• Proceedings of the Korean Society of Broadcast Engineers Conference
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• 2012.11a
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• pp.220-223
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• 2012

본 논문에서는 스테레오 영상으로부터 무안경 3D 디스플레이를 위한 다시점 영상을 생성하는 시스템을 제안한다. 제안한 시스템에서는 먼저 비디오 캡쳐 카드를 통해 입력되는 스테레오 영상으로부터 FPGA 상에서 구현된 Trellis 동적 프로그래밍 기법에 의해 좌우 변이 영상을 실시간으로 추출한다. 이 변이 영상을 기반으로 좌우 영상 사이에서 중간 시점 영상을 생성한다. 이렇게 추출된 좌우 변이 영상과 좌우 스테레오 영상은 각각 USB 3.0 과 PCI-express 인터페이스를 통해 GPU 로 전송되고, GPU 에서는 이들 데이터를 사용하여 변이 기반 영상 합성 방법을 통해 다시점 영상을 생성한다. 생성된 다시점 영상은 다시점 3 차원 디스플레이 규격에 맞게 재배치되어 재생된다.

• Proceedings of the Korea Information Processing Society Conference
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• 2005.11a
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• pp.1503-1506
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• 2005

비디오 코딩 기술과 더불어 디지털 비디오 장치의 급속적인 발전으로 최근에 디지털 비디오 시스템에 대한 관심은 극도로 향상되어 있다. 특히, 비디오 압축 기술을 바탕으로 하고 있는 디지털 비디오 레코딩 시스템, DVR은 실제로 채널 확장에 따른 영상의 압축과 복원이 실시간으로 변화되지 않는 비(非) 대층형 압축 기술에 대한 문제점과 화면정지 시의 화질 문제, 초당 녹화 프레임 수를 높이기 위한 압축 기술의 향상과 이에 따른 화질 저하 문제를 모두 해결할 수 있는 기술이 절실히 요구되어지고 있는 가운데, 본 논문에서는 비디오 채널의 확장에 따른 기술적인 부담을 안고 실시간으로 디지털로 기록하는 동안에 캡쳐된 비디오 프레임들의 다채널의 실시간 비디오 데이터 처리에 대한 효과적인 메모리 대역폭 제어와 PCI 대역폭을 제어하는 방법을 통해 시스템 내부의 계산상의 비용을 감소시키고 시스템의 성능을 향상 시킬 수 있는 방법을 제시하고자 한다.

• Proceedings of the Korean Society for Quality Management Conference
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• 2004.04a
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• pp.70-75
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• 2004

In actual manufacturing industries, process capability indices(PCI) are used to determine whether a production process is capable of producing items within a specified specification limits. We study some vector-valued PCIs $C_p=(C_{px},\;C_{py})$ and $C_{pk}=(C_{pkx},\; C_{pky})$ in this article. We propose some asymptotic confidence regions of PCIs with bootstrapping and examine the performance of those asymptotic confidence regions under the assumption of bivariate normal distribution.

• International Journal of Highway Engineering
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• v.8 no.2 s.28
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• pp.49-54
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• 2006

The purpose of this study was to determine the effect of expansion joint spacing (slab size) on the life cycle costs of owning Portland Cement Concrete (PCC) airfield pavements. Previous research has shown that slab size has a statistically significant impact on pavement performance. A probabilistic life cycle cost analysis was performed to determine if the effect of slab size on pavement performance would affect the total cost of ownership of PCC pavements. Data from 48 Pavement Condition Index (PCI) inspections of military and civilian airfields were used to develop probability-of-distress-by-condition curves, which were then used to develop probabilistic cost-of-repair-by-condition curves. A present worth life cycle cost analysis was then performed for various slab sizes, using construction costs, rehabilitation costs, and maintenance costs. Maintenance costs were determined by assuming a condition deterioration rate appropriate for each slab size and applying the cost-by-condition curves. The probabilistic cost-of-repair-by-condition curves indicated that smaller slabs are more expensive to repair on a unit cost basis. Life cycle cost analysis showed that larger slabs have a higher total cost of ownership than smaller slabs due to a faster rate of deterioration.

