경골 근위부에 발생한 거대세포형 골육종 - 증례 보고 -

김정렬,장규윤,이상용,손경락,Kim, Jung-Ryul,Jang, Kyu-Yun,Lee, Sang-Yong,Sohn, Kyung-Rak 대한근골격종양학회 2006 대한골관절종양학회지 Vol.12 No.2

거대세포형 골육종은 드문 종양으로 거대세포종과의 구분이 어렵다. 이들 종양은 발생 부위 및 방사선학적 소견이 동일하다. 또한 이들 종양의 조직학적 소견도 구분이 어렵다. 이들 두 종양의 서로 다른 예후와 치료 방법 때문에 처음 진단시 반드시 정확한 진단을 내려야 한다. 본 논문은 처음 진단 당시 침생검에 의해 거대세포종으로 진단되었던 경골 근위부의 거대세포형 골육종의 증례를 보고하는 바이다. Giant cell-rich osteosarcoma is a rare tumor that is hard to distinguish from giant cell tumors of bone. The location and radiographic aspect of these tumors can be identical. The histologic differentiation between a giant cell-rich osteosarcoma and a giant cell tumor can be difficult. Due to the different prognosis and treatment strategies of these tumors it is essential to make the right diagnosis at presentation. This article reports a case of a giant cell-rich osteosarcoma of the proximal tibia that initially was diagnosed histologically as a giant cell tumor by needle biopsy.

환변동보험의 중소중견기업수출 지원효과 분석

김정렬 한국무역보험학회 2019 무역금융보험연구 Vol.20 No.4

본 연구는 환변동보험지원이 국내 중소중견기업의 수출 증대에 미치는 영향을 분석하였다. 다중회귀분석 및 벡터오차수정모형(VECM) 분석 방법을 통해 환변동보험의 수출 지원효과를 살펴보았다. 관련변수로는 중소기업수출액, 중소기업대상 환변동보험인수액. 환율의 변동성, 수출가격지수, 산업생산지수 등의 변수를 이용하였다. 다중회귀분석 추정 결과, 환변동보험인수액의 증대, 산업생산의 증가와 수출가격의 상승은 중소중견기업의 수출을 증가시키는 것으로 나타났다. VECM분석에서의 충격반응함수와 예측오차분산분해분석에 따르면 환변동보험인수액은 수출 증대에 긍정적으로 영향을 주는 것으로 나타났다. 환율변동성의 확대는 수출의 감소를 가져오고, 수출가격의 상승 및 산업생산의 증가는 수출의 증가를 가져오는 것으로 나타났다. 환변동보험지원은 환율변동성에 의한 수출 감소의 영향을 완화시킴으로서 중소중견기업의 수출증대에 기여함을 알 수 있다. This research analyzes the effect of foreign exchange risk insurance on export expansion among Small & Medium Sized Enterprises(SMEs) in South Korea. Multiple Linear Ordinary Least Squares(OLS) and Vector Error Correction Model(VECM) is selected as methods for analysis. And as related variables, SMEs’ export volume, exchange rate risk insurance purchase for SMEs, exchange rate volatility, export price index, index of industrial product is selected. The OLS results show that, an increase in foreign exchange risk insurance purchase amount, an increase in industrial production, and an increase in export price contribute to increase in export of SMEs. Meanwhile in the VECM results, according to the impulse response function and variance decomposition of forecast error, foreign exchange risk insurance purchase amount have a positive impact on export of SMEs. However, an increase in exchange rate volatility have a negative impact on export of SMEs while an increase in export price and an increase in industrial production have a positive impact. The results implies that the foreign exchange risk insurance mitigates the exchange rate risk for SMEs and contributes to their export growth.

폐의 전이성 선암종과 동반된 점액성 색전 - 1예 보고 -

김정렬,김광일,박성환,이응석,김한겸 대한병리학회 1999 Journal of Pathology and Translational Medicine Vol.33 No.6

유니버셜 조인트에 의해 구동되는 회전축의 횡진동과 비틀림진동의 연성진동

김정렬,전승환,이돈출 한국소음진동공학회 1999 소음 진동 Vol.9 No.3

This paper presents theoretical analyses for unstable vibrations caused by the couple of bending and torsion in a rotating shaft driven through a universal joint. A driving shaft is assumed to be rigid and to rotate with a constant angular velocity. The driven shaft system consists of a flexible shaft with a circular section and a symmetrical rotor attached at a point between the shaft ends. Equations of motion derived hold with an accuracy of the second order of shaft deformations, and are analyzed by the asymptotic method. The vibrations become unstable when the driving shaft rotates with the angular velocity to be approximately equal to half of the sum of the natural frequencies for whirling and torsional vibrations.

