A5006927247- Electromagnetic Fields and Biological Effects
- Wireless Body Area Networks
- Energy Harvesting in Wireless Networks
- Electromagnetic Compatibility and Measurements
- Radiation Dose and Imaging
- Ultrasound and Hyperthermia Applications
- Noise Effects and Management
- Millimeter-Wave Propagation and Modeling
- Advanced Radiotherapy Techniques
- Microwave Imaging and Scattering Analysis
- Radiation Therapy and Dosimetry
- Advanced MIMO Systems Optimization
- Medical Imaging Techniques and Applications
- Health and Wellbeing Research
- Antenna Design and Analysis
- Health, Environment, Cognitive Aging
- Advanced MRI Techniques and Applications
- Telecommunications and Broadcasting Technologies
- Radiopharmaceutical Chemistry and Applications
- Microwave and Dielectric Measurement Techniques
- Air Quality and Health Impacts
- Electromagnetic Simulation and Numerical Methods
- Non-Destructive Testing Techniques
- Ferroelectric and Piezoelectric Materials
- Chronic Disease Management Strategies
Electronics and Telecommunications Research Institute
2015-2024
Laboratoire Traitement et Communication de l’Information
2022
Télécom Paris
2022
National Radio Research Agency
2021-2022
Institute of Electrical and Electronics Engineers
2021
ORCID
2021
Chungbuk National University
2020
Kwangwoon University
2013
Dankook University
2013
National Institute of Standards and Technology
2009
The rapid increase in mobile phone use young people has generated concern about possible health effects of exposure to radiofrequency (RF), extremely low frequency (ELF) electromagnetic fields (EMF). MOBI-Kids, a multinational case-control study, investigates the potential childhood and adolescent EMF from communications technologies on brain tumor risk 14 countries. which aims include approximately 1,000 cases aged 10-24 years two individually matched controls for each case, follows common...
This paper reports the electromagnetic field (EMF) exposure levels from fifth generation (5G) services. Three mobile operators in South Korea launched world's first 5G New Radio networks using 3.5 GHz band April 2019. The transmitted power of uplink slots and synchronization signal reference received (SS-RSRP) user equipment (UE) were measured Seoul. samples, averaged over a 1-s duration, obtained for traffic period approximately 270 h October 2019 to early February 2020 file transfer...
Because the position and direction of human body is not fixed in an actual environment, incidence electromagnetic field (EMF) from mobile communication base stations, WiFi access points, broadcasting towers, other far-field sources arbitrary. To analyze overall health effects radio frequency EMF exposure, dosimetric assessment for such environmental exposures created unspecified number daily life, along with specific sources, must be quantified. This study aimed at numerically evaluating...
목적 본 연구는 임상 간호사의 의사소통능력과 직무스트레스, 직무만족도 수준을 확인하고 그 차이와 관계를 확인하고자 수행되었다. 방법 서울과 경기지역의 임상간호사 209명을 대상으로 대인 의사소통능력 척도(GICC), 간호직무스트레스척도, 간호사 직무만족도구를 사용하여 빈도와 백분율, 평균과 표준편차, 상관분석 및 t-test, ANOVA를 SPSS 16.0 program으로 분석하였다. 결과 임상간호사의 평균은 3.30(<TEX>${\pm}0.43$</TEX>)이며, 임상간호사가 느끼는 직무스트레스 2.90(<TEX>${\pm}0.33$</TEX>), 3.01(<TEX>${\pm}0.30$</TEX>)이었다. 직무스트레스(r=-.247, p<.001) 그리고 직무스트레스와 직무만족도(r=-.215, p=.002)간에는 통계적으로 유의한 음의 상관관계가, 의사소통과 직무만족도(r=.248, p<.001)간에는 양의 상관관계가 제시되었다. 결론 임상간호사를 의사소통능력이 현재의...
Studies examining prenatal exposure to mobile phone use and its effect on child neurodevelopment show different results, according child's developmental stages.To examine in children up 36 months of age, following radiofrequency radiation (RFR) exposure, relation lead exposure.We analyzed 1198 mother-child pairs from a prospective cohort study (the Mothers Children's Environmental Health Study). Questionnaires were provided pregnant women at ≤20 weeks gestation assess call frequency...
ABSTRACT⎯The dimensions of the human body vary by age, sex, and race.The internal structure outer a exposed to an electromagnetic field is important for accurate dosimetry.The average physical size Korean adult males between ages 18 24 was investigated, male volunteer selected whose condition within standards, ± 5%.Magnetic resonance images partially computerized tomography were acquired.The intervals transverse 1 mm head 3 rest body.About 30 different tissues manually classified anatomist...
Mobile phones differ in terms of their operating frequency, outer shape, and form location the antennae, all which affect spatial distributions electromagnetic field level absorption human head or brain. For this paper, specific rate (SAR) was calculated for four anatomical models at different ages using 11 numerical phone shapes antenna configurations. The represent types accounting around 86% approximately 1400 commercial released into Korean market since 2002. Seven selected have an...
ABSTRACT⎯A whole-body voxel model of a 7-year-old male volunteer was developed from 384 axial magnetic resonance images (MRIs).The MRIs were acquired with intervals 3 mm for the entire body in coil.In order to reduce MRI acquisition time child, repetition and echo times under T1 weighted image chosen be 566 ms 8 ms, respectively.The classified according 30 types tissues known electrical parameters.The adjusted physical average Korean boys.The weight model, calculated mass tissue densities,...
