• International Journal of Internet, Broadcasting and Communication
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• v.16 no.4
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• pp.367-374
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• 2024

With the continuous progress of science and technology, the film industry is rapidly developing in the direction of digitalization and intelligence, thereby the concept of "film industrialization" being also mentioned more and more frequently. The continuous development of digital special effects technology has brought brand new changes to Chinese film industry and became an indispensable part of the modern film production. This study analyzed the impact of the development of digital special effects technology on film industry and the practical experience of Chinese film industrial ization by taking the Wandering Earth series as an example. The industrialization development trend of Chinese films was elaborated in terms of standardization of post-production visual effects process, specialization of production industry standard, and promotion of standardization of film industry. The key founding of this study is that digital special effects technology has not only changed the visual effects of films, but has also profoundly influenced the production mode and market pattern of the film industry. Therefore, we see digital effects technology as both irreplaceable and full of potential in modern film production. In our work, digital special effects play a pivotal role in advancing film industrialization. We anticipate that, as digital effects technology continues to evolve, China will make significant strides in film industrialization, providing robust support for the ongoing growth and prosperity of the market.

• Nuclear Engineering and Technology
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• v.52 no.6
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• pp.1180-1187
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• 2020

A team of operators is required for nuclear power plant operation, and communication between the operators is an important aspect of the team's ability to successfully carry out tasks. It has been difficult to evaluate the quality of this communication though, and as the relationship between communication quality and team performance has yet to be clarified, it has not been applied to most human reliability analysis (HRA) methodologies. This study investigates the relationship between the quality of communication and team performance using data from a full-scope training simulator of a digital main control room (MCR). Two important characteristics of communication were considered to determine quality: each operator's ability to self-confirm the status of a given task in a digital MCR, and the type of communication, as divided into 1-way, 2-way, and 3-way between operators. To measure team performance, the concept of an unsafe act was employed, which is defined as a human error that has the potential to negatively affect plant safety. Analysis results showed that the communication quality and team performance were related to each other. With this more clearly defined relationship, the results of this study can be applied to related performance shaping factors to improve HRA.

• The Journal of the Acoustical Society of Korea
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• v.28 no.8
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• pp.768-773
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• 2009

This paper demonstrates the digital communication in air using the parametric array. The stepped-plate transducer which is suitable for high-power and high-efficient radiation is used to generate the difference frequency wave with the parametric array. The primary frequencies are selected to 83 kHz and 122 kHz and the resulting difference frequency wave at the frequency of 39 kHz is used for the communication. The modulation method is selected to On-Off Keying method. The waveform and signal-to-noise ratio (SNR) is measured and analyzed to see the characteristics of the digital communication using the parametric array. The proper distance for the communication using parametric array is about 3 m. The measured beam width of the 3dB SNR reduction was $14^{\circ}$. The possibility of the communication in air using the parametric array is confirmed and the high directional characteristic of the communication using the parametric array is expected to have the advantages for the multi path and the security problems.

• Journal of Korean Library and Information Science Society
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• v.35 no.2
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• pp.219-241
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• 2004

The OAI(Open Archives Initiative) is an evolving protocol and philosophy regarding interoperability for digital libraries. This protocol has its roots in an effort to enhance access to digital libraries as a means of increasing the availability of scholarship communication. Thus, this research outlines the history of the OAI protocol, the basic model of SP(service provider)/DP(data provider), and the prerequisites to implement the OAI protocol. Viewed in this light, this paper also describes the experiences of KERIS project of SP/DP model and lists the differences between prerequisites and KERIS case.

• Annual Conference of KIPS
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• 2003.05b
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• pp.1289-1292
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• 2003

고속 대용량의 통합된 정보를 전송하기 위한 기간망(backbone network)과 가입자망(access network) 사이에는 병목 현상에 따른 congestion 문제가 불가피하다. 따라서 증가하는 가입자측의 대역폭 수요에 따라 가입자측까지 광케이블의 연결을 현실화할 수 있는 기술로서 PON(Pasive Optical Network)구조가 대두되고 있다. 본 연구는 네트워크 시뮬레이션인 OPNET을 사용하여 기존의 망과 가장 호환이 용이한 ethernet 기술을 이용한 PON 구조의 상향링크에서 ONU내에 traffic 타입에 따른 큐잉 알고리즘을 적용하여 QoS(Qualify of Service)를 보장하고자 한다.

