• KSII Transactions on Internet and Information Systems (TIIS)
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• 제11권9호
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• pp.4301-4319
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• 2017

Adopting mobile chargers (MC) in rechargeable wireless sensors network (R-WSN) to recharge sensors can increase network efficiency (e.g., reduce MC travel distance per tour, reduce MC effort, and prolong WSN lifetime). In this study, we propose a mechanism to split the sensing field into partitions that may be equally spaced but differ in distance to the base station. Moreover, we focus on minimizing the MC effort by providing a new charging mechanism called the sector-based charging schedule (SBCS), which works to dispatch the MC in charging trips to the sector that sends many charging requests and suggesting an efficient sensor-charging algorithm. Specifically, we first utilize the high ability of the BS to divide the R-WSN field into sectors then it select the cluster head for each sector to reduce the intra-node communication. Second, we formulate the charging productivity as NP-hard problem and then conduct experimental simulations to evaluate the performance of the proposed mechanism. An extensive comparison is performed with other mechanisms. Experimental results demonstrate that the SBCS mechanism can prolong the lifetime of R-WSNs by increasing the charging productivity about 20% and reducing the MC effort by about 30%.

• KSII Transactions on Internet and Information Systems (TIIS)
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• 제6권1호
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• pp.131-146
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• 2012

As one of the four basic technologies of IOT (Internet of Things), M2M technology whose advance could influence on the technology of Internet of Things has a rapid development. Mobile Payment is one of the most widespread applications in M2M. Due to applying wireless network in Mobile Payment, the security issues based on wireless network have to be solved. The technologies applied in solutions generally include two sorts, encryption mechanism and authentication mechanism, the focus in this paper is the authentication mechanism of Mobile Payment. In this paper, we consider that there are four vital things in the authentication mechanism of Mobile Payment: two-way authentication, re-authentication, roaming authentication and inside authentication. Two-way authentication is to make the mobile device and the center system trust each other, and two-way authentication is the foundation of the other three. Re-authentication is to re-establish the active communication after the mobile subscriber changes his point of attachment to the network. Inside authentication is to prevent the attacker from obtaining the privacy via attacking the mobile device if the attacker captures the mobile device. Roaming authentication is to prove the mobile subscriber's legitimate identity to the foreign agency when he roams into a foreign place, and roaming authentication can be regarded as the integration of the above three. After making a simulation of our proposed authentication mechanism and analyzing the existed schemes, we summarize that the authentication mechanism based on the mentioned above in this paper and the encryption mechanism establish the integrate security framework of Mobile Payment together. This makes the parties of Mobile Payment apply the services which Mobile Payment provides credibly.

• 한국전자통신학회논문지
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• 제18권6호
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• pp.1177-1188
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• 2023

사회적으로, 조직들은 보유한 정보 자원의 엄격한 관리를 요구받고 있으며, 정보보안을 위한 기술과 정책에 투자를 높이고 있다. 반면, 조직원에 의한 정보 노출 위협은 지속해서 발생하고 있다. 연구의 목적은 보안정책에 의해 발생할 수 있는 업무 스트레스의 부정적 영향을 감소하는 방안을 제시하는 것이다. 세부적으로, 연구는 조직 환경(보안정책 목표 설정), 개인의 업무 지향성(조절초점) 요소를 반영하여, 업무 스트레스 완화 메커니즘을 제시하고자 하였다. 연구는 정보보안을 엄격하게 활용하고 있는 금융업 근로자에게 설문하였으며, 확보된 309건의 표본을 적용하여 가설을 검정하였다. 분석 결과, 연구는 보안정책 목표 관련 난이도와 구체성이 업무 스트레스(갈등, 모호성)를 감소시키고, 준수 의도에 영향을 주는 것을 확인하였다. 또한, 개인의 업무 향상 초점이 업무 스트레스와 상호작용 효과를 가져, 준수 의도에 미치는 부정적 영향을 축소할 수 있음을 확인하였다. 연구의 결과는 조직원의 보안 준수 강화를 위한 조직의 보안 전략 수립에 의미를 제공한다.

• The Journal of the Acoustical Society of Korea
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• 제29권2E호
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• pp.55-63
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• 2010

High Intensity Focused Ultrasound (HIFU) is a noninvasive surgical method mainly targeting deeply located cancer tissue. Ultrasound is generated from an extemally located transducer and the beam is focused at the target volume, so that selective damage can be achieved without harm to overlying or surrounding tissues. The mechanism for cell killing can be combination of thermal and cavitational damage. Although cavitation can be an effective means of tissue destruction, the possibility of massive hemorrhage and the unpredictable nature of cavitational events prevent clinical application of cavitation. Hence, thermal damage has been a main focus related to HIFU research. 2D phased array transducer systems allow electronic scanning of focus, multi-foci, and anti-focus with multi-foci, so that HIFU becomes more applicable in clinical use. Currently, lack of noninvasive monitoring means of HIFU is the main factor to limit clinical applications, but development in MRI and Ultrasound Imaging techniques may be able to provide solutions to overcome this problem. With the development of advanced focusing algorithm and monitoring means, complete noninvasive surgery is expected to be implemented in the near future.

