• Journal of Korean Society of Steel Construction
• /
• v.25 no.6
• /
• pp.623-634
• /
• 2013

In this study, the structure behavior of RC slab and SC shear wall connection was investigated. Also experimental study was performed to evaluate the factor of safety of demand shear connection strength in KEPIC SNG Standard. As a result, shear friction strength of connection was known about 300kN and shear strength of rebar increased according to the displacement increase. With the installment of the lower rebars, 40% shear strength increased compared to the non-rebar specimen.

• Journal of the Korea Institute of Information and Communication Engineering
• /
• v.23 no.8
• /
• pp.981-987
• /
• 2019

In this paper, we propose a new SC-FDE (single carrier frequency domain equalization) structure to cope with narrow band interference signals or jammers and reduce pilot overhead. The conventional SC-FDE structure has a problem that the receiver performance degrades severely due to difficulty in time-domain channel estimation when narrow band jammers exist. In addition, the spectral efficiency is lowered by transmitting pilot at every SC-FDE block to estimate channel response. In order to overcome those problems, the proposed structure is devised to estimate frequency domain channel directly without time domain channel estimation. To reduce the pilot overhead, several data blocks are transmitted between two pilots. The channel estimate of each data block is found through linear interpolation of two channel estimates at two pilots. By performing frequency domain channel equalization using this channel estimate, the distortion by the channel is well compensated when narrow band jammers exist. The performance of the proposed structure is confirmed by computer simulation.

• Computational Structural Engineering
• /
• v.24 no.4
• /
• pp.32-39
• /
• 2011

• Nuclear industry
• /
• v.29 no.4
• /
• pp.49-53
• /
• 2009

• Journal of the Institute of Electronics Engineers of Korea SC
• /
• v.46 no.3
• /
• pp.31-35
• /
• 2009

In this paper, tunable 4th order SC(switched capacitor) bandpass ${\sigma}-{\Delta}$(Sigma-Delta) modulator with advanced architecture that can adjust the IF by two coefficient values is proposed for data conversion in the wireless communication. Its architecture can optionally adjust all the 4th order noise transfer function in comparison with the conventional architecture. In order to adjust the IF, the conventional architecture needs the four variable coefficients values, basic clocks and eight clocks. On the other hand, the proposed architecture can adjust the IF by two variable coefficient values and basic clocks only.

• Korean Journal of Crystallography
• /
• v.9 no.1
• /
• pp.21-29
• /
• 1998

The rare-earth orthoborate family, RM3(BO3)4 is known to be the most promising material for the microlaser host. To grow LaSc3(BO3)4 single crystal, the phase relation of the system LaBO3-ScBO3 was investigated by DTA method. LaSc(BO3)4 was the unique intermediate compound in the binary system the peritectic reaction point of which was 1495 ±2℃. Owing to the peritectic behavior of the compound, the crystal growth of the rare-earth Sc-borate was carried out by pulling from the melt-soultion of La1+xSc3-x(BO3)4. The optimal conditions for the growth of LaSc3(BO3)4 were determined by traditional CZ method : pulling speed 0.7mm/hr, rotation speed 7-10 rpm under reduction condition. Pt and Ir crucibles could be used for about 8-10 times of growth. The effect of thermal configurations on the temperature distribution was investigated. A special two-coordinate manipulator was made for the precise movement of thermocouples from the melt to the top of the furnace for several thermal configurations. The radial gradient on the melt surface depends strongly on the construction of the afterheater. On the other hand, the axial gradient was mainly propotional to both the opening degree of baffle plate and the mutual positions of crucible and heater.

• Journal of the Korea institute for structural maintenance and inspection
• /
• v.10 no.1
• /
• pp.197-204
• /
• 2006

This experimental study of prominent section bending behavior beam without shear connector provides bond capacity between concrete profile and initial stiffness of SC beam by comparing the test result with a theological analysis result and an ANSYS(common structural analysis program) analysis result. The compared result provides a fundamental study for practical use of efficient SC beam. Test result indicates 88%-98% rate of theological result in moment capacity and composition ratio shows 30%-70%. In other words, the results are insufficient to make a complete composite action. Therefore, it is need to make pull shear connection of connection method.

• Proceedings of the Korean Society for Noise and Vibration Engineering Conference
• /
• 2000.06a
• /
• pp.218-221
• /
• 2000

1999년 5월 4일부터 5월 7일까지 덴마크 오덴스에서 개최되었던 18차 ISO TC108/SC2 (기계 차량 구조물의 기계 진동 충격의 측정 및 평가) 총회내용 및 결의사항과 최근 진행되고 있는 ISO TC108/SC2 산하 규격 제 개정 동향에 대하여 살펴본다.

• Proceedings of the Korea Concrete Institute Conference
• /
• 2008.11a
• /
• pp.65-68
• /
• 2008

This is an experimental study on the out of plane load behavior of SC (Steel Plate Concrete) wall module under bending and shear loading. 4 tests were conducted to verify structural performance according to rib reinforcement ratio, stud reinforcement ratio and shear reinforcement ratio. On the basis of test results, it is found that rib reinforcement ratio is a main factor of flexural strength of SC structures.

• Proceedings of the Korean Society of Broadcast Engineers Conference
• /
• 2020.11a
• /
• pp.208-209
• /
• 2020

ISO/IEC JTC 1/SC 29(멀티미디어부호화) WG 11(MPEG)에서는 미디어 산업 전반에 대한 표준화를 다루고 있으며 해당 산업과 연관된 다양한 기관들과의 교류가 진행되고 있으나, 작업반(WG)이란 한계와 현행 ISO/IEC 규정에 의해 다양한 표준화 단체들과의 교류에 많은 제한이 있었다. 이에, 2019년 7월 관련 임시 작업반(AhG)이 설립되어 구조조정에 대한 논의를 진행했으며, 2020년 7월에 열린 37차 JTC 1/SC 29 총회에서 기존 WG 11을 폐지하고 새로운 작업반을 신설했다. 이에 본 논문은 JTC 1/SC 29/WG 10(MPEG) 구조조정 결과 및 신설 작업반의 구조와 표준화 동향을 알아본다.