• The Journal of Engineering Geology
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• v.23 no.4
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• pp.447-455
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• 2013

A micro-mechanical pipe network model with the shape of a cube was developed to simulate the behavior of fluid flow through a porous medium. The fluid-flow mechanism through the cubic pipe network channels was defined mainly by introducing a well-known percolation theory (Stauffer and Aharony, 1994). A non-uniform flow generally appeared because all of the pipe diameters were allocated individually in a stochastic manner based on a given pore-size distribution curve and porosity. Fluid was supplied to one surface of the pipe network under a certain driving pressure head and allowed to percolate through the pipe networks. A percolation condition defined by capillary pressure with respect to each pipe diameter was applied first to all of the network pipes. That is, depending on pipe diameter, the fluid may or may not penetrate a specific pipe. Once pore pressures had reached equilibrium and steady-state flow had been attained throughout the network system, Darcy's law was used to compute the resultant permeability. This study investigated the sensitivity of network size to permeability calculations in order to find out the optimum network size which would be used for all the network modelling in this study. Mean pore size and pore size distribution curve obtained from field are used to define each of pipe sizes as being representative of actual oil sites. The calculated and measured permeabilities are in good agreement.

• Journal of Digital Convergence
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• v.16 no.2
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• pp.157-167
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• 2018

Internet only banking has been spreading rapidly since it was first introduced in Korea since 2017, but issues regarding its limitations continuously are rising. In this research, consumers' intention to switch have been empirically demonstrated toward the internet banking by applying the PPM theory. To achieve a purpose of the research, survey targeting total 132 person who have experiences of using KaKaobank have been implemented by using Smart PLS 3.0. In conclusion, it has been verified that the push and full effect have a positive effect on the consumers' intention to switch main bank and the degree of usage of KaKaobank have significantly influences on relation between mooring factor and consumers' intention to switch main bank. Through this study, the scope of the PPM theory applied in previous researches regarding consumer's service transition shall be extended to Fintech service and practically it provides implications for establishing a strategy to enter the Internet only bank market.

• Explosives and Blasting
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• v.21 no.3
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• pp.23-35
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• 2003

An analytical diffusion model for flood routing with backwater effects and lateral flows is developed. The basic diffusion equation is linearized about an average depth of (H + h), and is solved using the boundary conditons which take into account the effects of backwater and lateral flows. Scouring phenomenon around pier which affects on the support function of pier and the stabilization if river bed is a complex problem depending on flow properties and river bed state as well as pier geometry. therefore, there is no uniting theory at present which would enable the designer to estimate, with confidence, the depth of scour at bridge piers. The various methods used in erosion control are collectively called upstream engineering, HEC-RAS Model, underwater blasting. They consist of reforestation, check-dam construction, planting of burned-over areas, contour plowing and regulation of crop and grazing practices. Also included are measures for proper treatment of high embankments and cuts and stabilization of streambanks by planting or by revetment construction. One phase of reforestation that may be applied near a reservoir is planting of vegetation screens. Such screens, planted on the flats adjacent to the normal stream channel at the head of a reservoir, reduce the velocity of silt-laden storm inflows that inundate these areas. This stilling action causes extensive deposition to occur before the silt reaches the main cavity of the reservoir.

• Informatization Policy
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• v.18 no.3
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• pp.25-49
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• 2011

As a way to gather diverse information required for everyday living, the importance of social networks has been growing. Social network services have been spreading rapidly because of diffusion of the Internet, evolution of social network sites, and recognition of the importance of social networks. Recently, the social network service has been evolved based on a new paradigm, Web 2.0, pursuing participation and openness. Following the adoption of Web 2.0 technologies, the social network service allows users to make and maintain new relationships in a more convenient way. Users of the social network service tend to reveal their personal information, and share their ideas and content with other people; in the process they become aware of their existence, feel satisfaction with life and exert influence to others as a member of the society. This study uses higher order factor analysis to analyze factors that affect the intention of using the social network service. A research model was developed with second-order factors including perceived social presence, perceived gratification and perceived social influence. First-order factors are grouped by technical, individual and social factors. Smart PLS 2.0 was used to conduct empirical analysis. The analysis results supported the validity of the research model.

