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Jurnal Fisika : Fisika Sains dan Aplikasinya
Published by Universitas Nusa Cendana
ISSN : 25035274     EISSN : 26571900     DOI : https://doi.org/10.35508/fisa
Core Subject : Science, Engineering,
Astronomy Earth & Planetary Sciences Electrical & Electronics Engineering Materials Science & Nanotechnology Physics
Jurnal Fisika – Fisika Sains dan Aplikasinya diterbitkan oleh Jurusan Fisika, Fakultas Sains dan Teknk - Universitas Nusa Cendana secara berkala (setiap 6 bulan) yaitu setiap bulan April dan Oktober, dengan tujuan untuk menyebarluaskan hasil penelitian, pengkajian, dan pengembangan bidang Fisika beserta dengan terapan ilmu fisika. Artikel yang dipublikasi dalam Jurnal FiSA dapat berupa Artikel Penelitian maupun Artikel Konseptual (non-penelitian).
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Articles 12 Documents
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Search results for , issue "Vol 5 No 1 (2020): Jurnal Fisika : Fisika Sains dan Aplikasinya" : 12 Documents clear
STUDI PENGHITUNG PACKING FRACTION MENGGUNAKAN FISIKA CITRA Valentinus G. V. Putra; Juliany Ningsih Mohamad
Jurnal Fisika : Fisika Sains dan Aplikasinya Vol 5 No 1 (2020): Jurnal Fisika : Fisika Sains dan Aplikasinya
Publisher : Universitas Nusa Cendana

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (419.813 KB) | DOI: 10.35508/fisa.v5i1.2384

Abstract

Abstrak Packing fraction menunjukkan derajat susunan serat pada suatu benang, yang dihitung berdasarkan perbandingan antara volume serat terhadap volume benang atau lua serat total terhadap luas benang. Pada kondisi panjang serat dan panjang benang memiliki panjang yang sama, maka untuk menghitung volume serat maupun volume benang dapat didekati dengan penghitungan luas permukaan serat total dan luas permukaan benang. Penghitungan rasio luas permukaan serat terhadap luas permukaan benang yang akurat sangatlah sulit didapatkan dikarenakan bentuk permukaan serat yang sembarang dan perhitungan kalkulus matematika yang rumit. Untuk mengatasi masalah tersebut, maka diperlukan suatu metode fisika citra untuk menghitung luasan permukaan serat sembarang. Pada penelitian ini telah didapatkan suatu metode untuk mengukur nilai Packing fraction dengan lebih baik menggunakan metode pengolahan citra untuk mendapatkan luasan acak serat. Kata Kunci: packing fraction; benang; tekstil; image processing Abstract The Study Calculation of Packing fraction using physics of imaging. Packing fraction shows the degree of arrangement of fibers in a yarn, which is calculated based on the ratio between the volume of fiber to the volume of yarn or total fiber area to yarn area. In the condition of fiber length and yarn length have the same length, then to calculate volume of fiber and volume of yarn it can be approached by calculating the total fiber surface area and yarn surface area. Precise calculation of the fiber surface area to yarn surface area is very difficult to obtain due to the arbitrary shape of the fiber surface and complex mathematical calculation. To overcome this problem, we need an image processing method to calculate the surface area of any fiber. In this research, a method for measuring the value of Packing fraction has been better obtained using an image processing method to obtain a random area of ​​fiber. Keywords: packing fraction; yarn; textile; image processing
RADIATION MEASUREMENT OF RADIOISOTOPE IN MINERAL DEPOSIT AT SUBDISTRICT OF MIDDLE KUPANG WEST TIMOR ISLAND INDONESIA Bartholomeus Pasangka; Frederika Rambu Ngana
Jurnal Fisika : Fisika Sains dan Aplikasinya Vol 5 No 1 (2020): Jurnal Fisika : Fisika Sains dan Aplikasinya
Publisher : Universitas Nusa Cendana

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (914.837 KB) | DOI: 10.35508/fisa.v5i1.2388

Abstract

The general objective of this work was investigation of radioisotope distribution and accumulation center in mineral deposit at sub-district of Middle Kupang West Timor Island Indonesia. The purposes of research were: to map of radioisotope distribution in the mineral deposit, to estimate area of radioisotope accumulation center in the mineral deposit, to establish range of nuclear radiation counts in the center region of radioisotope content in mineral deposit. The general methods used in this research were observation, survey, mapping, analysis, and interpretation. Procedures detail of research consists of: observe and identify the potential region and plot gridding, calibrate equipment necessary, measure background count in around of survey location and nuclear radiation in the survey location, plot of three dimensions curve and contour after corrected by background count. Based on geology information or geology data (drilling data) three depth levels determined (about 20 m, 40 m and 60 m), Radiation powers were calculated for estimation of accumulation center of radioisotope in deposit mineral, and contour and three dimensions curves of radiation power of radioisotope in deposit mineral were plotted. Results: Based on three dimensional curves and contour map (radiation counts and radiation powers on three levels) of radioisotope in mineral deposit respectively was distributed on area 3.00 x 106 m2, and 1.56 x 104 m2. The interval of radiation counts of radioisotope in mineral deposit was 10 counts per minute-137 counts per minute. Keywords: Radiation, measurement, radioisotope, mineral, deposit

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