2011년 북한이탈주민 경제활동 실태

송창용 남북하나재단 2011 실태조사 Vol.2011 No.0

해양자동채염기의 최소중량설계를 위한 메타모델 기반 근사최적화

송창용 중소기업융합학회 2021 융합정보논문지 Vol.11 No.1

본 논문에서는 해양자동채염기의 구조중량 최소화를 위해 구조설계에 대한 메타모델 기반 근사최적화를 수행하 였다. 구조해석은 해양자동채염기의 초기설계에 대한 강도성능을 평가하기 위해 유한요소법을 이용하여 수행하였다. 구 조해석에서는 설계하중조건에 대한 강도성능을 평가하였다. 최적설계문제는 강도성능 제한조건을 만족하면서 중량을 최소화할 수 있는 구조두께의 설계변수를 결정하도록 정식화하였다. 근사최적화에는 반응표면법, 크리깅 모델 및 체비쇼 프 직교 다항식의 메타모델을 사용하였다. 수치계산 특성을 검토하기 위해 근사최적화 결과는 비근사최적화 결과와 비 교하였다. 근사최적화에 사용된 메타모델 중 체비쇼프 직교 다항식이 해양자동채염기의 구조설계에 가장 적합한 최적설 계 결과를 나타내었다. In this paper, the meta-model based approximate optimization was carried out for the structure design of an ocean automatic salt collector in order to minimize the structure weight. The structural analysis was performed by using the finite element method to evaluate the strength performance of the ocean automatic salt collector in its initial design. In the structural analysis, it was evaluated the strength performance of the design load conditions. The optimum design problem was formulated so that design variables of main structure thickness would be determined by minimizing the structure weight subject to strength performance constraints. The meta-models used in the approximate optimization were the response surface method, Kriging model, and Chebyshev orthogonal polynomials. Regarding to the numerical characteristics, the solution results from approximate optimization techniques were compared to the results of non-approximate optimization. The Chebyshev orthogonal polynomials among the meta-models used in the approximate optimization showed the most appropriate optimum design results for the structure design of the ocean automatic salt collector.

패러독스경영 프로세스를 통한 신학습법의 도출

송창용 한국산업경영시스템학회 2014 한국산업경영시스템학회 학술대회 Vol.2014 No.춘계

This study is to propose the paradox management process to analysis and solve the public education's dilemma between the standardized education and the personalized education. The process is based on combining the TOC(Theory Of Constraints) and TRIZ(Russian Theory of Inventive Problem Solving), which is a creative way of thinking to draw the synergic effect by pursuing simultaneously the conflicting elements. Through this research, a new concept of learning method can be suggested on a public course.

Multi-class Data Description 기반의 웨이퍼 빈 맵 불량 패턴 분류 및 신규 불량 패턴 검출방법

송창용,정영선,김병훈 대한산업공학회 2022 대한산업공학회지 Vol.48 No.3

In the semiconductor manufacturing process, electrical die sorting(EDS) test is a process to check whether the individual chips have reached the desired quality level by performing electrical property inspection on each semiconductor chip on a wafer. After performing the EDS test, a human expert can check the spatial defect pattern of wafer bin map(WBM) that displays the defectiveness of each chip. Since the defect patterns of WBMs are analyzed to trace back the processes and facilities for root cause analysis, it is very important to classify the WBM defect patterns. Because most existing studies use a classification model that trains predefined defect patterns, there is a limitation in that it cannot detect a new defect pattern that is not included in the training dataset. In this study, a method for classifying predefined defect patterns and detecting undefined defect patterns is proposed based on the multi-class data description model. As a result of the evaluation using actual WBM data, it was confirmed that it has excellent performance in classifying existing defect patterns and detecting new defect patterns.

비만 청소년의 비만관리 프로그램 체험에 관한 사례연구

송창용,정구인 한국교원대학교 학교체육연구소 2008 학교체육연구소지 Vol.15 No.1

The purpose of this study was to provide fundamental data needed for running overweight management programs at schools through the analysis of the change of students' life habits and psychological status by applying those programs to them co-conducted by

