• Smart Structures and Systems
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• 제25권1호
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• pp.111-122
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• 2020

Researchers up to date have introduced several Structural Health Monitoring (SHM) techniques with varying advantages and drawbacks for each. Satellite positioning systems (GPS, GLONASS and GALILEO) based techniques proved to be promising, especially for high natural period structures. Particularly, the GPS has proved sufficient performance and reasonable accuracy in tracking real time dynamic displacements of flexible structures independent of atmospheric conditions, temperature variations and visibility of the monitored object. Tall structures are particularly sensitive to oscillations produced by different sources of dynamic actions; such as typhoons. Wind forces induce in the structure both longitudinal and perpendicular displacements with respect to the wind direction, resulting in torsional effects, which are usually more complex to be detected. To efficiently track the horizontal rotations of the in-plane sections of such flexible structures, two main issues have to be considered: a suitable sensor topology (i.e., location, installation, and combination of sensors), and the methodology used to process the data recorded by sensors. This paper reports the contributions of the measurements recorded from dual frequency GPS receivers and uni-axial accelerometers in a full-scale experimental campaign. The Canton tower in Guangzhou-China is the case study of this research, which is instrumented with a long-term structural health monitoring system deploying both accelerometers and GPS receivers. The elaboration of combining the obtained rather long records provided by these two types of sensors in detecting the torsional behavior of the tower under ambient vibration condition and during strong wind events is discussed in this paper. Results confirmed the reliability of GPS receivers in obtaining the dynamic characteristics of the system, and its ability to capture the torsional response of the tower when used alone or when they are combined with accelerometers integrated data.

• 컴퓨터교육학회논문지
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• 제18권2호
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• pp.47-57
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• 2015

본 연구는 플립러닝 학습 프로그램을 초등학교 5학년 학생에게 사회과 수업에서 적용했을 때 학습동기 및 학업성취도에 미치는 효과를 알아보기 위하여 실험집단 24명, 통제집단 25명을 대상으로 실험을 하였다. 연구도구는 플립러닝 학습 프로그램, 학습동기 검사지, 학업성취도 검사지를 사용하였다. 연구절차는 사전검사, 실험처치, 사후검사 순으로 이루어졌으며 자료처리는 독립표본 t-검증과 대응표본 t-검증을 사용하였다. 연구결과 플립러닝 학습이 사회과 학습동기에 긍정적인 영향을 주는데 학습동기 요소 중 특히 주의집중, 자신감 향상에 영향을 주었다. 또한 플립러닝 학습은 학업성취도 향상에 긍정적인 효과를 미치는 것으로 나타났는데 학업성취도 상위수준 학생보다는 하위수준 학생에게 영향을 주는 것으로 나타났다.

• 한국융합학회논문지
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• 제9권3호
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• pp.153-163
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• 2018

본 연구의 목적은 국내에서 이루어진 자폐스펙트럼장애아동을 대상으로 한 로봇 활용 융합연구동향을 살펴보는 것이다. 이를 위하여 최근에 장애 아동의 교육적, 치료적 중재에 연구되고 있는 로봇연구 동향을 살펴보고자 하였다. 연구방법으로, 자폐를 키워드로 2009년 이후에 발표된 논문을 검색하여 총 17편의 연구 논문을 최종 선정하였고, 활용로봇, 독립변인, 종속변인 유형, 연구방법을 바탕으로 하여 주제별 범주로 묶어 내용 분석하였다. 연구결과, 그 중 자폐아동을 위한 로봇개발은 발전이 빠른 분야 중 하나이며, 자폐스펙트럼장애아동의 중재에 유용한 것으로 나타났다. 연구를 통해 향후 로봇활용의 일반화를 촉진할 수 있는 적용 절차 및 단계 등에 대한 세분화된 접근이 필요함을 알 수 있었다.

