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All Journal International Journal of Evaluation and Research in Education (IJERE) BERKALA FISIKA Jurnal Penelitian dan Pembelajaran Fisika POSITRON Jurnal Pengajaran MIPA Komunikasi Fisika Indonesia Jurnal Pembelajaran MIPA Jurnal Sosioteknologi Jurnal Fisika Unand Setrum : Sistem Kendali-Tenaga-elektronika-telekomunikasi-komputer Jurnal Aplikasi Fisika JFA (Jurnal Fisika dan Aplikasinya) Jurnal Pendidikan Fisika Jurnal Edu Research JPPPF (Jurnal Penelitian dan Pengembangan Pendidikan Fisika) Jurnal Penelitian Pendidikan IPA (JPPIPA) Indonesian Journal of Science and Mathematics Education Jurnal Biologi Tropis JSKK (Jurnal Sains Keolahragaan dan Kesehatan) International Journal of Research in Counseling and Education JURNAL EKSAKTA PENDIDIKAN (JEP) JURNAL PENDIDIKAN TAMBUSAI Global Conference Index Jurnal Ilmu Fisika Risalah Fisika Pelita Eksakta Sainstek : Jurnal Sains dan Teknologi Indonesian Journal of Electrical Engineering and Computer Science PAKAR Pendidikan Science and Environmental Journals for Postgraduate Pillar of Physics Education : Jurnal Berkala Ilmiah Pendidikan Fisika Pillar of Physics: Jurnal Berkala Ilmiah Fisika BIOCHEPHY: Journal of Science Education Journal of Comprehensive Science Applied Engineering, Innovation, and Technology Journal of Experimental and Applied Physics
Yulkifli Yulkifli
Physics Department, Faculty Of Mathematics And Natural Science, Universitas Negeri Padang, Jl. Prof. Dr. Hamka Air Tawar Padang, Sumatera Barat 25131, Indonesia
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Flood Early Warning System Using Ultrasonic and Rainfall Sensors IoT-Assisted with Smartphone Display Ramadhiani, Dhea Dinda; Yulkifli, Yulkifli
Journal of Experimental and Applied Physics Vol 1 No 1 (2023): June Edition
Publisher : Department of Physics, Universitas Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/jeap.v1i1.4

Abstract

The increasing incidence of floods in Indonesia every year is in line with the losses they incur, thus requiring preventive measures such as an early warning system that is more effective than conventional systems. This early warning system uses Internet of Thing (IoT) technology which utilizes the internet so that information on potential floods can be accessed in real time on a smartphone and provides an alarm according to the potential for flooding obtained from two flood indicator data, namely rainfall and water level. This study uses NodeMCU ESP8266 as a microcontroller to read and process data from the ultrasonic HC-SR04 to detect water levels and tipping buckets to detect rainfall. The IoT system that is connected to the internet then reads and sends data that is processed by the microcontroller to be displayed on a smartphone via the Blynk application. Sensor testing was carried out by varying 10 data to obtain an average relative accuracy of 99.28% on ultrasonic and an average relative accuracy of 98.75% on tipping buckets. Overall, the system works well and provides accurate information if it is connected to the internet.
Hydroponic Plant Nutrition Measurements System using Display Smartphone Internet Based of Things Dwina Melisa; Asrizal, Asrizal; Yulkifli, Yulkifli; Hufri, Hufri; Amir, Harman
Journal of Experimental and Applied Physics Vol 2 No 1 (2024): March Edition
Publisher : Department of Physics, Universitas Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/jeap.v2i1.38

