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STUDI AWAL: PENGARUH GAME KEKERASAN TERHADAP AKTIVITAS OTAK ANAK MELALUI PEMETAAN SINYAL OTAK (BRAIN MAPPING) MENGGUNAKAN WIRELESS EEG Handayani, Nita; Yanuarif, Cecilia; Akbar, Yudiansyah
Jurnal Penelitian Fisika dan Aplikasinya (JPFA) Vol 7, No 1 (2017)
Publisher : Universitas Negeri Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26740/jpfa.v7n1.p1-12

Brain mapping adalah pemetaan aktivitas kelistrikan otak untuk mempelajari fungsional otak manusia. Pada studi ini, brain mapping digunakan untuk mempelajari pengaruh game kekerasan terhadap aktivitas fungsional otak anak dengan menggunakan wireless EEG (electroencephalography) berupa Emotiv Epoc 14-channel. Subjek penelitian ini adalah anak-anak pecandu game kekerasan (10 anak) dengan rentang usia antara 12-15 tahun. Aktivitas otak pada saat bermain game akan dibandingkan dengan kondisi rileks. Waktu perekaman EEG selama 42 menit untuk setiap subjek. Dari hasil analisis spektral daya menggunakan periodogram Welch menunjukkan bahwa pada saat bermain game, frekuensi gelombang delta dan theta meningkat terutama pada area frontal (F7, F3, FC5, FC6, F4, F8, dan AF4). Spektral daya gelombang alpha mengalami penurunan sedangkan gelombang beta mengalami peningkatan pada saat bermain game. Hal ini mengindikasikan bahwa anak mengalami beban mental dan berada pada kondisi stres pada saat bermain game kekerasan.

STUDI AWAL: PENGARUH GAME KEKERASAN TERHADAP AKTIVITAS OTAK ANAK MELALUI PEMETAAN SINYAL OTAK (BRAIN MAPPING) MENGGUNAKAN WIRELESS EEG Handayani, Nita; Yanuarif, Cecilia; Akbar, Yudiansyah
Jurnal Penelitian Fisika dan Aplikasinya (JPFA) Vol 7, No 1 (2017)
Publisher : Universitas Negeri Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26740/jpfa.v7n1.p1-12

Brain mapping adalah pemetaan aktivitas kelistrikan otak untuk mempelajari fungsional otak manusia. Pada studi ini, brain mapping digunakan untuk mempelajari pengaruh game kekerasan terhadap aktivitas fungsional otak anak dengan menggunakan wireless EEG (electroencephalography) berupa Emotiv Epoc 14-channel. Subjek penelitian ini adalah anak-anak pecandu game kekerasan (10 anak) dengan rentang usia antara 12-15 tahun. Aktivitas otak pada saat bermain game akan dibandingkan dengan kondisi rileks. Waktu perekaman EEG selama 42 menit untuk setiap subjek. Dari hasil analisis spektral daya menggunakan periodogram Welch menunjukkan bahwa pada saat bermain game, frekuensi gelombang delta dan theta meningkat terutama pada area frontal (F7, F3, FC5, FC6, F4, F8, dan AF4). Spektral daya gelombang alpha mengalami penurunan sedangkan gelombang beta mengalami peningkatan pada saat bermain game. Hal ini mengindikasikan bahwa anak mengalami beban mental dan berada pada kondisi stres pada saat bermain game kekerasan.