• 한국융합학회논문지
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• 제9권3호
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• pp.61-71
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• 2018

ICT의 파급으로 다양한 응용은 기술 수용자뿐만 아니라 기술 공급자에게도 새로운 기회가 되며 그들 간에는 경쟁적 관점에서의 기술혁신 노력이 필수적으로 요구될 수밖에 없다. 범용기술의 혁신적 보완의 특징으로 인해 급격한 기술 변화는 분명 높아지는 지식 장벽을 형성하여 높은 기회와 전유성을 보장하게 되지만 이러한 ICT의 슘페터적 패턴 속에서 과연 ICT 공급자는 어떤 노력을 기울여야 하는가에 대한 질문을 가지고 연구를 진행한다. 혁신의 확산에서 말하는 혁신의 존재에 대한 지식을 수용자가 갖게 하기 위해서 혁신 기술 시도와 기술 공급자의 흡수 역량이 필요하다는 가설 검증을 위해 5,700여개의 북미 상장사를 대상으로 ICT 기업이 출원하는 기술 특허의 확산을 실증적으로 관찰한다. 기술의 출현으로 생겨나는 기술 적소(Technological niche)의 개념을 도입하고 이후 이 기술 적소에 참여하는 후발 비 ICT 기업의 참여 사건의 발생 위험률을 독립변수로 하는 생존분석을 통해 혁신적인 기술 시도와 흡수 역량의 유의성을 밝힌다.

• 한국환경보건학회지
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• 제31권2호
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• pp.134-146
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• 2005

Environmental monitoring system has been adopted and supplemented as inspection measures for the quantitative and qualitative changes of environmental impact assessment (EIA). This study compares the results of environmental impact assessment with the results of post-environmental investigation using a correction and principal component analysis (PCA) in the housing development project. Correlation analysis showed that most of air quality variables including TSP, $PM_{10},\;NO_2$, CO were linearly correlated with each other in the environmental impact assessment and the post-environmental investigation. In the water quality, pH and BOD were well correlated with the DO and SS, respectively. As a result of correlation analysis in the noise and vibration, noise in day and night and vibration in day and night were related to each other between EIA and the post-environmental investigation. From the results of analysis of soil, Cu with Cd, Cu with Pb, and Cd with Pb were related to each other in EIA. Principal component analysis (PCA) showed a powerful pattern recognition that had attempted to explain the variance of a large dataset of inter-correlated variable with a smaller set of independent variables (principal components). Principal component (PC1) and principal component (PC2) were obtained with eigenvalues> 1 summing almost $90\%$ of the total variance in the all of the items(air, water, noise, vibration and soil) in EIA and post-environmental investigation.

• Industrial Engineering and Management Systems
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• 제8권2호
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• pp.80-92
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• 2009

This paper addresses the inventory rationing issue embedded in the regional supply chain inventory replenishment problem (RSIRP). The concerned supply chain, which was fed by the national supply chain, consisted of a single warehouse distributing a single product to multiple stores (M-stores) with independent and normally distributed customer demand. It was assumed that the supply chain operated under the order-up-to level inventory replenishment system and had only one truck at the regional warehouse. The truck could make one replenishment trip to one store per period (a round trip per period). Based on current inventories and the vehicle constraint, the warehouse must make two decisions in each period: which store in the region to replenish and what was the replenishment quantity? The objective was to position inventories so as to minimize lost sales in the region. The warehouse inventory was replenished in every fixed-interval from a source outside the region, but the store inventory could be replenished daily. The truck destination (store) in each period was selected based on its maximum expected shortage. The replenishment quantity was then determined based on the predetermined order-up-to level system. In case of insufficient warehouse inventories to fulfill all projected store demands, an inventory rationing rule must be applied. In this paper, a new inventory rationing rule named Expected Cost Minimization (ECM) was proposed based on the practical purpose. The numerical results based on real data from a selective industry show that its performance was better and more robust than the current practice and other sharing rules in the existing literature.

• 품질경영학회지
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• 제49권4호
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• pp.505-525
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• 2021

Purpose: The purpose of this study was to investigate factors influencing the intention to use Fintech Digital Sand(D-Testbed), which facilitate digital innovation in the financial sectors and allow fintech startups to simulate the PoC their innovative ideas before starting a business. Methods: This study used the Extended Technology Acceptance Model (TAM2), with independent variables such as social influence, personal innovativeness, service quality, relative advantage, and security concerns used in previous studies, for analysis. For mediator variables, the perceived usefulness and perceived ease of use were used in this study. Results: The results indicated that social influence and perceived usefulness have a positive effect on the intention to use. It was also analyzed that relative advantage has a mediating effect on perceived usefulness whereas service quality nor personal innovativeness are not statistically significant mediation. On the other hand, perceived ease of use on the intention is not statistically significant. By this, it was confirmed that the intention to use Fintech Digital Sand(D-Testbed) was to improve the business performance of fintech companies, but not because it was easy to learn and take less effort. Conclusion: The finding of the study provides valuable implications for invigorating the use of fintech digital sandbox(D-testbed) and identifying the factors that affect the perception and intention to use among employees in fintech companies in advance.

