용적변조회전 방사선치료에서 선량전달의 중단 및 재시작에 따른 정확성 평가

이동형,배선명,곽정원,강태영,백금문,Lee, Dong Hyung,Bae, Sun Myung,Kwak, Jung Won,Kang, Tae Young,Back, Geum Mun 대한방사선치료학회 2013 대한방사선치료학회지 Vol.25 No.1

Purpose: The accurate movement of gantry rotation, collimator and correct application of dose rate are very important to approach the successful performance of Volumetric Modulated Arc Therapy (VMAT), because it is tightly interlocked with a complex treatment plan. The interruption and restart of dose delivery, however, are able to occur on treatment by various factors of a treatment machine and treatment plan. If unexpected problems of a treat machine or a patient interrupt the VMAT, the movement of treatment machine for delivering the remaining dose will be restarted at the start point. In this investigation, We would like to know the effect of interruptions and restart regarding dose delivery at VMAT. Materials and Methods: Treatment plans of 10 patients who had been treated at our center were used to measure and compare the dose distribution of each VMAT after converting to a form of digital image and communications in Medicine (DICOM) with treatment planning system (Eclipse V 10.0, Varian, USA). We selected the 6 MV photon energy of Trilogy (Varian, USA) and used OmniPro I'mRT system (V 1.7b, IBA dosimetry, Germany) to analyze the data that were acquired through this measurement with two types of interruptions four times for each case. The door interlock and the beam-off were used to stop and then to restart the dose delivery of VMAT. The gamma index in OmniPro I'mRT system and T-test in Microsoft Excel 2007 were used to evaluate the result of this investigation. Results: The deviations of average gamma index in cases with door interlock, beam-off and without interruption on VMAT are 0.141, 0.128 and 0.1. The standard deviations of acquired gamma values are 0.099, 0.091, 0.071 and The maximum gamma value in each case is 0.413, 0.379, 0.286, respectively. This analysis has a 95-percent confidence level and the P-value of T-test is under 0.05. Gamma pass rate (3%, 3 mm) is acceptable in all of measurements. Conclusion: As a result, We could make sure that the interruption of this investgation are not enough to seriously affect dose delivery of VMAT by analyzing the measured data. But this investigation did not reflect all cases about interruptions and errors regarding the movement of a gantry rotation, collimator and patient So, We should continuously maintain a treatment machine and program to deliver the accurate dose when we perform the VMAT for the many kinds of cancer patients.

Numerical Analysis of the Effect of Contact Pressure on the Fretting Fatigue Life in a Press-Fitted Shaft

이동형,권석진,유원희,김영진,최재붕 한국물리학회 2009 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.54 No.3

This paper presents a numerical analysis of the effect of contact pressure on the fretting fatigue life, considering fretting wear in a press-fitted shaft. The fretting wear of press-fitted specimens subjected to a cyclic bending load was simulated under various contact pressure conditions by using a finite-element analysis and a numerical method. The variation of the fretting fatigue according to the change in the contact pressure was evaluated by using a stress-life approach considering the worn contact surface profile. We found that the distribution of contact pressure and the stress concentration at the contact edge of press-fitted shaft varied rapidly as a result of fretting wear at the initial stage of total fatigue life. Furthermore, as a consequence of fretting wear on the contact surface of press fits, the fretting fatigue life exhibited a minimum at a certain contact pressure and became nearly constant at high contact pressures. Therefore, we suggest that the evolution of the stress concentration due to fretting wear plays an important role in assessing the fretting fatigue life.

명예산업안전감독관 제도의 운영현황 및 개선방향

이동형,김병규 대한안전경영과학회 2002 대한안전경영과학회지 Vol.4 No.1

Though the Honorary Industrial Safety Supervisor System was activated from 1995, the system did not show the better effectiveness due to the unconcern of top management and the insufficient support of government etc. The purpose of this study is to analyze the problems of the system and to present the improvement direction of that system. The research result points out that we have to consider the following countermeasures; First, the government should make up the support system by a law dealing with proper compensation and professional education for the supervisor, and tax reduction for companies. Second, the companies should make an effort firming up the safety consciousness of top management, and strengthening the employees' concern about safety through continuous safety education and campaign by a labor union, and promoting the supervisor's pride through recognition from top management and other employees.

