• 대한수학교육학회지:학교수학
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• 제18권3호
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• pp.457-478
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• 2016

본 연구의 목적은 중학생들의 함수의 그래프 개념에 대한 이해와 발달을 탐색하는 것이다. 본 연구를 위해 일차함수를 학습한 경험이 없는 중학생 2명을 대상으로 약 7개월에 걸쳐 교수실험을 진행하였고, 수업을 진행하고 분석하는 과정에서 두 학생 모두 상황을 그래프로 표현하고 그래프를 상황에 적절하게 해석하는 초기 과제에서 두 변량 사이의 함수 관계보다 산술적인 값들에 주안점을 둔다는 것이 드러났다. 이에 본 연구에서는 함수의 그래프에 대한 이해와 발달, 학생간의 차이점이 드러나는 과제에 주목하여 교사가 학생들에게 제시한 과제의 의도 및 역할, 과제에 대한 학생의 반응을 기술하였다. 특히 학생의 반응은 Castillow-Garsow(2012)가 제안한 과제를 해결하는 방식, 그 방식을 이끌어내는 추론, 과제의 해결로 나누어 분석하였다. 그 결과, 함수의 그래프 표현 및 해석에서 양들의 변화와 연속성에 대한 인식의 중요성을 확인하였다.

• 한국실내디자인학회논문집
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• 제19권5호
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• pp.83-94
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• 2010

Conventionally, ornament has developed around linear thinking based on Euclidean geometry, and been explained as simple and lucid natural Euclidean geometrical phenomena. The modular arrangement with vertical, horizontal and diagonal grids has been an organizing principle of classical ornament, but in digital era ornament is found not to be explained only with the principle of traditional arrangement due to the seemingly irregular complex forms. In that sense, this study presents the concept of digital ornament and examined the backgrounds of ornament in digital age, that are complex system and non-Euclidean geometry. Accordingly, the present study takes an approach by dividing new formal types of ornament into algorithmic form, hybrid form and dynamic form to find out a principle of pattern organization. Lately, architects who actively use computer for their architectural designs take the algorithmic strategies in nature and create various and complex patterns by simple rules. The patterns are not the repetition of the same, but the production of singularities. In addition, hybrid form by morphing shows a topologically flexible evolutionary transformation, and is used to create in-between transitional shapes from the source to target. Finally, the patterns by the interaction between the system components which are corresponded to the embedded forces emerge from dynamic simulation of the natural environment. Rather than objects itself, focus is given to the process of generating forms, and the ornamental patterns as the revelation of such implicit order provide not just the formal beauty but also spatial pathways for lights and air, maximizing the effects of lights.

• 간호행정학회지
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• 제21권1호
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• pp.43-52
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• 2015

Purpose: In this study, behavioral styles of Dominance, Influence, Steadiness, and Conscientiousness (DISC) were examined and differences in job satisfaction and clinical competence among newly hired nurses were explored. Methods: For this explanatory correlational research, 176 newly hired clinical nurses were recruited from three university hospitals and one general hospital located in Seoul and Gyeonggi province. Data were collected in August, 2013 though self-report questionnaires. Results: The distribution of behavioral styles was 11.4%, 42%, 29% and 17.6% for Dominance, Influence, Steadiness, and Conscientiousness respectively. DISC behavioral styles were associated with sub-areas of job satisfaction such as professional position and doctor-nurse relationship. DISC behavioral styles were significantly associated with the total score for clinical competence and sub-areas of data collection, basic nursing skills, critical thinking, education and leadership, and attitudes toward professional development and practical skills. Multiple linear regression analysis showed that DISC behavioral styles predicted clinical competence (Adj. $R^2$=.14, F=9.42, p<.001). Conclusion: A focus on cultivating influential and steady behavioral styles among newly hired nurses can be helpful in improving job satisfaction and clinical competence. There is a need to improve interpersonal relationships through a deeper understanding of each person's behavioral style based on the analysis of DISC behavioral styles.

