고강도 고인성 마그네슘 합금 개발동향

박은수,김재우,김도향 ( Eun Soo Park,Jae Woo Kim,Do Hyang Kim ) 한국주조공학회 1998 한국주조공학회지 Vol.18 No.2

Mg-Zn-Y 합금에서 준결정 및 준결정 유사상

박은수,옥재범,김원태,김도향,Park, Eun-Soo,Ok, Jae-Bum,Kim, Won-Tae,Kim, Do-Hyang 한국현미경학회 2002 Applied microscopy Vol.32 No.1

As-cast microstructure of Mg-rich $Mg_{68}Zn_{28}Y_4$ has been investigated by a detailed transmission electron microscopy. The as-cast $Mg_{68}Zn_{28}Y_4$ alloy consisted of three different types of phases: $10{\sim}20{\mu}m$ size primary solidification phase, dendritic phase grown from the primary phase and a eutectic structure formed at the later stage of solidification. The primary solidification phase has an icosahedral structure with a large degree of phason strain. 1/1 rhombohedral approximant phase with lattice parameters: $a=27.2{\AA}\;and\;{\alpha}=63.43^{\circ}$ is first observed in Mg-Zn-Y system. The rhombohedral structure can be obtained by introducing phason strain in the six dimensional face centered hyper-cubic lattice. The decagonal phase nucleates with orientation relationship with the icosahedral phase, and $Mg_4Zn_7$ nucleates with orientation relationship with the decagonal phase, indicating a close structural similarity between the three phases. Gradual depletion of Y during solidification plays an important role in heterogeneous nucleation of decagonal and $Mg_4Zn_7$ phases from icosahedral and decagonal phases respectively. [ $Mg_{68}Zn_{28}Y_4$ ] 합금의 응고 조직은 primary solidification phase, primary solidification phase로부터 성장된 ${\alpha}-Mg$ dendrite, 그리고 응고 말기에 형성된 eutectic structure의 세 가지형태 조직으로 구성되어져 있다. Primary solidification phase에는 매우 큰 정도의 phason strain이 존재하고 있으며, $a=27.2{\AA}\;and\;{\alpha}=63.43^{\circ}$의 격자상수를 갖는 1/1 rhombohedral approximant가 존재한다. 이와 같은 rhombohedral approximant의 구조는 six dimensional face centered hyper-cubic lattice에 phason strain을 도입함에 의해 얻어질 수 있다. Decagonal phase는 icosahedral phase로부터 방위 관계를 가지며 형성되며, $Mg_4Zn_7$는 decagonal phase로부터 방위관계를 가지며 성장한다. 이는 세 상간에 구조적 유사성이 존재하고 있음을 의미하며, 응고시 용질원자의 분배에 의해 이들 세 상이 순서대로 형성되어진다.

족압검사를 이용한 만성 발목 불안정성과 압력중심의 연관성

박은수,서상교,이호승,Park, Eun Soo,Seo, Sang Gyo,Lee, Ho Seong 대한족부족관절학회 2020 대한족부족관절학회지 Vol.24 No.1

Purpose: Chronic ankle instability is a very common abnormality of the ankle, but there is still controversy regarding its evaluation criteria. The stress view has difficulties in reflecting the patient's symptoms and treatment progress. Therefore, this study examined the relationship between the center of pressure (COP) measured by a pedobarograph and the symptoms of the patient. Materials and Methods: Thirty patients with chronic ankle instability from February to August 2018 were included. Each patient was surveyed with the foot and ankle outcome score (FAOS). The COP was measured with a foot pressure scanner, and the travel distance and ellipse area of the COP were calculated. Each patient was measured on one foot and on two feet with his or her eyes closed and open. The relationship between the COP measurement and FAOS score was analyzed using the Pearson correlation coefficient. Results: The participants were consisted of 21 male and nine female, with a mean age of 30 years, mean weight of 72 kg, and mean foot size of 259 mm. With the eyes open, the correlation coefficient between the FAOS and travel distance of the affected side was -0.394 (p<0.05) and that between the FAOS and the ellipse area of the affected side was -0.425 (p<0.05). On the other hand, no significant correlations were found between the travel distance and ellipse area of the affected side when patients closed their eyes. Conclusion: Measurement of the COP using foot pressure scanner could evaluate objectively patients with chronic ankle instability, with measurements in patients with their eyes open being more significant. Based on the findings of this study, an analysis of the COP with the patients with their eyes open and standing on one foot may help determine the management strategy and assess the progress of the patients.

