• Proceedings of the Korean Society of Plant Pathology Conference
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• 2000.10a
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• pp.29.2-29
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• 2000

• Broadcasting and Media Magazine
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• v.5 no.3
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• pp.4-13
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• 2000

지식 정보사회로의 발전에 따라 부수적으로 발생하는 정보의 불법도청, 악용, 개조 등 역기능에 대비하기 위한 암호기술의 필요성이 증대하고 있다. 본고에서는 암호 기법에서 가장 널리 이용되는 기밀성 확보를 위한 비밀키 암호로 DES를 비롯한 AES의 추진 현황을 소개하고, 인증성을 확보하는 공개키 암호의 대표적인 알고리즘 DH, RSA 등을 소개하고 새로운 공개키 암호 방식에 대하여 기술한다. 미국의 AES 추진 계획에 자극을 받은 유럽 및 일본은 자국의 암호 산업 보호 및 전자 정부 구축을 위한 암호 방식의 공모 계획을 최근 수립하였는데 그 내용을 소개하고 암호기술의 향후 발전 전망을 제시하였다.

• 한국정보디스플레이학회:학술대회논문집
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• 2000.01a
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• pp.105-106
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• 2000

The positive slope of the current-voltage characteristic at pressure up to 850 torr was obtained using the closed microhollow cathode without the individual and/or distributed ballast. This indicates that the stable parallel operation of the discharge was also achieved using the closed microhollow cathode. The parallel operation makes it possible to manufacture de plasma displays with high pressure, small discharge current, and long lifetime.

• Proceedings of the Korean Information Science Society Conference
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• 2000.10c
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• pp.405-407
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• 2000

인터넷과 전자상거래 등이 보편화됨에 따라 다수의 사용자 요구를 동시에 효율적으로 처리하며, 다양한 클라이언트/서버 요청을 신속하게 처리할 수 있는 다계층 구조의 분산처리 플랫폼에 대한 연구가 여러 연구 그룹에서 수행되고 있다. 이러한 연구 중의 하나가 자바를 이용한 Enterprise JavaBeans(EJB)[1]이다. EJB는 de facto 표준으로 규격화되어 있다. 본 논문에서는 EJB 컨테이너의 리소스 풀링(Resource Pooling) 서비스에 우선순위 기능을 적용하여 그 성능을 개선하는 방법을 제시한다. 우선순위 처리 기능을 갖는 리소스 풀링 서비스를 설계하고 시뮬레이션을 통하여 성능을 분석한다.

• Bulletin of the Korean Mathematical Society
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• v.37 no.1
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• pp.77-84
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• 2000

The product of two localization operators with symbols F and G in some subspace of $L^2(C^n)$ is shown to be a localization operator with symbol in $L^2(C^n)$ and a formula for the symbol of the product in terms of F and G is given.

• Proceedings of the Korean Magnestics Society Conference
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• 2000.09a
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• pp.393-394
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• 2000

The magnetic alloy of $Nd_{2}Fe_{14}B$-type was synthesized by a mechano-chemical method, including the processes of spray-drying, de-binding, milling, $H_{2}$- and Ca-reduction and washing. The very fine $Nd_{2}Fe_{14}B$ particles smaller than $1\mu\textrm{m}$ could be achieved without the inevitable pulverization step in conventional processes.

• Structural Engineering and Mechanics
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• v.10 no.5
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• pp.427-440
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• 2000

The formulas for the perturbation analysis with modes of close eigenvalues are derived in this paper. Emphasis is made on the consistency of the straightforward perturbation process, given the complete terms of perturbations in the zeroth-order, which is a form of Rayleigh quotient, and in the higher-orders. By dividing the perturbation of eigenvector into two parts, the first-order perturbation with respect to the modes of close eigenvalues is moved into the zeroth-order perturbation. The normality condition is employed to compute the higher-order perturbations of eigenvector. The algorithm can be condensed to a single mode with a distinct eigenvalue, and this can accelerate the convergence of the perturbation analysis. The example confirms that the perturbation approximation obtained from the suggested procedure is in a good accuracy on the eigenvalues, eigenvectors, and normality.