학교자문에서의 저항에 대한 사회인지이론적 고찰

이동형 한국심리학회산하학교심리학회 2011 한국심리학회지 학교 Vol.8 No.2

When delivering consultative services in schools, consultants need to understand 'resistance' within the context of consultation and develop skills to effectively manage it. With a growing interest in psychological and educational consultation in schools over the last few decades, research in this area has significantly been increased and a fair amount of literature has been published concerning resistance in school consultation. However, currently available discussions on this topic are limited in terms of their scopes and theoretical foundations, and an attempt to integrate them from a theoretical perspective has not been made yet. This article examines various aspects of resistance in school consultation from the perspective of Bandura(1986)'s Social Cognitive Theory. Specifically, this article conceptualizes resistance in school consultation and reviews various causes and types of resistance based on triadic reciprocality. This article also explores a potential role of self-efficacy in the consultee's motivational process of resistance. Overall. this article demonstrates that Social Cognitive Theory can serve as a useful theoretical and conceptual framework for understanding various aspects of resistance and developing a management plan with resistance in school consultation. 학교장면에서 효과적으로 자문을 제공하기 위해서는 자문과정에서 나타나는 다양한 ‘저항’을 이해하고 이에 적극적으로 대처하는 노력이 필요하다. 학교자문에 대한 전문적 관심이 증가하면서 외국 문헌을 중심으로 이 분야의 연구물이 꾸준히 증가하였고 학교자문에서의 저항에 대한 전문적 논의도 적지 않게 있었지만, 저항의 다양한 측면에 대한 개관이나 종합적인 이론적 분석은 부족하였다. 본 연구는 자문의 과정 및 성과에 영향을 미치는 주요 변인으로 지목되고 있는 저항에 대하여 사회인지이론적 관점에서 고찰함으로써 학교자문에 대한 연구와 실무 기반이 아직 취약한 국내의 실정에서 연구자와 실무자에게 유용한 지식 기반을 제공하고자 한다. 구체적으로 본 연구는 사회인지이론의 인과모델인 삼원교호작용(triadic reciprocality)에 기초하여 학교자문에서의 저항을 정의하고, 저항의 요인 및 유형에 대한 외국의 선행 연구들을 체계적으로 개관한다. 또한 자기효능감이 저항의 동기화 과정 이해에 어떻게 도움이 될 수 있는지를 탐색함으로써 이 개념의 잠재적인 역할을 고찰한다. 본 연구는 저항에 대한 사회인지이론적 분석이 저항의 다양한 측면을 이해하고 저항에 효과적으로 대처하는 데 유용한 이론적, 개념적 틀을 제공할 수 있음을 시사한다.

‘물권행위’ 개념에 관한 검토

이동형 민사법의 이론과 실무학회 2018 民事法理論과 實務 Vol.21 No.3

권리·의무의 변동은 법률행위에 의하여 이루어진다. 학설은 대체로 물권변동의 원인으로서 물권행위라는 개념을 인정하고, 물권행위를 ‘직접 물권변동을 목적으로 하는 의사표시를 요소로 하는 법률요건’이라고 하며, 민법 제186조의 ‘법률행위’는 바로 ‘물권행위’를 말하는 것이라고 이해한다. 그러나 민법 제186조가 갖는 의미 및 공시방법과의 관계에서 보면 통설이 말하는 물권행위라는 개념은 성립하기 어려우며, 물권행위라는 개념을 굳이 인정할 필요도 없다. 민법 제186조의 ‘부동산에 관한 법률행위’는 원칙적으로 부동산에 관한 물권변동을 목적으로 하는 법률행위, 즉 매매, 증여, 교환 등의 채권행위를 의미하는 것으로 이해되어야 한다. 채권계약만으로는 물권의 득실변경은 일어나지 않으며, 공시방법을 갖추어야만 비로소 물권의 변동이 생긴다는 의미로 이해되어야 한다. 등기나 인도 등 공시방법을 갖추는 것은 물권의 변동을 목적으로 하는 합의(계약)에 따른 채무의 이행 또는 변제의 한 내용으로 보아야 하며, 물권변동을 위한 채권계약과 공시방법 사이에 물권행위라는 개념을 개입시킬 필요가 없다. 그리하여 민법 제186조는 ‘물권변동에 관한 의사표시가 있다고 하더라도 등기를 하지 않으면 그 효력이 인정되지 않는다’는 의미로 새겨야 한다. 이와 마찬가지로 “동산에 관한 물권의 양도는 그 동산을 인도하여야 효력이 생긴다”라는 민법 제188조 제1항 역시 당사자 간에 물권을 양도하는 의사표시가 있다고 하더라도 인도하지 않으면 양도로서의 효력을 인정할 수 없다는 의미로 파악되어야 한다. The change of rights or obligation comes from Juristic Acts. Of them, Common opinion recognizes acts of real right as the change of property rights. Common opinion calls Act of Real Rights as legal requisition that has the element of the declaration of intention for immediate Changes in Real Rights. Common opinion also understands the Juristic Act of Civil Act §186 as Real Rights Act. But in the view of the purport of §186 and meaning and the relationship of the public notice, the conception of Real rights act can not be established. We need not recognize the concept of Real rights act. A real right by a juristic act over an immovable in §186 should be construed, in principle, as the juristic acts for change of real rights over immovable means juristic acts for claim as sale, gift, contract of exchange etc. In other words, we should understand that we cannot bring about the change of The acquisition, loss of, or any alteration in a real right with only contracts, but only with public notice we can make change of real right take place. Providing with public notice like registration or delivery of the Article should be regarded as a kind of discharge of obligation or repayment. the concept of real right act should not be intervened between contract for change of immovables and public notice. Civil Act §186 should be construed as in spite of declaration of intention, the change of real right cannot take place without public notice. In the same manner, “The assignment of real rights over movables takes effect by delivery of the Article of Civil Act §188 ① should be interpreted as that even if there were declaration for assignment between parties, the effect of assignment cannot be recognized without delivery.

