Judul: Labour Management of Oil Palm Plantation (Elaeis guineensis Jacq.) at Negeri Lama Selatan Estate, PT Hari Sawit Jaya, Labuhanbatu, North Sumatera.
Abstrak: Pengelolaan tenaga kerja yang baik merupakan salah satu kunci keberhasilan perkebunan kelapa sawit. Kegiatan magang dilakukan mulai bulan Januari hingga bulan Mei 2022 di PT Hari Sawit Jaya, Labuhanbatu, Sumatera Utara. Kegiatan magang dilakukan secara langsung sebagai pekerja harian lepas (PHL), pendamping mandor, dan pendamping asisten untuk mempelajari aspek teknis dan aspek manajerial di kebun. Manajemen tenaga kerja merupakan aspek khusus yang diamati dalam kegiatan magang. Hal yang diamati dalam aspek khusus meliputi pengorganisasian tenaga kerja, prestasi kerja, disiplin dan kualitas tenaga kerja serta penerapan Indonesian Sustainable Palm Oil (ISPO) pada perkebunan terkait prinsip dan kriteria ISPO yang ke-5 tentang tanggung jawab tenaga kerja. Tenaga kerja di Kebun Negeri Lama Selatan, PT Hari Sawit Jaya terdiri dari karyawan staf dan non staf. Hasil pengamatan selama magang menunjukkan bahwa perusahaan telah melakukan sistem penerimaan kerja karyawan yang baik. Kualitas kerja pemanen umumnya sudah sesuai dengan standar perusahaan. PT Hari Sawit Jaya telah menerapkan prinsip dan kriteria ISPO ke-5 tentang tanggung jawab terhadap pekerja dengan memberikan fasilitas sarana dan prasarana untuk kesejahteraan dan kesehatan pekerja serta menyediakan alat pelindung diri (APD) untuk keselamatan kerja. Kata kunci : ISPO, kualitas kerja, prestasi kerja, Good fieldworker management is one of the key successes of palm plantations. The internship was held from January until May in PT Hari Sawit Jaya, Labuhanbatu, North Sumatra. The internship had been conducted by working directly as a daily worker, accompanying a field supervisor, and accompanying an afdeling assistant (division head) to learn technical and managerial aspects. Fieldworker management was the focus of the internship activity. The observed thing on the focus internship included fieldworker organizing, work performance, discipline and quality of work, and practice of Indonesian Sustainable Palm Oil (ISPO) in oil palm plantations to relate with the 5th principles and criteria ISPO about fieldworker responsibility. Fieldworker in Negeri Lama Estate, PT Hari Sawit Jaya categorized as staff and non-staff worker. The results showed that the company has implemented a good employee recruitment system. The harvester’s quality in PT Hari Sawit Jaya has implemented the principle and criteria of the company’s standards. PT Hari Sawit Jaya has complied with the 5th principle and criteria of ISPO about fieldworker responsibility by providing facilities and infrastructure for the prosperity and health of workers and also providing personal protective equipment (PPE) for work safety. Keywords: ISPO, quality of work, work performance.
Keyword: ISPO, quality of work, 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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