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All Journal Jurnal Ilmu Ternak Jurnal Pengabdian Masyarakat Fakultas Teknik: Jurnal Abditek Indonesian Journal of Physics (IJP) BULETIN FISIKA Pastura : Jurnal Ilmu Tumbuhan Pakan Ternak
Irfan Dwi Aditya
Jurusan Fisika, Fakultas Matematika Dan Ilmu Pengetahuan Alam, Institut Teknologi Bandung, Jl. Ganesha No. 10, Bandung, 40132, Indonesia
Agriculture, Biological Sciences & Forestry Humanities Astronomy Biochemistry, Genetics & Molecular Biology Computer Science & IT Earth & Planetary Sciences Education Electrical & Electronics Engineering Energy Engineering Materials Science & Nanotechnology Mechanical Engineering Medicine & Pharmacology Physics Veterinary Other

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Electronic and Surface Properties of Aluminum (111) Surface Modified by Interstitial and Substitutional Titanium Incorporation Irfan Dwi Aditya
Indonesian Journal of Physics Vol 34 No 1 (2023): vol 34 no 1 2023
Publisher : Institut Teknologi Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5614/itb.ijp.2023.34.1.3

Abstract

This study investigates the influence of interstitial and substitutional titanium atoms on the electronic properties of aluminum surfaces using density functional theory (DFT). The study focuses on three variables: the presence and arrangement of Ti interstitials on the aluminum surface, the behavior of Ti substitutional and interstitial impurities, and the energetic stability and structural properties of these systems. Multiple DFT methods are employed to derive conclusions regarding the impact of these variables on the surface properties of aluminum. The study provides valuable insights into how different states of interstitial and substitutional Ti can alter the physical characteristics and performance behaviors of the aluminum surface. The understanding of these effects could enable engineers to design more efficient materials with enhanced properties suitable for various industries.
The Utilization and Optimization of Histogram of Oriented Gradients and Machine Learning in Face Recognition System Rachmat, Muhammad Ervandy; Aditya, Irfan Dwi; Muttaqien, Fahdzi
Indonesian Journal of Physics Vol 34 No 2 (2023): vol 34 no 2 2023
Publisher : Institut Teknologi Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5614/itb.ijp.2023.34.2.4

Abstract

Computer science and technology development in recent years has experienced great developments. This time, some types of technology digitise almost everything related to human life, including facial recognition. In recent years, various methods for recognising human faces have developed. One of them is using the Histogram of Oriented Gradients (HOG). On this occasion, an image processing system will be designed to recognise human faces using Histograms of Oriented Gradients (HOG) and machine learning such as Convolutional Neural Networks (CNN) and Support Vector Machines (SVM). Detects the winking of the face, using computer-recognisable points in the eye area from 68 facial landmarks, so from these results, the distance between the upper and lower eyelids can be measured. If the distance (in pixels) is small enough, it can be interpreted as a wink. In addition, it is also limited by the distance of faces that can be detected to blink. In the end, if a recognised face blinks are detected, the time and date will be recorded. It will then open a solenoid lock using serial communication via Arduino Uno to become a security system. From 100 facial photos and 207 blink tests, 89.86% found that the computer could detect a "True Positive" wink. Besides, this facial recognition system's recommended tolerance parameter value is between 0.42 and 0.48.
Study of Nitrogen Nutrient Absorption and Forage Production in Kalopo Plants (Calopogonium mucunoides) Triputra, Kustiawan; Mansyur, Mansyur; Susilawati, Iin; Aditya, Irfan Dwi
Jurnal Ilmu Ternak Universitas Padjadjaran Vol 25, No 1 (2025): Volume 25 No. 1 Maret 2025
Publisher : Fakultas Peternakan, Universitas Padjadjaran

