표면근전도와 적외선체열촬영을 이용한 요통의 평가

이강진,최인성,이소영,한재영,이삼규,채홍재,이성과,문재동 대한산업의학회 2001 대한직업환경의학회지 Vol.13 No.3

목적 : 요통환자에서 요통의 유무와 강도를 평가하고자 표면근전도를 이용하여 근육 활동성의 차이를 검증하였고 적외선체열촬영을 이용하여 제표면 온도의 변화를 측정하였다. 방법 : 요통환자군 16명과 대조군 16명에 대하여 요부에 부착한 표면전극에서 얻은 근전도 신호와 적외선체열촬영 결과를 비교하였다. 교란요인의 영향을 배제하기 위하여 연령과 성별 그리고 비만도에 따라 정상 대조군과 요통환자군을 짝짓기하여 각각 16명씩 선정하였다. 결과 : 정적표면근전도 실시 결과 우측의 경우 중앙값이 요통환자군에서 198.1 ㎶, 정상대조군에서는 161.3 ㎶로 통계적으로 유의한 차이가 있었고(p<0.01), 좌측은 요통환자군에서 194.2 ㎶, 정상대조군에서 180.5 ㎶로 유의한 차이는 없었다. 동적표면근전도 실시 결과 재신전시와 굴곡시 근전위의 비가 우측의 경우 요통환자군에서 중앙값이 1.12였고 정상 대조군은 1.39로서 두 군간에 유의한 차이가 있었고(p=0.027), 좌측의 경우도 요통환자군에서는 1.08이었고 정상 대조군에서는 1.21로 유의한 차이가 있었다(p=0.036). 적외선체열촬영결과 ΔT가 0.5 ℃ 이상의 차이가 있을 때 이상이 있는 것으로 정하면, 요통환자군에서는 16명 모두 이상자로 판정되었고, 정상 대조군에서는 16명중 3명이 이상자로 판정되어 민감도는 100 %, 특이도는 81.3 % 였다. 표면근전도를 이용한 요통의 진단은 민감도가 78.6 %이고 특이도가 72.2 %였으며, 적외선체열촬영은 민감도가 100 %였고 특이도가 87.5 %였다. 결론 : 이러한 결과로 볼 때 표면근전도 검사법과 적외선체열촬영은 요통을 간접적으로 평가하는데 도움이 되는 검사법이며, 적외선체열촬영이 표면근전도검사법에 비하여 보다 정확한 검사법으로 판단된다. Objectives : We studied the efficacy of surface electromyography(SEMG) and digital infrared theimographic imaging (DITI) in the assessment of low back pain both(LBP) Methods : We compared electromygraphic signals from electrodes placed in the lumbar area and the digital theimographic images in 16 LBPpatients and 16 control subjects. The LBP patients and the control subjects were matched for age, gender, and body mass index(BMI) to adjust for any confounding effects Results : In the static analyses of SEMG, median value was 198.1 ㎶ for the controls on the right side, and they were 194.2 ㎶ and 180.5㎶ on left side respectively. There was a statistically significant difference between the two groups on the right side(p<0.01), but not on the left side. In the dynamic analyses of the SEMG, the median values of the extension per flexion ratio of right side were 1.12 for LBP patients and 1.39 for controls. and those on the left side were 1.08 and 1.21 respectively. There were statistically significant differences in both sodes(p<0.05). The sensitivity and specificity were 100% and 81.3% in DITI, 78.6% and 72.2% in SEMG. Conclusions : These results indicate that SEMG and DITI are useful methods for indirect assessments of LBP, and that DITI is more sensitive and specific than SEMG.

