• Journal of Broadcast Engineering
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• v.21 no.2
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• pp.210-218
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• 2016

In this study VOD usage patterns(VOD use and paid amount) of IPTV users were investigated reflecting the level of media use characteristics such as TV viewing time, star preference, and genre preference. Also the impact of media using characteristics and the evaluation of guide channel on the intention to use VOD was analyzed. The web survey was conducted against the respondents who have used VOD and guide channel. The results are as follows. Among the media usage characteristics, star preference has the impact on the VOD use, while genre preference has relation to the willingness to pay for VOD. Secondly, the intention to view the guide channel, entertainment of the channel, and the users' genre preference have significant impacts on the intention to use VOD. Therefore, it is necessary to raise the viewing rate of guide channel by providing the customized promotion strategy and diverse events based on the analysis of VOD usage.

• Polymer(Korea)
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• v.24 no.5
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• pp.638-645
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• 2000

Linear and star-shaped, poly(lactic acid) (PLA) stereo-block copolymers were synthesized by sequential polymerization of DL-lactic acid and L-lactide in the presence of diol or polyol compounds. The molecular weight of block copolymers could be controlled to some extent by the variation of alcohol content. These block copolymers had relatively narrow molecular weight distributions. The glass transition temperature and melting temperature of block copolymers appeared at around 5$0^{\circ}C$ and 100~14$0^{\circ}C$, respectively. The block copolymers were found to crystallize even at the high D-stereoisomer concentration of 35 mol%, in contrast to the amorphous nature of the random copolymer with similar composition. Also we could observe the crystallinity of PLA stereo-block copolymers varying with annealing temperature and time.

• Resources Recycling
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• v.12 no.3
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• pp.46-53
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• 2003

Recycling of aluminum dross is an important issue in the secondary aluminum industries. In this study, aluminum dross generated in the domestic secondary aluminum industry was processed to use it as raw material for producing alumina refractories. Sample dross was classified according to its size. The dross smaller than 1 mm was leached with sodium hydroxide solution to extract the remained aluminum from the dross into the solution. and then aluminum hydroxide precipitate was recovered from the leach liquor. The waste residue in the leaching was washed, dried and roasted. Most remained metallic components in the residue was changed into oxide through the processes. The roasted dross was made into alumina castable refractories by mixing with aggregates and a binder. Bending strength of the tested castable specimen was over $25\;kg/\textrm{m}^2$ and compressive strength over $80\;kg/\textrm{cm}^2$, which satisfied the Korean Standard value respectively. From the results, it was suggested that this process could be applicable to recycling of aluminum dross.

• Review of Culture and Economy
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• v.19 no.2
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• pp.3-28
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• 2016

The present study attempted the segmentation of the art gallery visitors on the basis of leisure lifestyles. For this purpose, leisure lifestyle surveys were administered at Korea's three representative art galleries, the National Museum of Modern and Contemporary Art, Seoul Museum of Art, and Seoul Art Center's Hangaram Art Museum. A total of 314 questionnaires were analyzed to identify leisure lifestyle factors. On the basis of the lifestyle factors, a cluster analysis was performed, and then the differences of demographics, museum visiting behaviors, and general cultural consumption among the clusters were examined. The cluster analysis revealed four groups of lifestyles, 'culture and art lovers', 'active homebodies', 'low leisure spenders', and 'omnivorous culture and sports participants'. The four groups revealed the differences in terms of demographics, museum visiting behaviors, and general cultural consumption. On the basis of the findings, the marketing strategies targeting the segmented art gallery markets were discussed.

• KIISE Transactions on Computing Practices
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• v.20 no.12
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• pp.670-675
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• 2014

Graphical user interfaces (GUI) in modern software deliver information visually, and a well-designed interface can provide information to the use in an organized and intuitive manner while poorly-designed interfaces can cause visual inconvenience and confusion. In order to effectively deliver information to the user, visual attention should be placed on a prominent location in the image. This paper introduces a method based on a human visual system (HVS) that can improve Metro-style GUIs by reducing a user's workload to visually find information. Our method is designed with spatial mapping and color mapping for buttons in the Metro-style GUI. Also we define a metric for Metro-style GUI effectiveness, including an optimization algorithm. The results show that our method improves the performance of visual search tasks in a Metro-style GUI.

