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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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Bottleneck Analysis and Improvement in Apparel Manufacturing Production Processes Using Integration Design of Experiments and Discrete Event Simulation
Bottlenecks in apparel manufacturing often cause unbalanced production flows, increased waiting times, and reduced system performance. This study aims to analyze and eliminate bottlenecks by integrating Design of Experiments (DOE) and Discrete Event Simulation (DES). Four workstations (X1–X4) were selected as experimental factors, while system performance was evaluated using bottleneck indicators across six production stages (Y1–Y6). DOE was used to design capacity scenarios, and DES assessed sy...
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Design of a Web-Based CRM Information System for Customer Management and Transaction History at Sumber Rejeki Store, Gubug District, Grobogan Regency
JUISI : Jurnal Ilmiah Sistem Informasi
Vol 17
, No 1
(2026)
The development of information and communication technology encourages Micro, Small, and Medium Enterprises (MSMEs) to manage data more effectively, efficiently, and integratively to create consumer loyalty. Efforts can be made using a web-based Customer Relationship Management (CRM) Information system to manage customer data and transaction history in an integrated, effective, and efficient manner. The many complaints from several stores in Grobogan Regency, especially Toko Sumber Rezeki, regar...
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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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Effect of Different Layers on the Performance of Laminate Epoxy Composite Reinforced with Textile Waste
Thomas Junaedi
; Siregar, Januar Parlaungan
; Zalani, Mohamed Reza
; Imran, Al Ichlas
; Tezara Cionita
; Endah Murtiana Sari
; Deni Fajar Fitriyana
; Etanto Heiliano Wijayanto
Post-consumer textile waste poses significant environmental problems, but its potential for commercial recycling remains under-researched. Therefore, this study utilizes calico textile (CT) waste as reinforcement in polymer composites. The effect of layering number of CT in epoxy composite will be investigated. CT was varied with three layers, namely 1, 3, and 5 embedded in epoxy resin with the hand lay-up method in open molding. The mechanical testing of pure epoxy as a control point for tensil...
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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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Implementation of the Waterfall for Web-Based Integrated Network Service Management System: WiFi, CCTV, Cable TV
JUISI : Jurnal Ilmiah Sistem Informasi
Vol 16
, No 2
(2026)
The management of integrated network services, including WiFi, CCTV, and Cable TV, requires high data accuracy to ensure customer satisfaction and revenue stability. PT. Sumber Aiti faced operational challenges due to manual administrative systems, causing data redundancy, delays in handling service disruptions, and financial discrepancies in the billing cycle. This study aims to design and develop a Web-Based Integrated Network Service Management Information System using the Waterfall developme...
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Android-Based Tourism Geographic Information System For Blitar Raya Utilizing Google Maps API and Kotlin
Pratama, Dimas Adi
; Santi, Indyah Hartami
; Febrinita, Filda
; Pratama, Dimas Adi
; Santi, Indyah Hartami
; Febrinita, Filda
JUISI : Jurnal Ilmiah Sistem Informasi
Vol 4
, No 1
(2026)
The limited availability of integrated digital tourism information in Blitar Raya has made it challenging for visitors to plan their travel routes efficiently. This research aims to develop an Android-based Geographic Information System (GIS) that integrates the Google Maps API with the Bellman-Ford algorithm to optimize the shortest travel routes among tourism destinations. The system was developed using the Rapid Application Development (RAD) methodology, emphasizing user involvement through i...
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Peran Mediasi Penerapan Sistem E-Filing terhadap Keterkaitan Sikap terhadap E-Filing dan Kepatuhan Wajib Pajak
KOMPAK : Jurnal Ilmiah Komputerisasi Akuntansi
Vol 32
, No 1
(2026)
This study aims to examine the extent to which taxpayers’ attitudes toward e-filing influence tax compliance, with the implementation of e-filing positioned as a mediating variable among employees of PT Selalu Cinta Indonesia (SCI) registered at the Primary Tax Office (KPP Pratama) of Salatiga City. The population comprised 18,244 employees, from which a sample of 100 respondents was selected using purposive sampling. Data were processed and analyzed using simple linear regression and path analy...
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