Negative Regulation of Hypoxic Responses via Induced Reptin Methylation

Jason S. Lee,김윤호,김익수,김보규,최희준,이지민,신희재,김정화,김지영,서상범,이호,Olivier Binda,Or Gozani,Gregg L. Semenza,김민형,김근일,황대희,백성희 Sookmyung Women's University Research Institute of 2010 여성과 건강 Vol.6 No.1

Negative Regulation of Hypoxic Responses via Induced Reptin Methylation

Jason S. Lee,김윤호,김익수,김보규,최희준,이지민,신희재,김정화,김지영,서상범,이호,Olivier Binda,Or Gozani,Gregg L. Semenza,김민형,김근일,황대희,백성희 Sookmyung Women's University Research Institute of 2010 여성과 건강 Vol.6 No.1

다이어몬드상 탄소 박막의 제작시 수소 가스의 영향

이재성,박진석 漢陽大學校 工學技術硏究所 1996 工學技術論文集 Vol.5 No.1

Diamond-like carbon (DLC) films have been prepared by a widely-used rf(13.56 MHz) plasma-enhanced chemical vapor deposition(PECVD) method using CH4 gas. The hydrogen incorporated in DLC films plays an important role of determining the film properties, but its exact role has not been clear. In this study, the effect of hydrogen on the growth and film properties of DLC has been examined by adding the hydrogen gas to the CH4 gas during deposition and by exposing the prepared films to the hydrogen plasma. As the content of additive hydrogen gas increases, the density and hardness of the film increase, but the growth rate decreases. The FTIR spectroscopy results show that the number of C-H bonds decreases with increasing the hydrogen gas. Also, the variation in the position of 'G' and 'D' peaks due to additive hydrogen, which has been measured by Raman spectroscopy, indicates the increase of sp3 fraction.

금속산화물 반도체 In_2O_3 촉매에 의한 일산화탄소의 산화반응

이성한,허권,전종호,김규홍,최재시 연세대학교 자연과학연구소 1985 學術論文集 Vol.14 No.-

순수한 In_2O_3, 환원된 In_2O_3, 그리고 NiO를 도프시킨 In_2O_3를 촉매로하여 CO의 산화반응을 433-513K 온도영역에서 실시하였다. 새로 도입된 시료상에서 산화반응은 촉매활성이 다른 두 영역을 나타내었다. 초기반응 단계에서는 Roginsky-Zcldovich 속도식에 잘 일치하며 활성화 에너지는 37.2kJ mol^-1이고, 촉매활성이 일정하게 나타나는 두번째 반응단계에서는 전반응차수가 1차이며 활성화 에너지는 27.2kJ·mol^-1로서 CO_2에 의한 억제효과를 나타내었다. CO_2trap을 사용한 결과 전반응 차수는 1.5차로서 CO에 대해 1차, O_2에 대해 0.5차의 의존성을 보였다. 결정내의 산소결함농도가 반응속도를 증가시킬 수 있는 요인으로 밝혀졌으며 CO의 흡착자리는 격자산소(O^2-_0)이고 O_2의 흡착자리는 촉매의 처리과정과 제조과정에 의해 형성된 산소공위 (V^x_o)로서 밝혀졌다. 반응속도론적 데이타와 전기전도도 데이타를 결부시켜 산화반응 메카니즘을 제안하였으며 산소공위가 반응속도에 미치는 효과및 산소공위에 O_2가 흡착하는 과정이 속도결정단계임을 설명하였다. A kinetic study of CO oxidation on pure, reduced, and NiO-doped Indium Sesquioxide systems was carried out in the temperature range of 433-513 K. Catalytic oxidation showed two step regions. First initial step of fresh sample followed the Roginsky-Zeldovich kinetics with the apparent activation energy of 37.2 kJ.mol^-1. The second step which showed a constant activity was found to be the approximate first order kinetics with the apparent activation energy of 27.2 kJ.mol^-1 and then the inhibition by produced CO_2 was observed. By use of CO_2 trap, however, the oxidation kinetics was found to be the first order with respect to CO and the one-half order to O_2. The rate determining step was considered as the adsorption process of oxygen on the surface of catalyst. The site for CO adsorption was the lattice oxygen (O_o^2-) and the site for O_2 adsorption was the oxygen vacancy formed by vacuum activation, hydrogen reduction, and NiO doping. It was believed that the oxygen vacancy was responsible for the catalytic activity for CO oxidation.

