소음 노출 남성 근로자에서의 청력저하와 혈청 마그네슘의 관련성

박완섭,이종영,정상재,유재영,최태성,홍성철,노성찬 大韓産業醫學會 2000 대한직업환경의학회지 Vol.12 No.1

목적 : 본 연구는 소음에 노출된 남자 근로자를 대상으로 장기간 소음 폭로가 혈청 마그네슘의 농도와 관련이 있는지를 검정하고 이러한 혈청 마그네슘의 농도가 또한 청력저하와 관련이 있는지를 파악하기 위하여 수행되었다. 방법 : 소음에 노출되는 178명의 연구대상자를 청력저하의 정도에 따라 세 그룹으로 분류하고, 구조화된 설문, 신체계측, 혈액검사 등으로 청력저하에 대한 감수성 요인과 혈청 마그네슘 등을 수집하고 측정하였으며, 대상자들의 청력 역치를 측정하기 위하여 청력검사를 실시하였다. 결과 : 본 연구의 결과를 요약하면 다음과 같다. 첫재, 청력저하에 관련된 개인의 감수성 인자라고 알려진 변수인 흡연유무, 나이, 혈압, 헤마토크리트, 콜레스테롤, 혈당 중에서 나이, 이완기 혈압이 단순분석에서 세 그룹간에 차이가 있었고(p〈0.05), 혈청 마그네슘의 농도 또한 세 그룹간에 통계적으로 유의한 차이가 있었으며(p〈0.05) 청력저하가 심할수록 혈청 마그네슘 농도는 낮아지는 경향을 보였다. 둘째, 그룹간의 소음 노출력은 차이가 있었지만 (p〈0.05) 청력보호구 착용상태에는 유의한 차이가 없었다. 셋째, 혈청 마그네슘 농도에 영향을 줄 수 있는 변수인 소음 노출 기간, 마그네슘 함량이 많은 음식의 섭취정도, 스트레스 수준 중에서 소음 노출기간이 혈청 마그네슘 농도와 유의한 상관관계를 보였고(p〈0.05) 노출기간이 길수록 마그네슘의 혈청농도는 낮아지는 경향을 나타내었다. 넷째, 주파수별로 청력저하와 관련된 감수성 요인들에 대한 다중회귀분석 결과 주파수 1,000 Hz에서는 연령이 좌,우측 귀 모두에서 유의한 변수로 채택되었으며 (p〈0.05), 연령이 증가할수록 청력저하가 심해지는 경향을 보였고, 주파수 4,000 Hz에서는 확장기 혈압, 소음 노출 기간, 혈청 마그네슘 등이 청력저하에 대한 감수성 요인으로 채택되었으며(p(0.05), 이완기 혈압이 높을수록, 소음노출 기간이 길수록, 혈청 마그네슘의 농도가 낮을수록 청력저하가 심해지는 것으로 나타났다. Objectivea : This study was conducted to investigate that the chronic noise exposure is associated with decreased serum magnesium concentrations and evaluate whether decreased serum magnesium is associated with noise induced hearing loss. Methods : One hundred seventy-eight male workers exposed to noise were selected and classified three groups by the degree of hearing loss. Hearing threshold levels were less than 30 dB at 1,000 Hz or less than 40 dB at 4,000 Hz In group I, more than 30 dB at 1,000 Hz or more than 40 dB at 4,000 Hz and 15 dB and less of pure tone average[PTA : (500 Hz+l,000 Hz+2,000 Hz)/3] in group II, more than 30 dB at 1,000 Hz or more than 40 dB at 4,000 Hz and over 15 dB of PTA in group III. Results : Serum magnesium concentrations were 2.42±0.26 mg/dl in group 1, 2.35±0.23 mg/dl in group n , 2.26±0.24 mg/dl in group II, respectively and significantly differ-ent between group I and group III (p〈0.01). It was negatively correlated with duration of the noise exposure as correlation coefficient (r) of -0.194 (p(0.05) . Analysis of the multipleregression on hearing threshold levels showed that serum magnesium, diastolic blood pres-sure, duration of the noise exposure were statistically significant at 4,000 Hz (p(0.05) . While only age was statistically significant at 7,000 Hz (p(0.05) . Conclusions : These results suggest that chronic noise exposure may induces decreasein serum magnesium concentrations and that its decreased concentration is related with noise induced hearing loss.

