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INDONESIA
Indonesian Applied Physics Letters
Published by Universitas Airlangga
ISSN : -     EISSN : 27453502     DOI : http://dx.doi.org/10.20473/iapl.v1i2.23444
Core Subject : Science, Engineering,
Chemical Engineering, Chemistry & Bioengineering Electrical & Electronics Engineering Materials Science & Nanotechnology Physics
Indonesian Applied Physics Letter is an multi-disciplinary international journal which publishes high quality scientific and engineering papers on all aspects of research in the area of applied physics and wide practical application of achieved results. The field of IAPL, which can be described as encounter of material science, theoretical science, computational, instrumentation, biomedical, geophysics and applied physics, has become distinguishable integrated discipline of research-based endeavor.
Arjuna Subject : Fisika dan Astronomi - Fisika dan Astronomi (Lain-Lain)
Articles 35 Documents
 1   2   3   4 
Design Of Autofocus Microscope With Histogram Method For Tuberculosis Bacteria Observation Mohammad Kholil; Riries Rulaningtyas; Winarno Winarno
Indonesian Applied Physics Letters Vol. 1 No. 1 (2020): June
Publisher : Universitas Airlangga

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20473/iapl.v1i1.21331

Abstract

This research was conducted to design an autofocus microscope with a histogram method that can observe Tuberculosis (TB) bacteria. The bacteria observed were preparations or phlegm preparations which had been stained with Ziehl Neelsen. The microscope is designed to be equipped with a program to control the focus motor that moves the microscope tube and the program to digitally display the image and histogram of TB bacteria. Histograms are analyzed based on intensity values spread between 0-255 and the entropy value is sought. The measurement results that have been carried out as many as 20 times the field of view of the TB bacteria show that the most focused areas have the highest entropy value with an accuracy level ranging from 81.90476% to 100% at 1000 times the magnification.
The Effect of Various Milling Time Duration On The Characteristic of Glass Ionomer Cement (GIC) with The Addition of Liquid Pmve-Ma Djony Izak Rudyardjo; Jan Ady; Aditya Budi Fauzi
Indonesian Applied Physics Letters Vol. 1 No. 2 (2020): Desember
Publisher : Universitas Airlangga

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20473/iapl.v1i2.23445

Abstract

A study entitled The Effect of Milling Time Duration on the Characteristics of Glass Ionomer Cement (GIC) Dental Cement with the Addition of Liquid PMVE-MA aims to determine the effect of milling time duration on the physical and mechanical properties of Glass Ionomer Cement, and to determine the optimum milling time duration in order to obtain GIC dental cement with the best characteristic to be applied as a dental restoration material. The duration of the milling time was 80 minutes, 90 minutes, 100 minutes, and 110 minutes. After the milling process, the next process was sintered at a temperature of 1200 for 1 hour to form Powder Glass Ionomer. Then Powder Glass Ionomer was added with Poly Methyl Vinyl Ether-Maleic Acid (PMVE-MA) to form a paste. The mixed paste was then formed. Sample characterization was the density test, the compressive strength test, and the vickers hardness test. The results of the density test obtained the highest value of 1.683 gram / cm3, the compressive strength test of 71.841 MPa, and the highest value of the hardness test of 92.3 Kg / mm2. These results increased as the increasing milling time duration up to 110 minutes.
Early Detection Of Acute Myocardial Infarction Using The Dempster Shafer Method Rahardian Tarunosudirjo; Endah Purwanti; Yudi Her Oktaviano
Indonesian Applied Physics Letters Vol. 1 No. 1 (2020): June
Publisher : Universitas Airlangga

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20473/iapl.v1i1.21332

Abstract

This study aims to design an android application to detect indications of Acute Myocardial Infarction (AMI) using the Dempster Shafer method. The system is built with initial symptoms input parameters and risk factor indicated by AMI. The system output consists of 2 classes, namely AMI and non-AMI. The test results obtained system accuracy of 98%.
DIAMOND LIKE CARBON (DLC) COATING ON CARBON STEEL WITH PLASMA TECHNIQUES FOR GAS PIPES Ilham Nur Dimas Yahya; Djony Izak Rudyardj; Jan Ady
Indonesian Applied Physics Letters Vol. 1 No. 2 (2020): Desember
Publisher : Universitas Airlangga