그림자 제거와 색도 히스토그램 비교를 이용한 배회행위 검출

박은수,이형호,윤명규,김민규,곽종훈,김학일,Park, Eun-Soo,Lee, Hyung-Ho,Yun, Myoung-Kyu,Kim, Min-Gyu,Kwak, Jong-Hoon,Kim, Hak-Il 한국정보보호학회 2011 정보보호학회논문지 Vol.21 No.6

본 논문에서는 감시영역을 벗어난 후 다시 돌아온 객체에 대한 배회행위를 효과적으로 인식 할 수 있는 지능형 배회행위 검출 시스템을 제안한다. 전경과 배경을 가우시안 혼합 모델을 이용하여 분리하고 그림자를 제거하여 객체를 인식한 후, 객체의 색도 히스토그램을 이용하여 감시영역을 벗어난 후 돌아온 객체들을 판단하고 감시영역에 존재하는 시간을 보전한다. 배회행위를 판단하기 위해 카메라 캘리브레이션을 통해 실세계 배회패턴과 같은 행태의 매크로 블록을 영상좌표에 도입한 후 배회궤적을 추출하고, 감시영역에 객체가 존재하는 시간을 함께 고려하여 배회행위를 판단한다. 제안하는 방법은 실험에 사용된 모든 배회행위 프레임에서 정확하게 배회행위를 검출하여 그 효과를 입증하였다. Proposed in this paper is the intelligent video surveillance system to effectively detect multiple loitering objects even that disappear from the out of camera's field of view and later return to a target zone. After the background and foreground are segmented using Gaussian mixture model and shadows are removed, the objects returning to the target zone is recognized using the chromaticity histogram and the duration of loitering is preserved. For more accurate measurement of the loitering behavior, the camera calibration is also applied to map the image plane to the real-world ground. Hence, the loitering behavior can be detected by considering the time duration of the object's existence in the real-world space. The experiment was performed using loitering video and all of the loitering behaviors are accurately detected.

금속 비정질 재료의 기초 및 응용 시리즈 II

박은수,Park, Eun-Soo 한국주조공학회 2009 한국주조공학회지 Vol.29 No.4

공공건설사업 이해관계자를 고려한 정책적 의사결정 및 사회적 갈등 요인에 관한 연구

박은수(Park, Eun Soo),권기욱(Kwon, Ki Uk),안경섭(An, Kyung Seob) 한국전시산업융합연구원 2018 한국과학예술융합학회 Vol.35 No.-

최근 몇 년 동안 동남권 신공항 입지 선정, 밀양 송전탑 건립 반대 등의 지역갈등은 공익을 무시한 채 님비와 핌피 등 지역의 집단이기주의로 비화되어 과도한 소모전과 재정 낭비의 문제를 초래하고 있다. 정부 차원의 공공건설사업에 대한 이해의 폭을 넓혀 지역갈등을 예방하고 발생한 갈등을 효율적이고 합리적으로 해소 · 조정해 나갈 수 있는 제도적인 갈등관리 방안과 정책적인 보완이 필요한 실정이다. 공공건설사업은 공공의 이익을 도모하기 위해 공공의 재원을 이용하여 사회간접시설을 건설하고 유지하는 사업으로 공공건설사업을 진행하는 과정에서 정부는 주민의 재산권이나 생존권, 환경권 등과 부딪히기 때문에 보다 근본적으로 예방하기 위해선 관련 부처와 함께 정책수립 및 추진 단계별 이해관계자 간 갈등을 염두에 두고 충분한 사전 협의 과정을 거칠 필요가 있다. 이에 따라, 본 연구는 국가적 차원의 건설사업을 수립함에 있어 건설 관련 이해관계자들 간의 정책적 갈등으로 파급되는 영향요인을 분석하여 다양한 정책 연계 방안을 모색하고 사회적 갈등 해결을 위한 기초 연구자료로서의 활용을 목적으로 하고 있다. In recent years, regional conflicts such as the selection of the location of a new airport in the Southeastern region, the construction of the Milyang power transmission tower have led to regional selfishness such as NIMBY and PIMFY, ignoring the public interest. This causes problems of excessive consumption and financial waste. It is necessary to broaden understanding of public construction projects from the government side. The government needs to prevent regional conflicts and resolve conflicts efficiently and rationally. For this purpose, institutional conflict management and policy supplement are needed. The public construction projects are projects to build and maintain social infrastructure by using public resources to promote the public interest. Accordingly, in the course of public construction projects, the government faces the property rights, the right to survival, and the environmental rights of residents. It is necessary to go through a preliminary consultation process in consideration of policy setting and stakeholder conflicts. Therefore, this study analyzes the factors affecting the policy conflicts among the construction related stakeholder in establishing national - level construction projects. The purpose of this study is to search various policy linkages and to utilize them as basic research data for solving social conflicts.

