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All Journal IPTEK The Journal of Engineering JFA (Jurnal Fisika dan Aplikasinya) Martabe : Jurnal Pengabdian Kepada Masyarakat Tsaqofah: Jurnal Penelitian Guru Indonesia YASIN: Jurnal Pendidikan dan Sosial Budaya MASALIQ: Jurnal Pendidikan dan Sains

Aris Widodo

Universitas Muhammadiyah Lamongan

Author-ID : 5405065

Religion Agriculture, Biological Sciences & Forestry Arts Humanities Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Education Electrical & Electronics Engineering Engineering Mechanical Engineering Physics Social Sciences Other

Published : 7 Documents Claim Missing Document

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Articles

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

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.

Studi Eksperimen Bandul dalam Menentukan Percepatan Gravitasi Bumi dan Memahami Konsep Gerak Harmonik Sederhana Muktamar Cholifah Aisiyah; Muhamad Azwar Annas; Izza Eka Ningrum; Aris Widodo; Hana Dwi Cahyani
TSAQOFAH Vol 2 No 3 (2022): MEI
Publisher : Lembaga Yasin AlSys

This research is a pendulum experimental study in determining the acceleration of Earth's gravity and understanding the concept of simple harmonic motion. This research was conducted at the Physics Laboratory of the University of Muhammadiyah Lamongan. This study aims to examine the benefits of conducting pendulum experiments with the simple pendulum swing method and in determining the acceleration of Earth's gravity, the period of oscillation and concepts in simple harmonic motion with variations in the mass of the pendulum, namely 150 grams, 75 grams and 35 grams. The results of the analysis of this study obtained the acceleration of Earth's gravity 9.79 m/s where the mass and length of the pendulum do not affect the value of gravity. While in simple harmonic motion in the form of pendulum oscillation is influenced by the length of the string. The pendulum oscillation will experience energy dissipation in maintaining its equilibrium position due to the gravity of the earth.

Analisis Percobaan Superposisi Gelombang Suara Menggunakan Software Audacity Aris Widodo; Muktamar Cholifah Aisiyah; Izza Eka Ningrum; Muhamad Azwar Annas; Masria Musfiana
YASIN Vol 2 No 4 (2022): AGUSTUS
Publisher : Lembaga Yasin AlSys

Superposition of waves experiment in physics subject need more innovation to dig up student knowledge about the essential of waves in physics. Such innovation is using Audacity software for analyze it. The purpose of this study is to analyze the superposition of sound waves using Audacity software in the wave superposition experiment. The method used is to prepare tools and materials, namely PC/laptop, 250 Hz, 1 kHz audio files and Audacity Software. Then, 250 Hz and 1 kHz audio is sampled in one wave using Audacity after which each audio sample is imported twice and then combined with Audacity software and saved. This is done for different audio frequencies as well. Then, the results of the merger are opened with Audacity and then analyzed and compared with the initial wave. And the resulting superposition of two 250 Hz waves produces an amplitude of twice and 250 Hz and 1 KHz is produced over a 4 ms wave period and the constructive and destructive wave amplitudes depend on the phase of the two waves. Thus, wave superposition experiments using Audacity software facilitate the analysis of superposition results and characterize the period and amplitude properties of waves.

Karakterisasi Sensor Cahaya Light Dependent Resistor (LDR) Muhamad Azwar Annas; Aris Widodo; Muktamar Cholifah Aisiyah; Izza Eka Ningrum; Dini Makrufah
MASALIQ Vol 2 No 4 (2022): JULI
Publisher : Lembaga Yasin AlSys

Research on the Characterization of the Light Dependent Resistor (LDR) Light Sensor has been carried out with the aim of understanding the characteristics of the LDR light sensor, for processing changes in the LDR resistance value as a measurement of light intensity and for accessing an 8-bit resolution ADC by entering the LDR light sensor voltage result. The value of the resistance on the LDR depends on the size of the light received by the LDR itself. In addition, the greater the intensity of light hitting the LDR surface, the smaller the resistivity. On the other hand, the smaller the intensity of light hitting the LDR, the greater the resistance value. The basic principle used in the use of LDR resistors as components of this sensor is the change in the resistance value and the amount of current flowing in the circuit. In this experiment, the distance variations of 0cm, 3cm, 6cm, 9cm, 12cm, 15cm, 18cm, 21cm, 24cm, 27cm and 30cm were used. LDR characteristics are slow response in identifying light intensity, the greater the light intensity the smaller the resistivity, LDR can be used to read changes in light intensity and data retrieval can be done with an op-amp and a microcontroller.

Pola Radiasi Antena Patch dalam Skala Linier Muhamad Azwar Annas; Aris Widodo; Uswatun Chasanah; Muktamar Cholifah Aisiyah; Izza Eka Ningrum
YASIN Vol 2 No 5 (2022): OKTOBER
Publisher : Lembaga Yasin AlSys

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58578/yasin.v2i5.895

An antenna radiation pattern experiment has been carried out with the aim of determining the patch antenna radiation pattern on a logarithmic and linear scale, understanding the properties and principles of the antenna, and understanding the types of antenna radiation patterns. In the experiment, the angle, frequency, and radian intensity data were obtained, and the value of the linear intensity was calculated. With the principle of converting electrical signals into electromagnetic signals. a graph between angle and intensity is obtained. the graph between radian intensity and angle forms a circular pattern, in which the value of intensity and frequency at each point with a difference of 5 degrees has almost the same value. In conclusion, the antenna is a structure that can receive and release electromagnetic waves in the air. The patch antenna used has a unidirectional radiation pattern. Converts electromagnetic signals into electrical signals and vice versa, has a certain radiation pattern, and is easily disturbed by metallic materials.

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

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

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.

Co-Authors Agus Rubiyanto Dini Makrufah Endarko Endarko Hana Dwi Cahyani Izza Eka Ningrum Masria Musfiana Muhamad Azwar Annas Muktamar Cholifah Aisiyah Tatag Satria Praja Uswatun Chasanah

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