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All Journal JET (Journal of Electrical Technology) JURTEKSI Jurdimas (Jurnal Pengabdian Kepada Masyarakat) Royal Jurnal Penelitian Jurnal Review Pendidikan dan Pengajaran (JRPP) REMIK : Riset dan E-Jurnal Manajemen Informatika Komputer Journal of Computer Science, Information Technology and Telecommunication Engineering (JCoSITTE) Information System Journal (INFOS) Jurnal Pengabdian Kepada Masyarakat (JPKM) Langit Biru International Journal of Science and Environment Kapuas Jurnal Pengabdian Masyarakat JURNAL PERSEGI BULAT
Harahap, Nurmahendra
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Parameter Optimization of CLAHE Method and Unsharp Mask Filter for Historic Image Quality Improvement Hidayat, Jhoni; Harahap, Nurmahendra; Fitriani, Ayu; Syafriwel, Syafriwel; Faisal, Ahmad; Rizki, Mhd Fahmi Syawali
Journal of Computer Science, Information Technology and Telecommunication Engineering Vol 6, No 2 (2025)
Publisher : Universitas Muhammadiyah Sumatera Utara, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30596/jcositte.v6i2.26319

Abstract

Historical images, such as old documentary photographs, ancient maps, manuscripts, or printed archives, are an important part of cultural and scientific heritage that provide a visual record of the past. Many available historical images have poor image quality because camera technology at that time was still in its infancy. This study examines the optimization of the combination of CLAHE (Contrast Limited Adaptive Histogram Equalization) and Unsharp Masking to improve the quality of historical images that have poor contrast, noise, and faded details. The approach includes preprocessing (greyscale image), CLAHE parameter optimization (clip limit) with a range of 0.01, 0.02, 0.03, 0.04, 0.05, and the Unsharp Mask method with a radius parameter of 1 and an amount parameter of 0.8. The clip limit parameter will be found that has better performance. To evaluate performance, the objective metrics Mean Squared Error (MSE) and Peak Signal-to-Noise Ratio (PSNR) are used. Based on the criteria of the smallest MSE and the highest PSNR, the results showed that a clip limit of 0.01 was the most optimal parameter. This configuration proved effective in increasing contrast, sharpening detail, and minimizing noise, thus improving the quality of historical image restoration.
Rancang Bangun Miniatur Sistem Distribusi Pada Sistem Tenaga Listrik Gulo, Elpisman; Syafriwel, Syafriwel; Hidayat, Jhoni; Fitriani, Ayu; Harahap, Nurmahendra
Fakultas Teknik dan Ilmu Komputer Vol 4 No 1 (2025): JURNAL PERSEGI BULAT
Publisher : FAKULTAS SAINS DAN TEKNOLOGI - UTND

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36490/jurnalpersegibulat.v4i1.2194

Abstract

Sistem distribusi tenaga listrik merupakan bagian akhir dari sistem tenaga listrik yang berperan penting dalam mengalirkan energi listrik dari pembangkit ke konsumen. Komponen utama dalam sistem distribusi tenaga listrik mencakup transformator distribusi, saluran distribusi, dan perangkat perlindungan. Proses perancangan ini dirancang menggunakan sumber AC (Alternating Current) 220V yang dilindungi MCB (Miniatur Circuit Breaker) 6A, diturunkan melalui trafo menjadi 9V AC (Alternating Current), lalu disearahkan dan distabilkan menjadi DC (Direct Current) untuk menyalakan rangkaian LED (Light-Emitting diode) dengan resistor dan saklar, membentuk sistem distribusi listrik miniatur yang aman dan terkontrol. Hasil pengujian menunjukkan bahwa rancang bangun laboratorium sistem distribusi pada sistem tenaga listrik berhasil berfungsi sesuai dengan perancangan. Sistem ini mampu mendistribusikan energi secara aman dan stabil, serta memberikan perlindungan dan efisiensi tegangan yang baik. Dengan performa yang konsisten, alat ini diharapkan dapat menjadi media praktikum yang efektif dalam mendukung proses pembelajaran di Laboratorium Teknik Elektro, khususnya dalam memahami prinsip distribusi tenaga listrik berbasis DC (Direct Current).
Reduction Of Air Conditioner Energy Consumption Through The Implementation Of A Non-Invasive Sensor Based Automatic Control System Harahap, Nurmahendra; Indra Cahyadi, Catra; Syafriwel, Syafriwel; legito, legito; Hidayat, Jhoni
International Journal of Science and Environment (IJSE) Vol. 5 No. 3 (2025): August 2025
Publisher : CV. Inara