기업의 이익조정에 관한 이론적 검토와 연구전망

이재성,김창범,서일 동의대학교 경제경영전략연구소 2006 經濟經營硏究 Vol.4 No.1

That is, this paper is to analyze and document different vehicles & motivations, hypotheses on earnings management theoretically. Especially, this paper is to focus on the earnings management by the discretionary accruals. Recent studies evaluate discretionary accrual models' ability to isolate nondiscretionary and discretionary accruals. Such evaluations critically depend on assumptions about the behavior of earnings absent discretion(nondiscretionary earnings) and about how management exercises discretion over accruals conditional on nondiscretionary earnings. Tests of the discretionary accrual models' ability to identify discretionary accruals are joint tests of the accrual models and assumed models of earnings and managerial discretion. Evaluations of models using stock price association, in addition, crucially depend on assumptions about the relation between accounting numbers and stock prices. Discretionary accrual models' tests using stock prices are joint tests of earnings-price models. Managers may also reflect their private information about the firms1 future performance through the level of accruals. We find that managers intentionally manage earnings by increasing discretionary accruals. In conclusion, these studies indicate that the informativeness of discretionary accruals increase as the accrual quality increases, that is, the informativeness of discretionary accruals is depending on the quality of earnings.

토끼 간조직의 Stimulatory Guanine Nucleotide 결합 단백의 αsubunit 에 대한 cDNA 염기서열에 관한 연구

이상훈,노연희,한중수,고재경 한양대학교 의과대학 1993 한양의대 학술지 Vol.13 No.1

G proteins, a family of guanine nucleotide-binding protein superfamily, are involved in transmembrane signaling systems as transducers. In this study cDNAs encoding αsubunit of the stimulatory G protein (G α ) from rabbit liver were cloned and their nucleotide sequences were determined : a λgt 11 cDNA library from total cellular poly (A)' mRNA in rabbit liber was screened for recombinant λDNA that codes for G α with labeled probe. The probe used was an EcoRI digested 3' end fragment of cDNA for G α from olfactory neuroepithelium of rat. Six of the approximately recombinant clones were screened by in situ hybridization and by autoradiography, detecting sixteen positive clones. These clones were tested using polymerase chain reaction (PCR) technique and thirteen of them were turned out to have two sets of conserved sequence in αcDNA. Four clonse among them were selected form analysis of their cDNA sequences, showing the presence of two types of cDNA, namely and with the total length of nucleotide sequence of1.392bp and 1.613bp, respectively . From nucleotide sequence analysis the amino acid residues of -1 and α-2 were deduced : they contain 335 and 386 amino acid residues (including the initiator methionine), respectively. The calculated molecular weights for and were 38.9kd and 44.6kd, respectively. The significant difference in size between two cDNAs for G αseemed to be due to the assumption that alternative promoter and leading exon might be involved in transcribing the mRNA for . Two types of cDNA from rabbit liver shared over 95% of amino acid homology with that from rat olfactory neuroepichelium if deleted portions are not counted. More information on the cDNAs could be obtained through further studies such as Sl nuclease protection experiment, expression and mutation study.

ENONCIATION에 있어서 MODALITE에 관한 연구

이성재 釜山大學校 1986 人文論叢 Vol.29 No.1

감탄구조에 관한 연구

이성재 釜山大學校 1984 人文論叢 Vol.26 No.1

커널 모듈을 이용한 리눅스 시스템 해킹 방법론 고찰

이현진,서재현,김상균 인제대학교 2003 仁濟論叢 Vol.18 No.1

현재의 리눅스 시스템은 커널의 확장성을 위해서 동적으로 원하는 기능을 언제든지 커널에 삽입하거나 제거하는 커널 모듈 방식을 지원한다. 최근에 들어 침입당한 시스템에서 자주 발견되고 있는 백도어는 이러한 커널 모들에 기반을 둔 것들이 많다. 커널 모들에 대해 살펴보고, 어떻게 백도어로서 작동할 수 있는지 그 기술적 방법에 대해 알아본다. 그리고 커널 모듈 기반의 해킹 대응을 위한 향후 연구 방향을 제시한다. systems support the kernel module that allows dynamical addition and removal of kernel for extensibility Recently, some backdoors detected in hacked systems are based on the kernel module. We discuss the kernel module, and how it works as backdoor. Furthermore, future works are suggested to deal with the kernel module based hacking.