중증 세균 감염 및 내성균에 대한 Fosfomycin의 치료효과

김찬기,노승무,윤완희,장일성,배진선,손기섭 충남대학교 의과대학 지역사회의학연구소 1991 충남의대잡지 Vol.18 No.1

A Clinical study for the therapeutic effect of Fosfomycin was made in 20 cases with the severe infection and the resistent organisms against the other antibiotics. Fosfomycin was administered intravenously 2-4 gm daily in two divided for an average of 13.1 days. The overall effectiveness was 90% without any significant side effect and the effectiveness for the resistant organisms(13 cases) against the other antibiotics was 84.6%. These results demonstrated that Fosfomycin can be used effectively in the treatment of the severe infection and the resistant organisms against the other antibiotics.

단일 영역 열방출량 계산법을 이용한 스파크 점화 기관의 압력해석

전광민,명노완 연세대학교 산업기술연구소 1990 논문집 Vol.22 No.2

One-zone heat release analysis was studied theoretically and experimentally. A single cylinder spark-ignition engine was used for experiment. 20 cycles of cylinder pressure were taken at 2000 RPM, wide open throttle condition. The calculated amount of heat release at the end of combustion process matched well with the measured fuel energy which is the mass of fuel multiplied by lower heating value.

제트베인형 추력편향장치의 공기역학적 특성

박종호,이성노,이은모,신완순,이택상,길경섭 충남대학교 공업교육연구소 2000 論文集 Vol.23 No.1

The aerodynamic study of jetvane type TVC(Thrust Vector Control) were conducted using supersonic cold-flow system. The use of TVC Systems in particular jet vanes, are currently being researched for use in air launch, ship launch, underwater launch and high altitude maneuvering of tactical missiles and rockets. The necessity to generate control forces to rapidly change the course of the missile is frequently required when traditional, exterior aerodynamic surfaces are unable to produce these forces, when the flow over the control surface is insufficient. This situation can occur at launch, or high angles of attack of the control surfaces. Jetvanes performed well at all altitudes and environmental conditions, and jet vanes are extremely effective at deflection angles up to as high as 30 degrees, make them ideal for the launch and maneuver applications. In this study, aerodynamic performance test of jetvane type TVC was conducted, and The effect of shape and deflection angle of various types of jetvanes are investigated

초음속 유동장치의 설계 및 성능시험

박종호,이성노,이정민,이택상,신완순 충남대학교 산업기술연구소 1999 산업기술연구논문집 Vol.14 No.2

Theoretical analysis, design and evaluation of a supersonic cold-flow system were conducted. It is designed to study of jet-vane for Thust Vector Control system, but a design process is similar general that of supersonic cold-flow system. The nozzle for this system was designed same exit Mach number as that of real rocket motor, because the jet boundary of designed nozzle approximated to real jet boundary very closely. The working gas is air exit Mach No. is 2.88, and nozzle chamber volume is 1.5ℓ. From the result, proper test time is about 0.3 seconds, low pressure chamber pressure and the measured axial thrust are appeared to 83% and 83.7% of the theoretical data respectively. It is due to pressure loss in sudden divergent-convergent section.