Simulation of the Effect of Dy3+ Dopant on the Mass Energy Absorption Coefficient and Relative Energy Response of TLD Made from Lithium Magnesium Borate Using MCNP Handayani, Nita; Novan Prawira, Dyon; Arianto, Fajar
Jurnal Ilmu Fisika Vol 16 No 2 (2024): September 2024
Publisher : Jurusan Fisika FMIPA Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/jif.16.2.166-176.2024

Thermoluminescence dosimeter (TLD) is widely used as a personal and medical dosimeter. Several TLD materials show the characteristics of mass energy absorption coefficient and energy response relative to ICRU (International Commission on Radiation Units and Measurements) issue material as an equivalent material for human body soft tissue. This research aims to analyze the effect of Dy3+ dopant on the mass-energy absorption coefficient and relative energy response of Lithium Magnesium Borate (LMB) materials. The simulation was carried out using Monte Carlo N-Particle (MCNP) software. Calculations based on simulation and theoretical results will be compared statistically using paired t-tests. The study showed that adding a Dy3+ dopant to TLD material made of Lithium Magnesium Borate (LMB) only affected the mass-energy absorption coefficient and relative energy response for low radiation energy. Adding Dy3+ dopant increased the mass energy absorption coefficient and relative energy response in a reasonably small value. Based on these results, LMBDy3+ produces a better mass-energy absorption coefficient value for TLD materials. The results of the statistical tests show a significant difference in the mass energy absorption coefficient value. At the same time, there is no significant difference between the simulation results and theoretical calculations for the relative energy response.

Rancang Bangun Prototype Single Electrode EEG Berbasis Arduino Uno Handayani, Nita; Kurniawan, Ade; Handayani, Yulia Savitri
Sunan Kalijaga Journal of Physics Vol. 3 No. 1 (2021): Sunan Kalijaga Journal of Physics
Publisher : Prodi Fisika Fakultas Sains dan Teknologi UIN Sunan Kalijaga Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14421/physics.v3i1.2301

Research on electroencephalography (EEG) design as a detector of brain signal activity in the frontal lobe based on Arduino Uno has been completed. EEG is a tool used to record electrical activity in the human brain. This research aims to make a non-clinical EEG device that is portable and low-cost. The research procedure is divided into three stages. The first stage is to design an EEG system using the Eagle application. The second stage is to create an EEG system which consists of the primary circuit of the EEG system, power supply, Arduino Uno, and two electrodes. The third stage is testing the EEG system, which includes testing the instrumentation amplifier, low pass filter, power supply, Arduino ADC consistency, and initial testing of EEG performance to record brain signals. The instrumentation gain is 51 times based on the test with an average accuracy rate of 99.09%. Meanwhile, the cut-off frequency obtained is 70 Hz. The comparison between brain signal measurements using a single electrode prototype EEG and standard EEG Emotiv Epoc with electrode placement at points Fp1 and A2 (ground) show almost the same pattern. So it can be said that the single EEG system created has been successfully used to record brain activity in the frontal lobe area.

Analisis Spektral Daya dan Koherensi Sinyal Electroencephalography (EEG) Area Frontal Pada Pecandu Rokok Handayani, Nita; Rahmah, Gebrina
Sunan Kalijaga Journal of Physics Vol. 3 No. 1 (2021): Sunan Kalijaga Journal of Physics
Publisher : Prodi Fisika Fakultas Sains dan Teknologi UIN Sunan Kalijaga Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14421/physics.v3i1.2311

This study will discuss the characteristics of the frontal area brain electrical signals in cigarette addicts before and after smoking based on QEEG analysis. Several neuroimaging techniques are used to understand the relationships between brain functionality. Quantitative Electroencephalography (QEEG) is a non-invasive technique that can be used to provide an overview of brain functionality through several physical quantities being assessed. Recording of brain signals using Emotiv Epoc 14 electrodes and only focuses on 8 frontal area electrodes (AF3, F7, F3, FC5, FC6, F4, F8, AF4) and 2 reference channels. The number of test subjects in the study was 5 people, male with an age range between 20-25 years. Brain recording was done when the eyes were open, eyes closed, and the task was to do math problems. Data analysis methods include pre-processing of EEG data to remove noise and artifacts, calculation of spectral power using Welch's periodogram, and analysis of brain functional connectivity by calculating the amount of intra-hemisphere and inter-hemisphere coherence. The results of the analysis of the spectral power showed that before smoking an increase in the spectral power occurred at the delta and alpha wave frequencies, and a decrease occurred in the theta wave frequencies. Meanwhile, after smoking an increase occurred in the frequency of delta, alpha and beta waves and a decrease occurred in the frequency of theta waves. The coherence analysis results showed a significant difference in the coherence of the right intra-hemisphere of theta wave frequency and the inter-hemisphere coherence of beta wave frequencies before and after smoking.

