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강자성체와 도체 차폐재를 이용한 구각(Spherical Shell) 구조의 자기장 차폐율 분석
임윤석,이승우,안호성,변진규 한국자기학회 2023 韓國磁氣學會誌 Vol.33 No.5
In this paper, the magnetic field shielding effect of both the flux shunting shielding by ferromagnetic materials and the induced current shielding by conductors are analyzed for a spherical shell structure in the low frequency range. The shielding ratio equations are derived theoretically from Maxwell’s equations and the results are compared with the ones from electromagnetic field simulations. For the shell layer and materials, a single-layer shell of ferromagnetic material, a single-layer shell of conductor, and a double-layer shell of ferromagnetic material and conductor are considered. For the double-layer shell, a model with an inner conductor layer and one with an outer conductor layer are analyzed separately. Also, material properties and layer thickness requirements are presented that are needed for the specific shielding effectiveness.
말더듬 치료의 전문성 확보를 위한 언어재활사의 자격급수와 경력에 따른 말더듬 치료 인식에 대한 기초 연구
임윤석,안종복 한국언어치료학회 2016 言語治療硏究 Vol.25 No.2
Purpose: This study aimed to measure speech-language pathologists' (SLP) awareness of stuttering therapy and to propose fundamental data collection for the national SLP certification system to ensure professionalism since the legislation of August 2012. In detail, this study examined if there was a difference in the awareness of stuttering therapy efficacy; stuttering therapy support systems; clinical practice of university and center activities by their eligibility type; career of the speech language pathologist; and the stuttering therapy. Methods: Awareness was studied through a questionnaire targeted at 261 SLPs working in 43 language treatment centers in Gyeongsang-do, including Busan and Daegu. The questionnaire consisted of a total of 16 questions divided into four sub-categories: four questions on the effectiveness of stuttering, four questions on stuttering therapy support systems, three questions on the clinical practices of universities, and five questions on center activities. Results: A significant difference was shown in the awareness of stuttering therapy, including stuttering therapy efficacy, stuttering therapy support systems, clinical practices of universities, and center activities depending on eligibility type. Second, a significant difference was shown in the awareness of stuttering treatment depending on the type of SLP license. Third, a significant difference was shown in the awareness of stuttering treatment depending on the career of the SLP. Lastly, a significant difference was shown in the awareness of stuttering treatment depending on the career of stuttering therapy. Conclusions: It may be concluded that there could be differences in the awareness of stuttering treatment depending on individual variables of SLPs. 목적: 본 연구는 2012년 8월 언어재활사 국가자격제도가 법제화된 이래 언어재활사의 말더듬 치료 전문성을 확립하기 위한 기초적 자료 수집을 목적으로 말더듬 치료에 대한 언어재활사들의 인식을 알아보고자 하였다. 이를 위해 언어재활사의 개별 변인을 자격급수, 언어치료 경력 및 말더듬 치료 경력으로 나누어 말더듬 치료효능감, 말더듬 치료 지원체제, 대학에서 임상실습 그리고 소속기관 활동에 대한 인식을 조사하였다. 방법: 본 연구는 부산, 대구를 포함한 경상도 지역의 언어치료 관련 43개 기관에 근무하고 있는 언어재활사 261명(남 13명, 여 248명)을 대상으로 설문지를 통해 말더듬 치료에 대한 인식을 알아보았다. 설문지는 총 16개의 문항으로, 말더듬 치료에 대한 인식을 알아보기 적합하도록 네 가지 하위범주, 즉 말더듬 치료 효능감 4문항, 말더듬 치료 지원체제 4문항, 학교에서 임상실습 3문항 그리고 소속기관 활동 5문항으로 구성되었다. 결과: 첫째, 언어재활사의 자격급수에 따라 말더듬 치료(말더듬 치료 효능감, 말더듬 치료 지원체제, 대학에서 임상실습, 소속기관 활동)에 대한 인식에 유의한 차이가 나타났다. 둘째, 언어재활사의 언어치료 경력에 따라 말더듬 치료(네 가지 모두)에 대한 인식에 유의한 차이가 나타났다. 셋째, 언어재활사의 말더듬 치료 경력에 따라 말더듬 치료(말더듬 치료 효능감, 말더듬 치료 지원체제)에 대한 인식에 유의한 차이가 나타났다. 결론: 이러한 결과들을 종합적으로 고려해 보면, 언어재활사는 자격급수, 언어치료 경력 등과 같은 몇몇 개별 변인에 따라 말더듬 치료에 대한 인식에 차이가 있다는 결론을 내릴 수 있다.
임윤석(Yunseog Lim) 한국조명·전기설비학회 2010 한국조명·전기설비학회 학술대회논문집 Vol.2010 No.9월
Long term site pollution severity (SPS) determination based on the ESDD and NSDD measurement has been applied real scale 765㎸ test line. Three different kinds of insulator strings are installed to obtain each ESDD and NSDD data top, middle and bottom arms, A few historical environmental data such as temperature, precipitation and humidity are offered for reference. As a result, SPS data are summarized for the site application.
22.9㎸ NGR 상용주파 자계발생장치 구축 및 모의 해석
임윤석(Yun-Seog Lim),이상윤(Sang-Yun Lee),서인진(In-Jin Seo) 한국조명·전기설비학회 2010 한국조명·전기설비학회 학술대회논문집 Vol.2010 No.9월
The 22.9㎸ neutral ground reactor(NGR) which is connected the secondary neutral line of 154㎸ main transformer is used for protecting electric facilities and security of life. This paper presents installation of 22.9㎸ NGR magnetic field generator and comparable result between magnetic field measurement and simulation in order to reduce magnetic field around NGR effectively.
임윤석(Yun-Sok Lim),이상윤(Sang-Yun Lee),이동일(Dong-Il Lee),서인진(In-Jin Seo) 한국조명·전기설비학회 2010 한국조명·전기설비학회 학술대회논문집 Vol.2010 No.9월
Electric and Magnetic Field caused by transmission line are limited to prevent giving human body any effect by related standards. However, when road, building and bridge are newly built near the transmission line, electric and magnetic field over the standards are generated. In this study, highway noise barrier was applied to reduce electric field of a road installed near the transmission line. To select the most appropriate model of the barrier, we corrected errors between measurement and simulation results and simulated several structures of barrier.
임윤석(Yunseog Lim) 한국조명·전기설비학회 2010 한국조명·전기설비학회 학술대회논문집 Vol.2010 No.9월
This paper gives a hydrophobicity test results of 765㎸ polymer insulators in a polluted area. All the experiments is conducted in the KEPCO's PT center in Gochang which is located near west sea side. Hydrophobicity test was conducted with spray method in accordance with IEC TS62073 which is very simple but well organized test method. The test results show that the hydrophobicity level is affected by surrounding environmental properties and applied electric field.