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All Journal Journal of Aceh Physics Society Journal of Physics: Theories and Applications INDONESIAN JOURNAL OF APPLIED PHYSICS Jurnal Ilmu Fisika Jurnal Teori dan Aplikasi Fisika Relativitas : Jurnal Riset Inovasi Pembelajaran Fisika Journal of Technomaterial Physics Journal of Applied Agricultural Science and Technology Jurnal Natural Teknologi dan Industri Pertanian Indonesia PESARE: Science and Engineering Service Journal
Evi Yufita
Jurusan Fisika, Fakultas Matematika Dan Ilmu Pengetahuan Alam, Universitas Syiah Kuala Jl. Syekh Abdul Rauf, Darussalam, Banda Aceh 23111, Indonesia
Agriculture, Biological Sciences & Forestry Astronomy Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Control & Systems Engineering Earth & Planetary Sciences Education Electrical & Electronics Engineering Energy Engineering Environmental Science Immunology & microbiology Industrial & Manufacturing Engineering Materials Science & Nanotechnology Neuroscience Physics Public Health Social Sciences

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Physical and Chemical Properties of Gayo Coffee Brewed by Boiling Method with Variation of Particle Coffee Ground Yufita, Evi; Muhammad Shadiq Maula, Teuku; Gunawati, Gunawati; Lloyd Woodfield, Peter; Yusibani, Elin
Jurnal Ilmu Fisika Vol 17 No 1 (2025): March 2025
Publisher : Jurusan Fisika FMIPA Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/jif.17.1.9-18.2025

Abstract

The effect of coffee ground particle size by the boiling method on the values of physical and chemical parameters is studied. The coffee used is Arabica (Luwak, wine, honey) and Robusta from the Gayo Highlands, Aceh Province, Indonesia. Extraction of the coffee brew uses the boiling method with different particle sizes of coffee grounds (fine and coarse). The caffeine content in the coffee brew is identified using the FieldSpec4 Hi-Res Spectrometer. The particle size of coffee grounds affected the coffee brew's physical properties and caffeine content. The physical properties in the form of the pH value of Arabica coffee brew are lower than Robusta in a range from 4.87 to 4.97 and 5.13 to 5.28, respectively. The pH of coffee brew with fine particle sizes is slightly higher than for coarse ones for Robusta coffee brew. The density of the brew is in the vicinity range of 0.99 g/cm3. Arabica and Robusta brews differ in viscosity and caffeine release, influenced by coffee particle size. Coarse particles yield more caffeine in Arabica, while fine particles release more in Robusta, demonstrating the impact of grind size on caffeine extraction in coffee.
Optimalisasi Pemberdayaan Laboratorium IPA dalam Upaya Meningkatkan Pemahaman Konsep-konsep Fisika bagi Guru IPA dan Siswa di Madrasah Aliyah Rajibussalim, Rajibussalim; Yufita, Evi; Zulfalina, Zulfalina; Abdullah, Faisal; Maimun, Teuku
PESARE: Jurnal Pengabdian Sains dan Rekayasa Vol 1, No 1 (2023): Oktober 2023
Publisher : Universitas Syiah Kuala

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24815/pesare.v1i1.33978

Abstract

A Science Laboratory at Senior High School is an important facility for students in learning Sciences, Technology, Engineering and Mathematics (STEM). Students learn concepts in the classroom and should be able to test and/or prove those concepts in experiments in Science Lab. However, many Science laboratories at schools were not fully operated due to the lack of skillful teachers or lab assistants who can manage Science laboratories with the highest standard and be able to conduct experiments with available KITs in those laboratries. Based on this phenomenon, a group of lecturers from Physics Department of Syiah Kuala University conducted a community service at school in order to share insights and skills related to a good practice in Laboratory management and demonstated how to run Physics experiments with available KITs at a designated school laboratory. The participants of this event were Science teachers and students at the school. Some of the outcomes of this community service are the increase in Laboratory management skills among science teachers at this school and increase in ability to utilise available Science KITs at that school for Physics experiments. The teachers and students were very happy and antusias to participate in this program and be benefited from this activity
Identifikasi Kandungan Radon (Rn-222) pada Bahan Bangunan Batu Bata di Kawasan Aceh Besar Evi Yufita, Rini Safitri
Jurnal Teori dan Aplikasi Fisika Vol. 1 No. 2 (2013): Jurnal Teori dan Aplikasi Fisika
Publisher : Department of Physics, Faculty of Mathematics and Natural Sciences, University of Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jtaf.v1i2.44

