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INDONESIA
Physical Sciences, Life Science and Engineering
Published by Indonesian Journal Publisher
ISSN : -     EISSN : 30319021     DOI : https://doi.org.10.47134/pslse
Core Subject : Humanities, Science, Social, Engineering,
Humanities Engineering Physics Social Sciences
Explore the Physical Sciences, Life Science and Engineering. This section accommodates research papers that aim to present the practical aspects of certain theoretical hypotheses reflected through empirical approach to problemsolving, systematic methodology that guarantee the validity of research results, expert opinions, sophisticated utilization of devices in a variety of field of studies such as in physics, geography and engineering. Focus and Scope: Remote Sensing, Chemistry, Cartography, Geographic Information Systems, Astrophysics, Nuclear Physics, Applied Physics, Geophysics, Applied Mathematics, Environmental Science, Geology, Astronomy, Earth, Science, Aerospace, Computer Science, Applied Engineering and Material Science.
Arjuna Subject : Ilmu Sosial - Ilmu Sosial (Lain-Lain)
Articles 76 Documents
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Sistem Perawatan Alat Overhead Crane Dengan Metode Reliability Centered Maintenance (RCM) II dan Age Replacement Ferdiansyah Wendyantoro; Indah Apriliana Sari Wulandari
Physical Sciences, Life Science and Engineering Vol. 3 No. 2 (2026): March
Publisher : Indonesian Journal Publisher

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.47134/pslse.v3i2.695

Abstract

Equipment maintenance is very important to ensure that the equipment operates properly within a certain period of time. PT. XYZ, which is engaged in the shipping industry, uses a demag type overhead crane with a capacity of 5 tons in its production process. This study aims to evaluate the reliability level of overhead cranes in existing conditions by calculating the reliability value. In addition, this study also aims to determine the critical component replacement interval appropriately so that replacement is carried out before downtime occurs. The results of the study identified three critical components, namely Contactor, Photoelectric Sensor, and Motor Hoist, with MTTR values ​​of 3.65667 hours, 4.15333 hours, and 1.1546 hours, respectively. The application of the age replacement method showed an increase in reliability: Contactor 39%, Photoelectric Sensor 40%, and Motor Hoist 83%. The recommended component replacement interval is every 11 days to reduce downtime and increase operational efficiency.
Pengendalian Kualitas Produk Oven Tangkring Menggunakan Metode Seven Quality Tools dan Kaizen Ryan Ardiansyah; Atikha Sidhi Cahyana
Physical Sciences, Life Science and Engineering Vol. 3 No. 2 (2026): March
Publisher : Indonesian Journal Publisher

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.47134/pslse.v3i2.696

Abstract

UKM ANDA, a manufacturing company engaged in the field of kitchen equipment, especially ovens. Experiencing a problem, namely high product defects reaching 3-5% per month. The purpose of this study is to identify the types of defects in the product, find the causes of product defects, and provide suggestions for improvement to reduce product defects. Using the seven quality tools and kaizen methods, it shows the types of defects that occur, namely dent defects of 89 products (40%), dimensional defects of 77 products (34%), and stand defects of 59 products (26%). Human factors (carelessness), methods (unclear work instructions), machines (blunt cutting tools), materials (poor raw materials), and the environment (messy work area) contribute to product defects. Proposed improvements include providing briefings, creating appropriate work guides for the production process, checking raw materials, periodic maintenance, and arranging work tools.
Perencanaan Ulang Tata Letak Area Produksi Mesin Packaging Menggunakan Metode Activity Relationship Chart dan Corelap Fahmi Amirulloh; Atikha Sidhi Cahyana
Physical Sciences, Life Science and Engineering Vol. 3 No. 2 (2026): March
Publisher : Indonesian Journal Publisher

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.47134/pslse.v3i2.697

Abstract

PT. Nobelindo is a company specializing in the manufacturing of processing and packaging machines tailored to customer needs. To meet customer demands, efficient processing equipment is essential to support material handling. One way to enhance material handling is through facility layout planning. The current facility layout is considered inefficient, as the distance workers must travel to the warehouse is too far, requiring each department to make 2-4 trips per day, with a total material handling distance of 110 meters. This study aims to redesign the facility layout to optimize the production flow by considering the flow of production and distances between production areas to achieve better efficiency using the Activity Relationship Chart and Corelap methods. The results show a total material handling distance of 59 meters, achieving an efficiency improvement of 46.3%. Therefore, this redesigned facility layout can serve as an alternative for PT. Nobelindo to optimize material handling processes.
Rancang Bangun Sistem Water Reclaim Sederhana Berbasis Koagulasi, Filtrasi Multilapis, dan Disinfeksi Ultraviolet untuk Pengolahan Air Limbah Rumah Tangga (Greywater) Mahfuddin Zuhri; Nanda Fitri Hartanti; Ardian Arif Setiawan; Aep Setiawan
Physical Sciences, Life Science and Engineering Vol. 3 No. 3 (2026): June
Publisher : Indonesian Journal Publisher

