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Microwave-Pyrolysed Rice Husk-Derived Activated Carbon as a Sustainable Anode Material for Lithium-Ion Half-Cell Batteries
Surib , Nur Atiqah
; Mohd Abdah, Muhammad Amirul Aizat
; Farhana Syakirah Ismail
; Wong, Weng Pin
; Ab Latif, Farah Ezzah
; Mustafa, Muhammad Norhaffis
; Rashmi Walvekar
; Mohammad Khalid
Agricultural waste biomass is explored as a sustainable precursor for activated carbon. In this study, rice husk-derived activated carbon (RHAC) was synthesized via microwave-assisted pyrolysis and KOH activation at 600, 700, and 800 °C. The KOH activation enhanced the thermal stability of the samples, with RHAC_700 exhibiting a spongy, interconnected structure and a surface area of 390.33 m² g⁻¹. When evaluated as a half-cell anode materials for lithium-ion batteries, RHAC_700 delivered an init...
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Optimization of Mangrove Glucomannan Addition to Improve Physicochemical Properties of Kefir
Jeki Mediantari Wahyu Wibawanti
; Zulfanita
; Dita Yuzianah
; Harisun Binti Ya’acob
; Anang Mohamad Legowo
; Setya Budi Muhammad Abduh
; Sri Mulyani
Kefir is widely recognized as a functional fermented dairy product. However, its physicochemical stability, particularly pH, acidity, and syneresis, remains a challenge during processing and storage. The addition of functional polysaccharides, such as mangrove-derived glucomannan, has been proposed to improve kefir quality. This study aimed to investigate the effect of mangrove-derived glucomannan on the physicochemical properties of kefir. A Completely Randomized Design with different concentra...
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MORPHOLOGICAL CHARACTERIZATION OF BRAIN TUMOR TISSUE IN MRI IMAGES USING CNN AND TRANSFER LEARNING
Hilmi, Dafa Fadhilah
; Wibawa, Aji Prasetya
; Agustavada, Ardha Ardhana Putra
; Sholum, Abdullah
; Dwiyanto, Felix Andika
This study evaluates the role of computational pattern recognition as an observational method for analyzing morphological characteristics of brain tumor tissue in MRI data. A total of 6,056 labeled MRI images, including glioma, meningioma, and pituitary tumor cases, were examined. The images were standardized to maintain uniform structural representation and processed using three convolutional-based architectures: a baseline CNN, MobileNetV2, and EfficientNet-B0. Model performance was assessed u...
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Attention-Augmented GRU for Stock Forecasting: A Trade-Off Between Directional Accuracy and Price Prediction Error
R. Daniel Hartanto
; Guruh Fajar Shidik
; Farrikh Alzami
; Ahmad Zainul Fanani
; Aris Marjuni
; Abdul Syukur
Journal of Computing Theories and Applications
Vol 3
, No 4
(2026)
Attention mechanisms have been widely incorporated into recurrent neural network architectures for financial time series forecasting, with most prior work reporting improvements in price-level error metrics. This study revisits that claim through a controlled empirical comparison of four deep learning architectures on nearly two decades of Telkom Indonesia (TLKM) closing price data from the Indonesia Stock Exchange (IDX). The models evaluated are a three-layer Gated Recurrent Unit (GRU) baseline...
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Altitude-dependent Variation in Antibacterial Properties of Red Ginger (Zingiber officinale var. rubrum): Implications for Natural Anti-Salmonella Agents
Red ginger contains diverse bioactive compounds with strong antioxidant and antibacterial activities. This study investigated the influence of growth location on the anti-Salmonella activity of red ginger extracts from seven regions in Java, Indonesia. The fractions were analyzed for total phenolic and flavonoid contents, as well as antioxidant capacity using DPPH and FRAP assays. Antibacterial activity was assessed against Salmonella using the Kirby-Bauer disk diffusion method. Results showed t...
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Pharmacological prediction of Marchantia polymorpha: GC-MS and molecular docking approaches
Marchantia polymorpha is the liverworts that can be found abundantly in the Mount Pasang Jember area. The metabolite profiling of M. polymorpha has not yet been conducted. The method used in this study was untargeted metabolite profiling using GC-MS, and the results of the metabolite compound profiling were analyzed in silico using bioinformatics-based, namely PASS Online, SwisADME, and Molecular Docking using PyRx 8.0 with AutodockVina. The aims of docking with this protein was adjusted to th...
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Mangrove Biodiversity for Coastal Resilience and Sustainability: A Dynamic Case Study from Indonesia
Martuti, Nana Kariada Tri
; Jabbar, Abdul
; Irsadi, Andin
; Sidiq, Wahid Akhsin Budi Nur
; Melati, Inaya Sari
; Eldin Khair, Amar Sharaf
; Mutiatari, Dhita Pracisca
Mangrove degradation and socio-economic vulnerability in the Kendal coast require an integrated approach. The study used ecological surveys (mangrove vegetation analysis, avifauna) and socio-economic (n=186 households). Integrated Coastal Management (ICM) analysis and model were developed using a dynamic approach, encompassing problem identification, conceptual model formulation, and validation preparation. 14 mangrove species (H' index = 1.58–1.80) and 61 bird species (H' = 3.50) were found. Co...
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Manifestasi Kecemasan dan Depresi dalam Perilaku Digital: Analisis Psikologis terhadap Siklus Doomscrolling pada Mahasiswa : Analisis Psikologis Terhadap Siklus Doomscrolling pada mahasiswa
Jurnal Asosiatif
Vol 5
, No 1
(2026)
Integrasi media sosial dalam kehidupan mahasiswa membawa risiko psikologis baru berupa perilaku doomscrolling dan social media fatigue yang mengancam kesejahteraan mental. Penelitian ini bertujuan untuk memahami dinamika psikologis di balik perilaku doomscrolling serta mengurai keterkaitannya dengan simptom depresi dan kecemasan pada mahasiswa. Metode yang digunakan adalah studi kepustakaan (library research) dengan pendekatan deskriptif-analitis terhadap literatur ilmiah yang dipublikasikan ant...
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Peningkatan Keterampilan Perawatan Peralatan Medis Bagi Pengasuh Bayi dan Anak di Rumah Anak Surga Melalui Sosialisasi dan Edukasi
Jurnal Suara Pengabdian 45
Vol 5
, No 1
(2026)
Pengunaan peralatan elektromedik merupakan faktor krusial dalam pemantauan kesehatan bayi dan anak terutama pada akurasi hasil yang di peroleh. Sesuai dari data yang didapat bahwa mitra telah memiliki sarana medis dasar yang memadai, namun diperlukan standarisasi manajemen pemeliharaan untuk menjaga fungsionalitas alat dalam jangka panjang. Kegiatan pengabdian masyarakat ini bertujuan untuk memperkuat kapasitas teknis para pengasuh dalam pengoperasian dan perawatan peralatan medis secara mandiri...
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Enhancing Speaking Skills through Digital Storytelling: A case study
ETERNAL: English Teaching Journal
Vol 17
, No 1
(2026)
This research assessed how digital storytelling (DST) could enhance the junior high school students' oral proficiency skills in speaking the English language in the context of Islamic schooling in Indonesia. The research deployed a quasi – experimental design within the context of an Islamic school setting. The sample consisted of 64 students. 31 students comprised the experimental class who received instruction through the use of DST while 33 students made the control class who were taught usin...
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