• 정보처리학회논문지B
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• 제19B권4호
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• pp.243-248
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• 2012

정보검색 분야에서 벡터 모델, 문서 클러스터링 등은 입력 문서 개수가 증가할수록 유사도 계산 속도가 시스템의 성능에 많은 영향을 미치고 있다. 본 논문에서는 문서 유사도 계산 성능을 향상시키기 위하여 유사도를 계산하는 연산을 CPU 대신에 GPU를 이용하는 CUDA 프레임워크에서 병렬처리 기법으로 구현하는 방법을 제안하였다. 이 방법은 보편적인 방식인 CPU 환경에서 구현했을 때와 비교할 때 최대 15배까지 성능이 향상되었다. 또한, 기존의 CUDA 라이브러리인 CUBLAS와 Thrust를 사용한 방법보다도 각각 5.2배, 3.4배의 성능 개선 효과가 있음을 확인하였다.

• 한국전자거래학회지
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• 제8권3호
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• pp.197-217
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• 2003

ebXML은 e비즈니스를 위한 글로벌 표준으로서 그 동안 기업간 협력의 가장 큰 장애물로 여겨졌던 정보 시스템의 이질성을 극복할 수 있는 대안을 제시하는 기술이다. ebXML에서는 전체적 인 프레임워크를 구성하는 주요 요소로서 거래 절차를 기술하는 비즈니스 프로세스, 거래에 이용되는 공통의 용어와 그 의미를 정의하고 있는 핵심 컴포넌트, 거래에 필요한 정보를 저장하고 검색하는 레지스트리, 거래 문서의 전송을 위한 메시징 서비스 등을 정의하고 있다. 이러한 구조를 기반으로 ebXML에서의 거래 절차는 비즈니스 프로세스에서 요구하고 있는 다양한 비즈니스 문서의 교환에 의해서 수행되며, 이때 필요한 비즈니스문서의 모델은 핵심 컴포넌트를 기반으로 저작된다. 본 논문에서는 우선 ebXML의 기술 구조 및 관련기술 동향에 대하여 살펴보고, ebXML 핵심 컴포넌트 및 이를 기반으로 비즈니스 프로세스의 수행에 필요한 비즈니스 문서를 생성하는 기술에 대하여 분석한다.

• 한국경영과학회지
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• 제38권1호
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• pp.69-87
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• 2013

Recently a large number of people have been using social networking and microblogging services such as Facebook and Twitter. These mediums play a pivotal communication channel in a business-to-customer (B2C) relationship. Given its importance in today's business, companies have invested in the strategic application of social network services to reach out to customers. This study provides a blueprint for mechanisms for successful execution of social network services in the context of developing an effective B2C relationship, such as customer participation behavior. The S-O-R(Stimulus-Organism-Response) framework lays out the foundation for developing our research model and provides a structured view for understanding customer participation behavior on brand loyalty. For the methodology, this study employed a mixed-method approach. Additionally, in order to provide empirical evidences, a total of 121 respondents have completed the survey. All the data were compiled and analyzed through structural equation modeling and were implemented in partial least square (PLS). To sum up, this study presented theoretical and practical implications by providing the effect of customer participation behavior on brand loyalty through B2C microblogging.

• 대한기계학회논문집B
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• 제21권8호
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• pp.1024-1033
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• 1997

The past several years have witnessed an ever-increasing acceptance and adoption of parallel processing, both for high performance scientific computing as well as for more general purpose applications. Furthermore with increasing needs to perform the complex flow calculations in an efficient manner, the use of the message passing model on distributed networks has emerged as an important alternative to the expensive supercomputers. This work attempts to provide a generic framework to enable the parallelization of all CFD-related works using the master-slave model. This framework consists of (1) input geometry, (2) domain decomposition, (3) grid generation, (4) flow computations, (5) flow visualization, and (6) output display as the sequential components, but performs computations for (2) to (5) in parallel on the workstation clustering. The flow computations are parallized by having multiple copies of the flow-code to solve a PDE on different spatial regions on different processors, while their flow data are exchanged across the region boundaries, and the solution is time-stepped. The Parallel Virtual Machine (PVM) is used for distributed communication in this work.

• 한국자기공명학회논문지
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• 제11권2호
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• pp.95-109
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• 2007

Vanadium-incorporated aluminophosphate microporous molecular sieve VH-SAPO-42 has been studied by electron spin resonance(ESR) and electron spin-echo modulation (ESEM) spectroscopies to determine the vanadium location and interaction with various adsorbate molecules. The results are interpreted in terms of V(IV) ion location and coordination geometry. Assynthesized VH-SAPO-42 contains only vanadyl species with distorted octahedral or trigonal bipyramidal coordination. Vanadium incorporated into H-SAPO-42 occupied extra-framework site. After calcinations in $O_2$ and exposure to moisture, only species A is observed with reduced intensities. Species A is identified as a $VO(H_2O)_2^{2+}$ complex coordinated to three framework oxygen atoms bonded to aluminum. When hydrated VH-SAPO-42 is dehydrated at elevated temperature by calcination, species A loses its water ligand and transforms to $VO^{2+}$ ions coordinated to three framework oxygens (species B). Species B reduces its intensities significantly after treatment with $O_2$ at high temperature, thus suggesting oxidation of $V^{4+}$ to $V^{5+}$. When dehydrated VH-SAPO-42 makes contact with $D_2O$ at room temperature, the ESR signal of species A is regained. The species is assumed as a $VO(O_f)_3(D_2O)_2$ by considering three framework oxygens. Adsorption of deuterated methanol on dehydrated VH-SAPO-42 results in another new vanadium species D, which is identified as a $VO(CD_3OH)_2$ complex. When deuterated ethylene is adsorbed on dehydrated VH-SAPO-42, another new vanadium species E identified as a $VO(C_2D_4)^{2+}$, is observed. Possible coordination geometries of these various complexes are discussed.

