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A study on vulnerability analysis and incident response methodology based on the penetration test of the power plant's main control systems (발전소 주제어시스템 모의해킹을 통한 취약점 분석 및 침해사고 대응기법 연구)

  • Ko, Ho-Jun;Kim, Huy-Kang
    • Journal of the Korea Institute of Information Security & Cryptology
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    • v.24 no.2
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    • pp.295-310
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    • 2014
  • DCS (Distributed Control System), the main control system of power plants, is an automated system for enhancing operational efficiency by monitoring, tuning and real-time operation. DCS is becoming more intelligent and open systems as Information technology are evolving. In addition, there are a large amount of investment to enable proactive facility management, maintenance and risk management through the predictive diagnostics. However, new upcoming weaponized malware, such as Stuxnet designed for disrupting industrial control system(ICS), become new threat to the main control system of the power plant. Even though these systems are not connected with any other outside network. The main control systems used in the power plant usually have been used for more than 10 years. Also, this system requires the extremely high availability (rapid recovery and low failure frequency). Therefore, installing updates including security patches is not easy. Even more, in some cases, installing security updates can break the warranty by the vendor's policy. If DCS is exposed a potential vulnerability, serious concerns are to be expected. In this paper, we conduct the penetration test by using NESSUS, a general-purpose vulnerability scanner under the simulated environment configured with the Ovation version 1.5. From this result, we suggest a log analysis method to detect the security infringement and react the incident effectively.

The circuit design to be power transmission or power distribution using the dual characteristic impedance transmission line (이중 특성 임피던스 전송 선로를 이용한 전력 전송 또는 전력 분배가 가능한 회로 설계)

  • Park, Unghee
    • Journal of the Korea Institute of Information and Communication Engineering
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    • v.18 no.10
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    • pp.2339-2344
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    • 2014
  • of a microstrip transmission line, this transmission line can operate as the microstrip line or the coplanar line according to open or short connection between the ungrounded copper plane and grounded plane on the base plane. Two different type operation of the transmission line means that one transmission line can have two different characteristic impedances. This paper proposes and fabricates the circuit to be operated 2-ports power transmission line or 2-way power divider with the stable input matching characteristic by using this dual-impedance transmission line. The proposed circuit operates 2-ports power transmission line in case of the coplanar line or 2-way power divider line in case of the microstrip line. The fabricated circuit shows $S_{21}$ > -0.2 dB and $S_{11}$ < -15 dB above 700 MHz when the circuit operates 2-ports power transmission line. And, it is $S_{21}$ > -3.8 dB, $S_{11}$ < -10 dB and $S_{21}/S_{31}$ < ${\pm}0.3dB$ above 700 MHz when the circuit operates 2-way power divider.

PreSPI: Protein-Protein Interaction Prediction Service System (PreSPI: 단백질 상호작용 예측 서비스 시스템)

  • Han Dong-Soo;Kim Hong-Soog;Jang Woo-Hyuk;Lee Sung-Doke
    • Journal of KIISE:Computing Practices and Letters
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    • v.11 no.6
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    • pp.503-513
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    • 2005
  • With the recognition of the importance of computational approach for protein-protein interaction prediction, many techniques have been developed to computationally predict protein-protein interactions. However, few techniques are actually implemented and announced in service form for general users to readily access and use the techniques. In this paper, we design and implement a protein interaction prediction service system based on the domain combination based protein-protein interaction prediction technique, which is known to show superior accuracy to other conventional computational protein-protein interaction prediction methods. In the prediction accuracy test of the method, high sensitivity($77\%$) and specificity($95\%$) are achieved for test protein pairs containing common domains with teaming sets of proteins in a Yeast. The stability of the method is also manifested through the testing over DIP CORE, HMS-PCI, and TAP data. Performance, openness and flexibility are the major design goals and they are achieved by adopting parallel execution techniques, web Services standards, and layered architecture respectively. In this paper, several representative user interfaces of the system are also introduced with comprehensive usage guides.