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.51601/ijse.v5i3.171

Abstract

High energy consumption from air conditioning (AC) systems is a significant challenge to building energy efficiency, particularly in Indonesia's building sector where AC units can account for up to 70% of the total electrical load. This problem is often exacerbated by user negligence, such as leaving units on in unoccupied rooms. This research aims to design, build, and test a universal, non-invasive automatic control device to reduce such energy waste by automating its operation based on occupancy and temperature. The system integrates a Passive Infrared (PIR) sensor for occupancy detection and a DHT22 sensor for temperature monitoring, controlled by an Arduino Nano. Its primary innovation is a servo motor that mechanically presses the AC remote's button, ensuring universal compatibility. The control logic activates the AC only when presence is detected and the temperature exceeds 25°C, and deactivates it after a period of vacancy. The device's effectiveness was evaluated through comparative 8-hour tests on two different AC units. The results demonstrated highly significant energy savings. The use of the device reduced energy consumption by 2.716 kWh (44.85%) for AC 1 and 3.280 kWh (41.80%) for AC 2. With an average energy efficiency improvement exceeding 43%, the non-invasive automatic control device is proven to be a highly effective solution. Its universal, non-invasive design makes it a practical and widely applicable tool for energy conservation in various environments.
ANALISA PERBAIKAN PADA GROUND STATION (GS) RECEIVER AUTOMATIC DEPENDENT SURVEILLANCE BROADCAST (ADS-B) MATAK DI JAKARTA AIR TRAFFIC SERVICE CENTER (JATSC) Anwar, Syairi; Usman, Usman; Hasibuan , Eriansyah Saputra; Harahap, Nurmahendra; Mattew, Jason Juan
Jurnal Review Pendidikan dan Pengajaran Vol. 7 No. 3 (2024): Volume 7 No 3 Tahun 2024
Publisher : LPPM Universitas Pahlawan Tuanku Tambusai

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31004/jrpp.v7i3.29944

Abstract

Ground Station (GS) Receiver Automatic Dependent Surveillance Broadcast (ADS-B) merupakan elemen kunci dalam sistem pemantauan lalu lintas udara modern. Penelitian ini bertujuan untuk mengatasi gangguan operasional pada peralatan GS Receiver ADS-B di MATAK, yang mengalami kesulitan dalam mendeteksi sejumlah target. Metode penelitian mencakup analisis terhadap komponen peralatan, penggantian modul yang rusak, serta uji coba untuk memastikan peralatan berfungsi normal kembali. Hasil analisis mengindikasikan bahwa gangguan terjadi pada proses amplifikasi sinyal di bagian Airborne Acquisition Unit (AAU), khususnya pada modul Low Noise Amplifier (LNA). Dengan mengganti modul LNA dan melakukan penyesuaian komponen, uji coba menunjukkan bahwa peralatan GS Receiver ADS-B di MATAK kembali berfungsi optimal dan mampu mendeteksi target dengan jarak yang memadai. Temuan ini menekankan pentingnya respons cepat dalam menangani gangguan operasional pada fasilitas penerbangan guna menjaga keselamatan penerbangan.
Co-Authors Afandi Syahputra Ahmad Faisal Amril, Muhammad Ayu Fitriani Ayub Wimatra Catra Indra Cahyadi Dean Timothy Raja Gulo, Elpisman Habib Muharry Indra Cahyadi, Catra Iswandi Idris Jhoni Hidayat legito, Legito Leman, Dedi Mattew, Jason Juan Maulia Rahman Muchlishiin, Moh Muhammad Amril Mutiara Widasari Sitopu Putra, Rizky Aulia Raja, Dean Timothy Rizaldy Khair Rizki, Mhd Fahmi Syawali Rizky Aulia Putra Santosa, Asri Sari, Indah Vusvita Sirait, Donna Nurhaida Masdiana sunardi sunardi Sunardi Sunardi Syafriwel, Syafriwel Syahputra, Afandi Syairi Anwar Sylvia, Tiara Togi Sinurat , Andre Ulfa Hasnita Usman Usman Verawati, Iin