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CSA계 팽창재를 대체한 고강도 SHCC의 역학적 특성
송영재,민병성,양해준,김성호,윤현도 한국구조물진단유지관리학회 2011 한국구조물진단학회 학술발표회논문집 Vol.2011 No.9
This paper is to investigate the influence of high compressive strength of SHCC and the mechanical properties of expensive admixture-SHCC. As a result of test, PE100-10 specimens recommended to from mechanical properties of compressive, tensile test.
송영재,강수원,양해준,김성호,윤현도 한국구조물진단유지관리학회 2011 한국구조물진단학회 학술발표회논문집 Vol.2011 No.9
This paper is to investigate the influence of SHCC and RC beams (prepared without EXA or with EXA) has been compared through flexural of beams measurements. A synergistic effect on the strain-hardening and deflection has been observed when the EXA have been used.
혁신도시가 지역의 경제적 자족성에 미친 영향 분석 연구
송영재(Young-Jae Song),김지엽(Jeeyeop Kim) 한국생활환경학회 2020 한국생활환경학회지 Vol.27 No.6
In this study, we wanted to analyze the impact of Innovation Cities created for sustainable development on the economic self-sufficiency of the region. The targets of the analysis were limited to eight Innovation Cities, excluding the Busan Innovation District and Jeju Innovation City, among the 10 Innovation Cities in Korea. To this end, the change in economic self-help stones was analyzed using commuting OD data from 10 regions where eight Innovation Cities were located. The results were as follows First, the creation of an Innovation City confirmed that the region was growing into an economic hub. This is believed to be the increase in the proportion of jobs that secure jobs and create high value-added jobs in the region, as the creation of industrial, academic, and annual clusters, a key strategy for creating Innovation Cities, has been the result of surrounding industries. Second, there is a phenomenon of separation of directives in Innovation City areas. Industrial, academic, and annual clusters have become a base for integrating industries by providing new locations to companies in the surrounding region, and as a result, it is believed that the separation of workers in and outside the region is occurring. Third, it was confirmed that the relocation of public institutions contributed to strengthening economic self-sufficiency in the early Innovation City areas. Although the relocation period is not much different from the time when apartments were moved in, it is believed that the newly formed economic hub of former public institution workers in the region contributed to the economic conditions of the region.
ResNet 정확도 향상을 위한 깊이별 Residual Connection 비율 조절 방법 제안
송영재(Youngjae Song),장승우(Seungwoo Jang),김광수(Kwangsu Kim) 한국지능시스템학회 2021 한국지능시스템학회논문지 Vol.31 No.4
ResNet은 residual learning으로 학습 최적화를 용이하게 만들어 gradient vanishing과 상관없이 신경망이 깊어질 때 성능이 하락하는 degradation 문제를 해결한다. 하지만 기존 ResNet에서는 모든 residual block에 동일한 비율로 residual connection을 적용하여 residual learning의 최적화 효과를 극대화하지 못하는 한계가 있다. 따라서 본 논문에서는 residual learning의 최적화 효과를 극대화하기 위해 깊이 별 residual connection 비율을 달리하여 ResNet 정확도를 향상시키는 variational scaling 방법을 제안한다. 성능을 검증하기 위해 두가지 다른 데이터셋인 CIFAR-10과 CIFAR-100에서 다른 깊이를 갖는 ResNet-32, ResNet-56를 사용해 실험을 수행한다. 실험 결과 모든 케이스에서 기존 ResNet과 비교하여 연산량 증가 없이 정확도 향상을 이룬다. ResNet resolves a degradation problem by residual learning which allows ease to the learning optimization. However, original ResNet has such a limitation that do not maximize the optimization of residual learning by applying residual connections with the constant scale. This paper suggests a variational scaling method that adjusts scales of residual connection by depth in order to maximize the optimization effect of residual learning hence to enhance the model accuracy. Experiments are conducted in two different datasets CIFAR-10 and CIFAR-100, and with 2 models with different depth, ResNet –32 and ResNet-56. As the result of experiments, the variational scaling method enhanced accuracy without the computational amount increased compared to the original ResNet in all cases.
송영재(Song Young-Jae),김성호(Kim Sung-Ho),류승현(Ryu Seung-Hyun),양해준(Yang Hae-Jum),김준수(Kim June-Su),강수원(Kang Su-Won),윤현도(Yun Hyun-Do) 대한건축학회 2011 대한건축학회 학술발표대회 논문집 - 계획계/구조계 Vol.31 No.2(구조계)
Strain-hardening cement-based composite(SHCC) are materials with strain hardening behavior through energy dissipation. It is concerned that initial shrinkage crack of SHCC due to the rich mixture. In SHCC, chemical shrinkage is larger than drying shrinkage due to using a large amount of W/B, and this is a factor deteriorating the quality of structures. Therefore, EXA has been suggested to improve SHCC performance in terms of lower risk of cracking related to shrinkage. SHCC and RC beams (prepared without EXA or with EXA) has been compared through flexural of beams measurements. A synergistic effect on the strain-hardening and deflection has been observed when the EXA have been used.
베이직 언어를 쉽게 배우기 위한 BPME시스템 설계 및 구현에 관한 연구
송영재(Youngjae Song),홍혜자(Hyeja Hong) 한국정보과학회 1989 한국정보과학회 학술발표논문집 Vol.16 No.1
프로그램 언어를 배우는 데 있어서 가장 어려운 점은 그 언어의 개념을 이해하는데 있다. 따라서 프로그램 언어를 가르치는 데 있어서 가장 중요한 작업중의 하나는 그 언어의 문장과 구문, 제어순서, 화일조작 등과 같은 그 언어의 구조에 대한 이해이다. 본 논문은 화일을 사용하지 않은 베이직 프로그램의 실행과정과 변수들의 변화되는 과정을 화면을 통해 실험해 볼 수 있는 베이직 CAI 프로그램(BPME : Basic Program Made Easier)을 C언어로 구현하였다.