The current IEEE 1528 and IEC 62209-1 standards specify a simplified physical model of the human head to provide conservative measurement procedures peak spatial-average specific absorption rate (SAR) mobile phone. This means that evaluated SAR in anthropomorphic mannequin (SAM) should be higher than heads significant majority users under normal operational conditions. In this paper, conservativeness SAM is investigated by numerically comparing with those four anatomical models at different...
This paper aims to implement average head models of Korean males and investigate age-related differences in the brain for exposure from radiation mobile phones. Four male composed a total 69 structures were developed through statistical investigation anatomical morphology age groups 6, 9, 15 20–24 years age, which are named KR-6, KR-9, KR-15, KR-22 herein. Three numerical bar phone with dual-band built-in antenna applied calculate specific absorption rate (SAR) brain; body lengths Mavg Mlong...
Wireless phones (both mobile and cordless) emit not only radiofrequency (RF) electromagnetic fields (EMF) but also extremely low frequency (ELF) magnetic fields, both of which should be considered in epidemiological studies the possible adverse health effects use such devices. This paper describes a unique algorithm, developed for multinational case-control MOBI-Kids study, that estimates cumulative specific energy (CSE) induced current density (CICD) brain from RF ELF respectively, each...
This paper describes an implementation method and the results of numerical mobile phone models representing real that have been released on Korean market since 2002. The aim is to estimate electromagnetic absorption in human brain for case-control studies investigate health risks related use. Specific rate (SAR) compliance test reports about commercial were collected classified terms elements such as external body shape, antenna, frequency band. design criteria a model each type group are...
Four head models with the outer shapes of different ages were established using specific anthropomorphic mannequin (SAM) model IEEE Standard 1528. The criteria height, face length, and breadth by age applied to build models. We assumed that shells all have same dielectric properties head-equivalent tissue in order simulate a real pressed ear. cheek tilt positions three bar-type phone used, positioning processes against each described detail. Antenna input impedances phones under test...
The specific absorption rates (SARs) in 7-year-old Korean, and 5- 9-year-old European child head models were evaluated compared with those of the anthropomorphic mannequin (SAM) phantom for mobile phone exposure at 835 1900 MHz. Compression pinnae was also considered during evaluation. cheek tilt positions occurring when earpiece is placed ear entrance canal (EEC) analyzed against same reference point (ERP). SAR variations investigated different skin fat properties, as well internal muscle...
Abstract Although radio frequency (RF) electromagnetic fields emitted by mobile phones have received much attention, relatively little is known about the extremely low (ELF) magnetic phones. This paper summarises ELF flux density measurements on global system for communications (GSM) phones, conducted as part of MOBI‐KIDS epidemiological study. The main challenge to identify a small number generic phone models that can be used classify exposure different reported in Two‐dimensional were...
Compliance of the ICNIRP reference and IEEE action levels with basic restrictions on whole-body average (WBA) SAR was investigated based age, physique, posture under isolated grounded conditions. First, Korean male models 1, 3, 5, 7, 20 years age body sizes in 50th percentile were developed used as test subjects: 1y(50th), 3y(50th), 5y(50th), 7y(50th), 20y(50th). The effects age-dependent dielectric properties due to water content tissue WBA analysed, showed that changes are marginal. At...
The anatomical structures in most phantoms are classified according to tissue properties rather than their detailed structures, because the properties, not what is considered important. However, if a phantom does have will be unreliable different tissues can regarded as same. Thus, we produced Visible Korean (VK) -phantoms with (male, 583 structures; female, 459 structures) based on segmented images of whole male body (interval, 1.0 mm; pixel size, mm2) and female mm2), using house-developed...
Increased use of mobile phones raises concerns about the health risks electromagnetic radiation. Phantom heads are routinely used for radiofrequency dosimetry simulations, and purpose this study was to construct averaged phantom children young adults. Using magnetic resonance images (MRI), sectioned cadaver images, a hybrid approach, we initially built template phantoms representing 6-, 9-, 12-, 15-year-old Our subsequent approach revised using 29 items that were identified by averaging MRI...
Exposure to a radiofrequency (RF) signal at specific absorption rate (SAR) of 4 W/kg can increase the body temperature by more than 1 °C. In this study, we investigated effect anesthesia on rats after exposure an RF electromagnetic field SAR. We also evaluated influence mass rats' temperature. Rats weighing 225 and 339 g were divided into sham- RF-exposure groups. Each resulting four groups was subdivided anesthetized non-anesthetized The free-moving in subjected 915 MHz identification...
For being adaptable to the irregular shape of a biological model and for not underestimating spatial-peak mass-averaged specific absorption rates (SARs) hand-held wireless telephones, method taking contiguous tissue volume SAR-averaging-mass is proposed. The proposed obtain SAR averaging by summing node massed layers enclosing point in which averaged wanted body until summed mass closest required mass. Therefore, at skin layer region around sinuses such as nasal cavities, can follow closely...
In recent decades, applications of single photon emission computed tomography and positron in clinical neuroimaging have markedly increased. this study, we developed a series Korean computational head phantoms with detailed cranial substructures for 6-, 9-, 12- 15-year-old children adult by non-uniformly adjusting template phantom to match the standard dimensions. The were coupled Monte Carlo transport code calculate age-dependent specific absorbed fraction (SAF) combination 10 source target...
The aim of this paper is to present the measurement results transmitted (Tx) power levels mobile phones in currently operating wireless communication networks Seoul 2015 and 2017 calculation specific absorption rate (SAR) brain for voice calls while holding a phone against user's ear when at measured mean level. Tx using Code Division Multiple Access (CDMA) 2000, Wide CDMA (WCDMA), Long-Term Evolution (LTE) were compared three main network operators South Korea. actual level was less than...