• 제어로봇시스템학회:학술대회논문집
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• 2001.10a
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• pp.113.3-113
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• 2001

In this paper, we have designed the VHDL module of DS/SS QPSK wireless modem processor for digital data communication. The spread spectrum method is used for modern processor, because this method guarantees good frequency efficiency and higher security. Also, it guarantees good performance in digital communication system under multi-path interferences. The differential encoder and decoder are used for simple circuit composition in the signal detection. For the synchronization of receiver, matched filter and power detector are used. And the IF modulation/demodulation of QPSK method is used in the digital level. The transmitter of VHDL modem processor consists of differential encoder, PN code generator, and QPSK ...

• Journal of the Korean Society for Library and Information Science
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• v.37 no.1
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• pp.151-170
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• 2003

Examine the communication between user and librarian in the digital reference services and discuss the limitations and possibilities in the quality of reference interview. Along with a comparison of traditional vs. electronic reference interview, 26 digital reference services in academic libraries were investigated. Some strategies were suggested to improve the quality of user-librarian communication in the process of accessing the service, of question negotiation and of responding to the questions.

• Journal of Korea Society of Digital Industry and Information Management
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• v.16 no.1
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• pp.93-98
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• 2020

Research on underwater sensor networks is increasing due to such reasons as marine resource management, maritime disaster prediction and military protection. Many underwater sensor networks performs wireless communication using an acoustic sound wave band signal having a relatively low frequency. So the digital part of their modem can take charge of carrier band signal processing. To enable this, the sampling rate of the baseband band signal should be increased to a sampling rate at which carrier band signal processing is possible. In this paper, we designed a sampling rate increasing circuit based on a CIC interpolator for underwater sensor nodes. The CIC interpolator has a simple circuit structure. However, since the CIC interpolator has a large attenuation of the pass band and a wide transition band, an inverse sinc LPF is added to compensate for frequency response of the CIC interpolator. The proposed interpolator was verified in time domain and frequency domain using ModelSim and Matlab.

• Proceedings of the Korean Society of Broadcast Engineers Conference
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• 1998.06b
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• pp.73-78
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• 1998

Our platform introduced in this paper is based on DAVIC specifications which define high quality multimedia services with some extensions to provide user friendly and uniform interface to its users. We designed and implemented an integrated service platform for high quality interactive multimedia services, swithed digital broadcasting, and Internet services. The integration in terms of a service provider system, a delivery system, and a service user system is taken into account. Our research results in the development of integrated high quality interactive and digital broadcasting multimedia services with web-based common user interface and its experience will be feedback to the field trial service which will be launched from next year.

• ETRI Journal
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• v.29 no.5
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• pp.607-613
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• 2007

Most signal-to-noise ratio (SNR) estimation techniques in digital communication channels derive the SNR estimates solely from samples of the received signal after the matched filter. They are based on symbol SNR and assume perfect synchronization and intersymbol interference (ISI)-free symbols. In severe channel distortion where ISI is significant, the performance of these estimators badly deteriorates. We propose an SNR estimator which can operate on data samples collected at the front-end of a receiver or at the input to the decision device. This will relax the restrictions over channel distortions and help extend the application of SNR estimators beyond system monitoring. The proposed estimator uses the characteristics of the second order moments of the additive white Gaussian noise digital communication channel and a linear predictor based on the modified-covariance algorithm in estimating the SNR value. The performance of the proposed technique is investigated and compared with other in-service SNR estimators in digital communication channels. The simulated performance is also compared to the Cram$\acute{e}$r-Rao bound as derived at the input of the decision circuit.