• Title/Summary/Keyword: Tolerance value

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Robust Design considering Tolerance Bands of Design Variables and Material Properties (설계변수 및 물성치의 공차영역을 고려한 강건설계)

  • 안병철;이종수
    • Proceedings of the Korean Society for Noise and Vibration Engineering Conference
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    • 2001.11a
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    • pp.419-426
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    • 2001
  • Industrial products determined by fixed size posses definite limits variety by manufacture tolerance in existence. The optimum value solved by deterministic approaches do not account of tolerance bands of design variables and material properties. If we examine optimum value considering tolerance bands of design variables and material properties, it might be useless, owing to exist infeasible region. We have two ways to prevent being useless value. The one is to minimize tolerance band, the other is to consider tolerance band in optimum design. The former needed more accuracy during manufacturing process require higher production cost, the letter is more appropriate to consider tolerance band. In this research, we consider the tolerance bands of all variables, which might have the tolerance bands used in the problem, based on optimum value of deterministic approaches. Orthogonal arrays are used to minimize the number of trial. Tolerance bands are supposed discretionary according to design variable. Appropriateness suggested by this research is examined through two examples. Mathematical problem is investigated only in terms of tolerance bands of design variables, and cantilever beam problem is explained through tolerance bands of design variable, material properties and loading conditions. It is proved that values from the presented method are satisfactory for tolerance bands of variables.

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France, Tolerance and Populism: Diagnosis and Anlalysis of the Rise of the Far-right and Spread of Hatred Against Immigrants

  • Soelah Kim
    • Analyses & Alternatives
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    • v.7 no.1
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    • pp.201-227
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    • 2023
  • The purpose of this study is to examine how France became a representative country for far-right European populism, despite its tradition of tolerance. To achieve this goal, we examine, first, how the concept of tolerance developed in France after the 16th century. Through this process, we find that within the political system, the tolerance of the liberal tradition met with universalism, a republican value, and developed into an 'institutional tolerance' that allowed 'differences' from an authoritarian perspective rather than on an equal level. This 'assimilation' policy, reflecting a 'patriarchal' and 'oppressive' institutional tolerance, formed the keynote of the immigration policy of the 20th century, which continued until the 1980s, and shows that the French government did not take practical steps for the social integration of immigrant groups under the republican universal value that does not allow 'differences.' The government came up with an 'integration' immigration policy that embraces cultural 'differences' only after encountering problems with immigrant groups. However, this was not enough to calm the antipathy towards immigrants in French society and the discontent of immigrants in French society. Also, universalism, a republican value with deep roots in France, prevented the French immigration policy from escaping its assimilationist nature even in the 21st century. In the midst of this, far-right parties have gained power by promoting xenophobic sentiments centered on immigration problems. Finally, this study also looks at how far-right populism is currently changing the French political environment.

Study on Evaluating Displacement Tolerance of Sky-bridge in Tall Buildings (고층 스카이브리지의 변위 허용치 산정에 대한 연구)

  • Kim, Yun Gon
    • Journal of the Architectural Institute of Korea Structure & Construction
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    • v.36 no.4
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    • pp.135-142
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    • 2020
  • The new method for evaluating the displacement tolerance of sky-bridges with pin-roller type supports was proposed considering both return period of phase difference between connected buildings and geometrical characteristics of skybridge. Because displacement tolerance is relative value, which is most affected by the phase difference of the connected buildings, the dynamic response of these building with time history analysis should be evaluated. However, the initial phase could not be specified, so the result of displacement tolerance would be varied with respect to initial value. Thus, the tolerance can be reasonably evaluated SRSS calculation with design displacements based on statistical approach and of each building. In addition, the geometrical characteristics of sky-bridge should be considered because the transverse displacement of sky-bridge span causes the shear deformation of the bridge and longitudinal displacement tolerance cannot release the shear deformation. Therefore, the some pin-end support in sky-bridge should have longitudinal displacement tolerance to accommodate the shear deformation. By resolving this shear deformation, it is possible not only to accommodate transverse displacement, but also to avoid the complicated joint details such as both pot bearing and guided supports with shear key.

