• Title/Summary/Keyword: rough

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A Study on Fuzzy-Rough sets (퍼지-Rough 집합에 관한 연구)

  • 정구범;김명순
    • Journal of the Korea Society of Computer and Information
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    • v.1 no.1
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    • pp.183-188
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    • 1996
  • Fuzzy sets Introduced by Zadeh is a concept which can process, and reson a vague Information using membership functions. The notion of rough sets introduced by Pawlak is based on the ability to classify. reduce. and perform approximation reasoning for the Indiscernible data.A comparison between fuzzy sets and rough sets has been given In Pawlak where it is shown that these concepts are different and can't combine each other. The purpose of this paper Is to Introduce and define the notion of fuzzy-rough sets which joins the membership function of fuzzy sets to the rough sets.

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ROUGH PRIME IDEALS AND ROUGH FUZZY PRIME IDEALS IN GAMMA-SEMIGROUPS

  • Chinram, Ronnason
    • Communications of the Korean Mathematical Society
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    • v.24 no.3
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    • pp.341-351
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    • 2009
  • The notion of rough sets was introduced by Z. Pawlak in the year 1982. The notion of a $\Gamma$-semigroup was introduced by M. K. Sen in the year 1981. In 2003, Y. B. Jun studied the roughness of sub$\Gamma$-semigroups, ideals and bi-ideals in i-semigroups. In this paper, we study rough prime ideals and rough fuzzy prime ideals in $\Gamma$-semigroups.

Antioxidant Activities of Ethanol Extracts from Germinated Specialty Rough Rice

  • Lee, Youn-Ri;Woo, Koan-Sik;Kim, Kee-Jong;Son, Jong-Rok;Jeong, Heon-Sang
    • Food Science and Biotechnology
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    • v.16 no.5
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    • pp.765-770
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    • 2007
  • To examine the possibility of using rough rice as a health-functional food, we investigated its changes in biological activity with germination. Antioxidant activities of the 70% ethanolic extracts of 'Goami2', 'Keunnunbeyo', and 'Heugkwangbeyo' were studied in comparison with those of ungerminated rough rice. The phytic acid level in rough rice decreased on germination, while the level of phenolic compounds increased. Reducing power increased in a dose-dependent manner and the germinated rough rice tended to have enhanced reducing power. Among the rough rice cultivars, the germinated 'Heugkwang' rough rice tended to be the most effective, with scavenging activities for the DPPH, superoxide, and hydroxyl radicals that were 1.6-, 1.3-, and 1.6-fold greater than those of the ungerminated 'Heugkwang' rough rice, respectively. We also found that the germination process increased antioxidant activity in all the rough rice cultivars, where activity was greatest for the 'Heugkwang' rough rice cultivar.

Aspects of Children's Rough-and-Tumble Play during the Outdoor Play and Effects of Gender and Social Competence (바깥놀이에서 나타나는 유아의 거친 신체 놀이 양상 및 관련 변인 분석)

  • Kim, Young-Ah;Shin, Hae-Young
    • Korean Journal of Human Ecology
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    • v.16 no.5
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    • pp.945-955
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    • 2007
  • The purpose of this study was to explore the characteristics of the children's rough-and-tumble play, and investigate the differences in rough-and-tumble play according to children's gender and social competence. The subjects were 80 five to six year-old children. The children's behaviors during the outdoor play were observed by a modified version based on the Rough-and-Tumble Play Categories(Humphreys & Smith, 1987). Children's social competence was measured by using the Scale for the Social Competence of Kindergarten(Doh, 1994). The data were analyzed by descriptive statistics, t-test, and ANCOVA. The results were as follows: Firstly, about 25.6% of outdoor play types was rough-and-tumble play behaviors. Specifically, children's rough-and-tumble play was more 'chasing' behaviors than 'mock-fighting' behaviors. Secondly, boys involved in rough-and-tumble play more often than girls did. In general, boys participated more frequently in various rough-and-tumble play categories, whereas girls involved only in chasing behavior more often. Finally, controlled by sex, children with higher social competence participated more frequently in rough-and-tumble play, which showed statistical significance. In conclusion, children's rough-and-tumble play behaviors were related to the gender and the social competence.

AN EXTENSION OF SOFT ROUGH FUZZY SETS

  • Beg, Ismat;Rashid, Tabasam
    • Korean Journal of Mathematics
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    • v.25 no.1
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    • pp.71-85
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    • 2017
  • This paper introduces a novel extension of soft rough fuzzy set so-called modified soft rough fuzzy set model in which new lower and upper approximation operators are presented together their related properties that are also investigated. Eventually it is shown that these new models of approximations are finer than previous ones developed by using soft rough fuzzy sets.

ROUGH ANTI-FUZZY SUBRINGS AND THEIR PROPERTIES

  • ISAAC, PAUL;NEELIMA, C.A.
    • Journal of applied mathematics & informatics
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    • v.33 no.3_4
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    • pp.293-303
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    • 2015
  • In this paper, we shall introduce the concept of rough antifuzzy subring and prove some theorems in this context. We have, if µ is an anti-fuzzy subring, then µ is a rough anti-fuzzy subring. Also we give some properties of homomorphism and anti-homomorphism on rough anti-fuzzy subring.