• The Journal of the Korea Contents Association
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• v.15 no.12
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• pp.129-140
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• 2015

The objective of this study is mainly to examine factors affecting utilization of graphical emoticons in the environment of mobile messenger. For this purpose, this research identified several determinants including demographic variables that have influences on utilization of graphical emoticons by an overview of prior research on Big 5 model and Uses and Gratification (U & G). An online survey was employed to collect data, and hierarchical regression analysis was used for data analysis. The results showed that females and younger respondents have higher utilization of graphical emoticons than males and the older. The findings also showed that extraversion as personal traits has influences on the utilization. And they indicated that people increase their utilization of graphical emoticons when they want to communicate with others efficiently and succinctly, and to follow the trend. The practical and theoretical implications of the findings in this study are also discussed.

• Journal of the Korean Professional Engineers Association
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• v.31 no.1
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• pp.9-16
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• 1998

For the flow facing high1y informationized age, there is a flow from fixed communications connecting fixed places such as offices and homes to mobile communications connecting mobile objets such as automobiles, ships and aircraft. This flow has added to diversifying communications Including data and images. While the axed mode is diversifying information media by digitalization of communications network and computers, the mobile mode has brought higher sophistication of communication modes by a higher degree of electric wave utilization. The following descriptions outlines the mobile communication which is utilizing the electric wave phenomena. In sequence the following items are described: a brief history of mobile communications, the technical object and various kinds of services, propagation of electric wave signal.

• Journal of the Korean Professional Engineers Association
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• v.31 no.2
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• pp.65-72
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• 1998

For the flow facing highly informationized age, there Is a flow from fixed communications connecting fixed places such as offices and homes to mobile communications connecting mobile objets such as automobiles, ships and aircraft. This flow has added to diversifying communications including data and images. While the fixed mode Is diversifying information media by digitalization of communications network and computers, the mobile mode has brought higher sophistication of communication modes by a higher degree of electric wave utilization. The following descriptions outlines the mobile communication which Is utilizing the electric wave phenomena. In sequence the following items are described: a brief history of mobile communications, the technical object and various kinds of services, propagation of electric wave signal.

• Journal of Communications and Networks
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• v.7 no.3
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• pp.367-376
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• 2005

The smooth handoff supported by the route optimization extension to the mobile IP standard protocol should support a packet buffering mechanism at the base station (BS), in order to reduce the degradation in TCP performance caused by packet losses within mobile network environments. The purpose of packet buffering at the BS is to recover the packets dropped during intersubnetwork handoff by forwarding the packets buffered at the previous BS to the new BS. However, when the mobile host moves to a congested BS within a new foreign subnetwork, the buffered packets forwarded by the previous BS are likely to be dropped. This subsequently causes global synchronization to occur, resulting in the degradation of the wireless link in the congested BS, due to the increased congestion caused by the forwarded burst packets. Thus, in this paper, we propose an implicit priority forwarding (IPF) packet buffering scheme as a solution to this problem within mobile IP based networks. In the proposed IPF method, the previous BS implicitly marks the priority packets being used for inter-subnetwork handoff. Moreover, the proposed modified random early detection (M-RED) buffer at the new congested BS guarantees some degree of reliability to the priority packets. The simulation results show that the proposed IPF packet buffering scheme increases the wireless link utilization and, thus, it enhances the TCP throughput performance in the context of various intersubnetwork handoff cases.

• The Journal of the Korea Contents Association
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• v.21 no.1
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• pp.39-54
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• 2021

This study aim to demonstrate and categorize the status of level of mobile information utilization of the 2030 youth generation, and to identify factors that may affect the digital divide within the generation. For this purpose, 1779 data were analyzed using materials for the 2018 digital divide survey in Korea Ministry of Science and ICT. According to the level of information utilization, the consumers were categorized into three types : reference group (46.5%), high utilization group (27.2%), and low utilization group (26.3%). There were statistically significant differences in demographics variable, consumer capabilities, living satisfaction by type of consumer. In addition, the factors influencing the digital divide of the high utilization group and low utilization group were identified compared to the reference group. It is meaningful that this study confirmed the actual gap of information utilization and raised the possibility of the digital divide within the 2030 youth generation.

• Journal of dental hygiene science
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• v.24 no.3
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• pp.208-220
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• 2024