Technique of Drug Tolerance Test for Selection of Antibacterial Agents and It′s Clinical Value (항균제내성의 검사요령과 임상적응용)

  • Kim Kyo-Joon
    • Journal of Veterinary Clinics
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    • v.1 no.1
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    • pp.41-47
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    • 1984
  • The author carried out bovine mastitis test by California Mastitis test(CMT) for the milk from dairy cows in the surburbs of Taejeon. In order to select prefer commercial therapeutic antibacterial agents for mastitis treatment, Staphylococcus aureus were isolated from the CMT positive milk and the strains were tested for the tolerance test to the agents. The results obtained were summarized as follows : 1. The tolerance test appeared graduate tolerance in cases with continuously repeat of therapeutic agents. 2. The antibacterial agents revealed strong tolerance were D-and E-ointments. 3. The antibacterial agents revealed suspect tolerance were A-and F-ointments and ampicillin, penicillin, kanamycin and streptomycin. 4. The antibacterial agents revealed non or rare tolerance were B-and G-ointments and chloramphenicol, erythromycin and oxytetracycline. 5, It is concluded that the use of 3-day-interval in turn with antibacterial agents selected by tolerance test may be beneficial.

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Noise Evaluation Considering the Uncertainty Variation According to Frequency

  • Lee, Chulwon;Koo, SeungJun;Kong, Young Mo
    • Proceedings of the Korean Society for Noise and Vibration Engineering Conference
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    • 2014.04a
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    • pp.191-196
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    • 2014
  • In the evaluation of measured noise data, tolerance shall be decided based on the uncertainty. The uncertainty has frequency variations due to the different standard deviations at each frequency. Therefore, tolerance shall be differently decided for each frequency with the same confidence probability. In the report, the evaluation method considering the frequency variation of uncertainty will be introduced. From the approach, considering the actual noise distribution characteristics of the ships, the tolerance shall be decided for each frequency with the same probability, but the overall averaged value shall be kept to the value designated in each notation.

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Fault Location Algorithm using Software Fault Tolerance (Software Fault Tolerance를 이용한 송전선로의 고장점 표정 알고리즘)

  • Jang, Yong-Won;Han, Seung-Su;Kim, Won-Ha
    • Proceedings of the KIEE Conference
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    • 2003.11c
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    • pp.875-877
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    • 2003
  • This paper use fault location algorithm for single-phase-to-ground faults on the teed circuit of a parallel transmission line that use only local end voltage and current information. When Newton-Raphson iteration method is used, the Initial value may cause error or cause not suitable result. Suggested new calculation model uses NVP methodology, which is one of the fault tolerance technology to solve this problem. EMTP simulation result has shown effectiveness of the algorithm under various conditions.

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Self-Reference PCSR-G Method for Detecting Defect of Flat Panel Display (평판 디스플레이 결함 검출을 위한 자기 참조 PCSR-G 기법)

  • Kim, Jin-Hyung;Lee, Tae-Young;Ko, Yun-Ho
    • Journal of Korea Multimedia Society
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    • v.18 no.3
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    • pp.312-322
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    • 2015
  • In this paper a new defect detection method for flat panel display that does not require any separately prepared reference images and shows robustness against problems with regard to pixel tolerance and nonuniform illumination condition is proposed. In order to perform defect detection under any magnification value of camera, the proposed method automatically obtains the value of pattern interval through an image analysis. Using the information for pattern interval, an advanced PCSR-G method presented in this paper utilizes neighboring patterns as its reference images instead of utilizing any separately prepared reference images. Also this paper proposes a scheme to improve the performance of the conventional PCSR-G method by extracting and applying additional information for pixel tolerance and intensity distribution considering the value of pattern interval. Simulation results show that the performance of the proposed method utilizing pixel tolerance and intensity distribution is superior to that of the conventional method. Also, it is proved that the proposed method that is implemented using parallel technique based on GPGPU can be applied to real system.

