Peer-to-Peer 환경에서의 정보 공유를 위한 인증 메커니즘 구현

이정기,배일호,이철승,문정환,박찬모,이준,Lee, Jeong-Ki,Bae, Il-Ho,Lee, Cheol-Seung,Moon, Jung-Hwan,Park, Chan-Mo,Lee, Joon 한국정보통신학회 2002 한국정보통신학회논문지 Vol.6 No.7

정보사회로 진행되어 감에 따라 컴퓨터 네트워크 사용 및 규모의 증대는 더욱 가속화되어 가고 있다. 또한 컴퓨터 네트워크를 통해서 교환되는 정보의 양의 증가와 함께 네트워크의 보안성이 새로운 문제점으로 부각되고 있다. P2P는 자유로운 네트웍을 구성할 수 있고, 중앙 서버 기능을 없애거나 약화시켜서 각 User간에 참여판 수 있는 개방 네트워크이기 때문에, 각 User간 인증에 관한 문제가 대두되고있다. 네트웍에 있는 어떤 사용자가 공개된 환경에 있다고 가정하면, 각 User간에 허가받은 사용자에게만 접속을 제한하기 위해서는 서비스에 대한 요구를 인증 해야한다. 본 논문에서는 이를 해결하기 위해 P2P 환경에서 보안을 유지하는 방법을 제안하고, P2P 환경에서 안전하게 정보를 공유할 수 있는 메커니즘으로 Kerberos 인증 메커니즘을 인용하여 인증 메커니즘을 설계하였다. According as progress by information society, computer network use and enlargement of scale are accelerated more. Also, with good physician increase of information that is exchanged through computer network, security of network is embossed to controversial point that is new. Because P2P as that remove or weakens center server function is open network that can participate between each user, problem about authentication between each users is risen. If certain user in network i3 in open environment, this user must authenticate request about service to user who is admitted between each user to limit connection. This treatise proposed method to keep security in P2P environment to solve this and designed certification mechanism that quote Kerberos certification mechanism to mechanism that can share information safety in P2P environment.

혼합 체적-경계 적분방정식법을 이용한 응력확대계수 계산

이정기,이형민,Lee, Jung-Ki,Lee, Hyeong-Min 대한기계학회 2003 大韓機械學會論文集A Vol.27 No.7

A recently developed numerical method based on a mixed volume and boundary integral equation method is applied to calculate the accurate stress intensity factors at the crack tips in unbounded isotropic solids in the presence of multiple anisotropic inclusions and cracks subject to external loads. Firstly, it should be noted that this newly developed numerical method does not require the Green's function for anisotropic inclusions to solve this class of problems since only Green's function for the unbounded isotropic matrix is involved in their formulation for the analysis. Secondly, this method takes full advantage of the capabilities developed in FEM and BIEM. In this paper, a detailed analysis of the stress intensity factors are carried out for an unbounded isotropic matrix containing an orthotropic cylindrical inclusion and a crack. The accuracy and effectiveness of the new method are examined through comparison with results obtained from analytical method and volume integral equation method. It is demonstrated that this new method is very accurate and effective for solving plane elastostatic problems in unbounded solids containing anisotropic inclusions and cracks.

Whirling machine의 성능 개선을 위한 연구

이정기,양우석,손재석,한희덕,김한수,Lee Jung-Ki,Yang Woo-suk,Son Jea-seok,Han Hui-duck,Kim Han-soo 대한기계학회 2005 大韓機械學會論文集A Vol.29 No.10

In order to meet the increasing competitive pressures coupled with higher demands for component quality, whirling machines have been at the cutting edge of the automobile industry for more than 25 years. The hard whirling process can save on machining time and operation elimination. Hard whirling is done dry, without coolant. The chips carry away nearly all of the heat during cutting, leaving the workpiece cool and minimizing any thermal geometry variations. The surface finish and profile accuracy are close to grinding quality. Whirling machines usually consist of four major parts; 1) loading system that requires the necessary axial speeds, 2) head stock that needs high precision clamping and positioning system at the chuck and tailstock, 3) whirling unit that demands the high cutting speeds and cutting power fer cutting deep thread profiles and 4) unloading system that requires an easy workpiece unloading. Also, capabilities of the whirling machine can be improved by attaching a vision system to the machine. Most of whirling machines in Korean automobile industry are imported from the Leistritz company, Germany and the Hasegawa company, Japan. Tn this paper, a basic research will be performed to improve and enhance the existing whirling machines. Finally, a new Korean whirling machine will be proposed and developed.

