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: 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: Mathematical model of Hematopoietic Stem Cell in Chronic Myelogenous Leukemia with and without Therapy
Abstrak: Leukemia or blood cancer is a diverse group of neoplastic disease, characterized by the multiplication of abnormal leukocytes or malignant transformation of blood-forming cells in bone marrow and lymphoid tissues. One of the most common types of leukemia is Chronic Myelogenous Leukemia (CML), which is usually diagnosed by the presence of certain chromosomal abnormalities, the so-called Philadelphia chromosome (Ph). One of the treatments of CML is Granulocyte Colony-Stimulating Factor (G-CSF). In this paper, we discuss two Hematopoietic Stem Cell (HSC) models, i.e. HSC without treatment and HSC with G-CSF treatment. The model of HSC without treatment included three equations representing the dynamics of HSC, leukocyte and platelet. Whereas, the model of HSC with G-CSF treatment includes the previous three equations and adds two more equations representing G-CSF injection and G-CSF circulation. The stability behavior of the system approaching the equilibrium points in the simulation study is carried out using Mathematica 7.0. The simulation results show that the G-CSF treatment can successfully decrease the number of HSC, which means reducing the CML.
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