신공공관리적 행정개혁의 도입과 레드테이프의 수준 변화

김정렬,안병철,서상원,한인섭 한국정부학회 2006 한국행정논집 Vol.17 No.3

A comparative analysis of teacher talk in solo and team teaching

김정렬,Bryan Stoakley 경희대학교 언어정보연구소 2016 언어연구 Vol.33 No.S

Despite the benefits of team teaching, it poses significant challenges to the role of local English teachers. Teacher roles, one of such challenges by investigating interactive teacher talk comparing team teaching against solo baseline teaching of the English program in Korea (EPIK) was investigated via this paper. More specifically, instructional language (Korean/English), question types, instructional registers (regulative/ instructional/feedback), and interactive feedback was addressed. The method employed was sampling three sets of team teaching and solo teaching of the same language skills and lessons using the same English textbook in the same area of elementary schools for an appropriate comparison. Their entire teacher talks of the lessons were recorded and transcribed. The transcription of two sets of data was compared by different categories of teacher talk. The analysis results show that native English assistant teachers (NEATs) are more alike to solo Korean teachers of English while Korean teachers of English in team teaching play assisting and mediating roles between NEATs and students. The currently observed role change between NEATs and Korean teachers requires serious attention since the national curriculum is designed for Korean teachers of English to play major roles in teaching English classes.

DMPO 와 ㆍOH 의 Spin添加生成物에 대한 EPR 分析 및 ㆍOH 의 毒性作用

김정렬,이미녕,박윤창 성균관대학교 기초과학연구소 1989 論文集 Vol.40 No.2

The hydroxyl radical (·OH) generated from the Iron-catalyzed Haber-Weiss reaction was detected. The ability of Fe(Ⅱ) to this reaction depends upon the particular ligands around the metal ion. The formation of hydroxyl radical, spin trapped with 5, 5-dimethyl-1-pyrroline-N-oxide (DMPO), increased with the amount of ATP added in the Fe (Ⅱ)-H_2O_2 system. Specially, when the concentration of H_2O_2 was high, the perhydroxyl radicals were formed from the system. Human erythrocyte ghosts were covalently labeled with 4-maleimido-2,2,6,6-tetramethylpiperidine-N-oxyl(4-Maleimido-Tempo) and their electron paramagnetic resonance(EPR) spectra revealed two major binding environments representing strongly (h_1) and weakly (h_2) immobilized) species. The ratio of h_2/h_1, determined from the respective peak amplitudes, decreased from 14.8 to 5.5 when the labeled ghosts were exposured with hydroxyl radicals produced in the system, whereas lipid peroxidation of erythrocyte ghosts was increased with the concentration of hydroxyl radicals. These effects suggested that the fluidity of membrane and/or protein mobility were decreased as a result of lipid peroxidation and the structural and the functional alterations of membrane were. initiated by hydroxyl radicals.

초중등 영어교육 연계성 문제: 영어교과서의 계열성을 중심으로

김정렬 서울대학교 언어교육원 2014 語學硏究 Vol.50 No.1

The purpose of this study was to examine the sequence of linguistic features for English textbooks, using Coh-Metrix, an automated web-based tool. To analyze fourth to seventh grade textbooks, a corpus of written text were built from fifteen textbooks. To identify the sequence, textbooks were compared under three different categories: Word, Sentence and Discourse Cohesion. Word category measured basic counts, lexical diversity and word information. Sentence category measured basic counts, syntactic complexity and readability. Discourse cohesion category measured referential cohesion, semantic cohesion and pronoun information. The results are as follows: First, in terms of words, the basic count, lexical diversity and word information were relatively well constructed sequentially. However, the meaning of words did not show the expected sequence well. Second, in terms of sentence, basic counts, syntactic complexity and readability measures were sequentially graded from easy to difficult as the year of school advanced. However, the increase of sentence count and readability measures showed large gap between grades. Finally, all pronoun incidence measure was relatively well established. Referential cohesion, semantic cohesion and personal pronoun did not show significant difference between grades.

A Diachronic Look at the English Education in North Korea

김정렬 미래영어영문학회 2019 미래영어영문학회 학술대회 자료집 Vol.2019 No.11

제7차 교육과정과 초등 영어 교과서 개발 방향

김정렬 한국외국어교육학회 1998 Foreign languages education Vol.5 No.1