• Title/Summary/Keyword: Uniform consistency

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Mechanical and wear properties evaluation of Al/Al2O3 composites fabricated by combined compo-casting and WARB process

  • Vini, Mohamad Heydari;Daneshmand, Saeed
    • Advances in Computational Design
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    • v.7 no.2
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    • pp.129-137
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    • 2022
  • Compo-casting method is one of the popular technique to produce metal based matrix composites. But, one of the main challenges in this process is un-uniform spreading of reinforced subdivisions (particles) inside the metallic matrix and the lack of desirable mechanical properties of the final produced composites due to the low bonding strength among the metal matrix and reinforcement particles. To remove these difficulties and to promote the mechanical properties of these kind of composites, the WARM ARB technique was utilized as supplementary technique to heighten the mechanical and microstructural evolution of the casted Al/Al2O3 composite strips. The microstructure evolution and mechanical properties of these composites have been considered versus different WARM ARB cycles by tensile test, average Vickers micro hardness test, wear test and scanning electron microscopy (SEM). The SEM results revealed that during the higher warm- ARB cycles, big alumina clusters are broken and make a uniform distribution of alumina particles. It was shown that cumulating the forming cycles improved the mechanical properties of composites. In general, combined compo-casting and ARB process would consent making Al/Al2O3 composites with high consistency, good microstructural and mechanical properties.

STUDY ON THE INFLUENCE OF POLYOL ON MICROEMULSION GEL SYSTEM (Microemulsion gel system에 있어서 Polyol의 효과에 관한 연구)

  • Youn, J.;Jin, P.K.
    • Journal of the Society of Cosmetic Scientists of Korea
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    • v.18 no.1
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    • pp.132-149
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    • 1992
  • This study relates to a microemulsion gel which is applied in various cosmetic preparations because of good appearance, superior stability and a thin, uniform, non-greasy fi Am on the skin. Main object of this study is to elucidate the influence of polyol(clarifying agent and/or coupling agent in microemulsion) on microemulsion and to establish the optimum conditions for microemulsion gel formation in the view of superior consistency, stability, clarity and pick-up from a container. The constituents of the system are composed of water, polar ester oi1, nonionic surfactant and polyol. Using the three-component phase diagram and the tetrahedral-phase diagram, we have investigated the changes of transparence regions, consistency and resonance effect by an impact in microemulsion gel varying in polyol ratio. The results of this study showed that the variation in the content of water and couple ins agent has major influence on the microemulsion gel and the optimum formation region of microemulsion gel is the widest when the ratio of glycerine(coupling agent) to water is 63-75% It is believed that optimum use of polyol seems to be helpful to obtain the microemulsion gel containing maximum amount of oil phase with minimum amount of surfactant which is recently one of the major problems of cosmetic chemists.

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The Translation Method to formal specification of Object Model (객체모델에 대한 형식명세로의 변환 방법)

  • Lim, Keun;Kwon, Young-Man
    • Journal of the Korea Society of Computer and Information
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    • v.8 no.4
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    • pp.21-27
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    • 2003
  • In these paper, we define object models in order to represent a correct analysis model, propose translation method to formal specification necessary to uniform and standard. The translated model provide to correctness, consistency and completeness. If it is happen to error in the VDM specification, we can verify model to adapt initial object model step. It increase correctness to retrieval, reduce the costs and efforts of after development because of the verified model used to basic specification in design step.

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Implementation of Integrated CPU-GPU for Efficient Uniform Memory Access Method and Verification System (CPU-GPU간 긴밀성을 위한 효율적인 공유메모리 접근 방법과 검증 시스템 구현)

  • Park, Hyun-moon;Kwon, Jinsan;Hwang, Tae-ho;Kim, Dong-Sun
    • IEMEK Journal of Embedded Systems and Applications
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    • v.11 no.2
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    • pp.57-65
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    • 2016
  • In this paper, we propose a system for efficient use of shared memory between CPU and GPU. The system, called Fusion Architecture, assures consistency of the shared memory and minimizes cache misses that frequently occurs on Heterogeneous System Architecture or Unified Virtual Memory based systems. It also maximizes the performance for memory intensive jobs by efficient allocation of GPU cores. To test between architectures on various scenarios, we introduce the Fusion Architecture Analyzer, which compares OpenMP, OpenCL, CUDA, and the proposed architecture in terms of memory overhead and process time. As a result, Proposed fusion architectures show that the Fusion Architecture runs benchmarks 55% faster and reduces memory overheads by 220% in average.

