• Proceedings of the Acoustical Society of Korea Conference
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• spring
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• pp.407-410
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• 2002

본 논문은 스피커의 후면 방사음을 이용하여 저주파수의 음을 재생하기 위한 인클로져(enclosure) 방식 중 통기구(Vent)를 이용한 위상반전(Bass Reflex) 방식의 스피커 시스템에 관한 것이다. 일반적으로 위상반전형 스피커 시스템의 임피던스 곡선의 특성은 저주파수 대역에서 통기구의 공명에 대한 것과 구동스피커의 공명에 대한 임피던스 봉(mound)이 나타난다. 기존의 연구 결과들은 통기구와 인플로져의 용적에 관련된 최저 주파수에서의 공명에 대한 것만을 대상으로 하였다. 즉, 최저 주파수에서의 공명특성이 상대적으로 높은 주파수에서 나타나는 스피커의 공명특성에 미치는 영향과 이로 인한 스피커의 음파발생 특성에 관하여 구체적인 논의가 되지 않았다. 본 논문에서는 위상반전형 스피커 시스템에서의 두 임피던스 봉오리 사이의 관계를 정리하고, 상대적으로 높은 주파수에서 발생되는 임피던스의 공명 특성에 따른 스피커의 음파발생 특성에 관해 연구하였다.

• 한국IT서비스학회:학술대회논문집
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• 2008.05a
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• pp.377-382
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• 2008

본 연구 에서는 웹 기반 협동학습 시스템을 활용 할 경우 주관적 규범과 상호작용이 적용된 TAM모형이 필요함을 제시하고 이를 실증 분석하였다. 주관적 규범은 기술수용을 결정짓는 개인의 신념 요소인 유용성과 사용의도에 강한 긍정적 의향을 갖게 하는 변수이고, 준거집단을 통해서 행동이나 인지에 영향을 줄 수 있는 변수이다. 팀장은 팀원 및 학습자들과 의 상호작용( 협동학습을 통한 화상토론, 게시판정활동, 오프라인 정기 모임, 동영상 동시 시청)과 팀원 관리 및 운영하는 역할이기 때문에 준거집단의 준 거인이 될 수 있다. 따라서, 새로운 정보 기술 및 시스템 수용에 관한 시스템 사용 권유를 하거나, 직접 기술사용을 하는 행동은 협동합습에 참여한 학습자들에게 조금이나마 영향을 줄 수 있음을 추측 해 볼 수 있고 영향력 있는 외부변수로 가설 검증해보았다. 외부변수로서의 주관적 규범과 상호작용은 지각된 사용용이성을 제외하고 TAM의 신념 요소인 유용성, 흥미성과 사용의도에 강한 영향력을 보였다. 또한 사용의도와 유의한 관계가 있는 사용도 측정을 2가지 방법(인지적과 객관적 측도)으로 측정하였으며, 상관관계가 유의함을 함께 제시 했다.

• 한국IT서비스학회:학술대회논문집
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• 2008.05a
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• pp.199-205
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• 2008

유비쿼터스 환경의 필수 부분인 홈 네트워크는 많은 서비스들을 가지고 생활 곳곳에 파고들고 있다. 정부의 IT839정책을 기반으로 홈 네트워크의 실용화와 구체적인 정책을 형성하기 위해 활발한 연구가 진행되고 있다. 국내와 해외의 홈 네트워크 융성 정책 비교, 고객의 홈 네트워크 서비스 별 선호도를 비롯하여 최근에는 홈 네트워크 서비스의 사용의도와 관련한 연구들까지 있었다. 본 연구는 이러한 연구들을 바탕으로 홈 네트워크 사용의도에 영향을 주는 요인들을 조사하고 이 관계에 있어서 인구통계 변수인 연령과 인터넷 사용량의 조절효과를 측정해보았다. 그리고 홈 네트워크를 자동화 서비스, 안전 서비스, 엔터테인먼트 서비스 세 집단으로 나누고 각각을 따로 분석하였다. 분석 집단은 현재 운영되고 있는 홈 네트워크 서비스를 직접 사용해 본 경험이 있는 아파트 거주자이다. 분석 결과 연령이 높을수록 홈 엔터테인먼트 서비스 사용 시 서비스의 사용용 이성과 보안성이 중요하게 작용하였다. 또한 인터넷 사용량이 많은 집단은 홈 자동화 서비스의 사용 시 해당 서비스로부터 얻을 수 있는 효용, 편익을 중요시 여겼다.