Abstract

The research about identifying of radon (Rn-222) esposure in a brick manufacture has been done. The aim is to identify the behavior of radon before and after burning in a brick factory in Aceh Besar district. Samples were taken at 6 villages namely Lhiep village, Krueng Anoi, Lamreung, Lambada Peukan, Kleng Cot Arun, and Neuheun. Bricks used as many as 60 pieces of the whole village. Measurement technique using a short-term radon monitoring tools Model 1027 Profetional Countinue Radon Monitor countinue with sampling methods and performed for 12 hours. The results obtained showed that the average value of the highest radon concentration in the bricks before firing from the village Lhiep with 1.80 pCi / l and the lowest in the village of Lambada Peukan of 0.72 pCi / l. In contrast, values obtained after burning an average radon concentration was highest in the village of Lambada Peukan was 0.52 pCi / l and the lowest in the Lhiep of 0.14 pCi / l. High or low radon concentration value on the bricks before burning than influenced than clay soils (clay) used are also expected due to geographical area (upland or lowland), whereas for bricks after firing is influenced by combustion processes that cause cracks in brick so that radon is the brick can come out through the slit bricks. So the bricks are in Aceh Besar district after the test was still relatively low at 2.0 pCi / l and
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 : Department of Physics, Faculty of Mathematics and Natural Sciences, University of Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jtaf.v3i1.77

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.
The Effect of Pre-annealing Temperature on Structural Characteristics of ZnO Thin Films Deposited by Sol-Gel Method M Mursal; Evi Yufita
Jurnal Teori dan Aplikasi Fisika Vol. 4 No. 1 (2016): Jurnal Teori dan Aplikasi Fisika
Publisher : Department of Physics, Faculty of Mathematics and Natural Sciences, University of Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jtaf.v4i1.101

Abstract

Pengaruh temperature pre-annealing terhadap struktur lapisan tipis ZnO yang dideposisi dengan metode Sol-Gel (spin coating) telah diteliti. Lapisan tipis ZnO dideposisi di atas substrat kaca preparat berukuran 2 cm x 2 cm. Pembuatan prekursor dilakukan dengan melarutkan ZnAc dengan pelarut etanol dan dietilene glikol (DEG). Proses deposisi precursor di atas substrat dilakukan dengan cara penetesan, kemudian diputar selama 20 detik dengan menggunakan spinner. Proses pre-annealing dilakukan selama 1 jam, dengan variasi temperatur 1500C, 2000C, dan 2500C. Selanjutnya dilakukan proses annealing pada temperatur 6000C selama 1 jam. Struktur mikro dan topografi permukaan lapisan tipis ZnO diuji masing-masing dengan menggunakan XRD dan AFM. Hasil penelitian menunjukkan bahwa lapisan tipis ZnO yang ditumbuhkan memiliki struktur heksagonal dengan parameter kisi a = 3,252 b = 3,253 c = 5,209 (c/a = 1,601). Temperatur pre-annealing mempengaruhi struktur mikro dan topografi permukaan lapisan tipis ZnO.
Entrance Surface Air Kerma (ESAK) in Adult Posteroanterior (PA) Chest Radiography: An Exploratory Analysis Intan Mulia Sari; Irhamni, Irhamni; Safitri, Rini; Yufita, Evi; Dewi, Ariana Shafira
Journal of Technomaterial Physics Vol. 8 No. 1 (2026): Journal of Technomaterial Physics
Publisher : Talenta Publisher

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32734/jotp.v8i1.24603

Abstract

This study estimated Entrance Surface Air Kerma (ESAK) for adult posteroanterior (PA) chest radiography and described ESAK patterns in relation to selected technical parameters and patient characteristics as an initial facility-level baseline. A descriptive–exploratory observational study was conducted in 10 adult patients using a Siemens digital radiography system equipped with Automatic Exposure Control (AEC). ESAK was estimated from X-ray tube output obtained from acceptance/constancy testing and combined with routinely recorded exposure parameters. Incident air kerma (INAK) was calculated first and then converted to ESAK using a backscatter factor assumed to be constant at 1.35. All examinations were performed at 125 kVp with a fixed source-to-image distance (SID) of 180 cm. Focus-to-skin distance (FSD) was not recorded directly and was estimated from SID and the recorded chest thickness. ESAK ranged from 0.09 to 0.17 mGy (mean, 0.13 mGy), and all values were below the BAPETEN optimization reference level of 0.2 mGy. In this limited sample, graphical patterns indicated that ESAK increased with mAs and body weight and decreased with increasing FSD. These findings are preliminary and require confirmation in a larger cohort; however, they may serve as a temporary local baseline for internal dose auditing and to inform the design of subsequent dose optimization studies.
Co-Authors Aztarina Ermy Vijaya Beti Nanda Sari Cut Dewi Afriani Desy Fitriana Dewi, Ariana Shafira Edwar Iswardy Elin Yusibani Endi Suhendi Faisal Abdullah Fasbir, Fasbir Fatriah Fatriah Fauzi . Fitriani Fitriani GUNAWATI, GUNAWATI Ikramullah ikramullah Intan Mulia Sari Irhamni Irhamni Lloyd Woodfield, Peter M Mursal Muhammad Ilham Noor Muhammad Ilham Nur Muhammad Isa Muhammad Shadiq Maula, Teuku Munzir Munzir Mursal, M Nurmalita . Nurmalita Nurmalita Nurrizka Nadia Nursabila Al Hazmi Nurul Fitri Nurul Fitri Rajibussalim Rajibussalim Rini Safitri Rini Safitri Saudiah Mawaddah Teuku Maimun Zulfalina . ZULFALINA ZULFALINA Zulfalina, Zulfalina Zulkarnain Jalil Zulkarnain Jalil Zuraini .