Terms of Letter of Credit and Standard for Examination of Documents (신용장조건(信用狀條件)과 서류심사(書類審査)의 기준(基準) 검토(檢討))

  • Kang, Won-Jin
    • THE INTERNATIONAL COMMERCE & LAW REVIEW
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    • v.13
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    • pp.495-513
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    • 2000
  • In this paper, I examined the terms of letter of credit and standard for examination of documents. In connection with the test of standard, I reviewed the bank's reasonable care, inconsistence and linkage between documents, non-documentary conditions and the treatment of discrepant documents. Traditionally credit law is founded on two principles such as the standards of strict of compliance and substantial compliance, but these standards are not consistency. Moreover although the Uniform Customs and Practice for Documentary Credits(UCP) introduces a new standard for examination of documents by incorporating international banking practice, the standards for documentary compliance have created ambiguity. Accordingly, I suggest that the standard requires strict compliance between party concerned in letter of credit transactions but only requires international standard banking practice in customer relationship. Therefore the standard and the specific guideline should be prescribed in the next version of the UCP.

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Partially linear multivariate regression in the presence of measurement error

  • Yalaz, Secil;Tez, Mujgan
    • Communications for Statistical Applications and Methods
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    • v.27 no.5
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    • pp.511-521
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    • 2020
  • In this paper, a partially linear multivariate model with error in the explanatory variable of the nonparametric part, and an m dimensional response variable is considered. Using the uniform consistency results found for the estimator of the nonparametric part, we derive an estimator of the parametric part. The dependence of the convergence rates on the errors distributions is examined and demonstrated that proposed estimator is asymptotically normal. In main results, both ordinary and super smooth error distributions are considered. Moreover, the derived estimators are applied to the economic behaviors of consumers. Our method handles contaminated data is founded more effectively than the semiparametric method ignores measurement errors.

Automated System for Response Time and Flicker Optimization in LCDs

  • Park, Bong-Im;Kim, Tae-Sung;Oh, Jae-Ho;Berkeley, Brian H.;Kim, Sang-Soo
    • 한국정보디스플레이학회:학술대회논문집
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    • 2005.07a
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    • pp.499-501
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    • 2005
  • One of representative techniques for compensation of LC's slow response characteristic is the Response Time Acceleration (RTA) technique. The conventional data definition for the RTA is based on the manual measurement and thus it takes long time. Therefore it is almost impossible to use panel specific compensation data in MP line. We have developed a new automated measurement system and flicker minimization for this purpose, which could achieve dramatic measurement time reduction, consistency over different operator, and optimized values as well. This system laid the groundwork for the application of image quality enhancement technologies to panels individually, and using this system, we can expect very uniform image quality for all LCD panels.

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Kernel Estimation of Hazard Ratio Based on Censored Data

  • Choi, Myong-Hui;Lee, In-Suk;Song, Jae-Kee
    • Journal of the Korean Data and Information Science Society
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    • v.12 no.2
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    • pp.125-143
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    • 2001
  • We, in this paper, propose a kernel estimator of hazard ratio with censored survival data. The uniform consistency and asymptotic normality of the proposed estimator are proved by using counting process approach. In order to assess the performance of the proposed estimator, we compare the kernel estimator with Cox estimator and the generalized rank estimators of hazard ratio in terms of MSE by Monte Carlo simulation. Two examples are illustrated for our results.

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Design of C31 Integrated Network Management Architecture based on TMN Concept (TMN 개념을 이용한 C31 통합 통신망 관리 구조 설계)

  • 김도현
    • Journal of the military operations research society of Korea
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    • v.23 no.1
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    • pp.115-137
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    • 1997
  • It was required Integrated Network Management Architecture(INMA) with consistency and standardization in order to support efficiently communication service for operators and users. In such ITU-T(International Telecommunication Union - Telecommunication) recommended TMN(Telecommunication Management Network) which is Network management architecture for telecommunication, and intended to achieve uniform and comprehensive network management using standardized network management interface. This paper proposes C31 management services and management functions based on ITU-T and RACE project. This designs C31 INMA based on TMN concept in order to manage efficiently C31 communication network. The C31 INMA supports to manage C31 LAN and WAN devices and lines with global and correspondence, and helps Integrated Network Management system design and implementation.

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A study on the harmonization for developing ENC consistency (전자해도 일관성 향상을 위한 Harmonization 방안 연구)

  • Ko, Hyun-Joo;Oh, Se-Woong;Sim, Woo-Sung;Suh, Sang-Hyun;Youn, Chung
    • Proceedings of the Korean Institute of Navigation and Port Research Conference
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    • 2012.10a
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    • pp.115-116
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    • 2012
  • ENC internationality is emphasized by promoting coordination between international organizations recently. However, as a uniform chart pattern is more than ncecessary for save and comfortable navigation between adjacent countries, it is expected to require base technology to solve this problems. In this study, we define each other's different needs and object of Harmonization and identify the base technology by analyzing the case of foreign coutries' Harmonization to come up with an effective counterplan. In addition we analyze and arrange the difference between Korea and other countries in the point of the topic classified from examples of other countries. In conclusion, the effects are drawn from that by conducting this analyzing.

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