• Title/Summary/Keyword: Protection measure

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THE DEVELOPMENT OF WEB SERVER FOR KOREAN ELECTRICAL DISTRIBUTION-SYSTEM PROTECTION (한국전력 송전 계통보호를 위한 웹 서버 개발)

  • Zhang, Li;Choi, M.S.;Lee, S.J.;Min, B.U.;Kim, S.H.;Oh, S.M.
    • Proceedings of the KIEE Conference
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    • 2003.11a
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    • pp.178-180
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    • 2003
  • Since faults often occur on power system, relay protection has become an important part to protect the equipments of power system efficiently and safely. Database can store the data about the relay protection efficiently, and these data must be shown to users through the web. Proset2000(an overall program system to protect power system) can realize this function in some measure, but it needs to be developed. This paper is about the further development of Proset2000. In this paper, web of Proset2000 is made by ASP programming technology, and users can browse and search the useful data through the web. There are some new functions, such as the summary of setting values, the message board and the management of administrator.

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Radiation protective qualities of some selected lead and bismuth salts in the wide gamma energy region

  • Sayyed, M.I.;Akman, F.;Kacal, M.R.;Kumar, A.
    • Nuclear Engineering and Technology
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    • v.51 no.3
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    • pp.860-866
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    • 2019
  • The lead element or its salts are good radiation shielding materials. However, their toxic effects are high. Due to less toxicity of bismuth salts, the radiation shielding properties of the bismuth salts have been investigated and compared to that of lead salts to establish them as a better alternative to radiation shielding material to the lead element or its salts. The transmission geometry was utilized to measure the mass attenuation coefficient (${\mu}/{\rho}$) of different salts containing lead and bismuth using a high-resolution HPGe detector and different energies (between 81 and 1333 keV) emitted from point sources of $^{133}Ba$, $^{57}Co$, $^{22}Na$, $^{54}Mn$, $^{137}Cs$, and $^{60}Co$. The experimental ${\mu}/{\rho}$ results are compared with the theoretical values obtained through WinXCOM program. The theoretical calculations are in good agreement with their experimental ones. The radiation protection efficiencies, mean free paths, effective atomic numbers and electron densities for the present compounds were determined. The bismuth fluoride ($BiF_3$) is found to have maximum radiation protection efficiency among the selected salts. The results showed that present salts are more effective for reducing the intensity of gamma photons at low energy region.

A Study on the Role and Security Enhancement of the Expert Data Processing Agency: Focusing on a Comparison of Data Brokers in Vermont (데이터처리전문기관의 역할 및 보안 강화방안 연구: 버몬트주 데이터브로커 비교를 중심으로)

  • Soo Han Kim;Hun Yeong Kwon
    • Journal of Information Technology Services
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    • v.22 no.3
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    • pp.29-47
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    • 2023
  • With the recent advancement of information and communication technologies such as artificial intelligence, big data, cloud computing, and 5G, data is being produced and digitized in unprecedented amounts. As a result, data has emerged as a critical resource for the future economy, and overseas countries have been revising laws for data protection and utilization. In Korea, the 'Data 3 Act' was revised in 2020 to introduce institutional measures that classify personal information, pseudonymized information, and anonymous information for research, statistics, and preservation of public records. Among them, it is expected to increase the added value of data by combining pseudonymized personal information, and to this end, "the Expert Data Combination Agency" and "the Expert Data Agency" (hereinafter referred to as the Expert Data Processing Agency) system were introduced. In comparison to these domestic systems, we would like to analyze similar overseas systems, and it was recently confirmed that the Vermont government in the United States enacted the first "Data Broker Act" in the United States as a measure to protect personal information held by data brokers. In this study, we aim to compare and analyze the roles and functions of the "Expert Data Processing Agency" and "Data Broker," and to identify differences in designated standards, security measures, etc., in order to present ways to contribute to the activation of the data economy and enhance information protection.