CT Number Conformity Test on Multislice CT Scan at Yogyakarta PDHI Islamic Hospital: Uji Kesesuaian CT Number pada CT Scan Multislice di Rumah Sakit Islam Yogyakarta PDHI Mas'uul, Ali; Indrawati, Silviana; Handayani, Nita
Sunan Kalijaga Journal of Physics Vol. 6 No. 1 (2024): Sunan Kalijaga Journal of Physics
Publisher : Prodi Fisika Fakultas Sains dan Teknologi UIN Sunan Kalijaga Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14421/physics.v6i1.5140

This research focuses on determining the CT number, which is the attenuation coefficient value of x-rays after passing through an organ. The level of energy attenuation depends on the initial energy of the x-rays and the atomic number of the object, which play a role in describing differences in the characteristics of organs or body tissues. This research aims to ensure the suitability of the CT number to obtain accurate information about CT scan images. Research procedures include observation, data collection, and data processing. The CT number data from the experimental results was then compared with the simulation results using IndoQCT software. The CT Number conformity test is carried out on a water phantom by adjusting the tube voltage, input current, and slice thickness. The Region of Interest (ROI) is made in the form of a circle at five measurement points, namely the central direction, 3 o'clock, 6 o'clock, 9 o'clock, and 12 o'clock. The research results, both direct testing and simulation using IndoQCT software, show that the CT number does not exceed the accuracy tolerance limit and uniformity, respectively, -4 ˂ HU ˂ +4 and -2 ˂ HU ˂ +2. Based on the analysis results, it can be concluded that the CT number measurements in the Radiology Unit at the Yogyakarta PDHI Islamic Hospital meet the requirements of BAPETEN Perka Number 2 of 2018.

IMPLEMENTATION OF LOCAL DIAGNOSTIC REFRENCES LEVEL (DRL) ON CT-SCAN AT RSI YOGYAKARTA PDHI Mas’uul, Ali Roo’in; Kanayanaquita; Handayani, Nita
Jurnal Kesehatan Vol 18 No 1 (2025): JURNAL KESEHATAN
Publisher : Universitas Islam Negeri Alauddin Makassar

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24252/kesehatan.v18i1.45016

One of the parameters of CT-Scan that is of particular concern is the radiation dose. Receipt of excessive radiation dose in patients will cause cancer. It is necessary to minimize the radiation dose received by patients in each examination by comparing the optimization index called Diagnostic Reference Level (DRL). This study aims to determine the local DRL value on CT-Scan at RSIY PDHI and compare and analyze with the national DRL value set by BAPETEN. This research is quantitative study with an experimental approach that aims to analyze the CTDIvol and DLP values on CT-Scan at RSIY PDHI. The DRL value is determined by determining the 75thpercentile value of CTDIvol and DLP values in CT-Scan examinations. This study was conducted on head examination in 156 patients without contrast and 2 patients with contrast, abdominal examination in 54 patients without contrast and 7 patients with contras, and thorax examination in 2 patients without contrast and 1 patient with contrast. In this study, the local DRL value of RSIY PDHI was obtained, with CTDIvol values in head, abdomen, and thorax examinations without contrast of 55,1; 12,5; and 5,4 mGy, respectively. And examination without contrast obtained values of 38,4; 10,2; and 4,47 mGy respectively. The DLP values in head, abdomen, and thorax examinations without contrast are 1122; 601; and 150 mGy.cm respectively. Examination with contrast obtained respectively 781; 479; and 151 mGy.cm. The DRL value obtained is categorized as safe because the local DRL value of RSIY PDHI has a lower value than the national DRL value set by BAPETEN.

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