60 Hz 고압송전선로 인접 주거지역의 자기장 노출수준 평가

홍승철,정준식,김근영,박현주,최성호,Hong, Seung-Cheol,Jung, Joon-Sig,Kim, Keun-Young,Park, Hyun-Ju,Choi, Sung-Ho 한국환경보건학회 2008 한국환경보건학회지 Vol.34 No.1

In order to evaluate the magnetic field (MF) exposure level in residential areas near high voltage power lines, this research measured MF levels at 120 sites near high voltage transmission lines in the Busan region, Gwangju region, Daegu region and Changwon region from July to December, 2005, and compared and analyzed the efficiencies by measuring and applying the MF emission levels of underground cables and high voltage transmission lines. As a result of the investigation of the MF exposure level by the building usage, the average MF level of 17 locations at schools was $2.44{\pm}2.45mG;$ that of 10 locations at hospitals $6.21{\pm}12.39mG;$that of 76 locations at apartments $2.55{\pm}2.98mG;$ and that at kindergartens and infant houses $3.32{\pm}4.21mG$. MF exposure was analysed as a function of distance from the source and the MF levels directly below a source were $5.15{\pm}8.72mG$, those within 30 m were $3.10{\pm}3.32mG$, while those within 50 m were $2.45{\pm}2.38mG$, and within 100 m were $0.71{\pm}0.93mG$. In order to determine the difference of MF levels by the actual distance from high voltage transmission line within the same building, the evaluation of the floor position and the MF level has shown that the MF levels were highest in the order of roof, 4th floor, 3rd floor, 2nd floor and 1st floor. Comparison of MF emission intensity of underground cables and high voltage transmission lines, has shown that underground cables have an 86-94% of reduction ratio in MF compared to high voltage transmission lines, thus demonstrating higher efficiency.

오령산 투여 및 침치료 후 당뇨병성 신증의 혈청 크레아티닌 수치가 호전된 뇌경색 환자 증례보고

홍승철,박송원,이찬솔,노현석,하유경,최동준,Hong, Seung-Cheol,Park, Song-Won,Yi, Chansol,Noh, Hyeonseok,Ha, You-Kyung,Choi, Dong-Jun 대한중풍순환신경학회 2017 대한중풍.순환신경학회지 Vol.18 No.1

■ Objectives This case is to report the effect of Oryeong-san and acupuncture therapy on serum creatinine level of a cerebral infarction patient with diabetic nephropathy. ■ Methods A female Korean patient was treated with Oryeong-san, acupuncture for total 32 days. We observed renal function test, input/output balance, body weight, hand and foot circumferences, and other symptoms like edema, urination, and any adverse event. ■ Results After treatment, serum creatinine level was improved to 2.48mg/dL from 3.45mg/dL at admission, and foot circumference was decreased to 18.5~18.9cm from 22.0~22.5cm without any adverse event. However, we couldn't find any significant differences on input/output balance, body weight, or symptoms of urination. ■ Conclusion This case suggests that Oryeong-san and acupuncture therapy could be effective in improving serum creatinine clearance of cerebral infarction patient with diabetic nephropathy.

PC 이용공간에서 VDT 특성에 따른 자기장 노출 평가

홍승철(Seung-cheol Hong),정준식(Joon-Sig Jung),김근영(Keun-Young Kim),박현주(Hyun-Ju Park),최성호(Sung-Ho Choi) 한국실내환경학회 2007 한국실내환경학회지 Vol.4 No.1

To investigate characterization of EMF(Electromagnetic Field) emission from VDT(Visual Display Terminal) in computer room, we were divided into 3 types of placement monitors which are 1) back side of monitor faced the ground(back view type), 2) arrangement of monitors was a line type(two sides type), and 3) disposition of monitors was s straight(horizontal line type). We also measured monitors classified types at the front, side and back by distance and evaluated by TCO(The Swedish Confederation of profession Employers) and MPR-2(Measure and Proof Radiation Board) guide line. Magnetic field emission level by the type of VDT, it was indicated that MF(Magnetic Field) level was below the backgrounds level when CRT moved away about 70~90㎝, LCD moved away about 40~50㎝. We evaluated MF emission level by the number of VDT, it did not show any relationship. Finally, estimated MF emission level by the placement of VDT, it was showed the MF level less than the background level, when VDT moved away 40~50㎝ in all dispositions with exception of 2 sites. Background level of case was higher than emitted from VDT, so that did not effect on MF level by distance. However, we find out that as distance increased, MF emission level decreased significantly in all cases. We measured MF emission level of one monitor and others (back and forth) monitor in line type. Below the background level when one monitor type moved away 70㎝, others monitor type moved away 40㎝. However, other monitor types affected MF level which is located back monitor. The data demonstrate that avoiding excessive MF exposure from VDT using computer room, to have a space between user and VDT at least 50㎝.

