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All Journal Jurnal Penelitian Fisika dan Aplikasinya (JPFA) Jurnal Keteknikan Pertanian Jurnal Sains dan Teknologi TELKOMNIKA (Telecommunication Computing Electronics and Control) GRADIEN Jurnal Fisika Unand WARTA ELKOMIKA: Jurnal Teknik Energi Elektrik, Teknik Telekomunikasi, & Teknik Elektronika JOURNAL ONLINE OF PHYSICS JPSE (Journal of Physical Science and Engineering) Panrita Abdi - Jurnal Pengabdian pada Masyarakat Spektra: Jurnal Fisika dan Aplikasinya Martabe : Jurnal Pengabdian Kepada Masyarakat Jurnal Penelitian dan Pengabdian Kepada Masyarakat UNSIQ Jurnal Pendidikan Fisika dan Teknologi Abdimas Umtas : Jurnal Pengabdian kepada Masyarakat PengabdianMu: Jurnal Ilmiah Pengabdian kepada Masyarakat Indonesian Physical Review Jurnal Kumparan Fisika Al-Khidmat : Jurnal Ilmiah Pengabdian Kepada Masyarakat Abdi Dosen : Jurnal Pengabdian Pada Masyarakat Indonesian Journal of Electrical Engineering and Computer Science Jurnal Pengabdian Masyarakat Asia Yumary: Jurnal Pengabdian kepada Masyarakat Jurnal Inovasi Pengabdian Masyarakat Pendidikan PROSIDING SEMINAR NASIONAL FISIKA (E-JOURNAL) Indonesian Journal of Community Empowerment and Service
Riska Ekawita
Universitas Bengkulu
Religion Aerospace Engineering Agriculture, Biological Sciences & Forestry Arts Humanities Astronomy Computer Science & IT Earth & Planetary Sciences Economics, Econometrics & Finance Education Electrical & Electronics Engineering Energy Engineering Environmental Science Law, Crime, Criminology & Criminal Justice Materials Science & Nanotechnology Mathematics Physics Public Health Social Sciences Other

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The Influence of Wind Direction and Speed on Rainfall in Bengkulu City (2019-2023) Based on the Schmidt-Fergusson and Wind Rose Models Agustin, Rika Amelia; Ekawita, Riska; Supiyati, Supiyati; Alfando, Andre
Jurnal Pendidikan Fisika dan Teknologi (JPFT) Vol 11 No 1 (2025): January-June
Publisher : Department of Physics Education, Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jpft.v11i1.8749

Abstract

Increasingly extreme climate change has increased rainfall intensity and uncertainty of weather patterns in many parts of Indonesia, including Bengkulu City. This phenomenon affects rainfall patterns, the duration of the wet and dry seasons, and wind speed, all of which have an impact on various aspects of life. This study analyzes the effect of wind direction and speed on rainfall in Bengkulu City using the Schmidt-Fergusson, Wind Rose, and Multiple Linear Regression models, based on data from the Fatmawati Soekarno Bengkulu Meteorological Station in 2019-2023. The results of this study indicate that the dominant wind direction comes from the north, northeast, and southeast, with an average speed of 2.47 m/s, categorized as a weak wind according to the Beaufort scale. The highest annual rainfall was recorded in October 2022 at 600 mm. Based on the Schmidt-Fergusson classification, Bengkulu City is included in climate type A with a Q value = 0.1. Regression analysis shows that wind speed has a significant negative effect on rainfall indicating that wind speed has a negative effect, meaning that an increase in wind speed will cause a decrease in rainfall, while humidity has a positive effect, indicating that when air humidity increases, rainfall will also increase. The R² value of 32.7% indicates that the wind, temperature, pressure, and humidity variables explain some of the variation in rainfall. This finding emphasizes the importance of monitoring wind elements in the early warning system for extreme weather and supports hydrometeorological disaster risk mitigation planning in coastal areas vulnerable to climate change.
LEVERAGING THE UBIQUITOUS GPS SENSOR ON THE SMARTPHONES FOR ACCESSIBLE LAND SURVEYING Habibullah, Ahmad Dhuha; Yuliza, Elfi; Almadi, Ismail Fahmy; Intara, Yazid Ismi; Ekawita, Riska
Indonesian Physical Review Vol. 8 No. 2 (2025)
Publisher : Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/ipr.v8i2.361

