• 제목/요약/키워드: $m$-semicontinuous

검색결과 21건 처리시간 0.023초

m-SEMIOPEN SETS AND M-SEMICONTINUOUS FUNCTIONS ON SPACES WITH MINIMAL STRUCTURES

  • Min, Won-Keun
    • 호남수학학술지
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    • 제31권2호
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    • pp.239-245
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    • 2009
  • In this paper, we introduce the notions of m-semiopen sets and M-semicontinuous functions on spaces with minimal structures and study some properties of such notions. In particular, we investigate characterizations for the M-semicontinuous function and the relationship between M-continuity and M-semicontinuity.

INTERVAL-VALUED FUZZY m-SEMIOPEN SETS AND INTERVAL-VALUED FUZZY m-PREOPEN SETS ON INTERVAL-VALUED FUZZY MINIMAL SPACES

  • Min, Won-Keun;Kim, Myeong-Hwan;Kim, Jung-Il
    • 호남수학학술지
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    • 제31권1호
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    • pp.31-43
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    • 2009
  • We introduce the concepts of IVF m-semiopen sets, IVF m-preopen sets, IVF m-semicontinuous mappings and IVF m-precontinuous mappings on interval-valued fuzzy minimal spaces. We investigate characterizations of IVF m-semicontinuous mappings and IVF m-precontinuous mappings and study properties of IVF m-semiopen sets and IVF m-preopen sets.

Semicontinuous Production of Red Pigment by Immobilized Cells of Bacillus sp BH-99 Using Column Bioreactor

  • Ryu, Beung-Ho
    • Biotechnology and Bioprocess Engineering:BBE
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    • 제8권1호
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    • pp.19-22
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    • 2003
  • The semicontinuous production of red pigment by immobilized cells of Bacillus sp. B H-99 was investigated in comparison with free cells. The red pigment produced highest productivity under the conditions of aeration of 0.2 mL/min and 2 mm diameter of gel beads by using 3.0% sodium alginate. Semicontinuous production by immobilized cells showed the highest productivity with replacement of fresh production medium in every 72 h for fourth fermentation cycle following the conditions of red pigment productivity.

On Fuzzy r-Minimal Semicompactness on Fuzzy r-Minimal Spaces

  • Min, Won-Keun
    • International Journal of Fuzzy Logic and Intelligent Systems
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    • 제11권2호
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    • pp.103-107
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    • 2011
  • The concepts of fuzzy r-minimal semicompact, almost fuzzy r-minimal semicompact, and nearly fuzzy r-minimal semicompact on fuzzy r-minimal spaces arc introduced. We also investigate the relationships between fuzzy r-M-semicontinuous mappings and several types of fuzzy r-minimal semicompactness.

Air Bubble Column Reactor를 이용하여 Bacillus Subtilis KS-380의 고정화에 의한 치자로부터 청색 색소의 생산 (Semicontinuous Production of Blud Pigment from Gardenia Fruit by Immobilized Cells of Bacillus subtilis KS-380 Using Air Bubble Column Reactor)

  • 류병호;조경자
    • 한국식품영양과학회지
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    • 제19권5호
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    • pp.395-402
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    • 1990
  • The semicontinuous production of blue pigment from gardenia fruit by immobilized cells of Bacillus subtilis KS-380 which excreted $\beta$-glucosidase was investigated in comparison with free cells, . The blue pigment produced higher productivity under the conditions of aeration of 0.2m$\ell$/min and 2mm diameter of gel beads by using 3.5% sodium alginate. Semicontinuous production by immobilized cell showed the highest productivity with replacement of fresh production medium in every 24hr for fourth fermentation cycle following the conditions of blue pigment productivity.

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