Background: Although a direct association has been established between oral health management and maintaining military combat readiness and fulfilling defense duties, unmet dental-care needs have been consistently reported, and there has been little research on the role of mobile healthcare services in addressing this issue. This study explored the association between unmet dental-care needs and the intention to use mobile healthcare services among military personnel. Methods: This study was conducted on military personnel who visited a military hospital in Gyeonggi-do, Korea, from August 19 to August 31, 2024. A total of 150 self-administered questionnaires were distributed and 135 valid responses were analyzed. The analysis included general characteristics, dental care utilization, and intention to use mobile healthcare services. Statistical analyses, such as t-tests, ANOVA, and multiple regression, were employed to determine the factors influencing the intention to use mobile healthcare services. Results: This study found that military personnel with unmet dental-care needs had significantly higher intentions to use mobile healthcare services than those without such needs. The analysis revealed that the key factors influencing this intention were perceived health status and previous dental-care utilization. Specifically, participants who rated their overall health as better and those who had used dental care services in the past year showed a greater tendency to express interest in mobile healthcare services than those who did not. Furthermore, unmet dental-care needs were more prevalent among soldiers who reported limited access to dental facilities owing to time constraints or a lack of prioritization of oral health, which increased their inclination toward utilizing mobile healthcare solutions as an alternative. Conclusion: Mobile healthcare solutions can offer personalized and timely care as viable alternatives for improving oral health management in the military. Moreover, integrating mobile healthcare services into military health systems could significantly reduce unmet dental-care needs and enhance overall combat readiness by promoting better health outcomes.

• Journal of Information Processing Systems
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• v.17 no.6
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• pp.1097-1114
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• 2021

The primary objective of this work was to discover a solution for the survival of people in an emergency flood. The geographical information was obtained from remote sensing techniques. Through helpline numbers, people who are in need request support. Although, it cannot be ensured that all the people will acquire the facility. A proper link is required to communicate with people who are at risk in affected areas. Mobile sensor networks with field-programmable gate array (FPGA) self-configurable radios were deployed in damaged areas for communication. Ad-hoc networks do not have a centralized structure. All the mobile nodes deploy a temporary structure and they act as a base station. The mobile nodes are involved in searching the spectrum for channel utilization for better communication. FPGA-based techniques ensure seamless communication for the survivors. Timely help will increase the survival rate. The received signal strength is a vital factor for communication. Cognitive radio ensures channel utilization in an effective manner which results in better signal strength reception. Frequency band selection was carried out with the help of the GRA-MADM method. In this study, an analysis of signal strength for different mobile sensor nodes was performed. FPGA-based implementation showed enhanced outcomes compared to software-based algorithms.

• The KIPS Transactions:PartC
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• v.13C no.2 s.105
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• pp.227-234
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• 2006

In this paper, we propose a window based resource reservation scheme to minimize an waste bandwidth due to resource reservation in mobile networks. Specially, this scheme decides a proper timing to reserve resource by using the number of movement, which is provided by the differentiated handoff estimation model, among inner regions. In the previous resource reservation scheme[6], it requests a resource reservation to neighboring cells as soon as a mobile host enters or creates into a cell. But, after a proper time based on the number of movements in the differentiated handoff estimation model passes, the proposed scheme requests a resource reservation to neighboring cells. Because of this reason, it can improve resource utilization on mobile networks. And, this scheme differentiates resource reservation according to a request ratio for resource reservation to each neighboring cell. Also, this scheme improves resource reservation acceptance rate and bandwidth utilization.

• The Journal of the Korea Contents Association
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• v.18 no.9
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• pp.178-198
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• 2018

This study examines the effects of transformational leadership on helping behavior for the secretary workers. We also demonstrate comprehensively the moderating effects of job resources(LMX) and job demands(utilization of mobile devices after work) on the relationship between transformational leadership and helping behavior. The results of this study targeted 140 incumbent secretaries are as follows: First, transformational leadership has a significant positive effect on the helping behaviors of members. Second, the interaction effect of LMX(synergistic effect) was verified in the positive relationship between transformational leadership and helping behavior. Finally, interaction effects of utilization of mobile devices after work(buffering effect) were confirmed in the relationship between transformational leadership and helping behavior. The results of this study are that transformational leadership of middle managers is important to strengthen worker's helping behavior, but it is also important to understand the contextual factors such as social support(LMX) and work environment(utilization of mobile devices after work) that affect the will and autonomy of members in accepting leadership. Finally, we suggest the theoretical and practical implications of this study, present limitations and future research directions.

• Journal of Service Research and Studies
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• v.13 no.1
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• pp.76-95
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• 2023

As information and communications technology-based "smart hospitals" and "digital healthcare" have become a hot topic in the healthcare field, hospital mobile apps are gaining attention; but, the utilization rate is low due to lack of publicity, unstable systems, and late updates. In this situation, systematic research is needed to increase the utilization rate of hospital mobile apps, but related research has been rare. Therefore, this study integrates the information systems success model (ISSM) from the technical perspective and the expectation-confirmation model (ECM) from the cognitive perspective to demonstrate the influence mechanism on the continuous use intention of hospital mobile apps. For this purpose, an online survey was conducted among 181 Korean adults who have used hospital mobile apps. The results of the structual equation modeling showed that most of the quality factors have significant effects on expectation confirmation, perceived usefulness, and satisfaction. Additionally, expectation confirmation significantly affects perceived usefulness and satisfaction, and both perceived usefulness and satisfaction significantly affect the continuous use intention of hospital mobile apps. This study is of importance in that it integrates the ISSM and ECM and applies them to the context of using hospital mobile apps, which are underutilized in the healthcare field, and provides practical implications for increasing the utilization rate of hospital mobile apps and operating effective and efficient services through the findings.