Abstract

The Global Positioning System (GPS) is an essential tool in land surveying. GPS has become an alternative method of surveying that requires less manpower and less time. However, GPS devices are still expensive to buy, especially for students. On the other hand, almost every student has a smartphone with a built-in GPS sensor, so this GPS is certainly accessible to everyone with a smartphone. This study used a smartphone's GPS to conduct land surveying at the campus of Bengkulu University. This smartphone’s GPS was used to track various parameters such as coordinates, elevation, and distance between two or more points to calculate the area within the study area. The innovative method of using the built-in GPS sensor in smartphones will provide convenience for users and introduce simplified open-source software for the land measurement process. The measurement was calibrated using a conventional roll meter to verify the linear error by comparing the two measurements between the smartphone’s GPS and roll meter. The smartphone’s GPS reading was logged using GPS Waypoints and My Tracks, free Android applications on the Google Play store. This study's average error in measurements obtained using GPS on smartphones was 3.02%. This value is sufficient for the initial stage of low-cost land surveys and falls within ideal conditions for GPS measurements. Therefore, this article emphasizes the potential of smartphone GPS to optimize techniques in education and scientific investigations.
Preliminary Study on the Influence of Blade Shape and Quantity in Water Turbines using the INA219 Sensor SAGALA, MONAESA; MAHDALYA, ELLIN ERNITA; SIHOMBING, YOSIA PANDU; ULANDARI, TRESI PITRIA; SULISTIANI, EVI; YULIZA, ELFI; EKAWITA, RISKA
ELKOMIKA: Jurnal Teknik Energi Elektrik, Teknik Telekomunikasi, & Teknik Elektronika Vol 13, No 3: Published July 2025
Publisher : Institut Teknologi Nasional, Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26760/elkomika.v13i3.314

Abstract

The design of turbine blades plays a crucial role in enhancing the efficiency of converting the kinetic energy of water into electrical energy, particularly on a small scale. This study aims to evaluate the influence of blade shape and number on turbine performance, as well as to compare the accuracy of voltage measurements using an INA219 sensor based on Arduino Uno with a digital multimeter. Four blade shapes were tested: cylindrical, semi-cylindrical, concave oval, and flat plate, each configured with 4 and 8 blades. Tests were conducted under three water flow rate conditions (low, medium, and high) to observe the optimization process of turbine performance. The results showed that the cylindrical blade with 8 blades produced the highest voltage of 1.03 V at high flow rate. The average measurement difference between the sensor and the multimeter was ±0.015 V, indicating good accuracy. These findings confirm that the cylindrical blade is the most efficient, and the INA219 sensor based on Arduino is suitable for use in micro-hydro turbine voltage monitoring systems.
Peningkatan Kapasitas Ibu-Ibu Kelompok Tani Desa Malakoni, Enggano, Provinsi Bengkulu dalam pemenuhan kebutuhan sayuran melalui smart hidroponik dengan tenaga surya Muda Lubis, Ashar; Ekawita, Riska; Sipriyadi
Indonesian Journal of Community Empowerment and Service (ICOMES) Vol. 5 No. 1 (2025): June 2025
Publisher : UNIB Press

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33369/icomes.v5i1.41723

Abstract

Pulau Enggano,merupakan salah satu pulau terluar Indonesia yang terletak di Samudra Hindia. Salah satu permasalahan di daerah Pulau Enggano berkaitan dengan ketersediaan pangan khususnya sayuran. Tujuan dari kegiatan ini untuk melatih kelompok tani dalam budidaya sayuran smart hidroponik dengan energi surya. Kegiatan pengabdian masyarakat telah dilakukan bulan Agustus 2024 di Desa Malakoni, Enggano, pada 2 kelompok tani ibu-ibu yakni Enggano Makmur dan Melati Enggano. Kegiatan pengabdian ini dikuti lebih dari 30 orang peserta. Kegiatan diawali dari sosialisasi/pelatihan dengan metode komunikasi secara langsung dan peragaan budidaya sayuran hidroponik serta praktek langsung menggunakan alat dan bahan seperti benih sayuran, nampan plastik, rockwoll, netpot, nutrisi AB mix, dan lain-lain. Ketercapaian tujuan pelaksanaan kegiatan pengabdian ini mencapai 100% dimana kelompok tani mengikuti semua rangkaian kegiatan pengabdian dengan sangat baik, dan 95% yang diundang menghadiri kegiatan pelatihan. Dari kegiatan ini terlihat adanya peningkatan kapasitas dari peserta dalam budidaya sayuran dengan smart hidroponik. Hasil pre-test pengetahun kelompok tani tentang smart Hidroponik menunjukkan diangka 49%, naik menjadi 89% setelah kegiatan pengabdian. Kegiatan pengabdian ini dapat membantu meningkatkan kapasitas dan pengetahuan kelompok tani dalam budidaya sayuran hidroponik di daerah Enggano.
The Influence of Wind Dynamics and Longshore Currents on Shoreline Changes in the Lais Segment, North Bengkulu, Based on Seasonal Variations Supiyati; Ekawita, Riska; Johan, Septi; Dari, Evita Sri Wulan
JST (Jurnal Sains dan Teknologi) Vol. 14 No. 2 (2025): July
Publisher : Universitas Pendidikan Ganesha