• 한국경영정보학회:학술대회논문집
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• 2008.06a
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• pp.680-688
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• 2008

본 연구는 최근 공공부문에 급속히 확산되고 성과 관리시스템을 수용하는데 있어 사용의도에 영향을 미치는 요인들을 실증분석으로 검증하기 위한 연구 이다. 정보시스템 형태로 구현된 BSC(Balanced Scorecard)기반의 성과관리시스템을 수용대상으로 하고 있어 Davis(1986)의 TAM (Technology Acceptance Model)을 기본 틀로 Venkatech et al.(2003)의 UTAUT(the Unified Theory of Acceptance and Use of Technology)를 접목하여 연구모형으로 활용하였다. 설문조사는 BSC시스템을 도입하여 사용 중인 공공부문 기관(회사)을 대상으로 251부의 유효표본을 확보하였다. 구조방정식 모형의 경로분석을 통한 가설검정 결과 13개의 가설 중 9개의 가설이 채택되었다. 교육훈련, 정보시스템 지원, 최고경영자지원, 개인의 혁신성은 노력에 대한 기대에 영향을 미치는 것으로 나타났다. 이는 사용 자들이 새로운 기술 수용에 있어서 보다 쉽게 사용 할 것으로 기대하는데 교육훈련, 정보시스템 지원, 최고경영자지원 등 조직차원의 다양한 지원과 사용자 개인의 혁신성이 요구되는 것으로 해석된다. 성과에 대한 기대의 경로분석 결과 BSC시스템 수용 요인들 중에서 최고경영자지원과 개인의 혁신성만이 영향을 미쳤다. 이러한 결과는 공공부문의 실제 BSC시스템 구축에 대한 사례연구들에서도 지적된 사항이기도 하다. 한편, 노력에 대한 기대는 성과에 대한 기대에 영향을 미치는 것으로 나타났다. 기존의 TAM 관련연구들의 결과를 지지하는 것으로 공공부문 BSC시스템 수용에 있어서도 노력에 대한 기대가 높을수록 성과에 대한 기대가 높은 것을 보여준다.

• Journal of Information Technology Services
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• v.11 no.2
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• pp.93-106
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• 2012

Recently, a Game Shut-down policy, partially limiting the time for the use of online game service, has been implemented in order to protect the youth from the excessive use of games by limiting their access to games in the late hours, based on the serious side effects of online games on the youth. However, the effectiveness of a Game Shut-down policy becomes a social issue. Thus, this study aims to investigate the alternative policies through the levels of the communications suggested by the theory of excellence, for the successful implementation of the policy. As a result of the study, the government and students, the recipient of those policies, need to strengthen their two-way communication in respect of the Game Shut-down policy, breaking from the existing views on the perception. The problem is that the current government's way of the communication for the Game Shut-down policy is one-way and it is aiming at achieving the objectives only. Thus, the communication in this manner will cause the side effect. 'the opportunistic violation of the system in the future', even if the students seemingly accept the system. Two-way communication will enhance the motivation for the voluntary acceptance of the system and lower the motivation for the opportunistic violation of the system. Thus, the government needs to strengthen two-way communication in the future.

• Journal of the Korean Vacuum Society
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• v.9 no.2
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• pp.172-178
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• 2000

We developed the model equations to investigate the particle movement and growth theoretically in a-Si plasma CVD reactor, where those particles act as the source of contamination. We included the effects of fluid convection, particle diffusion and external forces (ion drag force, electrostatic force and gravitational force) onto the particles to analyze the movements of particles in plasma reactor. Taking into account the particle charge distribution, the particle growth by coagulation between the charged particles was investigated. Most of those particles are located in the region near the sheath boundaries by the balance between the ion drag and electrostatic forces. The particle concentrations in the sheath region and in the bulk plasma region are almost zero. The sizes of the predator particles increase with time by the coagulation with protoparticles and, as a result, the surface area and the average charge of predator particles also increase with time.

