흉선종과 관련된 중증근무력증에 관한 임상적 연구

이석중,이광우,이상복,명호진 대한신경과학회 1987 대한신경과학회지 Vol.5 No.1

다양한 기질을 이용한 혐기성 발효 수소 생산의 가능성 평가

이석중,배혜득,배지현,최정동,안영호 대한환경공학회 2007 대한환경공학회 학술발표논문집 Vol.2007 No.12

Focus On 3D 그래픽칩-(주) 코아로직: 3D그래픽칩 HERA 3D(CL85425)

이석중,Lee, Seok-Jung IT-SOC협회 2006 IT SOC magazine Vol.12 No.-

음이온 선택도 특성

이석중,안현경,이인형 한국산학기술학회 2002 한국산학기술학회논문지 Vol.3 No.3

이온교환은 액체상 이온과 고체상 이온간의 화학반응이며 연수 및 탈염공정, 특정물질의 제거 및 회수, 토양을 통한 이온성 물질의 이동에서 멀리 이용되고 있다, 이온 선택도는 원자가가 높을수록, 수화반경이 작을수록 증가한다. 본 연구는 평형 이온교환에서 결정된 이온 선택도가 칼럼 이온교환에 적용되는 가를 조사하였다. 음이온 교환수지에 대한 이온 선텍도 순서는 OH^- < F^- < HCO^3- < CI^- < Br^- ≤ NO^3- < SO₄^2-이였으며, 음이온 칼럼교환에서도 동일하였다. 또한 바탕 양이온의 전하가 낮을수록 이온교환이 빠르게 진행됨을 알 수 있었다. Ion exchange is a chemical reaction between the ions in solution phase and ions in solid phase and is widely used in softening, demineralization, removal and collection of specific ions, and ion migration in the ground water. The ion selectivity depends on the charge and the hydrated radius of ion. The objective of this study was to examine the applicability of anion selectivity obtained from the ion exchange equilibrium (OH^- < F^- < HCO^3- < CI^- < Br^- ≤ NO^3- < SO₄^2-) to the column ion exchange. The column ion exchange was facilitated in the lower charge of counter-ion in the background electrolyte.

