• 한국HCI학회:학술대회논문집
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• 한국HCI학회 2008년도 학술대회 1부
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• pp.45-48
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• 2008

박물관이나 전시관에서 많은 관람객들은 전시물에 대한 멀티미디어 정보를 얻기를 원할 뿐만 아니라 특정한 스타일, 작가, 주제별로 관람하고 싶어 한다. 박물관이나 전시관에는 증강 현실을 이용한 선택적 가이드 시스템을 이용하여 글이나 그림, 다국어 음성, 비디오와 같은 전시물에 대한 정보를 관람객에게 제공하며 관람자들의 흥미에 따른 관람 경로를 관람자에게 제공 해준다. 다음 전시물까지 가는 경로의 정보는 증강현실을 이용하거나, 멀티미디어 정보를 이용해서 관람자들에게 제공한다. 이 시스템은 외관적으로는, UMPC(Ultra Mobile PC)와 카메라, 그리고 관성 센서로 구성되어 있다. 처음 이 시스템을 시작하면, 관람자는 자신의 흥미에 맞는 전시물을 메뉴를 선택한다. 그 후, 시스템은 선택된 전시물과 연관된 관람 경로를 설정하고 다음 전시물에 대한 방향과 거리 그리고 어디로 가는지, 어느 방향에 있는지, 얼마나 멀리 있는지 그리고 전시물에 대한 시각적 실마리의 정보가 주어진다. 해당 정보를 이용하여 다음 전시물을 찾고 화면에 표시된 시각적 실마리와 카메라에서 얻어지는 전시물의 영상을 일치시키면 전시물에 대한 정보를 멀티미디어 형태로 보여준다. 사용자들의 간단한 실험을 통해서 이 시스템은 큰 전시실에도 관람자로 하여금 유익하게 관람할 수 있다.

• 한국멀티미디어학회논문지
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• 제17권11호
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• pp.1325-1334
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• 2014

Recently game addiction of young people has become a social issue. Therefore, many studies, mostly surveys, have been conducted to diagnose game addiction. In this paper, we suggest how to distinguish levels of addiction based on EEG. To this end, we first classify four groups by the degrees of addiction to internet games (High-risk group, Vigilance group, Normal group, Good-user group) using CSG (Comprehensive Scale for Assessing Game Behavior) and then measure their Event Related Potential(ERP) in the Go/NoGo Task. Specifically, we measure the signals of P300, N400 and N200 from the channels of the NoGo stimulus and Go stimulus. In addition, we extract distinct features from the discrete wavelet transform of the EEG signal and use these features to distinguish the degrees of addiction to internet games. The experiments in this study show that High-risk and Vigilance group exhibit lower Go-N200 amplitude of Fz channel than Normal and Good-user groups. In Go-P300 and NoGo-P300 of Fz channel, High-risk and Vigilance groups exhibit higher amplitude than Normal and Good-user group. In Go-N400 and NoGo-N400 of Pz channel, High-risk and Vigilance group exhibit lower amplitude than Normal and Good-user group. The test after the learning study of the extracted characteristics of each frequency band from the EEG signal showed 85% classification accuracy.

• 한국실내디자인학회논문집
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• 제22권5호
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• pp.22-32
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• 2013

Today, the museum historical material and mental, physical culture and heritage to preserve the collection and exhibition organization rather than to recognize that culture acts as a community to respond to the subject of the attitude and the ability jeokgeukhwa also due to the trend of the times due to changes in lifestyle education and research, and public participation in culture by expanding the role of dissemination activities are becoming. Museum exhibit these changes as part of a combination of various technologies in the coexistence of digital and analog display direction proactive and aggressive behavior, such as visitors expect to have an evaluation of the public and communicate the expectations of the plan in the exhibition space, the larger the effect can feel. This effective display for visitors to watch the way for a systematic approach to provide direction to the urgent reality. Museum visitors experienced officials to improve the quality of research in a variety of ways spectators began to try and move the action was to put the attention on the characteristics. Visitors to visit the Museum of History and ages, categorized by the type of display any difference in the behavior of the visitor experience and attributes based on what is being investigated for the History Museum's exhibition of any exhibit to visitors that experience and is to an analysis.

• 천문학회지
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• 제48권2호
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• pp.105-112
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• 2015

The symbiotic star V1016 Cygni, a detached binary system consisting of a hot white dwarf and a mass-losing Mira variable, shows very broad emission features at around 6825 Å and 7082 Å, which are Raman scattered O vi λλ 1032, 1038 by atomic hydrogen. In the high resolution spectrum of V1016 Cyg obtained with the Bohyunsan Optical Echelle Spectrograph these broad features exhibit double peak profiles with the red peak stronger than the blue counterpart. However, their profiles differ in such a way that the blue peak of the 7082 feature is relatively weaker than the 6825 counterpart when the two Raman features are normalized to exhibit an equal red peak strength in the Doppler factor space. Assuming that an accretion flow around the white dwarf is responsible for the double peak profiles, we attribute this disparity in the profiles to the local variation of the flux ratio of O vi λλ 1032, 1038 in the accretion flow. A Monte Carlo technique is adopted to provide emissivity maps showing the local emissivity of O vi λ1032 and O vi λ1038 in the vicinity of the white dwarf. We also present a map indicating the differing flux ratios of O vi λλ 1032 and 1038. Our result shows that the flux ratio reaches its maximum of 2 in the emission region responsible for the central trough of the Raman feature and that the flux ratio in the inner red emission region is almost 1. The blue emission region and the outer red emission region exhibit an intermediate ratio around 1.5. We conclude that the disparity in the profiles of the two Raman O vi features strongly implies accretion flow around the white dwarf, which is azimuthally asymmetric.