• 한국컴퓨터정보학회논문지
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• 제22권4호
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• pp.91-97
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• 2017

In this paper, we propose a Recently, the use of Smart phones surge in youth the youth are becoming a big addiction social problems Mobile Messenger. The prevalence of Smart phones is Mobile Messenger, access time, spatial constraints for assured. As a result, pc room, with a focus on traditional Internet addiction is to be reduced, whereas with a focus on Mobile Messenger Smartphone addiction level is rapidly on the rise. Korea information agency of Internet addiction and mobile addiction risk appeared to be well over 10 percent of the rate of 35% is gaming and mobile addiction unfolds exemplifies the seriousness of Messenger. Addiction is the individual's psychosocial problems such as negative consequences can result, causing the addiction, because it is necessary for an understanding of the mechanism. In this study, Mobile Messenger, the leading factors affecting the addiction said. Mobile Messenger is a major factor causing the addiction habit and consider the user's satisfaction. And social relations and the formation of plougastel Wu Mobile Messenger and its impact on the cause of addiction.

• 동의생리병리학회지
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• 제30권6호
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• pp.412-418
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• 2016

The emergence of systems biology in the 21st century is changing the paradigm of biomedical research. Whereas the reductionist approaches focus on components rather than time or contexts, systems biology focus more on interrelationships, dynamics, and contexts. The key ideas of the systems biology shares much with the philosophy of Korean Medicine(KM) and therefore, the paradigm shift is shedding light on understanding the mechanism of action of KM at system level. In this article, I provide a guide to learning systems biology for KM researchers using online learning resources. Thanks to the recent development of MOOC(massive open online courses) and other online learning platforms, learners can access to plenty of high-quality resources from top-tier universities in the world. I expect this guide help researchers to employ systems biology methods into their KM researches, and will lead to the development of future curricula for training "bi-lingual" experts, KM and computational approaches.

• 기술혁신학회지
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• 제6권1호
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• pp.1-19
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• 2003

The mechanism of knowledge production in the basic science has been changed throughout the development process in Korea. During the 1970s, the focus resides in the support of individual scientists while it concentrated on the support of research organization, centered on center of excellence from the 1980s. The change in the sup-porting mechanism to basic science result in the transformation of knowledge production system in the university and impact on the behavior of individual scientists. This paper focuses on the co-evolution process between newly adopted supporting program for basic science and the knowledge production system via the case study of representative program of center of excellence supporting program in Korea.

• 한국정보과학회:학술대회논문집
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• 한국정보과학회 2003년도 봄 학술발표논문집 Vol.30 No.1 (B)
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• pp.10-12
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• 2003

Since building large-scale software is usually bi9 burden to most developers, it has been an important issue for many researchers. In this paper, we suggest a mechanism that can be used to support such large-scale development. Through composition rules via subtyping within Statecharts, incremental construction of software can be achieved. Among the composition rules (i.e. delegation rule and mixin rule), we mainly focus on the delegation rule in our work. Not only we can check the subtype property. but also can verify the behavior compatibility of composite results that are available by composition rules. This new mechanism is helpful for analysts as well as designers, and it can be used as a guideline for incremental and compatible construction of component based software.

• 한국시스템다이내믹스연구
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• 제7권2호
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• pp.5-20
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• 2006

In the advent of ubiquitous information technology (u-IT) as a new emerging horizon of information society, inflated expectations regarding u-IT are growing very fast and higher than those made in the past, which would perhaps result in serious bust after boom and incur tremendous amount of social costs. This paper thus investigates a dynamic mechanism underlying the coevolution between information technology and society by applying systems thinking, particularly, with a focus on the typical phenomenon, 'hype curve' which shows how new technologies initially grow too fast for their own good, crashing from a peak of inflated expectations into a trough of disillusionment before stabilizing on a plateau of productivity. Three basic questions are explored to answer by investigating the mechanisms underlying the 'boom-bust' phenomenon: First, why hype curve appears in the process of technology and society coevolution. Second, how to enhance the stabilization level. Third, when is the right time for the policy intervention.

• 한국기술혁신학회:학술대회논문집
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• 한국기술혁신학회 2006년도 The 1st China-Korea Conference on Innovation Studies
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• pp.93-100
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• 2006

This paper deals with Government-Industry-University-Academy (G-I-U-A) collaboration mechanism in China from the perspective of National Innovation Systems (NIS) theory. The focus of the article is on the analytical and methodological issues arising from the G-I-U-A collaboration. How the O-I-U-A collaboration changes in China is identified here. After some review of academic research, the paper reveals the key roles which Government, Industry, University and Academy should play. According to the government behavior in innovation activities, a G-I-U-A collaboration mechanism with Chinese characteristics is provided in the paper.