유로퓸(III) β-디케토네이트 착물의 루이스 염기 배위에 따른 발광 특성 분석

이성환,이규환,Sung-Hwan, Lee,Gyu-Hwan, Lee 한국분석과학회 2015 분석과학 Vol.28 No.3

Lanthanide complexes have attracted much attention because of their unique light emitting property. The light-emitting efficiencies of europium β-diketonate complexes were compared with those of complexes coordinated by the ligands of amines or phosphine oxides. The results demonstrated that the complexes that were coordinated by phosphine oxides had higher light-conversion performance than those coordinated by amines. The highest light-emitting efficiency was observed when the ligand of trioctylphosphine oxide was coordinated. In order to determine the coordination equivalency of trioctylphosphine oxide in the above complexes, 31P-NMR and their photoluminescence spectra were measured. The findings showed that the europium β-diketonate complex had one or two coordination equivalencies of trioctylphosphine oxide according to the steric hindrance of its original ligand. 란탄족 착물은 독특한 발광 특성으로 인하여 많은 연구가 되고 있는 물질이다. 유로피움(III) β-디케토네이트 착물에 아민계열 또는 포스핀옥사이드계열 리간드를 추가로 배위 결합시켜 발광 효율을 비교하였으며, 아민계열 배위보다는 발광 효율 증진에는 포스핀옥사이드 계열이 더 좋은 추가 리간드임을 확인하였다. 그 중에서도 트리옥틸포스핀 옥사이드를 배위시켰을 때 가장 높은 발광효율이 관찰되었다. 추가로 배위될 수 있는 트리옥틸포스핀 옥사이드의 당량을 확인하기 위해서 ³¹P-NMR과 photoluminescence를 분석하였다. 유로피움(III) β-디케토네이트 화합물은 리간드의 입체장애에 따라 트리옥틸포스핀 옥사이드의 배위 당량은 1 개 또는 2 개가 가능함을 확인하였다.

주역의 '사상'과 사상의학의 '사상'의 연관성에 관한 고찰

이성환,김기현,Lee, Sung-hwan,Kim, Ki-hyon 사상체질의학회 2000 사상체질의학회지 Vol.12 No.1

1. 연구배경 : 사상의학의 '사상'은 주역의 '사상'에서 그 유래를 찾을 수 있다. 주역이 난해하다면 사상의학의 원전인 "동의수세보원"도 난해하기 때문에 주역의 사상과 사상의학의 사상이 다르다고 생각하는 견해가 많다. 따라서 사상의학의 창시자인 이제마 선생의 생각과 "동의수세보원"을 이해하기 위해서는 그 시대의 기초학문인 주역을 공부하는 것이 마땅하다. 그리고 그 공부를 바탕으로 사상의 의미를 이해하여 그것이 사상의학에 어떻게 적용되었는지를 고찰하고자 한다. 2. 연구방법 : 먼저 "사상" 이라는 개념을 주역의 이론으로 밝혔다. 그리고 현대과학에 사상을 비교하여 상호 연관성을 유추하였다. 이렇게 이해된 '사상'이 사상의학의 생리, 병리, 약리에 어떻게 적용되었는지를 살펴보았다. 3. 연구 결과와 결론 : 1. 주역의 '사상'은 우주, 인체, 윤리 등의 독립된 개체를 전체로 놓고 그 대표되는 특성의 차이에 따라 4가지 상으로 나뉘었다. 2. 주역의 사상은 현대과학의 상대성이론, 상보성이론, Digital 이론, Fractal 이론 등에 해당된다. 3. 현대 과학의 각 분야인 물리, 화학, 생물, 의학은 각기 다른 분야로서 일관된 연관성을 찾을 수 없어 보인다. 그러나 여기에 주역의 사상을 등장시킴으로서 현대과학의 각 분야들의 전체적인 상호 연관관계를 찾게 됨을 알 수 있다. 4. 사상의학은 인간의 체질, 생리, 병리, 약리 작용들을 주역의 사상이 갖고있는 4가지 특성에 따라서 4가지 group으로 구분하였다. 5. 사상의 각 특성을 알리기 위해서 현대물리, 화학, 생물, 의학의 새로운 사실들을 사상에 따라 group화하는 연습을 하는 것은 현대과학을 사상의학에 도입하는 작업을 용이하게 해주고 사상의학을 이해하는데 크게 기여할 것이다. Purpose : Many believe that the Sasang mentioned in the I Ching and the Sasang of Sasang Medicine (as expounded by Dr. Lee Je-ma in the book Longevity and Life Preservation in Oriental Medicine) refer to different concepts. This is untrue. In order to understand the thought patterns of Dr. Lee Je-ma and his book, it is necessary to first understand the concepts of the I Ching. The I Ching was the most respected text in Dr. Lee Je-ma time, and served as the foundation upon which his medicine stood. The purpose of this research is to understand the concept of Sasang in the I Ching and how it applies to the Sasang medicine. Method : The authors first defined the term Sasang according to the theory of I Ching. It was then discussed in relation to theories of modern science. Inferences were made as to how Sasang corresponds to the terminologies and concepts of modern science. The characteristics of Sasang interpreted through modern science were then applied to the physiology, pathology and pharmacology of Sasang Medicine. Results and Conclusion : 1. The Sasang theory of the I Ching organizes seemingly random and isolated natural phenomena into four distinct groups according to various attributes. The particular characteristics representing each of these four categories are known as Sasang. 2. The Sasang theory of I Ching has a strong correlation to the Theory of Relativity and the Theory of Complementarity, as well as the Digital and Fractal Theories. 3. By applying the Sasang Theory to various fields, the seemingly unrelated principles of physics, chemistry, biology and medicine can be seen as parts of a whole. 4. Sasang Medicine categorizes human morphology, physiology and pharmacology into four categories according to the characteristics defined by the Sasang Theory of the I Ching. 5. Grouping new discoveries of modern physics, chemistry, biology and medicine according to the Sasang Theory will bring to light the intricacies of the Sasang Theory while facilitating the incorporation of modern science into Sasang Medicine.

