• Journal of the Korea Institute of Information and Communication Engineering
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• v.2 no.3
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• pp.359-365
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• 1998

The portable two way radio telephone amongst GMDSS equipment in the vessel is very important portable wireless one for search and rescue in distress situation. Although the portable two way radio telephone must be equipped with in the vessel by IMO & RR, other kinds of wireless tranceivers are widely used to communicate with crew members who are separately appointed at bridge forecastle and poop in leaving or arriving at the port, passing through a narrow canal or voyaging in the foggy weather, Most of those wireless tranceivers except portable two way radio telephone are allocated at 27MHz band with PTT simplex system that makes crew members difficult to work effectively in the vessel. In this research 900MHz band FDD(frequency duplex division) tranceiver system is studied to help crew members in the vessel to communicate with themselves freely and to work easily meanwhile with simple operation. 900MHz band FDD tranceiver system uses one chip FM frontend IC to realize the miniaturization and downsizing of tranceiver and small size head set attached to helmet. The credibility of this research's result is highly evaluated by circuit analysis with computer aided simulation, and partly modified 900MHz band cordless phone circuit.

• KSII Transactions on Internet and Information Systems (TIIS)
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• v.9 no.4
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• pp.1493-1515
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• 2015

A smart meter is one of the core components in Advanced Metering Infrastructure (AMI) that is responsible for providing effective control and monitor of electrical energy consumptions. The multifunction tasks that a smart meter carries out such as facilitating two-way communication between utility providers and consumers, managing metering data, delivering anomalies reports, analyzing fault and power quality, simply show that there are huge amount of data exchange in smart metering networks (SMNs). These data are prone to security threats due to high dependability of SMNs on Internet-based communication, which is highly insecure. Therefore, there is a need to identify all possible security threats over this network and propose suitable countermeasures for securing the communication between smart meters and utility provider office. This paper studies the architecture of the smart grid communication networks, focuses on smart metering networks and discusses how such networks can be vulnerable to security attacks. This paper also presents current mechanisms that have been used to secure the smart metering networks from specific type of attacks in SMNs. Moreover, we highlight several open issues related to the security and privacy of SMNs which we anticipate could serve as baseline for future research directions.

• The Korean Journal of Community Living Science
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• v.26 no.4
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• pp.617-632
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• 2015

This study examines the effects of paternal parenting behaviors, child-rearing involvement, and father-child communication perceived by children on their leadership. A total of 197 children selected from three elementary schools and their fathers participated in this study. Data were collected using a parenting behavior index, a child-rearing involvement inventory, a father-child communication inventory, and a children's leadership index and statistically analyzed using the t-test, a one-way ANOVA ($Scheff{\acute{e}}$ test), and a multiple regression analysis. The results show significant differences in children's leadership according to the father's education level, family income, the father's warmth/acceptance, the father's family activity involvement, and open/problematic communication between the father and the child. The child's age, the father's education level, family income, the father's warmth/acceptance, open communication, and problematic communication were significant predictors of the child's leadership. These results suggest that a child's leadership may be strengthened if the father is warmer and more accepting and has open communication with the child.

• The Journal of Korean Academic Society of Nursing Education
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• v.27 no.3
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• pp.298-305
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• 2021

Purpose: This study aims to identify the relationship between nursing students' social anxiety and communication ability, and in particular, to determine the mediating effect of self-efficacy. Methods: A total of 187 nursing students enrolled at four universities in Korea completed surveys between August and September 2020. The measurements included the Global Interpersonal Communication Competence Scale, self-efficacy scales, and interaction anxiousness scales. Data were analyzed using descriptive statistics, an independent t-test, one-way ANOVA, Pearson's correlation, multiple regression following the Baron and Kenny method, and bootstrapping for mediation. Results: Communication ability was significantly negatively correlated with social anxiety (r=-.61, p<.001) and significantly positively correlated with self-efficacy (r=.77, p<.001). Furthermore, self-efficacy had a partial mediating effect on the relationship between social anxiety and communication ability. Conclusion: The findings of this study suggest that communication ability can be improved if individual characteristics such as social anxiety and self-efficacy are considered. Therefore, when developing communication ability improvement programs for nursing students in the future, it is considered important to actively consider these personal characteristics.

• The Journal of the Convergence on Culture Technology
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• v.7 no.1
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• pp.58-65
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• 2021

Jewelry Object to adorn a body with has been a very important culture since the primitive age when history of human beings started. Ornaments for social status or wealth's symbolic icon otherwise for private embellishment have been developed with various properties such as decorative, monetary, scarce, historic ones. However, since the latter 20th century, when intellecture concept was more valuable than the tradition laying emphasis on preciousness, with counting of artistic activities and aesthetic values, they have had expressionistic tendency centered on artists. In this manner, modern ornaments have been developed as an artistic genre deviating from traditional way in which material or technology was emphasized. While this expressionistic tendency emphasized artistic value, galleries only for ornaments have been started since 1960s and especially from this period, a lot of experimental and revolutionary ornaments works deviating from traditional way have been exhibited. The appearance of galleries specialized in ornaments as described above had a great influence on the ornaments' development to an artistic genre. This study is the one in respect of two exhibition types through the combination of human body and clothes in displaying ornaments. The first one represents active displaying way for the communication with audience by introducing fashion show to galleries deviating from general exhibition way. The second one plans to run a project collaborating fashion brand for the communication between ornaments and clothes and represents displaying way in the shop of fashion brand for active exhibition publicity.

