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All Journal IPTEK The Journal of Engineering JFA (Jurnal Fisika dan Aplikasinya) Gravity : Jurnal Ilmiah Penelitian dan Pembelajaran Fisika Martabe : Jurnal Pengabdian Kepada Masyarakat AS-SABIQUN: Jurnal Pendidikan Islam Anak Usia Dini
Aris Widodo
Universitas Muhammadiyah Lamongan
Religion Agriculture, Biological Sciences & Forestry Arts Humanities Astronomy Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Decision Sciences, Operations Research & Management Earth & Planetary Sciences Education Electrical & Electronics Engineering Engineering Library & Information Science Materials Science & Nanotechnology Mechanical Engineering Physics Social Sciences Other

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The Influence of Multi-frequency Current Injection in Image Reconstruction for Two-Dimensional High-Speed Electrical Impedance Tomography (EIT) Aris Widodo; Agus Rubiyanto; Endarko Endarko
IPTEK The Journal of Engineering Vol 5, No 1 (2019)
Publisher : Lembaga Penelitian dan Pengabdian kepada Masyarakat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j23378557.v5i1.a5019

Abstract

The image reconstruction for two-dimensional high-speed Electrical Impedance Tomography (EIT) has been successfully studied with multi-frequency current injection. The aim of this study is to get the best image reconstruction under the influence of multi-frequency current injection of this EIT system. In this method, we used current injection at 1 mA with varies of frequency in the range 10 to 50 kHz injected at the practical phantoms with 16 electrodes. Polyvinyl chloride (PVC) cylinder was put in the practical phantom as the anomaly. Then, The boundary voltage of the practical phantom was measured by the voltage measurement circuit. After that, it processed in the computer with Gauss-Newton Algorithm to got image reconstruction. The result showed that the best image reconstruction was achieved at 10 kHz of frequency current injection. The best image reconstruction had more accuracy of shape, position and electrical properties of an anomaly in boundary phantom than another image reconstruction result.
Characterization of Cough Sounds Based on Measured Sound Pressure Levels from Arduino-Based MAX9814 Sound Sensor Aris widodo; Muktamar Cholifah Aisiyah
Jurnal Fisika dan Aplikasinya Vol 19, No 1 (2023)
Publisher : Lembaga Penelitian dan Pengabdian Kepada Masyarakat, LPPM-ITS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j24604682.v19i1.14432

Abstract

Research has been conducted on the characterization of coughing sounds based on the measured sound pressure level of the Arduino-based MAX9814 sound sensor to determine the characteristics of coughing sounds based on the Sound Pressure Level (SPL). This research method is carried out by designing sound sensor hardware and software using the MAX9814 sound sensor. After that, recording the coughing sound data from the cough voice coswara respondent data set using a sound sensor and converting it to SPL data. After that, the cough SPL data was analyzed from the SPL cycle graph during recording and the cough phase pattern. And the resulting characterization of coughing sound based on coughing pressure using an Arduino-based MAX9814 sound sensor produced a coughing sound character in terms of sound pressure level (SPL) based on the expulsive phase and the intermediate phase of coughing. The expulsive phase indicator is emphasized the intensity of occurrence and density in one cycle of recording coughing sounds. And for the intermediate phase based on the drop rate of the SPL back to the SPL position without coughing. The SPL of cough detected by the MAX9814 sound sensor is ±80dB.  
PELATIHAN EVALUASI AKUSTIK RUANG DI MASJID KI BAGUS HADIKUSUMO UNIVERSITAS MUHAMMADIYAH LAMONGAN Tatag Satria Praja; Muhamad Azwar Annas; Aris Widodo
Martabe : Jurnal Pengabdian Kepada Masyarakat Vol 6, No 6 (2023): martabe : jurnal pengabdian kepada masyarakat
Publisher : Universitas Muhammadiyah Tapanuli Selatan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31604/jpm.v6i6.2107-2116