글로벌폴리스와 희망의 시공간 -“글로벌 시티” 담론과 하비의 “희망의 공간”에 대한 비판과 변형

No Wan Kwack 서울시립대학교 도시인문학연구소 2009 도시인문학연구 Vol.1 No.2

마르크스 지대론의 확장과 현대 도시지대론을 위한 시론

곽노완(No-Wan Kwack) 경상대학교 사회과학연구원(마르크스주의 연구) 2017 마르크스주의 연구 Vol.14 No.3

좋은 삶과 기본소득 -기본소득을 향한 드워킨 분배정의론의 재구성

곽노완 ( No Wan Kwack ) 서울시립대학교 도시인문학연구소 2015 도시인문학연구 Vol.7 No.1

이 논문에서는 드워킨의 분배정의론, 곧 그의 자원평등론을 비판적으로 연구한다. 그 결과 그의 분배정의론이 가능한 복지수혜의 대상을 원칙적으로 공동체의 개별성원 전체로 확장하고 보편복지정책의 효율성을 인정한다는 점에서, 노동중심주의적·선별적인 전통적 복지패러다임의 한계를 어느 정도 넘어섬을 보일 것이다. 또한 그가 자원평등론을 구성하기 위해 요청하는 가설적인 시초의 평등한 상태, 곧 ‘시초평등’이 함축하는 ‘평등한 자원분배’를 단순한 방법론적 전제로 ‘약’하게 해석하는 것이 아니라 추구해야 하는 이상으로 ‘강’하게 해석할때, 분배정의에 대한 그의 원칙들이 기본소득제를 지지함을 보일 것이다. 나아가 이렇게 해석하는 것이 그의 분배정의론의 여러 난점들에 대한 해결책이 된다는 점을 보일 것이다. 마지막으로 그의 연구가 다 포괄하지 못하는 자본주의적 분배부정의를 고려할 때, 그의 분배정의론에 대한 이 글에서의 해석 또는 비판적 재구성이 그의 분배정의론을 보다 생산적으로 연구하는 방식이 될 수 있음을 보일 것이다. 드워킨의 복지이론이 전제하는 ‘시초평등’을 이글에서처럼 강하게 해석하여 이에 함축된 기회의 절대적 평등을 추구해야 할 분배정의로 수용하고 ‘누구도 선행하는 권리를 갖지 않는 자원’, 곧 “모든 자연 및 사회역사적으로 유증된 자원과 기회”에 대한 모두의 평등한 권리 및 그 제도화로서의 기본소득제를 인정할 때, 이는 자본주의 사회경제에 의해 구조화된 불평등의 시정을 견인할 수 있다. This article critically studies on the theory of distributive justice of Dworkin, i. e. the theory of equality of resources. As a result, this article shows that his theory gets over the some limits of traditional selective and workfare paradigm of welfare, insofar as his theory expands possible welfare recipients in principle to all individuals of a community and acknowledges the efficiency of universal welfare policy. This article shows also, that the principles of his theory support basic income, if the equal distribution of resources in his ‘equal initial situation’ is interpreted not weak as a mere theoretical premise but strong as an ideal of real distribution. Furthermore, this article shows that this interpretation can be the solution for the some intrinsic problems of his theory. At last, this article highlights that this interpretation or critical reconstruction of his theory can be a more productive study on his theory, considering structural injustice in a capitalistic society to that he does not devote deep study. If we acknowledge the right of all the people to all resources and opportunities which are inherited naturally and historically and the right of all to basic income as its institutionalization through interpreting ‘initial equality’ which Dworkin proposed strongly and accepting the absolute equality of opportunities implied in this interpretation as the distributive justice to be aimed, than this reconstruction of Dworkin’s theory can steer the modification of the structured inequality by capitalistic economic system. In this sense, this strongly realistic reinterpretation and reconstruction of Dworkin’s theory of distributive justice may introduce the new dimension for the radical theory of basic income.

급성 위식도정맥류 출혈에 내시경 N-butyl-2-cyanoacryl주입요법의 효과 TIPS의 치료 효과와의 비교 검토

노두영 ( No Du Yeong ),박선영 ( Park Seon Yeong ),주소영 ( Ju So Yeong ),박창환 ( Park Chang Hwan ),이완식 ( Lee Wan Sig ),주영은 ( Ju Yeong Eun ),김현수 ( Kim Hyeon Su ),최성규 ( Choe Seong Gyu ),유종선 ( Yu Jong Seon ),김세종 ( 대한소화기학회 2004 대한소화기학회지 Vol.43 No.3

Background/Aims: Though endoscopic therapies such as variceal ligation and sclerotherapy has been performed, bleeding from the large esophageal and gastric varices still poses significant risk of death. Decrease of portal pressure by TIPS (transjugular intrahepatic portosystemic shunt) or surgical shunt was indicated as cause of failure of endoscopic therapies. Treatment of N-butyl-2-cyanoacrylate has been especially effective for gastric variceal bleeding, but comparison with other treatments had not been reported yet. In this study, the effect of cyanoacrylate injection therapy was cross-examined with the result of TIPS in acute esophagogastric variceal bleedings. Methods: From April 1995 to June 2002, endoscopic cyanoacrylate injection therapy (43 cases) and TIPS (63 cases) were performed in our hospital. Each group was analysed regarding their clinical results including initial hemostasis rate, rebleeding rate, survival duration, mortality and morbidity. Results: Initial hemostasis rate was 95.3% in cyanoacrylate group and 92.1% in TIPS group. Cumulative probability of rebleeding was not different between two groups. Overall complication rates associated with the procedure were 50.8% in TIPS group and 9.3% in cyanoacrylate group. There was no significant difference between two groups in their survival rates. Conclusions: Cyanoacrylate injection therapy was relatively safe, and has comparable results with TIPS for uncontrollable and severe esophagogastric variceal bleedings. (Korean J Gastroenterol 2004;43:186-195)

8200호대 전기기관차 보조전원장치의 CIBCOS에 대한 LCC분석

김완일(Wan-il Kim),이계승(Kye-Seong Lee),정노건(No-Geon Jung),장진영(Chin-Young Chang),김재문(Jae-Moon Kim),구경완(Kyung-Wan Koo) 대한전기학회 2017 대한전기학회 학술대회 논문집 Vol.2017 No.7