• Steel and Composite Structures
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• 제28권5호
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• pp.517-525
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• 2018

The specimens made by Z2CND18.12N austenitic stainless steel were conducted on a 100 kN closed loop servo hydraulic tension-compression testing machine with a digital controller. Uniaxial tension and uniaxial ratcheting effect tests were carried out at $25^{\circ}C$. Moreover, Uniaxial tension tests were conducted at $150^{\circ}C$, $250^{\circ}C$ and $350^{\circ}C$. Based on these experimental data, the prediction models of stress-strain curve and the relationship of ratcheting strain and number of cycles were established by the algorithm principle of BP neural network. The results indicated that the predicted results of neural network model were in well agreement with experimental data. It was found that the BP neural network model had high validity and accuracy.

• 한국실내디자인학회논문집
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• 제21권6호
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• pp.147-157
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• 2012

This paper aims to examine the fundamental relationship of what principles cause the aesthetic shapes in Korean sarangbang furniture of the $19^{th}$ century. Focusing on the Greimas' isotopic and semantic structure analysis, this research analyzed the traditional Korean men's furniture in four steps; signifier analysis, isotopic analysis, semantic structure analysis, and comprehensive interpretation. The results show that the expressive qualities of sarangbang furniture included visual symmetric aesthetics, and the hues of natural materials with dark tones. The manufacturing process emphasized the characteristics of natural materials; while diversity was respected in decorations, function as restrained form was also important with a concise image. Through these characteristics, sarangbang furniture revealed a balance, a harmony of contrastive elements, and a restrained aesthetics. Within these qualities, it was seen that aesthetic principles, such as "severance and communication," "artifice and nature," "restraint and manifestation," "toughness and softness," "filling and emptying" and "decoration and utility" were in a mutually supplementary relationship. At the basis of this aesthetic thought appears to be Confucianism, which had been the model for seonbi politics and scholarship.

• Journal of Veterinary Science
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• 제24권6호
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• pp.75.1-75.8
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• 2023

Background: In veterinary medicine, previous studies regarding the diagnostic performance of shear wave elastography (SWE) in chronic kidney disease (CKD) are not consistent with each other. Moreover, there has been no study evaluating the relationship between symmetric dimethylarginine (SDMA) concentration and renal shear wave velocity (SWV) using two-dimensional SWE (2D SWE) in dogs with CKD. Objectives: This study aimed to evaluate the diagnostic capability of 2D SWE in dogs with CKD and to assess the relationship between renal SWV and SDMA concentration. Methods: Dogs with healthy kidneys and dogs with CKD underwent 2D SWE and SDMA assay. Renal stiffness was estimated as renal SWV in m/s. Results: SDMA concentration had a weak positive correlation with the left (r = 0.338, p = 0.022) and right renal SWV (r = 0.337, p = 0.044). Renal SWV was not significantly different between healthy kidney and CKD groups in the left (p = 0.085) and right (p = 0.171) kidneys. Conclusions: 2D SWE may could not distinguish between dogs with healthy kidney and dogs with early stage of CKD, but it would be useful for assessing the serial change of renal function in dogs.

• 정보보호학회논문지
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• 제22권3호
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• pp.505-514
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• 2012

싸이월드, 페이스북과 같은 소셜 네트워킹 서비스는 개인적인 데이터를 지인들과 공유하는데 매우 유용하다. 이들은 대부분 중앙 집중형 서버를 기반으로 하는데, 이 같은 시스템은 사용자들의 모든 통신 내역이 서버에게 노출된다는 단점을 가진다. 이러한 문제점을 개선하기 위해서 p2p 시스템에 착안한 분산된 소셜 네트워킹 서비스와 그 안에서 타인의 데이터에 접근하는 것을 제어하는 연구가 진행 중이다. 기존의 접근제어 기법에서는 신뢰하는 제 3기관이 필요하거나 프로토콜에 참여하는 모든 사용자들이 온라인 상태여야 하고, 사용자들이 분산된 방식으로 구축한 소셜 네트워크가 서버에게 노출되는 단점이 존재했다. M. Atallah 등은 처음으로 암호학적인 키 관리 기법을 활용해서 기존의 기법들이 지닌 문제점을 모두 해결했지만, 제안된 기법이 매우 비효율적이라는 한계가 있었다. 본 논문에서는 이 기법이 가진 비효율을 분석하고, 키 관리 기법이 아닌 대칭키 기반의 환형(circular) 암호를 최초로 적용하여 효율적인 접근제어 기법을 제안한다. 제안하는 기법은 온라인 상에 구축된 소셜 네트워크를 통해서 사용자 데이터에 대한 접근을 분산된 방식으로 제어하고, 서버가 그 네트워크를 추론할 수 없도록 기존의 기법보다 향상된 효율성과 안전성을 제공한다.