Abstract

Rancang bangun masjid di Indonesia menyesuaikan budaya masing-masing daerahnya. Namun, dibalik keindahan interior maupun eksterior masjid tersebut kurang menghiraukan aspek akustik ruangannya. Hal ini mengakibatkan munculnya permasalahan akustik seperti waktu dengung yang tinggi dan kurang meratanya distribusi SPL. Pemuda masjid yang biasa membantu pengurusan masjid berupa menyiapkan fasilitas ibadah, menjadi muazin, menggantikan imam saat tidak hadir, mengadakan kegiatan keagamaan di masjid dan lain sebagainya. Peran pemuda masjid yang vital ini bisa menjadi kader akustik masjid di daerah masing-masing. Hal ini menjadikan inisiasi Takmir Masjid KBH untuk memperbaiki kondisi masjid dan sekaligus membimbing pada pemuda masjid agar lebih peka terhadap permasalahan sarana dan prasarana ibadah di masjid, utamanya terkait tata suara atau akustik masjid. Metode yang digunakan pada pelatihan ini adalah, ceramah, diskusi, demo alat dan praktek langsung. Analisis pengamatan dan evaluasi tingkat pemahaman peserta menggunakan kuesioner pretest dan posttest. Hasil dari kedua tes tersebut didapatkan peningkatakan nilai rata-rata dari yang awalnya 48% menjadi 75%. Sehingga kenaikan pemahaman rata-rata peserta adalah 27%. Simpulan dari kegiatan pelatihan ini adalah Adanya peningkatkan pemahaman peserta tentang akustik ruang masjid dibuktikan dari hasil kedua tes.
Analisis Kebutuhan Bahan Ajar Matematika untuk Menstimulus Kemampuan Literasi dan Numerasi di Tingkat Sekolah Dasar Ningrum, Izza Eka; Widodo, Aris; Fonda, Aulia
AS-SABIQUN Vol 7 No 1 (2025): JANUARI
Publisher : Pendidikan Islam Anak Usia Dini STIT Palapa Nusantara

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36088/assabiqun.v7i1.5571

Abstract

Students' requirements are not as well met by the teaching resources that are currently on the market. The majority of instructional materials tend to emphasize memorization of abstract ideas without giving detailed context. As a result, students show little interest in and comprehension of the subject matter being taught. PISA and AKM show low numeracy literacy skills in students. This study examines Babat's SD Muhammadiyah 2's math teaching resource needs for numeracy literacy. This study uses quantitative descriptive methods. The study found that current teaching materials are not improving students' numeracy literacy skills. Up to 8% of students are very low, 42% are low, 26% are medium, 21% are high, and 3% are very high. Students like using colorful instructional materials and find LKPD fun for arithmetic.
Characterization of the cough monitoring device for TB patients based on the MAX9814 sound sensor Musfiana, Masria; Widodo, Aris; Annas, Muhamad Azwar
Gravity : Jurnal Ilmiah Penelitian dan Pembelajaran Fisika Vol 10, No 2 (2024)
Publisher : Universitas Sultan Ageng Tirtayasa

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30870/gravity.v10i2.28340

Abstract

Mycobacterium tuberculosis is the cause of tuberculosis (TBC), one of the deadliest diseases in the world that affects the respiratory system. One of the nations having the highest number of tuberculosis cases worldwide is Indonesia. Health professionals must improve patient monitoring as one way to address this issue. This work aims to compile and describe monitoring instruments. The monitoring sensor is intended to help medical professionals treat patients and raise the quality of life for TB patients. Using advancements in technology, specifically the Internet of Things (IoT) to remotely operate electronic equipment, the Arduino Cloud Web serves as a platform for transmitting and storing patient cough data, enabling medical professionals to Recognize the intensity of the cough at any moment and act accordingly. Data on the sensor's accuracy and error values, sensitivity, repeatability, precision, and resolution are gathered as part of this monitoring sensor characterisation process. The instrument was calibrated using an Audiosensor with a 1000Hz audio generator and an SLM (Sound Level Meter) calibrator prior to data collection. The investigation yielded excellent results, with an accuracy rating of 96,14% and an error of 3,86%. This figure is reasonably close to the estimated value of 5% that has been calculated for the Gaussian distribution. The SLM with a sensor has an average value of 0.05, whereas the audiotool has a sensor value of 0.02. 50% is the repeatability value, 0.01% is the precision value, and 0.0125 is the sensor resolution.
Co-Authors Agus Rubiyanto Annas, Muhamad Azwar Endarko Endarko Fonda, Aulia Muhamad Azwar Annas Muktamar Cholifah Aisiyah Musfiana, Masria Ningrum, Izza Eka Tatag Satria Praja