COVID-19의 영향으로 인한 공업계 특성화 고등학교의 방과후학교 운영 실태 분석

정현용 한국방과후학교학회 2021 방과후학교연구 Vol.8 No.1

이 연구는 공업계 특성화 고등학교의 2018년~2020년 사이 방과후학교 운영실태를 분석하여 방과후학교의 주요 현황, 운영 성과, 문제점 등의 실태를 분석하고자 한다. 그리고 2020년은 COVID-19의 영향으로 많은 공업계 특성화 고등학교에서 방과후학교가 운영되지 못했는데, 이에 대한 대안을 제시하는 데 목적이 있다. 연구를 위하여 2018년~2020년 학교알리미 공개용 데이터 분석, 선행연구, 방과후학교 운영 길라잡이 등의 문헌분석을 하였다. 공업계 특성화 고등학교의 방과후학교는 초･중･일반고의 방과후학교처럼 교과, 특기･적성 프로그램 외에 직업교육, 자격증 프로그램 등이 더 있다. COVID-19의 영향으로 2019년 대비 운영된 프로그램 수는 43.9%, 방과후학교 참여 학생 수는 37.9% 수준으로 운영되었다. 공업계 특성화 고등학교의 방과후학교는 COVID-19가 단기간에 종식되지 않으리라고 예측되어 기존의 대면 방식보다 비대면 방식의 프로그램 개발과 보급의 필요성이 더욱 커지고 있다. This study intends to analyze the actual operational conditions including main situation, performance and problems of after-school programs of technical specialized high school between 2018 and 2020. It, also, aims to provide an alternative as many technical specialized high schools failed to operate after-school programs due to COVID-19 in 2020. For this study, the analysis on public data of school notification from 2018 to 2020, prior research and the literature analysis on the operation guidelines for after-school program were conducted. The after-school program of technical specialized high school includes vocational education and certificate program in addition to subjects and specialty & aptitude program in the after-school programs of elementary, middle and general high school. Under the influence of COVID-19, the number of after-school programs operated was about 43.9% and that of students who took part in the programs was about 39.9% compared to 2019. The necessity of developing and deploying non-face-to-face approach of after-school program of technical specialized high school is growing more than conventional face-to-face one as COVID-19 would not be expected to come to an end in a short period.

역류성 식도질환

정현용,Jeong, Hyun-Yong 한국생명보험의학회 1997 保險醫學會誌 Vol.16 No.-

평균수직응력에 민감한 모재를 가진 기공체의 구성식과 기공생성모델

정현용,Jeong, Hyeon-Yong 대한기계학회 2000 대한기계학회논문집 Vol.24 No.2

A macroscopic yield criterion for porous solids with pressure-sensitive matrices modeled by Coulomb's yield criterion was obtained by generalizing Gurson's yield criterion with consideration of the hydrostatic yield stresses for a spherical thick-walled shell and by fitting the finite element results of a voided cube. The macroscopic yield criterion is valid for negative mean normal stresses as well as for positive mean normal stresses. From the yield criterion, a plastic potential function for the porous solids was derived either for plastic normality flow or for plastic non-normality flow of pressure- sensitive matrices. In addition, the elastic relation, an evolution equation of the plastic flow stress of the matrices and an evolution equation of the void volume fraction were presented to complete a set of constitutive relations. The set of constitutive relations was implemented into a finite element code ABAQUS to analyze the material behavior of rubber-toughened epoxies. The cavitation and the deformation behavior were analyzed around a crack tip under three-point bending and around notch tips under four-point bending. In the numerical analyses, the cavitation of rubber particles was considered via a stress-controlled nucleation model. The numerical results indicate that a reasonable cavitation zone can be obtained with void nucleation controlled by the macroscopic mean normal stress, and a plastic zone is smaller around a notch tip under compression than under tension. These numerical results agree well with corresponding experimental results on the cavitation and plastic zones.

Under-Damped 전치 증폭기를 이용한 10-Gb/s CMOS 집적 광 수신기

정현용,이정민,최우영 한국과학기술원 반도체설계교육센터 2015 IDEC Journal of Integrated Circuits and Systems Vol.1 No.1

본 논문에서는 65 nm CMOS 공정을 사용하여 under-damped 전치 증폭기와 CMOS 아발란치 광 검출기를 포함한 CMOS 집적 광 수신기를 구현하였다. Under-damped 전치 증폭기는 이전 발표된 기법에 비해 CMOS 아발란치 광 검출기의 제한된 속도를 보상하면서도 더욱 낮은 파워와 나은 민감도를 제공한다. 구현된 광 수신기를 통해 –6 과 –6.5 dBm의 광 파워에서 10-12 이하의 비트 에러율 성능을 만족시키녀 10 Gb/s 231-1 와 27-1 PRBS 데이터 광 신호를 성공적으로 전송하였다. 제작된 광 수신기는 0.24 × 0.1 mm2 의 칩 크기를 가지며 출력 버퍼를 제외하고 1.2 V 전원에서 13.7 mW 의 전력을 소모한다.