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23887/jst-undiksha.v14i2.95817

Abstract

Pantai Lais mengalami perubahan garis pantai yang sangat cepat yang disebabkan abrasi dan sedimentasi. Penelitian ini bertujuan untuk mengidentifikasi karakteristik dinamika angin dan  Longshore  Current, dan pemetaan perubahan garis pantai di segmen Pantai Lais.  Penelitian ini merupakan penelitian kuantitatif-deskriptif. Subjek penelitian mencakup data oseanografi seperti kecepatan dan arah Longshore  Current, kecepatan angin, serta tinggi dan periode gelombang laut yang diperoleh melalui pengukuran langsung di lima titik pengamatan pada dua musim peralihan. Data yang sudah diperoleh kemudian dianalisis secara deskriptif dan kuantitatif. Temuan penelitian menunjukan perubahan garis pantai di segmen Lais sangat dipengaruhi oleh dinamika angin dan Longshore  Current, dimana angin adalah faktor utama pembangkit gelombang. Ketinggian gelombang laut akan menimbulkan gelombang pecah yang merupakan penyebab terbentuknya Longshore  Current. Ketinggian gelombang laut dan kuatnya energi gelombang menghantam dinding pantai, mengakibatkan pinggir pantai terabrasi. Material terabrasi ini akan ikut terbawa oleh Longshore  Current   sesuai dengan arah gerak arus mengalir, yang kemudian akan menumpuk di daerah yang kecepatan aliran arus lemah atau mengecil, sehingga terjadi sedimentasi. Rata-rata sedimentasi selama 10 tahun terakhir sebesar 10,60 meter/tahun, dengan sedimentasi tertinggi terjadi tahun 2017 sebesar 29,05. Sedangkan rata-rata abrasi selama 10 tahun terakhir 13,03 meter/tahun, dengan abrasi tertinggi tahun 2015 sebesar 20,5 m. Penelitian ini berimplikasi dalam perencanaan zona pesisir, terutama dalam mitigasi erosi pesisir, perencanaan ruang pesisir, dan perlindungan pemukiman serta infrastruktur yang rentan terhadap abrasi.
Administrative and Topographic Map of Kelurahan to Support Land Efficiency and Flood Mitigation Refrizon; Farid, Mochammad; Ekawita, Riska; Fauzi, Hera Wahyu; Anggria, Della Cici; Prasetyo, Rendi Dwi
Jurnal Pengabdian Masyarakat Vol. 5 No. 2 (2024): Jurnal Pengabdian Masyarakat
Publisher : Institut Teknologi dan Bisnis Asia Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32815/jpm.v5i2.1779

Abstract

Purpose: The community service activity by the University of Bengkulu Geophysics and Physics Team aimed to assist the community of Kandang Limun, Bengkulu City, by developing maps that display area boundaries and topographical elevations. The maps were intended to serve as easily accessible sources of information for the local community and to aid in planning and development efforts.Method: The methodology involved conducting a preliminary survey, collecting data, preparing software tools, and creating both boundary and topographic maps. A questionnaire was distributed to assess community satisfaction with the project.Practical Applications: The maps provide valuable information for local government and residents, serving as a resource for defining area boundaries and understanding topographical features. These maps are particularly useful for urban planning, land use, and community development initiatives.Conclusion: The creation and public display of administrative and topographical maps in the Kelurahan office have improved access to essential geographical information. This initiative supports better community planning and contributes to the informed development of the area, benefiting both the local government and residents.
PHYSICAL DISTANCING ALARM SYSTEM BASED ON PROXIMITY SENSOR AND MICROCONTROLLER Yuliza, Elfi; Ekawita, Riska; Vionita, Vionita; Fauzi, Muhammad Khafid; Sari, Vera Fuspita; Rahmayanti, Handika Dany
Indonesian Physical Review Vol. 4 No. 2 (2021)
Publisher : Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/ipr.v4i2.85

