• Sleep Medicine and Psychophysiology
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• v.7 no.2
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• pp.96-101
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• 2000

Objectives: Through comparing sleep variables and autonomic activities among three shifts in shift workers, the authors intended to clarify which shift is most tolerable and to identify the characteristics of their psychological and physical problems. This study is also expected to help shift workers to adapt themselves to their work more effectively. Methods: Fifty one shift workers took part in this study. They were working in a rapidly rotating system in which they worked for 3 days in one shift with one day off between each shift. Based on a sleep diary, sleep latency (SL), sleep period time (SPT), and number of wake after sleep onset (NWASO) were estimated and compared among the three shifts. In assessing sleepiness, Epworth sleepiness scale (ESS) and visual analogue scale (VAS) were used. To evaluate mood states among the three shifts, profile of mood states (POMS) was administered. Heart rate variability (HRV), and the level of adrenaline and noradrenaline were measured to assess autonomic activities. HRV included low frequency power (LF), high frequency power (HF), and LF/HF. Results: SPT was significantly lengthened during the evening shift and SL was shortened during the night shift. The workers showed a drop in alertness at wake-up during morning shift and a drop in alertness at work during night shift. During night shift the subjects complained of physical fatigue and cognitive decline. Comparison of HRV showed that parasympathetic activity was most prominent during the evening shift. Secretion of adrenaline and noradrenaline decreased during the evening shift, though statistically not significant. Conclusion: We found that the evening shift was most tolerable among the three shifts. It is recommended that morning light exposure be done during the morning shift and nocturnal light exposure during the night shift.

• Proceedings of the Korean Information Science Society Conference
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• 2010.11a
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• pp.27-31
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• 2010

본 논문에서는 하이퍼그래프의 고유벡터를 척도로 하여 fMRI기반 Brain Network를 분석하여 중요한 허브노드를 찾는 방법론을 제시한다. 이 방법을 비디오게임을 수행하면서 촬영한 기능적 자기뇌영상(fMRI) 데이터인 PBAIC 2007 데이터셋에 대하여 그 유용성을 검증하였다. 이 데이터는 각 20분씩 세 세션을 촬영한 것이며 처음 두 세션에는 13가지의 감정 항목의 평가치가 각 스캔마다 주어진다. 한 피험자의 첫번째 세션 데이터로부터 13가지 감정 항목에 대하여 상관관계가 높은 각각의 복셀(voxel)들을 추출하였다. 이 13가지의 복셀들의 집합들을 각각 하이퍼에지로 보고 하이퍼그래프를 구성하였다. 하이퍼그래프로부 터 인접 행렬(adjacency matrix)를 구성한 후 고유치(eigenvalue)와 고유벡터(eigenvector)를 구하였다. 여기서 고유치가 가장 큰 고유벡터의 원소들은 각 복셀들의 중앙성(centrality), 즉 중요성을 나타내며 이로부터 감정과 관련된 중요한 허브 복셀들과 그들의 국소적 집합인 모듈을 찾았다. 모듈들은 감정 및 작업기억(working memory)과 관련된 뇌 영역들의 클러스터(cluster)로 추정된다.

• The Journal of the Korea Contents Association
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• v.17 no.12
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• pp.257-265
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• 2017

The sand play therapy showed a clinical treatment effect to such children with lots of problem behaviors at the previous studies. This study aimed to evaluate the clinical effect to emotional and behavioral problems with 20 adolescents after 10 weeks group sand play therapy. After sand play therapy, the subjects showed a significant effect such that the MMPI depression scale score, somatic symptoms complaints, social discomfort, psychomotor retardation, somatic dysfunction, affection desire, bizarre sensation experience, shyness/self-consciousness were decreased from baseline to 10 weeks of the study. We suspected that the sand play caused to clinical effect to physical problems as well as emotional problems of the adolescents with school maladaptation.

• Journal of the Korea Society of Computer and Information
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• v.10 no.5 s.37
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• pp.313-322
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• 2005

In this paper, we implement and verify performance monitor for parallel signal processing system, using DSP Starter Kit(DSK) of which the basic Processor is TMS302C6711 chip. The key ideas of this performance monitor is, using Real Time Data Exchange(RTDX) for the Purpose of real-time data transfer and function of DSP/BIOS, the ability to measure the Performance measure like DSP workload, memory usage, and bridge traffic. In the simulation, FFT, 2D FFT, Matrix Multiplication, and Fir Filter, which are widely used DSP algorithms, have been employed. Using performance monitor and Code Composer Studio from Texas Instrument(Tl) , the result has been recorded according to different frequencies, data sizes, and buffer sizes for a single wave file. The accuracy of our performance monitor has been verified by comparing those recorded results.

• Korean Journal of Psychosomatic Medicine
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• v.21 no.2
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• pp.93-98
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• 2013

Pathological laughing and crying(PLC) is a condition that is characterized by episodic, brief, contextually inappropriate, uncontrollable outbursts of laughing and/or crying. It can be observed in patients with various neurological disorders. PLC often causes distress in interpersonal functioning and activities for patients and their families. PLC can be recognized easily with proper understanding of the condition and its nature. Also it generally shows good response to various pharmacological treatments. This review aims to encourage the diagnosis and treatment of PLC by providing definition and clinical presentation of PLC, analysis of its pathophysiology and various current treatment options.