중학교 영어교사의 교직활동에 대한 인식연구

박은수 ( Eun Soo Park ) 한국현대영어영문학회 2015 현대영어영문학 Vol.59 No.2

The purpose of this study is to investigate middle school English teachers’ perceptions about their teaching job. The study focused on four areas: instruction, relationship with students and parents, working environment, and teaching profession. For this study, 100 English teachers from 15 different middle schools in Kyungnam province participated, and the questionnaire was used for the investigation. The findings revealed that a majority of the teachers perceived positively the effect of English class on students’ English learning, and their dedication and confidence to English teaching was relatively high. However, the teachers viewed the lack of time for preparing their class as the most significant problem. The teacher indicated the heavy administrative workload and various English-related school events as the main reason for the lack of time. Also, the teachers responded that they had hard time in class because of students’ demotivation and students’ different English proficiency level. It should be noted that among 100 English teachers, only 30 English teachers answered that they would be an English teacher if they had to choose a teaching job. In order to adequately support English teachers, the factors influencing teachers’ perceptions should be explored in relation to the teaching career and the size of the school. (Kyungnam University)

A Study of Pre-service English Teachers Practicum Experience

박은수 ( Park Eun-soo ) 한국현대영어영문학회 2016 현대영어영문학 Vol.60 No.3

This study aimed at investigating the student teachers’ perceptions about practicum experiences and challenges. 67 student teachers at the English education department from two different universities participated in the present study. Data were collected during the academic year of 2015. A quantitative questionnaire consisted of 37 items was administered. The findings of the study revealed that the participants have benefited from the practicum practices in the development of teaching skills, the interaction and communication with students. However, the participants highlighted certain challenges they encountered during their practicum experience. In particular, the participants felt less capable in teaching across proficiency levels and classroom management. Also, the participants felt some gap between what they have studied at university and how it can be transformed into effective classroom teaching and learning. Implications and future recommendations were discussed. (Kyungnam University)

소셜 네트워크 분석 방법론을 활용한 1인 주거공간디자인 융합콘텐츠 상관관계 분석

박은수(Park, Eun Soo),김지은(Kim, Ji Eun) 한국전시산업융합연구원 2018 한국과학예술융합학회 Vol.34 No.-

우리나라의 가구구조는 앞으로 1인 가구가 가장 보편적인 가구 유형이 될 것으로 예측되고 있다. 이에 본 연구는 급격히 늘어난 1인 가구 주거자의 삶을 총체적으로 고려한 1인 주거 공간을 디자인하기 위한 콘텐츠를 도출하기 위해, 1인 가구 주거를 형성하는 사회·경제·문화적 영향요인 등을 빅데이터 분석을 통해 객관적으로 도출하고, 콘텐츠 간의 상관관계를 소셜 네트워크 분석 방법론을 활용하여 다각적으로 분석하였다. 빅 데이터 분석 방법론을 적용해 1인 주거공간과 관련된 총 60개의 핵심 콘텐츠를 도출하였으며, 소셜네트워크 분석을 통해 가장 영향력이 큰 콘텐츠는 공간의 편집, 공간 구성 카테고리로 도출되었다. 이는 주거공간은 사용자의 삶의 변화에 따라 탄력적으로 대응할 수 있는 디자인 아이디어가 중요한 부분을 차지한다고 볼 수 있다. 앞으로 더욱 구체화된 1인 주거공간의 컨셉 및 디자인방법론에 대한 연구를 진행하고자 한다. Korea"s housing structure is predicted that one-person housing will be the most common type of housing in Korea. Therefore, this study intends to derive contents for designing a one-person housing space considering the life of a rapidly increasing one-person householder. For this purpose, this study objectively derives the social, economic and cultural influencing factors of one-person households through big data analysis, and analyzed the correlation between contents using social network analysis methodology. In this paper, 60 core contents related to one person housing space were derived by applying big data analysis methodology. And through social network analysis, the most influential contents were derived from the space editing and space composition categories. This means that the residential space is an important part of the design idea that can flexibly respond to changes in the user"s life. Based on this study, future research will focus on the concept and design methodology of one-person housing space.

철도관광산업의 벤치마킹을 통한 서해안의 철도사업 개발에 대한 기초 연구

박은수(Eun Soo Park),탁준우(Jun Woo Tak),장병철(Byung Chul Chang),이태식(Tai Sik Lee) 한국철도학회 2009 한국철도학회 학술발표대회논문집 Vol.2009 No.11월

The Northeast Asia economic bloc by recently Chinese economic growth form. Therefore, speech China and Northeast Asia to economy center which face each other the importance of west-coast area recognize. We need wide area network formation of west-coast ambit, and construction of social overhead capital equipment such as west-coast railroad to achieve these role effectively. We must utilize west-coast area latent tourism resource, and develop goods connected with west-coast railway business. Through this, we must ready draft for activation of west-coast bloc economy and development of railway industry. This research utilizes tourism resource that was latented in existing and enforced inside and outside of the country benchmarking about railway tourism business. And executed basis research for railway tourism business development of west-coast.