Article Per Year (5 Year)
p-Index From 2019 - 2024
0
P-Index
This Author published in this journals
All Journal Journal of Aceh Physics Society Jurnal Teori dan Aplikasi Fisika Jurnal Natural
Evi Yufita
Unknown Affiliation
Agriculture, Biological Sciences & Forestry Astronomy Biochemistry, Genetics & Molecular Biology Chemistry Earth & Planetary Sciences Energy Immunology & microbiology Materials Science & Nanotechnology Neuroscience Physics

Published : 8 Documents Claim Missing Document
Claim Missing Document
Check
Articles

Found 8 Documents
Search

 1 
Maintaining Quality Control by Using General Radiological Film Rini Safitri; Evi Yufita
Jurnal Teori dan Aplikasi Fisika Vol 3, No 1 (2015): Jurnal Teori dan Aplikasi Fisika
Publisher : Universitas Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jtaf.v3i1.1289

Abstract

Telah dilakukan pengujian karakteristik film radiografi untuk menentukan kualitas citra film radologi dengan cara melakukan kegiatan Quality Control (QC) pada mesin sinar X. Salah satu parameter yang mempengaruhi citra film tersebut adalah dosis sinar X yang diterima pasien dalam setiap penyinaran dan juga untuk memastikan keamanan pada pasien pada saat pemeriksaan penyakit serta memastikan mesin sinar X dapat beroperasi secara optimal. Kegiatan QC pencitraan film Rontgen ini dilakukan dengan dua cara pengukuran yaitu menggunakan sensitometer untuk melihat kualitas citra film dan densitometer untuk melihat densitas cahaya yang dihasilkan melalui film radiografi. Dari hasil penelitian diperoleh bahwa film radiografi dengan merek AGFA layak digunakan karena daerah fog nya tidak melebihi batas toleransi yaitu 0.01 OD, dan daerah shoulder menghasilkan densitas maksimum yaitu 2,25 OD dimana daerah ini masih dapat dianalisa.
Heat Energy of Candlenut Shell and Tamarind Skin Briquet with Variation on Particle Size and Pressure Pressing Cut Dewi Afriani; Evi Yufita; Nurmalita Nurmalita
Journal of Aceh Physics Society Volume 6 Number 1, March 2017
Publisher : PSI-Aceh

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (166.2 KB)

Abstract

Pemanfaatan limbah dari hasil perkebunan dapat digunakankan untuk pembuatan briket bioarang yang energinya dapat diperoleh sebagi energi alternatif. Pada penelitian ini dilakukan pembuatan briket bioarang campuran antara limbah tempurung kemiri dan kulit asam jawa dengan memvariasikan tekanan pengepresan (4 ton, 5 ton, 6 ton) dan ukuran partikel dari cangkang kemiri (20 mesh, 40 mesh, 60 mesh) untuk mengetahui kualitas briket yang dihasilkan. Hasil penelitian menunjukkan bawa nilai kalor briket bioarang tertinggi berada pada tekanan pengepresan 6 ton dengan ukuran butir 60 mesh sebesar 3350 kal dengan porositas sebesar 5,58 % dan kadar air sebesar 7,6 %. Farm waste utilization can be done by making a briquet as an alternative energy. In this research mixture of waste candlenut shell and tamarind skin as a briquet is studied by varying the pressure pressing (4 tons, 5 tons, 6 tons) and grain size of the candlenut shell (20 mesh, 40 mesh, 60 mesh) to determine the quality of briquettes resulting from. The results show that the highest heat energy of briquet currently on the pressing pressure of 6 tons with a grain size of 60 mesh at 3350 cal with a porosity of 5.58% and a water content of 7.6%. Keywords: briket bioarang, tempurung kemiri, kulit asam jawa, tekanan pengepresan, ukuran butir
The Effect of Sintering Time on Surface Morfology of Pb-Doped Bi-2223 Oxides Superconductors Prepared by the Solid State Reaction Methods at 840 oC Evi Yufita; Nurmalita .
Journal of Aceh Physics Society Volume 5 Number 1, March 2016
Publisher : PSI-Aceh

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (199.915 KB)

