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: Pengelolaan manajemen ketenagakerjaan menjadi salah satu kunci utama keberhasilan dalam mengelola perkebunan kelapa sawit. Kegiatan magang dilaksanakan di PT. Inti Indosawit Subur, Kabupaten Pelalawan, Riau yang dilaksanakan pada bulan Januari hingga bulan Mei 2023. Kegiatan magang dilaksanakan secara langsung di lapangan sebagai pekerja harian lepas (PHL), pendamping mandor, dan pendamping asisten untuk mempelajari aspek teknis dan manajerial. Manajemen tenaga kerja menjadi salah satu aspek khusus yang diamati penulis dalam kegiatan magang berlangsung. Dalam perusahaan perkebunan, tenaga kerja panen menjadi faktor utama yang dapat menentukan kualitas serta kuantitas produksi yang diperoleh perusahaan perkebunan. Aspek khusus yang diamati yakni adanya pengorganisasian tenaga kerja, prestasi kerja, disiplin dan kualitas kerja dan penerapan Indonesian Sustainable Palm Oil (ISPO). Perusahaan menerapkan prinsip dan kriteria ISPO dalam perkebunan yakni pada nomor 5 tentang tanggung jawab tenaga kerja. PT. Inti Indosawit Subur terdiri dari karyawan staf dan non staf. Tingkat kehadiran di Afdeling 1 sudah memenuhi standar dan kualitas kerja panen. Pengelola kebun memberikan sistem pengupahan bukan hanya berupa uang namun juga dalam berupa bahan baku. Perusahaan kebun menyediakan alat pelindung diri (APD) layak pakai dan fasilitas sarana dan prasarana untuk kesejahteraan dan Kesehatan pekerja., Management employment be one key main success in manage plantation coconut palm. Activity apprenticeship carried out at PT. Inti Indosawit Subur, District Pelalawan, Riau which was held in the month January until in May 2023. Activities apprenticeship held in a manner right on the field as worker daily freelance (PHL), companion the foreman, and the companion assistant. For learn aspect technical and managerial. Management power work be one aspect specifically observed writer in activity apprenticeship going on. In company plantation, power Work harvest become factor main can determine quality as well as quantity obtained production company plantation. Aspect specifically observed ie exists organizing power work, achievement work, discipline and quality work, and implementation of Indonesian Sustainable Palm Oil (ISPO). The company applies ISPO principles and criteria in plantation namely in number 5 about not quite enough answer power work. PT. Inti Indosawit Subur Fertile consists from employee staff and non staff. The level of attendance in Afdeling 1 has fulfil standard of quality Work harvest. Manager garden provide a reward system No only in the form of money but also in form material raw. Garden company provide tool protector (PPE) is appropriate use and facilities facilities and infrastructure For worker welfare and health.
Keyword: attendance rate, ISPO, work performance, work quality

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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