Abstract

Hydroponics is an alternative for people who want to garden, but don't have enough space to grow crops. The most important issue that must be considered in cultivation is the provision of sufficient nutrients for plants. Lack of nutritional value results in less maximum yields. Nutritional measurements can be carried out without having to go to the cultivation site. The purpose of this study was to determine the performance specifications of the nutrient measurement system components for hydroponic plants. Determine the precision and accuracy of the nutrient measurement system on the results of limited-scale tests and field-scale test results. This type of research is engineering research. The data analysis technique used is descriptive data analysis and error analysis. From the data analysis it can be stated that three research results are first, the specification of system components includes sensor performance, ESP8266, LCD, Blynk. Second, the precision of the average nutrition on a limited scale is 99.97% and the average accuracy is 99.14%. Third, precision of nutrition on a field scale is 99.47% and the average accuracy is 99.14%. Field-scale test results were carried out for 3 days to obtain varied data. For cultivators of hydroponic plants it is useful for measuring nutritional value so they no longer make measurements manually.
Design and Implementation of Intravenous Infusion Monitoring System Based on Wireless Sensor Network with Smartphone Display Teguh, Teguh Afrianda; yulkifli, Yulkifli
Journal of Experimental and Applied Physics Vol 2 No 1 (2024): March Edition
Publisher : Department of Physics, Universitas Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/jeap.v2i1.42

Abstract

This research introduces a Wireless Sensor Network (WSN) based infusion monitoring system utilizing Internet of Things (IoT) technology. Infusion management is critical in healthcare, but manual supervision often lacks accuracy and control. Through the use of optocoupler and load cell sensors, this system enables automated calculation of the infusion drop rate per minute and evaluation of the remaining fluid percentage. In this study, tests were conducted using optocoupler sensors to calculate the drop rate per minute and load cell sensors to measure the remaining fluid percentage. Measurement results are monitored via smartphone, allowing healthcare professionals easy and rapid access to data. Furthermore, the innovation of this system lies in the application of Internet of Things (IoT) technology, enabling remote control through Wireless Sensor Network (WSN). Thus, one nurse can oversee multiple infusions using just one smartphone. The testing results demonstrate a high level of accuracy, with an average precision rate of 97% for drop rate measurements and 93% for the remaining fluid percentage measurements. This system offers an efficient and controlled solution for infusion fluid management, ensuring optimal healthcare services for patients. By integrating IoT and WSN technologies, this research paves the way for the development of more advanced and connected infusion monitoring systems, supporting enhanced patient care in the era of globalized healthcare.
Design and Construction of A 3-Dimensional Vibration Measurment Tool Using Accelerometer Sensors Based On The IoT For Implementations of Building Structures Gabe, Totop; Yulkifli, Yulkifli; Yohandri, Yohandri; Ahadi, Suaidi
Journal of Experimental and Applied Physics Vol 2 No 2 (2024): June Edition
Publisher : Department of Physics, Universitas Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/jeap.v2i2.55

Abstract

The building structure plays a crucial role in distributing the loads exerted by the building onto the ground, ensuring its strength to prevent collapse or damage. A common form of building damage is cracking due to vibrations. These vibrations can originate from both inside and outside the building, often at low frequencies. To address this, a vibration measuring instrument needs to be designed using a 3-Dimensional Accelerometer sensor to facilitate easier detection and data acquisition, thereby minimizing errors in measuring low vibrations caused by human activities that impact the durability of building structures. The research focuses on developing a tool to measure 3-dimensional vibrations in buildings using an Internet of Things (IoT)-based accelerometer sensor. This engineering research aims to design a 3-dimensional vibration measuring instrument. The resulting design includes performance specifications and system design specifications. The system's performance specifications cover the electronic circuit of the tool and the design of the measurement value monitoring display. The system employs the MPU6050 sensor to measure vibrations, with Arduino Uno as the main microcontroller and NodeMCU ESP32 for transmitting measurement data from Arduino to the web server. Experimental tests were conducted to measure vibration frequency by repeatedly dropping a 100-gram load from a height of 70 cm onto a wooden table. The load was dropped 10 times, maintaining a 2 cm distance from the coordinates of the measuring device. The experiments provided real-time measurement results, showing varying frequencies each second. The device successfully detected very low vibrations, with a minimum recorded frequency of 11.26 mHz and a peak of 93.18 mHz in the sixth experiment. The varying results across experiments were influenced by factors such as measurement sensitivity, filtering, sampling frequency, calibration, data processing, and noise minimization. The analysis confirmed that the tool could detect vibrations every second with high sensitivity, making it suitable for real-time detection of various low-frequency vibrations under consistent load conditions
Comparison of Power Absorption Effectiveness of Dynamic Solar Panels and Static Solar Panels at an Angle of 15° Fauzi, Wulan Aulia; Mairizwan, Mairizwan; Yulkifli, Yulkifli
Journal of Experimental and Applied Physics Vol 2 No 2 (2024): June Edition
Publisher : Department of Physics, Universitas Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/jeap.v2i2.56

