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All Journal JURNAL ILMIAH PENDIDIKAN FISIKA AL BIRUNI Edufisika: Jurnal Pendidikan Fisika Science and Technology Indonesia Jurnal Ilmu Fisika Journal of Advanced in Information and Industrial Technology (JAIIT) Jurnal Inkofar Sainteks: Jurnal Sain dan Teknik JIPFRI (Jurnal Inovasi Pendidikan Fisika dan Riset Ilmiah) Dinamika Kerajinan dan Batik: Majalah Ilmiah
Putra, Valentinus Galih Vidia
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Arts Astronomy Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Earth & Planetary Sciences Education Electrical & Electronics Engineering Energy Engineering Environmental Science Industrial & Manufacturing Engineering Materials Science & Nanotechnology Medicine & Pharmacology Physics Public Health Social Sciences Transportation

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Penerapan Gelombang Plasma dalam Mengurangi Kadar Chemical Oxygen Demand (COD) pada Limbah Batik Melalui Corona Plasma dan Elektrokoagulasi dengan Metode Variasi Putra, Valentinus Galih Vidia; Mohamad, Juliany Ningsih; Yusuf, Yusril
Jurnal Ilmu Fisika Vol 12, No 2 (2020): Published in September 2020
Publisher : Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/jif.12.2.60-69.2020

Abstract

Proses pengolahan limbah tekstil umumnya dapat berupa limbah dari proses penghilangan kanji (Desizing), penggelantangan (Scouring), pemutihan (Bleaching), dan pencelupan kain (Dyeing) serta proses pewarnaan dan pembilasan yang menghasilkan air limbah berwarna dengan COD yang tinggi. Dikarenakan kompleksitas jenis limbah tekstil, maka pemilihan metode pengolahan limbah merupakan suatu tantangan tersendiri dalam penelitian oleh beberapa peneliti. Artikel ini memperlihatkan beberapa metode pengolahan limbah dengan menggunakan metode elektrokoagulan (EC), metode plasma dan gabungan metode plasma dan elektrokoagulan. Hasil riset memperlihatkan bahwa pengabungan metode plasma dan elektrokoagulan akan lebih baik dalam penguraian air limbah dengan indikator menurunnya COD pada limbah (sebesar 240mgO2/L hingga 250 mgO2/L). Efisiensi pada metode plasma-elektrokoagulasi sebesar 42,5% - 44,8%.
Nickel Salt Dependency as Catalyst in the Plating Bath on the Film Properties of Cu/Cu-Ni Rosyidan, Cahaya; Kurniawan, Budhy; Soegijono, Bambang; Maulani, Mustamina; Samura, Lisa; Nababan, Frederik Gresia; Putra, Valentinus Galih Vidia; Susetyo, Ferry Budhi
Science and Technology Indonesia Vol. 9 No. 3 (2024): July
Publisher : Research Center of Inorganic Materials and Coordination Complexes, FMIPA Universitas Sriwijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26554/sti.2024.9.3.529-538

Abstract

Metal plating frequently employs nickel (Ni) and copper (Cu) as anodes. Cu/ Cu-Ni film formed has many advantages, such as better corrosion resistance and high hardness characteristics. This study aims to assess the properties of Cu/Cu-Ni film, such as phase, surface morphology, crystallographic orientation, hardness, corrosion analysis, and contact angle, which were fabricated using electrodeposition with various Ni salt additions (0.3, 0.5 and 0.7 M). In addition, the cathode current efficiency (CCE) and deposition rate of the Cu/Cu-Ni electrodeposition were also investigated. An increase in Ni salt in the plating bath could enhance the pH, promoting higher CCE and depleting hydrogen evolution at the cathode, leading to the presenting Ni phase in the alloy. The higher concentration of Ni salt in the solution could also enhance the deposition rate due to a shift to a pH value, which affects the roughening of the surface morphology, promoting a higher contact angle. All crystal structures generated by Cu/Cu-Ni electrodeposition were FCC, with the preferred orientation of the (111) plane. Crystallite size and lattice strain depend on the deposition rate. Less crystallite size and lattice strain affect the film’s hardness and corrosion resistance. Moreover, the third bath had the resulting Cu-Ni layer with the best hardness and corrosion rate of around 136 HV and 0.081 mmpy.
Knitting Fabric with Fractal Geometry: Fractal Theory Applied to Industry 4.0 Munandar, Taufik; Ihsan Ardiansyah, Muhammad; putra, valentinus galih vidia
Sainteks: Jurnal Sain dan Teknik Vol 6 No 2 (2024): September
Publisher : Universitas Insan Cendekia Mandiri