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20473/iapl.v1i2.23446

Abstract

A study about coating on carbon steel by plasma technique aims to determine the variation of time and pressure on the hardness and corrosion strength of a material. The material used in this research was carbon steel with carbon chest of 0.245%. This carbon steel was a plasma technique process with a temperature of 300oC and various pressure variations, such as 1.2 mbar; 1.4 mbar; 1.6 mbar; 1.8 mbar; And 2.0 mbar. The highest hardness was found at 1.8 mbar pressure, which was 161.7 VHN. Then set with a temperature of 300oC and a pressure of 1.8 mbar and a time variation, which were 1 hour; 1.5 hours; 2 hours; 2.5 hours; 3 hours. The largest hardness value was obtained at 3 hours with a hardness value of 161.7 VHN. Then the corrosion test obtained the optimum value at 2 hours with a corrosion value of 0.69 mpy. This was because on the surface of carbon steel there was a layer of Diamond Like Carbon (DLC).
Sodium Sulfate (Na2SO4) Detection Using Graphene Coated Microfiber M Yasin; Pujiyanto Pujiyanto; D Anngita; I A Fanany
Indonesian Applied Physics Letters Vol. 1 No. 1 (2020): June
Publisher : Universitas Airlangga

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20473/iapl.v1i1.21336

Abstract

We investigate the coating of graphene onto the silica microfiber sensor for sodium sulfate measurement at room temperature. The graphene obtained from graphene-polylactic acid filament was coated onto the microfiber based on drop casting methods. In this work, the graphene acts as cladding to interact with analyte as well as functions to trap either sodium cation or sulfate anion and increases the effective refractive index of the cladding. The sensor has  a good sensitivity of 0.82 dBm/% and resolution of 1.16 %. The sensitivity and resolution of the sensor were increased by the coating of graphene layer. 
3D Printing Geometric Scaffold Design Variation of Injectable Bone Substitutes (IBS) Pa Dyah Hikmawati; Sarda Nugraheni; Aminatun Aminatun
Indonesian Applied Physics Letters Vol. 1 No. 2 (2020): Desember
Publisher : Universitas Airlangga

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20473/iapl.v1i2.23447

Abstract

3D printing technology application in tissue engineering could be provided by designing geometrical scaffold architecture which also functionates as drug delivery. For drug delivery scaffold on bone tuberculosis, the cell pore of the geometric design was filled with Injectable Bone Substitutes (IBS) which had streptomycin as anti-tuberculosis. In this study, scaffolds were synthesized in three cells geometric filled by Injectable Bone Substitutes (IBS), Hexahedron, Truccated Hexahedron, and Rhombicuboctahedron, which had 2.5 mm x 2.5 mm x 2.5 mm size dimension and 0.8 mm strut. The final design was printed in 3D with polylactic acid (PLA) filament using the FDM process (Fused Deposition Modelling). The composition of IBS paste was a mixture of hydroxyapatite (HA) and gelatine (GEL) 20% w/v with a ratio of 60:40, streptomycin 10 wt% and hydroxypropyl methylcellulose (HPMC) 4% w/v. It was then characterized using Fourier-transform infrared spectroscopy (FTIR). Scaffold–paste characterization was included pore size test of 3D printing result before and after injected using Scanning Electron Microscope SEM, porosity test, and compressive strength test. The result showed that the pore of scaffold design was 1379 µm and after injected with IBS paste, the pore leaving 231.04 µm of size. The scaffold with IBS paste porosity test showed ranges between 40,78-70,04% while the compressive strength of before and after injected ranges between 1,110-634 MPa and 2,217-6,971 MPa respectively. From the test results, the scaffold 3D printing with IBS paste in this study had suitable physical characteristics to be applicated on cancellous bones which were infected by tuberculosis.
Tubule Formation Segmentation Of Histopathological Image Of Breast Cancer By Using Clustering Method Hadiyyatan Waasilah; Riries Rulaningtyas; Winarno Winarno; Anny Setijo Rahaju
Indonesian Applied Physics Letters Vol. 1 No. 1 (2020): June
Publisher : Universitas Airlangga

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20473/iapl.v1i1.21338

Abstract

Histopathological assessment is one of the examinations that allows the classification of breast cancer based on its level. Histopathological assessment factors are based on tubule formation, nuclear pleomorphism, and the mitotic count. This study only focused on tubule formation. The tubule formation was represented by a lumen surrounded a  nucleus. The segmentation of tubule histopathology of breast cancer method was using a combination of k-means clustering and graph cut. The image data used in this study were 15 images of breast cancer histopathology preparations using 5 variations in the number of clusters (k) in the k-means clustering method. The best results of tubule formation segmentation using k = 4, with an average value of balanced accuracy was 81.08% and the most optimal balanced accuracy results was 94.34%.
MECHANICAL CHARACTERISTIC STUDY OF COBALT ALLOY PREPARED BY POWDER METALLURGY METHOD Aminatun Aminatun; Jan Ady; Mega Farynda KD
Indonesian Applied Physics Letters Vol. 1 No. 2 (2020): Desember
Publisher : Universitas Airlangga