Abstract

Keeping an interaction distance between 1 to 2 m is one of the health protocols during the COVID-19 pandemic. This attempt was made to reduce the spread of the Coronavirus. On the other hand, this health protocol activity is often overlooked, whether intentionally or not. According to the mechanism of the Coronavirus spreading in the form of droplets that comes out during communication, sneezing, or coughing, maintaining distance can be the best effort to minimize the transmission of this virus. Therefore, the availability of a simple, accurate and user-friendly physical distancing alarm system could be a solution in the implementation of this health protocol. In this study, a prototype of a physical distancing alarm based on a distance sensor and a microcontroller in the form of an identity card was developed. Several steps are conducted in developing of this system, namely designing the instrumentation system and testing the performance of the system. System performance is tested through variations in the distance and angle of the objects. The measurement results show that the system can detect objects in front of the sensor up to a distance of 2.8m and an angle of  for a distance of 1m. The measurement using different angles of objects was performed for objects on the left and right sides of the sensor. In addition, a warning alarm will be on when the distance of the object exceeds the allowed distance.  
COMPARISON OF INFRARED AND OPTOCOUPLER SENSORS PERFORMANCE FOR LAB-SCALE RPM MEASUREMENT SYSTEM Afifah Amatullah, Elin Nur; Ekawita, Riska; Yuliza, Elfi
Indonesian Physical Review Vol. 5 No. 2 (2022)
Publisher : Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/ipr.v5i2.150

Abstract

In utilizing various alternative energy, generators are used to convert alternative energy into electrical energy, for example, biomass, wind, and hydroelectricity. Generally, the measurements made on the generators are rotational speed measurements in the form of revolutions per minute (RPM). In developing lab-scale alternative power sources, the availability of generators with complete quality and specifications is still minimal, including RPM capacity. Therefore, the measurement which can read the RPM accurately, digitally, and automatically is needed. However, the measurement tools available are still manual, not automatic, and prone to parallax errors. Hence, a digital and automatic RPM measurement was developed in this study. Two different sensors were used to develop digital RPM based on a microcontroller. The stages obtained started with electronic system development, calibration, and testing of lab-scale renewable energy systems. The measurement can be read from the infrared and optocoupler sensors on the Archimedes turbine. The measurement results showed that the use of the Optocoupler sensor is more accurate than the infrared sensor. This is based on the data obtained from calibration and testing results on the Archimedes turbine. This RPM measurement is digital and real-time.
PENDAMPINGAN PEMBUATAN PERANGKAT ALARM SOCIAL DISTANCING DALAM UPAYA MENINGKATKAN JIWA WIRAUSAHA ALUMNI FISIKA ., Supiyati; ., Suwarsono; Ekawita, Riska
Abdi Dosen : Jurnal Pengabdian Pada Masyarakat Vol. 5 No. 3 (2021): SEPTEMBER
Publisher : LPPM Univ. Ibn Khaldun Bogor

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (622.041 KB) | DOI: 10.32832/abdidos.v5i3.925

