• Journal of the Korea Society for Simulation
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• v.27 no.4
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• pp.27-45
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• 2018

The terrestrial communication network and the underwater acoustic communication network have very different communication characteristics each other in operational environments, communication media, propagation delay, frequency bandwidth, transmission speed, bit error rate, and so on. These different characteristics cause some different address schemes and different maximum transmission units and, as a result, these differences must form certainly obstacles to the intercommunication between a terrestrial communication network and an underwater acoustic communication network. In this paper, we presents a method to use the virtual addresses to resolve the interconnection problem caused by different address schemes between a terrestrial communication network and an underwater acoustic communication network, and, through a mathematical modeling, we analyze the performance on the message transceiving delay time in the underwater environment.

• The Journal of the Korea institute of electronic communication sciences
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• v.12 no.5
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• pp.755-762
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• 2017

In railway communication, LTE based railway wireless communication systems have been developed to support high data rate and reliable communication link. In this paper, the testbed of LTE based railway wireless communication systems is introduced. Then, we describe measurement results of communication performance such as radiation strength, communication coverage, call setup time, handover success rate, and data transmission rate in the testbed. We also consider requirements for commercialization based on measurement results.

• Journal of Satellite, Information and Communications
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• v.8 no.2
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• pp.44-49
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• 2013

LED communication is a wireless communication technology to transmit information using visible light coming out from the LED(Light Emitting Diode). It is a technique that can overcome RF(Radio Frequency) communication problems that are frequency allocations, human body hazards, security vulnerabilities, and interference between electronic devices. As a technique that can be used as lighting and communications with using LED, LED communication is suitable for ubiquitous environment. This paper introduces the process of data transmission algorithm for LED communication systems algorithm using LED, PD(Photodiode), and MCU(Micro Controller Unit).

• The Journal of the Korea Contents Association
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• v.13 no.12
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• pp.585-594
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• 2013

In this study, we studied methods of communication among audiences, artwork and artist and analyzed interactive media art using the nonverbal communication methods. We analyzed the 4 types of nonverbal communication based on sign and meaning[1] and reclassified suitably for analysis of interactive media art. According to the analysis result, we draw typical characters by analyzing interactive media artwork which were corresponding to the each types. Also we analyzed overlap area and classify. Through these processes, we found communication methods in interactive media artwork connect audiences and artwork by organic combination of several nonverbal communication. In this paper, we suggest a new approach about the communication among audiences, artwork and artist through analyzing interactive media art using nonverbal communication.

• The Journal of the Korea institute of electronic communication sciences
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• v.12 no.4
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• pp.555-560
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• 2017

Currently, railway wireless communication systems adopt several communication schemes depending on the specific region. To increase data rate and achieve high fidelity in railway wireless communication systems, LTE-R scheme has been developed. In this paper, We introduce interoperability technology which converges several railway communication systems including LTE-R. First, we consider two interoperability methods and their standardization. Some empirical test results of interoperability technology are also introduced. It is expected to provide seamless and statable railway communication environments by applying interoperability technologies to railway wireless communication systems.

• Korean Journal of Childcare and Education
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• v.13 no.2
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• pp.97-114
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• 2017

Objective: This study examined the association between mother-child communication and preschool children's peer competence mediated by ego resiliency Methods: The data from 318 preschool age children and their mothers in Seoul and Gyung-Gi province were used for this study. Mothers reported mother-child communication using three subscales from the revised parent-child communication inventory(Barnes & Oslom, 1982). This study used four subscales from the Korea Personality Inventory for Children (KPI-C)in order to calculate children's ego resiliency and used six subscales from the Child Behavior Scales(Ladd & Profile, 1996). The data were analyzed using Multiple Regression in SPSS 19.0. Results: Positive mother-child communication predicted a higher level of children's ego resiliency and peer competence. Ego resiliency fully mediated the association between mother-child communication and prosocial competence, rejection against peers and insecurity. And positive mother-child communication predicted lower levels of children's aggression, dissociality and irritability. Its association was also mediated by ego resiliency. Conclusion/Implications: These findings indicated that a mother's positive communication with their child would enhance children's ego resiliency and peer competence in preschool children. Thus, the efforts to facilitate parents' positive communication skills in parent education can be promising for preschool children's positive development.

• Journal of the Korean Society for information Management
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• v.36 no.2
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• pp.133-152
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• 2019

This study aims to identify and categorize the content and public use patterns of social scientists' informal communication activities. Using Twitter data, we identified Korean 736 social scientists who participated in communication activities with the public, and analyzed 4,548 tweets that revealed their informal communication activities. This study is meaningful in that it explored informal communication between social scientists and the public, which was not previously revealed in scholarly communication, and identified the types of informal communication activities, communication media, and collaborative sectors in detail.

• Journal of Engineering Education Research
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• v.15 no.1
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• pp.35-44
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• 2012

This paper analyzes characteristics and discourses related with the risk communication of Fukushima nuclear disaster. I try to pick up and analyze the three strategies of Korean government's and expert system's risk communication, and then understand the relationship between them and the role of expert system in the risk communication and the politics of expertise.

• Knowledge Management Research
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• v.18 no.1
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• pp.25-47
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• 2017

The present study investigates how communication styles of leaders affect job performance and organizational citizenship behavior (OCB) through followers' positive psychological capital. While previous studies have examined the relationships among positive psychological capital, job performance, and organizational citizenship behavior (OCB), much less known about the effect of communication styles of leaders. This study divides leaders' communication patterns into dogmatic communication and sociable communication. To verify hypotheses of this study, we used data collected from the fashion companies. 191 surveys were distributed and 142 responses were used for the analysis. Empirical results show that sociable communication of leaders has positive impact on followers' positive psychological capital, job performance, and OCB, while dogmatic communication style didn' t have a significant impact on positive psychological capital, job performance, and OCB. In addition, job performance is influenced strongly by followers' positive psychological capital than OCB in sociable communication condition. The results of this study suggest implications for understanding the important role of communication styles on the relationship between followers' psychological mind-set and job behavior. Future studies are required to solve the problems on the inconsistent results between dogmatic communication and followers' job attitudes. The theoretical and managerial contributions and the limitations were discussed.

• Journal of the Korea Institute of Information and Communication Engineering
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• v.6 no.7
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• pp.1038-1043
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• 2002

The demand for multimedia service using Ka-band satellite communication are growing rapi이y. So, in this paper, we have analyzed rain attenuation with typical model, and proposed prediction model of rain attenuation in high frequency(over 20[GHz]). Path loss model by rain attenuation is based upon rain rate of representative region(6 cities). Proposed prediction model of rain attenuation and parameter of satellite link can be available for the Ka-band satellite communication.