P2P 방식의 파일교환에 있어서 인터넷 서비스 제공자의 著作權 侵害 責任

이동형,전정기 한국인터넷전자상거래학회 2006 인터넷전자상거래연구 Vol.6 No.3

…The development of personal computers and internet networking not only offer a lot of convenience to the normal life of human beings but also cause many unexpected legal problems. The issues on infringement of the copyright which the users of internet exchange or share MP3 files without permission from a copyright holder is one of them. Internet service providers or administrators of network on internet may play a certain role to infringe the copyright when they provides a useful network environment to exchange or share contents files among a number of users. Furthermore, it is not direct infringement of the copyrights that MP3 files exchange service is available through the P2P method. However the protection of the copyright is appeared because MP3 files exchange service acts as intermediary of the infringement of the copyrights. On the issue of copyright infringement of internet service providers, the concept of indirect infringement of copyright was accepted by the U.S. Court in the Napster case and Grokster case, and in Soribada case in the domestic Court. However. more cautious approach is needed to solve the problem because copy in private is permitted in the area of copyright law.

오행체질론에 의한 안전직무 설계

이동형,김재두 대한안전경영과학회 2003 대한안전경영과학회지 Vol.5 No.3

In the Oriental Medicine, the physical constitution of a human being can be classified into five characteristic elements. The remedy based on the five elements constitution has revealed excellent clinical effects so far. Therefore, it may be worthwhile to conduct job design researches considering the five elements constitution for improving the efficiency and safety of job. In this study, we examine whether the theory can be applied for job design through the experiment by ‘Digital-type Speed Anticipation Reaction Tester’ or not and suggest the desirable direction of job design.

Validity of an Executive Function Model of ADHD Symptoms, Reading Difficulty and Substance Abuse in Adults

이동형,Cynthia A. Riccio 한국임상심리학회 2009 Korean Journal of Clinical Psychology Vol.28 No.3

The current study presents an integrated executive function model that explains the interrelationships among deficits in two executive functions (working memory and inhibition), ADHD symptoms, and two conditions (reading difficulty and substance abuse) that are commonly comorbid with ADHD in adulthood. The validity of the integrated model was tested using structural equation modeling with an adult sample consisting of consecutive referrals to a university-based research project. The final model suggested that working memory problems directly contribute to reading difficulty as well as to inattentive symptoms in adults. Direct contributions of inhibition to ADHD symptoms were not supported. However, ADHD symptoms had direct and indirect contributions to substance abuse symptoms. Current findings suggest the crucial role of working memory in the manifestation of ADHD symptoms and comorbid reading problems and also suggest ADHD symptoms' contribution to the development of adult substance abuse. These findings were interpreted as generally supporting the hypothesis of the developmental heterogeneity of executive function profiles associated with the manifestation of ADHD symptoms and comorbidities in adulthood.

상표권 남용의 성립요건에 관한 대법원 판례의 검토

이동형 민사법의 이론과 실무학회 2013 民事法理論과 實務 Vol.16 No.2

The purpose of Trademark System is to contribute to the development of industry and to protect the interest of consumers by maintaining the business reputation of those persons using trademarks through the protection of trademarks. Trademark rights should belong to the person who has used the trademark for a long time and has accumulated the reputation of trade. Under the current Trademark Act, without application and registration of Trademark even though somebody has used the Trademark, he cannot be protected as the Trademark holder, the one who filed and registered the same of similar Trademark has the right as the Trademark owner. The problem is how to deal with the case that a person knew the fact a Trademark used by another person and widely known was not registered and filed and registered the Trademark and claims Trademark infringement the original user. The supreme court regard this kind of exercise of right as abuse of Trademark right. The court says “to be under the abuse of trademark rights, not needed is the subjective requirement which means that the purpose of exercise of trademark is to cause pain and harm to the other party without interest to the right user.” That is not accorded with the main stream of supreme court’s attitude. That standpoint is not understandable. The Trademarks which supreme court regarded as abuse of right were all nullified or cancelled before the decision. regarding to it, it is the problem that the court in charge of the infringement can decide the invalidity of the trademark. Until now, there is no case dealt with it, in patent infringement case the supreme court says that when the registered patent has the cause of invalidity it is possible. There is an opinion that the theory can be adapted to the trademark case. The general principle of abuse of rights is acknowledged when the right itself is legal, valid and flawless, and prohibition of abuse of rights does not mean the deprive or restraint but mean that only the limitation of the way of exercise of th right. But the in the case of abuse of patent right, it is clear and evident that the patent has the cause of invalidity. In this case, the patent right is to disapprove, the protection by injunction or infringement cannot be approved. Considering these, there are natural difference between abuse of patent having cause of invalidity and general that of right. So it has theoretical problem to treat these case as abuse of right.

HAZOP에 의한 K화학공장의 공정위험성 평가

이동형,배기웅,남소영,남경돈,이준열 대한안전경영과학회 2000 대한안전경영과학회지 Vol.2 No.1