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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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Development of E-Worksheets Discovery Learning Model Assisted by Augmented Reality for Renewable Energy Topic
Jurnal Penelitian Pembelajaran Fisika
Vol 16
, No 4
(2025)
The poor motivation and interest of students in learning physics which is frequently viewed as challenging and less interesting led to the conduct of this study. As a result, creating cutting-edge educational materials that may facilitate interactive learning and foster a deeper conceptual grasp is essential. Building an Electronic Student Worksheet on the subject of renewable energy using the Discovery Learning methodology enhanced by Augmented Reality is the aim of this study. The research and...
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Problem Based Learning Effect Using the TaRL Approach on Problem-Solving Skills in Global Warming Topic
Jurnal Penelitian Pembelajaran Fisika
Vol 16
, No 4
(2025)
Physics learning is often considered difficult because students are unable to relate concepts to real-world problems they encounter. This condition results in low problem-solving skills among students, especially on contextual topics such as global warming. This study aims to determine the effect of the Problem Based Learning (PBL) model with the Teaching at the Right Level (TaRL) approach on students' problem-solving skills in global warming material. The research method used was quantitative w...
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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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Development of A Multidimensional Assessment Instrument on the Topic of Torque
Jurnal Penelitian Pembelajaran Fisika
Vol 16
, No 4
(2025)
This research focuses on the development of a multidimensional assessment instrument aimed at evaluating high school students’ learning outcomes in the topic of torque within physics education. The instrument integrates cognitive, affective, and psychomotor domains through a combination of multiple-choice questions for conceptual understanding and Likert-scale questionnaires for assessing students’ interest and communication skills. The development process followed a systematic model consisting...
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Development of Interactive Learning Media Based on Digital Platforms to Improve Critical Thinking Skills in Primary School Science Education
Jurnal Penelitian Pembelajaran Fisika
Vol 16
, No 4
(2025)
The study aims to analyze how the use of interactive learning media based on digital platforms impacts students' critical thinking skills. By collecting quantitative and qualitative data, it is hoped that comprehensive information can be obtained regarding the extent to which interactive learning media influences the development of students' critical thinking skills. The methods used are qualitative analysis: Using ADDIE analysis to identify themes and patterns that emerge from interviews and ob...
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Design of Wideband SPDT RF Switch Using Switchable DGS for Sustainable Wireless Systems
Othman, Adib
; Shairi, Noor Azwan
; A Majid, Huda
; Saparudin, Faiz Asraf
; Zakaria, Zahriladha
; Najib Al-Fadhali
Advance Sustainable Science, Engineering and Technology (ASSET)
Vol 7
, No 4
(2025)
This paper presents a single-pole double-throw (SPDT) switch that is integrated with a thin rectangular patch switchable defected ground structure (DGS). It is a novel technology for obtaining wideband and high isolation for the SPDT switch in millimeter-wave (mm-wave) telecommunications due to the usage of switchable DGS with bandstop and bandwidth enhancement capabilities. A wideband and high isolation are required for the switchable DGS SPDT switch to operate optimally in mm-wave frequency ra...
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ANALISIS YURIDIS PERJANJIAN JUAL BELI PERUMAHAN DENGAN METODE DOWN PAYMENT
DINAMIKA HUKUM
Vol 26
, No 2
(2025)
Cases of non-performance of contract. on the part of the aggrieved party bring the case to the criminal realm. The charge reported is the fraud article, even though the criminal offense has not been fulfilled. So that it has the potential to cause wrong criminalization, the main problem is the inaccurate use of the fraud article against defaults which are basically civil. The research method uses normative juridical with decision analysis and criminal and civil law studies related to non-perform...
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Pengaruh Etos Kerja, Motivasi Intrinsik, Dan Kepuasan Kerja Terhadap Kinerja Karyawan
EBISNIS : JURNAL ILMIAH EKONOMI DAN BISNIS
Vol 18
, No 2
(2025)
Penelitian ini bertujuan untuk menganalisis pengaruh etos kerja, motivasi intrinsik, dan kepuasan kerja terhadap kinerja karyawan di perusahaan-perusahaan yang beroperasi di Kota Cirebon. Kinerja karyawan menjadi salah satu indikator penting dalam menjamin keberlangsungan dan daya saing perusahaan. Namun, ketidaksesuaian antara potensi sumber daya manusia dan hasil aktual di lapangan masih sering terjadi, ditandai dengan rendahnya produktivitas, tingginya turnover, serta loyalitas karyawan yang...
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