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20473/iapl.v1i2.23448

Abstract

This study was conducted to determine the effect of compaction pressure and sintering temperature variations on the properties of physical, mechanical, and micro cobalt alloy. Manufacture of the cobalt alloy with compositions 63,75%, chromium 30%, molybdenum 5%, manganese 0,5%, silicon 0,5%, and 0,25% nitrogen using powder metallurgy method. Variations of compaction pressure were 339,70 MPa, 396,31 MPa, dan 452,93 MPa, and sintered at temperature 12000C and 130 0C for 2 hours of holding time. Density was increased along with the increasing compaction pressure and sintering temperature (3,9-6,6 g/cm). The hardness was also increased along with the increasing compaction pressure and sintering temperature  205,1-316,2 VHN. XRD results showed that γ phase with fcc structure was formed at the temperature of 12000C and 13000C for all variations of pressure. SEM-EDX results showed that the oxygen content decreased along with increasing compaction pressure and sintering temperature. Based on ASTM F75 hardness standard, the sample with compaction pressure 452,93 MPa and sintered at 13000C was the best cobalt alloy with a hardness value of 316.2 VHN.
Synthesize and Characterization of Aluminum Oxide (Al2O3) Nanoparticle from Aluminum Waste for Nano fluid Application Darmawan Darmawan; Dani Gustaman Syarif; Djony Izak Rudyardjo
Indonesian Applied Physics Letters Vol. 1 No. 1 (2020): June
Publisher : Universitas Airlangga

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20473/iapl.v1i1.21330

Abstract

The research of Synthesis and Characterization of Aluminum Oxide (Al2O3) Nanoparticle from Aluminum Waste for Nanofluids has been done. The purpose from this research are knowing the influence of heating temperature tonanoparticle Al2O3 forming and the influence of composition to physico-chemical characteristic of nanofluids Al2O3.The heating temperature variation that that use of 6000C, 7000C, and 8000C. While the composition variation that use of 0.1 gram, 0.2 gram, 0.3 gram, and 0.5 gram. Aluminium Oxide nanoparticle were synthesized by heating Al(OH)3 as precursor derived from aluminum waste precipitation. Aluminum Oxide nanoparticle were suspended with 100 ml of Aquades and dispersed with ultra sonicated to produce Al2O3 nanofluids. Al2O3 nanoparticle has been obtained doing the characterization are the test of XRD (X-Ray Diffraction), SAA (Surface Area Analyzer), Density, Viscosity, CHF (Critical Heat Flux) and Zeta Potential. XRD data showed that the crystallized peak from Al2O3 nanoparticle are gamma alumina with the crystallite size of 6,5 nm (Debye-Scherrer Method). The Surface Area test result from Al2O3 nanoparticle is 149,98 m2/gram and obtained shape of11 nm. According zeta potential data, Nano fluids were stable at pH of 6,3 with zeta potential of 36,70 - 43,53 mV. The density test result obtained with the highest value about 1,503 g/cm3, The viscosity test of 0.92 mPa.s at the composition variation of 0.5 gram. The Nano fluids of the surface decreased 40% after 7 days. CHF test result of Al2O3 nanofluids obtained enhancement about 53,21% at the composition variation of 0.5 gram compared to that of Aquades.
Degradation and Corrosion of Biodegradable Metal Zn-xCa Adri Supardi; Miftachul Nur Afifah; Djony Izak Rudyardjo
Indonesian Applied Physics Letters Vol. 1 No. 2 (2020): Desember
Publisher : Universitas Airlangga

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20473/iapl.v1i2.23444

Abstract

Zn-based biodegradable metals (BMs) are considered as new potential in osteosynthetic implant devices. In this study Ca, which acts as an essential element in the human body, is used to improve the rate of Zn degradation and corrosion. The alloy was synthesized using the powder metallurgy method with two different processes: cold pressing followed by sintering (CP-S) and hot isostatic pressing (HIP). Microstructure properties, as well as in vitro degradation and corrosion were studied to determine the effect of adding Ca. Variations in the sample consist of Zn-0.5Ca, Zn-1Ca, Zn-1.5Ca and Zn-2Ca. The results and analysis of test data show that the addition of Ca increases the rate of corrosion and degradation of the materials. Better bonding and microstructure properties are obtained in Zn-2Ca samples which form CaZn13 phases and small porosity. As for the HIP process, a better microstructure is obtained compared to CP-S.

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