전도성 particle을 함유한 미세섬유의 제조와 전기적 특성

이석중,김형중,홍영택 한국고분자학회 2004 한국고분자학회 학술대회 연구논문 초록집 Vol.29 No.2

하지 방사통을 호소하는 퇴행성 요추 측만증 환자에서 선택적 신경근 차단술의 치료 효과

이석중,심대무,김태균,이성인 대한척추외과학회 2012 대한척추외과학회지 Vol.19 No.2

Study Design: Level III, Retrospective studies. Objectives: This study was conducted to evaluate the effects and usefulness of the selective nerve root block in advance for the Degenerative Lumbar Scoliosis patients, with radiating pain, who were scheduled for an operation. Summary of Literature Review: Selective nerve root block was introduced in 1971, by Macnab and it was used to make improvements for radiating pain, as a treatment of multiple lesions or a tool to help making a surgical decision, and to predict the result. After an introduction by Cooper, selective root block on degenerative sclerosis, with lower leg radiating pain, showed fine results on a short term follow-up and moderate to good results on long term follow-up. Materials and Methods: Between January 2005 to December 2009, 47 cases were selected from the patients, who underwent selective nerve root block, before the operation. The mean follow–up period was 38.4 months and the mean age was 67.1 years. The patients were divided into the operation group and the only selective nerve root block group. The treatment results in the SNRB group and the operation group were analyzed using Kim’s criteria and the Visual Analog Scale score. The groups were radiologically evaluated for the neural compression rate. Results: Among the 47 cases that were scheduled for an operation, 30 cases did not proceed to the operation. The average VAS score for the selective root block group and the operation group were 7.56 and 8.12, at the preoperative state and the preinjection state, respectively. After the selective nerve root block and surgical treatment, the scores were 3.71 and 2.64 at 1year follow up, respectively. There was no correlation with statistical significance between the initial VAS score and the degree of stenosis noted in the MRI (P>0.05). There was no statistical significant correlation between the initial relief from selective nerve root injections and the degree of stenosis noted in the MRI (P>0.05). However, there was a correlation with statistical significance between the operation rate and the degree of stenosis noted in the MRI (P<0.05). Conclusion: Selective nerve root block is considered to be an effective treatment for the Degenerative Lumbar Scoliosis patients with radiating pain, who are scheduled for an operation. 연구 계획: Level III, 후향적 연구목적: 하지 방사통을 호소하는 퇴행성 요추 측만증 환자에 대해 수술적 치료가 예정된 환자에서 수술 전 선택적 신경근 차단술을 실시하여 그 결과 및유용성에 대해 알아보고자 하였다. 선행 문헌의 요약: 선택적 신경근 차단술은 1971년 소개된 후, 다분절에 병변이 있는 경우나 수술 부위의 결정 및 술 후 결과의 예측에 도움을 주고 있으며, 하지방사통을 동반한 퇴행성 요추 측만증 환자의 선택적 신경근 차단술 또한 좋은 결과들이 보고되고 있다. 대상 및 방법: 2005년 1월부터 2009년 12월까지 5년 동안 본원에서 하지방사통증 동반한 퇴행성 요추 측만증으로 진단 받고 진행하는 신경증상이 동반되지 않고 심한 통증으로 수술적 치료가 필요하다고 판단하였던 40세 이상의 환자 중에 최소 1년 이상 추시가 가능하고 자기공명 영상을 1년이내에시행하였으며 선택적 신경근 차단술을 시행한 환자 47명을 대상으로 후향적으로 평가하였다. 신경근 차단술 후 수술을 시행하지 않은 군과 신경근 차단에도 불구하고 수술적 치료까지 필요하였던 환자군 사이의 임상적 결과는 김의 평가기준과 VAS score를 independent T-test를 이용하여 비교 분석하였다. 결과: 수술이 예정되었던 총 47예 중30예에서 수술을 시행하지 않고 호전되었으며, 선택적 차단술을 시행받은 47예 중 양호 이상의 만족할 만한 결과를 보인 경우는 17예(36.1%)였으며 수술을 시행한 17예 중 양호 이상의 결과를 보인 경우는 13예(76.4%)로 수술을 시행한 군에서 유의하게 좋은 결과를 보였다(p<0.05). 신경근 차단술 군과 수술 군에서 VAS 점수는 모두 향상되었으나 수술군에서 선택적 신경근 차단술을 시행한 군보다 향상된 결과를보여 수술 군이 수술을 시행하지 않은 군보다 유의한 동통의 감소 효과를 보였다(p<0.05)(Table 2). 결론: 신경근 차단술은 신경증상이 진행하지 않는 퇴행성 요추 측만증으로 인한 방사통 환자에서 수술 전 이용해볼 만한 유용한 치료방법으로 사료된다.

전기방사를 이용한 PAI-탄소미세섬유의 제조

이석중,손원근,홍영택,김형중 한국고분자학회 2004 한국고분자학회 학술대회 연구논문 초록집 Vol.2004 No.04

하이브리드 레이저 기술의 효율적 도입을 통한 품질 개선

이석중,문석환 한국의사결정학회 2008 의사결정학연구 Vol.16 No.1

Recently hybrid-laser welding technology has been getting increased attention due to the higher quality expectation of customers and severe competitions in the auto manufacturing industries. This research reports a successful application of the hybrid-laser technology to an automobile part welding process. The hybrid-laser welding provided better appearance quality, welding quality and productivity than the heat welding and vibration welding. Further experiments are required for the wide application of the hybrid-laser technology to the various auto part producing processes.

