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안성수,박채정,김수연,한경화,김다인,박예원,장종희,김세훈,이승구 연세대학교의과대학 2024 Yonsei medical journal Vol.65 No.5
Purpose: Lower-grade gliomas of histologic grades 2 and 3 follow heterogenous clinical outcomes, which necessitates risk stratification. This study aimed to evaluate whether diffusion-weighted and perfusion-weighted MRI radiomics allow overall survival (OS) prediction in patients with lower-grade gliomas and investigate its prognostic value. Materials and Methods: In this retrospective study, radiomic features were extracted from apparent diffusion coefficient, relative cerebral blood volume map, and Ktrans map in patients with pathologically confirmed lower-grade gliomas (January 2012–February 2019). The radiomics risk score (RRS) calculated from selected features constituted a radiomics model. Multivariable Cox regression analysis, including clinical features and RRS, was performed. The models’ integrated area under the receiver operating characteristic curves (iAUCs) were compared. The radiomics model combined with clinical features was presented as a nomogram. Results: The study included 129 patients (median age, 44 years; interquartile range, 37–57 years; 63 female): 90 patients for training set and 39 patients for test set. The RRS was an independent risk factor for OS with a hazard ratio of 6.01. The combined clinical and radiomics model achieved superior performance for OS prediction compared to the clinical model in both training (iAUC, 0.82 vs. 0.72, p=0.002) and test sets (0.88 vs. 0.76, p=0.04). The radiomics nomogram combined with clinical features exhibited good agreement between the actual and predicted OS with C-index of 0.83 and 0.87 in the training and test sets, respectively. Conclusion: Adding diffusion- and perfusion-weighted MRI radiomics to clinical features improved survival prediction in lowergrade glioma.
박원형 ( Wonhyung Park ),안성진 ( Seongjin Ahn ) 한국정보처리학회 2017 정보처리학회논문지. 컴퓨터 및 통신시스템 Vol.6 No.7
사이버 위협이 고도화되고 지능화되어짐에 따라 사이버 침해사고로 인한 피해사례가 급격하게 증가하고 있다. 이로 인해 사이버보안 전문인력의 중요성을 인식하여 다수의 사이버 보안관련 교육 프로그램이 운영되고 있지만 사이버보안 인력 현황 및 직무에 기반한 사이버보안 교육연구가 이루어지 않아서 교육 수요자 및 공급자가 목표한 교육과정이 제공되지 않고 있다. 이에 따라 본 연구에서는 사이버보안 인력 및 지식체계를 정의하고 이를 반영한 새로운 사이버보안 교육 커리큘럼을 개발하였다. 본 연구에서 개발한 교육 커리큘럼은 기존 교육커리큘럼에서 강조하고 있는 방어와 관련된 교육내용만으로 구성하는 것이 아니라, 공격분야의 교육내용을 추가하여 전문적이고 균형적인 사이버보안 인력양성을 위한 교육 커리큘럼을 개발 및 개선하였다. As the cyber threats become more sophisticated and intelligent, the cases of cyber-infringement accidents are rapidly increasing. As a result, awareness of the importance of cyber security professionals has led to many cyber security-related educational programs. These programs provided with education curriculum aimed because cyber security workforce and job-based cyber security education research are not properly done. In this study, we developed a new cyber security education curriculum that defines and reflects cyber security personnel and knowledge system. In this study is not composed solely of the education contents related to the defenses emphasized in the existing education curriculum, but developed education curriculum to train a professional and balanced cyber security manpower by adding education contents in the attack field.
Computational Thinking 능력이 소프트웨어 개발에 미치는 영향에 관한 연구
박성빈 ( Seongbean Park ),안성진 ( Seongjin Ahn ) 한국컴퓨터교육학회 2015 컴퓨터교육학회 논문지 Vol.18 No.5
최근 정부와 산업계에서는 국가경쟁력의 핵심요소로 강조되고 있는 소프트웨어의 경쟁력을 강화해야한다는 요구가 증가하고 있으며 이를 위해서는 소프트웨어를 개발하는 소프트웨어 개발자들의 직무능력 향상이 필요하다고 할 수 있다. 본 연구결과 창의적 문제해결방법인 Computational Thinking이 소프트웨어 개발자들의 직무능력 향상에 긍정적인 영향을 준다는 점과 기존연구결과와는 다르게 소프트웨어 개발이라는 업무적 특성으로 인해 simulation, algorithms & procedures, parallelization 등이 소프트웨어개발자들에게 영향력 있는 요소로 나타났으며 직무능력 향상을 위해서는 이에 대한 교육이 강조될 필요가 있다. 이중에서 특히 simulation이 가장 큰 영향을 주기에 이에 대한 강화가 필요하다고 할 수 있다. There has been rising demand within the South Korean government and among various industries in recent years on the need for strengthening the competitiveness of the software industry, which they highlight as being a core element for national competitiveness. This strategy would require enhancing the job competency of software developers. This study’s results show that computational thinking (CT), which is one of the more creative solutions to the problem, has a positive effect on the enhancement of software developers’ job competency. Furthermore, the study finds that the software development tasks of simulation, algorithms and procedures, and parallelization (in that order) serve as influential elements for software developers, which differs from previous studies’ findings. The South Korean government thus should emphasize education in these areas in order to enhance the nation’s job competence. Because simulation, especially, has the greatest influence among these areas, there is a particular need to strengthen that area.