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A Development of Textile Fabric Homogeneity Based on Computational Physics (Image Processing) with MATLAB Valentinus Galih Vidia Putra; Andrian Wijayono; Cahaya Rosyidan; Juliany Ningsih Mohamad
Jurnal Fisika FLUX Vol 17, No 2 (2020): Jurnal Fisika Flux: Jurnal Ilmiah Fisika FMIPA Universitas Lambung Mangkurat
Publisher : Lambung Mangkurat University Press

The textile industry is currently moving towards to the fourth Industrial Technological Revolution. One of the applications of the industrial revolution 4.0 is in the field of computational physics. The application of applied physics especially computational physics on textile science can be initiated in analyzing the quality of fabric in the textile coloring process. This research focuses on a technique measuring the quality of fabric that occurred in the coloring process using the image processing technique by measuring the color space in the RGB (Red, Green, Blue) space as the length of colors vector of the fabric. In this study, the technique has been made using MATLAB 2009a software and Logitech C525 HD webcam. The result of this research shows that computational physics especially image processing by MATLAB can be implemented to measure and to determine the color quality of fabric accurately by comparing with the samples.

Developing heat rate and heat capacity measurement instruments of textile waste solution in the textile dyeing process Valentinus Galih Vidia Putra; Endah Purnomosari; Juliany Ningsih Mohamad
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

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.

PENENTUAN ARAH PATAHAN YANG TERDAPAT DI PULAU TIMOR DAN SEKITARNYA MENGGUNAKAN MEKANISME SUMBER 3D GEMPABUMI Juliany Ningsih Mohamad
Jurnal Fisika : Fisika Sains dan Aplikasinya Vol 1 No 1 (2016): Jurnal Fisika : Fisika Sains dan Aplikasinya
Publisher : Universitas Nusa Cendana

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (687.723 KB)

Abstrak Telah dilakukan penelitian tentang penentuan arah patahan yang terdapat dipulau Timordan sekitarnya menggunakan mekenisme sumber 3D gempabumi, dengan menggunakan data sekunder yakni data yang diambil katalog International Sesmology Center (ISC) dan U.S. Geological Survey/National Earthquake Information Center (USGS/NEIC) sejak tahun 1965-2013 pada koordinat 8,5° - 10,5°LS dan 123° - 126° BT. Analisis dilakukan dengan menggunakan Arcgis 9.3 untuk pembuatan peta coastline pulau Timor dan sekitarnya, software ZMAP 6.0 untuk pembuatan peta seimisistas berdasarkan kedalaman, sedangkan untuk penentuan arah patahan dan mekanisme sumber dari gempabumi yang terjadi digunakan software 3D Focal Mechanism. Hasil penelitian menunjukkan bahwa di pulau Timor dan sekitarnya yang dominan merupakan gempabumi dangkal (<70 km) yang terdapat di pulau Timor dan gempabumi sedang (70<h<300 km) yang cenderung ke arah baratdaya, sedangkan dari hasil mekanisme sumber menunjukkan gempabumi yang terjadi di pulau Timor dan sekitarnya didominasi oleh gempabumi akibat sesar turun berarah barat laut. Hal ini juga diungkapkan dari hasil mekanisme sumber 3 D dengan kedalamnya yang terlihat bahwa pola patahan yang terjadi diakibatkan oleh adanya penunjaman lempeng Indo-Australia di bawah lempeng Eurasia ke arah baratlaut pulau Timor. Kata kunci: Gempabumi, patahan, 3D mekanisme sumber Abstract Determination of Fault Directional at Timor Island and surroundings using 3D Focal Mechanism. Has been done a reseach on determining of fault directional at Timor Island and surrounding using 3D focal mechanisms earthquake from US Geological Survey / National Earthquake Information Center (USGS / NEIC) since the year 1965-2013 at 8.5 ° - 10.5 ° S and 123 ° - 126 ° E.Analysis used ArcGIS 9.3 for creating coastline maps, ZMAP 6.0 seimisisty map by depth, and 3D Focal Mechanism for fault directional. The results showed that on the Timor island and the surrounding, dominated shallow earthquake (<70 km) and the medium (70 <h <300 km) tends toward the southwest, while the results of the mechanism earthquakes indicate earthquakes occurred on the island of Timor and the surrounding focal mechanism dominated by normal fault to north-west. It also showed by 3D focal mechanism that fault occur caused by the subduction of the Indo-Australian plate under the Eurasian plate to the north-west of the island of Timor. Keywords: earthquake, fault, 3D focal mechanism

Novel Method for Fire Retardancy of Cotton Fabrics Coated by Spinach Leaf Extract Assisted by Corona Discharge Plasma Valentinus Galih Vidia Putra; Andrian Wijayono; Juliany Ningsih Mohamad
Dinamika Kerajinan dan Batik: Majalah Ilmiah Vol 37, No 2 (2020): DINAMIKA KERAJINAN DAN BATIK : MAJALAH ILMIAH
Publisher : Balai Besar Kerajinan dan Batik

