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All Journal Jurnal Sains dan Seni ITS JFA (Jurnal Fisika dan Aplikasinya) UNEJ e-Proceeding Jurnal Pengabdian Kepada Masyarakat (Mediteg) Jurnal Pengabdian Ilung (Inovasi Lahan Basah Unggul) Sewagati Jurnal Sains Materi Indonesia
Fatimah, Iim
Departemen Fisika Institut Teknologi Sepuluh Nopember
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Journal : JFA (Jurnal Fisika dan Aplikasinya)

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The Influence of Humidity-Control Addition on Electrospinning System for Nanofiber Formation Diky Anggoro; M Rizki Romadhoni; Imam Muhlas; Iim Fatimah
Jurnal Fisika dan Aplikasinya Vol 18, No 1 (2022)
Publisher : Lembaga Penelitian dan Pengabdian Kepada Masyarakat, LPPM-ITS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j24604682.v18i1.11659

Abstract

This research was conducted to determine the effect of humidity control system and collector rotational speed on electrospinning during PVA nanofiber fabrication. The humidity control system is controlled by Arduino Uno and the actuator is an air pump, and modifications are made to the air pump by adding silica gel as a more optimal humidity reducing agent. A 12 V DC-motor and L293D driver are used to control the direction and speed of rotation of the collector. The collector speed control uses the principle of Pulse Width Modulation (PWM). The humidity control system that has been made has an accuracy rate of more than 88%, and the lowest relative humidity achieved is 30%. The collector control system that has been made has an accuracy rate of more than 95%, and the lowest rotational speed is 125 RPM. Carbon nanofiber was successfully fabricated with an average diameter distribution of 43.4 nm and 79.2 nm at 30% and 40% humidity, respectively.
Blood Pressure Monitor Design Using MPX5050GP Pressure Sensor and Visual C# 2010 Express Ayu Jati Puspitasari; Endarko Endarko; Iim Fatimah
Jurnal Fisika dan Aplikasinya Vol 15, No 3 (2019)
Publisher : Lembaga Penelitian dan Pengabdian Kepada Masyarakat, LPPM-ITS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j24604682.v15i3.4929

Abstract

Blood pressure monitor (BPM) using oscillometric method with MPX5050GP pressure sensor has been successfully fabricated and calibrated. Oscillometric method is measurement method to observe cuff pressure oscillations. In this study, the oscillometric waveform measured by fabricated BPM used Arduino Uno which processes pulse rate, systolic and diastolic pressures. Measurement results of pulse rate, systolic and diastolic pressures will be displayed and recorded in application designed using Visual C# 2010 Express. Fabricated BPM capable of measuring pulse rate and blood pressure in the range of 40-260 mmHg with ratio of systolic and diastolic pressures were achieved 0.48 and 0.78, respectively. The system has an average error of systolic pressure, diastolic pressure, and pulse rate were -4.38 mmHg (2.72%), 0.10 mmHg (5,55%), and 4.48 bpm (6.07%).
Performance Analysis of Cone Basin-Based Gravitational Water Vortex Power Plant (GWVPP) by Variations in the Number of Blades Iim Fatimah; Haswin Dian Fathoni; Bachtera Indarto
Jurnal Fisika dan Aplikasinya Vol 18, No 3 (2022)
Publisher : Lembaga Penelitian dan Pengabdian Kepada Masyarakat, LPPM-ITS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j24604682.v18i3.14496

Abstract

The electricity supply is not evenly distributed for all regions in Indonesia. This is due to the lack of transportation access to reach these areas because of difficult terrain conditions. One of abundant energy sources available in nature is water, which can be used for micro-level power generation. Micro hydro generator usually uses a waterfall with a high head. However, not all of the water flow has a head tall. Therefore, this study proposes a promising prototype of a cone basin-based Gravitational Water Vortex Power Plant (GWVPP). The purpose of this study is to determine the performance of the cone basin-based GWVPP prototype by variation in the number of blades. The vortex turbine is designed with a water flow rate of 169.63 liters/minute and a cone basin with square-shaped blades and variations in the number of blades, namely 2, 4, and 6, with the same turbine blade area of 0.01 m2 . It was found that an increase in the number of blades enhances mechanical characteristics of, e.g. torque and rotational speed, as well as electrical characteristics, e.g. voltage, current, and electric power. The maximum result is achieved when the number of blades is six with the rated power of 5 mW and the rotation speed of 119.351 rpm.
Co-Authors Agnes Tuti Rumiati Aristu Prananca Athorn Vora-Ud Ayu Jati Puspitasari Bachtera Indarto, Bachtera Bintoro Anang Subagyo Diani Ainun Nisa Diky Anggoro Endarko Endarko Faridawati Faridawati Gatut Yudoyono Gontjang Prajitno Haswin Dian Fathoni Imam Muhlas Janti Gunawan Lila Yuwana Linda Silvia, Linda Lucky Putri Rahayu M Rizki Romadhoni Melania Muntini Melania Suweni Muntini Mohammad Haekal Muhammad Rizky Mujtahidatul Alawiyyah Muthmainnah, Melania Suweni Muntini Nurrisma Puspitasari Rachmad Sudibyo Danu Saputro Retno Asih Somporn Thaowankeaw Sudarsono Sudarsono Sudarsono Sudarsono Sudarsono Sudarsono Susilo Indrawati Suyatno Suyatno Suyatno Suyatno Suyatno Tosawat Seetawan Yanurita Dwi Hapsari Yono Hadi Pramono