• 한국전산유체공학회:학술대회논문집
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• 한국전산유체공학회 2000년도 춘계 학술대회논문집
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• pp.45-50
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• 2000

We study a conceptual numerical model on shock-vortex interaction setting an impulsive shock in a compressible vertex. Navier-Stokes equations are solved for the investigation of interactive structure and acoustic wave propagation. The rotationally symmetric vortex enforces two compression-expansion pairs resultantly forming a quadrupolar shape. These compressive and expansive waves cylindrically propagate to the far field and turn to acoustic waves. Using a fine uniform Cartesian grid system and a TVD-high resolution method, the flow data irl: precisely obtained to extend our interest to the sound source.

• International Journal of Contents
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• 제17권3호
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• pp.48-66
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• 2021

We proposed a B2B food distribution platform by transforming an established food distribution and management platform based on blockchain technology. Our proposed model introduced a method to bring innovation into the domestic B2B food distribution market and systematically manage and utilize massive data (country of origin, producer, transaction, distributor, final consumer) generated within the food distribution process.

• 정보관리학회지
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• 제23권4호
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• pp.165-177
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• 2006

한국정보문화진흥원이 관리하는 국가 지식정보자원은 여러 기관에 분산되어 있으며, 메타데이터 규격은 통합이 아니라 검색을 위한 개념적 수준의 권고 표준이었다. 그래서 데이터를 연계하거나 통합하는데 많은 문제가 발생하고 있다. 본 논문에서는 여러 기관에 분산된 지식정보자원에 대한 통합을 위하여 기존에 여러 기관에 분산된 메타데이터를 분석하여 문제점을 도출하고 이를 보완하며, 지속적으로 연계 및 통합할 수 있는 표준 모델을 제시하고자 한다.

• Journal of Construction Engineering and Project Management
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• 제9권3호
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• pp.1-21
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• 2019

The management of mega construction projects which incorporate a large number of stakeholders, technologies, data, work culture etc., is cumbersome. The experts in the construction arena advocate that interface management serves as a precise tool in resolving these conflict points due to the intricate nature of the construction projects. Interface management is a current trending management practice in the construction industry which is also a beneficiary to mega/fast track projects in enhancing the project performance. The main objective of this study is to validate a model for assessing the relationships among interface management, IT applications, project performance & project benefits. The mediating effect of interface management in relationship between project performance & interfacial factors was also investigated. The research model was validated using PLS-SEM (Partial Least Square-Structural Equation Modelling) approach. Data were collected from clients, contractors, consultants in large scale projects through questionnaire survey and smart-PLS software was used to analyse the conceptual model. The research model comprises eleven hypothesis and the significance of these hypothesis were tested using T- statistics values. The research implies that people/participants factor is greatly influenced by interface management with the path coefficient of 0.608 and also enhancement of project's schedule performance due to the interface management is strongly appealing (Path coefficient = 0.711). The results also reveal IT application is significantly associated with interface management practice (Path coefficient =0.723) and also the effect of IT application on project performance (schedule, cost, quality & safety) is successfully mediated through interface management practice. The practical application of this validated model was done through case study. The case study aims at measuring the impact of interface management on interfacial factors and role of interface management in improving the project performance in the construction organisations.

• Journal of Information Technology Applications and Management
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• 제12권1호
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• pp.35-48
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• 2005

An architectural framework is developed for integrating geospatial and temporal data with relational information from which a spatio-temporal data warehouse (STDW) system is built. In order to implement the STDW, a generic conceptual model was designed that accommodated six dimensions: spatial (map object), temporal (time), agent (contractor), management (e.g. planting) and tree species (specific species) that addressed the 'where', 'when', 'who', 'what', 'why' and 'how' (5W1H) of the STDW information, respectively. A formal algebraic notation was developed based on a triplet schema that corresponded with spatial, temporal, and relational data type objects. Spatial object structures and spatial operators (spatial selection, spatial projection, and spatial join) were defined and incorporated along with other database operators having interfaces via the generic model.

• 대한교통학회지
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• 제24권3호
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• pp.157-165
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• 2006

본 연구는 총체적 관점에서 통신이 통행에 미치는 영향을 수요, 공급, 비용, 토지이용 등의 인과관계를 고려한 종합적인 체계속에서 분석하는 것이다. 이를 위해 통행, 통신, 토지이용, 경제활동, 사회인구지표를 고려한 개념적 모형을 개발하였다. 그리고 이 개념적 모형을 토대로 미국의 $1950{\sim}2000$년의 시계열 자료를 이용하여 통신(시내 전화통화 수, 장거리 전화통화 수, 이동전화가입자수)과 통행 (vehicle-miles traveled와 대중교통이용자수)간의 구조방정식 모형을 개발하였다. 연구결과 통신의 이용이 승용차 및 대중교통의 통행을 증가시키는 것으로 분석되었다. 이밖에 교통시설공급 확대와 토지이용(도시교외화)도 통행에 영향을 미치는 것으로 나타났다.