• Proceedings of the Korea Information Processing Society Conference
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• 2023.05a
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• pp.394-395
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• 2023

"이성적이며 이상적인 합리적 인간"을 가정하는 기존 경제학의 이론이 항상 실제 상황과 일치하지는 않는 것으로 알려져 있다. 이의 대안으로 나온 행동경제학은, 인간의 경제적 의사결정에 심리, 인지, 감정, 사회문화적 배경 등이 영향을 미친다고 본다. 본 연구에서는 행동경제학에 의거하여, 개인의 감정과 경험이 경제적 의사결정에 영향을 미치는지 여부를 빅데이터 모델을 활용하여 분석하였다. SNS 여론으로는 Reddit, 주가지수로는 S&P 500 을 선정하였다. 수집한 텍스트 데이터를 전처리와 감정분석을 통해 독립변수 값으로 사용했고, 주가지수 등락의 방향성을 종속변수로 사용하여 로지스틱 모형을 구성했다. 모델을 활용하여 분석한 결과 Public sentiment 와 Market sentiment 간 양의 상관관계를 확인할 수 있었다. 또한, lag 를 설정하는 모델이 정확도가 더욱 높음을 확인해, 기존 경제학의 EMH 와 대립되는 바를 확인할 수 있었다. 하지만 최적의 lag 산정을 위해, 더 광범위한 데이터를 바탕으로 한 후속연구가 필요하다.

• Journal of the Korea Concrete Institute
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• v.13 no.5
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• pp.447-456
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• 2001

Many investigators have tried to represent the nonlinear behavior of stress-strain relationship of concrete using mathematical curves. Most of empirical expressions for stress-strain relationship, however, have focused on old age concrete, and were not able to represent well the behavior of concrete at an early age. Where wide understanding on the behavior of concrete from early age to old age is very important in evaluating the durability and service life of concrete structures. In this paper, effect of 5 different strength levels and ages of from 12 hours to 28 days on compressive stress-strain relationship was observed experimentally and analytically. Tests were carried out on $\phi$100${\times}$200mm cylindrical specimens water-cured at 20${\pm}$3$^{\circ}C$. An analytical expression of stress-stain relationship with strength and age was developed using regression analyses on experimental results. For the verification of the proposed model, the model was compared with present and existing experimental data and some existing models. The analysis shows that the proposed model predicts well experimental data and describes well effect of strength and age on stress-strain relationship.

• Sleep Medicine and Psychophysiology
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• v.1 no.2
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• pp.156-162
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• 1994

Objectives: Eyeblinking varied depending on individual cognitive abilities or personality traits thought to related to brain mechanisms of sensory modulation. This study explored whether personality traits are related to the rate of eye blinks and how eyeblink and evoked potential augumenting-reducing(EPAR) interact Methods: Forty four students were studied with EPAR topography to explore how eyeblinks, personality and EPAR interact The Zuckerman Sensation Seeking Scale(SSS) and Eysenck Personality Questionnaire(EPQ) were used as personality measured by a stimulus response program during EP study. Results: Rate of blink increased as intensity of light increased. The General(GEN), Thrill and Adventure Seeking(TAS), Experience Seeking(ES) and Disinhibition(DS) subscales in SSS and Extraversion-Introversion(E) subscale in EPQ showed significant negative correlations with number of eyeblinks in the hightest intensity of light, whereas Neuroticism(N) subscales in EPQ showed a positive correlation. Correlation between number of eyeblinks with the brightest light and EPAR slope varied topographically. The strongest positive correlation was noted in right posterior temporal area. Conclusion: High sensation seekers blinked significantly fewer times than lower sensation seeker did. Higher personality correlations with eyeblink than with EP may imply that the eyeblink works as a primary filter since it is more directly related to central mechanisms of sensory modulation than EP. The right posterior temporal area may play an important role in modulation of visual stimuli.

• Journal of Korean Home Economics Education Association
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• v.19 no.3
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• pp.107-118
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• 2007

The purpose of this study was to investigate the effects of relationships with parents and self-esteem on application of family life part in Home Economics curriculum of the middle-school student. The subjects of this study were 900 students of first grade of middle school who reside in Seoul and 878 self reported questionnaires were used for final analysis. The major results of this study were as follows: First, male students showed more applications of a characteristic of adolescent in family life part in Home Economics curriculum than female students. Second, the most effective variables on middle-school students' application the family life part in Home Economics curriculum were relationships between parent and adolescent, self-esteem. Middle-school students' application of family life part in Home Economics curriculum were positively influenced by relationships between parent and adolescent and self-esteem.