실도로 주행을 반영한 자동차 온실가스 배출 특성 연구

이정기,용기중,김자륭,엄성복,Lee, Jung-Ki,Yong, Geejoong,Kim, Cha-Ryung,Eom, Seong-Bok 한국자동차안전학회 2018 자동차안전학회지 Vol.10 No.3

Greenhouse gas is the big issue of the whole world. So foreign countries, EU, USA, Japan, China and Korea made the policy for reducing greenhouse gas. For calculation of reduction, it is necessary to know the quantity of current greenhouse emission per year in Korea. It is not reflected real driving condition for measuring the Fuel economy and greenhouse gas. The subject of this study is to figure out the characteristics which influence on greenhouse gas in real driving condition. And final goal is applying the policy greenhouse emission reduction.

국제조세에 있어서 이전가격과세제도에 관한 연구

이정기(Lee Jung-Ki) 한국문화산업학회 2006 문화산업연구 Vol.6 No.2

In the recent years international transactions have sharply increased with the launching of WTO and globalization of Korean economy. The inbound investment of foreign multinationals into Korea and at the same time outbound Investment of Korean firms have rapidly increased. As the majority of advanced countries including the USA in the last 20 years has strengthened their sovereign position concerning taxation of foreign firms, Korea also had the strong need to tax multinational firms effectively. In this study we suggest the following reform directions for the transfer pricing taxation system. First, The current limit of fines should be removed to secure the taxpayer's bona-fide obligation to submit evidence materials, as the case of the USA. Second, Even though it is impossible to make an accurate computation of arm's length prices, it is very important for effective transfer pricing taxation. Thus it would be desirable to set and apply the range of arm's length prices. Third, It is necessary to accumulate comparable transactions materials to compute arm's length prices and to instruct transfer pricing experts. In the recent years international transactions have sharply increased with the launching of WTO and globalization of Korean economy. The inbound investment of foreign multinationals into Korea and at the same time outbound Investment of Korean firms have rapidly increased. As the majority of advanced countries including the USA in the last 20 years has strengthened their sovereign position concerning taxation of foreign firms, Korea also had the strong need to tax multinational firms effectively. In this study we suggest the following reform directions for the transfer pricing taxation system. First, The current limit of fines should be removed to secure the taxpayer's bona-fide obligation to submit evidence materials, as the case of the USA. Second, Even though it is impossible to make an accurate computation of arm's length prices, it is very important for effective transfer pricing taxation. Thus it would be desirable to set and apply the range of arm's length prices. Third, It is necessary to accumulate comparable transactions materials to compute arm's length prices and to instruct transfer pricing experts.

체적 적분방정식법을 이용한, 다수의 함유체를 포함한 반무한 고체에서의 탄성해석

이정기(Jung-Ki Lee),구덕영(Duck-Young Ku) 대한기계학회 2008 大韓機械學會論文集A Vol.32 No.2

A volume integral equation method (VIEM) is used to calculate the plane elastostatic field in an isotropic elastic half-plane containing multiple isotropic or anisotropic inclusions subject to remote loading. A detailed analysis of stress field at the interface between the matrix and the central inclusion in the first column of square packing is carried out for different values of the distance between the center of the central inclusion in the first column of square packing of inclusions and the traction-free surface boundary in an isotropic elastic half-plane containing multiple isotropic or anisotropic inclusions. The method is shown to be very accurate and effective for investigating the local stresses in an isotropic elastic half-plane containing multiple isotropic or anisotropic inclusions.

고객의 통제력 인지가 계약서비스관계에 대한 만족도 및 충성도에 미치는 영향에 관한 연구

이정기(Lee, Jung Ki) 한국서비스경영학회 2013 서비스경영학회지 Vol.14 No.1

major strategic thrusts and tried to deliver quality service to win customer satisfaction. It is especially important for companies that offer services on a contractual basis to keep their customers satisfied and to maintain their customer loyalty. Nonetheless, customers of contractual services (for example, life insurance) are reported to have a high propensity to experience dissatisfaction. This study posits that a customer`s satisfaction with a contractual service relationship would be enhanced if his/her perception of risk and uncertainty involving the service can be lowered effectively. It proposes and empirically tests perceived control as a variable that has a high potential in reducing customers` perceived risk and enhancing customer satisfaction with service relationships. Data were collected by using a survey research from 210 life insurance policy holders. The study found that the life insurance service customers` satisfaction was affected by their perception of control, which in turn has a significant iniluence on their relationship loyalty to the insurance company.

