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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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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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Project-Based Learning Effect on Improving Students’ Creative Thinking in Static Fluid Learning
Jurnal Penelitian Pembelajaran Fisika
Vol 16
, No 4
(2025)
The low creative thinking ability of students in understanding physics concepts, especially in static fluid material, is one of the problems that needs attention in the learning process. Therefore, this study aims to determine how the Project Based Learning (PjBL) learning model that uses a scientific approach affects students' ability to think creatively about static fluid material. The research method used is a quasi-experimental design with a Nonequivalent Control Group Design. The research s...
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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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Hybrid Deep and Machine Learning Framework for Cloud and Shadow Segmentation in Landsat-8 Imagery
Advance Sustainable Science, Engineering and Technology (ASSET)
Vol 7
, No 4
(2025)
Cloud and shadow interference in satellite imagery reduces the quality and reliability of remote sensing data. The traditional method would face issue to predict data near the shadow and cloud. To address this challenge, this study is focus improve the accuracy the area near shadow and cloud detection in Landsat-8 imagery. The implementation of hybrid module using standard CNN and U-Net CNN and a machine learning model using K-Nearest Neighbors (KNN) on SPARCS and CCA18 Landsat 8 dataset. A hybr...
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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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Analisis Strategi Promosi Penjualan pada Marketplace Shopee BMA Baju Murah Anak
EBISNIS : JURNAL ILMIAH EKONOMI DAN BISNIS
Vol 18
, No 2
(2025)
Penelitian ini bertujuan untuk menganalisis strategi promosi penjualan yang diterapkan oleh BMA (Baju Murah Anak) pada marketplace Shopee. Meskipun telah melakukan berbagai upaya promosi, penjualan BMA cenderung fluktuatif dan belum mencapai target yang diharapkan. Penelitian ini menggunakan pendekatan kualitatif deskriptif dengan teknik pengumpulan data melalui observasi, wawancara, dan dokumentasi. Penelitian terfokus pada empat strategi promosi utama yaitu pemberian, paket harga, pengembalian...
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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 Budaya Organisasi, Kepuasan Kerja, dan Kompensasi Finansial Terhadap Kinerja Karyawan PT. Kereta Api Indonesia
EBISNIS : JURNAL ILMIAH EKONOMI DAN BISNIS
Vol 18
, No 2
(2025)
Hubungan antara budaya organisasi, kepuasan kerja dan kompensasi finansial terhadap kinerja karyawan PT Kereta Api Indonesia (Persero) Daop 3 Cirebon adalah subjek penelitian ini. Pendekatan kuantitatif diterapkan dalam penelitian ini, dengan menggunakan analisis regresi berganda yang diolah melalui perangkat lunak SPSS versi 26. Penelitian ini melibatkan sampel sebanyak 111 orang yang terpilih secara acak dari 153 orang populasi dalam penelitian. Budaya organisasi dan kepuasan kerja memberikan...
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