• The Journal of the Korea Contents Association
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• v.17 no.1
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• pp.585-593
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• 2017

This study is about an observation, namely, the starting point of a role creation with playing a bridge role regarding the work of the role at the work with oneself in the actor training program of the stanislavsky school called the bible about the reenactment acting which is the most basic study of the performance, and in the circumstance of theatrical circles of Korea, which relatively have a lack of the research as mentioned earlier, it described the necessity, usefulness and types of the observation as well as methods of a stepwise observation. First of all, actors should capture observing targets suitable for a role in the play, and if the targets were captured, he needs to imitate and then learn it by using his own body In addition, it must go through the process of an extended application by an adjustment, an amplification, and the application depending on the circumstances of the role after understanding the principle of physical behavior. Also, in order to overcome the simple duplication of outward appearance, making it his own should be conducted through the process of learning it by body and identification by attempting empathy, and for become not the process of the observations which can be partially and fragmentarily finished but the whole acts handling the whole play, it requires the actors to continuously make efforts to create the role, designed to be appropriate for the role while comprehensively arranging each behavior of fragmented figures.

• Proceedings of the Korean Society of Embryo Transfer Conference
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• 2002.11a
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• pp.106-106
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• 2002

미토콘드리아는 세포내의 에너지대사에서 중요한 역할을 수행하는 세포내 소기관이며, 자체의 유전물질이 모계를 통해 유전되는 특징을 가지고 있다. 포유류 초기 배아의 발생과정에서 미토콘드리아의 역할과 기능에 대한 연구는 미진한 상태이다. 본 연구에서는 생쥐 초기 배아의 발생과정에서 관찰할 수 있는 미토콘드리아 미세구조의 변화 양상을 살펴보고, 이와 초기 배아의 발생 능력과의 관련성을 밝혀보고자 하였다. 과배란 유도된 ICR 생쥐로부터 배란된 난자와 2-세포기 배아를 수획하여 76 배양액으로 포배기까지 체외배양하면서, 각각의 발생단계에 따라 시료를 수획하였다. 미토콘드리아 미세구조의 변화는 일반적인 투과전자현미경방법(TEM)을 이용하여 관찰하였다. 미토콘드리아의 미세구조는 배란 난자에서 4-세포기 배아까지는 구형이고 크리스타가 발달하지 않은 원시형태였지만, 포배기로 발달함에 따라 크리스타가 발달된 막대형의 전형적인 미토콘드리아로 분화됨이 관찰되었다. 체외배양 중에 발생이 지연되거나 정지된 배아에서 관찰한 미토콘드리아의 미세구조는 공포화 (vacuolization), 크리스타 발달 지연, 손상된 미토콘드리아의 세포막 등과 같은 비정상적인 변형을 관찰할 수 있었다. 또한, 극체에 존재하는 미토콘드리아의 미세구조는 정상적인 핵내의 유전자와의 상호작용이 없어 미분화 상태로 포배기까지 유지되는 것을 관찰하였다. 이상의 결과를 통해 미토콘드리아의 정상적인 분화 과정이 초기 배아의 발생능력과 관련되어 있음을 알 수 있었으며, 포유류 초기 배아의 체외배양시스템을 개선하는데 미토콘드리아 미세구조의 관찰과 변화에 대한 고려가 있어야 될 것으로 생각된다. buffer A 용액으로 세척하여 유리 petri dish의 바닥에 부착된 macrophage만을 cell scraper로 분리하였다. 분리한 macrophage는 0.5-1 $\times$ $10^{6}$ cells/$m\ell$가 되게 조정하여, IL-I 을 0.001, 0.01, 0.1 또한 1 ng/$m\ell$를 첨가하여 농도에 따른 효과를 조사하였고, 각각 24, 48, 72, 96 또한 120시간을 배양하여 시간에 의한 효과도 실시하였다. 각 배치구에서 얻어진 배양액은 TGF-$\beta$를 조사하기 전까지 -2$0^{\circ}C$에 동결 보존하였다. TGF-$\beta$의 측정은 TGF-$\beta$ kit(promega, USA)를 이용하여 실시하였으며, 통계학적 분석은 Anova test를 Statview program을 이용하여 분석하였다. 시험의 결과 대조구에 비해 IL-I 첨가구는 2-3배의 TGF-$\beta$생산을 보였으며, 배양시간에 따른 생산은 시간이 지남에 따라 약간 상승하는 경향을 보였으나, 유의적인 차이를 보이지는 않았다. 또한 IL-I의 농도에 따른 생산의 변화는 IL-I의 농도에 따라 약간의 차이를 보였고 유의적인 차이는 인정되지 않았다. 임신 및 비임신의 경우 임신우의 비장 macrophage가 비임신보다는 약간 상승하는 거스로 나타났다. 이상의 결과로 볼 때 IL-I $\alpha$ 는$\bet