A Study on IAM-Based Personal Data Protection Techniques in BaaS (BaaS에서 IAM을 이용한 개인정보 보호 기법에 관한 연구)

  • Mi-Hui Kim;Myung-Joe Kang
    • Journal of IKEEE
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    • v.27 no.4
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    • pp.548-555
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    • 2023
  • With the advancement of the internet, the use of personal information in online interactions has increased, underscoring the significance of data protection. Breaches of personal data due to unauthorized access can result in psychological and financial damage to individuals, and may even enable wide-ranging societal attacks aimed at those associated with the victims. In response to such threats, there is active research into security measures using blockchain to safeguard personal information. This study proposes a system that uses middleware and IAM (Identity and Access Management) services to protect personal information in a BaaS (Blockchain as a Service) environment where blockchain is provided via the Internet. The middleware operates on servers where IAM roles and policies are applied, authenticates users, and performs access control to allow only legitimate users to access blockchain data existing in the cloud. Additionally, to understand the impact of the proposed personal information protection method on the system, we measure the response time according to the time taken and the number of users under three assumed scenarios, and compare the proposed method and research related to personal information protection using blockchain in terms of security characteristics such as idea, type of blockchain, authentication, and confidentiality.

An Effect of Magnetic Field on VDT Work (VDT 작업시 자기장이 인체에 미치는 영향에 관한 연구)

  • 박재희;김철중;이남식;김진호
    • Proceedings of the ESK Conference
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    • 1992.10a
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    • pp.77-83
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    • 1992
  • The effect of magnetic field on VDT work has not been clarified yet, but many studies repoerted that magnetic field could cause of the cancers. Many developed countries have set the criteria of magnetic field and produce the VDT which has lower magnetic value. The purpose of this study was to measure the intensity of magnectic field from VDT. For this purpose three experiments were performed. The first was designed to measure the intensity of magnetic field by distances(30,60,90 cm) and directions. The second was to compare the intensities between VDT and Color TV. The last was to evaluate the eye protec- tion glasses. The reults showed that the intensity of magnetic field was lowered in proportion to the distance $r^{3}$and both lateral sides of the VDT marked high values compared to the frontal and back sides. On the same distance (30 cm) color TV marked high value to the VDT. But on the normal work distance (TV: 100 cm, VDT: 30 cm) there was little difference, Eye protection glasses could not protect the magnetic field physically.

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Treasury Stock Sales and Management Rights Protection: Conflicts of Interest between an Owner-manager and Small Shareholders

  • CHO, SUNG ICK
    • KDI Journal of Economic Policy
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    • v.39 no.3
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    • pp.63-98
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    • 2017
  • This paper investigates the sales process of treasury stocks, while most previous research studies treasury stock repurchases. The sales of treasury stocks are an important measure to protect management rights only in Korea, as Korea's laws and systems allow treasury stock sales according to the board's resolution and not by the decisions made at the general shareholders' meetings. The board's resolution, which considers the owner-manager's interest on management rights, can cause damages to small shareholders. Considering (i) the economic characteristics of treasury stocks, (ii) other countries' institutions and experiences, (iii) a theoretical assessment of the possibility of small shareholder losses, and (iv) lessons from Korea's actual instances, Korea's present system should be corrected at least in the mid and long term. Even in the short-term, rules pertaining to sales enacted by the board's resolution inducing small shareholder losses should be overhauled. The autonomous discipline by various stakeholders could be an ideal measure by which to monitor ownermanager's decisions. In addition, temporary intervention measures, such as government examinations, could be implemented to protect small shareholders.