Abstract

This study was investigating the effect of sintering time (30 h, 32 h, and 34 h) on surface morphology of PbdopedBi-2223 oxides of superconductors prepared by the solid-state reaction method at 840 oC. Thesuperconductor was characterized by X-Ray Diffraction (XRD) and Scanning Electron Microscopy (SEM).In the present study, phase purity, volume fraction, surface morphology, texturing, crystallinity, grainconnectivity and grain size of the bulk samples are found and compared with each other. The enhancementin the sintering time is confirmed that it will decrease Bi-2223 phase fraction and increase the impurity ofthe samples. SEM images shows that the sample has the best crystallinity, grain connectivity and largestgrain size. Based on the present results, it is conclude that the surface morphological is improving with theincreasing of the sintering time.
Study of Viscosity Measurement by Curved Vibrating Wire Method Saudiah Mawaddah; Elin Yusibani; Evi Yufita
Journal of Aceh Physics Society Volume 4 Number 1, March 2015
Publisher : PSI-Aceh

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (86.742 KB)

Abstract

A simple and compact sensor has been designed for measuring a viscosity of a fluid. The sensor consists of a magnet and a curved thin wire made of copper. The function generator supplies a frequency and the voltage output was reading by the lock-in amplifier. The measuring voltages were analyzed by the curve fitting method numerically.
Identification of Adhesive Material Substance in Ancient Fortress Located at Aceh Besar using XRF Nurul Fitri; Elin Yusibani; Evi Yufita
Journal of Aceh Physics Society Volume 5 Number 2, September 2016
Publisher : PSI-Aceh

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (142.49 KB)

Abstract

Penelitian ini bertujuan untuk menganalisa kandungan material perekat yang digunakan pada tiga benteng purba di kawasan Aceh Besar, yaitu Benteng Indrapatra (BIP), Benteng Inong Balee (BIB), dan Benteng Kuta Lubok (BKL). Analisa dilakukan menggunakan X-Ray Flourescence (XRF) dengan metode Fusion Beads. Hasil uji XRF menunjukkan bahwa ketiga benteng tersebut memiliki kandungan senyawa oksida yang sama, dengan persentase CaO sebanyak 46,16-51,37%, SiO2 sebanyak 2,56-6,68%, MgO sebanyak 1,01-2,16%, Al2O3sebanyak 0,73-1,18%, dan Fe2O3 sebanyak 0,53-0,70%. Senyawa-senyawa tersebut merupakan komposisi penyusun dari batu kapur jenis Kalsit. Hasil tersebut dibandingkan dengan material perekat yang digunakan saat ini (Semen) didapatkan memiliki komposisi yang berbeda. Semen mengandung komposisi oksida SiO2 dan SO3yang lebih besar daripada material perekat pada benteng purba yaitu sebesar 18% dan 3% untuk sampel sebanyak 1 gr. Preliminary study about adhesive material content in ancient fortress at Aceh Besar has been done. The fortress are Indrapatra, Inong Balee and Kuta Lubok. The sample is analyzed using X-Ray Flourescence (XRF) with Fusion Beads method. The result of XRF shows that all of the fortress have the same oxide compound which is CaO, with percentage of (46,16-51,37)%, SiO2 around (2,56-6,68)%, MgO around (1,01-2,16)%, Al2O3 around (0,73-1,18)%, and Fe2O3 around (0,53-0,70)%. The compounds are constituent of limestone of calcite. The results have been compared with the modern adhesive material (cement). It was found that cement has a different oxide composition with the adhesive material used in ancient fortress. Cement contains SiO2 and SO3 more than ancient adhesive material, the values are 18% and 3%, respectively, in one gram sample.
Synthesis and Microstructure Properties of (Bi,Pb)2Sr2Ca1Cu2Oy Ceramic Superconductor nurmalita .; Zuraini .; Evi Yufita; Fauzi .
Journal of Aceh Physics Society Volume 4 Number 1, March 2015
Publisher : PSI-Aceh

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (138.838 KB)