Abstract

This study aims to determine the performance specifications and design of the measurement system so that it can measure the effectiveness of the two panel systems. The performance specifications of this system use 2 20Wp solar panels for both systems, namely static solar panels and dynamic systems, namely dual-axis solar trackers. Voltage and current measurements use INA219 sensors and are displayed and stored using a serial Bluetooth terminal as a data logger. Design specifications for The results of this linearity test show very satisfactory results in terms of measurements on voltage and current parameters, namely the R-Square value, which reaches 1 and 0.99. The accuracy of the INA219 sensor is 97.78% for voltage and 96.21% for current. The precision of the INA219 sensor for voltage is 100% and 91% for current. Based on these data, it can be said that this tool works well. The measurement results of the increase in solar panel power absorption are compared between the static solar panel system at an angle of 15 ° to the north and the dynamic solar panel system with the dua- axis solar tracker method. The power generated by the static solar panel system is 3229.81 watts, and the power generated by the dual-axis solar tracker system is 3865.92 watts, with a percentage increase in power of 19.7%. It can be concluded that the dual-axis solar tracker system is more efficient in generating power compared to static systems.
Compact Spectrophotometer Using TEMT600 Sensor for Protein Concentration Measurement Matondang, Anggun Sisri Br.; Yulkifli, Yulkifli; Mairizwan, Mairizwan; Sari, Mona Berlian
Journal of Experimental and Applied Physics Vol 2 No 4 (2024): December Edition
Publisher : Department of Physics, Universitas Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/jeap.v2i4.74

Abstract

A simple spectrophotometer utilizing a white LED light source (520 nm wavelength) and a TEMT600 light sensor has been successfully developed to measure the concentration and absorbance of protein solutions. This device demonstrated an impressive average measurement accuracy of 96.26% for concentration and 95.97% for absorbance, making it highly effective for protein analysis. Despite its reliability, certain deviations were observed in the measurement results, primarily attributed to unpredictable environmental fluctuations and suboptimal sample preparation. These factors contributed to an average deviation of 3.74% for concentration and 4.25% for absorbance. While these deviations are relatively minimal and within an acceptable range, they highlight areas for potential improvement in future designs. Nevertheless, the tool is considered suitable for accurately measuring protein solution concentration and absorbance, proving its capability for laboratory or educational purposes. Its simplicity and cost-effectiveness make it a valuable device for routine protein analysis
Simulation of Silicon-Rubber and Boric Acid Composite Type Neutron Shields Thermal Absorpstion Efficiency Using NGCal Software Junita, Novia; Sari, Mona Berlian; Yulkifli, Yulkifli; Mairizwan, Mairizwan
Journal of Experimental and Applied Physics Vol 2 No 4 (2024): December Edition
Publisher : Department of Physics, Universitas Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/jeap.v2i4.75

Abstract

Perisai neutron termal merupakan suatu struktur atau material yang memegang peranan penting dalam proteksi radiasi neutron termal untuk menghindari dampak negatif dari paparan radiasi secara langsung, baik terhadap lingkungan maupun kesehatan manusia. Pada penelitian ini, digunakan silikon-karet sebagai material utama perisai neutron, sedangkan asam borat berfungsi sebagai penyerap neutron termal, sehingga keakuratan informasi mengenai sifat redaman dan proteksi perisai neutron yang dirancang menjadi sangat penting. Beberapa parameter perisai radiasi yang harus dievaluasi dalam menentukan kinerja material perisai neutron yang difabrikasi antara lain faktor redaman massa, faktor redaman linier, dan lapisan nilai setengah. Perangkat lunak komputasi NGCal digunakan untuk mensimulasikan sifat dan parameter material perisai. Berdasarkan perhitungan yang dilakukan, dapat disimpulkan bahwa perisai dengan efisiensi tinggi adalah perisai dengan penggunaan rasio sorben yang lebih tinggi yaitu asam borat, sedangkan apabila rasio karet silikon lebih besar dari asam borat maka tingkat efisiensi penyerapan menurun, tetapi fleksibilitas mekanis perisai akan semakin baik. Ketebalan perisai neutron berhubungan langsung dengan nilai MAC dan LAC, dimana semakin tebal perisai maka nilai MAC dan LAC akan semakin tinggi, hal ini menyebabkan efisiensi penyerapan neutron termal oleh perisai neutron akan semakin meningkat apabila asam borat mendominasi pada komposit, namun apabila ketebalan perisai didominasi oleh karet silikon maka efisiensinya akan semakin menurun.
Design of a Free Fall Motion Experiment Using E18-D80NK Proximity and HC-SR04 Ultrasonic Sensors: An IoT-Based Approach Yudha, Fauzan Syafril; Yulkifli, Yulkifli; Asrizal, Asrizal; Darvina, Yenni
Journal of Experimental and Applied Physics Vol 2 No 4 (2024): December Edition
Publisher : Department of Physics, Universitas Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/jeap.v2i4.76

