• IEMEK Journal of Embedded Systems and Applications
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• v.7 no.1
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• pp.9-15
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• 2012

Recently, as the development of 3D contents service, production of 4D media that user can feel physical effects by the scene of movie has been increased. This 4D media uses the SMMD (Single Media Multiple Devices) method to give users enhanced effects with multiple devices playing rather than the SMSD (Single Media Single Device) method with single device playing in a smart TV environment. To give more sensible effects to users, from the beginning of making one media, we produced 4D media that consists of 3D contents and the SEM (Sensory Effect Metadata) to define effects of the scene. 4D media is transmitted to a HS (Home Server) to represent 3D contents in 3DTV and multiple devices with synchronized way. In this paper, we suggested the concept and overall 4D media broadcasting service system architecture, aggregator time acquisition, media time scheduling, real-sense device scheduling, evaluation results, user interfaces and implemented devices.

• Proceedings of the Korean Society of Broadcast Engineers Conference
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• 2013.11a
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• pp.124-127
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• 2013

2009년 출시된 영화 "AVATAR"가 stereoscopic방식 3D영화로 대단한 성공을 거둔 이후로 가전시장과 필름 시장에는 많은 3D 영상들이 stereoscopic방식으로 제작되어 유통되게 되었다. 하지만 기존에 제시되어온 two lens stereoscopic camera system은 두 대의 카메라를 사용하기 때문에 광학적 정렬과 기하학적 조절이 매우 어렵기 때문에 stereoscopic 영상을 촬영하고 보급 하는데 많은 문제점을 가지고 있었다. 따라서 하나의 광축을 가진 single lens stereoscopic camera system들이 기존에 제시되어 왔으나 여전히 single lens stereoscopic system에도 문제점이 존재한다. 이에 본 논문에서는 기존에 제시된 stereoscopic camera system을 two lens / single lens로 나누어 조사 분석하고, 분석한 문제점을 해결하기 위한 새로운 single lens stereoscopic camera system을 제안할 것이다.

• Journal of Broadcast Engineering
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• v.27 no.3
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• pp.437-450
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• 2022

Generative adversarial networks(GANs) have demonstrated remarkable success in image synthesis. However, since GANs show instability in the training stage on large datasets, it is difficult to apply to various application fields. A single image GAN is a field that generates various images by learning the internal distribution of a single image. In this paper, we investigate five Single Image GAN: SinGAN, ConSinGAN, InGAN, DeepSIM, and One-Shot GAN. We compare the performance of each model and analyze the pros and cons of a single image GAN.

• Journal of the Korean GEO-environmental Society
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• v.2 no.1
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• pp.31-35
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• 2001

The effects of the ratio of effective size of filter media and diatom size on filter run time were evaluated by using both reported data and experimental results from several water treatment plants. For single media at several WTPs, the range of probability of the filter run time less than 15hr was 10~60%, and for dual media, that of the filter run time less than 30hr was 10~20%. The major filter clogging algae was Synedra acus of which dominant ratio was in the range of 64~92%. The effective size(ES) of filter medium for dual media filter was 0.71~1.40mm and uniformity coefficient of the filter was 1.25~1.67. The effective size(ES) of filter medium for single medium filter was 0.52~0.65mm and uniformity coefficient of the filter was 0.25~1.40. The range of calculated penetration depth was 2.58~15.4cm for dual media and 1.29~2.17cm for single media, and average filter run time was 40.1~83.3hr and 13.9~34.9hr, respectively. When Synedra counts were over 400cells/ml for single media, filter run time was below 5hr, while filter run time for dual media filter, remained as high as 70hr.

• Journal of the Korean Society of Child Welfare
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• no.56
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• pp.221-251
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• 2016

The purpose of this study was to examine whether single-parent family status affects children's school adjustment through children's self-care and media exposure. In addition, the study investigated the mediating effects of self-protection and media exposure of children by analyzing whether single-parent family status has effects on school adjustment through self-care and media exposure of children. For this purpose, we used data of 1,916 students in the 4th grade who participated in the 4th year of the Korean Children and Youth Panel Survey (KCYPS). The results of the structural equation modeling showed that single-parent family environment not only had direct effects on the school adjustment, but also had effects on school adjustment through self-care of children. In addition, it was revealed that self-care of children influenced school adjustment through media exposure. One of the covariates, monthly income of households, did not affect the level of children's self-care. This result draws attention to the problems of the structural deficit of single-parent families. Therefore, political measures that correspond to the structural characteristics and special needs of single-parent families, along with their current financial support, are needed to improve the level of school adjustment of children from single-parent families.

