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All Journal Indonesian Journal of Electronics and Instrumentation Systems International Journal of Science and Engineering (IJSE) BERKALA FISIKA Jurnal Ilmiah Aplikasi Isotop Radiasi YOUNGSTER PHYSICS JOURNAL Bulletin of Chemical Reaction Engineering & Catalysis Jurnal Ilmiah Arena Tekstil Jurnal Teknik Pertanian Lampung (Journal of Agricultural Engineering) Journal of Physics and Its Applications Jurnal ULTIMA Computing Indonesian Journal of Electrical Engineering and Computer Science Journal of Energy, Material, and Instrumentation Technology
Zaenul Muhlisin
BDepartment Of Physics, Faculty Of Sciences And Mathematics, Diponegoro University, Semarang
Agriculture, Biological Sciences & Forestry Astronomy Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Earth & Planetary Sciences Electrical & Electronics Engineering Energy Engineering Immunology & microbiology Industrial & Manufacturing Engineering Materials Science & Nanotechnology Physics

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Improving water absorption time and the natural silk strength (Bombyx Mori) using atmospheric dielectric barrier discharge plasma Zaenul Muhlisin; Muhammad Adrian Lathif; Fajar Arianto; Pandji Triadyaksa
Journal of Physics and Its Applications Vol 3, No 2 (2021): May 2021
Publisher : Diponegoro University Semarang Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/jpa.v3i2.10658

Abstract

This researchaimed to obtain Dielectric Barrier Discharge plasma discharge characteristics with and without the placement of natural silkBombyx Mori on one of the electrodes. Furthermore, the strength and the water absorption time of the irradiated silk samples will be analyzed.  Plasma discharge is generated by connecting electrodes of point-to-plane configuration with a sheet of glass inserted on the plane electrode at atmospheric conditions. The characterization of plasma discharge, either with or without the natural silk samples' placement on the plane electrode, was performed by increasing A.C.'s high voltage power source to reach arch discharge. Theelectrode spacing varied from 0.7 cm to 2.5 cm with a 0.3 cm increment. Sample irradiation was performed using cold plasma for 5, 15, and 30 minutes respectively. Placing or not placing the natural silk samples on the plane electrode will increase the plasma's discharge current and increase the high voltage. Moreover, increasing the distance between the electrodes and placing the sample on the plane electrode decreases the discharge current. Using Scanning Electron Microscopy, it was found that increasing plasma irradiation time on samples decreases the silk thread'sdiameterand shortening its water absorption time. The strength of irradiated fabric was reduceduntil 15 minutes of irradiation. However, at 30 minutes of irradiation, there was an increase in sample thickness compared to control samples.
Perancangan Alat Karakterisasi Dioda dengan ESP32 dan Rangkaian Op-Amp LM358 Berbasis Android Ari Bawono Putranto; Zaenul Muhlisin; Amatul Lutfiah; Fakhruddin Mangkusasmito; Megarini Hersaputri
Ultima Computing : Jurnal Sistem Komputer Vol 13 No 1 (2021): Ultima Computing : Jurnal Sistem Komputer
Publisher : Faculty of Engineering and Informatics, Universitas Multimedia Nusantara

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31937/sk.v13i1.2088

Abstract

This research has succeeded in making a diode forward bias characterization test device using the ADC and the internal DAC of the ESP32 microcontroller. The output voltage of the DAC is added by 2 times the LM358 non-reversing op-amp amplifier circuit. So that the test results of the DAC output voltage can reach a maximum value of 6.3 volts as a source of variable DC power supply for the diode forward bias characteristic test circuit. Diode forward bias characterization testing is carried out through the interface of an Android smartphone with a WiFi network and a forward bias characterization curve is obtained which has a value and shape almost the same as the manual test. Testing the diode forward bias characterization using this application is faster than using manual measurements with a multimeter measuring instrument. Based on tests carried out using the Android smartphone application for 3 times, it was obtained an average time of 30 seconds, while manually using a measuring instrument obtained an average time of 657.7 seconds.
ANALISIS FENOMENA ELEKTROHIDRODINAMIK MENGGUNAKAN PLASMA LUCUTAN KORONA DC POSITIF DENGAN KONFIGURASI ELEKTRODA MATA PAHAT DAN TITIK TENGAH-BIDANG PADA MINYAK KELAPA SAWIT Charis Munajib; Asep Yoyo Wardaya; Zaenul Muhlisin; Isnain Gunadi
BERKALA FISIKA Vol 25, No 4 (2022): Berkala Fisika
Publisher : BERKALA FISIKA