Abstract

Electronics plays an important role in science, especially in the advancement of school laboratory equipment which is one of the pillars of education. Many laboratories equipment currently still use manual methods. This research aims to develop an IoT-based free fall motion measurement system that displays measurement results automatically. This system uses E18-D0NK proximity sensor and HC-SR04 ultrasonic based on ESP32. This research focuses on engineering a free fall motion measurement tool with the method of dropping objects. Data collection is done through direct and indirect approaches. Direct measurement involves reading the value on the smartphone screen, while indirect measurement is used to evaluate the level of accuracy and precision of the digital measurement system compared to conventional methods. The data obtained was statistically analyzed and represented in graphical form to provide a comprehensive understanding of the performance of the developed system. From the data analysis, there are two important findings. First, the measurement system includes an E18-D0NK proximity sensor for starting and stopping the movement of objects and an HC-SR04 ultrasonic sensor for measuring height, all housed in a toolbox. Second, the system shows excellent average accuracy and average precision.
Impedance Tube Method Based On Arduino For Material Acoustic Measurement Anwar, Suci; Yohandri, Yohandri; Darvina, Yenni; Yulkifli, Yulkifli
Journal of Experimental and Applied Physics Vol 3 No 1 (2025): March Edition
Publisher : Department of Physics, Universitas Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/jeap.v3i1.89

Abstract

Acoustics play a crucial role in advancing technology and industry by mitigating moise, which is an uwanted byproduct of many devices. However, existing tools for testing acoustic properties often lack automation and calibration, which limits their realibility and usability. This study introduces the development of a test device designed to measure the sound absorption coefficient of materials using the two-microphone impedance tube method. The device incorporates a PVC tube, an Arduino Nano Microcontroller, and an OLED display for real-time data analysis and visualization. The proposed device offers simplicity, portability, and improved measurement accuracy compared to existing solutions. The method involves measuring sound intensity and absorption coefficients using direct dan indirect techniques. Experimentals results demonstrate that the device achieves an average accuracy rate of 20.38%, with consistent absorption coefficient values across repeated tests. The frequency range tested aligns with the performance limits of the device, further confirming its reliability. In conclusion, the developed device provides a practical and reliable solution for testing acoustic materials, addressing the limitations of previous methods.
Pembuatan Media Educational Game Monopoli untuk Memfasilitasi Kemampuan Berpikir Kreatif Siswa SMA pada Materi Pemanasan Global Nur Nahdia, Vivi; Festiyed, Festiyed; Yulkifli, Yulkifli; Stivani Suherman, Dea
Jurnal Pendidikan Tambusai Vol. 8 No. 3 (2024)
Publisher : LPPM Universitas Pahlawan Tuanku Tambusai, Riau, Indonesia

