• Proceedings of the Korean Society of Broadcast Engineers Conference
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• 2015.07a
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• pp.137-138
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• 2015

IT 기기와 서비스가 보편화되고 있는 시점에 사용자 인터페이스의 중요성은 날이 갈수록 중요해지고 있다. 사용자가 특정한 일을 하기 위해서는 반드시 인터페이스를 통해 시스템과 의사소통해야하며 인터페이스가 얼마나 편리하고 친근한가에 따라 작업의 효율성도 달라진다. 그러므로 인터페이스는 사용자와 시스템 간의 원활한 의사소통을 통해 정확한 업무 수행하기 위한 요소로 매우 중요하다. 이러한 분위기 속에서 다양한 IT 기기가 등장하면서 이에 따른 UI 트렌드도 변화하고 있다. 최근 UI 트렌드로는 대표적으로 Responsive UI(반응형 UI)를 비롯해 Metro UI, Tile Layout 등이 있다. 하지만 이러한 UI만으로는 소상공인들 위한 홍보 영상 제작 플랫폼(이하 Ad-it)에서 홍보 영상을 만들기 위한 미디어 리소스 수집하는 데에 어려움이 존재한다. 소상공인의 주요 연령대가 40~50대라는 점을 감안하여 사용자의 IT 기술 친숙도를 반영하지 않았기 때문이다. 이러한 문제점을 해결하고자 본 논문에서는 홍보 영상 리소스 수집을 위해 소상공인이 쉽게 따라올 수 있도록 단계별로 나누어진 Step UI 개념을 도입하여 홍보 영상 제작에 필요한 미디어 리소스를 수집을 위한 Step UI를 구현하였다.

• KIEAE Journal
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• v.16 no.3
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• pp.95-101
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• 2016

Purpose: Recently, high-rise buildings are popular in korea due to high rate of land usage and cost performance in urban area. However, high-rise building causes several problems such as safety issues, cooling/heating load, stack effect, disaster prevention etc. The stack effect is one of the representative problems. Even though there are many researches on stack effect, there are few studies on design guideline considering local condition. Method: This study focuses on the change of pressure distribution according to the design factors which affects the airflow in high-rise residential buildings by simulation analysis. In this study, city, building floor, stairwell door leakage area, elevator door leakage area and changes of layout were considered ad the design factor. Result: The simulation results indicate that building height and ambient air temperature are significant design factor for stack effect.

• Nuclear Engineering and Technology
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• v.51 no.3
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• pp.884-893
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• 2019

Spent fuel racks are steel structures used in the storage of the spent fuel removed from the nuclear power reactor. Rack units are submerged in the depths of the spent fuel pool to keep the fuel cool. Their free-standing design isolates their bases from the pool floor reducing structural stresses in case of seismic event. However, these singular features complicate their seismic analysis which involves a transient dynamic response with geometrical nonlinearities and fluid-structure interactions. An accurate estimation of the response is essential to achieve a safe pool layout and a reliable structural design. An analysis methodology based on the hydrodynamic mass concept and implicit integration algorithms was developed ad-hoc, but some dispersion of results still remains. In order to validate the analysis methodology, vibration tests are carried out on a reduced scale mock-up of a 2-rack system. The two rack mockups are submerged in free-standing conditions inside a rigid pool tank loaded with fake fuel assemblies and subjected to accelerations on a unidirectional shaking table. This article compares the experimental data with the numerical outputs of a finite element model built in ANSYS Mechanical. The in-phase motion of both units is highlighted and the water coupling effect is detailed. Results show a good agreement validating the methodology.

• Journal of Korea Multimedia Society
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• v.12 no.3
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• pp.329-334
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• 2009

When an optical disc is being played. the pick-up converts light to analog signal at first. The analog signal is equalized for removing the inter-symbol interference and then the equalized analog signal is converted into the digital signal for extracting the synchronized data and clock signals. There are a lot of algorithms that minimize the BER in extracting the synchronized data and clock when high. density optical disc like BD is being played in low speed. But if the high-density optical disc is played in high speed, it is difficult to adopt the same extraction algorithm to data PLL and PRML architecture used in low speed application. It is because the signal with more than 800MHz should be processed in those architectures. Generally, in the 0.13-${\mu}m$ CMOS technology, it is necessary to have the high speed analog cores and lots of efforts to layout. In this paper, the parallel data PLL and PRML architecture, which enable to process in BD 8x speed of the maximum speed of the high-density optical disc as the extracting data and clock circuit, is proposed. Test results show that the proposed architecture is well operated without processing error at BD 8x speed.