• Journal of Construction Engineering and Project Management
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• 제5권4호
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• pp.1-6
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• 2015

Due to unique characteristics of small construction companies, safety management is comprised of complex problems. This paper aims to better understand the complexity and dynamics of safety management in small construction companies. A system dynamics (SD) model was built in order to capture the causal interdependencies between factors at different system levels (regulation, organization, technical and individual) and their effects on safety outcomes. Various tests were conducted to build confidence in the model's usefulness to understand safety problems facing small companies from a system dynamics view. A number of policies were analyzed by changing the value of parameters. The value of a system dynamics approach to safety management in small construction companies is its ability to address joint effects of multiple safety risk factors on safety performance with a systems thinking perspective. By taking into account feedback loops and non-linear relationships, such a system dynamics model provides insights into the complex causes of relatively poor safety performance of small construction companies and improvement strategies.

• 한국실내디자인학회논문집
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• 제17권4호
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• pp.3-10
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• 2008

In the Western and Oriental architecture, corridor and stairs have not been important from the whole architectural composition. The purpose of this study is to analyze their elements from theoretical viewpoint of modern architecture. The subject of analysis are Yangjindang and Daesanru of the Mid-Chosun Dynasty in Sangju. The conclusions are the followings : First, the moving line in the Western and Oriental architecture has the linear axis, and in general moving axis is straighten in Hanok architecture. But unlike common traditional architecture, the two buildings are right-angled in the moving axies. Second, Toenmaru in Yangjindang is the element of visual experience in the whole architectural space as promenade architecture called by Le Corbusier. On the other hand, Toenmaru in Daesanru plays a role the space of thinking in extending a visual field to the nature than its pure function. Third, the stairs of Yangjindang is diagonal shape with a role of entrance, but that of Daesanru was concealed in the wall as interior step. Yangjindang has two different stairs. One is broad and shallow stairs with ceremonial or public expression, and the other is narrow and steep stairs with unstable or private expression. This paper intends to show the latent architectural possibility of our traditional architecture.

• 영재교육연구
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• 제13권4호
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• pp.119-140
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• 2003

이 연구의 목적은 초·중·고등학교의 교육현장에서 창의성의 영역성이 어떻게 나타나는가를 실증적으로 검증하는 것이다. 연구대상을 전체학생 집단, 고창의성 집단, 저창의성 집단의 3개 집단으로 구분하여 각 집단에서의 영역성을 비교 규명하는 것이다. ‘능력-분화가설’에 기초하여, 4개 영역간의 상관관계, 영역-일반성의 변인과 영역-특수성의 영역간의 상관관계, 그리고 영역-특수성에 대한 영역-일반성의 상대적 예측력을 분석하였다. 연구결과, 연구가설과는 오히려 반대의 결과가 나타났다. 즉, 저창의성 집단에서는 영역-특수성을 지지하였으나, 전체학생과 고창의성 집단에서 영역-일반성과 영역-특수성의 어느 한쪽을 일방적으로 지지하기 어려운 결과가 나타났다. 오히려 영역-일방성과 영역-특수성이 상호 보완 또는 통합되는 영역-상보설이 지지되었다.

• 생물정신의학
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• 제30권1호
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• pp.24-30
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• 2023

Objectives Alzheimer's disease (AD) is the most common form of dementia in older adults, damaging the brain and resulting in impaired memory, thinking, and behavior. The identification of differentially expressed genes and related pathways among affected brain regions can provide more information on the mechanisms of AD. The aim of our study was to identify differentially expressed genes associated with AD and combined biomarkers among them to improve AD risk prediction accuracy. Methods Machine learning methods were used to compare the performance of the identified combined biomarkers. In this study, three publicly available gene expression datasets from the hippocampal brain region were used. Results We detected 31 significant common genes from two different microarray datasets using the limma package. Some of them belonged to 11 biological pathways. Combined biomarkers were identified in two microarray datasets and were evaluated in a different dataset. The performance of the predictive models using the combined biomarkers was superior to those of models using a single gene. When two genes were combined, the most predictive gene set in the evaluation dataset was ATR and PRKCB when linear discriminant analysis was applied. Conclusions Combined biomarkers showed good performance in predicting the risk of AD. The constructed predictive nomogram using combined biomarkers could easily be used by clinicians to identify high-risk individuals so that more efficient trials could be designed to reduce the incidence of AD.

