi di Afdeling III Kebun Buatan yakni tingkat kehadiran pekerja yang rendah, kualitas kerja panen dan pemeliharaan yang belum sesuai standar, serta prasarana yang masih perlu diperbaiki. Pengelolaan tenaga kerja PT Inti Indosawit Subur telah menerapkan prinsip ISPO ke-5 diantaranya melalui pemberian fasilitas untuk kesejahteraan pekerja serta keselamatan dan kesehatan kerja., One of the key success in oil palm management is to handle labours properly. The internship was held from 18th January 2021 until 12th Mei 2021 in Buatan Estate, PT Inti Indosawit Subur, Pelalawan, Riau. The internship had been conducted by working directly as daily worker, accompanying field supervisor, and accompanying afdeling assistant (division head) to learn technical and managerial aspects. Field worker management was the focus on internship activity. Good management of field worker can affect the achievement of company goals and work targets. Field worker management in Buatan Estate, PT Inti Indosawit Subur categorized as staff and non-staff workers. The total workforce in Buatan Estate PT IIS is 529 people with managed as huge as 2515 ha, indicating the labor index in Buatan Estate is 0.203. Internship results show that the company already has a standard employee recruitment procedure and remuneration system. Harvest and fertilizer work performance is good with the achievement of the harvest base reaching 110.5% and fertilizer reaching 100.8%. Problems that occur in Afdeling III Buatan Estate are low worker attendance, the worker performance in terms of harvesting quality and maintenance standard, and improving infrastructure. Labour management in PT Inti Indosawit Subur has applied the 5th ISPO principle, including provision of facilities for the welfare of workers as well as occupational safety and health.
Keyword: attendance rate, ISPO, sustainable, worker discipline, worker performance

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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