• Korean Journal of Microbiology
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• v.54 no.4
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• pp.343-353
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• 2018

Our previous research demonstrated the essential role of the xenB gene in stress response to RDX by using Pseudomonas sp. HK-6 xenB knockout. We have extended this work to examine the cellular responses and altered proteomic profiles of the HK-6 xenA knockout mutant under RDX stress. The xenA mutant degraded RDX about 2-fold more slowly and its growth and survival rates were several-fold lower than the wild-type HK-6 strain. SEM revealed more severe morphological damages on the surface of the xenA mutant cells under RDX stress. The wild-type cells expressed proportionally-increased two stress shock proteins, DnaK and GroEL from the initial incubation time point or the relatively low RDX concentrations, but slightly less expressed at prolonged incubation period or higher RDX. However the xenA mutant did not produced DnaK and GroEL as RDX concentrations were gradually increased. The wild-type cells well maintained transcription levels of dnaA and groEL under increased RDX stress while those in the xenA mutant were decreased and eventually disappeared. The altered proteome profiles of xenA mutant cells under RDX stress also observed so that the 27 down-regulated plus the 3 up-regulated expression proteins were detected in 2-DE PAGE. These all results indicated that the intact xenA gene is necessary for maintaining cell integrity under the xenobiotic stress as well as performing an efficient RDX degradation process.

• The Journal of the Korea Contents Association
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• v.21 no.6
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• pp.155-164
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• 2021

The purpose of this study investigates how the audience evaluation on independency of broadcasting and news credibility of KBS and MBC affect their channel brand equity(cognition, image, loyalty, and quality). The results indicate that the audience evaluation on news credibility of KBS and MBC has stronger influence on channel brand equity than the one of independency of broadcasting. On ages, the older generation group has more positive perception on channel image and loyalty of KBS than the college student group and the college student group has more positive perception on channel cognition and quality of MBC than the older generation group. On political traits, the politically conservative groups of both KBS and MBC have more positive perception on independency of broadcasting, news credibility, and channel brand equity than the other groups. Consequently, public broadcasting systems should improve the credibility of news for securing independency of broadcasting. These systems make audience change their perception toward public broadcasting as recovering integrity of news and improving professionalism of news. Public broadcasting systems should conduct a further research to improve the management of channel brand equity by studying audiences' age and political traits.

• Journal of the Computational Structural Engineering Institute of Korea
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• v.34 no.3
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• pp.167-174
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• 2021

Recent investigation into the integrity of nuclear containment buildings has highlighted the importance of developing an elaborate diagnostic method to evaluate the distribution and size of cavities inside concrete walls. As part of developing such a method, this paper presents a finite element approach to modeling elastic waves propagating in the containment building walls of a nuclear power plant. We introduce a perfectly matched layer (PML) wave-absorbing boundary to limit the large-scale nuclear containment wall to the region of interest. The formulation results in a semi-discrete form with symmetric damping and stiffness matrices. The transient elastic wave equations for a mixed unsplit-field PML were solved for displacement and stresses in the time domain. Numerical results show that the sensitivity of displacement, velocity, acceleration, and stresses is large depending on the size and location of the cavity. The dynamic response of the wall slightly differs depending on the existence of the containment liner plate. The results of this study can be applied to a full-waveform inversion approach for characterizing cavities inside a containment wall.

• (The)Study of the Eastern Classic
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• no.32
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• pp.279-310
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• 2008

