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변화준비성이 전사적 정보시스템의 수용에 미치는 영향에 관한 연구
곽기영 한국경영과학회 2006 한국경영과학회지 Vol.31 No.2
To rapidly respond to uncertainties in the business environment whilst remaining competitive, every organization needs to be able to successfully introduce and manage organizational change. Cognizant of the role of information systems (IS) as an enabler of organizational change, many organizations have paid attention to Enterprise Resource Planning (ERP) systems for successful organizational change primarily because of their change-driving forces across organizations. This study focuses attention on the role of readiness for change in the ERP systems adoption. Readiness for change described as views about the need for organizational change is posited to be an antecedent of two expectancies about the system, performance expectancy and effort expectancy, which lead to actual system use. Based on data gathered from the users of the ERP systems, structural equation analysis using LISREL provides significant support for the proposed relationships.
곽기영,여영구,김영곤,최경석,강홍,Kwak, Ki-Young,Yeo, Young-Gu,Kim, Young-Gon,Choi, Kyung-Seok,Kang, Hong 한국펄프종이공학회 2003 펄프.종이기술 Vol.35 No.4
The purpose of the present study is to identify the drying cylinder model in paper plants and to analyze characteristics of process responses for changes in input variables. The model developed in this work is based on actual plant operation data and the steam pressure applied to the cylinder behaves as one the main variables. It is found that heat transfer coefficients from the condensate to the canvas could be represented as empirical relations based on heat conductivities and operation date. The effectiveness of the cylinder model is demonstrated by the measured moisture contents and web temperature. Using transfer functions derived from the cylinder model stability of the drying process is analyzed.
곽기영,여영구,김영곤,최경석 한국화학공학회 2007 화학공학의이론과응용 Vol.10 No.1
본 연구에서는 제지 공장의 건조공정 내 실린더와 지필에서의 열 전달 공정에 대한 선형모델을 구하였다. 실제조업 및 측정 데이터에 근거하여 정상상태의 PDE모델을 구하고 실린더 및 지필두께의 profile에 따라 시간의 변화에 대하여 실린더와 지필의 온도변화 및 수분함량의 변화를 알아보았으며 PDE모델을 선형화하여 상태공간모델로 유도하여 전달함수를 도출하였다. 아울러 선정된 입력변수를 변화시켜 공정의 동특성을 파악하고 안정성을 규명하였다. 또한 정확도가 입증된 neural network를 이용한 모델과의 비교 분석을 통하여 PDE모델의 유효성을 검증하였다.
계단 하강 보행 동안 체성감각 자극이 노인의 하지 관절 역학에 미치는 영향
곽기영,소하주,김성현,양윤석,김남균,김동욱,Kwak, K.Y.,So, H.J.,Kim, S.H.,Yang, Y.S.,Kim, N.G.,Kim, D.W. 대한의용생체공학회 2011 의공학회지 Vol.32 No.2
The purpose of this study was to investigate lower-limb joint torque of the two groups as it changed by somatosensory stimulation during the descent down three stairs of different heights and to describe the difference between the two groups, which are young people group and elderly people group. Subjects of each groups climbed down a stair at four stimulation conditions, which are non-stimulation, tibialis anterior tendon stimulation, achilles tendon stimulation, tibialis anterior - achilles tendon stimulation. Motion capture data were collected using 3D optoelectric motion tracking system that utilizes active infrared LEDs, near infrared sensor and force plate. The obtained motion capture data was used to build 3D computer simulation model. The results show that lower-limb joint torque of the two groups changed with somatosensory stimulation as they descended the stairs and the joint torque of the two groups differed from each other.
The Impacts of Social Networks on Individual Adaptation to Technochanges
곽기영 한국경영정보학회 2011 Asia Pacific Journal of Information Systems Vol.21 No.1
Despite the growing attention to the effective utilization of ICT system in workplace, there is an accumulation of evidence from the literature indicating that organizations do not utilize newly introduced ICT systems to their full functional potential and an amount of new implementations continue to fail. We explore the reasons for the underutilization of new ICT by focusing on the individuals’ social networks. This paper investigates how the social networks influence individual adaptation to the new ICT and its related performance. Based on the coping theory, we establish a research model that explains the coping mechanism. Collected data are analyzed to test the proposed model and its hypotheses using PLS and UCINET. The results show that the coping effort mechanism of individuals can be explained in terms of their positions within social networks. We conclude the paper by discussing theoretical and practical implications for the research findings and by proposing future studies.
The Effects of Use of Instant Messenger on Purchase Intention: The Context of Chinese C2C E-Commerce
곽기영,갈희,이정민 한국경영정보학회 2012 Asia Pacific Journal of Information Systems Vol.22 No.2
In recent years, C2C e-commerce has become more and more popular in China. Chinese C2C buyers use an instant messaging more commonly during transactions compared to other countries, which seems to be an interesting phenomenon. Based on the Chinese market, this study aims to examine the role of instant messenger in the C2C e-commerce context and to find how it impacts buyers’ purchase intentions. In addition to use of instant messenger, we brought in two antecedents of purchase intention-trust for vendor and customer satisfaction-to establish a theoretical research model. Through an online questionnaire survey, we tested and analyzed the research model and its related hypotheses. Structural equation modeling was used to analyze the data, and the results indicated that use of instant messenger did not directly influence purchase intention but had positive effects both on trust for vendor and customer satisfaction, which in turn influenced purchase intention. In conclusion, we discussed the research findings and suggested some implications for researchers and practitioners.