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37577/sainteks.v6i02.772

Abstract

Knitted fabrics have complex and repetitive patterns, similar to fractal geometry, where fractal theory can be applied in industry 4.0 to optimize the design, production and analysis of complex and efficient textile structures.This study aims to reduce electromagnetic radiation using conductive knit fabrics patterned with fractal geometry and non-conductive knit fabrics with similar patterns. Tests included raw materials (yarn) and fabrics. The yarn was tested using FTIR and SEM, while the fabric was tested for anti-radiation reduction and aesthetics. Conductive yarns of stainless steel polyester filament were interlaced with acrylic yarn using the jacquard technique on a Stoll CMS 540 HP automatic flat knitting machine. The results showed that the conductive knit fabric patterned with fractal geometry was better at absorbing electromagnetic radiation than the non-conductive knit fabric. The radiation test was conducted with sources from smartphones and computer screens at a distance of 10 cm, 20 cm, and 30 cm, while the aesthetic test was conducted using a questionnaire. The novelty of this research lies in the application of fractal geometry motifs, which enhance the protective and aesthetic functions of the fabric, resulting in a functional textile with high visual appeal.
PREDIKSI END BREAKAGE BENANG KAPAS DI MESIN ROTOR SPINNING MENGGUNAKAN PENDEKATAN JARINGAN SARAF TIRUAN Iskandar, Syarif; Putra, Valentinus Galih Vidia; Hermansyah, Hermansyah
EduFisika: Jurnal Pendidikan Fisika Vol 7 No 1 (2022): Edufisika: Jurnal Pendidikan Fisika Volume 7 Nomor 01, Juni 2022
Publisher : Program Studi Pendidikan Fisika FKIP Universitas Jambi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.59052/edufisika.v7i1.19543

Abstract

The purpose of this study is to predict the total end breakage per machine in 40 hrs of cotton yarn in a rotor spinning machine based on yarn count (yarn count), rotor speed (rotor speed), opening roller speed (opening roller speed) and residual trash content in draw frame sliver. . This study uses an artificial neural network (ANN) method in predicting a desired output. Furthermore, the artificial neural network is modeled with several model variations. From several modeling and testing carried out, starting from varying the number of nodes, the amount of alpha, the number of hidden layers, the number of iterations, it can be obtained that the results of using an artificial neural network with 1 hidden layer, 3 nodes, alpha of 0.3 with 50,000 iterations have more optimal results compared to the others because the resulting output is close to the target with an R-squared value of 0.984968. This shows that there is a large or close correlation between the actual variables and the variables in the artificial neural network. The novelty of this study is the use of ANN for the first time in predicting the total end breakage per machine in 40 hrs of cotton yarn in a rotor spinning machine. This method can facilitate top management and especially the Quality Control section in making decisions to set the parameters of the rotor machine in order to minimize the occurrence of yarn end breakage per machine in 40 hrs.
Metode Pengukuran Kapasitansi Dengan Menggunakan Mikrokontroler Arduino Uno Putra, Valentinus Galih Vidia; Wijayono, Andrian; Purnomosari, Endah; Ngadiono, Ngadiono; Irwan, Irwan
JIPFRI (Jurnal Inovasi Pendidikan Fisika dan Riset Ilmiah) Vol. 3 No. 1 (2019): JIPFRI (Jurnal Inovasi Pendidikan Fisika dan Riset Ilmiah) - May 2019
Publisher : Universitas Nurul Huda