• 한국콘텐츠학회논문지
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• 제16권12호
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• pp.244-257
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• 2016

본 연구는 소비자의 문화소비성향과 문화서비스속성이 문화서비스만족도에 미치는 영향을 조사하기 위하여 수행되었다. 본 연구의 조사기간은 2015년 1월12일~2015년 2월15일까지였으며, 조사대상자는 20세 이상의 문화서비스를 이용하는 소비자 309명을 대상으로 이루어졌다. 수집된 자료는 SPSS 18.0을 이용하여 요인분석, 군집분석, ANOVA, 교차분석, 다중회귀분석 등으로 통계처리 하였다. 분석결과, 문화소비성향 유형에 따른 공연문화서비스속성의 차이는 고객응대, 고객관리, 서비스이행에서, 전시문화서비스속성에서는 고객응대, 고객관리에서 유의미한 차이가 나타났다. 그리고 문화서비스속성이 만족도에 미치는 영향으로는 공연에서는 '서비스이행', '시설', '고객관리'에서 유의미한 영향을 미치고 있으며, 전시에서는 '서비스이행', '시설', '고객관리, '고객응대'에서 유의미한 영향이 나타났다. 본 연구는 문화서비스를 이용하는 소비자의 만족을 높일 수 있는 기초자료로 활용되기를 기대한다.

• 한국응용과학기술학회지
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• 제18권4호
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• pp.306-315
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• 2001

Our study is aimed at proposal of systematic verification method of molecular structure using measuring method of selective ionic determination and spectrometry on 34 kinds of surfactants such as sodium dodecyl sulfate(SDS) which are most widely used today. In the IR spectrum, unsaturated fatty acids reveal themselves by HC= at $3000{\sim}3020cm^{-1}$, and intensity of $720cm^{-1}$ depends on carbon length of alkyl group. Also ethylene oxide(EO) adducts exhibit weak characteristic bands by $-CH_{2}-CH_{2}-O$ at 1350, 1100 and $950cm^{-1}$. Isethionate can be distinguished from diester succinate by intensity ratio of 1740 and $1200cm^{-1}$ spectrums, the ratio of latter is close to 1 due to 2 carboxylate radical in diester succinate. Quaternary ammonium salts exhibit characteristic band of $C_{4}N^{+}$ at $1000-900㎝^{-1}$. In the case of dialkyl dimethyl ammonium salts in quaternary ammonium surfactants, the spectrum of $3000cm^{-1}$ by $N-CH_{3}$ collapses to a very weak band at $3020cm^{-1}$. In ammonium heterocyclic derivatives, pyridinium salts show characteristic bands at 1640 and $1460cm^{-1}$, while imidazolinium salts exhibit characteristic band at $1620-1610cm^{-1}$. In the characteristic spectrum at $1080-1050cm^{-1}$ on OH radicals of the alkyl esters, primary alcohol appears as weak band and the 2 bands show in almost same intensity when primary and secondary alcohols exist together in one molecule. Also, alkyl ester of polyhydric alcohols appears as various broad band.

• 한국지구과학회지
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• 제24권4호
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• pp.281-289
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• 2003

본 연구의 목적은 세계의 유명한 자연사 박물관을 대상으로 관람객의 흥미도를 높이는 데 효과적인 전시 특성과 교육학적인 전시 특성을 알아보는데 있다. 대상이 되는 전시물은 런던에 있는 영국 자연사박물관, 시드니의 호주 박물관, 뉴욕 미국 자연사 박물관, 와싱턴 디시의 스미소니언 박물관이다. 특히 본연구에서 사용한 107개의 전시 표본들은 주로화석, 지구의 역사 그리고 광물과 같은 고체 지구과학교육 내용의 전시에 초점을 맞추었다. 조사를 위해 본 연구는 7개 항목으로 구성된 체크리스트를 완성했는데 각 항목들은 과학관과 자연사 박물관의 전시특성을 다루었던 기존의 문헌을 바탕으로 한 것이다. 또한 교육적인 측면은 Hein(1995)의 연구를 기초로 하였다. 이 연구에서 사용된 107개의 샘플 전시물은 연구자가 직접 방문하여 촬영하고 슬라이드 필름에 보관한 것을 통해 조사를 진행할 수 있었다. 위 4개의 박물관에 대한 조사 결과는 각기 특성있고 긍정적인 결과를 얻었으나 분석을 통해 각 박물관의 다소의 단점도 드러났다.

