• Title/Summary/Keyword: Common Science

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COMMON FIXED POINTS FOR COMPATIBLE MAPPINGS OF TYPE(A) IN 2-METRIC SPACES

  • WANG, WEN-ZUO
    • Honam Mathematical Journal
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    • v.22 no.1
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    • pp.91-97
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    • 2000
  • In this paper we obtain a criterion for the existence of a common fixed point of a pair of mappings in 2-metric spaces. Our result generalizes a number of fixed point theorems given by Imdad, Khan and Khan [1], Kahn and Fisher [2], Kubiak [3], Rhoades [5], and Singh, Tiwari and Gupta [6].

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A COMMON FIXED POINT THEOREM IN AN M*-METRIC SPACE AND AN APPLICATION

  • Gharib, Gharib M.;Malkawi, Abed Al-Rahman M.;Rabaiah, Ayat M.;Shatanawi, Wasfi A.;Alsauodi, Maha S.
    • Nonlinear Functional Analysis and Applications
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    • v.27 no.2
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    • pp.289-308
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    • 2022
  • In this paper, we introduce the concept of M*-metric spaces and how much the M*-metric and the b-metric spaces are related. Moreover, we introduce some ways of generating M*-metric spaces. Also, we investigate some types of convergence associated with M*-metric spaces. Some common fixed point for contraction and generalized contraction mappings in M*-metric spaces. Our work has been supported by many examples and an application.

Method for High-Frequency Modeling of Common-Mode Choke (공통모드 초크의 간단한 고주파 모델링 기법)

  • Jung, Hyeonjong;Yoon, Seok;Kim, Yuseon;Bae, Seok;Lim, Yeongseog
    • The Journal of Korean Institute of Electromagnetic Engineering and Science
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    • v.28 no.12
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    • pp.964-973
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    • 2017
  • In this paper, we analyze the effects of parasitic components of common-mode choke on the common mode and differential mode in a wide band, and we propose a simple method for high-frequency modeling. Common mode and differential mode 2-port networks were configured and the S-parameters in each mode were measured using a network analyzer. Equivalent circuit elements were extracted from the measured results to model a high-frequency equivalent circuit, and the validity was verified by comparing the measured S-parameters with the simulation results.

Fragmentation of Common Bile Duct and Pancreatic Duct Stones by Extracorporeal Shock-wave Lithotripsy (체외충격파쇄석술을 이용한 총담관 및 췌관 결석의 치료)

  • Kim, Ham-Gyum;Son, Soon-Yong;Lee, Won-Hong
    • Journal of radiological science and technology
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    • v.21 no.1
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    • pp.40-45
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    • 1998
  • To determine its usefulness and safety of extracorporeal shock-wave lithotripsy in common bile duct and pancreatic duct stones, we analyzed the results of 13 patients with common bile duct stones and 6 patients with pancreatic duct stones which were removed by endoscopic procedures using the balloon or basket, who was performed the extracorporeal shock-wave lithotripsy using the ultrasonography for stone localization with a spark gap type Lithotriptor(Dernier MPL 9000, Germany). Fragmentation and complete clearance of the common bile duct and pancreatic duct stones were obtained in 19 of 19 patients(100%). Apart from transient attacks of fever in 2 of 13 patients with common bile duct stones(15%) and mild elevation of serum amylase and lipase in 2 of 6 patients with pancreatic duct stones(33%), no other serious side effects were observed. In our experiences, extracorporeal shock-wave lithotripsy is a safe and useful treatment for endoscopically unretrievable common bile duct and pancreatic duct stones.

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Development of a Computer Code for Common Cause Failure Analysis (공통원인 고장분석을 위한 전산 코드 개발)

  • Park, Byung-Hyun;Cho, Nam-Zin
    • Nuclear Engineering and Technology
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    • v.24 no.1
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    • pp.14-29
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    • 1992
  • COMCAF, a computer code for the common-cause failure analysis, is developed to treat the common-cause failures in nuclear power plants. In the treatment of common-cause failures, the minimal cut sets of the system are obtained first without changing the fault-tree structure. The occurrence probabilities of the minimal cut sets are then calculated accounting for the common-cause failures among components in the same minimal cut set or in different minimal cut sets. The basic parameter model is used to model the common-cause failures between similar or identical components. For dissimilar components, the assumption of symmetry used in the basic parameter model is applied to the basic events affecting two or more components. The top event probability is evaluated using the inclusion-exclusion method. In addition to the common-cause failures of components in the same minimal cut sets, failures of components in the different minimal cut sets are also easily accounted for by this method. This study applied this common-cause failure analysis to the PWR auxiliary feedwater system. The results in the top event probability for the system are compared with those of no common-cause failures.

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Studies on Dermatophytosis of Common Seal and Elephant (물범 및 코끼리의 백선균증(白癬菌症)에 관한 연구(硏究))

  • Choi, Won Pil
    • Korean Journal of Veterinary Research
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    • v.21 no.2
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    • pp.113-116
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    • 1981
  • This experiment was undertaken to determine the causative agent of dermatophytosis occured in the 3 common seals and a elephant which were derived from the Tae-gu and Busan zoological gardens. Direct microscopic examination, culture and pathogenicity test were performed for the samples obtained from the skin lesions of the affected common seals and elephant. The causative agent was identified as Trichophyton mentagrophytes exclusively in these cases, and the present report describes the first cases of the common beat and elephant ringworm.

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