• Transactions of the Korean Society of Mechanical Engineers A
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• v.35 no.11
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• pp.1445-1451
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• 2011

Pneumatic valves are widely used parts that have the ability to control the air supplied to automation systems. However, if failure occurs in a pneumatic valve, it may affect the entire system and could lead to huge losses, depending on the characteristics of the system at the time of failure. Because of this significant risk and the level of consumer demand for reliability, there has been much study on ensuring the reliability of products by predicting valve lifetime distributions and degradation characteristics. In this paper, in order to determine the main factors useful for predicting the lifetime of a pneumatic valve, the scale parameter and $B_{10}$ life time value of the widely used plug-in-type pneumatic manifold valves were measured using complete observational data on the valve lifetimes. And also the property of life distribution has been distribution-suitabilityreviewed by correlation coefficients, the degradation characteristics of valve has been presented by the result of analysis through dynamic response time test and leakage test.

• Proceedings of the Korean Society for Emotion and Sensibility Conference
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• 2009.05a
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• pp.235-238
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• 2009

최근 생활수준의 향상으로 의복의 기능성이 중시되면서, 건강, 감성, 쾌적 등에 대한 욕구를 충족시킬 수 있는 건강 소재 개발에 대한 연구와 니트에 관한 선호도 및 감성연구는 활발히 진행되고 있다. 그러나 현재까지 건강 니트 소재의 감각 및 감성이미지에 관한 연구는 부족한 실정이다. 본 연구는 키토산 섬유와 서스 섬유의 니트 소재를 편성한 다음 최종 소비자의 감각과 감성이미지에 미치는 영향을 연구하여 실제 건강 니트 소재를 기획하는데 필요한 정보를 제시하고자 한다. 본 연구에서 키토산 섬유와 서스 섬유를 회색계열로 변화를 주어 10 게이지의 컴퓨터 자동 횡편기로 5 종의 평편 시료를 편성하였고 20 대 남녀 대학생 69 명을 대상으로 5 종의 시료($20\;cm{\times}15\;cm$)를 랜덤한 순서로 제시하여 눈으로 시료를 보고 직접 만지면서 평가하도록 하였으며, 감각 18 개와 감성 22 개, 선호도 3 개의 총 43 개 형용사로 이루어진 7 점 척도를 사용하였다. 건강 니트 소재의 감각 및 감성 이미지를 요인 분석한 결과, 감각요인은 '부피감', '요철감', '신축감', '현시감', 변형감'의 5 가지 요인, 감성요인은 '온유감', '안정감', '고급감', '활동감'의 4 가지 요인으로 분류되었다. 색 속성 중 명도 수준별 감각요인 및 감성요인 중 '요철감'과 '안정감'의 매우 유의한 차이가 나타났다. 고명도, 저명도 수준은 울퉁불퉁하고 오톨도톨하지만 안정적이고 깨끗한 이미지로 느끼는 것으로 나타났고 중간 명도수준은 '요철감'과 '안정감'이 감소되었다. 차콜색의 키토산 100%와 연회씩의 서스 100%의 경우 울퉁불퉁하고 오톨도톨하지만 안정적이고 깨끗한 이미지로 느끼는 것으로 나타났고, 차콜색 키토산섬유와 연회색 서스섬유를 혼방하여 편성한 경우 '요철감'과 '안정감'이 감소되었다.

• Journal of Digital Convergence
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• v.11 no.7
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• pp.165-171
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• 2013

Coding patterns that appeared frequently in the source code is a typical piece of code. The functionality that difficult to modularize, such as logging or synchronization processing, and the useful sentences in programming is extracted in software as codding pattern. Large-scale software could not be analyzed fully because the number of coding pattern that can be manually investigated is limited. In this paper, the characteristics of coding patterns perform the evaluation. The goal is to extract for codding-pattern to analyzed by developer. We was selected 6 indicators and performed analysis of 4 open-source. Matrix relations between the values and characteristics of the actual pattern analysis, pattern instances, the width of the distribution of instances, the pattern repeating structure of the elements included in the rates should be analyzed for patterns and indicators that help in choosing was confirmed.

• Proceedings of the Korean Institute Of Construction Engineering and Management
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• 2007.11a
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• pp.1015-1018
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• 2007

VE is one of the most effective and systematic tool available to achieve the required function at minimum cost and manage in many industrial fields. The purpose of the preparation phase VE job plan is to establish a cooperation system referring to groups for the successful implementation of VE, and to achieve a common objective to collect sufficient materials required in the analysis phase. The Quality Model is used to measure the requirement of shareholders(users and owners)in the project. It also offers a guideline on decision making when executing the function definition, function arrangement, function evaluation, and the idea evaluation of VE. However, the current the preparation phase business confirms that the required items of owners and users has not suggested definite goals and directions. This study analyzes the problems of current work in the preparation phase from case study, survey and interviews of experts. It then proposes a new process after understanding the required items of owners, users and experts.

• Proceedings of the Korean Institute Of Construction Engineering and Management
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• 2007.11a
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• pp.1035-1038
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• 2007

Just as social welfare facilities and system are the barometers of a nation's quality & standard of living, the facilities of student's union building symbolizes level of welfare facilities and systems of a university. A university is a group of individuals searching for and studying the truth, so it is the highest of all education centers. At the same time, a university builds one's character. this infers that leisure activity in a university is a condition that facilitates the ability to create a healthy body and healthy soul. Additionally, active experiences for a human social life take people away from daily stresses and release the tensions of university studies. Therefore, a university campus should be built not only for students researching and studying, but also to aid in the growth of a students body, soul and mind. When creating a university master plan, increasing the number of students, promotion of a good educational environment and preparation of students for future development should be of primary consideration. There are several factors to aid this. The factors are; the academic plan, leisure activity, the belief system of university student and physical and environmental factors. The research presented here tells us the most important factor for developing the master plan of a student's union building