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Banana Peel-Derived Activated Carbon/MnO₂ Composites for Supercapacitor Electrode Applications
Herwanti, Katarina
; Saptono Nugrohadi
; Muhammad Taufiq Anwar
; Stanislaus Christo Petra Nugraha
; Dail Umamil Asri
; Noening Andrijati
Banana peel waste is an abundant agricultural by-product with high carbon content but remains largely underutilized. This study presents a preliminary investigation into the conversion of banana peel waste into activated carbon and its integration with manganese dioxide (MnO₂) to produce biomass-derived composite electrodes for supercapacitor applications. Activated carbon was prepared by carbonization followed by chemical activation using 30 wt% H₃PO₄, while MnO₂–carbon composites were synthesi...
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Data-Driven Machine Learning Models for Steam Turbine Efficiency Prediction
Increased electricity consumption in Indonesia requires coal-fired power plants to operate at high efficiency. This study proposes a data-driven approach to predict the efficiency of coal-fired steam turbines by utilizing 844 historical operational data points from the XYZ coal-fired power plant. Input variables include main steam pressure and temperature, main steam flow, final feedwater temperature, and condenser vacuum pressure. Four machine learning algorithms, namely Random Forest, Extra Tr...
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Prototype and Validation of an IoT-Based Voltage and Temperature Monitoring System for Remote ISP Point-of-Presence (POP) Infrastructure
Monitoring electricity and temperature is crucial for maintaining PoP server performance. This research developed an Internet of Things (IoT)-based tool using a NodeMCU ESP32 to directly monitor these two factors. The ZMPT101B sensor measures electrical voltage, while the DHT22 sensor monitors the temperature of the room and server rack. Information obtained from the sensor is sent in real time via a Telegram Bot to the administrator. This tool is particularly useful for PoP located remotely, as...
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Sustainable Cement Paste Incorporating Andesite Waste Powder: Mechanical Performance and Feasibility for Ornamental Elements
Utilising industrial waste as a partial solution for Portland cement has become more common as the need for environmentally friendly building materials grows. The potential of using andesite waste powder (AWP), a byproduct of the stone-processing industry, as a cementitious material for ornamental cement-based products is examined in this study. The flowability, dry unit weight, and compression strength tests were done on cement paste samples with 0%, 50%, and 75% AWP replacement levels at water...
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Dynamic Chaotic–Adversarial Framework for High-Capacity and Imperceptible Image Steganography
Sari, Wellia Shinta
; Sari, Christy Atika
; Setiyani, Safira Hasna
; Triyono, Agus
; Ali, Rabei Raad
The rapid growth of digital communication has intensified concerns regarding data confidentiality as sensitive information transmitted through multimedia images is increasingly vulnerable to interception and unauthorized analysis. Conventional image steganography methods often struggle to simultaneously achieve high embedding capacity, strong imperceptibility, and resistance to modern steganalysis. To address this challenge, this study proposes a steganographic framework that integrates dynamic...
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LDWFOX Optimization for Hyperparameter Tuning of Inception CNN in UAV-Based Vegetation Density Mapping
Pramunendar, Ricardus Anggi
; Alomoush, Ashraf
; Prabowo, Dwi Puji
; Megantara, Rama Aria
; Alzami, Farrikh
; Winarsih, Nurul Anisa Sri
; Pergiwati, Dewi
; Shidik, Guruh Fajar
Vegetation density classification from UAV imagery is a practical necessity in fire-prone landscapes, since fuel load on the ground directly informs risk management decisions. Convolutional neural networks handle this classification reasonably well, but good performance requires careful hyperparameter tuning, and manual trial and error produces results that are unstable and hard to reproduce. This study proposes LDW-FOX, a modified FOX metaheuristic using a Linearly Decreasing Weight mechanism t...
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Two Regimes of Valuation: Commercial Extraction and Administrative Devaluation in the Political Economy of Communication
Jurnal Audience: Jurnal Ilmu Komunikasi
Vol 9
, No 2
(2026)
This article develops a critical political-economy analysis of how communicative work becomes economically and legally intelligible. It examines two empirical sites, a) the commercial political commentary of the American podcast Pod Save America (PSA) on Donald Trump's reciprocal tariff policy, and the prosecution of Indonesian videographer Amsal Christy Sitepu over village profile videos produced under a digital-village program. Drawing on Vincent Mosco's political economy of communication, the...
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Festival Serabi Likuran Sebagai Model Komunikasi Budaya Pembentuk Place Branding Desa Wisata Penggarit
Jurnal Audience: Jurnal Ilmu Komunikasi
Vol 9
, No 2
(2026)
Tradisi Serabi Likuran merupakan praktik budaya berbasis kuliner yang berkembang di masyarakat Desa Wisata Penggarit. Tradisi ini mulanya sebagai bentuk silaturahmi dan komunikasi sosial pada malam-malam akhir Ramadhan, yang kemudian dikembangkan menjadi festival budaya. Penelitian ini bertujuan untuk menganalisis model komunikasi budaya dalam tradisi tersebut serta mengkaji transformasinya menjadi festival budaya dan instrumen place branding desa wisata Penggarit. Metode penelitian menggunakan...
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Sosialisasi Scratch Sebagai Media Plugged Coding Untuk Penguatan Numerasi Sekolah Dasar
Journal of Informatics Education
Vol 9
, No 1
(2026)
Transformasi pembelajaran digital di sekolah dasar memerlukan media yang tidak hanya menarik, tetapi juga mendukung kemampuan numerasi dan keterampilan berpikir siswa. Kegiatan pengabdian ini bertujuan meningkatkan kompetensi guru dalam memanfaatkan Scratch sebagai media ajar plugged coding serta memberikan pengalaman pembelajaran numerasi yang lebih interaktif kepada siswa. Kegiatan dilaksanakan di SDN 2 Tegowanu Wetan menggunakan pendekatan partisipatif melalui empat tahap, yaitu persiapan, so...
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Stereotip Penyandang Disabilitas Dalam Pemberitaan Media Online Suaramerdeka.Com
Jurnal Audience: Jurnal Ilmu Komunikasi
Vol 9
, No 2
(2026)
Penelitian ini mengkaji stereotip penyandang disabilitas dalam pemberitaan media online lokal melalui studi pada Suaramerdeka.com. Permasalahan utama penelitian ini adalah bagaimana stereotip terhadap penyandang disabilitas diproduksi dan direproduksi dalam pemberitaan media online. Penelitian menggunakan paradigma kritis dengan metode Analisis Wacana Kritis Norman Fairclough yang mencakup tiga dimensi analisis, yaitu teks, praktik wacana, dan praktik sosiokultural. Corpus penelitian terdiri ata...
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