• Journal of Korea Entertainment Industry Association
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• v.13 no.6
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• pp.211-220
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• 2019

It helps to wisely abstain from errors of the a priori subjective emotions related to human emotions, and orders emotions to make rational choices. These emotional happiness of human and moral sensitivities work directly or indirectly in rational choice of rational thought and reason. Abraham would have been troubled by the divine mandate to sacrifice a son who was only one, and a son who had been healed. Was his reason reasonable at this time? In rational reason, it can be said that the act of dedicating his son is an appropriate act, but is it possible in the human mind? Aristoteles also called human virtue virtue in good for human beings. Because happiness is also a mental activity, we have to know a certain degree about the mind. This ψυχή(psyche, spirit) spirit is an irrational element that is invisible but an intervention in rational principles. Also C. G. Jung states that all human beings have four dynamic psychological functions that are not visible, and that the mind is driven by these four functional dimensions. This means that the elements of S, Sensing, N, Intuition, T, Thinking, and Feeling are combined. David Hume also emphasized the principle of empathy, asserting that morality can not be derived from reason, and Max Ferdinand Scheler, before grasping the visual characteristics of a person, has already captured the whole feeling of the person, And that the value given to this feeling is the value, and that the function of emotion that is elevated to the perceived object by grasping the value through this process and the value is always preceded by the reason. Emmanuel Levinas states that emotional emotions of love are ahead of reason and that emotions precede human reasoning and rationality is the inability of emotional control that we need rational thought and rational and wise action as reason of control and temperance. As part of human emotional education, in the 7th curriculum, Bloom's cognitive, perceptive, and behavioral domain, which is a person with integrated thinking, is trying to be a moral practitioner. It focuses on how to act according to the direction of emotions for virtuous acts and how to develop emotions for emotions on behalf of vicious acts. We can design the possibility and direction of cultivating human emotions and emotional happiness and happy sensitivities by the principle of strengthening virtue and the principle of elimination of ill feeling.

• Culinary science and hospitality research
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• v.18 no.1
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• pp.77-90
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• 2012

This study investigates the causal relationships among the factors influencing behavioral intention related to beef traceability and TAM to make diet safer. To do this, this study conducted a survey targeting the customers who use the department stores, specialty shops and large supermarkets in Seoul. The result is as follows. First, the higher the information quality in beef traceability(t=3.872) and social impact (t=1.938) were, the higher the usability became significantly. Second, as the social impact of food traceability(t=2.014), information accessibility(t=2.016), perceived risk(t=1.910) became higher, the perceived usefulness was shown significantly higher. Third, as the usability(t=5.826) was perceived higher, the perceived usefulness became higher. Fourth, the higher the perceived usefulness(t=4.264), the higher the behavioral intention among the customers. Also, the lower the usability(t=-0.682), the lower the behavioral intention.

• Korean Journal of Human Ecology
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• v.21 no.4
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• pp.695-704
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• 2012

The purpose of this study is to understand the elderly's attitudes toward dating and remarriage, as well as how they are influenced by their relationships with their children, and to categorize the attitudes toward dating and remarriage, and examine each type's characteristics. The results are as follows: 1. Widowed elderly were positive towards dating and remarriage, and were more positive towards dating than towards remarriage. 2. The influence of the relationships with the elderly's children was bigger on remarriage than on dating. 3. Among the typology of attitudes, 'pro-dating/anti-remarriage' group had the most participants, and 'anti-dating/anti-remarriage' group had the least participants. 4. It is worth noting that 'anti-dating/pro-remarriage' group had distinctly different characteristics compared to 'pro-dating/anti-remarriage' group, as was with "pro-dating/pro-remarriage" group and 'anti-dating/anti-remarriage' group. To elaborate, those who belonged to 'anti-dating/pro-remarriage' group were younger, mostly male, relatively highly educated, had weaker emotional ties with children, and got the least help. In contrast, the members of 'pro-dating/anti-remarriage' group were older, overwhelmingly female, and vast majority of them were lowly educated. Also, they had stronger emotional ties with the children, and got the most help. 'Anti-dating/anti-remarriage' group and 'pro-dating/pro-remarriage' group showed a contrast in the intensity of emotional ties with their children. The former was the strongest in emotional ties, and got a considerable amount of help, while the latter was weaker in emotional ties and got less help.