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24198/jit.v25i1.53762

Abstract

AbstractThis research aims to evaluate differences in soil nitrogen content, nitrogen absorption by plants, and forage production of Calopogonium mucunoides plants grown on andosol and ultisol soils during a 90-day planting period. The research method used was experimental, with treatment factors in the soil type (andosol and ultisol). The parameters observed included the soil’s moisture, temperature, pH, nitrogen content, and the plant’s nitrogen content and forage production. The results showed that Andosol's average soil moisture value (53.61%) was higher than Ultisol (43.68%). The soil temperature of Ultisol (24.34°C) tends to be higher than Andosol (23.36°C). Andosol soil pH (5.04) exceeds Ultisol's (4.87). The soil nitrogen content in Andosol (4,838%) is higher than in Ultisol (4,058%). The nitrogen content in plant tissue in both soil types is relatively the same, namely (2.423%) for andosol soil and (2.523%) for ultisol soil. However, forage production on Andosol (42.65 g/pot fresh weight; 11.85 g/pot dry weight) was almost 2 times higher than Ultisol (21.75 g/pot fresh weight; 5.907 g/pot dry weight). Nitrogen uptake in andosol soil is 0.247 grams/pot, higher than in ultisol soil, 0.149 grams/pot. In conclusion, Andosol is more optimal for the growth of C. mongoides in forage production.
Studi Penyerapan Hara Nitrogen dan Produksi Hijauan pada Tanaman Legum Sentro (Centrosema pubescens) Adinda Tri Asrini; Mansyur; Iin Susilawati; Irfan Dwi Aditya
Pastura: Jurnal Ilmu Tumbuhan Pakan Ternak Vol. 14 No. 1 (2024): Pastura Vol. 14 No. 1 Tahun 2024
Publisher : Himpunan Ilmuwan dan Tumbuhan Pakan Indonesia (HITPI) dan Fakultas Peternakan Universitas Udayanad

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

Research on the study of nitrogen nutrient absorption and forage production in Centrosema pubescens, legume plants was conducted in July-October 2023 located in the Student Activity Unit of the Poultry Profession Group, Forage Crop Laboratory, and Ruminant Animal Nutrition and Forage Chemistry Laboratory, Faculty of Animal Husbandry, Padjadjaran University, Sumedang Regency, West Java Province. The purposeof this study was to determine the absorption of nitrogen nutrients and forage production from Centrosema pubescens legumes. The objects used in this study were 40 pots of Centrosema pubescens plants using two types of andosol and ultisol soils. The study was conducted using an experimental research method consisting of mean, standard deviation, and a t-test. The results of the t-test analysis showed that the production of fresh forage in andosol soil (4.893 g) and ultisol soil (5.950 g) as well as the production of dry forage in andosol soil (4.533 g) and ultisol soil (5.610 g) were not significantly different. Likewise, the absorption of nitrogen nutrients planted on andosol soil (0.132%) and ultisol soil (0.178%) with results that were not significantly different. The results of the study can be concluded that Centrosema pubescens legume plants can be planted on both types of soil because there is no significant difference in either forage production or nitrogen absorption. ABSTRAK Penelitian mengenai studi penyerapan hara nitrogen dan produksi hijauan pada tanaman legum sentro(Centrosema pubescens), dilakukan pada bulan Juli-Oktober 2023 yang berlokasi di Unit Kegiatan Mahasiswa Kelompok Profesi Ternak Unggas, Laboratorium Tanaman Makanan Ternak, dan Laboratorium Nutrisi Ternak Ruminansia dan Kimia Makanan Ternak Fakultas Peternakan Universitas Padjadjaran, Kabupaten Sumedang, Provinsi Jawa Barat. Tujuan dilakukannya penelitian ini adalah untuk mengetahui penyerapanhara nitrogen dan produksi hijauan dari legum sentro. Objek yang digunakan dalam penelitian ini yaitu 40 pot tanaman Centrosema pubescens dengan menggunakan dua jenis tanah andosol dan ultisol. Penelitian dilakukan dengan menggunakan metode penelitian eksperimental yang terdiri dari mean, standar deviasi, dan uji t. Hasil analisis uji t menunjukkan bahwa pada produksi hijauan segar tanah andosol (4,893 g) dan tanah ultisol (5,950 g) serta produksi hijauan kering tanah andosol (4,533 g) dan tanah ultisol (5,610 g) tidak berbeda nyata. Begitu pula dengan penyerapan hara nitrogen yang ditanam pada tanah andosol (0,132%) dan tanah ultisol (0,178%) dengan hasil yang tidak berbeda nyata. Hasil dari penelitian dapat disimpulkan bahwa tanaman legum sentro dapat ditanam pada kedua jenis tanah karena tidak adanya perbedaan yang nyata baik pada produksi hijauan maupun pada serapan nitrogen.
Pembangunan Model Stasiun Pengisian Motor Listrik Bertenaga Panel Surya untuk Ojek Motor Listrik dan Umum di Area Sarana Olahraga Ganesha ITB Fariz, Alvin; Kinasih Gusti, Reksa Akbar; Rusman Nuryadin, Ramdhan; Hisyam Prakoso, Mukhammad; Haidar Aziz, Muhammad; Pradipto, Abdul Muizz; Dwi Aditya, Irfan; Yandri, Valdi Rizki; Hidayat, Rahmat
Jurnal Pengabdian Masyarakat Fakultas Teknik : Jurnal Abditek Vol. 6 No. 01 (2026): Jurnal Pengabdian Masyarakat Fakultas Teknik: Jurnal Abditek
Publisher : LPPM Universitas Negeri Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21009/Abditek.061.06