연구논문 : 60Hz 고압 송전선로의 자기장 발생범위에 대한 GIS 적용 방안에 대한 연구

홍승철 ( Seung Cheol Hong ),최성호 ( Seong Ho Choi ),김윤신 ( Yoon Shin Kim ),박재영 ( Jae Young Park ) 한국환경영향평가학회 2006 환경영향평가 Vol.15 No.4

DITI로 관찰한 Bell`s palsy에 미치는 수기요법의 영향에 관한 임상적 연구

홍승철(Seung Cheol Hong),안훈모(Hun Mo Ahn),이재흥(Jae Heung Lee),하정아(Jeong-A Ha) 대한의료기공학회 2015 醫療氣功 Vol.15 No.1

Objective : The purpose of this study is to investigate the effect of Su-Gi therapy for Bell`s palsy by using DITI. Methods : We investigated 16 patients with Bell’s palsy who had visited in the H Korean medicine hospital in Gyeonggi Province from December 27th, 2010 to April 8th, 2015. The Su-Gi therapy was done by 1 times daily. We evaluated the change of them by using Digital Infrared Thermographic Imaging and Yanagihara's unweighted grading system Results : There aren't meaningful differences in values for the meridian points in pretest and posttest which were observed by DITI of abnormal side and normal side. There are meaningful differences in values, for abnormal side and normal side of the meridian points in pretest and posttest of DITI. It was of significance that pretest Y and average ΔT of each the meridian points in the type of hyperthermia but not in the type of hypothermia. In the Correlation analysis of values of pretest and posttest, chaotic aspects of body heat distribution in the pretest change as a relatively consistent aspects in the posttest. It wasn't of significance that Correlation Analysis of Ups and downs in temperature of TE17 and Recovery speed observed by ΔY. In simple regression analysis of posttest’s Y-system values against absolute ΔT by subtracting ΔTE17 from ΔST6, we didn't predict in the pretest, but could predict significantly in the posttest(Regression coefficient : –2.11) In the regression analysis result of the meridian points` pretest ΔT posttest ΔT , 陽白(GB14) and 頰車(ST6) are of significance (Total R-Square=0.447). But we couldn't obtain final regression analysis model. Conclusions: These results suggest that Su-Gi therapy may be effective for Bell`s palsy.

실내 주거환경에서 주부를 대상으로 한 극저주파 자기장 노출수준 평가

홍승철(Seung-Cheol Hong)⋅한명덕(Seung-Cheol Hong)⋅김근영(Keun-Young Kim)⋅김윤신(Yoon Shin Kim) 한국실내환경학회 2009 한국실내환경학회지 Vol.6 No.1

The objective of this study was to evaluate Extremely Low Frequency Magnetic Fields (ELF-MFs) exposure level of housewives and the relation of residential environments with ELF-MFs exposure level in home. ELF-MFs measurements were performed for 58 housewives include 31 working women. Twenty-four hours personal MF exposure levels of housewives were slightly higher than working women as an arithmetic mean. However the median of 24 hours personal exposure levels for working women were significantly higher than housewives (p<0.05). The median of personal exposure levels due to the activity at home, working women were higher than housewives significantly (p<0.05). As a results of correlation of residential environments, such as their living environments, total income, type of water supply pipes, and distance from power line with ELF-MFs exposure level in home was different from the type of residence (p<0.05). This study could be informed as guidance for ELF-MFs exposure analysis in residential environment.

도심지역 노인복지시설 실내 환경에 대한 RF 전자파 노출량의 정성.정량 평가에 관한 연구

최정훈,김남,홍승철,김윤신,최성호,Choi, Jung-Hun,Kim, Nam,Hong, Seung-Cheol,Kim, Yoon-Shin,Choi, Sung-Ho 한국환경보건학회 2006 한국환경보건학회지 Vol.32 No.4

In this study in order to evaluate the growth of RF propagation exposure rate generated according to the enhancement of its use, it is proposed for the ground to be able to examine and to contemplate the correlation between the human health and RF propagation exposure rate by measuring and analyzing the RF exposure source and exposure rate in an indoor environment. As a result of research, it is analyzed that the main exposure source of critically making effect in indoor environment is the frequency hand if radio broadcasting, mobile communication, wireless LAN, digital broadcasting, home appliance, etc., including the TV broadcasting. Among these, it is shown that the TV broadcasting and mobile communication band are the highest. And it is the concluded that RF exposure rate of the environmental sensitive equipment, like an institution for the aged, has lower possibility to exceed the human RF protection criteria by this evaluation.