• Advances in concrete construction
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• v.10 no.2
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• pp.141-149
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• 2020

In the present study, a mechanical model is applied to account the effects of the surrounding viscoelastic media on the buckling behavior of single microfilament within the cell. The model immeasurably associates filament's bending rigidity, neighboring system elasticity, and cytosol viscosity with buckling wavelengths, buckling growth rates and buckling amplitudes of the filament. Cytoskeleton components in living cell bear large compressive force and are responsible in maintaining the cell shape. Actually these filaments are surrounded by viscoelastic media consisting of other filaments network and viscous cytosole within the cell. This surrounding, viscoelastic media affects the buckling behavior of these filaments when external force is applied on these filaments. The obtained results, indicate that the coupling of viscoelastic media with the viscous cytosol greatly affect the buckling behavior of microfilament. The buckling forces increased with the increase in the intensity of surrounding viscoelastic media.

• ETRI Journal
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• v.36 no.2
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• pp.188-196
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• 2014

This paper describes a simple delay diversity technique for terrestrial digital multimedia broadcasting (T-DMB) and digital audio broadcasting in a single-frequency network (SFN). For the diversity technique, a delay diversity scheme is adopted. In the delay diversity scheme, a non-delayed signal is transmitted in the first antenna, and delayed versions of the signal are transmitted in each additional antenna. For an SFN environment with multiple transmitters, delay diversity can be executed by controlling the emission times of the transmitters. This SFN delay diversity scheme does not require any hardware changes in either the transmitter or receiver, and perfect backward compatibility can be acquired. To evaluate the performance improvement, laboratory tests are executed with various types of commercial T-DMB receivers as well as a measurement receiver. The improvement in the bit error rate performance is evaluated using a measurement receiver, and an improvement of the threshold of visibility value is evaluated for commercial receivers. Test results show that the T-DMB system can obtain diversity gain using the described technique.

• The Journal of the Korea Contents Association
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• v.18 no.10
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• pp.65-77
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• 2018

Recently, the number of 'single-person household' is increasing rapidly. It brings about changes in the societal cultural aspect. Examples of television programs focused on their lifestyle provoked the societal attention as a important social agenda. This research investigated to figure out inherent ideologies in of tvN through Semiotic and Discourse analyses. As a result, predominant ideologies were revealed on the basis of representations of such single-person households. The authors also tried to find out how the media represent attitudes of single-person households and figure out how the media approach their ways of lives on bases of specific discourses and ideologies.

• Proceedings of the IEEK Conference
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• 2005.11a
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• pp.1105-1108
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• 2005

Media service model is divided into 3 models that are Client Pull, Server Push, and IPP(Interleaving Pull & Push) model. In most single VOD(Video On Demand) environment, Client Pull model was sufficient to play the movie Because most media contents has a low bitrate and resolution. But according to an increment of the demand of the high definition media, Client Pull model is not sufficient. Parallel VOD environment is made of several of VOD servers and provides the parallel media stream simultaneously for one client. We compared and analyzed the performance of service models with respect to network delay and data size in buffer in the single and parallel VOD environment and we found that IPP service model keeps the least network delay and stable client buffer state in the parallel VOD environment.

• ETRI Journal
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• v.39 no.3
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• pp.310-318
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• 2017

Unified speech and audio coding (USAC) is one of the latest coding technologies. It is based on a switchable coding structure, and has demonstrated the highest levels of performance for both speech and music contents. In this paper, we propose an extended version of USAC with a single-mode of operation-which does not require a switching system-by extending the linear prediction-coding mode. The main concept of this extension is the adoption of the advantages of frequency-domain coding schemes, such as windowing and transition control. Subjective test results indicate that the proposed scheme covers speech, music, and mixed streams with adequate levels of performance. The obtained quality levels are comparable with those of USAC.