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최명수,이지은 한국품질경영학회 2022 한국품질경영학회 학술대회 Vol.2022 No.1
사람 간 직접적인 접촉 없이 거래가 이뤄지기 위해서는 상대방의 신원이 확인되어야 하며 거래의 신뢰성에 대한 검증이 이뤄져야 한다. 이러한 문제를 해결하기 위해 블록체인 기술을 활용하고 있어 블록체인 기술은 비대면 거래의 핵심 기술로 떠오르고 있다. 블록체인 기술은 교육이 당면한 문제를 해결하고 새로운 비즈니스 기회를 창출하는 데에도 기여한다. 블록체인 기술을 통해 학습 데이터의 안정성과 투명성, 신뢰성을 확보할 수 있고, 플랫폼에서 모든 정보를 독점하는 정보 비대칭성 문제를 해결할 수 있으며, 가짜 학위나 자격증, 인증서를 식별하는 데에도 유용하다. 또한 학습 성과를 직관적으로 보여주고 투명하게 관리하는 디지털 뱃지의 생성과 유통, 관리에 블록체인 기술을 적용함으로써 디지털 뱃지의 신뢰성과 활용도를 높일 수 있을 것으로 예상된다. 본 연구에서는 교육기관에서 발행하는 디지털 뱃지의 위변조를 방지하고 관리를 용이하게 하는 블록체인 기반 디지털 뱃지 서비스 플랫폼 구축 전략을 소개하고자 한다. 해외에서는 블록체인 기반 교육 서비스의 상용화가 이뤄지고 있으나 아직 국내 시장은 필요성에 대한 공감이 형성된 도입기 단계로, 향후 디지털 뱃지의 폭발적인 수요에 대비한 플랫폼 구축은 필수적이다. 해당 사례를 통해 교육 분야의 블록체인 적용 방안과 최근 이슈가 되고 있는 디지털 뱃지 활성화에 대한 인사이트를 제공할 수 있기를 기대한다.
전달강성계수법에 의한 왕복 기계 축계의 비틀림진동 응력해석
최명수 한국소음진동공학회 2004 한국소음진동공학회 논문집 Vol.14 No.8
While designing shafting in reciprocating machines with internal combustion engines which derive generators, pumps, and vehicles, it is very important to calculate the additional stress of shafting by torsional vibration. In this paper, the transfer stiffness coefficient method which is based on the successive transfer of stiffness coefficient was applied to the calculation of the additional stress of shafting in reciprocating machine by torsional vibration. In order to confirm the effectiveness of the present method, a propulsion shafting with a diesel engine in a vessel was considered as the computational example of shafting in reciprocating machine. The results calculated by the present method were compared with those of the modal analysis method, the mechanical impedance method, and free vibration analysis.
유한요소-전달강성계수법을 이용한 평판 구조물의 강제진동해석
최명수 한국소음진동공학회 2003 한국소음진동공학회 논문집 Vol.13 No.2
The finite element method(FEM) is the most widely used and powerful method for structural analysis. In general, in order to analyze complex and large structures, we have used the FEM. However, it is necessary to use a large amount of computer memory and computation time for solving accurately by the FEM the dynamic problem of a system with many degree-of-freedom, because the FEM has to deal with very large matrices in this case. Therefore, it was very difficult to analyze the vibration for plate structures with a large number of degrees of freedom by the FEM on a personal computer. For overcoming this disadvantage of the FEM without the loss of the accuracy, the finite element-transfer stiffness coefficient method(FE-TSCM) was developed. The concept of the FE-TSCM is based on the combination of modeling technique in the FEM and the transfer technique in the transfer stiffness coefficient method(TSCM). The merit of the FE-TSCM is to take the advantages of both methods, that is, the convenience of the modeling in the FEM and the computation efficiency of the TSCM. In this paper, the forced vibration analysis algorithm of plate structures is formulated by the FE-TSCM. In order to illustrate the accuracy and the efficiency of the FE-TSCM, results of frequency response analysis for a rectangular plate, which was adopted as a computational model, were compared with those by the modal analysis method and the direct analysis method which are based on the FEM.
유한요소-전달강성계수법을 이용한 골조 구조물의 과도응답해석
최명수,문덕홍,김성진 한국소음진동공학회 2002 한국소음진동공학회 논문집 Vol.12 No.9
In order to decrease remarkably the computation time and storage used in the direct integration method without the loss of accuracy, authors suggest a new transient analysis algorithm. This algorithm is derived from the combination of three techniques, that is, the transfer technique of the transfer stiffness coefficient method, the modeling technique of the finite element method, and the numerical integration technique of the Newmark method. In this paper, the transient analysis algorithm of a frame structure is formulated by the proposed method. The accuracy and computation efficiency of the proposed method are demonstrated through the comparing with the computation results by the direct integration method for three computation models under various excitations.
Risperidone과 Fluoxetine의 병합요법으로 치료된 정신분열병 환자의 강박행동
최명수,정상근,황익근 대한정신약물학회 2002 대한정신약물학회지 Vol.13 No.1
Recent studies have reported that obsessive-compulsive(OC) symptoms is highly prevalent in schizophrenia, and schizophrenic patients with OC symptoms have a poorer clinical course compared to those without OC symptoms. In spite of previous many case reports, treatment of OC symptoms in schizophrenia have not been systematically studied. We report a patient with chronic schizophrenia who had obsessive symptoms such as bizzare, stereotyped behaviors. Treatment with olanzapine and risperidone, resulted in partial response for his psychotic symptoms, respectively. The obsessive symptoms, however, persisted and fluoxetine was added to the risperidone regimen. After 4 weeks of combination treatment, fluoxetine was titrated up to 80mg/day and his obsessive symptoms became less frequent and intense. After 7 weeks on combination treatment of risperidone and fluoxetine, resulted in a significant reduction in obsessive symptoms. On the 20 months, He remained markedly and was been treated with risperidone, 4mg/day, and fluoxetine 20mg/day.