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30599/jipfri.v3i1.425

Abstract

RC circuit (Resistor-Capacitor) is an electric circuit that has a combination of resistor and capacitor components which are installed either series or parallel. This research was conducted to measure the capacitance of two capacitors with different capacitances with only using one resistor. This study aims to compare the capacitance both experimentally (using data acquisition systems) and theoretically. Capacitance measurements were carried out experimentally using Arduino Uno and at a maximum voltage of 5 volts. In this research, it has been successfully determined the charge capacitance of the capacitors, both in experiment and theory. It has been found the correlation of the results between experiment and theory (the value of R2 in charging and discharging process is greater than 0.95).
Pengembangan Alat Uji Efisiensi Lampu Berbasis Mikrokontroller Arduino Uno untuk Evaluasi Tingkat Pencahayaan Lampu Meja Belajar di Laboratorium Fisika-Mekatronika Politeknik STTT Bandung Putra, Valentinus Galih Vidia; Wijayono, Andrian; Ngadiyono, Ngadiyono; Purnomosari, Endah
JIPFRI (Jurnal Inovasi Pendidikan Fisika dan Riset Ilmiah) Vol. 4 No. 2 (2020): JIPFRI (Jurnal Inovasi Pendidikan Fisika dan Riset Ilmiah) - November 2020
Publisher : Universitas Nurul Huda

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30599/jipfri.v4i2.640

Abstract

In this research, a light efficiency test tool has been designed using an Arduino UNO microcontroller to provide an understanding of the use of the ohm law application in basic physics practicum. This lamp efficiency test prototype uses an LDR sensor device and a resistor connected to the Arduino microcontroller as a light intensity detector, while the variation of electrical power is used by an AC variac with the lamp distance to the sensor having a constant value. The experimental results showed that the efficiency of the lamp can be obtained through a gradient of the luminosity curve on electric power. The efficiency of the lamp is 16.935 lm/watt and the average resistance can be obtained on 983.01 which the intensity in lux is 337,05 lux on 157,68 Lm and the maximum intensity in lux can be obtained on 453,35 lux on 208,54 Lm.
Pengukuran Konstanta Dielektrik Udara Pada Perangkat Kapasitor Plat-Sejajar Berbasis Mikrokontroler Arduino Uno Wijayono, Andrian; Putra, Valentinus Galih Vidia
JIPFRI (Jurnal Inovasi Pendidikan Fisika dan Riset Ilmiah) Vol. 4 No. 1 (2020): JIPFRI (Jurnal Inovasi Pendidikan Fisika dan Riset Ilmiah) - May 2020
Publisher : Universitas Nurul Huda

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30599/jipfri.v4i1.651

Abstract

This study aims to design a prototype of an air dielectric constant measuring device and be able to measure the capacitance value using an Arduino microcontroller device. The measurement of the air dielectric constant is carried out by means of the principle of measuring the capacitance of a capacitor device with a plate-parallel configuration with the air dielectric material. Capacitance measurements are carried out with the principle of charging and emptying capacitors using an Arduino Uno microcontroller device. The charging and discharging process is carried out using a series of resistor-capacitor (RC) series with a source voltage of 5 volts from the microcontroller device. This experiment has used a parallel plate with a size of 29 × 30 cm as an electrode capacitor, and a resistor device with a size of 125 megaOhm. The results showed that the behavior of charging and discharging parallel plate capacitor devices has an R square value of> 0.9, which shows a fairly good correlation between the predicted and experimental results on capacitance measurements. The results showed that the prototype of a dielectric constant measuring device can be well designed by showing the capacitance value of the device at the state of filling and emptying and the measurement results show the value of the air dielectric constant has been measured with a value of 0.991 - 1.0346.
The Application of Non-Thermal Plasma and Electrocoagulation as Purifier of Liquid Waste in Home Industries Samura, Lisa; Maulani, Mustamina; Rosyidan, Cahaya; Putra, Valentinus Galih Vidia
JIPFRI (Jurnal Inovasi Pendidikan Fisika dan Riset Ilmiah) Vol. 6 No. 1 (2022): May Edition
Publisher : Universitas Nurul Huda