• 한국건설관리학회논문집
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• 제2권4호
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• pp.39-47
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• 2001

오늘날 각 산업에서 발생되는 정보의 양은 막대하다. 이러한 정보들은 정보기술의 발달로 인해 비용/시간적인 측면에서 효과적인 성과를 얻고 있다. 그러나, 국내 건설산업에서는 그러하지 못한 실정이다. 건설 프로세스 상에서 발생하는 수많은 정보들을 착용하는데 있어, 단지 일회성이라는 건설산업의 특수성으로 인해 다양한 정보들 또한 한번 활용될 뿐, 재활용되지 못하고 있는 실정이다. 건설공사 프로젝트 라이프 사이클 상에서 특히 발생하는 정보의 양과 중요도가 다른 단계에서 보다 높다는 전에서 현장에서 활용되는 시공정보들을 활용키 위한 방안에 관한 연구가 필요하다. 따라서 현장정보관리를 위한 분류체계를 중심으로 시공정보들을 활용하기 위한 모델을 제시하고자 한다.

• 유통과학연구
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• 제22권3호
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• pp.59-70
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• 2024

Purpose: This study aimed to develop a strategic business conceptual model for large state plantations in West Java Province and Banten Province, Indonesia. The model was built through causal relationships and interrelationships between marketing strategies and business strategies that affect business performance on large state plantations. The plantation sector provides the largest contribution to gross domestic product and is an important part of national food distribution efforts. Research design, data, and methodology: This study used a literature review adapted from Pret and Logan (2019), which followed the guidelines of Tranfield et al. (2003), derived from the Scopus website with Q1/Q2 quartiles and inclusion/exclusion criteria published from 2012 to 2021. Results: Based on a systematic literature review approach, we constructed the strategic business conceptual model for large state plantations based on a combination of four causal and interrelationship variables that affect business performance, namely, industry attractiveness, unique capabilities, innovation management, and collaboration strategy. Conclusions: This research explains the relationship between industry attractiveness variables and unique capability as independent variables that can affect business performance through collaboration strategy and innovation management as intervening variables in the plantation sector, especially large state plantations, which have not been found in previous studies.

• 지역사회간호학회지
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• 제33권3호
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• pp.321-331
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• 2022

Purpose: This study is to establish a structural model for standard precautions compliance of nursing students. This conceptual model was based on the IMB (Information-Motivation-Behavioral skills) model of Fisher and Fisher. Methods: Data were collected from October 12 to December 1, 2020, and the subjects were nursing students from G metropolitan city and J province, and the data of a total of 334 subjects were analyzed. For data analysis, this study used the SPSS 24.0 and AMOS 24.0 programs. Results: The hypothetical model showed a good fit to the data: 𝑥²=106.46 (p<.001), 𝑥²/df=2.54, RMSEA=.07, SRMR=.04, CFI=.96, TLI=.94. It was confirmed that the variables that have a statistically significant influence on the standard precautions compliance in nursing students were in the order of self-efficacy, social support, personal attitude, and standard precautions knowledge. The model explained 48.3% of the variance in standard precautions compliance of nursing students. Conclusion: It is necessary to develop and apply various specialized extracurricular programs that can induce an individual attitude toward observing standard precautions compliance in a positive direction in relationships with teachers and peers and gain their support.

• 물과 미래
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• 제28권3호
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• pp.123-132
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• 1995

본 연구는 대유역의 유량예측을 위한 수공학적 모형 시스템을 개발하는데 있다. 이 시스템은 각각의 부분유역에서의 기상학적, 수문학적 입력자료를 바탕으로 하천유량을 예측하는 개념적인 수문학적 강우유출모형과 각부분유역의 예측유량을 입력치로 하여 하도홍수추적을 하는 수리학적 모형으로 구성되어 있다. 실시간 해석시 새로운 관측자료로부터 모형의 상태변량을 최적화 할 수 있는 효율적인 상태변량 추정자가 사용되었다. 실시간 유량예측을 위해서 본 연구에서 개발된 모형을 적용하여 본 결과, 예측가능시간이 짧은 경우 대유역의 실시간 유량예측모형으로서 타당한 것으로 판단된다.