부분입사형 초음속 터빈의 블레이드 표면 온도에 블레이드 앞전 형상이 미치는 영향

이상도(Sangdo Lee),김귀순(Kuisoon Kim),이인철(Inchul Lee),구자예(Jayae Koo),문인상(Insang Mun),이수용(Suyoung Lee) 한국추진공학회 2008 한국추진공학회지 Vol.12 No.4

In this paper, numerical analysis of the surface gas temperature on turbine blades has been performed to investigate the temperature profiles characteristics of a partial admission supersonic turbine driven by high temperature and pressure gas of pyro-starter with two different types of turbine blade edge shape. In order to examine the surface gas temperature on turbine blades at initial starting, computations tlave been carried out at several turbine rotational speeds in the range of 0~10,000 rpm for each type of turbine edge shape. Sharp edge and Round edge types were taken as the turbine edge shape factor. As turbine rotational speed increased, the average temperature of turbine blades was further decreased. It was also found that the surface temperature of turbine blades with a sharp edge was lower than round-type edge turbine blades.

A Study on a Job Stress Evaluation Methodology using data mining and RSM

Yonghee Lee,Dongchoon Lee,Byungun Lee,Sangdo Lee 대한인간공학회 2007 대한인간공학회 학술대회논문집 Vol.- No.-

Job stress is caused by a poor match between us and our complicated condition that can be classified with physical, psychosocial and environmental factors. While a factor analysis and management policy conduct through a survey research which is used to study job stress problem mostly, there are limitations such as dimensionality associated with large data set of stress factors problem. In order to address the limitations on the data computing and analysis capabilities, we propose an advanced survey analysis procedure incorporating Data Mining (DM) into a statistical analysis, and provide detailed statistical relationships among the factors and interesting responses by utilizing Response Surface Methodology (RSM). The objective of this research is to show how DM techniques can be effectively applied into a survey analysis related to a job stress evaluation by applying a correlation-based feature selection (CBFS) method.

BIM 사례연구를 통한 건설 PLM 설계에 관한 연구

이언(Eon Lee),강형석(Hyoungseok Kang),이상석(Sangseok Lee),노상도(Sangdo Noh),이창우(KwangMyong lee),이광명(ChangWoo Lee) (사)한국CDE학회 2010 한국 CAD/CAM 학회 학술발표회 논문집 Vol.2010 No.1

Building Information Modeling (BIM) is the virtual representation of the physical and functional characteristics of a facility from inception onward. As such, it serves as a shared information repository for collaboration throughout a facility’s lifecycle. BIM is a new paradigm which can perform a diverse engineering activity such as design, simulation, structure analysis, etc and support a based information model in construction industry. In these days, many construction companies tried to perform a project efficiently by constructing and using BIM and carried out a research related in PMIS(Project Management Information System), etc. But a real case of research focused on 3D modeling object and control and share of engineering information is insufficient. In this research, we suggest an efficient BIM model and information share system based PLM for collaboration based on analyzing and researching a case of constructing BIM when perform construction project.

Mechanism of multi-hop prefix Delegation using DHCPv6 prefix options

SangDo Lee,Yong-Woon Kim,Hyoung-Jun Kim 대한전자공학회 2005 ITC-CSCC :International Technical Conference on Ci Vol.2005 No.4

YOU MAY LIE WHEN YOU WEAR PRADA: THE EFFECT OF BRAND LOGO PRESENCE ON IMPLICIT-EXPLICIT ATTITUDES CONGRUENCY

Sangdo Oh,Chaeho Lee,Sukki Yoon,Kacy K. Kim,Yung Kyun Choi 글로벌지식마케팅경영학회 2015 Global Fashion Management Conference Vol.2015 No.06

This research examines the effect of luxury brand's logo on disparity between explicit and implicit attitudes. Using implicit association test, the results show that there is no correlation between implicit attitude and explicit attitude towrd a luxury product when luxury brand's logo is present (i.e., Prada). In contrast, implicit attitude and explicit attitude are negatively correlated when luxury logo is absent (i.e., Bottega Veneta).

A Study on Psychological Change of Depressed Children in a Psychotherapy Program with Loess

Lee Younghee,Lee Sangdo 국제온돌학회 2016 International Journal of Ondol Vol.9 No.2

The purpose of this study is to develop a psychotherapy program using loess that can help to reduce depression and daily life stress and to improve self - esteem. When depression begins in childhood, it is confirmed that the recurrence rate is very high in adulthood. There was no significant change in depression as a physical symptom with the use of loess, but it was significantly decreased in negative depression symptom that derogatory oneself, and significant decrease in loss of interest, behavioral problems, and depressed emotions. This suggests that psychological and social intervention for children with depression can be effectively promoted and depression can be reduced by suggesting appropriate psychotherapeutic interventions for children to cope with depression.