• Tunnel and Underground Space
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• v.32 no.2
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• pp.131-143
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• 2022

The lunar exploration autonomous vehicle operates based on the lunar topography information obtained from real-time image characterization. For highly accurate topography characterization, a large number of training images with various background conditions are required. Since the real lunar topography images are difficult to obtain, it should be helpful to be able to generate mimic lunar image data artificially on the basis of the planetary analogs site images and real lunar images available. In this study, we aim to artificially create lunar topography images by using the location information-based style transfer algorithm known as Wavelet Correct Transform (WCT2). We conducted comparative experiments using lunar analog site images and real lunar topography images taken during China's and America's lunar-exploring projects (i.e., Chang'e and Apollo) to assess the efficacy of our suggested approach. The results show that the proposed techniques can create realistic images, which preserve the topography information of the analog site image while still showing the same condition as an image taken on lunar surface. The proposed algorithm also outperforms a conventional algorithm, Deep Photo Style Transfer (DPST) in terms of temporal and visual aspects. For future work, we intend to use the generated styled image data in combination with real image data for training lunar topography objects to be applied for topographic detection and segmentation. It is expected that this approach can significantly improve the performance of detection and segmentation models on real lunar topography images.

• Journal of the Korean Society of Food Science and Nutrition
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• v.43 no.4
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• pp.624-629
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• 2014

Obesity is the leading metabolic disease in industrialized countries and is closely associated with coronary heart disease, hypertension, diabetes, and cancer. The objective of this study was to evaluate the anti-adipogenic effects of two roasted coffee beans, Vietnam robusta (VR) and Ethiopia Mocha Sidamo G2 (ES), as well as fermented coffee beans with Monascus ruber (MR) mycelium on differentiation of 3T3-L1 preadipocytes. Treatments with 1,000 ${\mu}g/mL$ of hot water extract from coffee beans significantly reduced intracellular lipid accumulation. In addition, VR more effectively inhibited transcription factors such as $PPAR{\gamma}$, $C/EBP{\alpha}$, FAS, and aP2 compared to ES. Further, ES fermented with MR showed more effective anti-adipogenic activity than non-fermented ES. These results suggest that VR and ES inhibit adipocyte differentiation which may contribute to their anti-adipogenic properties.

• Journal of Digital Convergence
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• v.15 no.12
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• pp.469-475
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• 2017

This study explores the characteristics of modern city and public design viewed from the perspective of multiplex culture. This study applied positivist research methods such as relevant literature survey and various theoretical reviews for the study of modern city and culture. The purpose of this study is to discuss the culture and multiplex culture, and explore the relationship between modern city and public design accordingly. As a result, this study analyzed the case of Starfield COEX as a typical complex cultural space in Korea and reinterpreted it as a concept of public design. However, this study has limitations that cannot provide empirical cases to support the theoretical discussion in the concept definition of the complex culture of Korea. So, It will investigate and supplement actual cases through a follow - up study of the study on the multiplex cultural space of modern cities.