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.47134/pslse.v3i3.752

Abstract

Penelitian ini bertujuan merancang dan mengevaluasi sistem water reclaim skala rumah tangga menggunakan kombinasi proses koagulasi, filtrasi multistage, dan disinfeksi sinar ultraviolet (UV). Sistem pengolahan terdiri atas proses koagulasi menggunakan tawas (KAl(SO₄)₂·12H₂O), filtrasi multistage yang memanfaatkan media batu gravel, pasir kuarsa, zeolit, karbon aktif, dan serat loofah, serta disinfeksi menggunakan lampu UV sebagai tahap akhir pengolahan. Kinerja sistem dievaluasi berdasarkan parameter organoleptik, derajat keasaman (pH), Total Suspended Solids (TSS), Total Dissolved Solids (TDS), Dissolved Oxygen (DO), kadar surfaktan, serta parameter kualitas air lainnya. Hasil penelitian menunjukkan bahwa sistem yang dikembangkan mampu meningkatkan kualitas greywater melalui penurunan kekeruhan, padatan tersuspensi, dan kontaminan, serta menghasilkan air dengan karakteristik fisika dan kimia yang lebih baik. Kombinasi koagulasi, filtrasi multistage, dan disinfeksi UV memberikan solusi yang sederhana, ekonomis, dan ramah lingkungan untuk pemanfaatan kembali greywater pada kebutuhan nonpotabel, seperti pencucian kendaraan, penyiraman tanaman, dan pembersihan area luar ruangan, sehingga berpotensi mendukung konservasi sumber daya air secara berkelanjutan.
Study Al Doping Effect on the Properties of Sol-Gel Spin-Coated SnO₂ Thin Films Holya A. Lafta
Physical Sciences, Life Science and Engineering Vol. 3 No. 3 (2026): June
Publisher : Indonesian Journal Publisher

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.47134/pslse.v3i3.786

Abstract

Sol-gel spin coating was used to prepared thin films of SnO₂ doping (1,2 and 5)% of Al on glass substrates, starting with dissolving Tin (II) chloride dehydrate as precursor in ethanol with stabilizing agent (HCl) to prevent hydrolysis and Aluminum nitrate nonahydrate [Al(NO₃)₃·9H₂O] as the dopant source to obtain Al content. The films was deposited by spin coating method which were annealed for an hour at 500 °C to enhance crystallinity. UV-visible spectroscopy and X-ray diffraction (XRD) were used to analyze optical and structural characteristics of the produced films. A single-phase tetragonal rutile structure development with a preferred (110) crystallographic plane orientation was confirmed by XRD film analysis .With Al content increasing, a reduction in crystallite size as well as an increase in lattice strain and dislocation density were observed, suggesting increased structural disorder. The optical assessments revealed a clear red shift in the absorption threshold concurrent with an increase in Al content while a consistent reduction in the optical energy gap from 3.98 eV for pure SnO₂ film to 3.89, 3.66, and 3.52 eV with increasing Al content. The results show a strong a connection between structural and optical properties by synchronous decrease in crystallite size and optical band gap.
Synthesis of TiO₂@PEG Thin Film Nanoparticles and Testing for Treatment of Cell Lines via Exposure to a Near-Infrared Laser Rusul Mohammed
Physical Sciences, Life Science and Engineering Vol. 3 No. 3 (2026): June
Publisher : Indonesian Journal Publisher

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.47134/pslse.v3i3.789

Abstract

The production of core-shell nanomaterials is important in medical applications. This study demonstrates the synthesis of TiO2 as core and PEG-400 as shell nanoparticles, they were synthesized using the Stöber method in two steps to control their size and the possibility of changing their characteristics. The prepared solution was deposited on a glass substrate to obtain its TiO₂@PEG core shell nanoparticles thin film. XRD result confirm that TiO₂ used had anatase phase with dominate peaks at (101), and TiO₂@PEG core shell nanoparticles thin film had a broad diffraction peak at 15–25°. The presence of this broad peak is indicative of the successful incorporation of PEG-400 as a coating layer surrounding the core TiO₂. The absorption spectra in the ultraviolet and visible light regions for TiO2 solution that had a broadening of the absorption spectrum in 290-350 nm that related to spherical monodisperse. TiO2@PEG core shell nanoparticles thin film had a broadening of the absorption spectrum at 300-450 nm with an average particle size of 50 nm and spherical shapes. TiO2@PEG-400 CSNPs had high suspension stability. TiO2@PEG core shell nanoparticles thin film was tested in MDA-MB-231 cell lines and HBL-100 cell lines using MTT assay. The results indicated that the cell lines exposure to TiO2@PEG-400 core shell nanoparticles reduced cancer cell viability and the cell inhibition rate increased with the applied near-Infrared Laser (NIR laser).

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