A Study on Threat Containment through VDI for Security Management of Partner Companies Operating at Industrial Control System Facility

( Sangdo Lee ),( Jun-ho Huh ) 한국정보처리학회 2019 한국정보처리학회 학술대회논문집 Vol.26 No.2

The results from the analysis of recent security breach cases of industrial control systems revealed that most of them were caused by the employees of a partner company who had been managing the control system. For this reason, the majority of the current company security management systems have been developed focusing on their performances. Despite such effort, many hacking attempts against a major company, public institution or financial institution are still attempted by the partner company or outsourced employees. Thus, the institutions or organizations that manage Industrial Control Systems (ICSs) associated with major national infrastructures involving traffic, water resources, energy, etc. are putting emphasis on their security management as the role of those partners is increasingly becoming important as outsourcing security task has become a common practice. However, in reality, it is also a fact that this is the point where security is most vulnerable and various security management plans have been continuously studied and proposed. A system that enhances the security level of a partner company with a Virtual Desktop Infrastructure (VDI) has been developed in this study through research on the past performances of partner companies stationed at various types of industrial control infrastructures and its performance outcomes were statistically compiled to propose an appropriate model for the current ICSs by comparing vulnerabilities, measures taken and their results before and after adopting the VDI.

Pregabalin add-on therapy using a flexible, optimized dose schedule in refractory partial epilepsies: A double-blind, randomized, placebo-controlled, multicenter trial

Lee, Byung In,Yi, Sangdoe,Hong, Seung Bong,Kim, Myeong-Kyu,Lee, Sang Ahm,Lee, Sang Kun,Shin, Dong-Jin,Kim, Jae Moon,Song, Hong Ki,Heo, Kyoung,Lowe, Wing,Leon, Teresa Wiley (Blackwell Publishing) 2009 Epilepsia Vol.50 No.3

<P>To evaluate the efficacy and safety of pregabalin (PGB) as adjunctive therapy, using a flexible-dosing schedule in Korean patients with refractory partial-onset seizures.</P>

사립대학의 법인세 및 상속 · 증여세 개선 방안 연구

이상도(Lee Sangdo),고상연(Ko Sangyeon) 한국조세연구포럼 2015 조세연구 Vol.15 No.3

본 연구는 비영리법인과 본질적 특성이 다른 사립학교의 특수성을 고려하여 현행 조세정책의 문제점을 지적할 뿐만 아니라 현 사립대학의 실무자들이 당면한 문제점 등을 고려하여, 사립학교의 설립목적에 적합한 합리적인 조세제도의 개선안을 도출하고자 법인세제등의 가장 대표적인 현안사항에 대하여 다음과 같은 개선안을 제시하였다. 첫째, 사립학교가 수익용 기본재산 대체 취득에 따른 법인세(상속세및증여세)의 과세면제가 필요하다. 현행 제도에서는 수익용 재산의 처분에 따른 양도차익 재원으로 교육비로 전출하는 경우만 법인세(상속세및증여세) 면세혜택이 부여된다. 타 수익용 기본재산으로 대체 · 취득하는 경우에는 고유목적사업으로 인정되지 아니하여 법인세가 부과될 뿐만 아니라 상속세및증여세가 과세되고 있다. 둘째, 사립대학 기부금의 획기적인 증가를 위해서는 대학기부금에 대한 세액공제 제도가 절실한 실정이며, 현재 경제상황을 비추어 볼 때 대학등록금의 인상조치가 어려운 실정이다. 이에 사립대학의 부족한 재정을 충족하는 합리적인 방안으로 현행 조세특례제한법 제76조(정치자금의 손금산입특례 등)의 사례와 같이 대학기부금에 대하여도 정치자금 세액공제와 같이 세액공제뿐만 아니라 손금산입도 가능토록 하는 특단의 별도 조치가 필요하다. 셋째, 사립학교법인 예금이자소득에 대하여 원천과세 대상으로서 이를 고유목적사업준비금에 전입한 경우에 한하여 현행 세법에서는 법인세를 환급해 주고 있다. 따라서 환급이 예상되는 대학의 이자소득에 대하여 비영리법인의 연합회 또는 중앙회 예탁금의 이자수입처럼 원천징수 대상에서 제외함으로써 사립대학의 자금사용의 편의성을 도모할 수 있도록 하는 세제 개선이 필요하다. 넷째, 사립학교법인이 수익용기본재산 매각후 3년 이내에 매각대금 이상의 대체자산을 취득하는 경우 증여세의 비과세가 필요하다. 현행 제도에서는 출연받은 재산을 3년 내 공익목적사업에 사용하여야 증여세가 비과세되지만, 수익증대를 목적으로 다른 수익용 기본재산으로 대체 · 취득하는 경우 증여세를 부담할 수 있는 불합리한 문제가 제기되고 있다. 상기와 같은 사립대학의 법인세및 상속․증여세 개선방안은 여러 특성상 일반 비영리법인에 비하여 그 본질이 다른 사학기관의 특수성을 고려하여, 사학기관의 설립목적에 적합한 합리적인 현행 조세제도의 개선안을 관련 조세정책 당국에 제시하는데 기여할 것으로 기대된다. This study is considering the essential characteristics such as non-profit corporation and is considering the peculiarities of the different private schools as well to point out the problems of the current tax policy, not practitioners of the current problems faced by private colleges, a reasonable taxation for the purpose of private schools established to derive the most improvement with respect to the outstanding issues of the corporate tax representative suggested the following improvements. First, private schools are needed tax exemption of Corporate income tax (inheritance tax and gift tax) in accordance with the basic assets acquired for replacement income. The current system, only if you move out as capital gains in education funding in accordance with the disposition of property for Corporate income tax (inheritance tax and gift tax) exemptions are granted. Replaced by a basic income, If you acquire property for other tax is imposed, there will be not considered as a unique project, as well as inheritance tax and gift tax purposes is taxed. Second, in order to increase the significant contributions of private universities and a tax credit for university contributions desperate situation, a situation the college of impressive measures in view of the current difficult economic situation. This reasonable measures to meet the current lack of finances of private universities Restriction of Special Taxation Article 76 also political fund donations, such as cases against the University of (palm inclusion of special political fund) tax credits and tax deductions as well as palm also be counted drastic measures are needed to separate ever possible. Third, only if a transfer to a private school and corporate deposits this unique business objectives reserves as a source taxable income for the current tax year is giving a tax refund. Therefore, it is necessary to ensure improved tax refund can be made subject to withholding ease of use of funds by private universities, like exempt from interest income on deposits of non-profit association or federation with respect to the interest income of the university are expected. Fourth, the gift tax exemption is needed if the private school corporation acquires a replacement asset sale proceeds less than three years after the sale of the main assets for profit. In the current system, but who appeared to be using the property in public interest projects within 3 years donation is tax-free, alternative to the default property for the purpose of increasing revenues for other revenue · problem is absurd to pay a gift tax if the acquisition has been raised. Corporat Income Tax and inheritance tax and gift tax Improvement of the private universities such as the improvement · taking into account the specificities of the different nature of the private school institutions compared to the general nature of various non-profit corporation, the related tax policy improvement of the current tax system reasonably suitable for the purpose of private schools established institutions is expected to contribute to present the authorities.