Studies on Tolerance Level Against Antheraea mylitta Cytoplasmic Polyhedrosis Virus (AmCPV) in Different Eco-races of Tropical Tasar Silkworm, Antheraea Mylitta Drury

  • Singh, G.P.;Zeya, S.B.;Srivastava, A.K.;Ojha, N.G.;Suryanarayana, N.
    • International Journal of Industrial Entomology and Biomaterials
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    • v.17 no.1
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    • pp.153-155
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    • 2008
  • Pathogenic infection in tasar silkworm, Antheraea mylitta Drury is common and there is a breed specific response regarding tolerance. Hence, the tolerance level of three eco-races of tasar silkworm viz. Daba, Sarihan and Raily to Antheraea mylitta cytoplasmic polyhedrosis virus (AmCPV) infection was tested. The survival of Daba, Sarihan and Raily eco-races was significantly different (p<0.05) when challenged with the same concentration ($1{\times}10^5$ polyhedra/ml) of AmCPV. Daba eco-race was more tolerant to the AmCPV infection having higher survival (65.7%) and $LC_{50}$ values (1000893.17 polyhedra/ml) of AmCPV followed by Sarihan eco-race (50.7% survival and $LC_{50}$ value of AmCPV 187203.6168 polyhedra/ml) and Raily eco-race (24.3% survival and $LC_{50}$ value of AmCPV 5176.37 polyhedra/ml). The tolerance level of Daba and Sarihan eco-races against AmCPV was more than two times than Raily eco-race.

A Study on the Design of Tolerance for Process Parameter using Decision Tree and Loss Function (의사결정나무와 손실함수를 이용한 공정파라미터 허용차 설계에 관한 연구)

  • Kim, Yong-Jun;Chung, Young-Bae
    • Journal of Korean Society of Industrial and Systems Engineering
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    • v.39 no.1
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    • pp.123-129
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    • 2016
  • In the manufacturing industry fields, thousands of quality characteristics are measured in a day because the systems of process have been automated through the development of computer and improvement of techniques. Also, the process has been monitored in database in real time. Particularly, the data in the design step of the process have contributed to the product that customers have required through getting useful information from the data and reflecting them to the design of product. In this study, first, characteristics and variables affecting to them in the data of the design step of the process were analyzed by decision tree to find out the relation between explanatory and target variables. Second, the tolerance of continuous variables influencing on the target variable primarily was shown by the application of algorithm of decision tree, C4.5. Finally, the target variable, loss, was calculated by a loss function of Taguchi and analyzed. In this paper, the general method that the value of continuous explanatory variables has been used intactly not to be transformed to the discrete value and new method that the value of continuous explanatory variables was divided into 3 categories were compared. As a result, first, the tolerance obtained from the new method was more effective in decreasing the target variable, loss, than general method. In addition, the tolerance levels for the continuous explanatory variables to be chosen of the major variables were calculated. In further research, a systematic method using decision tree of data mining needs to be developed in order to categorize continuous variables under various scenarios of loss function.

Determination of Robust Tolerance on the Lower-level Characteristics (하위특성의 안정된 허용차 결정방법)

  • Kim, Kyung-Mo
    • Journal of Korean Society for Quality Management
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    • v.22 no.1
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    • pp.133-141
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    • 1994
  • The determination of the tolerance on the lower-level characteristics for the given upper-level characteristics is an indispensable problem in manufacturing industries. The procedure, proposed by Taguchi, for this matter can be easily applied in engineering fields due to its conceptual simplicity. However, the previously developed methods are known to have some limitations in the field applications, because the value of each major factor determining the tolerance cannot be obtained exactly. In this paper, a tolerance design procedure is proposed under the assumption that the major factors to determine the tolerance is uncertain. For the validity of the method proposed in this paper, a hypothetical problem is employed and analyzed.

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