수리 가능 시스템의 신뢰성 분석 절차 및 사례 연구

이성환,염봉진,Lee, Sung-Hwan,Yum, Bong-Jin 한국군사과학기술학회 2006 한국군사과학기술학회지 Vol.9 No.2

The purpose of this paper is to present reliability analysis procedures for repairable systems and apply the procedures for assessing the reliabilities of two subsystems of a specific group of military equipment based on field failure data. The mean cumulative function, M(t), the average repair rate, ARR(t), and analytic test methods are used to determine whether a failure process follows a renewal or non-renewal process. For subsystem A, the failure process turns out to follow a homogeneous Poisson process, and subsequently, its mean time between failures, availability, and the necessary number of spares are estimated. For subsystem B, the corresponding M(t) plot shows an increasing trend, indicating that its failure process follows a non-renewal process. Therefore, its M(t) is modeled as a power function of t, and a preventive maintenance policy is proposed based on the annual mean repair cost.

오요탕(五搖蕩) 약침(藥鍼)이 알레르기 천식(喘息) 흰쥐의 말초혈관내(末梢血管內) T-cell과 혈청(血淸) IgE에 미치는 영향(影響)

이성환,신순식,이윤호,Lee, Sung-Hwan,Shin, Soon-Shik,Lee, Yun-Ho 대한침구의학회 2001 대한침구의학회지 Vol.18 No.1

Purpose : It has been reported that Oyo-Tang has an effect on allergic asthma clinically. In order to investigate the herbal acupuncture solution of the Oyo-Tang on allergic asthma, the Oyo-Tang herbal-acupuncture(OTHA) was applied on BL13 and ST36 of allergic asthma model of the rats. Methods : Then the concentration of serum IgE and the ratio of CD4+ and CD8+ T-cells in peripheral blood were measured and compared with control group. Results : The results obtained as follows; 1. The concentration of serum IgE was decreased significantly in both of the OTHA on BL13 group and on ST36 group as compared to control group. 2. The ratio of CD4+ and CD8+ T-cells in peripheral blood was not different statistically between the normal, the control, the OTHA on BL13 and the OTHA on ST36 group.

천식(喘息)의 침구치료(鍼灸治療)에 관(關)한 문헌적(文獻的) 고찰(考察)

이성환,김창환,이윤호,Rhee, Sung-Hwan,Kim, Chang-Hwan,Lee, Yun-Ho 대한침구의학회 2000 대한침구의학회지 Vol.17 No.3

The purpose of this study is to arrange the acupuncture therapy on the asthma from the oriental medical literature. The results obtained as follows. 1. The cause of the asthma is the intrinsic factors and the over-sensitive reactions. The decreased function of the lung and the kidney are chronically affected to the asthma. 2. The typical sign of the asthma is tachypnea and wheezes to be heard throughout the lung field, particularly during expiration. 3. Bladder meridian, Conception vessel, and Lung meridian used frequently for the acupuncture therapy, and Bladder meridian, Conception vessel, Stomach meridian, and Lung meridian used frequently for the moxibusrion on the asthma. The acupuncture points of Lung meridian used most frequently on the asthma, but the acupuncture points of Heart meridian have not used. 4. Acupuncture point at B13, CV22, LI4, CV12, CV17, 536, B12 used used frequently for the acupuncture therapy, and the acupuncture point at B13, CV22, B12, CV17, B43 used frequently for the moxibustion on the asthma Particularly B13 and CV22 used most frequently for the acupuncture therapy on the asthma.

