• Journal of Korea Water Resources Association
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• v.40 no.9
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• pp.743-754
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• 2007

This study theoretically compared three possible methods for the ground-truth, that is three ground-truth designs of radar rainfall using the rain gauge rainfall. Theoretical results derived are first applied to the rainfall field generated by the Waymire-Gupta-Rodriguez Iturbe(WGR) model, and then to the Mt. Gwanak radar data using the rain gauge data from MOCT within the radar range of observation. Overall application results were found to be similar to those from theoretical studies, also those from the application to the WGR rainfall field. In conclusion, the ground-truth design using only positive(+) rainfalls from both radar and rain gauges causes serious design bias to be inappropriate as a ground-truth design.

• Journal of Science Education
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• v.37 no.1
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• pp.233-243
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• 2013

The purpose of this study is to develop the syringe experiment device which is able to analyze the relationship between the length of the air pillar and resonance frequencies quantitatively for the education of sound resonance. We made an air pillar resonance device with a 'Head', which is used by the disposable syringe and the plastic sphere for constructing molecular models. We also assembled PC experiment equipment which is used by commercial software. As a result, it appears this equipment can be used instead of the current device used by experts. It was proved that this syringe device is not the 'pipe' but the 'Helmholtz resonator'. It appears that data through resonance experiments can prove the sound resonance phenomenon. In conclusion, this syringe resonator is the experiment device that can be used in the gifted education for middle-high school students and acoustic experiments for university students.

• The Journal of the Korea Contents Association
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• v.16 no.6
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• pp.726-738
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• 2016

This paper aims to examine structural relationship between the influence factors of customer loyalty, hypothesizing that m-CRM characteristics, market orientations, relationship quality and relationship length plays a crucial role in achieving customer loyalty in insurance companies. Total of 255 valid sample data were used to test study hypotheses. By using Structure Equation Modeling(SEM) method, the results show that m-CRM characteristics and customer orientation significantly influence to relationship quality except competitor orientation and all relationship quality are very significantly influence to customer loyalty being consisted of customer retention and word of mouth effect. In addition, the modulation effect of relationship length is confirmed about relationship between relationship quality and customer loyalty. A real situation we conducted our research may enable academics and practitioners to understand the antecedents and outcomes of m-CRM implementation in terms of market orientation.

• The Journal of the Korea Contents Association
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• v.17 no.8
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• pp.130-143
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• 2017

This study examines the theoretical framework of "B" local union, which conducts "class-oriented" labor movements in contemporary Japan. "Class-oriented" labor movements are active, while they have been residual on the margins of Japanese society and the country's labor movement situation. This research examines a theoretical framework for "class-oriented" labor movements and investigates Williams' "structure of feeling." First, the "structure of feeling" concept is examined. Second, the study compares several theories on the working class of Marxism and alternative subjects of "linguistic turn." Third, this study redefines the "structure of feeling" in terms of the case of "B" local union. The results show that "collective workers-individualize workers" and "workers-non-workers" of "B" local union establish their own labor movements on the material or immaterial space and consider their "structure of feeling" as the "negotiation and contradiction on the class-orientation." Consequently, this study offers a model of their "structure of feeling."

• The Journal of the Korea Contents Association
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• v.20 no.10
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• pp.554-565
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• 2020

This study found out a process of effects of professional identity recognized by social workers on their job satisfaction and organizational commitment, and verified a mediated effect caused by working environment through the process. A survey for data collection was conducted among 205 employees of social welfare facilities located in Gyeonggi Province. Collected data was analyzed by using structural equation modeling. The data analysis showed that first, professional identity has an extremely meaningful positive effect on job satisfaction. Second, professional identity has a meaningful positive effect on organizational commitment. Third, working environment has a partial mediated effect on relationships between professional identity and job satisfaction, between professional identity and organizational commitment. These results proved that the enhancement of job satisfaction and organizational commitment of social workers is based on enhancing professional identity, and organizational commitment can be enhanced by the working environment. Based on the results, this study discussed practical plans for enhancing job satisfaction and organizational commitment of social workers.