Abstract

Properties of (Bi, Pb)2Sr2Ca1Cu2Oy ceramic superconductors were prepared by the melt textured growth methods in order to investigate the effects of the slow cooling time on the microstructur.  Phase analyses of the samples by X-ray diffraction (XRD) has been carried out to assess the effects of the slow cooling time. From XRD analyses, the addition to the sample of  the slow cooling time degrades formation of the high-Tc Bi-2212 phase. The possible reasons for the observed degradation in the microstructure properties due to the slow cooling time addition were discussed.
Identification Content of the Red Dragon Fruit Extract Skin Using Fourier Transform Infrared (FTIR) and Phytochemistry Muhammad Ilham Noor; Evi Yufita; Zulfalina .
Journal of Aceh Physics Society Volume 5 Number 1, March 2016
Publisher : PSI-Aceh

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (89.621 KB)

Abstract

Corrosion is a decline in the quality of the metal due to electrochemical reaction between the metal by a corrosive medium. One effort to reduce the rate of corrosion is by adding inhibitors. Organic inhibitors that can be used include antioxidants and vitamin C. To determine both the content of the test method is used Fourier Transform Infrared (FTIR) and phytochemicals. FTIR is a method to measure used to determine the group and the type of bonding of a compound based on the value of the wave number of a plant. Phytochemical screening is a test of the qualitative secondary metabolites biologically active compounds found in plants. In this study used a sample of red dragon fruit. The results of the analysis provide information regarding the types of biologically active compounds and levels of the active compound contained in the red dragon fruit.
QUALITY CONTROL X RAYS MAMMOGRAPHY IN THE EFFORT MITIGATION INCREASING NUMBER OF CANCER PATIENTS Rini Safitri; Evi Yufita
Jurnal Natural Volume 17, Number 1, March 2017
Publisher : Universitas Syiah Kuala

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (195.316 KB) | DOI: 10.24815/jn.v17i1.6970

Abstract

Abstract. Early detection of breast cancer is the first step in prevention that can be done by women, therefore when one is diagnosed with breast cancer, the appropriate treatment can be performed quickly and accurately. Early diagnosis of breast cancer can be a way of mitigation in preventing breast cancer through the use of mammography. Bureau of Radiology as said by The Joint Commission on Accreditation of Hospitals (JHCA) stated that one of the responsibilities of the radiology unit is to control the quality of service which aims to minimize the radiographic image repetition factor; as well as maximizes the quality of radiographic image. Quality control tests are an effort that is needed on the mammography X-ray diagnostics tools. This is done to maintain the quality of expected output. The parameters that are included within the radiation output are the magnitude of current and the voltage of tube that are produced; therefore they remained constant and correspond to the recommended standard. Bureau of Radiological Health, as said by JHCA mentioned that to control the quality of image which will minimize the radiographic image repetition and maximizes the quality of radiographic image. Therefore the radiation output will not be dangerous later. The early stage of the quality control test on the machine was conducted by setting all the filtrations which were placed to capture the x-ray on the x-ray plane tube with minimum value. Then, ionization chamber is placed on the test subject points; right after that the distance between it to the radiation source is noted. The x-ray film is place on a film on the compression table of the patient and the distance between film and the focus point is noted. This is then exposed using a target filter Mo/Mo by setting the current as well as variation the voltage and time. The standard voltage measurements are 20-33kVp. This data is from the observations of time exposure; the output value is then noted. The above procedure is conducted from the minimum voltage to the maximum voltage. The output ray is measured for each voltage. The same procedure is conducted to the target filter Mo/RH. The results obtained are that the greater the input voltage and current will subsequently produce greater doses, therefore the exposure has exceeded the standard limit 0.1 mHy with longer exposure time. The HVL density thickness on the mammography X-ray machine determined the quality of the beam and the doses of x-ray exposure on the mammography machine. The output stability of x-ray beam exposure in the mammography machine mode Mo/Mo still fulfill the standard which is the value of 69% Keywords: Quality Control, Sinar-X, mammography, Mp/Mo, Mo/RH
Co-Authors Cut Dewi Afriani Elin Yusibani Fauzi . Muhammad Ilham Noor Nurmalita . Nurmalita Nurmalita Nurul Fitri Rini Safitri Rini Safitri Saudiah Mawaddah Zulfalina . Zuraini .