Abstract

Dalam kegiatan pengabdian masyarakat kali ini telah dibuat model pengisian baterai motor listrik (molis) yang bersumber dari Pembangkit Listrik Tenaga Surya (PLTS) mandiri (disingkat sebagai SPML-PS), yang dibangun bersifat off-grid, untuk dipergunakan oleh komunitas ojek molis dan masyarakat umum di kawasan Sarana Olahraga Ganesha (Saraga), Institut Teknologi Bandung (ITB), Bandung. Penggunaan sumber listrik yang berasal dari energi baru terbarukan (EBT), seperti energi surya, merupakan bentuk pemanfaatan energi hijau secara utuh, yang tidak hanya mengurangi emisi gas CO2 dari kendaraan bermotor tetapi juga pengurangan penggunaan energi fosil. Model SPML-PS yang dibangun terdiri dari dengan panel surya (dengan kapasitas daya total 900 Wp), baterai listrik penyimpan berkapasitas 2,4 kWh, pengontrol daya berjenis Maximum Power Point Tracking (MPPT) terintegrasi dengan sebuah inverter arus searah (DC) ke arus bolak-balik (AC). SPML-PS ini dimonitor dengan memanfaatkan teknologi Internet of Things (IoT) berbasis internet awan (cloud internet) sehingga dapat dicek terlebih dahulu ketersediaan listriknya secara online oleh pengguna setiap saat dari mana saja. Dengan spesifikasi tersebut, SPML ini dapat dipergunakan untuk mengisi dua motor listrik atau lebih per hari, bergantung pada intensitas matahari. Pemasangan dan pengujian SPML-PS ini dilaksanakan dari bulan Oktober hingga November 2025. SPML-PS ini diresmikan oleh Direktur Pengabdian Masyarakat dan Layanan Kepakaran (DPMK) ITB pada tanggal 20 November 2025. Kegiatan ini juga menunjukkan bahwa SPML-PS semacam ini dapat dibangun dan dioperasikan secara swa-kelola oleh individu, komunitas, usaha kecil-menengah ataupun koperasi.
Design and Construction of a Portable and Real-Time Monitoring System Based on the Internet of Things (IoT) for CO2 Gas Leaks Novia Masni Dwi Putri; Abdul Muid; Nina Siti Aminah; Irfan Dwi Aditya
BULETIN FISIKA Vol. 27 No. 2 (2026): BULETIN FISIKA
Publisher : Departement of Physics Faculty of Mathematics and Natural Sciences, and Institute of Research and Community Services Udayana University, Kampus Bukit Jimbaran Badung Bali

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24843/BF.2026.v27.i02.p01

Abstract

Carbon dioxide (CO₂) is the second most abundant contributor to the greenhouse effect after water vapor. Its atmospheric concentration has continued to rise over the past decade, correlating with the increase in global average temperature. Carbon Capture and Storage (CCS) is a technological approach designed to reduce CO₂ emissions by capturing CO₂ from industrial sources, transporting it to designated sites, and storing it securely. Continuous monitoring of CO₂ levels plays a critical role in CCS operations to ensure that stored CO₂ does not leak back into the atmosphere. This study presents a portable, real-time monitoring system for detecting CO₂ leakage using an MG-811 sensor integrated with an Internet of Things (IoT) platform. The system utilizes long-range communication networks for data transmission, enabling real-time visualization and analysis. In contrast to previous research, the proposed system not only displays concentration data but also includes an early warning feature and user-friendly visualization. It is powered by solar energy, allowing autonomous operation in remote areas.The results demonstrate that the sensor responds effectively to variations in gas concentration and environmental parameters. The system provides leakage vulnerability alerts using three categories: SAFE, ALERT, and DANGER. This approach enables faster identification of potential CO₂ leakage, supporting earlier and more effective mitigation actions.
Co-Authors Abdul Muid Adinda Tri Asrini Fariz, Alvin Haidar Aziz, Muhammad Hisyam Prakoso, Mukhammad Iin Susilawati Iin Susilawati Kinasih Gusti, Reksa Akbar Mansyur Mansyur Mansyur Muttaqien, Fahdzi Nina Siti Aminah Novia Masni Dwi Putri Pradipto, Abdul Muizz Rachmat, Muhammad Ervandy Rahmat Hidayat Rusman Nuryadin, Ramdhan Triputra, Kustiawan Valdi Rizki Yandri