• 한국정보과학회논문지:컴퓨팅의 실제 및 레터
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• 제12권5호
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• pp.312-325
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• 2006

EAI나 B2BI와 같은 통합 어플리케이션들은 짧은 시간 동안의 서비스 요청 폭주로 인한 과부하시에도 대용량의 I/O기반 트랜잭션들을 안정적으로 처리할 수 있는 신뢰성 있는 시스템을 필요로 한다. 본 논문에서는 I/O기반 시스템에서 대용량의 거래를 효과적으로 처리할 수 있으며 짧은 시간 동안의 거래 요청 폭주로 인한 과부하시에도 안정적으로 서비스를 제공할 수 있는 Peak Load Control(PLC)기반의 Worker-Linker 패턴을 제시한다. 본 논문에서는 PLC 기법을 위해 지체시간(Delay Time) 알고리즘을 사용한다. 또한 제안한 알고리즘이 가지는 과부하 시의 성능 안정성을 증명하기 위해 본 논문에서는 Worker-Linker 패턴을 실제 B2BI 시스템에 적용해서 성능 안정성을 증명하기 위한 실험 결과를 제시한다. 실험 결과에 의하면 본 논문에서 제안한 지체시간 알고리즘은 과부하 상태를 안정적으로 통제하는데 효과가 있다.

• 한국정보과학회:학술대회논문집
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• 한국정보과학회 2002년도 봄 학술발표논문집 Vol.29 No.1 (A)
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• pp.370-372
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• 2002

Microsoft사의 BizTalk Server는 전통적 EDI, XML/EDI 및 향후 보편화 될 ebXML 등 거의 모든 전자 상거래 표준을 지원하며, 또한 기업의 내부 시스템과 B2B 전자상거래와의 통합할 수 있는 EAI(Enterprise Application Integration) 시스템이다. 본 논문에서는 XML/EDI 시스템 및 BizTalk Framework에 대해 조사하고, 현재 건설회사에서 사용중인 시스템들의 문제점을 파악하여 이러한 문제점을 해결하기 위해 Microsoft사의 BizTalk Server를 이용한 XML/EDI 시스템을 설계하고 구현한 방법을 소개한다.

• Bulletin of the Korean Chemical Society
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• 제34권10호
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• pp.2900-2904
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• 2013

We present the synthesis and characterization of DTPA-bis(histidylamide) (1a), DTPA-bis(aspartamide) (1b), and their gadolinium complexes of the type $[Gd(L)(H_2O)]$ (2a:L = 1a; 2b:L = 1b). Thermodynamic stabilities and $R_1$ relaxivities of 2a-b compare well with Omniscan$^{(R)}$, a well-known commercial, extracellular (ECF) MRI CA which adopts the DTPA-bis(amide) framework for the chelate: $R_1$ = 5.5 and 5.1 $mM^{-1}$ for 2a and 2b, respectively. Addition of the Cu(II) ion to a solution containing 2b triggers relaxivity enhancement to raise $R_1$ as high as 15.3 $mM^{-1}$, which corresponds to a 300% enhancement. Such an increase levels off at the concentration beyond two equiv. of Cu(II), suggesting the formation of a trimetallic ($Gd/Cu_2$) complex in situ. Such a relaxivity increase is almost negligible with Zn(II) and other endogenous ions such as Na(I), K(I), Mg(II), and Ca(II). In vivo MR images and the signal-to-noise ratio (SNR) obtained with an aqueous mixture of 2b and Cu(II) ion in an 1:2 ratio demonstrate the potentiality of 2 as a copper responsive MRI CA.

• 산업공학
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• 제13권3호
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• pp.416-423
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• 2000

This paper considers a web-based order processing system under SCM environment. Following the framework of B2B electronic commerce, we focus on activities closely related to order handling within the supply chain. We also try to integrate the order processing system with the overall information system of the company. The methodology is applied to the case of H company and a prototype system is designed. This study analyzes the current product estimate and order handling process in the point of view of both the purchasing and the selling companies. It intends improvement by changing the existing closed way of request and offering estimate through fax or VAN into an open way using internet. For this, a company should be registered on the order site of internet. Then it can request estimate, take estimate, and handle order through internet adopting the concept of electrical commercial transaction.

• Nonlinear Functional Analysis and Applications
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• 제26권2호
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• pp.303-322
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• 2021

The concepts of new classes of mappings are introduced in the spaces which are more general space than the usual metric spaces. The existence and uniqueness of common fixed points and fixed point results are established in the setting of complete complex valued b-metric spaces. An illustration is given by establishing the existence of solution of periodic differential equations in the framework of a complete complex valued b-metric spaces.