• 한국전기전자재료학회:학술대회논문집
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• 한국전기전자재료학회 2008년도 하계학술대회 논문집 Vol.9
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• pp.81-81
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• 2008

Applications of CdS films in this study are to exhibit a high conductivity when they are exposed at light with visible wavelength and sequentially to show a low conductivity in dark state. For this purpose, CdS films should have a high photosensitivity, still maintaining a high conductivity at a visible light. In this study, CdS films were prepared at room temperature on glass substrates by rf magnetron sputtering. In order to increase the photo-conductivity in visible light, various defect levels should be located within the CdS band gap. In order to nucleate the defect sites within the CdS band gap, CdS films were deposited on glass substrates at room temperature using various $H_2$/(Ar+$H_2$) flow ratios by an rf magnetron sputtering. Through the investigation of the structural and photoconductive properties of CdS films by an addition of hydrogen, the relationship between photo- and dark-resistance in CdS films was investigated in detail. 200-nm-thick CdS films for photoconductive sensor applications were prepared at various $H_2$/(Ar+$H_2$) flow ratios on glass substrates at room temperature by rf magnetron sputtering. Sulfur concentration in CdS films crystallized at room temperature with (002) preferred orientation depends directly on the hydrogen atmosphere and the surface roughness of the films gradually increases with increasing hydrogen atmosphere. Films deposited at 8% of $H_2$/(Ar+$H_2$) exhibit an abrupt decrease of dark- and photo-resistance, showing a low photo-sensitivity ($R_{dark}/R_{photo}$). Onthe other hand, films deposited at a hydrogen atmosphere of 42% exhibit a photo-sensitivity of $5\times10^3$, maintaining a photo-resistance of an approximately $2\times10^4\Omega$/square. The dark- and photo-resistance values of CdS films were related with a composition, surface roughness, and defect sites within the band gap.

• Journal of mucopolysaccharidosis and rare diseases
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• 제2권2호
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• pp.43-45
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• 2016

Whole body energy balance is achieved through the coordinated regulation of energy intake and energy expenditure in various tissues including liver, muscle and adipose tissues. A positive energy imbalance by excessive energy intake or insufficient energy expenditure results in obesity and related metabolic diseases. Although there have been many obesity treatment trials aimed at the reduction of energy intake, these strategies have achieved only limited success because of their associated adverse effects. Serotonin is among those traditional pharmacological targets for anti-obesity treatment because central 5-HT functions as an anorexigenic neurotransmitter in the brain. Thus, there have been many trials aimed at increasing the activity of 5-HT in the central nervous system, and some of the developed methods are already used in the clinical setting as anti-obesity drugs. However, recent studies suggest the new functions of peripheral serotonin in energy homeostasis ranging from the endocrine regulation by gut-derived serotonin to the autocrine/paracrine regulation by adipocyte-derived serotonin. Pharmacological inhibition of 5-HT synthesis leads to inhibition of lipogenesis in epididymal white adipose tissue (WAT), induction of browning in inguinal WAT and activation of adaptive thermogenesis in brown adipose tissue (BAT). Fat specific Tph1 knock-out (Tph1 FKO) mice exhibit similar phenotypes as mice with pharmacological inhibition of 5-HT synthesis, suggesting the localized effects of 5-HT in adipose tissues. In addition, Htr3a KO mice exhibit increased energy expenditure in BAT and Htr2a KO mice exhibit the decreased lipid accumulation in WAT. These data suggest the clinical significance of the peripheral serotonergic system as a new therapeutic target for anti-obesity treatment.

• Toxicological Research
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• 제35권1호
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• pp.83-91
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• 2019

Nanoparticles (NPs) have been recognized as both useful tools and potentially toxic materials in various industrial and medicinal fields. Previously, we found that zinc oxide (ZnO) NPs that are neurotoxic to human dopaminergic neuroblastoma SH-SY5Y cells are mediated by lipoxygenase (LOX), not cyclooxygenase-2 (COX-2). Here, we examined whether human bone marrow-derived mesenchymal stem cells (MSCs), which are different from neuroblastoma cells, might exhibit COX-2- and/or LOX-dependent cytotoxicity of ZnO NPs. Additionally, changes in annexin V expression, caspase-3/7 activity, and mitochondrial membrane potential (MMP) induced by ZnO NPs and ZnO were compared at 12 hr and 24 hr after exposure using flow cytometry. Cytotoxicity was measured based on lactate dehydrogenase activity and confirmed by trypan blue staining. Rescue studies were executed using zinc or iron chelators. ZnO NPs and ZnO showed similar dose-dependent and significant cytotoxic effects at concentrations ${\geq}15{\mu}g/mL$, in accordance with annexin V expression, caspase-3/7 activity, and MMP results. Human MSCs exhibited both COX-2 and LOX-mediated cytotoxicity after exposure to ZnO NPs, which was different from human neuroblastoma cells. Zinc and iron chelators significantly attenuated ZnO NPs-induced toxicity. Conclusively, these results suggest that ZnO NPs exhibit both COX-2- and LOX-mediated apoptosis by the participation of mitochondrial dysfunction in human MSC cultures.