A Study on the Insulation Resistance Measurement Technique for Electrical Safety of Green Car (친환경자동차의 전기안전을 위한 절연저항 측정에 관한 연구)

  • Lee, Ki-Yeon;Kim, Dong-Ook;Kim, Hyang-Kon;Moon, Hyun-Wook
    • The Transactions of the Korean Institute of Electrical Engineers P
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    • v.58 no.4
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    • pp.597-601
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    • 2009
  • Green car such as a hybrid electrical vehicle and fuel cell vehicle is developed as a commercial target. UN/ECE/WP29 is developing GTR of HFCV and establishing the regulation and standard of electrical safety by ELSA. The regulation and standard about Electrical safety of vehicle are prescribed in ISO, UN/ECE, FMVSS, Japanese Attachment and so on, in case of insulation resistance is referred to keep more than 100/Vdc, 500/Vac. However, accurate method to measure insulation resistance agreeable to structure of vehicle does not exist now, it is actually that correctness of measurement drops according to the feature of battery and fuel cell stack. In this paper, the method to measure insulation resistance for protection against electrical shock by direct contact or indirect contact in Green Car will be indicated by making a comparison between the insulation measurement in standard of electrical safety and the experiment results for HEV and HFCV.

A Case Study on the Investment Contract in China (중국에서 내국인 간의 투자계약 관련 중재 사례 검토)

  • Jang, Kyung-Chan
    • Journal of Arbitration Studies
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    • v.24 no.2
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    • pp.183-197
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    • 2014
  • 1. This study focuses on recent developments of trade transaction between Korea and China. The volume of trade is most rapidly increasing. There have been many items considered to ensure the proper, impartial, and rapid settlement of disputes in private laws by international arbitration. The article contains recent tendencies and proceedings of cases including place of arbitration, language, and so on. 2. The contract made between parties has led to some interpretational, legal questions. Interpretational questions rise mainly from differences of legal systems and legal questions on applying law. The characteristic features of the contract have different meanings, so some articles of the contract can be construed unlawful as a result. 3. As regards the Arbitration Act of Korea, Article 10, the Arbitration Agreement and Interim Measures by Court stipulate the following: A party to an arbitration agreement may request from a court art interim a measure of protection before or during arbitral proceedings. This article examines the application of Article 10 of the Arbitration Act of Korea.

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Measurement of the Torque for Driving Cam Shaft in Real Engine Environments (실 엔진 상태 캠 구동 토크 측정)

  • Kang, Seung-Pyo;Kauh, S.Ken;Ha, Kyoung-Pyo
    • Transactions of the Korean Society of Mechanical Engineers B
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    • v.31 no.3 s.258
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    • pp.242-247
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    • 2007
  • Energy savings and environmental protection policies have been the general trend in the engine design. The friction power loss associated with the cam mechanism has become important. But it is difficult to measure the torque of rotating valvetrain in real engine environment because most of conventional torque meters are axial type. The objective of this paper is to develop new equipment which can be installed in a rotating camshaft. It uses strain gages to measure the elastic deformation of torque sensor which replaces the cam sprocket. It includes telemetry to transmit torque data via Bluetooth and induction power system to provide adequate power to rotating torque meter. The developed torque meter has good linearity and thermostability. It was installed in a real engine, and successfully measured the valvetrain torque.

The Problems of US Import Prohibition of the IUU Fishing Products and its Implication (미국 IUU 수산물 수입통제제도의 문제점과 시사점)

  • Park, Min Gyu
    • Ocean policy research
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    • v.33 no.2
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    • pp.1-23
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    • 2018
  • The import control provision of US MSA (Magnuson-Stevens Fishery Conservation and Management Act) IUU fishing is similar to that of MMPA (The Marine Mammal Protection Act of 1972 as Amended) which caused US-Tuna(1991) case. This paper examines whether MSA's import control provision can be found to be inconsistent with WTO agreement. There is no doubt that MSA violates the Article XI:1 of the GATT 1994. The only remaining issue is whether US IUU fishing product measure is justified by the Article XX(g) and its Chapeau. However, Article XX(g) provides for a limited and conditional exception from obligations under other provisions. This paper concludes that the US MSA measure can not be justified under Article XX.