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

Abstract

Proyek ini dimaksudkan untuk merancang permainan edukatif berbasis monopoli sebagai sumber daya terbuka untuk membantu siswa sekolah menengah berpikir kritis tentang tantangan pemanasan global. Model pengembangan sepuluh tahap Dick & Carye adalah pendekatan yang digunakan dalam penelitian ini. Menilai tingkat validitas dan utilitas hasil akhir adalah tujuan utama dari penelitian ini. Dengan skor validasi 0,92 dan kategori sangat valid, hasil penelitian media permainan edukatif monopoli ini memiliki tingkat kepraktisan. Eksperimen skala kecil yang menggunakan kuesioner yang diumumkan kepada siswa dilakukan untuk menentukan tingkat kepraktisan. Analisis kuesioner kepraktisan menemukan berbagai kepraktisan. Berdasarkan hasil uji validasi dan uji kepraktisan, dapat ditentukan bahwa media permainan edukatif monopoli ini valid dan praktis sebagai media pembelajaran yang memfasilitasi kreativitas siswa tentang konten pemanasan global.
Co-Authors - Asrizal -, Vauzia - Abdul Razak Ade Usra Berli Afrianda, Teguh Ahmad Fauzi Ainur Rizki, Iqbal Aldri Frinaldi Alizar, Alizar Alwi Nofriandi Aminuyati Andi Alatas, Andi Anggraini Anggraini Anwar, Suci Armiati Armiati Asrizal Asrizal A Audia, Washilla Aulia Asman Az-Zahra, Khalishah Raudhatul Azmi Asra, Azmi Dasman Lanin Delvi Ayu Wulandari Desmiwati, Riti Didik Hariyanto Djusmaini Djamas Djusmaini Djamas Djusmaini Djamas Dona, Afrini Dwina Melisa Elisia, Rini Fadilla Meidita Fanny Rahmatina Rahim Fauzi, Wulan Aulia Febrina, Suci Festiyed Fevria, Resti Fevria, Resti - Fimatesa Windari Fitra Netti Frans Rizal Agustiyanto Gabe, Totop Habibi Putra Hamid, Bushra Harman Amir Hatthoahira . Heron Tarigan Hufri Hufri Ilyas Muhammad Isa Indang Dewata Insani, Munadia Irwan Irwan Isa, Ilyas Muhammad Junita, Novia Khoirun Nisa Kitty Mulyati Chania Lily Handayani Mairizwan, Mairizwan Maria Idayu Matondang, Anggun Sisri Br. Md Isa, Illyas Melia Vivi Ningrum Mimo Putra Ardiansyah Mitra Djamal Muhammad Irfan Muhammad Rivai Murtiani Murtiani Mutia Oktaviani, Annisa Mutia Risma Nadi Suprapto Nadya Pratiwi Nofi Yendri Sudiar Nofi Yendri Sudiar Nur Anisa Sati’at Nur Nahdia, Vivi Nur Suci Eka Putri Nurry Putri Tissos Nurul Ihsan Pramita, Rissa Pratama, Rayvol Dion Pratiwi, Nadya Puja Kahar Putri Diana Putri Oktavia Putri, Santi Diana Putri, Sylvia Delfi Mardiana Putri, Widya Janatul Rahmadani, Febbi Rahmondia N. Setiadi Ramadhiani, Dhea Dinda Rambe, Indah Anggraini Ramli Ramli Rembrandt, Rembrandt Renol Afrizon Renti Surya Retno Riyaningtyas Rezy Prima Riren Rostari Rissa Pramita Roni Jarlis Ruci Ardi Samudra, Elmi Yanto Adhar Sania, Hani Sari, Mona Berlian Sati’at, Nur Anisa Septian Rahman Hakim Shabrina Amalia Siregar, Dewi Rahmadani Sri Mutiar, Sri Stivani Suherman, Dea Suaidi Ahadi Susalam, Malikil Kudus Suyatno, Suyatno Teguh, Teguh Afrianda Ulianas, Alizar Usmeldi Usmeldi Vauzia, Vauzia Venny Haris Violita Violita Widya Janatul Putri Widyaningrum Indrasari wita nirmala Yanti, Nurfitriza Yardani Adi Cosra Yenni Darvina Yohandri Yohandri Bow Yolanda . Yolanda Karinia Yosa aulya putri Yudha, Fauzan Syafril Yusri, Wilda Triputri Zul Anwar Zul Fahmi, Hafizhuddin Zulhendri Kamus Zulpadrianto Z Zurian Affandi