• 한국정밀공학회지
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• 제30권9호
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• pp.901-908
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• 2013

The introduction of industrial intelligent robot using vision sensor has been interested in automated factory. 2D and 3D vision sensors have used to recognize object and to estimate object pose, which is for packaging parts onto a complete whole. But it is not trivial task due to illumination and various types of objects. Object image has distorted due to illumination that has caused low reliability in recognition. In this paper, recognition method of complex shape object has been proposed. An accurate object region has detected from combined binary image, which has achieved using DoG filter and local adaptive binarization. The object has recognized using neural network, which is trained with sub-divided object class according to object type and rotation angle. Predefined shape model of object and maximal slope have used to estimate the pose of object. The performance has evaluated on ETRI database and recognition rate of 96% has obtained.

• 대한전자공학회논문지SD
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• 제47권7호
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• pp.37-43
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• 2010

영상데이터의 용량이 늘어남에 따라, 시리얼 링크의 전송속도는 점점 빨라지고 있다. 따라서 기존에 제시되었던 상용화규격도 계속해서 전송속도를 상향시킨 차기 버전을 제안하고 있다. 차기 버전은 기존 버전과 호환성을 갖춰야 하므로 두 가지 이상의 전송속도로 동작할 수 있는 송수신기 회로가 필요하다. 본 논문에서는 4개의 채널을 가지며, 3.2 Gb/s 또는 6.4 Gb/s의 전송속도로 동작하는 송신기를 설계하였다. 이 송신기는 1, 1.5, 2, 3배의 pre-emphasis를 선택적으로 사용할 수 있으며, 출력 스윙을 200, 300, 400, 600 mVdiff,p2p로 선택할 수 있다. 설계된 송신기는 $0.13{\mu}m$ CMOS 공정을 이용하여 제작되었으며, COB 패키징을 이용하여 PCB에 실장되어 검증되었다.

• 한국광학회지
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• 제23권5호
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• pp.217-221
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• 2012

본 논문에서는 정밀 세라믹 부품을 이용한 MBS(Micro-Block Stacking) 방법으로 1550 nm 파장의 아날로그 신호 수신과 1310nm/1490nm 파장의 디지털 신호 송, 수신이 가능한 8 pin mini DIL 형태의 집적형 Triplexer를 제작하였다. 제작된 전체 어셈블리는 $5.40mm{\times}2.15mm{\times}1.05mm$ 크기로 통신용 광모듈 국제 표준인 MSA(Multi Source Agreement) 규격의 SFP(Small Form Pluggable) 광모듈 제작이 가능하다. 자동 능동 광정렬 장비를 사용하여 제작된 집적형 Triplexer를 단일모드 광섬유에 광정렬하였을 때, 1310 nm 송신부 최대 광출력이 -14.5 dBm이었고, 송신부에 의하여 위치가 자동 정렬된 1550 nm와 1490 nm 수신부 수신감도는 각각 0.83 A/W, 0.73 A/W로 단거리 통신에 적용 가능한 값을 얻었다.

• 대한기계학회논문집A
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• 제39권6호
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• pp.561-566
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• 2015

본 논문에서는 고 중량물을 빠르게 이송시키며'Pick & Place'작업을 수행하는 병렬로봇의 작동강성 최적설계에 대한 연구를 수행하였다. 20~30kg 의 고 중량물을 사용하여 특정 작업을 빠르게 수행하기 위해서는 빠른 응답속도를 위한 관성 기구부 경량 설계와 동시에 동작의 정밀도를 위한 고 강성설계가 필요하다. 하지만 요구조건인 관성 기구부 경량 설계와 고강성 설계는 상호 배타적인 관계이므로 본 연구에서는 다물체동역학 해석을 통해서 병렬로봇의 동적 거동을 분석함으로써 로봇의 작동 중에 작용하는 하중상태를 분석하였고, 상호 배타적인 두 성능을 동시에 만족시키기 위해 관성 기구부 위상 최적 설계를 수행하였다. 그리고 위상 최적설계 결과를 병렬로봇에 적용하여 그 신뢰성을 검증하였다.