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

Abstract

Research  has  been  carried  out  on  the  analysis  of  I-V  characteristic  curves  and electrohydrodynamic phenomena using palm oil with a positive DC corona discharge generator with Chisel Eye and Mid-Field electrode configurations. This study aimed to obtain the effect of several  variations  used  on  the  characteristic  curve  and  distribution  of  ion  winds  on electrohydrodynamic phenomena. This research was conducted with 6 variations of the size of the dimensions of active electrodes and variations in the distance between the electrodes (c) 0.5 cm, 1 cm, 1.5 cm, and 2 cm. In the study of the I-V characteristic curve, the results show that with the increase in the applied voltage, the stronger the current produced will increase. At electrode D and a distance of 0.5 cm, the circuit is given a voltage of 5.32 kV produces a current of 10.5 A, whereas if the circuit is given a voltage of 6.34 kV it produces a current of 27.5 A. In the study of the analysis of electrohydrodynamic phenomena, it was found that if the variation used changed it would affect the diameter of the deformation of the palm oil in the form of a circle. At electrode D, at a distance of 0.5 cm with a voltage of 7.14 kV it produces a circular oil deformation diameter of  2.7  cm,  while  at  a  distance  of  1  cm  with  a  voltage  of  11.23  kV  produces  a  circular  oil deformation diameter of 5.5 cm.
An improvement of the computational effective diameter measurement in thoracic computed tomography examinations Choirul Anam; Riska Amilia; Wahyu S. Budi; Heri Sutanto; Zaenul Muhlisin; Ariij Naufal; Geoff Dougherty
Indonesian Journal of Electrical Engineering and Computer Science Vol 31, No 1: July 2023
Publisher : Institute of Advanced Engineering and Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.11591/ijeecs.v31.i1.pp189-196

Abstract

A method to calculate a corrected effective diameter (DMIL) to more accurately estimate the dose received by a patient in chest computed tomography (CT) examination had been previously proposed. However, the discrepancy between DMIL and water-equivalent diameter (Dw) is still relatively high (i.e. about 6%). Furthermore, the method is still performed manually, so it is laborious and time-consuming. This study aims to improve the corrected effective diameter with bone correction (Deffcorr) and to automatically calculate it. The automated Deffcorr was calculated as the square root of the product of these corrected AP and LAT diameters. The approach was implemented on 30 patients who had undergone chest CT examination with the standard protocol. The results show that the correlation between the Deffcorr and Dw is R2=0.93 with no statistical difference (p>0.05). The automated Deffcorr is 3.1% lower than Dw. While the DMIL is 10.5% higher than Dw and both are statistically different (p<0.05). In conclusion, the new Deffcorr was introduced and the result obtained was closer to Dw than DMIL. This method is simple enough to be used as an alternative method to accurately estimate Dw for radiation dose estimation in clinical chest CT scanning.
Effect of Corona Plasma Radiation on the Contact Angle and Wettability of Bamboo Surface Alfajrin, Achmad Chalid Afif; Muhlisin, Zaenul; Komariah, Rahma Nur; Putra, Bintang Ridzky Ranindra; Nazuwatussya'diyah, Nazuwatussya'diyah; Arzi, Yudha Hamdi; Mardhiyatna, Mardhiyatna; Sari, Rizki Yustisia
Journal of Energy, Material, and Instrumentation Technology Vol 6 No 2 (2025): Journal of Energy, Material, and Instrumentation Technology
Publisher : Departement of Physics, Faculty of Mathematics and Natural Sciences, University of Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jemit.v6i2.294