Abstract

Wabah Covid-19 telah menyebar di seluruh wilayah di indonesia termasuk juga Bengkulu. Selama ini banyaknya masyarakat di Kota Bengkulu yang tidak menjalankan protokol kesehatan, salah satunya social distancing. Tujuan dari pengabdian ini adalah memberikan edukasi pada masyarakat untuk menerapkan protokol kesehatan, salah satunya social distancing, sebagai upaya untuk mencega penularan covid-19, memberikan solusi peluang usaha yang memungkinkan di kondisi pandemi covid-19 dengan memberikan pengetahuan kepada alumni fisika cara berwirausaha di kondisi pandemi covid-19, dan memberikan pendampingan dan keterampilan pembuatan sistem alarm social distancing pada alumni fisika. Metode dalam kegiatan pengabdian pada masyarakat ini adalah pelatihan dan pendampingan. Hasil kegiatan menunjukan bahwa kegiatan pengabdian pada masyarakat dapat dilaksanakan dengan baik dan lancar. Berdasarkan pretest dan post-test yang telah dilakukan terjadi peningkatan pengetahuan para peserta 90%. Peserta kegiatan pengabdian telah memiliki pengetahuan dan pemahaman merangkai dan membuat program sistem alarm social distancing. Peserta telah memiliki pengetahuan berwirausaha, dengan telah tersedianya beberapa sistem alarm social distancing yang sudah di packing dan siap untuk di pasarkan.
PENINGKATAN SKILL MASYARAKAT DESA WISATA RINDU HATI DALAM MEMANFAATKAN ENERGI MATAHARI MENJADI ENERGI LISTRIK MENGGUNAKAN PANEL SURYA Yuliza, Elfi; Ekawita, Riska; Samdara, Rida
Martabe : Jurnal Pengabdian Kepada Masyarakat Vol 5, No 1 (2022): Martabe : Jurnal Pengabdian Kepada Masyarakat
Publisher : Universitas Muhammadiyah Tapanuli Selatan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31604/jpm.v5i1.391-398

Abstract

Rindu Hati Village, located in the Central Regency of Bengkulu, is one of the tourist villages in Bengkulu Province. This village has various natural tourist potentials such as waterfalls, expanses of plantations and rice fields, camping grounds, rafting, etc. However, access to electricity for this area is still very limited. It can be seen in the unavailability of streetlights on site, very limited lighting in tourist areas, etc. In fact, this area receives sunlight all day long throughout the year which can be applied for lighting using solar panels. The limited knowledge and skills of the community regarding the various variations of solar panel technology and the installation process are the reasons why this technology was not used. Therefore, in this service activity, various solar panel technologies were explained and training on their use, especially for tourism awareness groups in Rindu Hati village. This activity is divided into five stages, the first stage is exposure to the use of solar panel technology, followed by training on the installation of various forms of solar panels and the last stage installation solar panels for the lighting of the campsite. In addition, before and after the presentation and training, a questionnaire was handed out which aims to determine the public's knowledge of solar panel technology. The results of the questionnaire show that the public is already familiar with solar panels for producing electrical energy, but limitation in the form and variation. During the implementation of the activity, the community showed interest in using solar panels in their homes. In addition, this activity increases the knowledge and skills of the community in the use of solar energy by using solar panels for various purposes such as lighting and electricity for electronic devices in the household
Co-Authors Afifah Amatullah, Elin Nur Agustin, Rika Amelia Alfando, Andre Almadi, Ismail Fahmy Anggria, Della Cici anjasman, anjasman Bangun, Abel Melido Chandra Kurniawan Dari, Evita Sri Wulan Devi Permata Sari Elfi Yuliza Elfi Yuliza Endah Rahmawati Farid, Mochammad Fauzi, Hera Wahyu Fauzi, Muhammad Khafid Gunawan, Nur Aini Habibullah, Ahmad Dhuha Johan, Septi Khairurrijal Khairurrijal Lestari, Resma Puji Lestari, Widya Novia Lizalidiawati Lizalidiawati MAHDALYA, ELLIN ERNITA Maman Budiman Melisa, Wery Mikrajuddin Abdullah Muda Lubis, Ashar Muhammad Yuliansyah Putra Mutia Raudhatul Zahra Nasution, Ahmad Azmi Nolla Kusumawardani Okta Sari Rahmat Awaludin Salam Rahmayanti, Handika Dany Refrizon Rendi Dwi Prasetyo Rida Samdara Rida Samdara SAGALA, MONAESA Saputra, Rahmat Sari, Vera Fuspita Shalih Muhammad Abdul Azhim SIHOMBING, YOSIA PANDU Sipriyadi Suardi, Nursakinah Sudirman Sudirman SULISTIANI, EVI Sultan Nanda Alamsyah Supiyati . Suwarsono Suwarsono Suwarsono Suwarsono Ulandari, Tresi Pitria Vionita, Vionita Wery Melisa Yazid Ismi Intara Yazid Ismi Intara Yosia Pandu S Zafran Afif