• 한국항해항만학회:학술대회논문집
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• 한국항해항만학회 2006년도 춘계학술대회 및 창립 30주년 심포지엄(논문집)
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• pp.355-360
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• 2006

컨테이너 크레인용 쐐기형 레일클램프에서 조 패드의 초기 압착력은 라커의 물림각 설정 후 라커를 체결 시 주요 부품의 변형량에 의해서 결정된다. 이때 여러 인자들로 인해 쐐기 프레임의 저항력이 발생하게 되면, 인장봉의 변형을 감소시켜 초기 압착력 설정을 위한 라커의 물림각이 변하게 된다. 이러한 쐐기 프레임의 저항력은 롤러와 쐐기사이의 편심거리와 쐐기 프레임과 외곽 프레임 사이의 틈새에 따라 결정된다. 본 연구에서는 초기압착단계에서 인장봉에 전달되는 인장력을 실험을 통하여 측정함으로써 쐐기 프레임의 저항력이 라커의 쐐기형 레일클램프의 압착력에 미치는 영향을 평가하고자 한다.

• 한국기계가공학회지
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• 제6권3호
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• pp.58-64
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• 2007

The clamping force of a jaw pad is determined by the displacements of main part when two lockers are locked, after the clamping angle of a locker was set up in the wedge type rail clamp for a container crane. In this time, if the resistance of wedge frame generates due to several factors, the clamping angle of a locker to display the initial clamping force will be changed because of the reduction of displacement of extension bar. This resistance is determined by the eccentric distance between the roller and the wedge, and by the gap between the wedge frame and outer frame. In this study we measured the tensile force of both extension bar through the performance test of the prototype rail clamp in order to evaluate the effect of the resistance of wedge frame on the clamping force of the wedge type rail clamp.

• 전자공학회논문지
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• 제52권5호
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• pp.85-91
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• 2015

기존의 프레임율 증가 변환 알고리즘의 경우 움직임 추정을 위해 정방형의 블록을 사용하며, 임의의 형태를 갖는 물체의 경계를 정확하게 구분할 수 없어 정확한 움직임 벡터를 찾는데 한계가 있었다. 이에 반해 제안하는 비정방형 블록 분할 알고리즘은 텍스처 정보를 이용하여 블록을 두 개의 비정방형 블록으로 분할하여 실제 물체의 경계를 찾는데 적합하다. 또한 주변 블록의 분할 방법에 따라 선택적으로 움직임 벡터를 참조하는 알고리즘을 제안함으로써, 아웃라이어(Outlier)를 방지하고 실제 움직임 벡터를 찾는데 탁월한 성능을 보인다. 실험 결과 제안하는 알고리즘은 기존대비 평균 20-40%의 연산량으로 최대 2.03dB 높은 PSNR 성능을 보이는 것을 확인하였으며, SSIM 비교에서는 최대 0.0214의 향상을 확인하였다.

• Journal of Chest Surgery
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• 제27권4호
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• pp.328-330
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• 1994

Brachial plexus injury developing after axillary thoracotomy is an uncommon complication. But if it occurs, it may cause annoying events. We recently experienced 2 patients who developed brachial plexus injury after wedge resection by axillary thoracotomy . The first patient was a 22 year-old man with right spontaneous pneumothorax . After wedge resection of the right upper lung by axillary thoracotomy, he complained total paralysis of the right arm. An electromyogram was obtained at 7 days after operation, with the confirmation of brachial plexus injury. He was discharged at 22days after operation and brachial plexus injury was completely recovered 4 months after discharge. The second patient was a 17 year-old man with recurrent right pneumothorax. He underwent wedge resection of the right upper lung by axillary thoracotomy. Electromyogram confirmed the diagnosis of brachial plexus injury in the immediate postoperative period. He was discharged at 15 days after operation and brachial plexus injury was recovered 2months after discharge.Brachial plexus injury after axillary thoracotomy is caused by stretching around the clavicle and tendon of pectoralis minor by fixation of the abducted arm to the frame. Thus, when we perform wedge resection by axillary thoracotomy, we must avoid over-stretching of the brachial plexus in positioning. If brachial plexus injury develops, immediate attention and management with close rapport are important to avoid possible medicolegal problems.