경제개방에 있어 자본소득과세에 미치는 영향에 관한 연구

이정기(Lee Jung-Ki) 한국경영교육학회 2004 경영교육연구 Vol.36 No.-

본 연구에서는 경제개방이 조세정책에 미치는 영향과 관련하여 중장기적으로 가장 중요한 문제라 할 수 있는 자본시장 통합의 진전이 조세제도에 어떤 영향을 미치는가에 관한 연구이다. 이러한 기존의 이론 및 주장이 현실에서 어떤 형태로 발생하고 있는지를 살펴보고, OECD 국가들의 세율과 세수자료 등을 이용하여 법인세 및 기타 조세정책의 변화를 파악한 중요한 결과는 먼저 각국의 법인세 명목 세율은 하락하는 경향을 보이고 있다. 그러나 명목세율의 하락에도 불구하고 법인세의 세수기능은 약화되지 않고 있다. 시장의 통합도가 높은 유럽에서도 그러하다. 즉, 현실은 자본시장의 통합이 진전되면서 조세경쟁이 발생하여 법인세가 크게 축소되리라는 우려 또는 이론의 예측과는 상당한 차이를 보이고 있다. This report studies tax polices in an open economy : the effects of globalization on capital income taxes. This report theme is one of the most important issues on that topic in the long term. A concern has been raised for the future of capital income taxes, predicting tax competition will erode the base of capital income taxes, thus causing a fall in the tax revenue. We tried to evaluate how meaningful such a prediction is, by using the tax revenue data of OECD countries, After observing some discrepancy between the predicting and the reality, we provided more new theories to explain such a discrepancy. General policy implications on tax policies have also been discussed. More use of subsidies together with less use of tax incentives has been suggested as a policy direction. We also discussed the policy implications of OECD agreement on Harmful tax competition.

경범죄처벌법의 실효성 있는 개선방안

이정기(Lee, Jung-Ki) 한국법학회 2018 법학연구 Vol.71 No.-

경범죄처벌법은 1954년 제정 이래 총 17차례의 개정을 거쳐 현재 46개의 처벌조항으로 구성 · 운영되고 있다. 전부개정은 1983년 제4차 개정 이후 두 번째 개정으로서 2013. 3. 22. 부터 시행되고 있다. 이 개정안은 관공서 주취소란, 지속적 괴롭힘(스토킹), 광고물 무단부착, 구걸행위 등을 새롭게 경범죄로 지정하는 한편 출판물의 부당게재, 거짓광고, 업무방해, 암표매매 등의 벌금을 10만원에서 20만원으로 상향 조정 하였다. 더불어 기존에는 단속 시 법원에서 즉결심판 처분을 받아야 했던 음주소란, 쓰레기투기, 거짓신고 등 27개 조항과 신설된 위 스토킹 까지 총 28개 항목이 통고처분 대상이 되었다. 경범죄처벌법은 형법과 각종 특별법으로 처벌하기에는 불법행위가 경미하지만 방치하면 더 큰 범죄로 나아갈 수 있는 행위를 사전에 제지하여 사회 공공질서를 확립하기 위하여 제정된 법률이다. 한편, 그간의 법률 개정이 새로운 조항 신설에만 맞추어 진행되다 보니 46개 조항 중에는 ‘54년 제정 이래 단 한 번도 개정되지 않은 조항이 있거나, 다른 법률과 유사한 내용이 있고, 또 현재는 비범죄화 되어 단속 필요성이 떨어진 조항도 일부 있는 것이 사실이다. 경범죄처벌법은 기초질서 확립과 선진화를 위해서는 필요하다. 그러나 일반적인 형사사법 절차를 거치기에 부담스러운 영역에 대한 처벌의 실효성을 확보한다는 측면에서 긍정적인 견해도 있지만, 불분명한 구성요건 규정을 빌미로 국가 공권력을 확대하기 보다는 과태료와 범칙금을 모두 행정벌로 통합하자는 대안을 제시하며 법령 자체의 폐지를 촉구하는 견해가 대립되기도 한다. 본 연구에서는 아래에서 서술하는 바와 같이 사회질서를 위한 일부 유형에 대하여 경범죄규정의 존속은 필요하다는 결론 하에, 경범죄처벌법을 비롯한 기초질서 위반사범을 규율하는 법령은 어떠한 법령보다도 시대적인 변화를 제대로 반영해야 한다는 점과 개인 사생활의 자유를 비롯한 기본권을 제한 할 위험성을 내포하고 있으므로 형사법의 대원칙인 죄형법정주의에서 결코 자유로울 수 없는 특수성을 고려하여 개정 경범죄처벌법의 내용 가운데 개정 및 삭제가 필요한 규정과 신설이 요청되는 영역을 나누어 검토하고, 이를 토대로 기초질서위반사범을 규율하는 법령의 형사 정책적 의미에 관하여 논의해 보고자 한다. Since the enactment of the Minor Pandemic Act in 1954, it has been revised 17 times and is now composed of 46 penalties. The entire revision has been implemented since March 22, 2013 as the second revision since the fourth revision in 1983. The amendment is a new misdemeanor for the government to cancel the state, stigmatization, illegal advertising, and begging, while fines ranging from 100,000 won to 200,000 won for misappropriation of publications, false advertising, business interruption. In addition, a total of 28 items, including 27 items including drinking disturbance, garbage dumping, false declaration, and the new stalking, which had to be judged in court by the court, were subject to disposal. The Minor Criminal Punishment Act is a law enacted in order to punish the criminal law and various special laws in order to establish the social public order by restricting the illegal act to a minor crime in advance. On the other hand, since the revision of the law has been carried out only for the establishment of a new provision, there are some provisions of the 46 clauses that have not been revised since the enactment of the law in 54 and have similar contents to other laws. It is true that there are some clauses that fall. Minor crime punishment law is necessary for establishment of basic order and advancement. However, there is a positive view in terms of ensuring the effectiveness of punishment in areas that are burdensome to undergo general criminal justice procedures. However, rather than expanding the national power by the provision of unclear constitutional requirements, rather than expanding penalties and penalties There is a conflict of opinion that suggests alternatives and urges abolition of the laws themselves. In this study, we conclude that it is necessary to maintain the misdemeanor provision for some types of social order, as described below. The law regulating the violation of the basic order violation, including the misdemeanor punishment law, And the freedom to privacy, including personal freedom, including the risk of limiting the basic rights of criminal law, which is absolutely free from the criminal justice law, which is not free to consider the amendment and deletion of the provisions of the law for minor offenses, And to discuss the criminal policy implications of the laws governing the violation of fundamental order violations based on this review.

