• 제어로봇시스템학회논문지
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• 제8권2호
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• pp.151-157
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• 2002

A 3-dimenstional automatic solder paste inspection system is described that can be used to find defects occurring in solder paste printing process. This system extracts height and volume information very fast as well as area of solder paste printed, using multiple slit ray projection and Galvano-mirror scanning. Methods are presented on calibration of camera and slit projector, real-time image processing of multiple slit images, determination of reference height, and extraction of paste height information are proposed. Performance of the system was successfully demonstrated through field tests.

• 대한방사선방어학회:학술대회논문집
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• 대한방사선방어학회 2009년도 추계 학술발표
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• pp.118-119
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• 2009

• Radiation Oncology Journal
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• 제28권4호
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• pp.224-230
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• 2010

목적: 본 연구에서는 콘빔 CT에서 산란선 제거를 위한 aft-multple-slit (AMS) 시스템을 설계하였다. 예비 연구로서 본 시스템의 효용성을 검증하기 위해 MC 시뮬레이션을 수행하였다. 대상 및 방법: 가상 시뮬레이션은 산란선과 산란선+일차선을 계산할 수 있는 MCNPX의 radiography tally 5를 이용하였다. AMS는 빔의 발산성을 고려한 각이 동일한 아크 형태이고, 길이 방향에서의 산란선을 막는다. AMS의 효용성을 위한 평가는 AMS를 사용하지 않았을 때의 일차선과 산란선을 비교함으로써 수행되었다. 2D projection 영상을 얻기 위해 전체의 AMS는 한번의 캔트리 회전 후 AMS에 의해 가려진 부분의 영상 획득을 위해 다시 한 번 회전하는 구조이다. 결과: 일차선의 2D projection 영상은 모든 AMS의 폭에서 그리고 AMS를 사용하지 않았을 때에도 동일하였으나 일차선+산란선의 2D projection 영상은 slit의 폭에 따라 결과가 변했다. Slit의 폭을 5 mm, 10 mm, 15 mm, 20 mm로 하였을 때 평균 산란성 제거율은 29%, 15%, 9%, 8%였다. 결론: 본 연구에서는 AMS를 이용한 콘빔 CT의 산란선 제거 효과를 평가하였다. MC 시뮬레이션을 이용한 본 시스템의 사전 연구에서는 상당한 산란선 제거 효과를 보여주었다.

• 한국연소학회:학술대회논문집
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• 한국연소학회 2005년도 제31회 KOSCO SYMPOSIUM 논문집
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• pp.314-319
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• 2005

In this study, the combustion characteristics were investigated with the variation of design factors on multiple slit gas burner. The design factors consist of slit height, width, spacing, and inner length. The combustion characteristics were made analysis of the CO emission and NOx emission by using CO analyzer and NOx analyzer. The lower perimeter to area and the narrow spacing extends the lift-flame limit. The CO emission increases with the increasing perimeter to area ratio at the same condition. The NOx emission is found to be less significant with the port perimeter to area ratio. The flame interference might highly depend on the spacing and port perimeter to area ratio, and it also affects the burner performance.

• 한국정보통신학회논문지
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• 제13권1호
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• pp.1-5
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• 2009

본 논문에서는 십자형 평판 모노폴 안테나에 L자형 슬릿을 두어 이중공진 및 삼진공진 등 다중 공진 특성이 발생하는 새로운 형태의 안테나 구조를 제안하였다. 십자형 평판 모노폴 안테나 구조에서 다중공진 특성이 발생하도록 하기 위해서는 평판 모노폴 안테나의 높이와 길이를 원하는 공진 주파수에 맞추고, 안테나 표면에 L자형 슬릿을 두어 슬릿의 길이와 슬릿의 개수에 따라 공진 주파수를 여러 개 발생시킨다. 본 논문에서 제안하는 안테나의 장점은 L자형 슬릿의 길이와 개수에 의해 쉽게 특정 주파수 대역에서 다중공진이 발생하도록 설계 가능하다는 것이다. 또한, 공진이 발생하는 주파수에서 모두 무지향성의 방사패턴과 함께 일정 수준 이상의 고이득을 가져 차량용 등 이동체용 안테나에 적합하다.

• 대한기계학회논문집B
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• 제31권6호
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• pp.547-557
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• 2007

This study was conducted to investigate the flow and combustion characteristic of the experimental burner which was manufactured for the reflection of the oven and broil burner features. As slot shape, spacing between slots, and slot arrangement of the exit area which emits the mixing gas are different in case of oven burners and broil turners, the purpose of this study is to know the affection of the flame interaction and combustion characteristic according to the change of shape factors such as slot shape, slot arrangement, and slot-to-slot spacing. With no relation of the slot shape, as the spacing between slots became narrow, the occurrence of a lift-flame was delayed. So the combustion was possible in the leaner region, but the appearance of yellow-tip became a little fast. Slit slot port had the broadest operating range among the other slot shapes. Specially, from the side of lift-flame, as the jet that spreads downstream in the longitudinal slot was nearly circular just a few slot lengths away from the orifice, slot-to-slot spacing of the Slit port was closer than the other ports. These results could be expected through the computer numerical method and had a good agreement. As the spacing between slots increased, in case of Slit and Mix port, NOx emission rate was constant or decreased, but the NOx emission of Hole port was increased. CO emission rate of Slit and Hole port was increased as the slot-to-slot spacing was broadened.

