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입구와 유연한 구조물로 구성된 경계를 가지는 구조-음향 연성계의 수학적 표현
서희선(Seo, Hee-Seon),김양한(Kim, Yang-Hann) 한국소음진동공학회 2005 한국소음진동공학회 논문집 Vol.15 No.5
This paper explains a general coupling system in terms of the system parameters. impedance of a cavity or mobility of a structure. To easily access the mechanism of the structural-acoustic coupled system, a simple expression is derived. A general coupled equation is also derived of a general coupled problem constituted a flexible structure and an opening boundary in terms of vector and matrix notation, and is analyzed the coupling phenomena using the understanding acquired simple coupled system. The paper shows that the general coupled equation is expanded version of the simple coupled equation by some limiting checks. The paper also shows that the degree of coupling is proportioned to a stiffness of the acoustic system and a modal coupling coefficient, but is in inverse proportion to a mass of the structural system and the difference of the excitation frequency and resonant frequency of the acoustic or structural system.
서희선(Seo, Hee-Seon),조요한(Cho, Yo-Han),조치영(Joh, Chee-Young) 한국소음진동공학회 2007 한국소음진동공학회 논문집 Vol.17 No.9
A study was carried out to investigate the fluid-structure interaction phenomena of buried hydrophone system that exposed complex loads due to handling, transportation and installation. The buried hydrophone system has necessarily neighborhood structures for installation. Because of the neighborhood structure, acoustic field is deformed. We analyze the piezoelectric-structural-acoustic coupled problem and the results to use a finite element analysis software, ANSYS, which has an coupled field analysis capability. The effect of the component of hydrophone system is revealed altogether in pressure distribution. So, we classify and analyze the problem by four different compositions for decomposition.
구조-음향 연성현상을 갖는 방사 방향을 가질 수 있는 방사체 설계방법
서희선(Seo, Hee-Seon),김양한(Kim, Yang-Hann) 한국소음진동공학회 2005 한국소음진동공학회 논문집 Vol.15 No.2
This paper presents a design method for the structural-acoustic coupled radiator that can emit sound in the desired direction. A coupled system that has a finite space and a semi-infinite space separated by two flexible walls and an opening is considered. An objective function is selected to maximize radiation power on a main axis and minimize a side lobe level. To get initial values, prediction of a pressure distribution on field points and radiation pattern of the structural-acoustic coupling system is shown at a coupled-resonant frequency. Three different optimization methods are adapted to design the coupled radiator. Pressure and intensity distribution of the designed radiator is presented.
시각예술가의 성격특성이 창작환경위험요인을 매개로 심리적 웰빙에 미치는 영향
서희선(Hee-Sun Seo) 학습자중심교과교육학회 2023 학습자중심교과교육연구 Vol.23 No.9
목적 본 연구에서는 시각예술가의 성격특성이 창작환경위험요인을 매개로 심리적 웰빙에 미치는 영향을 분석하였다. 방법 이를 위하여 SNS상 ‘서양화가, 미술작가, 개인전, 화가, 한국화가’로 검색된 계정으로, 본 연구의 취지를 안내한 문자를 발송 후 최소 3년 이상 개인전 1회 이상 활동한 시각예술가 75명의 자발적인 참여로 온라인 설문을 실시하였다. 이에 회귀분석 모형에서 독립변수인 성격특성, 매개변수인 창작환경위험요인, 종속변수인 심리적 웰빙을 선정하였다. 결과 시각예술가의 일반적인 특성은 심리적 웰빙에 유의하지 않은 것으로 나타났다. 그러나 성격특성 중 외향성과 성실성이 심리적 웰빙 수준에 영향을 미치는 것으로 나타났다. 또한, 창작환경위험요인의 하위요인인 역할모호성이 낮을수록 심리적 웰빙 수준이 높아지는 것으로 나타났고, 다른 하위요인들은 심리적 웰빙 수준을 설명하기에 영향력이 다소 미미한 것으로 나타났다. 특히 역할모호성은 외향성과 함께 심리적 웰빙에 완전 매개효과를, 성실성과 함께 심리적 웰빙에 부분 매개 역할을 하는 것으로 나타났으며, Sobel 검증 결과 상 그 효과가 유의하였다. 결론 시각예술가들은 높은 외향성과 성실성을 바탕으로, 창작환경위험요인에도 불구하고 자아수용과 자율성, 삶의 목적을 통한 심리적 웰빙을 달성하여 사회구성원으로서 기능하고 있는 것으로 나타났다. 그러나 창작 업무 특성상 역할 지침이 모호하고 책임 범위가 명료하지 않아 심리적 웰빙을 저해할 수 있음이 시사된다. Objectives In this study, the influence of visual artists' personality traits on psychological well-being through creative environment risk factors was analyzed. Methods To this end, 75 visual artists who have been active at least one solo exhibition for at least three years after sending a text message explaining the purpose of this study to an account searched for ‘Western painter, artist, solo exhibition, painter, Korean painter’ on SNS An online survey was conducted with participation. Therefore, in the regression analysis model, personality characteristics as independent variables, creative environment risk factors as parameters, and psychological well-being as dependent variables were selected. Results It was found that the general characteristics of visual artists were not significant in psychological well-being. However, among the personality traits, extroversion and conscientiousness were found to have an effect on the level of psychological well-being. In addition, it was found that the lower the role ambiguity, a sub-factor of creative environment risk factors, the higher the level of psychological well-being, and the other sub-factors were found to have little influence in explaining the level of psychological well-being. In particular, role ambiguity was found to have a complete mediating effect on psychological well-being along with extraversion, and a partial mediating role on psychological well-being along with conscientiousness, and the Sobel test result showed that the effect was significant. Conclusions Based on high extroversion and conscientiousness, it was found that visual artists function as members of society by achieving psychological well-being through self-acceptance, autonomy, and life purpose despite the risk factors in the creative environment. However, due to the nature of creative work, it is suggested that role guidelines are ambiguous and the scope of responsibility is not clear, which can hinder psychological well-being.