급성 B 형간염 진단에서 IgM anti-HBc 측정의 의의

정현용,김영건,노흥규,이복희,김연길,장병환 대한내과학회 1986 대한내과학회지 Vol.30 No.3

The following results and conclusions were reached by measuring IgM anti-HBc through radioimmunoassy in the 28 patients with acute viral hepatitis(including the 26 patients with acute viral hepatitis B), the 22 chronic HBsAg carriers, the 12 healthy HBsAg carriers, and the 21 healthy persons. 1) By means of the initial and follow-up test of 26 patients with acute viral hepatitis B, the test of total 51 samples ahowed that the 41 samples(80.4%) among them proved to positive (S/N ratio$gt;2.1), and the S/N ratio of them as 5.7±3.3(M±SD) were statically-significantly higher(p.$lt;0.001) than that of other groups of patients, making the differential diagnosis of the diseases possible. 2) In the course of the follow-up test of acute virul hepatitis B, the test was proved to be positive at the rate of 100% within a week, 86.7% around 30 days and 71.0% around 60 days after onset of clinical symptoms, being reduced to 51.0% till 180 days, whereas their S/N ratio proved to be 9.3±1.3 within a week, 6.8±2.3 around 30 dayd 2.7±0.9 raound 60 days, showing rapidly reduced till 2 months. 3) Among the 26 patients diagnosed to be with acute viral hepatitis B, the initial test showed the 5 patients with negative HBsAg, all of whom proved to be with positive IgM anti-HBc and the S/N ratio of whom show the similar figure to the other patients with positive HBsAg. Therefore, acute viral hepatitis B with negative HBsAg could be diagnosed through measureing IgM anti-HBc. 4) Both of the 2 diagnosed not to be with acute viral hepatitis B among the 28 patients with acute viral hepatitis, ahowed poaitive IgM snti-HAV, diagnosed to be acute viral hepatitis A. 5) In the diagosis of acute viral hepatitis B, the sensitivity of IgM anti-HBc showed 80.4% till 180 days, but 100% within a week-test and 93,3% till a month, after the onset of symptoms, its specifity being 85.5%.

기공생성모델 ( Void Nucleation Models )

정현용 대한기계학회 1999 대한기계학회 춘추학술대회 Vol.- No.-

새기르기의 실태 -청홍조

정현용 대한양계협회 1974 월간 양계 Vol.6 No.4

소화성 궤양 환자에 대한Lansoprazole의 치료 효과

정현용,김진희 최신의학사 1997 最新醫學 Vol.40 No.6

[특집/자동차 안전] 전방 에어백과 관련 법규

정현용 한국자동차공학회 2000 오토저널 Vol.22 No.2

국내 대형 건설회사의 안전관리 수준 향상방안

정현용,신원상,손창백 대한건축학회 2023 대한건축학회논문집 Vol.39 No.3

This study was conducted to identify the current safety management level of large domestic construction companies, compare it with pastsafety levels, and present improvement plans for areas that need future development. As a result, it was found that the current head officeand site safety management level of large domestic construction companies improved compared to the past, and the safety management levelof the head office improved somewhat more than the site. In addition, the safety management level of each group was maintained at a goodlevel in large domestic construction companies. However, the safety management level of group two was still relatively low compared togroup one, and the difference in these levels between groups still existed. The safety management level improvement plan was analyzed andsuggested for each group of large domestic construction companies. 본 연구는 국내 대형 건설회사를 대상으로 현재의 안전관리수준을 파악하여 과거의 안전수준과 비교하고, 향후 향상이 필요한 부분에 대한 개선방안을 제시하고자 수행되었다. 연구결과, 국내 대형 건설회사의 현재 본사와 현장의 안전관리수준은 과거에 비해 향상되었고, 본사의 안전관리수준이 현장보다 다소 더 많이 향상된 것으로 나타났다. 그리고, 국내 대형 건설회사의 그룹별 안전관리수준은 모두 양호한 수준을 유지하고 있었다. 그러나, 2그룹의 안전관리수준은 아직까지 1그룹에 비해 상대적으로 낮은 수준으로 그룹간의 안전관리수준 차이는 여전히 존재하였다. 국내 대형 건설회사의 각 그룹별로 안전관리수준 향상방안을 분석하고 이를 종합하여 국내 대형 건설회사의 안전관리수준 향상방안을 제안하였다.