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: 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: 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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