Theater Reservation System Using SVG(Scalable Vector Graphics) (SVG(Scalable Vector Graphics)를 활용한 극장 예약 시스템)

  • Jeon, Tae-Ryong;An, Seong-Ok
    • The Journal of Engineering Research
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    • v.5 no.1
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    • pp.17-35
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    • 2004
  • Svg(Scalable Vector Graphics) is xml graphic standard recommended by E3C as a language based on xml to express two-dimension graphic. Svg can accommodate all Xml's patency and advantage of interoperability, and can used as various web applications being combined with other xml language. In addition, Svg can be applied to the fields of electronic commerce, geographical information, computer education and advertisement because it can produce high quality of dynamic from real-time data. SVG's application can be enhanced by linking with database. In this paper, we discuss how Svg can be utilized in theater reservation system, not just explaining svg's meaning or ability. Svg added graphic advantage in addition to xml's advantage. This means that svg retains not only graphic element but also xml's softness. It becomes easier to designate seats and add them. Current reservation system provided in general only information on time and price for a ticket, but the system using SVG in this paper provides additional information on position, price, cancellation and purchase availability of seat.

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Design and Implementation of a Protocol for Interworking Open Web Application Store (개방형 웹 애플리케이션 스토어 연동을 위한 프로토콜의 설계 및 구현)

  • Baek, Jihun;Kim, Jihun;Nam, Yongwoo;Lee, HyungUk;Park, Sangwon;Jeon, Jonghong;Lee, Seungyoon
    • KIPS Transactions on Software and Data Engineering
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    • v.2 no.10
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    • pp.669-678
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    • 2013
  • Recently, because the portable devices became popular, it is easily to see that each person carries more than just one portable device and the use of the smartphone stretches as time goes by. After the smartphone has propagated rapidly, the total usage of the smartphone applications has also increased. But still, each application store has a different platform to develop and to apply an application. The application store is divided into two big markets, the Android and the Apple. So the developers have to develop their application by using these two different platforms. Developing into two different platforms almost makes a double development cost. And for the other platforms, the weakness is, which still have a small market breadth like Bada is not about the cost, but about drawing the proper developers for the given platform application development. The web application is rising up as the solution to solve these problems, reducing the cost and time in developing applications for every platform. For web applications don't need to make a vassal relationship with application markets platform. Which makes it possible for an application to operate properly in every portable devices and reduces the time and cost in developing. Therefore, all of the application markets could be united into one big market through a protocol which will connect each web applications market. But, still there is no standard for the web application store and no current web application store is possible to interlock with other web application stores. In this paper, we are trying to suggest a protocol by developing a prototype and prove that this protocol can supplement the current weakness.

Analysis of Factors Affecting Big Data Use Intention of Korean Companies : Based on public data availability (국내기업의 빅데이터 이용의도에 미치는 영향요인 분석 : 공공데이터 활용여부를 기준으로)

  • Jeong, HwaMin;Lee, SangYun
    • Journal of the Korea Academia-Industrial cooperation Society
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    • v.20 no.10
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    • pp.478-485
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    • 2019
  • This is an exploratory study to examine factors affecting South Korean companies' intentions to use big data technology and services based on whether the companies use public data or not. This study, using R, conducted chi-squared tests and logistic regression analysis. As a result of the logistic regression analysis, cost reduction had a positive effect on the big data-use intentions in companies that use public data, whereas with companies that do not use public data, customer satisfaction had a positive impact, and support for decision-making had a negative impact on the intention to use big data. Recently, the South Korean government has focused on improving the utilization of public data and big data. However, as a result of this study, the use of public data and big data in South Korea is still insufficient. Yet, considering that the data utilized for this study was created in 2017, additional study using public data and big data is also required.

A Study on the Improvement Measures for the Management and Utilization of Korea's Fiscal Government Data: Focusing on Fiscal Data Governance (재정데이터의 관리 및 활용을 위한 개선방안 연구: 재정데이터 거버넌스를 중심으로)

  • Song, Seok-Hyun
    • Informatization Policy
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    • v.28 no.3
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    • pp.95-111
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    • 2021
  • To achieve a data-driven policy decision-making system, the Ministry of Strategy and Finance has formed a marketing team and is actively building upon it. This system, currently under construction, will enable data-driven financial tasks beyond simple financial administration. The U.S. has already enacted The Foundations for Evidence-Based Policymaking Act in the process of similar pursuits. Since last year, the data-driven system administrative law has been enacted in Korea, and a legal framework has been established for data-driven administrative work. The next-generation budget accounting system to fulfill its role as a data-driven system needs public policy support to operate. Innovation and transformation are needed in various areas such as data management, legal system, and installation of related systems. Accordingly, it is very timely to analyze the financial systems and policies of advanced countries such as the U.S. and U.K., which already have established and operates such a financial system. By benchmarking and applying existing financial information systems to the next-generation budget accounting system, a better system will result. In this study, major developed countries, including the U.S., U.K., France, and Canada were benchmarked and analyzed in terms of the main elements of data governance: public policy, systems, legal framework, promotion system, and service level. It was discovered that the role and direction of the national fiscal policy system that the people favor should be able to respond quickly to the recent difficult economic crisis environment such as the digital transformation trend and COVID-19.