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30599/jipfri.v6i1.992

Abstract

This study aims to examine the decomposition method of liquid waste in the home industry, especially in the tofu industry, by using non-thermal plasma and electrocoagulant methods that are environmentally friendly and with low energy. In this study, the plasma method, electro-coagulant method, and a combination of both (electro-coagulant followed by plasma method and plasma followed by electro-coagulant method) were used to decompose liquid waste in the tofu industry. The results showed that non-thermal plasma followed by the electrocoagulation method was the most effective in reducing the T.D.S. value of 1983 ppm (the minimum value of the total control T.D.S. was around 2702 ppm), the minimum value of electrical conductivity (E.C.) was around 3967 (μs/cm), and also obtained a value of 3967 (μs/cm). pH 7.0. Based on the research results, non-thermal plasma combined with the electrocoagulant method can be applied to more optimally decompose liquid waste, especially in the tofu industry. The combination method of plasma and electrocoagulation to decompose the tofu industrial wastewater, which is environmentally friendly, is the novelty of this research
Developing heat rate and heat capacity measurement instruments of textile waste solution in the textile dyeing process Putra, Valentinus Galih Vidia; Purnomosari, Endah; Mohamad, Juliany Ningsih
Jurnal Ilmiah Pendidikan Fisika Al-Biruni Vol 9 No 2 (2020): Jurnal Ilmiah Pendidikan Fisika Al-Biruni
Publisher : Universitas Islam Negeri Raden Intan Lampung, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24042/jipfalbiruni.v9i2.5951

Abstract

Heat rate and heat capacity are widely used to determine the thermal characteristics, especially for wastewater treatment using electro coagulant. This study aimed to determine the value of heat rate and heat capacity of the waste solution in the textile industry, especially in the dyeing waste, by using a microcontroller device. The method for measuring the specific heat capacity and the textile waste solution's heat rate is based on the principle of the first law of Thermodynamics. Temperature measurements were carried out using a digital temperature sensor type DS18B20. In this research, the heat rate and specific heat of the dyeing solution and mineral water used in the textile industry have been studied. This study uses five types of dyeing waste solution as test solutions, namely green waste solution, orange waste solution, blue waste solution, brown waste solution, and mineral water. This experiment's principle is applying Joule's law by using electrical properties with a microcontroller device used to obtain the rise of temperature data each time in real-time every 2 seconds. Based on this research, it can be concluded that the instrument can be used to measure the heat rate and heat capacity of a textile waste solution. Based on this research, we also found that the specific heat of hard water (Hard water is a kind of water with high mineral content, while soft water is water with low mineral content. Apart from calcium and magnesium ions, the cause of hardness can also be other metal ions as well as bicarbonate and sulfate salts) (4.19 ± 0.77) J/ gram ℃ and the specific heat of the four types of waste solution ranged from (3.20 ± 0.72) J/gram ℃ to (6.83 ± 1.71) J/gram ℃ and also it was found that the heat rate of hard water is 0,0471 ℃/s and the heat rate of the four types of waste solution is range from 0,0289 ℃/s to 0,0617 ℃/s.
MOTIF DETECTION IN INDONESIAN HAND-WOVEN FABRICS USING MATLAB Haryanto, Agung; Purnomosari, Endah; Mulyani, Wiwiek Eka; Abdullah, Fadil; Putra, Valentinus Galih Vidia; Kusrianto, Adi
Jurnal Inkofar Vol 9, No 1 (2025)
Publisher : Politeknik META Industri Cikarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.46846/jurnalinkofar.v9i1.439

Abstract

In our study, we developed an automated system for identifying Indonesian woven fabric motifs using MATLAB-based image processing. Procedures included obtaining visuals, enhancing quality, constructing a regional dataset, extracting features, measuring similarity, and analyzing colors. Correlation assessments enabled precise motif identification, while tailored color analysis improved similarity accuracy. The algorithm demonstrated effective recognition performance using dataset references. This approach offers a practical solution for cultural preservation, providing faster and more consistent results than manual evaluation
Co-Authors Aprilia, Hafiza Bambang Soegijono Budhy Kurniawan Cahaya Rosyidan Fadil Abdullah Fadil Abdullah Ferry Budhi Susetyo Hamidah, Siti Nur Haryanto, Agung Hermansyah Hermansyah Ihsan Ardiansyah, Muhammad Irwan Irwan Iskandar, Syarif Kusrianto, Adi Maulani, Mustamina Mohamad, Juliany Ningsih mulyani, wiwiek eka Munandar, Taufik Nababan, Frederik Gresia Ngadiono, Ngadiono Ngadiyono Ngadiyono, Ngadiyono Purnomosari, Endah Samura, Lisa Wijayono, Andrian Yusril Yusuf