일반목장과 로봇착유 목장에서 분리한 세균과 Staphylococcus aureus의 항생제 감수성 비교

이성환,김두,Lee, Sung-Hwan,Kim, Doo 대한수의학회 2014 大韓獸醫學會誌 Vol.54 No.1

This study was conducted to compare the patterns of mastitic pathogens and the antimicrobial susceptibility of Staphylococcus (S.) aureus from conventional milking (CM) and robotic milking (RM) dairy herds. To accomplish this, the minimum inhibitory concentrations of 14 antimicrobial agents were tested against S. aureus by the microdilution method. Regardless of the milking system, S. aureus, coagulase negative staphylococcus, and Streptococcus uberis were isolated. Additionally, significant differences in the antimicrobial susceptibility of S. aureus isolates between RM and CM farms were only observed in response to tetracycline.

삼음교 유침, 저주파 및 고주파 전침의 전.후 처치가 실험적으로 억제된 흰쥐의 장운동에 미치는 영향

이성환,임윤경,이현,Lee, Sung-Hwan,Yim, Yun-Kyoung,Lee, Hyun 대한침구의학회 2008 대한침구의학회지 Vol.25 No.4

Objectives : The aim of this study was to compare the effect of acpuncture and electroacupuncture of low(EA(L)) and high(EA(H)) frequencies at San Yin Jiu($SP_6$) and sham point in rats. We made suppressed state of intestinal motility with loperamide in rat and carried out needle retention acupuncture, low frequency electro-acupuncture and high frequency electro-acupuncture at ($SP_6$) in rat devided into pre-treatment group and post-treatment group. We fed charcoal to them after the treatment and measured the travel rate of charcoal in the gastrointestine track to analyze which treatment affected more in intestinal hypermotility Results : 1. Examining intestinal motility of normal rat treated with electro-acupuncture at $SP_6$, high frequency electro-acupuncture significantly increased intestinal motility. 2. Pre-treated with acupuncture at $SP_6$ significantly suppressed intestinal motility. 3. Post treatment with acupunture and low frequency electro-acupuncture at $SP_6$ showed significant increase of intestinal motility. Conclusions : As folowing study there were 21 groups to find out which treatment showed significant increase of intestinal motility and pre-treated acupuncture, post-treated with acupunture and low frequency electro-acupuncture at $SP_6$ was highly significant with control at the figure than any other groups.