개인 노출량 조사를 통한 한국인의 극저주파 자기장 노출 수준

정준식,김근영,홍승철,조용성,김윤신,Jung, Joon-Sig,Kim, Keun-Young,Hong, Seung-Cheol,Cho, Yong-Sung,Kim, Yoon-Shin 한국환경보건학회 2012 한국환경보건학회지 Vol.38 No.1

Objectives: The purpose of this study was to estimate the exposure level to extremely low frequency-magnetic fields (ELF-MF) among a selected Korean population using 24-hour personal exposure measurement. Methods: Participants were randomly selected for the measurement of MF exposure under the assumption that the subjects are representative of the overall Korean population. Levels of personal exposure to MF were measured according to the subject's daily activities. Results: The 24-hour time-weighted average (TWA) of 250 participants was $1.56{\pm}4.56$ mG (GM, GSD: 0.79, 2.46 mG). Personal exposure levels for females were higher than for males. The highest personal exposure level was shown in the age group between 20-60 years old. Personal exposure levels according to job category were higher for the non-occupational group than for the occupational group. Conclusions: Our results showed MF exposure exceeding 2 mG per day among 11.3% of the Korean population, indicating a somewhat higher percentage compared to the EMF RAPID Program's results for the U.S population.

직업성 전자장 노출과 백혈병 발생에 관한 메타분석

김윤신,송혜향,홍승철,조용성,Kim, Yoon-Shin,Song, Hae-Hiang,Hong, Seung-Cheol,Cho, Yong-Sung 대한예방의학회 2000 예방의학회지 Vol.33 No.1

Objectives : This study uses meta-analysis methodology to examine the statistical consistency and importance of random variation among results of epidemiologic studies of occupational electromagnetic field exposure and leukemia. Methods : Studies for this meta-analysis were identified from previous reviews and by asking researcher active in this field for recommendations. Overall, 27 studies of occupational electromagnetic field exposures and leukemia were reviewed. A variety of meta-analysis statistical methods have been used to assess combined effects, to identify heterogeneity, and to provide a single summary risk estimate based on a set of simiar epidemiologic studies. In this study, classification of exposure metircs on occupational epidemiologic studies are reported for (1) job classification (20 individual studies); (2) leukemia subtypes (13 individual studies); and (3) country (27 individual studies). Results : Results of this study, an inverse-variance weighted pooling of all the data leads to a small but significant elevation in risk of f 1% (OR=1.11, 95% CI : $1.06\sim1.16$) among 27 occupational epidemiologic studies. Publication bias was assessed by the 'fail-safe n' that may be not influence for all combined results exception a few categories, ie, 'power station operators' and 'electric utility workers' by job classification on occupational study. And ail combined odds ratio results were similar for fixed-effects models and random-effects models, with slightly higher risk estimates for the random-effects model in situations where there was significant heterogeneity, ie, Q-statistic significant (p<.05). Conclusions : We found a small elevation in risk of leukemia, but the ubiquitous nature of exposure to electromagnetic fields from workplace makes even a weak association a public health issue of substantial power to influence the present overall conclusion about relationship between electromagnetic fields exposure and leukemia.

일부 용접공의 극저주파 자계노출평가

정연준 ( Yeon Jun Jeong ),홍승철 ( Seung Cheol Hong ) 한국산업보건학회 2014 한국산업보건학회지 Vol.24 No.4

Objectives: This study was conducted to investigate the patterns of exposure of welders to strong magnetic fields for extendedperiods of time on the basis of their daily activities as recorded in a logbook. Methods: Male workers whose main job is welding, specifically seven welders occupied with gas tungsten arc welding(GTAW), two performing shielded metal arc welding(SMAW), and ten engaged in gas metal arc welding(GMAW), were measured in terms of the degree to which they were exposed to extremely low frequency(ELF) magnetic fields over 24 hours by using an electromagnetic field meter(EMF meter), as well as based on a daily activity log. Results: The welders were exposed to 1.25±4.95 μT of magnetic field per day on average. For those who spent more than half a day-735.26 minutes, or 51.1% of the day-at work, the figure averages 3.88±8.85 μT with a maximum value of 221.28 μT. The subject welders spent 338.14±154.95 minutes per day at home. During their stays at home, they were exposed to an average of 0.17±0.06 μT with a maximum value of 3.50 μT. The maximum exposure of 221.28 μT occurred when welders performed GMAW. The average exposure reached its highest at 17.71±6.96 μT when conducting SMAW. Magnetic field exposure also depends upon posture: welders who sat while welding were exposed five times more than those who stood during work, and this difference is statistically significant. As for the relationship between distance from the welding power supply and maximum magnetic field exposure, maximum magnetic field exposure decreases as the distance increases. The average magnetic field exposure, in the meantime, showed no significant difference depending on distance. Conclusions: The following were observed through this study: 1) welders, while conducting jobs, are exposed to magnetic fields not only from the welding machine, but also from the surrounding base material due to the current flowing between the welding machine and base material, meaning that they are continuously exposed to a magnetic field; and 2) welders are more exposed to magnetic fields while they sit at a job compared to when they stand up.