• The Korean Journal of Physiology and Pharmacology
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• 제8권2호
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• pp.111-115
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• 2004

Roundabout (Robo) is the transmembrane receptor for slit, the neuronal guidance molecule. In this study, the tyrosine phosphorylation of Robo was observed in Robo-transfected human embryonic kidney cells and developing rat brains, and found to be increased by the treatment with protein kinase A activator, forskolin. In contrast, protein kinase C activation by phorbol-12-myristate-13-acetate decreased the phosphorylation of Robo. Intracellular calcium was required for the tyrosine phosphorylation. Furthermore, the transfection of an Eph receptor tyrosine kinase dramatically enhanced the tyrosine phosphorylation. These findings indicate that the tyrosine phosphorylation of Robo is regulated by multiple mechanisms, and that Eph receptor kinases may play a role in the regulation of tyrosine phosphorylation of Robo in the rat brain.

• 한국의류학회지
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• 제17권4호
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• pp.539-549
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• 1993

The purpose of this study was to find out the moving fitness and slit length of tight skirt in relation to its length & silhouette. Five kinds of length, micro mini, mini, natural line, medi and maxi, and two kinds of siihuette, slim & straight-a total of ten tight skirts-were investigated. Ten college students were chosen for this experiment. The moving fitness was tested by measuring the step length, step width and step angle in the case of walking on the flat and going up the stairway & bus stair. The slit length was tested by measuring the back slit length needed in the case of going up stairway & bus stair. Data were analyzed with use of SAS pakage. The statistics were based on average, standard diviation, two-way ANOVA, Pearson's correlation and multiple regression analysis. The main results were as follows. 1. There was significant difference in the moving fitness according to length & silhouette of tight skirt. The moving fitness of slim type was lower than that of straight type and the longer the skirt length was, the lower the moving fitness was. The significance appeared particularly in the case of going up the bus stair. 2. There was significant difference in the skirt length obove slit accorting to length & silhouette of tight skirt. The skirt length obove slit of slim type was shorter than that of straight type. The longer skirt length was, the longer it was from micro mini to natural line, that of medi skirt was shorter or a little longer than that of natural line skirt and there was little change from medi skirt to maxi skirt.

• Journal of Yeungnam Medical Science
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• 제35권2호
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• pp.232-235
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• 2018

Fabry disease (FD) is an X-linked, recessively inherited, rare, progressive, disorder of glycosphingolipid metabolism affecting multiple organs resulting in organ dysfunction. It is rare to find only one FD affected subject with a de novo mutation. Here we report a case of a 41-year-old Asian male diagnosed with de novo FD. Comprehensive ophthalmological evaluation was performed using slit lamp, color fundus photography, optical coherence tomography, fluorescein angiography, and indocyanine green angiography. On slit lamp examination, cornea verticillata and slightly tortuous, and aneurysmal dilatation of inferior bulbar conjunctival vessels were observed. Other imaging modalities showed unremarkable findings. Cornea verticillata and inferior bulbar conjunctival vascular abnormalities may be detected earlier than other ocular abnormalities in de novo FDs like hereditary FDs.

• 한국전자파학회논문지
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• 제24권12호
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• pp.1113-1119
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• 2013

본 논문에서는 다중 입출력(Multiple-Input Multiple-Output: MIMO) 무선 기계에 대한 안테나의 설계를 제안하였다. 제안된 안테나는 다양한 LTE(Long Term Evolution) 서비스 대역을 다룬다; 밴드(band) 17(704~746 MHz), 밴드 13(746~787 MHz), 밴드 5(824~894 MHz), and 밴드 8(880~960 MHz). 제안된 주(main) 안테나는 광대역 동작을 위해 역 L-형태의 슬릿(slit)을 가지고 있다. 그리고 LTE 부(sub) 안테나는 스위치(switch)를 결합한 루프(loop) 안테나 구조에 기초를 두었고, 논리 회로에 의해서 공진 주파수가 조절될 수 있다. LTE 수신 안테나에 대한 조절 기술은 원하는 대역의 실현을 위해, 그리고 임피던스(impedance) 조절을 위해 RF MEMS(Micro-Electro Mechanical System)를 사용하였다. 두 개의 제안된 안테나는 서로 수직으로 편파되기 때문에 원하는 주파수 대역에서 두 안테나는 -20 dB 이하의 격리도 특성을 가지며, 두 안테나 사이의 상관 계수(Envelope Correlation Coefficient: ECC) 특성은 0.06 이하의 매우 낮은 값을 가진다. 제안된 안테나는 통합된 LTE 다중 입출력 시스템의 단말기에 적용이 가능하다.