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Menampilkan 1–10 dari 309 artikel
Effect of Printing Speed on the Properties of 3D Printed Products Using Recycled PET Filament
Fitriyana, Deni Fajar
; Agung Efriyo Hadi
; Nugroho Suhodo
; Aldias Bahatmaka
; Januar Parlaungan Siregar
; Tezara Cionita
; Zuhriyan Ash Shiddieqy Bahlawan
; Achmad Yanuar Maulana
Recycled PET has been widely studied for its potential use in 3D printing applications. However, few research has examined how printing speed affects recycled PET filament products' mechanical and physical qualities. This research examines how printing speed influences the physical and mechanical qualities of 3D-printed PET filament goods created from mineral water bottle trash. In this study, filament fabrication is carried out using the homemade pultrusion machine, then the filament is used fo...
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Pendampingan Aktivitas Fisik bagi Anak Usia Dini untuk Mencegah Sedenteri
Dhuha, Ahad Agafian
; Yogaswara, Andre
; Muhibbi, Muhammad
; Widodo, Agung
; Abubakar, Sayid Fariz Bin Seh
; Firdaus, Mohammad Fajar
Jurnal Inovasi dan Pengabdian Masyarakat Indonesia
Vol 5
, No 2
(2026)
Latar belakang: Tingginya durasi screen time dan rendahnya aktivitas fisik anak usia dini mengakibatkan berbagai penyakit dan gangguan perkembangan motorik pada anak. Kurangnya aktivitas fisik berpengaruh terhadap keterlambatan gerak seperti berjalan dan keterlambatan bicara. Pemberian handphone dalam jangka waktu lama dan kurangnya stimulus oleh keluarga merupakan salah satu penyebab utama terjadinya berbagai gangguan kesehatan dan perkembangan pada anak. Kurangnya aktivitas fisik, tingginya a...
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Fractional Corner Charges in Ionic Crystals: A Case Study of Sodium Chloride Using the DV-Xα Molecular Orbital Method
Recent theoretical predictions have revealed that even simple ionic crystals such as sodium chloride (NaCl) can exhibit fractional corner charges due to their topological characteristics. In this study, we employ the DV-Xα molecular orbital method to analyze the electronic structure of NaCl clusters in 1D, 2D, and 3D configurations. Cluster models were constructed with varying atomic numbers, and their highest occupied molecular orbitals (HOMOs), net atomic charges, and electrostatic potential m...
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Microencapsulation of Phycocyanin from Spirulina platensis by Freeze-Drying: Optimization of Maltodextrin–Soy Protein Matrices for Enhanced Stability and Antioxidant Functionality
Marlina, Dian
; Saputra, Ryan Werytama
; Aji Prasetyo, Takad Bagas
; Muhamad Ansory, Hery
; Aisiyah, Siti
; Purwaningsih, Desi
Phycocyanin, a natural blue pigment from Spirulina platensis, exhibits strong antioxidant activity but is highly unstable under light, heat, and pH variations, limiting its practical applications. This experimental study addresses the lack of systematic optimization data on maltodextrin–soy protein isolate (SPI) wall matrices for phycocyanin microencapsulation via freeze-drying. Phycocyanin was extracted using phosphate buffer and encapsulated at different maltodextrin:SPI ratios (9:1, 8:2, and...
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Evaluating Civil Servant Selection through Machine Learning Analysis of National Insight, General Intelligence, and Personal Characteristics Test Scores
This study analyzes the score distribution of 2,490 candidates in the 2024 Ministry of Finance Public sector recruitment, focusing on the CNI, GIT, and PCT sections using machine learning classification. Models used include Logistic Regression (accuracy 0.7897), Random Forest (0.9779), and XGBoost (0.9809), all trained with default parameters (n_estimators=100, max_depth=None) and evaluated using accuracy, precision, recall, and F1-score. While ensemble models outperformed Logistic Regression, t...
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Oligonuclear Cobalt Assembly with Schiff-base Ligands
In order to develop molecular magnetic compounds, oligonuclear cobalt complexes with Schiff-base ligands, 1,3-bis(salicylideneamino)-2-propanol (H3salpr), 1,3-bis(5-chlorosalicylideneamino)-2-propanol (H3clsalpr), 1,3-bis(5-bromosalicylideneamino)-2-propanol (H3brsalpr), and 1,3-bis(5-nitrosalicylideneamino)-2-propanol (H3pnsalpr), were synthesized by reaction of cobalt(II) acetate and Schiff-base ligand in organic solvent. The molecular structures of [CoII{CoIII(µ-HL)(µ-CH3COO)(CH3COO)}2] (HL =...
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Portfolio Risk Assessment Using VaR and CVaR: A Comparative Study of Variance–Covariance Method and Monte Carlo Simulation
Telematika
Vol 19
, No 1
(2026)
This study examines portfolio risk in Indonesia’s energy sector by applying Value at Risk (VaR) and Conditional Value at Risk (CVaR) under the Variance–Covariance and Monte Carlo Simulation approaches. The analysis focuses on ten stocks from the oil and gas as well as coal subsectors listed on the Indonesia Stock Exchange (IDX), using monthly closing price data from January 2020 to December 2024. A Weighted Scoring Method (WSM) is first employed to select stocks with superior fundamentals and li...
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Implementasi Kepemimpinan Integratif Berbasis Nilai Profetik: Studi Analitis Gaya Transformasional, Instruksional, dan Servant di SMA Muhammadiyah PK Kottabarat Surakarta
Jurnal Riset sosial humaniora, dan Pendidikan (Soshumdik)
Vol 5
, No 1
(2026)
The principal’s leadership plays a strategic role in determining the direction and quality of educational implementation in schools. This study aims to analyze the implementation of integrative leadership based on prophetic values through the application of transformational, instructional, and servant leadership styles at SMA Muhammadiyah PK Kottabarat Surakarta. Islamic-based schools face challenges in integrating academic excellence with the development of religious character; therefore, a lea...
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Immersive Interventions for Dementia: A Narrative Review of Virtual Reality's Role in Therapy, Well-Being, and Future Care Models
Journal of Computing Theories and Applications
Vol 3
, No 3
(2026)
Dementia is a progressive neurocognitive disorder often accompanied by behavioral and psychological symptoms such as agitation, anxiety, and depression. Pharmacological treatments provide only modest benefits while introducing significant risks, which highlights the need for safer, non-pharmacological alternatives. This literature review examines the role of virtual reality in dementia care, with a focus on its integration with therapies such as music, reminiscence, sensory stimulation, and cogn...
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Development of an Early Childhood Education Curriculum Model to Build Traffic Discipline Awareness Through a Musical Arts Approach
Paudia
Vol 15
, No 1
(2026)
Character education should teach kids about traffic discipline from a young age to lower the chance of accidents and help them become more socially responsible. This study seeks to build a cohesive curriculum model for early childhood education centred on character development through music education to promote traffic discipline. The research employed a systematic literature review in accordance with the PRISMA procedure, encompassing the stages of identification, screening, eligibility evaluat...
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