• 한국벤처창업학회:학술대회논문집
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• 2016.04a
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• pp.133-136
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• 2016

본 논문은 스마트 사회에 요구되는 핵심역량으로서 디지털리터러시를 제안하고 선행연구에서 다루었던 학습지향성을 자원기반관점의 핵심역량으로 채택하여 기업성과와의 관계를 실증적으로 분석하였다. 이를 위해 중소기업창업지원법상의 기술기반 창업기업 200개 업체를 표본으로 하여 연구를 진행하였다. 주요 연구결과는 다음과 같다. 첫째, 학습지향성이 기업성과에 유의적인 정(+)의 영향을 미칠 것이라는 가설은 채택되었다. 둘째, 디지털리터러시가 기업성과에 유의적인 정(+)의 영향을 미칠 것이라는 가설은 채택되었다. 셋째, 디지털리터러시가 높을수록 기업성과에 대한 학습지향성의 영향력이 커질 것이라는 가설은 채택되었다. 본 논문의 이론적 실무적 시사점은 다음과 같다. 첫째, 스마트 사회의 등장으로 창업 및 기업성과에 대한 디지털리터러시의 영향이 중요해지고 있음에도 불구하고 디지털리터러시와 기업성과 간의 관계에 대한 실증 연구가 많이 부족하였다. 본 연구는 스마트 사회의 창업성공요인으로 디지털리터러시를 제안하여 학습지향성과 기업성과 간의 관계에 대한 디지털리터러시의 조절효과 및 디지털리터러시와 기업성과 간의 관계를 실증적으로 분석함으로써 디지털리터러시 관련 연구의 확산에 기여하고 있다. 둘째, 자원기반관점과 핵심역량이론에 따라 창업기업의 핵심역량으로서 학습지향성과 디지털리터러시를 채택하고 기업성과와의 관련성을 도출함으로써 두 가지 변수 모두 혁신형 창업을 활성화할 수 있는 스마트 사회의 핵심역량임을 확인하였다. 셋째, 연구방법론 측면에서 본 연구는 기업성과의 하위변수로 재무성과와 비재무성과 이외에 지적재산권의 출원이나 등록 등을 통해 측정되는 연구개발성과를 추가함으로써 기술기반 창업기업의 성장성 및 미래관점을 반영하고 있다.

• Applied Chemistry for Engineering
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• v.5 no.1
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• pp.149-159
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• 1994

The kinetics and equilibrium of metal extraction by benzamidoxime and phenylacetamidoxime-chloroform were investigated to apply amidoxime to metal extraction as chelating agent. The overall extraction constant extraction mechanism and selective extraction of copper were examined from the relation among extraction ratio, hydrogen ion concentration and extractant concentration. The experimental rate equation of copper extraction coincided with the theoretical rate equation and was expressed as $R_o=k{\overline{C}}_{HRo}(C_{Mo}/C_{Ho})^{1/2}$. The chemical species extracted was found to the type of ${\overline{CuR_2}}$.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.9 no.2
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• pp.508-514
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• 2008

Knowledge management has been spread rapidly since Knowledge is regarded as a crucial asset in future. Once, Knowledge had been obtained freely but hard to be shared. Studies on importance and share of knowledge have been taking place and it leads to development of knowledge management systems. However, decision makers still have problems even though they are using knowledge management systems. Eventually, for the decision makers are needed concentrated knowledge which is unconscious and embodied, when they make a decision. This is wisdom. Thus, wisdom is superior to knowledge for the decision makers. There are some researches on wisdom but wisdom management were overlooked. This study presents differences between knowledge and wisdom with theoretical research and empirical analysis on the wisdom management.