정전체제로부터 평화협정체제 구축까지 : 새로운 관점에서 비전과 요건

이석중 원광대학교 2005 圓光軍事論壇 Vol.- No.1

On the 4th six party talk, the construction of a peace regime in Korean peninsula was discussed through the process of searching for a peaceful resolution for North Korea nuclear Issue. And on the joint communique on Sept. 19, it was recorded that those direct related countries would form a separate forum to construct the permanent peace regime on Korean peninsula and launch a discussion. The 4th six party talk held recently was meaningful in a sense that it not only provided a clue for successful resolution on Korea nuclear issue, but it also prepared an opportunity to transform the state of Korean peninsula into a peaceful regime. This paper logically proved that the discussion on peace construction on Korean Peninsula is matured with positive criteria for a resolution in a peaceful manner, also showed the vision of constructing a peace regime on Korean Peninsula by comparing cases in 1997 four party talks with North, South Korean, US and China as participating countries, and finally presented a possible road-map that include a process of ending the armistice agreement in order to move to a peace treaty while considering the required criteria in a new point of view. Therefore, this paper considered matters that should be preconditioned or deliberated in a process of transforming from armistice agreement to peace treaty or after forming a peace treaty on Korean Peninsula during a process of moving into a peace regime from a peace treaty. Regarding a peace agreement, it is realistic that U.S and China would form a separate mutual joint communique of their own beforehand in order to admit the peace treaty between North and South Korea since we have to consider the political effect of those two super-powered countries. Because of the fact that armistice agreement itself included majority of contents that was already included in peace treaty and the 1992 basic agreement between North and South Korea also included the contents that would be included in peace agreement, consolidating these two agreements into one document would make a complete peace agreement. Various kinds of arms control scheme should be included In a peace treaty outline, and by compromising the previous proposals from both North and South Korea would enhance implementing the arms control process. It is the Rok-US alliance that would be most affected after discarding the armistice agreement and signing the peace treaty. During the process of peace treaty, the overall Rok-US alliance which includes UN's status, US's operational control on the military, issue of continuance of Rok-US combined Forces Command, and the size of US army in Korea with its role would face a fundamental structural change. The structural change in Rok-US alliance should be promoted in a way to minimize the effect of future Rok-US reliance structure.

평형 및 칼럼교환에서 양이온 선택도 특성

이석중,이인형 한국산학기술학회 2002 한국산학기술학회논문지 Vol.3 No.2

이온교환은 이온성 물질을 제거하는 가장 신뢰성 있는 단위공정일 뿐만 아니라 재사용의 측면에서 매우 경제적이다. 특히 이온교환은 토양화학 분야에서 지난 한 세기 동한 수많은 연구가 진행되어 왔으며, 여러 가지 수처리 공정에 널리 이용되고 있다. 이온의 선택도는 이온의 수화반경과 용액의 농도, 이온의 원자가에 따라 좌우된다. 본 연구는 양이온 평형실험과 칼럼실험을 통해 이온들의 선택도 순서와 바탕음이온에 따른 특성을 조사하였다. 양이온의 선택성은 농도가 낮을수록, 이온의 원자가가 높을수록 증가하였다. 평형실험의 양이온 선택도 순서는 H⁺ < K⁺≪ Cu²⁺< Co²⁺<Ca²⁺≪ Ce³⁺이며, 칼럼흡착에서도 선택도 순서는 동일하였다. Ion exchange is the most reliable process to remove the ionic impurities and the cconomic operation. Ion exchange is widely used in water and wastewater treatment especially softening and demineralization. Ion selectivity depends on the hydrated radius, charge of ions and concentration. The objective of this study was to determine the selectivity order of cations with equilibrium and column ion exchanges and to investigate the effect of the background anion on selectivity. Cation selectivity increases with decreasing concentration and increasing charge (H⁺ < K⁺≪ Cu²⁺< Co²⁺ <Ca²⁺ ≪ Ce³⁺)in equilibrium and column cation adsorptions.