기업의 핵심역량에 관한 인식 연구

송창용,손유미,서명희 핵심역량교육학회 2018 핵심역량교육연구 Vol.3 No.2

Analyzed the key competencies for HR managers and employees. First, even when considering the size of the workplace, HR managers perceived that core competencies are more important than workers. Second, regardless of the size of the workplace, HR personnel perceived interpersonal competence as the most important, while workers thought that communication capacity was the most important. Third, both HR managers and workers thought that global competence was less important. Fourth, the importance of core competencies differed by industry. Fifth, in the future, K-CESA should consider supporting core competency groups rather than individual core competencies. In addition, although the ratio of recognizing changes in the company due to the Fourth Industrial Revolution is low, it offers diverse competencies in the capacity needed during the Fourth Industrial Revolution era. 본 연구는 기업인사담당자와 근로자가 중요하다고 인식하는 핵심역량간의 차이를 업종, 규모, 시장전략 등에 따라 살펴봄으로써 핵심역량에 대한 기업의 인식을 분석해보는데 시사하는 바가 크다고 할 수 있다. K-CESA 6대 핵심역량을 업종, 규모를 고려하여 기업인사담당자와 근로자 각 300명을 표본 추출하여 조사하였으며, 조사방법은 온라인 조사를 활용하였다. 설문조사 내용은 기업과 근로자 배경변인, 6대 핵심역량의 중요도로 구성하였다. 핵심역량에 대한 인사담당자와 근로자의 핵심역량 인식은 다음과 같이 나타났다. 직장 규모에 상관없이 인사담당자가 근로자보다 핵심역량을 더 중요하다고 인식하고 있다. 단, 근로자의 경우 직장 규모에 따라 핵심역량 중요도 인식에 차이가 있는데, 직장 규모가 클수록 핵심역량을 중요하게 인지하고 있다. 인사담당자는 직장 규모에 상관없이 대인관계역량을 가장 주요한 역량으로 인식하고 있고, 근로자는 의사소통역량을 가장 중요하게 여기고 있으며, 글로벌역량은 기업인사담당자와 근로자 모두 우선순위를 낮게 인식하고 있다. 인사담당자는업종별로 순위에 차이는 있으나 대인관계역량과 의사소통역량, 자기관리역량을 중요한 역량으로 평가하고 있다. 위 결과를 활용하여 대학에서 K-CESA 진단 시, 개별 역량보다 주요 역량군으로 접근하여 진단영역을 제시하는 방안을 고려할 수 있다. 즉 학생이 취업을 목적으로 하는 업종과 규모를 고려하여, 해당 업종과 규모의 인사담당자가 중요하게 생각하는 역량군을 진단영역으로 설정하고, 이에 맞는 맞춤식 역량기반 교육과정을 설계할 수 있다.

공교육 딜레마 해결을 위한 신교수법 설계 : 패러독스 경영 프로세스를 통한 분석

송창용 한국산업경영시스템학회 2014 한국산업경영시스템학회지 Vol.37 No.4

This study is to solve the public education's dilemma between the standardized education to maximize learning efficiency and the personalized education to maximize learning effectiveness, using the paradox management process. The process is based on combining the TOC (Theory Of Constraints) and TRIZ (Russian Theory of Inventive Problem Solving), which is a creative way of thinking to draw the synergic effect by pursuing simultaneously the conflicting elements. Through this research, a new concept of learning method can be suggested on a public course. Further research should be performed to develop a learning guideline based on the students' empirical study results.

反復燒成時 陶材와 金屬 界面의 成分元素 分布

宋暢鏞,宋匡燁,朴贊云 全北大學校 齒醫學硏究所 1987 전북치대논문집 Vol.5 No.1

The repeated firings of metal-porcelain system is thought to affect adhesive force and esthetics due to being increased oxide layer and elemental diffusion. But, some authors suggested that it was not affected by repeated firings. This study investigates the relationships among repeated firings, the thickness of oxide layer and elemental distribution. For this purpose, 12 samples were made of Vera-bond alloy and Ceramco porcelain. These samples were fired according to manufacturer's recommendation and repeated firings were carried out 6 times in turn at grazing temperature. Four samples of them were etched by 10% H_2So_4 and alalyzed by SEM and WDAX, And 8 samples were analyzed by Scanning Electron Mlcroscope, EDAX(Energy Dispersive Analysis of X-ray), and WDAX(Wavelength Dispersive analysis of X-ray), The obtained results were as follows ; 1. There was no distinguishable chang in the thickness of oxide layer in interface, but it was increased in backside of metal matrix according to repeated firings. 2. The diffusion profiles of Ni and Cr were not altered approximately by repeated firings. 3. The diffusion profiles of Sn in porcelain were showed that it was concentrated near the interface according to increased times of firings, and that of Si was similar to that of Sn. 4. In properly etched samples, a distinct oxide layer was observed by SEM but it was difficult to. distinguish oxide layer from matal matrix in unetched samples. 5. The elemental diffusion of oxide layer in porcelain was produced partially.