한국철도의 효율적인 경영과 민영화

조한필(Han Pil Cho),이성환(Sung Hwan Lee) 한국물류학회 2012 물류학회지 Vol.22 No.5

우리나라는 100년 이상 건설과 운영을 함께 담당해오던 국유철도시대를 마감하고 2004년 시설과 운영을 분리하는 철도구조개혁 조치를 단행했지만 막대한 규모의 계속적인 누적 부채 발생으로 만성적인 경영적자 구조에서 벗어나지 못하고 있다. 이에 정부는 KTX 운영권의 민간 개방 등 제 2 철도구조개혁을 위한 민영화를 추진하고 있다. 그러나 이명박 정부가 현재 추진하고 있는 KTX 동일노선에 대한 경쟁체제 도입 방안은 세계적으로 사례를 찾기 어렵고 근본적인 방안으로 미흡한 것이 사실이다. 특히 정부의 민영화 방식은 장기적으로 운임상승과 철도공사의 부채해결 대책이 없고 KTX 운영권의 민간 개방에 따른 사업면허 등 법적 근거 미약 등 정치적, 법적 여러 논란을 빚고 있다. 이에 따라 현 단계에서 분명히 고려되어야 할 것은 철도 운영 경영효율화이며 민영화를 위한 사회적 합의와 기대효과에 대한 긍정적 비전을 제시하는 것이 중요한 것으로 인식했다. 본 연구는 영국, 일본 등 외국의 철도민영화 사례의 시사점을 토대로 우리나라 철도경영의 효율적인 민영화를 위한 방안을 분석, 검토했다. 이미 시설과 운영주체가 분리되어 안정적으로 역할을 수행하는 상황에서 3,381km에 불과한 영업거리 등 취약한 인프라와 현실을 감안하여 국가의 철도투자 책임을 명확히 한다는 측면에서도 지역별, 노선별 분할 민영화보다는 철도운영주체의 일괄적인 책임제민영화 방식으로 추진하는 것이 타당한 것으로 사료된다. Korean railroad has come to the end of government construction and operation management era in 2004 and the railroad system reformation measures was carried out the way of separating the infrastructure from the operation management. But operation deficit continues due to a large accumulated debt. This led the government to push ahead privatization of KTX management for ‘the Second Railroad System Reformation’ through partial privatization. However, President Lee’s government’s current proposal for shared KTX lines is unprecedented anywhere around the globe and is still immature to be implemented as the primary solution. Specifically, the government’s privatization plan does not address any issues regarding future increase in fares and Korean railroad’s debt pay-off in the long run. Also, there are many political and legal conflicts rising from lack of legal grounds such as business license for partial privatization of KTX operation management and solutions for management failure of KORAIL and debt-generating lines. It is necessary at this point to consider the ‘management efficiency’ of the railroad and it is also important to suggest positive vision about privatization to satisfy the social expectations and achieve social and political agreements. This study has analyzed and reviewed ways of effectively privatizing Korea’s railroad management based on implications from previous privatization cases in the U.K and Japan. Based on the fact that infrastructure and operation managements are naturally separated following the train-railroad separation and the fact that the infrastructure management is stable and the operation distance is only 3,381km, it seems more effective to privatize the operation management as a whole rather than executing multiple privatizations of operation management system based on the operating areas and lines.

중소기업 도산예측에 회계정보 유용성에 관한 연구

이성환(Lee, Sung-Hwan) 한국산학기술학회 2008 한국산학기술학회논문지 Vol.9 No.5

본 연구는 코스닥기업이 발표하는 회계정보가 유용하다면, 부도발생, 자본전액잠식, 거래실적부진, 감사의견 거절, 감사의견부적정으로 정의된 도산기업과 정상기업 간의 “회계정보는 어떠한 차이가 있는지” 재무지표를 기준으로 검증하는 것이 본 연구의 목적이다. 표본기업은 2000-2007년 도산한 코스닥기업 45개와 자산규모를 기준으로 대응하여 선정한 45개의 정상기업으로 구성하였으며, 같은 방법으로 모형확인을 위한 검증용 표본 30개 기업을 선정하였다. 실증분석 결과 도산 5년 전부터 본 연구에 사용된 17개의 재무지표 중 안전성에 관련된 변수들이 도산 및 정상기업에서 많은 유의한 차이를 보였다. 확인표본을 이용한 분류정확도는 도산 5년 전 76.7%, 도산 4년 전 76.7%, 도산 3년 전 65.0%, 도산 2년 전 76.7%, 도산 1년 전 88.3%로 나타났으며, 이는 정상기업에서 도산기업으로 서서히 진행되었음을 알 수 있는 것으로, 도산 5년 진부터 추정표본 83.3%, 확인표본 76.7%의 분류정확도를 보여 재무지표를 통한 회계정보의 유용성을 확인하였다. The purpose of this study is to verify how the accounting information of a bankrupt firm which is defined as a dishonor, an impaired total capital, a poor financial performance of a business, a rejection of auditor’s opinion and an incongruity of auditor’s opinion differs from that of a healthy firm on the basis of the index of financial affairs if the accounting information released by KOSDAQ is valuable. The sampling firms consists of 45 KOSDAQ firms that went bankrupt from 2000 to 2007 and 45 healthy firms which are selected in accordance with the sizes of assets. It has also selected the 30 sampling firms for the confirmation of the model in the same way. According to the result of the in-depth analysis, the variables related to security among the 17 indexes of financial affairs that have been used in this study for 5 years show a noticeable difference between a bankrupt firm and a healthy one. The accuracy of failed firms using this model for confirmation demonstrates 76.7% in 5 years before the bankruptcy, 76.7% in 4 years before that, 65.0% in 3 years before it, 76.7% in 2 years, 88.3% in I year. This data shows that the process from a healthy firm to a bankrupt one has progressed gradually and confirms the value of the index of financial affairs, exhibiting the accuracy with 83.8% of a presuming sample and 76.7% of a confirming sample for 5 years.

러일전쟁과 대한제국의 중립화 정책에 대한 비판적 검토

이성환(Lee, Sung-Hwan) 동아시아국제정치학회 2005 국제정치연구 Vol.8 No.2