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All Journal Infotekmesin Journal of Moeslim Research Technik
Titiek Deasy Saptaryani
Universitas Bima Sakapenta
Aerospace Engineering Automotive Engineering Computer Science & IT Control & Systems Engineering Electrical & Electronics Engineering Engineering Mechanical Engineering

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SMART MOSQUE: AN IOT-BASED CONTROL SYSTEM FOR MANAGING ENERGY CONSUMPTION AND FACILITY OPERATIONS Titiek Deasy Saptaryani; Syafiq Amir; Liam Wilson
Journal of Moeslim Research Technik Vol. 2 No. 6 (2025)
Publisher : Yayasan Adra Karima Hubbi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.70177/technik.v2i6.2716

Abstract

Public and religious facilities, like mosques, often suffer from substantial energy waste due to large physical footprints, manual control, and highly intermittent, non-linear occupancy patterns. This chronic inefficiency results in high utility bills, diverting scarce community funds away from core charitable and social welfare missions, underscoring the necessity for advanced, cost-effective automation. This study aims to design and empirically validate the “Smart Mosque Architecture,” an integrated Internet of Things (IoT) system utilizing a novel Dynamic Prayer Time-Based Control Algorithm (DPT-BCA) to proactively optimize energy consumption across lighting and HVAC systems. A quantitative, quasi-experimental time-series analysis was conducted over a six-month experimental period, comparing the system’s performance against a four-month manual control baseline. The custom low-cost system achieved a statistically significant average monthly energy reduction of 30.0% (p < 0.001), driven primarily by a 47.4% reduction in HVAC runtime. Financial analysis confirmed the system’s economic viability, yielding a simple Return on Investment (ROI) in just eighteen months. The Smart Mosque Architecture is a robust and superior predictive control solution for religious facilities. The DPT-BCA successfully maximizes energy efficiency and service quality, establishing a scalable, ethical blueprint for sustainable institutional facility management worldwide.
Pengaruh Variasi Media Quenching pada Solution Treatment Paduan Al–Si Hasil Remelting piston terhadap Kekerasan dan Struktur Mikro Titiek Deasy Saptaryani; Muhammad Munawir Lasiyono
Infotekmesin Vol 17 No 2 (2026): Infotekmesin: Juli 2026
Publisher : P3M Politeknik Negeri Cilacap

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35970/

Abstract

Recycled aluminum–silicon (Al–Si) alloys produced from remelted automotive pistons are increasingly utilized in the casting industry because of their cost-effectiveness, recyclability, and environmental benefits. However, the remelting process may degrade material quality through microstructural changes, porosity formation, and deterioration of mechanical properties. Studies investigating the influence of different quenching media on remelted Al–Si piston alloys remain limited. The novelty of this study lies in evaluating the relationship between quenching media, microstructural evolution, and hardness characteristics of remelted Al–Si piston alloys. This study aimed to investigate the effect of different quenching media after solution treatment on the hardness and microstructure of remelted Al–Si alloys. Used automotive pistons were remelted, cast into metal molds, and machined into standard test specimens. The specimens were heated from room temperature to 550 °C in approximately 30 min, held at 550 °C for 90 min, and quenched in water, oil, or air. Hardness was evaluated using the Brinell hardness test, while the microstructure was examined by optical microscopy. The highest hardness was obtained in the specimen without quenching (63.3 HB), followed by water quenching (62.6 HB), oil quenching (59.6 HB), and air cooling (51.6 HB). Water quenching produced a finer and more homogeneous distribution of silicon particles than oil and air cooling. These findings provide a scientific basis for selecting an appropriate quenching medium to optimize the heat treatment of recycled Al–Si alloys for sustainable casting applications.
Co-Authors Liam Wilson Muhammad Munawir Lasiyono Syafiq Amir