• The Journal of Asian Finance, Economics and Business
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• 제8권5호
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• pp.127-134
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• 2021

This study aims to determine the role of innovative capabilities as a mediator in analyzing entrepreneurial marketing's effect on sustainable competitive advantage in food and beverage micro-, small-, and medium- enterprises (MSMEs). Data was obtained from a food and beverage store manager in Tangerang City, comprising 119 samples. Furthermore, the G⁎Power, a tool used to calculate statistical power analysis for various t-tests, F tests, χ2 tests, z tests, and several exact tests, was used to determine the number of research samples, the α error probability of 5%, and 3 variables. The data collection method used questionnaires with Likert Scale 1-5 to indicate strongly disagree to strongly agree. To analyze data, we used Path Analysis supported by SmartPLS statistics software. Path analysis is a form of multiple regression statistical analysis that is used to evaluate causal models by examining the relationships between a dependent variable and two or more independent variables. It aims to provide estimates of the magnitude and significance of hypothesized causal connections between sets of variables. The data processing process took place in two stages, namely the estimation model testing with validity and reliability, and the structural model testing to decide the impact or correlation between variables utilizing the t-test. The result showed a positive and significant effect of entrepreneurial marketing to innovative capability and competitive advantage through the innovative capability of MSMEs.

• 한국콘텐츠학회논문지
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• 제19권4호
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• pp.458-465
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• 2019

실험애니메이션은 실험정신 그 자체로 독립 예술애니메이션이자 작가주의적 실험정신으로 집약된 영상예술이다. 특히 노먼 맥라렌은 뛰어난 창의력과 감성으로 시각적 표현 기술에 대한 과학적 탐구와 상식을 초월한 실험을 통해 작품마다 독창적인 조형미를 추구하며 오늘날 영상매체의 혁신을 불러온 실험애니메이션의 거장으로써 애니메이션 작품의 미학적 가치는 매우 높다. 그러므로 다양한 기법의 도전으로 실험애니메이션의 영역을 확장하고 각 프레임 사이에서 일어나는 움직임 창조에 관한 끊임없는 탐구를 수행했던 노먼 맥라렌의 실험적 표현 방식을 분석하고 그가 집중한 움직임의 표현을 연구하는 것은 의미가 있다. 그 결과 그의 움직임 표현의 가장 큰 특징은 운동성의 반복과 변형의 반복으로 분석되었으며 이러한 도출이 실험 방식에 대한 단순 의문보다는 보다 구체적인 형태의 탐구가 요구되는 실험 방식의 실험애니메이션으로 이해되길 바란다. 또한 대학교육에서 애니메이션 창작의 가능성과 나아갈 방향을 심층적으로 모색하기 위한 선행 연구로 의미가 있기를 바란다.

• 산업경영시스템학회지
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• 제42권1호
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• pp.115-128
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• 2019

Small and Medium-sized Enterprises (SMEs) are being faced with rapid changes in their business environments due to evolution of technologies and innovation in societal eco-systems. Particularly, dynamic interactions between such environments and enterprise activities have become significant, so technology planning, which is a process of identifying appropriate directions regarding product and technology development, has received much attention to cope with such dynamics proactively. However, SMEs typically have limits in performing independent, strategical and systematical technology planning activities due to the lack of human, material and financial resources. This paper proposes the development of a product roadmapping method so that SMEs carry out efficient technology planning activities with interconnections of external business environments. The present work provides product roadmap templates that directly accommodate the influence of business environments on the product's system and its associated super/sub-systems with the use of external environment analysis techniques including TRIZ methodology, PEST and 5Forces analysis. These templates are useful to efficiently forecast the directions of product's development and evolution, which arise from changes in external environments. Consequently, the present work enables SMEs to flexibly cope with the era of the next R&D generation, which pursues value creation through mutual interconnection between business environments and technology development.