• 한국해양학회지
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• 제29권3호
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• pp.287-295
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• 1994

1993년 4월 동해 남서해역에 발생한 난수성 소용돌이의 수온구조와 ADCP (Acoustical Doppler Current Profiler)의 음향자료를 이용하여 계산된 후방산란 강도 구조의 상관관계를 연구하였다. 후방산란 강도 계산 결과, 난수성 소용돌이 중심부와 1$0^{\circ}C$의 등온선 부근에서 산란체의 의한 산랑강도가 크게 나타나고 있다. 수온 구조와 의 비교시 남북단면의 경우 산란강도 구조는 수온 구조와 일치하는 모양을 보이고 있 으나, 동서단면의 경우 산란강도가 연안쪽에서 크게 나타나는 비대칭 구조를 보이고 있어 수온구조와 일치하지 않고 있다. 이같은 비대칭 현상은 동한난류의 유입축인 연 안쪽에서 해류와 산란체로 작용하는 부유생물(주로 동물성 플랑크톤)이 함께 이동하여 산란체의 양적 분포가 크기 때문이라 설명할 수 있다. 또한 같은 해 8월 관측된 CREAMS '93(Circulation Research of the East Asian Marginal Sea)의 ADCP 자료 분석 결과는 산란강도와 수온구조가 유사하게 나타나고 있다.

• Agribusiness and Information Management
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• 제5권1호
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• pp.42-54
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• 2013

Information System (IS) Success Model proposed by DeLone and McLean is applied as a successful operation tool of information system, with its basic assumption of symmetric relationship between independent variables and dependent variables of the structural equation modeling. However, because previous studies have proved asymmetry of quality factors' influence structure on dependent variable by applying three-factor analysis, this study examined asymmetry of impact structure of quality factors introduced in IS Success Model on user satisfaction. Also the study applies structure equation modeling (SEM), three-factor analysis and importance and performance analysis (IPA) to develop resource allocation strategy for IS success. The study is able to provide IS practitioners with strategic implications for allocating and managing limited resources more effectively.

• Management Science and Financial Engineering
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• 제13권2호
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• pp.99-116
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• 2007

This paper considers the value of location in a linear city model and examines the product differentiation equilibrium of duopoly providing different benefits to consumers. We show that if the value of location is small, symmetric location equilibrium occurs where two firms follow the maximal differentiation principle. However, as the value of location increases, asymmetric location equilibrium occurs where the low-value-location firm moves to the high-value-location firm and thus adjusted maximal differentiation principle holds. We also investigate two different price leadership model and demonstrate the relationship between the value of location and the role of price leadership. In particular, we show that when the location value is high, the price leadership by high-value-location firm will appear as a unique equilibrium.

• The Journal of Asian Finance, Economics and Business
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• 제2권3호
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• pp.17-22
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• 2015

This paper examines the effect of impulsiveness of euro on Indian stock market. In order to examine the problem, we select rupee-euro exchange rates and S&P CNX NIFTY and BSE30 SENSEX to represent stock price. We select euro as it considered as second most widely used currency at the international level after dollar. The data are collected a daily basis over a period of 3-Apr-2007 to 30-Mar-2012. The statistical and time series properties of each and every variable have examined using the conventional unit root such as ADF and PP test. Adopting a generalized autoregressive conditional heteroskedasticity (GARCH) and exponential GARCH (EGARCH) model, the study suggests a negative relationship between exchange rate and stock prices in India. Even though India is a major trade partner of European Union, the study couldn't find any significant statistical effect of fluctuations in Euro-rupee exchange rates on stock prices. The study also reveals that shocks to exchange rate have symmetric effect on stock prices and exchange rate fluctuations have permanent effects on stock price volatility in India.

• KSII Transactions on Internet and Information Systems (TIIS)
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• 제6권6호
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• pp.1649-1667
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• 2012

In order to improve the accuracy and universality of the flow metric correlation analysis, this paper firstly analyzes the characteristics of Internet flow metrics as random variables, points out the disadvantages of Pearson Correlation Coefficient which is used to measure the correlation between two flow metrics by current researches. Then a method based on Symmetrical Uncertainty is proposed to measure the correlation between two flow metrics, and is extended to measure the correlation among multi-variables. Meanwhile, the simulation and polynomial fitting method are used to reveal the threshold value between different correlation degrees for SU method. The statistical analysis results on the common flow metrics using several traces show that Symmetrical Uncertainty can not only represent the correct aspects of Pearson Correlation Coefficient, but also make up for its shortcomings, thus achieve the purpose of measuring flow metric correlation quantitatively and accurately. On the other hand, reveal the actual relationship among fourteen common flow metrics.

• 디지털융복합연구
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• 제6권1호
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• pp.63-73
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• 2008

The present study attempted to explore effective scanning and monitoring in process of risk management on agri-marine products distribution policy. The interest public's group interests clash in accordance with theme for issue on marking policy. For executing a better systematic scanning and monitoring on actual affairs of marketing, selecting information personnel, gathering and analysing information, issue and risk management and their valuation with ongoing and simultaneously. Especially, In order to explore effective scanning and monitoring as a model of risk management, the study attempted to analyze within and without environment of marketing, to analyze issue management strategy, to evaluate issue activity for likelihood and impact, risk cycle analysis, interest public's group concerned, grade of interest public's group threatened(power, legitimacy, willingness), rapport(staying close, credibility, meeting expectation). And the study make an ongoing observation progress of subjects, and the serious subjects need have made an close observation. The study suggested to establish friendly relationship between organization and interest public's group, and to regularly accomplish two-way symmetric communication.