극 분해 이론을 활용한 MPM기반의 입자 회전 애니메이션

송창용,김기훈,김선정,김창헌 (사)한국컴퓨터그래픽스학회 2022 컴퓨터그래픽스학회논문지 Vol.28 No.4

In this paper, we propose a single framework based on the MPM(Material Point Method) that can represent the dynamic angular motion of the elementary particle unit. In this study, the particles can have various shapes while also describing linear and angular motion. As a result, unlike other particle-based simulations, which only represent linear movements of spherical (e.g. Circle, Sphere) particles, it is possible to express the visually dynamic motion of them. The proposed framework utilizes MPM, due to the fact that rotational motion can be decomposed and derived from large deformation. During the integration process of the presented technique, a deformation gradient tensor is decomposed by polar decomposition theory for extracting rotation tensor. By applying this together with the linear motion of each particle, as a result, it is possible to simultaneously express the angluar and linear motion of the particle itself. To verify the proposed method, we show the simulation of rotating particles scattering in the wind field, and the interaction(e.g. Collision) between a moving object and them by comparing the traditional MPM 본 논문에서는 최소 입자 단위의 역동적인 회전 움직임을 나타낼 수 있는 MPM(Material Point Method) 기반 단일 프레임워크를 소개한다. 우리가 표현하고자 하는 입자는다양한 형상(Shape)을 가질 수 있음과 동시에, 선형(Linear momentum), 회전(Angular momentum) 운동을 함께 묘사할 수 있다. 그 결과 기존 구형 입자의 선형 움직임만을 나타내던 입자 기반 시뮬레이션과는달리, 시각적으로 단일 입자의 역동적인 모습을 표현할 수 있다. 제안하는 프레임워크는 회전 운동을 큰 변형(Large Deformation)으로부터 분해 및 추출 할 수 있다는 점에서 MPM을 활용하였다. 본 기법은 MPM 적분 과정 중 계산되는 변형구배텐서(Deformation Gradient Tensor)를극분해(Polar Decomposition)하는과정을통해회전텐서(Rotation Tensor)를추출하고,각입자의선형운동과함께이를적용하여결과적으로입자자체의회전,선형운동을동시에표현하는것이가능하다. 본 연구에서는 제안하는 기법의 검증을 위해 바람에 흩날리며 회전하는 입자의 모습 및 움직이는 물체와 정지한 입자간의상호작용 시뮬레이션을 기존 MPM을이용한 시뮬레이션과의 비교를 통해 진행하였다.

직교배열실험을 이용한 자동채염기 구조설계의 민감도해석과 대리모델 비교 연구

송창용,이동준 중소기업융합학회 2020 융합정보논문지 Vol.10 No.7

본 논문은 다양한 설계하중조건 상태에서 자동채염기 구조설계의 성능분석과 개선을 위해 실험계획법을 이용 한 설계민감도 평가와 대리모델의 특성에 대한 비교연구를 수행하였다. 실험계획법은 수치해석 기반의 직교배열설계 방법을 이용하였다. 설계인자는 주요 구조부재의 두께치수 변수를 고려하였고, 응답치는 중량과 강도성능을 선정하였 다. 직교배열실험을 통해 설계인자 별 응답치에 대한 정량적인 영향도를 분석하였다. 또한 최소의 중량증감으로 구조 성능을 개선할 수 있는 최적의 설계조건을 탐색하였다. 직교배열실험 결과를 이용하여 반응표면모델, 크리깅모델, 그 리고 체비쇼프 직교 다항식과 같은 다양한 대리모델을 생성하였다. 대리모델의 결과를 통해 직교배열실험 결과의 타 당성을 검증하였다. 자동채염기 구조설계 공간 탐색에는 반응표면모델이 가장 적합한 대리모델로 평가되었다. The paper deals with comparative study of characteristics of surrogate models and sensitivity evaluation using design of experiments in order to enhance and analysis the structure design of an automatic salt collector under various design load conditions. Orthogonal array design based on numerical analysis was used for the design of experiments. The thickness sizing variables of main structure member were considered the design factors, and the output responses were selected from the strength performances as well as the weight. The quantitative effects on responses for each design factor were evaluated from the orthogonal array experiment. Optimum design case was also identified to improve the strength performances with weight minimization. Using the orthogonal array experiment. various surrogate models such as response surface model, Kriging model, and Chebyshev orthogonal polynomial were generated. The orthogonal array experiment results were validated by the surrogate modeling results. The most suitable surrogate model was the response surface model for the exploration of design space of the automatic salt collector.