• 한국정보과학회논문지:시스템및이론
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• 제36권1호
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• pp.33-39
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• 2009

본 논문은 Advanced Encryption Standard(AES) 암호화 코아가 내장된 System-on-a-Chip(SoC)의 스캔 기반 사이드 채널 공격에 의해 발생될 수 있는 비밀 키 정보 누출 방지를 위한 효과적인 시큐어 스캔 기술을 제안한다. 본 논문에서 제안하는 시큐어 스캔 설계 기술은 어플리케이션에 최적화 되어있는 암호화 코아를 수정하지 않고 적용을 할 수 있다. 또한 SoC 상의 IEEE1149.1 제어기 표준을 유지하며 기존 방식보다 적은 면적 오버 헤드와 전력 소모 및 높은 고장 검출율을 갖는 기술을 제안한다.

• 대한전자공학회논문지SD
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• 제47권2호
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• pp.77-86
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• 2010

본 논문은 Advanced Encryption Standard(AES) 암호화 코아가 내장된 System-on-a-Chip(SoC)의 스캔 기반 사이드 채널 공격에 의해 발생될 수 있는 비밀 키 정보 누출 방지를 위한 효과적인 스캔 설계 기술을 제안한다. 본 논문에서 제안하는 시큐어 스캔 설계 기술은 IEEE 1149.1의 명령어 방식을 사용하여 거짓 키를 이용한 테스트를 진행한다. 또한 어플리케이션에 최적화 되어있는 암호화 IP 코아를 수정하지 않고 적용을 할 수 있다. SoC상의 IEEE 1149.1 제어기 표준을 유지하며 기존 방식에 비해 낮은 면적오버헤드 및 전력 소모량을 갖는 기술을 제안한다.

• International Journal of Fuzzy Logic and Intelligent Systems
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• 제8권1호
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• pp.68-74
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• 2008

In this paper, a novel neural fuzzy control method is proposed to control nonlinear systems. A standard PD-like fuzzy controller is designed and used as a main controller for the system. Then a neural network controller is added to the reference trajectories to form a neural-fuzzy control structure and used to compensate for nonlinear effects. Two neural-fuzzy control schemes based on two well-known neural network control schemes, the feedback error learning scheme and the reference compensation technique scheme as well as the standard PD-like fuzzy control are studied. Those schemes are tested to control the angle and the position of the inverted pendulum and their performances are compared.

• 한국신재생에너지학회:학술대회논문집
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• 한국신재생에너지학회 2009년도 춘계학술대회 논문집
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• pp.739-743
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• 2009

Japan is leading standards for the hydrogen fuel quality on the PEMFC(Proton Exchange Membrane Fuel Cell) vehicle at ISO/TC197/WG12. However, it has many problems to solve the standard of measurement and the test method. because the standard of measurement which was proposed in Japan is too high to reach the technique for many countries. it might not control standards for the hydrogen fuel quality on the PEMFC vehicle in Korea. So we need to develop the study of standards and the technique of measurement continuously for the International Standards Meeting.

• 한국건설관리학회:학술대회논문집
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• 한국건설관리학회 2006년도 정기학술발표대회 논문집
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• pp.659-662
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• 2006

플랜트 산업은 2004년도 기준 해외 건설 수주액의 70%를 차지하는 매우 중요한 산업이다. 플랜트 산업의 기술력은 일부 시설관련 상세설계와 시공부문의 경쟁력을 확보한 상태이다. 그러나 플랜트 산업 가운데 고부가가치 창출이 가능한 기획, 기본설계 기술이 미흡하여 기술력 향상이 필요하다. 따라서 고부가가치 창출이 가능한 기획, 기본설계 기술 경쟁력을 향상시키기 위하여 플랜트 설계를 위한 표준코드의 문제점 및 개선방향을 제시하고자 한다.