• 천문학회보
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• 제42권2호
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• pp.44.2-44.2
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• 2017

We obtained near-infrared spectra of 26 SDSS quasars at 0.7${\sim}10^{{\wedge}{10}}M{\odot}$ to critically examine the systematic effects involved with their mass estimations. We find that active galactic nuclei (AGNs) heavier than $10^{{\wedge}{10}}M{\odot}$ often display double-peaked $H{\alpha}$ emission, extremely broad FeII complex emission around MgII, and highly blueshifted and broadened CIV emission. The weight of this evidence, combined with previous studies, cautions against the use of MBH values based on any emission line with a width over 8000 km/s. Also, the MBH estimations are not positively biased along the presence of ionized narrow line outflows, anisotropic radiation, or the use of line FWHM instead of ${\sigma}$ for our sample, and unbiased with variability, scatter in broad line equivalent width, or obscuration for general type-1 quasars. Removing the systematically uncertain MBH values, ${\sim}10^{{\wedge}{10}}M{\odot}$ BHs in 1${\sim}10^{{\wedge}{9.5}}M{\odot}$ BHs, although current observations support they are intrinsically most massive, and overmassive to the host's bulge mass.

• 한국정밀공학회:학술대회논문집
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• 한국정밀공학회 2000년도 추계학술대회 논문집
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• pp.559-562
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• 2000

Bending is one of the most common cold-stamping operations, recently it is many used to produce structural frame. Depending on the shape and dimensions of complex structural frame, a successive bending operation with simple dies may be economic. But, in this paper, it has been focused to reduce the bending operations by a successive-action compound die. Designed compound-die consists of blank-holder, cam, wedge and etc. In the result, this compound-die for structural frame enabled that it makes seven bending processes into one process, and improved productivity.

• Structural Engineering and Mechanics
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• 제52권3호
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• pp.541-558
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• 2014

A 1/4-scale two-bay eight-storey reinforced concrete frame was tested on shaking table. Initial shaking table tests were carried out through a set of real seismic excitations to investigate the seismic behavior of the RC frame. Subsequently, the damaged frame was repaired using epoxy injection technique, and then subjected to the tests with the same records. The purpose of this study was to investigate experimentally the dynamic characteristics, cracking pattern and lateral inter-story stiffness of RC frames using epoxy injection technique. The test results indicate that epoxy-injection technique appears to be a satisfactory method for repairing earthquake-damaged structure.

• 한국전산유체공학회지
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• 제17권3호
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• pp.18-24
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• 2012

The aerodynamic performance of the pantograph on a high speed train was compared for different pantograph covers which are designed to block the aero-acoustic noise from the pantograph. For the study, two types of cover are designed: wedge and cone types. The lift force of pantograph with cover was compared with the force of pantograph only. The comparison clarified that the cone type cover increases the sideslip angle of the flow and decreases the lift force considerably. However, the wedge type cover changes the flow direction upward and increases the lift force of the pan head. This increment of lift force compensates the decrement of lift force caused by the blocking of the flow into the pantograph lower frame due to cover. Therefore, in case of the wedge type cover, the overall lift force changes slightly compared with the cone type cover.

• 대한조선학회지
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• 제24권1호
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• pp.17-28
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• 1987

The materials to develop a computer-based method for the wave resistance of a ship within the frame of Guilloton's wedge concept are presented in this paper. A systematic reliable procedure to retrieve the linearized hull corresponding to a given real hull form(the so-called inverse transformation) has been devised. The algorithm based on the present materials produces evidently accurate values of the H-functions, and the wave profiles and the wave resistance coefficients in good agreement with the experimental measurements.

• 한국건축시공학회:학술대회논문집
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• 한국건축시공학회 2006년도 추계 학술논문 발표대회 논문집
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• pp.123-126
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• 2006

Existing Deck Plate for a one of system forms, there is various advantage and application actual results increasing rapidly. But design of deck is depending on engineering data collections or design data on deck manufacture ordinarily. When construct, is responsible for deflection occurrence, And Because confirmation of crack occurrence region is impossible, there is difficulty of repair, reinforcement about crack and water leakage. According to got following conclusion as result that economic performance, preservation administration and repair reinforcement develops easy using steel truss snap tie by wedge pin on coating plywood that is slab Panel Wood System Form method of construction there is Deck Plate's advantage. (1) In stab lower part is exposed disjointing in which a criminal is fastened to be interrogated after construction acceptance and repair, reinforcement of crack is possible (2) Construction cost curtailment effect of about 29.2% than conventional type and about 10% than deck plate (3) Construction period reduction of about 3 day than conventional type and about 0.3 day than deck plate (4) Labor curtailment effect more than about $29{\sim}50%$ from conventional type