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The Effect of Working Hours of The Ship's Main Engine on The Temperature of The Fresh Water Cylinder Cooling System In Diesel Engines
Majalah Ilmiah Momentum
Vol 21
, No 2
(2025)
Main propulsion engines on commercial ships are generally of the diesel type, necessitating precise and stable thermal conditions for efficient operation. To ensure this thermal stability, the engine's cylinders are equipped with a dedicated freshwater cooling system. The primary objective of this study was to ascertain the correlation between fluctuating operating hours and temperature variations within the engine's cylinder cooling system. The resulting data will inform the establishment of a...
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Rancang Bangun Sistem Kemudi Rack And Pinion dan Suspensi Independent Double Wishbone Mobil Listrik Formula E Politeknik Baja Tegal
Majalah Ilmiah Momentum
Vol 21
, No 2
(2025)
Sistem Kemudi dan Suspensi merupakan komponen terpenting dalam sebuah kendaraan untuk menselaraskan, menyeimbangkan dan memaksimalkan kinerja mobil tersebut agar dapat berjalan dengan baik, aman dan nyaman. Meskupin sistem kemudi rack and pinion dan suspensi independent double wishbone sudah ada sejak lama, namun masih masih banyak yang perlu diatasi dan diinovasikan, seperti tingkat kenyamanan, responsifitas, keamanan, keterbatasan kontrol pengguna dan kesulitan untuk mengatasi rintangan yang l...
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HUMIC ACID FILTRATION EFFICIENCY OF POLYPROPYLENE-BASED ULTRAFILTRATION MEMBRANES
Jurnal Inovasi Teknik Kimia
Vol 10
, No 4
(2025)
Polypropylene (PP) membranes exhibit advantageous characteristics for filtration processes, including chemical resistance, thermal stability, hydrophobicity, low cost, and mechanical durability, making them well-suited for long-term applications in water treatment, particularly for removing organic compounds. This study aims to evaluate the performance of hollow fiber PP membranes in the ultrafiltration of humic acid solutions, serving as a model organic contaminant. The experimental setup invol...
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ANALISA PENGUJIAN KADAR NITRAT, NITRIT DAN KLORIDA PADA AIR MINERAL DENGAN METODE SPEKTROFOTOMETRI UV – VIS DAN TITRIMETRI
Jurnal Inovasi Teknik Kimia
Vol 10
, No 4
(2025)
Udara merupakan kebutuhan esensial bagi kehidupan manusia, Kualitas air minum menjadi perhatian utama dalam upaya menjaga kesehatan masyarakat. Keberadaan senyawa nitrat (NO₃⁻), nitrit (NO₂⁻), dan klorida (Cl⁻) dalam air mineral perlu dikaji mengingat potensi toksisitasnya apabila melebihi ambang batas yang ditetapkan oleh standar nasional. Penelitian ini bertujuan untuk menentukan kadar nitrat, nitrit, dan klorida dalam beberapa sampel air mineral menggunakan metode spektrofotometri UV–Vis dan...
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SYNERGISTIC INTERFACIAL CHEMISTRY OF HUMIC ACID AND ACTIVATED FLY ASH FOR HIGH-PERFORMANCE Mn²⁺ ADSORPTION
Susparini, Ninik Triayu
; Ramadhan, Alamsyah Sultan
; Aferta, Lusi
; Benu, Marlon Jusak Renaldy
; Wijayanti, Sri
; Tantowi, Ali
Jurnal Inovasi Teknik Kimia
Vol 11
, No 1
(2025)
This study developed a hybrid adsorbent derived from activated fly ash (FA) and humic acid (HA) for effective Mn²⁺ removal from aqueous solutions. Fly ash was activated using 1 M NaOH to increase its surface hydroxyl groups (≡Si–OH and ≡Al–OH) and enhance reactivity. The activated FA was then composited with HA, which contains abundant –COOH and –OH groups, forming an inorganic–organic hybrid with improved adsorption capability. The HA–FA composite with a 1:3 mass ratio exhibited the highest Mn²...
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Unveiling the Link Between Numeracy Skills and Self-Efficacy: A Study on Physics Learning Through AKM Assessments
Jurnal Penelitian Pembelajaran Fisika
Vol 16
, No 4
(2025)
This study explores the relationship between numeracy skills and self-efficacy among grade 10 students within the context of the Minimum Competency Assessment (AKM) in physics, focusing on linear and parabolic motion. Employing a quantitative descriptive design, the research involved 140 students from a public high school in Bekasi, Indonesia. Instruments included a numeracy test comprising 17 AKM-based physics questions and a self-efficacy questionnaire adapted from Bandura's framework, coverin...
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Virtual Reality Effect on Student Learning Outcomes in Nuclear Physics and Radioactivity Topics
Jurnal Penelitian Pembelajaran Fisika
Vol 16
, No 4
(2025)
Learning Nuclear Physics and Radioactivity is often perceived as difficult by student because the concepts are abstract, thus requiring learning media that can visualize these concepts more concretely. This study aims to analyze the effect of using Virtual Reality media on student’s learning outcomes in the topic of Nuclear Physics and Radioactivity. The research employed a Quasi Experimental method with a Nonequivalent Control Group Design. The subject were 33 12th grade students of Al Adzkar H...
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Utilization of Chicken Bone Waste into Calcium Fertilizer in SMK N 1 Mojosongo Boyolali
Indonesian Journal of Empowerment and Community Service
Vol 6
, No 2
(2025)
This community service activity was carried out with the aim of providing an introduction to the utilization of chicken bones waste, targeting Gen Z in this case students of SMK Negeri 1 Mojosongo, so that it can increase the motivation and interest of Gen Z in the waste management sector through interesting activities. The existing activity method is carried out by holding counseling or socialization and training. This community service activity was attended by 28 students of SMK Negeri 1 Mojos...
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Pengaruh Kompensasi Finansial, Kepuasan Kerja Dan Work-Life Balance Terhadap Loyalitas Karyawan Generasi Z
Dedi Muhammad Siddiq
; Hayundai Aulia
; Dwi Ratnasari
; Puspita Putri Febriyani
; Dedi Muhammad Siddiq
; Hayundai Aulia
; Dwi Ratnasari
; Puspita Putri Febriyani
EBISNIS : JURNAL ILMIAH EKONOMI DAN BISNIS
Vol 18
, No 2
(2025)
Penelitian ini dimaksudkan untuk mengkaji pengaruh kompensasi finansial, kepuasan kerja, dan work-life balance terhadap loyalitas karyawan yang berasal dari Generasi Z. Latar belakang dari penelitian ini didasari oleh meningkatnya tingkat mobilitas kerja pada kelompok Generasi Z, yang menciptakan tatantangan sendiri bagi perusahaan dalam mempertahankan tenaga kerja muda yang memiliki potensi tinggi. Penelitian ini menerapkan pendekatan kuantitatif dengan menggunakan metode survei yang melibatkan...
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Education On Recycling Paper Waste Into Seed Paper As An Environmentally Friendly Product For Vocational School Students
Indonesian Journal of Empowerment and Community Service
Vol 6
, No 2
(2025)
Paper is a material with various daily applications, as a medium for writing, printing, drawing, wrapping, etc. Although in the digital era the role of paper is increasingly minimal, it cannot be denied that the use of paper continues. Besides being useful, paper also leaves a problematic side when it becomes waste. Paper waste that is tried to be eliminated by burning will cause air pollution in the form of disturbing and dangerous smelling smoke, especially in large and continuous volumes. Rec...
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