• 국제학술발표논문집
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• The 6th International Conference on Construction Engineering and Project Management
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• pp.92-96
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• 2015

Due to unique characteristics of small construction companies, safety management is comprised of complex problems (e.g., resources constraints, a lack of formalized management structures, low level of management safety commitment etc.). In order to understand causal interdependencies between safety factors at different system levels (regulation, organization, technical and individual), this paper aims to develop a system dynamics (SD) model of safety management in small construction companies. The purpose of the SD model is to better understand why small construction companies have low level of safety performance. A causal loop diagram (CLD) was developed based on literature, with an attempt to map causal relationships between variables. The CLD was then converted into stock and flow diagram for simulation. Various tests were conducted to build confidence in the model's ability to represent the reality. A number of policies were analyzed by changing the value of parameters. The value of a system dynamics approach to safety management in small construction companies is its ability to address joint effects of multiple safety risk factors on safety performance with a systems thinking perspective. By taking into account feedback loops and non-linear relationships, such a system dynamics model provides insights into the complex causes of relatively poor safety performance of small construction companies and improvement strategies.

• 치위생과학회지
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• 제16권5호
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• pp.331-338
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• 2016

본 연구는 치과위생사들을 대상으로 임상수행능력에 영향을 미치는 요인 간의 인과관계를 파악하고자 2015년 2월 28일부터 2015년 4월 28일까지 부산 경남 일부지역 치과 병 의원에 근무하는 치과위생사를 대상으로 254명을 최종분석한 결과는 다음과 같다. 연구변수들 간의 상관분석 결과 모든 변수에 대해 통계적으로 유의한 상관관계를 보였다(p<0.01). 임상수행능력에 영향을 미치는 요인을 알아보기 위해 선형 회귀분석 결과 자아존중감, 셀프리더십과 전문직 자아개념에서 유의한 차이를 보였다(p<0.01). 치과위생사의 임상수행능력에 영향을 미치는 연구변수들 간의 인과관계를 알아보고자 경로모형을 분석한 결과 소진과 비판적 사고는 간접영향, 자아존중감과 셀프리더십, 전문직 자아개념은 직 간접적으로 영향을 끼치는 것으로 나타났다. 이상의 결과 치과위생사의 자아존중감, 셀프리더십과 전문직 자아개념을 높일 수 있도록 치위생 교과목에서의 교육기회가 이루어지도록 마련되어야 하며, 치과 병 의원에서도 실무적인 세미나와 치과위생사의 개인적인 내적 성향을 발휘 할 수 있도록 치과위생사의 임상수행능력 향상에 도움이 될 수 있는 프로그램들이 구체적으로 마련되어 환자들의 양질의 진료와 서비스를 제공할 수 있도록 하여야 한다.

• 디자인학연구
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• 제15권4호
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• pp.379-390
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• 2002

새로운 패러다임으로의 전이를 의미하는 과학혁명은 필연적으로 지적 영역의 변화를 동반한다. 더욱이 과학과 예술의 관계는 서로를 가능케 하는 상생의 관계라 할 수 있다. 최근 비선형 과학에 대한 놀라운 관심과 함께 예술에의 신속한 적용은 양자의 긴밀한 상호작용을 다시 한 번 가늠케 한다. 과학과 예술에 있어서 중요한 것은 새로운 창조의 과정과 방법을 제시하는 일일 것이다. 이를 위하여 때로는 역발상을 시도하고, 또한 일상을 탈피하여 예측할 수 없었던 것들을 추적하는 모험과 탐구정신이 절실하다. 이와 같은 관점에서 본 연구는 비선형 패러다임의 기저가 되는 카오스 이론과 함께, 물리학과 수학에서 다루어지는 관련 이론들을 준거로 하여 비선형적 공간조형을 재검토하였다. 연구 과정에서 비선형은 일련의 계(a system)에 대하여 부분이 아닌 전체로 보아야 할 것에 대한 강력한 제안이며, 또한 새로운 질서요 창조의 원리임을 확인할 수 있었다. 이울러 본 연구는 비선형적 공간 조형에 있어서 형태적 차용에 급급한 디자인 행위를 지양하도록 하는데에 암묵적 의도가 있었다. 따라서 비선형 동력학 현상의 원리와 프로세스를 이해, 적용함으로써 비선형이 지닌 창조적 속성이 공간에 총체적으로 발휘되기를 기대해 본다.