A Validation Study on Scale of Determinants for Korean Traditional Music Performances (국악공연의 관람 결정요인 척도 타당화)

  • Jeon, Juhee;Chang, Inhee;Choi, Baesuk
    • The Journal of the Korea Contents Association
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    • v.19 no.8
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    • pp.265-275
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    • 2019
  • The purpose of this study is to validate scale of deteminants for watching Korean traditional music performances to activate the market by procuring and increasing Korean traditional music performance consumers that exhibit generally low preference in the performance market. Accordingly, FGI was conducted on seven employees and professionals in the arts and cultural sector and then open survey results were categorized into eight factors and a total of sixty-five items using the KJ method to find the viewing decision factors per consumer type of Korean traditional music performances. Afterwards, a six-factor and thirty-five items were extracted after conducting an exploratory factor analysis and confirmatory factor analysis was conducted to verify the structural appropriateness, and then the feasibility of the composition of Korean traditional music performance viewing decision factor scale was verified. Results of the analysis showed that first, for general Korean adults making decisions to view Korean traditional music performances, there was positive impact in the order of interest-creating factors, fame and talent factors, emotional and information factors, creativity factors, reasonable price factors, and social relation factors. Second, the general tendency of decision factors to view Korean traditional music performances showed relatively high levels in reasonable price factors and interest-creating factors among the Korean traditional music performance viewing decision factors, while emotional and information factors were found to be relatively low.

Adolescents' Self-control and Big Five Personality Types Affecting Maladaptive and Adaptive Computer Game Use State (청소년의 Big Five 성격 유형과 자기 조절 성향이 게임 과용, 선용 행태에 미치는 영향)

  • Kim, YoungBerm;Lee, SangHo
    • Journal of Korea Society of Industrial Information Systems
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    • v.24 no.4
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    • pp.65-77
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    • 2019
  • Adolescents reach the game-use states of adaptive and maladaptive by the absorption to computer game. Authors claimed that the two states are commonly related with the time of game-use, and the degree of them are distinctive according to adolescent individuals, specifically their self-control propensity. Authors proposed a conceptual research model that Big Five personality types predict their self-control which moderates the relationships from game use-time to the maladaptive and adaptive states. The data to test its validity and reliability had been sampled 999 Korean students in elementary school, middle school, and high school. Resultingly, the openness and conscientiousness of the adolescents affected positively on the self-control, which moderated negatively the relationship from the game use time to the maladaptive use state, but the positive moderation on the relationships from game use time to adpative state was not significant. These results mean that we could apply teenager's Big Five personality type and their self-control traits as a tool for preventing teens from the overuse state like addiction.

Occupational Therapist Needs Survey for the Development of a Sensory Processing Evaluation Tool for Schools (학교용 감각처리 평가도구 개발을 위한 작업치료사 욕구 조사)

  • Cho, Sun Young;Yoo, Eun-Young
    • Therapeutic Science for Rehabilitation
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    • v.8 no.2
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    • pp.31-41
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    • 2019
  • Objective: The purpose of this study is to investigate existing evaluation methods and the limitations thereof Korean children's occupational therapists to understand sensory processing performance in schools. This study provides basic data for the development of sensory processing evaluation tools for schools. Methods: The questionnaire was administered to 20 occupational therapists with more than 3 years of experience in occupational therapy interventions for school-aged children. The survey obtained information through online surveys and telephone interviews. The questionnaires were divided into general characteristics and evaluation methods and limitations of existing sensory processing in school, necessity of a sensory processing evaluation tool for school, and opinions. The questionnaire consisted of 12 closed questions and 4 open questions. Results: In total, 90% of the researchers said that school-aged children in schools are aware of 'some information' through their parents or children. Furthermore, 50% said they often complained about difficulties related to sensory processing in school, and 50% that they were more than 'usual'. Finally, 80% of the repondents indicated that the development of sensory processing evaluation tools for schools was "significantly needed". Conclusion: Occupational therapists in charge of domestic children reported for the need to develop evaluation tools to understand sensory processing abilities in schools. Evaluation tools will play an important role in the evaluation and intervention of occupational therapy for school-aged children.