• 정보처리학회논문지C
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• 제11C권3호
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• pp.327-336
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• 2004

DRM 기술은 사용 권한이 없는 사용자가 사용자 기기를 이용해 불법으로 디지털 컨텐츠를 사용하는 것을 방지하는 것을 목적으로 한다. 따라서 DRM 시스템을 구성하기 위해서는 기본적인 정보보호 기술들이 이용된다. 이는 무선 DRM의 경우에 있어서도 마찬가지다. 특히 디지털 컨텐츠를 암호화 기술을 이용하여 패키징하고 패키징된 디지털 컨텐츠를 사용하기 위해 필요한 패키징에 사용된 암호화 키를 PDA나 휴대전화기 같은 합법적인 무선 사용자 기기에 안전한 방법으로 배분하는 것이 중요하다. 본 논문은 무선 DRM 표준안인 OMA의 규격을 준수한 무선 디지털 컨텐츠 배분에 사용될 무선 DRM 시스템의 구조를 제안하고 공개키 기법을 사용하여 디지털 컨텐츠 사용권을 배분하는 방식으로 무선 DRM 시스템 각 구성 요소들 사이의 프로토콜을 제안하고 설계 구현하였다.

• 재무관리연구
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• 제26권4호
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• pp.83-102
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• 2009

Banks traditionally focus on the financial services against the uncertain future liquidity needs, i.e. saving as well as lending. As the business model of banks has been shifted from the originate to hold model to the originate to distribute model since the enactment of Gramm-Leach-Bliley Financial Services Modernization Act in 1999, the financial services encompass information gathering and generating, underwriting and risk sharing through packaging claims for the investors, in addition to the payment and settlement services. Ensued are the financial market integration and diversification of financial services, with which the accessibility to financial services is arguably significantly enhanced. Such integration and diversification necessarily entails the risk of contagion due to the non-fulfilling service over the several other financial services, which would be contained easily under the separate financial services. This paper addresses the pricing of fees for the integrated financial services through which the contagion could spread when the users of financial service are not immune to the failure to fulfill their obligation due to the economic turmoil. Consequently the information asymmetry about the clients is unavoidable. Higher fees could drive out the otherwise good clients out of the pool of customers for the financial services. Then, the risk could be exacerbated due to the proliferation of bad clients who are vulnerable to the financial distress and liquidity crunch. So the banks should take into account the interactional effect of the fees between/among the non interest based activities and interest based activities under the information asymmetry. Contrary to our general perception, the current analysis demonstrates that the bank should focus on the reduction of cost associated with good clients rather than that of bad clients.

• 무역상무연구
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• 제66권
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• pp.25-46
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• 2015

The purpose of this paper is to provide a legal implication about conformity of goods in the international commercial transactions. There are so many legal relationship after the formation of contract. The most of important thing among the obligations of seller is to provide conformal goods which are of quantity, quality and description required by the contract and which are contained or packaged in the manner required by the contract. If seller violate above duties, seller take the warranty liability. However, CISG describe the conformity of the goods instead of the warranty as follows. First, CISG Art.35(1) states standards for determining whether goods delivered by the seller conform to the contract and Art.35(2) describes standards relating to the goods' quality, function and packaging that, while not mandatory, are presumed to be a part of sales contracts. Article 35(2) is comprised of four subparts. Two of the subparts (article 35(2) (a) and article 35(2)(d)) apply to all contracts unless the parties have agreed otherwise. Second, CISG Art.36 and 38 deals with the time at which a lack of conformity in the goods must have arisen in order for the seller to be liable for it. If seller lack of conformity becomes apparent only after that time, seller is liable for a lack of conformity existing when risk passed to the buyer. Third, CISG Art.49 describe that a buyer who claims that delivered goods do not conform to the contract has an obligation to give the seller notice of the lack of conformity. The most of important things about CISG articles and precedents is that buyer is aware of the lack of conformity and notice it to seller. Failure to satisfy the notice requirements of article 39 eliminates a buyer's defence, based on a lack of conformity in delivered goods, to a seller's claim for payment of the price. Consequently, parties of contract had better agree to the notifying times about lack of conformity. Also, If seller fined the non-conformity, seller has to notify this circumstance to the buyer within short period or agreed time.