보험사기의 규제체계와 개선방안

이정기(Lee Jung Ki) 한국보험법학회 2017 보험법연구 Vol.11 No.1

보험제도는 미리 통계에 기초하여 같은 종류의 위험에 처해 있는 사람들이 산출된 일정한 기금을 각출하여 공동 준비금을 마련한 후, 그때부터 우연히 사고를 당했을 때 이 공동준비금으로부터 일정 금액을 지급 받도록 해서, 공동 부담하게 하는 위험부담을 분산시키는 긍정적인 면을 지니고 있다. 그러나 이러한 보험 제도를 악용하여 이득을 취하려는 시도가 많아지면서 효과적인 대응을 하지 못한다면 보험제도는 본 취지의 기능을 잃어 오히려 사회안에 경제적인 불안을 일으키고, 선량한 보험계약자의 보험료 인상이라는 결과를 초래한다. 즉, 보험사기로 인한 피해는 보험회사에만 적용 되는 것이 아니라 선의의 보험계약자 다수에게도 그 영향을 미친다. 따라서 보험사기행위에 적절한 대응을 함으로써 보험제도의 순기능을 보호하기 위한 각종 방안이 논의되어지고 있는 상황이다. 현재보험사기예방관련 실정법이존재하기는하나 대부분의보험사기는 형법상사기죄로 처리되어지는데, 이중대부분보험사와합의를거쳐집행유예또는벌금형에처해지고있어 그에 대한처벌이너무약해 보인다. 위형법외에 보험업법등개별법을 포함하여산재되어 있는 보험사기의 규정을 일괄적으로 정비하기 위해 특별법 제정 등의 방안이 제시되었다. 본 논문에서는보험사기의개념을 정리한후, 사기죄의일종인 보험사기에대한형법학적접근과보험사기에대한형법외의대응방안을통해관련법적문제들을검토하고자하였다. 또한, 형법 외의 또 다른 대응방안으로 2016. 03. 03. 국회를 통과, 현재 시행중인 보험사기 방지특별법의 내용과 그 문제점 및 한계를 파악한 후 이를 통하여 보험사기에 대한 예방과 제재가 효과적으로 이루어지도록 법적ㆍ제도적 개선방향을 마련해 보고자 한다. The insurance system is based on the statistics in advance so that people who are in the same kind of risk will be able to collect a certain amount of funds and prepare joint reserves. Then, when the accident happens accidentally, It has a positive aspect to spread the risk burden. However, if attempts to gain benefits by exploiting these insurance schemes become more frequent and fail to respond effectively, the insurance system loses its function and causes economic insecurity in the society, resulting in a premium increase for good policyholders. In other words, the damage caused by insurance fraud is not limited to the insurance company, but it affects many good insurance contractors. Therefore, various measures are being discussed to protect the pure function of insurance system by appropriately responding to insurance fraud. Currently, insurance fraud prevention laws exist, but most insurance fraud is dealt with as a criminal offense under the penal code, most of which are punished for being suspended or fined after agreement with the insurer. In addition to the above criminal law, measures such as the enactment of a special law have been proposed in order to collectively regulate insurance fraud that is scattered including individual laws such as the Insurance Business Law. In this paper, after analyzing the concept of insurance fraud, we tried to examine related legal problems through the criminal approach to insurance fraud, which is a kind of fraud, and countermeasures against insurance fraud. In addition, as another countermeasure other than the criminal law, after passing through the National Assembly on March 03, 2016, the contents of the Special Act on the Prevention of Insurance Fraud, and the problems and limitations thereof, We want to establish institutional improvement direction.