제어시설 사이버공격 대응을 위한 사이버보안 프레임워크 (Framework) 연구

이상도(SangDo Lee),신용태(Yongtae Shin) 인문사회과학기술융합학회 2018 예술인문사회융합멀티미디어논문지 Vol.8 No.4

지난 몇년간 발생된 수많은 정보시스템 해킹중 국가적 위험을 불러일으킬만한 사이버공격은 핵시설과 원전에 대한 사이버공격일것이다. 그중 대표적인 것이 이란 핵시설 스턱스넷 공격과 한국의 한 수원 사이버위협이라고 할 수 있다. 전자는 직접적인 사이버공격으로 인해 원전이 멈출 수 있다는 것을 보여주었고, 후자는 사이버해킹 위협만으로도 국민을 공포에 떨게 할 수 있다는 것을 보여주었다. 이 사건들 이후 산업 제어시설에 대한 사이버공격 위험성이 알려져서 보안이 강화되기 시작하였다. 원전 발전소도 이전의 소극적인 인터넷과 분리된 네트워크로 안전하게 운영된다는 개념에서 벗어나서 악성코드 등 사이버테러로 인해 공격을 받을 수 있다는 개념으로 변했다. 두 가지 개념의 차이점은 제어시설도 사이버공격으로 침해될 수 있다는 가능성에 기초하여 대응하기 위한 전략으로 세워졌다는 것이다. 그 점에서 미국은 이미 제어시설에 대한 보안프레임워크를 설정하여 대비하고 있다. 본 논문에서는 제어시설에 대한 사이버보안 공격사례 및 공격 시나리오를 식별하고, 각 시나리오별로 위험요소에 대한 대처방안을 분석한다. 이를 통해 국내 보안프레임워크 설계시 참조해야할 사항을 식별하여 보안성을 강화하고 설계시 안정성을 확보하고자 한다. Among many hacking attempts carried out in the past few years, the cyber-attacks that could have caused a national-level disaster were the attacks against nuclear facilities including nuclear power plants. The most typical one was the Stuxnet attack against Iranian nuclear facility and the cyber threat targeting one of the facilities operated by Korea Hydro and Nuclear Power Co., Ltd (Republic of Korea; ROK). Although the latter was just a threat, it made many Korean people anxious while the former showed that the operation of nuclear plant can be actually stopped by direct cyber-attacks. After these incidents, the possibility of cyber-attacks against industrial control systems has become a reality and the security for these systems has been tightened based on the idea that the operations by network-isolated systems are no longer safe from the cyber terrorism. The ROK government has established a realistic control systems defense concept and in the US, the relevant authorities have set up several security frameworks to prepare for the threats. This paper presented various cyber security attack cases and their scenarios against control systems, along with the analysis of countermeasures for them. Though this task, we attempt to identify the items that need to be considered when designing a domestic security framework to improve security and secure stability.