• 방사성폐기물학회지
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• 제14권2호
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• pp.123-134
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• 2016

최근 국내에서는 월성 1호기 및 고리 1호기를 포함하여 운영 중인 원자력발전소가 노후화함에 따라 원전 해체에 대한 관심이 많이 증대되고 있다. 이와 관련하여 월성 1호기의 계속운전이 최근 결정되었으며, 고리 1호기의 경우 2017년 6월 영구정지하기로 결정되었다. 이에 본 논문에서는 상업용 원자로로서는 국내 최초로 해체가 예정된 고리 1호기에 대해, 원자로 압력용기 자체의 해체로 인해 발생하는 방사성폐기물 최종 처분량을 원자로 압력용기 절단 방법 및 방사성폐기물 처분용기를 고려하여 산정하였다. 처분용기를 고려한 방사성폐기물 처분량을 산정한 결과 원자로 압력용기 몸통 부위보다는 반구 형태의 헤드 부분을 작게 절단할수록 최종 처분량이 감소하는 것으로 예측되었다. 또한 경주 방폐장의 200 L 및 320 L 드럼 처분용 처분용기의 경우 무게 제한으로 인해 적재효율이 좋지 못한 것으로 나타났다.

• 대한안전경영과학회지
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• 제6권3호
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• pp.211-235
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• 2004

Component based design is perceived as a key technology for developing advanced real-time systems in a both cost- and time effective manner. Already today, component based design is seen to increase software productivity, by reducing the amount of effort needed to update and maintain systems, by packaging solutions for re-use, and easing distribution. Nowdays, a thousand and one companies in If(Information Technology) industry such as Sl(System Integration) and software development companies, regardless of scale of their projects, has spent their time and endeavor on developing reusable business logic. The component software is the outcome of software developers effort on overcoming this problem; the component software is the way propositioned for quick and easy implementation of software. In addition, there has been lots of investment on researching and developing the software development methodology and leading If companies has released new standard technologies to help with component development. For instance, COM(Component Object Model) and DCOM(Distribute COM) technology of Microsoft and EJB(Enterprise Java Beans) technology of Sun Microsystems has turned up. Component-Based Development (CBD) has not redeemed its promises of reuse and flexibility. Reuse is inhibited due to problems such as component retrieval, architectural mismatch, and application specificness. Component-based systems are flexible in the sense that components can be replaced and fine-tuned, but only under the assumption that the software architecture remains stable during the system's lifetime. In this paper, It suggest that systems composed of components should be generated from functional and nonfunctional requirements rather than being composed out of existing or newly developed components. about implements and accomplishes the modeling for the Product Control component development by applying CCD(Contract-Collaboration Diagram), one of component development methodology, to MRP(Material Requirement Planning) System

• Current Optics and Photonics
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• 제1권4호
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• pp.389-395
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• 2017

This paper investigates a method to improve the lighting performance of white light-emitting diodes (WLEDs), which are packaged using two separate remote phosphor layers, a yellow-emitting YAG:Ce phosphor layer and a red-emitting ${\alpha}-SrO{\cdot}3B_2O_3:Sm^{2+}$ phosphor layer. The thicknesses of these two layers are $800{\mu}m$ and $200{\mu}m$, respectively. Both of them are examined in conditions where the average correlated color temperatures (CCT) are 7700 K and 8500 K. For this two-layer model, the concentration of red phosphor is varied from 2% to 30% in the upper layer, while in the lower layer the yellow phosphor concentration is kept at 15%. It was found interestingly that the lighting properties such as color rendering index (CRI) and luminous flux are enhanced significantly, while the color uniformity is maintained in a relatively close range to the one of one-layer configuration (measured at the same correlated color temperature). Besides, the transmitted and reflected light of each phosphor layer are revised by combining Kubelka-Munk and Mie-Lorenz theories. Through analysis, it is demonstrated that the packaging configuration of two-layer remote phosphor that employs red-emitting ${\alpha}-SrO{\cdot}3B_2O_3:Sm^{2+}$ phosphor particles provides a practical solution for general WLEDs lighting.