In this research, the writer investigated the thought in realism and view on education appeared in the text, GUANZI("管子") roughly. The thoughts and contemplation in GUANZI mostly contain practical issues of politics, law and economy, as well as military policy and also get involved in the education pursuing an organic relationship therewith. In GUANZI, the rule of law and morality were applied to the politics in a harmonious fashion. Although the text upheld agrarian-oriented policy in connection with nation's economy, it, however, succeeded to secure the national wealth by having implemented the polices concerned with industry and commerce in an appropriate manner. In addition, he established strong military organization through political stability and by securing economic strength. In short, this is the policy in order to pursue 'a rich nation with a strong military.' Under such situation, education made a positive contribution to meet the realistic needs in order for reinforcement of politics, economy, and military. In the level of moral education that will set right the decorum and proprieties of the people, and their loyalty and integrity, vocational training that enabled the four divisions of society, that is, the official class, farmers, artisans and merchants, to carry out their given jobs successfully was highly valued in GUANZI. These are substantial efforts in order to establish the order of community by means of putting emphasis on people's morality and loyalty, and also to create the public weal through reinforcement of producing activities of each class of society. After all, the realistic thought and view on education appeared in GUANZI can be understood as an expression of strong will to accomplish national prosperity and military strength in order to overcome disturbing situations in the society in those days.

• Journal of Christian Education in Korea
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• v.64
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• pp.109-144
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• 2020

In the 21st century, Our Korean churches should be reborn and truly restored in the situation korean churches have been criticized socially and adversely affected Christian missions. In this situation, the researcher analyzed the Zeraim(Agriculture) of the Jewish scripture Talmud as an alternative to solving the problems of the Korean church. In order to achieve the purpose of this research, the background of the emergence of Talmud, the main contents of Talmud Zeraim, and the application of Talmud Zeraim's Christian education were divided and analyzed. Through the Jewish Talmud Zeraim, five possibilities of application were suggested to solve the problems of Korean churches. First, it is a Christian education for a blessed life. Second, it is a Christian education that pursues social justice, life, and integrity of creation. Third, it is Christian education for a life that appreciates God's grace. Fourth, it is a Christian education for realizing the commandments and practicing the teachings. Fifth, it is a Christian education that pursues conventional spirituality. Researchers believe that the mission and direction of Christian education without losing their identity and faith under the numerous hardships in history should be found in the faith and life of Jews who have regained their traditional spirituality centered on the law (Torah) and Talmud which are the God's words. From now on, the Korean church should boldly clear up its mistakes and move on to education that humbly accepts the sounds of social criticism and can make a fresh recovery.

• Smart Media Journal
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• v.10 no.1
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• pp.88-98
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• 2021

As blockchain technology has emerged as a security issue for IoT, technology which integrates block chain into IoT is being studied. In this paper is a research concerning token-based IoT service access control technology for data sharing, which propose a possessor focused data sharing technic by using the permissioned blockchain. To share IoT health data, a Hyperledger Fabric Network consisting of three organizations was designed to provide a way to share data by applying different access control policies centered on device owners for different services. In the proposed system, the device owner issues access control tokens with different security levels applied to the participants in the organization, and the token issue information is shared through the distributed ledger of the HFN. In IoT, it is possible to lightweight the access control processing of IoT devices by granting tokens to service requesters who request access to data. Furthmore, by sharing token issuance information among network participants using HFN, the integrity of the token is guaranteed and all network participants can trust the token. The device owners can trust that their data is being used within their authorized rights, and control the collection and use of data.

• Journal of the Korea Convergence Society
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• v.13 no.4
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• pp.233-244
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• 2022

One of the most noteworthy topics in recent corporate management is ESG(Environmental, Social, Governance). Although there are many companies that have declared ESG management, KT has declared full-fledged ESG management in 2021 and is sharing its sustainable management strategy with stakeholders. In addition, KT is strengthening ESG management by issuing ESG bonds for the first time in the domestic ICT industry. At a time when the information technology industry became more important due to COVID-19, this study attempted to examine KT's ESG management goals and strategies by dividing them into environmental, social, and governance areas. KT was aiming to achieve environmental integrity through 'environmental management', 'green competence', 'energy resources', and 'eco-friendly projects' in the environmental field. In addition, in the social field, genuine creating social value was pursued through 'social contribution', 'co-growth', and 'human rights management'. Finally, in the governance area, it was aiming for a transparent corporate management system to pursue economic reliability through 'ethics and compliance' and 'risk management'. In particular, KT was promoting its own ESG management by promoting strategies to solve environmental and social problems using AI and BigData technologies based on the characteristics of a digital platform company. This study aims to derive implications for ESG strategy establishment and ESG management development direction through KT's ESG management case in relation to ESG management, which has emerged as a hot topic.