• Wind and Structures
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• v.3 no.4
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• pp.221-241
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• 2000

Structural dynamics usually applies modal transformation rules aimed at de-coupling and/or minimizing the equations of motion. Proper orthogonal decomposition provides mathematical and conceptual tools to define suitable transformed spaces where a multi-variate and/or multi-dimensional random process is represented as a linear combination of one-variate and one-dimensional uncorrelated processes. Double modal transformation is the joint application of modal analysis and proper orthogonal decomposition applied to the loading process. By adopting this method the structural response is expressed as a double series expansion in which structural and loading mode contributions are superimposed. The simultaneous use of the structural modal truncation, the loading modal truncation and the cross-modal orthogonality property leads to efficient solutions that take into account only a few structural and loading modes. In addition the physical mechanisms of the dynamic response are clarified and interpreted.

• Asian Pacific Journal of Cancer Prevention
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• v.15 no.23
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• pp.10313-10317
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• 2015

Background: The purpose of the article was to analyze the years of potential life lost (YPLL) of women who died from breast and cervical cancer in the State of Paran$\acute{a}$, Southern Brazil. This was a temporal trend study (2000 to 2010) about the coefficients of mortality and the years of potential life lost in women aged 20 to 70 years. Materials and Methods: Data were obtained through the database of the Department of the Unified Health System (DATASUS) and the National Mortality Information System. Results: There was a loss of 125.075 YPLL due to breast cancer, with an average of 11.370 YPLL. Regarding cervical cancer, the figure obtained was 91.625 YPLL from 2000 to 2010, with an average of 8.329 YPLL. Increased risk of death from breast cancer was observed for women aged 50 to 59 years, with a significant increase among those in the age group from 40 to 49 years. There was an increased rate of cervical cancer among women 40 to 69 years. Conclusions: The risk of death grows with increasing age, being higher from 40 years. Prevention is paramount for both cancers. Thus, preventive measures are required and a reassessment of political strategies should be adopted.

• Structural Engineering and Mechanics
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• v.9 no.3
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• pp.241-256
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• 2000

The major sources of energy dissipation in steel frames with partially restrained (PR) connections are evaluated. Available experimental results are used to verify the mathematical model used in this study. The verified model is then used to quantify the energy dissipation in PR connections due to hysteretic behavior, due to viscous damping and at plastic hinges if they are formed. Observations are made for two load conditions: a sinusoidal load applied at the top of the frame, and a sinusoidal ground acceleration applied at the base of the frame representing a seismic loading condition. This analytical study confirms the general behavior, observed during experimental investigations, that PR connections reduce the overall stiffness of frames, but add a major source of energy dissipation. As the connections become stiffer, the contribution of PR connections in dissipating energy becomes less significant. A connection with a T ratio (representing its stiffness) of at least 0.9 should not be considered as fully restrained as is commonly assumed, since the energy dissipation characteristics are different. The flexibility of PR connections alters the fundamental frequency of the frame. Depending on the situation, it may bring the frame closer to or further from the resonance condition. If the frame approaches the resonance condition, the effect of damping is expected to be very important. However, if the frame moves away from the resonance condition, the energy dissipation at the PR connections is expected to be significant with an increase in the deformation of the frame, particularly for low damping values. For low damping values, the dissipation of energy at plastic hinges is comparable to that due to viscous damping, and increases as the frame approaches failure. For the range of parameters considered in this study, the energy dissipations at the PR connections and at the plastic hinges are of the same order of magnitude. The study quantitatively confirms the general observations made in experimental investigations for steel frames with PR connections; however, proper consideration of the stiffness of PR connections and other dynamic properties is essential in predicting the dynamic behavior.