• Journal of the Korea Institute of Information and Communication Engineering
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• v.20 no.4
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• pp.847-856
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• 2016

Flipped learning is a pedagogic model in which the typical lecture and homework elements of a course are reversed. Short video lectures or e-learning contents or other learning materials are viewed by students at home before the in-class session, while students are mainly carried out diverse active learning activities such as the discussions, exercises, team projects and so on in class time. Recently flipped learning has been emerging as an effective teaching-learning method that can train the 21st century talents who can create creative values based on fusion competencies. Based on the experience in applying the flipped learning to the database class that is an elective course of the school of computer engineering through three semesters, this paper proposes a flipped learning model consists of 7 steps in detail. Also, this paper analyzes the effects and weak points of the flipped learning and proposes several things for the successful flipped learning application.

• The Transactions of the Korean Institute of Power Electronics
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• v.9 no.6
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• pp.592-601
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• 2004

The performance of active power filter depends on the inverter characteristic, the control method, and the accuracy of reference signal generator. The accuracy of reference signal generator is the most critical item to determine the performance of active power filter. This paper introduces a novel reference signal generator composed of improved adaptive predictive filter. The performance of proposed reference signal generator was verified by means of simulation with MATLAB. The application feasibility was evaluated by building and experimenting a single-phase active power filter based on the proposed reference generator, which was implemented in the DSP(digital signal processor) TMS320C31. Both simulation and experimental results confirm that the proposed reference signal generator can be utilized for the active power filter.

• The Journal of Korean Institute of Communications and Information Sciences
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• v.22 no.11
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• pp.2543-2551
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• 1997

This paper proposes a compression technique of image data, a variable length PN code and channel models which are required in CDMA communication system. It also analyzes their performances. Original images is compressed by 2-D DCT and its coefficients are quantized by optimal quantizer at compression rate 0.84bit/pel. Channel model 1 and 2 which are composed of 5 and 4 channels respectively are employed to be used in CDMA. Such a situation forces us to empoly variable length PN code, such as Chebyshev map for spread spectrum system. When average PN code length of model 1 and 2 is 44.4 and 26.7 chips respectively, the received image through these models under Gaussian noise with variance 1.75 is visually of the same quality as the transmitting image. Thus, the model 2 appears to be better in channel efficiency, comparing with channel model 1 and channel model which uses fixed length PN code.

• Journal of Korean Library and Information Science Society
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• v.46 no.4
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• pp.471-491
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• 2015

The purpose of this paper is to examine the structural relationship between the use of a web medium and learning commitment to develop creative talent for higher media integrated Korean classical literature education. For this we used DBs of The 'Encyclopedia of Korean Local Culture(a local culture DB)' built by the Academy of Korean Studies, and a survey was conducted on 418 high school students, attending a classical literature class which used a local culture DB. The result of this study demonstrates media usefulness of local culture DBs' positive effect on learning commitment. Specifically, media richness and media experience affects the learning commitment through the medium usefulness. These results indicate that in order to encourage learner's medium experience and increase medium richness it is necessary to increase the utilization of mediums, such as local culture DBs.

• The Journal of Society for e-Business Studies
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• v.9 no.3
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• pp.1-16
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• 2004

The purpose of this study is to explore the nature of supply chain partnership, and to find the factors influencing the supply chain partnership success. For this, relationship commitment and trust were used as the basic components of the supply chain partnership. Also we identified strategic fit, interdependence, compatibility, and communication as determinants of supply chain partnership. Based on the statistical analysis of the sample of Korean corporations, it was found that relationship commitment and trust were shown to be significant factors influencing the supply chain partnership success. In addition, the findings reveal that strategic fit, interdependence, compatibility, and communication will facilitate supply chain partnership. More specifically, strategic fit and interdependence have a significant positive influence on relationship commitment. Also, compatibility and communication have a significant positive influence on trust. There result, in short, supported the importance of supply chain partnership for the successful SCM.