• The Journal of Korean Institute of Electromagnetic Engineering and Science
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• v.22 no.1
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• pp.24-29
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• 2011

Comparing conventional one-way relaying, two-way relaying scheme with network coding can achieve high throughput by reducing the transmission time. Coded cooperation protocol, which is a algorithm that uses coding on physical layer, can achieve high reliability. In this paper, we propose coded cooperation protocol over two-way relay network. Simulation results show proposed protocol has better performance in terms of reliability and throughput compare with conventional amplify and forward protocol. Also, with same throughput, proposed protocol has better performance in terms of reliability compare with the conventional hybrid decoded and forward protocol.

• Journal of the Korean Society of Food Culture
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• v.13 no.5
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• pp.431-460
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• 1998

After the Japanese Invasion of Korea in 1592, correspondents of Chosun called on Japan twelve times, as a mission, from 1607 to 1811. The suite of Chosun Communication Facilities (correspondents) was composed of nearly 500 people including a senior envoy, a junior envoy, other envoyes, and cooks. After preparing traveling expenses, Sifts, foods, medicinal stuffs, and ginseng, they shipped people and freight in three passenger ships and three freighters. They departed from Pusan for Edo(Tokyo). There were 28 stop-overs on their way to Edo and the banquet was given for them at every stop. The arrangements of the table for each banquet were made up of 753 Seon(tables), 3Jeup(soups) and 15Che(dishes). 753Seon(tables) is Ganban(the table for decoration) and a substantial food reception was composed of 3Jeup(soups) and 15Che(dishes). 753Seon(tables) was called Dadopoong(the food of refreshment) style and this was the standard arrangement of the banquet table in Japan. It was comprised of 3Jeup(soups) and 15Che(dishes). On their way from Edo to Thusima Island, food was afforded to correspondents for later preparation and dining. The banquet that the master of Thusima Island gave was composed of the first and second style banquets. The first one was Chusun style and the second one was Japanese style.

• Science of Emotion and Sensibility
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• v.8 no.1
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• pp.75-83
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• 2005

Cyberspace is on its way to experience dynamic change, hereby encompassing technical and social diversities and multiplicities. The internet, with a history of no more than 10 years, has drastically changed the way, meaning and conduct of our lives, the structure and function of society and communication. Even in psychology, in which the purpose is to scientifically look into the human mind and explore its behavior, the in-depth inquiry into the human behavior and psychological features of the cyberspace have become an increasingly important issue. Research suggests that psychological features and concepts brought about during the process of communication in cyberspace have been influenced by the digital mode following the analogue one, and by the online mode following the off line one. It also suggests that, with new issues peculiar to information society, cultural structures should be re-conceptualized, reconstructed and reevaluated in various fields. This approach to the changing role, meaning and style within society should be rearranged and referred to as cyber psychology.

• The KIPS Transactions:PartC
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• v.19C no.1
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• pp.9-18
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• 2012

In 2010, Pedro et al. proposed RFID distance bounding protocol based on WSBC cryptographic puzzle. This paper points out that Pedro et al.'s protocol not only is vulnerable to tag privacy invasion attack and location tracking attack because an attacker can easily obtain the secret key(ID) of a legal tag from the intercepted messages between the reader and the tag, but also requires heavy computation by performing symmetric key operations of the resource limited passive tag and many communication rounds between the reader and the tag. Moreover, to resolve the security weakness and the computation/communication efficiency problems, this paper also present a new RFID distance bounding protocol based on WSBC cryptographic puzzle that can provide strong security and high efficiency. As a result, the proposed protocol not only provides computational and communicational efficiency because it requires secure one-way hash function for the passive tag and it reduces communication rounds, but also provides strong security because both tag and reader use secure one-way hash function to protect their exchanging messages.

• Trans-
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• v.9
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• pp.67-92
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• 2020

The development of social platforms and digital technology has promoted the age of the communication in our society. As online communication has become commonplace, expressing feelings, thoughts and experiences on the Internet has become an everyday routine. Among them, SNS is one of the representative platforms for expressing oneself easily and interacting with other users. The way of communicating with the SNS about what they did and what experiences they experienced from one's everyday lives became more common. As a result, the museum makes various efforts to enhance visitors' attention and interest with the use of SNS. It provides a content-based programs and museum environment that allow visitors to enjoy playing and learning at the same time. This study will explore not only a simple appreciation, but also the way of communicating to everyday life in terms of the changes for museum environment through the development, implementation and adaptations of digital technology. Through this, mobile-based communication with SNS provides various values and quality of museum visit, can be completed with meaningful museum experience, and various roles and functions of the museum are examined in terms of social platform of experience.