• Journal of the Society of Disaster Information
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• v.17 no.4
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• pp.897-903
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• 2021

Purpose: Recently, ransomware damage that encrypts victim's data through hacking and demands money in exchange for releasing it is increasing domestically and internationally. Accordingly, research and development on various response technologies and solutions are in progress. Method: A secure storage area and a general storage area were created in the same virtual environment, and the sample data was saved by registering the access process. In order to check whether the stored sample data is infringed, the ransomware sample was executed and the hash function of the sample data was checked to see if it was infringed. The access control performance checked whether the sample data was accessed through the same name and storage location as the registered access process. Result: As a result of the experiment, the sample data in the secure storage area maintained data integrity from ransomware and unauthorized processes. Conclusion: Through this study, the creation of a secure storage area and the whitelist-based access control method are evaluated as suitable as a method to protect important data, and it is possible to provide a more secure computing environment through future technology scalability and convergence with existing solutions.

• Journal of the Korea institute for structural maintenance and inspection
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• v.26 no.4
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• pp.20-29
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• 2022

The operational modal analysis (OMA) technique, which extracts the modal parameters of a structural system using ambient vibrations, has been actively developed as a field of structural health monitoring of cable-supported bridges. In this paper, the short and long-term modal parameters of a cable-stayed bridge were evaluated using the acceleration data obtained from the two ambient vibration tests (AVTs) and three years of continuous measurements. A total of 27 vertical modes and 1 lateral mode in the range 0.1 ~ 2.5 Hz were extracted from the high-resolution AVTs which were conducted in the 6th and 19th years after its completion. Existing OMA methods such as Peak-Picking (PP), Eigensystem Realization Algorithm with Data Correlation (ERADC), Frequency Domain Decomposition (FDD) and Time Domain Decomposition (TDD) were applied for modal parameters extraction, and it was confirmed that there was no significant difference between the applied methods. From the correlation analysis between long-term natural frequencies and environmental factors, it was confirmed that temperature change is the dominant factor influencing natural frequency fluctuations. It was revealed that the decreased natural frequencies of the bridge were not due to changes in structural performance and integrity, but to the environmental effects caused by the temperature difference between the two AVTs. In addition, when the TDD technique is applied, the accuracy of extracted mode shapes is improved by adding a proposed algorithm that normalizes the sequence so that the autocorrelations at zero lag equal 1.

• KIPS Transactions on Computer and Communication Systems
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• v.12 no.8
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• pp.253-262
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• 2023

E-voting is a concept that includes actions such as kiosk voting at a designated place and internet voting at an unspecified place, and has emerged to alleviate the problem of consuming a lot of resources and costs when conducting offline voting. Using E-voting has many advantages over existing voting systems, such as increased efficiency in voting and ballot counting, reduced costs, increased voting rate, and reduced errors. However, centralized E-voting has not received attention in public elections and voting on corporate agendas because the results of voting cannot be trusted due to concerns about data forgery and modulation and hacking by others. In order to solve this problem, recently, by designing an E-voting system using blockchain, research has been actively conducted to supplement concepts lacking in existing E-voting, such as increasing the reliability of voting information and securing transparency. In this paper, we proposed an electronic voting system that introduced hybrid blockchain that uses public and private blockchains in convergence. A hybrid blockchain can solve the problem of slow transaction processing speed, expensive fee by using a private blockchain, and can supplement for the lack of transparency and data integrity of transactions through a public blockchain. In addition, the proposed system is implemented as BaaS to ensure the ease of type conversion and scalability of blockchain and to provide powerful computing power. BaaS is an abbreviation of Blockchain as a Service, which is one of the cloud computing technologies and means a service that provides a blockchain platform ans software through the internet. In this paper, in order to evaluate the feasibility, the proposed system and domestic and foreign electronic voting-related studies are compared and analyzed in terms of blockchain type, anonymity, verification process, smart contract, performance, and scalability.