Abstract

Bamboo is a widely utilized non-timber forest product, often innovated into laminated boards, particle boards, and plywood. The outer bamboo surface (skin) possesses high compressive strength but exhibits hydrophobic properties, limiting its wettability toward liquids. Plasma corona technology, operating at atmospheric pressure and using surrounding gases at a relatively low cost, offers a promising solution to modify bamboo surfaces by increasing their surface energy. This study aimed to analyze the hydrophilic resistance and wettability of bamboo surfaces treated with plasma corona, measured through contact angle analysis. The direct drop method was employed by dripping water and phenol formaldehyde (PF) fluids onto bamboo surfaces treated with plasma corona. Contact angle measurements were performed using ImageJ drop analysis software. Results demonstrated that plasma corona treatment significantly reduced contact angle values, improving surface wettability. Untreated bamboo surfaces showed contact angles of 72.7° for water and 111.5° for PF fluids, indicating limited wettability. Post-treatment, the contact angles decreased to less than 30° for water and below 90° for PF, signifying enhanced wettability. However, the hydrophilic properties were found to be non-permanent, with contact angle values gradually increasing over 13 days of observation. Among the tested parameters, plasma corona treatment with a current strength of 75 mA for 5 minutes provided the most optimal wettability improvement for water and PF fluids. This study highlights the effectiveness of plasma corona in enhancing bamboo surface wettability, making it more suitable for applications requiring adhesive bonding or fluid spreading in industrial processes.
Analytical Solution in the (I-V) Characteristic Curves Calculation of the Corona Plasma Discharge Using the Capacitance Model Wardaya, Asep Yoyo; Muhlisin, Zaenul; Suseno, Jatmiko Endro; Setiawati, Evi; Hadi, Susilo; Windarta, Jaka
Journal of Physics and Its Applications Vol 7, No 3 (2025): August 2025
Publisher : Diponegoro University Semarang Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/jpa.v7i3.25270

Abstract

This research aims to calculate thoroughness among data points and analytical simulation curves in discussing corona discharges' (I-V) characteristics. The electrode construction used is the twin towers with dividing angles to the plane (TTDA-P) model in air, with negative DC polarity. An asymmetrical electrical CCP model in the electrode design uses research variations, including active electrode center clamp angles of q = 300, 450, and 600 and active and passive electrode distances (d) of 0.002 m, 0.005 m, and 0.008 m. The simulation curve comes from the analytical formulation of the reduced capacitance type (inserting a multiplying factor k to the sharp corners of the active electrode), with the simulation program being a Python GUI program. The experimental results produced an appropriate error value (t-test value £0.05) and a high percentage of tangent points value. The best curve was achieved at q = 450 and d = 0.008 m, with a t-test value of 0.0313 and the highest percentage of significant tangent points of 92.31%. For all variations q, there is a tendency that the smaller the value of d (the gap length among two electrodes), the greater the deviation distance between the simulation curve and the data points.
Sistem Kendali Level Air Separator pada Produksi Uap di Kilang Minyak Menggunakan Kontrol PID Suseno, Jatmiko Endro; Hadi, Muhammad Rafli Irsyad; Setyawan, Agus; Muhlisin, Zaenul; Sugito, Heri
IJEIS (Indonesian Journal of Electronics and Instrumentation Systems) Vol 14, No 2 (2024): October
Publisher : IndoCEISS in colaboration with Universitas Gadjah Mada, Indonesia.

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/ijeis.100662

Abstract

Minyak bumi pada proses distilasi dipisahkan sesuai fraksi menurut titik didihnya, dengan adanya kondisi vakum maka akan menghasilkan parameter fisis yang dituju, sehingga memenuhi parameter produk yang diinginkan. Sistem produksi uap merupakan pengendalian cascade atau bertingkat, terdapat dua paramater pengendalian yang dikendalikan yaitu flow dan level. Analisa kinerja sistem produksi uap dengan prinsip two phase separator ini dilakukan dengan membuat model matematis sehingga mendekati keadaan aslinya menggunakan separator geometry dan perangkat lunak Matlab R2018b, maka diperlukan pengendali untuk menganalisanya, metode pengendali yang digunakan adalah metode Ziegler-Nichols Critical Gain dan Critical Period. dan tuning untuk menentukan gain parameter pengendalinya (Kp, Ki, Kd). Berdasarkan hasil pengujian, tipe pengendali dengan hasil terbaik adalah pengendali PID untuk pengendali flow dengan parameter Kp = 0.12, Ti = 0.28, Td = 0.4, dengan performansi Rise Time = 1.97, Settling Time = 7.17, Overshoot (%) = 9.01, dan Hasil terbaik untuk pengendali level adalah pengendali P dengan parameter Kp = 0.06, dengan performansi Rise Time = 3.16, Settling Time = 7.71, Overshoot (%) = 2.45.
Effect of Corona Discharge Plasma Radiation on the Viability of True Shallot Seeds (Allium cepa L. var. aggregatum) Firmansyah, Imam; Prihastanti, Erma; Suedy, Sri Widodo Agung; Muhlisin, Zaenul; Surahman, Arif
Jurnal Teknik Pertanian Lampung (Journal of Agricultural Engineering) Vol. 13 No. 2 (2024): June 2024
Publisher : The University of Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jtep-l.v13i2.485-492