• 지역사회간호학회지
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• 제17권4호
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• pp.573-582
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• 2006

Purpose: To find out whether the self-care ability measurement used for visiting health care provide an appropriate standard to select service methods using a Delphi survey and to offer basic data that can improve the measurement. Method: A Delphi survey was done with 39 people consisting of theoretical professionals, field managers, and practitioners engaged in visiting health care. Result: It was found that items and weighted points in the currently used self-care ability measurement needed adjustment. Therefore, a modified evaluation standard was presented by domains, items and detailed items. Finally, the self-care ability measurement is composed of 4 domains, 11 items and 19 detailed items. Conclusion: This study is significant in that it presented an evaluation standard applicable directly to business practice by supplementing problems in the existing self-care ability measurement. This study suggests the need to develop various measurements for elderly households based on community.

• 산업경영시스템학회지
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• 제11권18호
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• pp.41-57
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• 1988

This study was carried out to furnish information for the appropriate standard work time measure and applicate system development that help for korean manufacturers. As a research methodology of the study, the questionnaire survey by sampling nine hundreds registerd corporation, was conducted to find the scientific management technique level (for especially standard work time). By crossectionally analyzing the survey results, placed primary emphasis on the study to comparison with employee scale and types of industry classify. The contents of subjective study art as follows; (1) Establish state of standard time(S. T) (2) Mainly technique for establish S. T (3) Institute level and correctness of S. T (4) Practical use of S. T (5) Performance rating and Allowance rate (6) Advantage and disadvantage to application results.

• Progress in Superconductivity
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• 제14권1호
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• pp.1-10
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• 2012

We fabricated a closed coils by using resistive-joint method and the joint resistance of the coils were estimated by field decay technique in liquid nitrogen. We used the Runge-kutta method for the numerical analysis to calculate the decay properties. The closed coil was wound by $(Bi,Pb)_2Sr_2Ca_2Cu_3O_x$/Ag tape. Both ends the tape were overlapped and soldered to each other. The current was induced in a closed coils by external magnetic flux density. Its decay characteristic was observed by means of measuring the magnetic flux density generated by induced current at the center of the closed coil with hall sensor. The joint resistance was calculated as the ratio of the inductance of the loop to the time constants. The joint resistances were evaluated as a function of critical current of loop, contact length, sweep time, and external magnetic flux density in a contact length of 7 cm. It was observed that joint resistance was dependent on contact length of a closed coil, but independent of critical current, sweep time, and external magnetic flux density. The joint resistance was measured to be higher for a standard four-probe method, compared with that for the field decay technique. This implies that noise of measurement in a standard four-probe method is larger than that of field decay technique. It was estimated that joint resistance was $8.0{\times}10^{-9}{\Omega}$ to $11.4{\times}10^{-9}{\Omega}$ for coils of contact length for 7 cm. It was found that 40Pb/60Sn solder are unsuitable for persistent mode.

• 말소리와 음성과학
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• 제2권3호
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• pp.127-134
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• 2010

Additive noise and channel mismatch strongly degrade the performance of speaker verification systems, as they distort the features of speech. In this paper a histogram transformation technique is presented to improve the robustness of text-independent speaker verification systems. The technique transforms the features extracted from speech such that their histogram is conformed to a reference distribution. The effect of different standard deviations for the reference distribution is investigated. Experimental results indicate that, in channel mismatched environments, the proposed technique offers significant improvements over existing techniques. We also verify performance improvement of the proposed method using statistics.

• 전기학회논문지P
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• 제57권3호
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• pp.291-295
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• 2008

We have developed an evaluation technique for ratio errors of current transformer (CT) comparator by using the precise standard capacitors. By applying this technique for equivalent circuit of CT comparator evaluation system, we can obtain the calculated and measured ratio errors in the CT comparator. Thus we can evaluate ratio errors of CT comparator by comparing the calculated and measured ratio errors. Because this method requires only the standard capacitors, it is simple and easy method to reliability and accuracy maintenance of CT comparator. The method was applied to CT comparator under test with the ratio error ranges of $0{\sim}{\pm}10%$. The ratio error of the CT comparator under test theoretically obtained in this method are consistent with that measured for same CT comparator under test by using wide ratio error CT within an estimated expanded uncertainty (k = 2) in the overall ratio error ranges.