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22322/dkb.v37i2.6038

The application of material physics in the functional textile field has been widely applied, one of which is plasma technology. In this research, the fire-retardant properties have been developed in the cotton fabric textile material using spinach leaf extract and comparison of fire-retardant resin on the market using plasma technology. The flame-retardant is applied to the cotton fabric using the atmospheric-pressure plasma method with a tip-cylinder electrode. The cotton fabric used is a cotton fabric that has undergone a process of bleaching and mercerization. In this research, two types of methods have been carried out, namely the immersion method on the fire-retardant resin substance with atmospheric pressure plasma pre-treatment and the immersion method on spinach leaf extract with atmospheric pressure plasma treatment. Research shows that there is an increase in the fire-retardant properties of cotton fabrics that have been given treatment. The assessment of fire-retardant properties was tested using the standard method of fire-retardant ASTM D6413-08 vertical method. In this research, atmospheric-pressure plasma treatment with a time variation of 2 minutes and 4 minutes has been carried out. The results showed that the cotton fabric treated with the immersion method on spinach leaf extract and atmospheric pressure plasma pre-treatment had better fire-retardant properties. It has also been found that the length of time the plasma treatment will affect the fire-retardant properties of cotton fabrics.

PROTOTIPE PAKAIAN ANTI RADIASI UNISEX SPORTSWEAR SMARTPHONE DENGAN PAPARAN RADIASI PLASMA PIJAR KORONA ELEKTRODA TIP- SILINDER Valentinus Galih Vidia Putra; Annisa Diyan Fitri; Ichsan Purnama; Juliany Ningsih Mohamad
Jurnal Kumparan Fisika Vol 3, No 1 April (2020): Jurnal Kumparan Fisika
Publisher : Unib Press, Universitas Bengkulu

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33369/jkf.3.1.19-24

ABSTRAK Pada penelitian ini telah dikembangkan sebuah produk pakaian anti radiasi unisex sports wear menggunakan teknologi plasma pijar korona elektroda tip-plane. Plasma pijar korona dibangkitkan dengan listrik tegangan tinggi serta menggunakan elektroda asimetri (lancip dan plat).Pembuatan pakaian anti radiasi menggunakan bahan rajut yang telah diplasma sertadilapisi dengan tinta konduktif. Hasil studi memperlihatkan bahwa metode pembuatan pakaian dengan plasma pijar korona telah berhasil mengurangi radiasi gelombang elektromagnetik. Kata kunci: plasma pijar, pakaian unisex sportswear, elektroda tip-plane, anti radiasi ABSTRACT This paper describes the making of an anti-radiation smartphone unisex sportswear. The anti-radiation patch was developed by first modifiying the surface of the textile using atmospheric pressure plasma technology. The plasma corona discharge is generated by using a high voltage electricity withasymmetrical electrodes (tip and plane). The treated patch was than coated with graphite based conductive ink. The result of thisresearchindicates that an anti-radiation clothe patch was succesfully shield an electromagnetic radiation from a smartphone. Keywords: plasma discharge, unisex sportswear, tip-plane electrode, electromagnetic shielding

A New Model to Calculate Stress Relaxation of Viscoelastic Material for Polyester-Wool-Spandex Yarn with Analytical Mechanics Approach Valentinus Galih Vidia Putra; Juliany Ningsih Mohamad; Yusril Yusuf
Jurnal Penelitian Fisika dan Aplikasinya (JPFA) Vol. 11 No. 2 (2021)
Publisher : Universitas Negeri Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26740/jpfa.v11n2.p94-105

Many researchers have studied the mechanical properties of yarn in textile science because mechanical properties are the essential parameter in determining yarn quality. This research aims to make a new model and prediction of the material properties of textile yarns, especially for stress relaxation of viscoelastic textile yarn for polyester-wool-spandex yarn cases. In this research, a new approximation of the analytical mechanics model of stress relaxation using a system of four springs and a dashpot to determine viscoelastic yarn properties as polyester-wool-spandex has been studied. A yarn movement equation for viscoelastic yarn as polyester-wool-spandex having 36 yarn count number (in unit tex or g/km) has been formulated using analytical mechanics, and the model has been validated experimentally. The coefficient of determination R2 ranges from 0.82, which shows the closeness between the experimental results and the theoretical predictions. In this research, it is found that this model can be implemented to determine the viscoelastic material of yarn based on the properties of yarn as stress relaxation using the analytical mechanics approach.

Developing heat rate and heat capacity measurement instruments of textile waste solution in the textile dyeing process Valentinus Galih Vidia Putra; Endah Purnomosari; Juliany Ningsih Mohamad
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

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.

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