Abstract

TSS (True Shallot Seed) need to be developed to address the quality and quality of shallot seeds. The seeds, however, still has constraints on its viability and germination. The objective of this study was to investigate the effect of corona discharge plasma radiation on the viability of true shallot seeds. The research was conducted in March - April 2023 at the Plasma Laboratory, Faculty of Science and Mathematics, Diponegoro University, and the germination test experiments at the the Agricultural Technology Research and Assessment Installation (IP2TP Ungaran). The experiment was designed completely randomized with 6 treatments of radiation time consisting of P0 (without radiation), P1 (5 min), P2 (10 min), P3 (15 min), P4 (20 min), and P5 (25 min). All treatments were carried out with 5 replications. The collected data were processed using ANOVA and then continued with the DMRT test. The results showed that the corona plasma radiation treatment for 15-25 min affected the parameters of germination, germination rate, seed growth rate, vigor index, seed uniformity, and sprout length.  Keywords: Plasm, Radiation, Shallots, TSS.
Co-Authors Achmad Sjaifudin Tayibnapis Ade Ika Susan Adhi Prasetyo Agus Setyawan Ahmad Sudin Ahmas Sudin, Ahmas Alfajrin, Achmad Chalid Afif Ali Khumaeni Amatul Lutfiah Andi Wibowo Kinandana Andi Wibowo Kinandana Anna Adianti Anwar Usman Ardhianto, Khamdi Bagas Ari Bawono Putranto Ariij Naufal Arzi, Yudha Hamdi Asep Yoyo Wardaya Azzuma Hasna Azzulkha Baital, Muhammad Sawal Bawono, Ari Binu Soesanto, Qidir Maulana Charis Munajib Choirul Anam AM Diponegoro Darliawati, Herli Dhyan Prastiwi Dhyan Prastiwi Dhyan Prastiwi Erma Prihastanti Evi Setiawati F Arianto Fajar Arianto Fajar Ariyanto Fakhruddin Mangkusasmito Filemon Jalu N Putra Geoff Dougherty Gunawan Gunawan Hadi, Muhammad Rafli Irsyad Hasan, Siti Nurjannah Hendri Widiyandari Hendri Widyandari Heri Sugito Heri Sutanto Heri Sutanto Herli Darliawati Iis Nurhasanah Imam Firmansyah Isnain Gunadi Jatmiko Endro Suseno Ketut Sofjan Firdausi, Ketut Sofjan Komariah, Rahma Nur Kusworo Adi Mahendra Kusuma Nugraha Mardhiyatna, Mardhiyatna Megarini Hersaputri Muhammad Adrian Lathif Muhammad Nur Muhammad Nur Muhammad Nur Muhammad Nur Muhammad Nur Muhammad Nur Muhammad Nur Muhammad Nur Mursiyatun Mursiyatun Nazuwatussya'diyah, Nazuwatussya'diyah Nouval Khamdani Nur, Muhammad Nuraini, Desy Pandji Triadyaksa Prastiwi, Dhyan Pratama Jujur Wibawa Priyono Priyono Putra, Bintang Ridzky Ranindra Rin Hafsahtul Asiah Riska Amilia Rizky Maylia Rofiqotul Khasanah S Juliawan S. Suryono Sapto P Putro Sapto P. Putro Sari, Rizki Yustisia Sholehah Aisyah Sri Widodo Agung Suedy Sulistia Nurdianik Sumariyah Sumariyah Surahman, Arif Susilo Hadi Susilo Hadi, Susilo Syamsul Arifin Tayibnapis, Achmad Sjaifudin Ukhti Nurohma Rizki Wahyu S. Budi Wienda Intan Permatasari Windarta, Jaka Wulandary Oktiyana Yudi Pratama Yusup Hidayat