• Parasites, Hosts and Diseases
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• v.37 no.2
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• pp.121-125
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• 1999

Inoculation of human fecal cysts to suckling Mongolian gerbils, two Giardia lamblia isolates, Kl and K2, were established as axenic cultures. Using this in vitro culture, both two Giardia isolates were grouped by using two genetic analysis. With genetic analysis of SSS-rDNA sequences, both K1 and K2 were found as members of hopkins'group 1, despite some nucleotide differences noticed in K1 (5 differences/292 bases.). The other genetic study used PCI-RFLP of the tim (triose phosphate isomerase) Nash's group 2 can bot be a separate group, but a part of Hopkins' group 1.

• Proceedings of the Korean Society of Precision Engineering Conference
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• 2006.05a
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• pp.153-154
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• 2006

Development of sorting machine for photo diode and its control system is addressed. The sorting machine for optical communication device requires high positional precision because the alignment is one of the most important point in the sorting process. This sorting method describes how to detect the target chip's angle and position from the wafer. The machine vision system is used for the feedback control. This sorting machine is implemented by motion controller, machine vision and various solenoid valve and is interfaced with RS-232c, GPIB and PCI communication. This system gets the position accuracy within $1{\mu}m$ with our experiments.

• Proceedings of the Korean Information Science Society Conference
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• 2004.04a
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• pp.835-837
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• 2004

본 논문에서는 최근에 급속도로 증가하고 있는 네트워크 트래픽으로 인한 종단서버 시스템의 네트워크 정합부분에서 발생하는 병목현상을 해소하기 위한 방안으로 네트워크 프로세서 기반의 프로토콜 오프로드 엔진을 제안한다. 지금까지 프로토콜 재 설계. 제로복사 등의 소프트웨어적인 방법으로 시도되던 종단서버 시스템의 네트워크 입출력 처리를 네트워크 프로세서를 이용한 프로토콜 오프로드엔진을 사용하여 처리함으로써 네트워크 입, 출력 처리부의 성능을 향상시키고자 한다. 오프로드엔진은 프로그램에 의해 쉽게 재사용, 수정이 용이한 구조로 설계하였다. 본 논문에서는 인텔의 IXP1200를 탑재한 PCI 네트워크 정합장지 개발 보드를 사용하여 프로토콜 오프로드 엔진을 구현하고 그 성능을 측정하였다.

• Proceedings of the Korea Concrete Institute Conference
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• 2005.05a
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• pp.71-74
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• 2005

The increasement in the floor hight may be one of the most significant problem in the use of precast concrete double slab in the multi-story buildings. The modified double-tees including duct space at the ends of slab were considered in this study. The length and thickness of nib of modified double tee was increased to receive the uniform reaction from rectangular beam, while the original PCI dapped one to receive the point load from inverted tee beam to the leg of double tee. Shear tests were performed on the ends of the modified double tees which were designed by strut-tie model. The modified double tees generally show more ductile flexural failure in the long thickened nib. It is concluded that they show superior failure patterns than that of original dapped one with shear failure.

• Journal of Korean Society of Industrial and Systems Engineering
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• v.38 no.1
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• pp.182-187
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• 2015

Process capability indices (PCIs) have been widely used in manufacturing industries to provide a quantitative measure of process potential and performance to meet the specification limits on quality characteristics. The most of existing PCIs are concerned with a single variable. But, in many cases, people want to express a integrated PCI which includes a couple of sequential processes. In this paper, we analyzed the characteristics of system PCIs such as ${\bar{Cp}}(f)$, $SC_{pk}$, $SC_{psk}$, $C^T_{psk}(m)$ and $SC_{pm}(m)$.

• Proceedings of the KSR Conference
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• 2006.11b
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• pp.1483-1487
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• 2006

In electric railway, image monitoring using high speed camera provides reliable, timely information of wear and geometry status, important in taking decisions for overhead contact wire maintenance. The contribution of this research is the development of a simple real-time monitoring system for use in measurement subsystem of contact wire and geometry of overhead contact wire in electric railway. The system has been consists of a high speed CMOS camera with resolution $1024{\times}1280$ pixels, line type laser source and PC-based image acquisition system with PCI Express slot. Vision acquisition software have been used in application programming interface for image acquisition, display, and storage with a frequency of sampling of 500 acquisitions per second.