http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
Mamun, Md. Iqbal Rouf,Park, Jong Hyouk,Choi, Jeong-Heui,Kim, Hee Kwon,Choi, Woo Jung,Han, Seong-Soo,Hwang, Kyungsup,Jang, Nam-IK,Assayed, Mohamed Ezzat,El-Dib, Mohamed Anwer,Shin, Ho-Chul,El-Aty, A. M WILEY-VCH Verlag 2009 Journal of Separation Science Vol.32 No.4
<P>Several methods used for the multiresidue analysis of pesticides from the environment and drinking water have been reported. However, most of these reports dealt with a small number of targeted pesticides or some special groups. A method that is simple, faster, and more cost-effective than the environmental protection agency (EPA) method has been developed for the analysis of 82 frequently used pesticides in water samples obtained from Yeongsan and Sumjin rivers, as well as rice fields located in various locations around the two rivers. The samples were extracted by dichloromethane, and the pesticides were analyzed using a GC-electron capture detector (ECD), followed by confirmation with GC-MS. Recoveries were found to be between 82 and 120.1% for most of the tested pesticides, which were in agreement with the standard values dictated by the EPA. The method was potentially applied to 66 water samples for human consumption and 90 water samples from the rice fields and irrigation ditches that were collected from June to September 2007. Oxadiazon, butachlor, and alachlor were detected in some of the river water samples collected in June, iprobenfos (IBP) was detected in samples collected in August, and no pesticide was detected in September. On the other hand, chlorpyrifos-methyl, IBP, hexaconazole, diazinon, oxadiazon, butachlor, and isoprothiolane were detected at relatively high concentrations in 48 rice paddy field water samples collected between June and September 2007. Alachlor in one sample and procymidone in some of the rice paddy field water samples were also detected in trace amounts. The results were consistent with the temporal pattern of pesticide application in Korean rice fields.</P>
Fuzzy congruence relations on almost distributive lattices
Berhanu Assaye Alaba,Gezahagne Mulat Addis 원광대학교 기초자연과학연구소 2017 ANNALS OF FUZZY MATHEMATICS AND INFORMATICS Vol.14 No.3
In this paper we give several characterizations for fuzzy ideals, fuzzy homomorphisms, and fuzzy congruences of an almost distributive lattice. In addition, the quotient of an almost distributive lattice induced by a fuzzy congruence is also presented in the paper. Furthermore, we obtain a kind of fuzzy congruences for which their quotient is a distributive lattice and for which it is not. Mainly, we construct a monomorphism of the lattice of fuzzy ideals into the lattice of fuzzy congruences of almost Boolean rings, and we give a necessary and sufficient condition for this monomorphism to become a lattice isomorphism.
$e$-Fuzzy filters of MS-algebras
Berhanu Assaye Alaba,Teferi Getachew Alemayehu 강원경기수학회 2019 한국수학논문집 Vol.27 No.4
In this article, we present the notion of $ e$-fuzzy filters in an MS-Algebra and characterize in terms of equivalent conditions. The concept of $ D $-fuzzy filters is studied and the set of equivalent conditions under which every $ e $-fuzzy filter is an $ D $-fuzzy filter are observed. Moreover we study some properties of the space of all prime $ e $-fuzzy filters of an MS-algebra.
$L$-fuzzy prime ideals and maximal $L$-fuzzy ideals of a poset
Berhanu Assaye Alaba,Mihret Alamneh Taye,Derso Abeje Engidaw 원광대학교 기초자연과학연구소 2019 ANNALS OF FUZZY MATHEMATICS AND INFORMATICS Vol.18 No.1
In this paper we introduce the notions of $L$-fuzzy prime ideals, prime and maximal $L$-fuzzy ideals of a poset. We also study and establish some characterizations of them and give sufficient conditions for the existence of prime $L$-fuzzy ideals in the lattice of all $L$-fuzzy ideals of a poset.
Closure fuzzy ideals of MS-algebras
Berhanu Assaye Alaba,Teferi Getachew Alemayehu 원광대학교 기초자연과학연구소 2018 ANNALS OF FUZZY MATHEMATICS AND INFORMATICS Vol.16 No.2
In this paper, we introduce concepts of dominator fuzzy ideals and closure fuzzy ideals in MS-algebras and study some properties of these fuzzy ideals. It is proved that the lattice of all closure fuzzy ideals is isomorphic to the fuzzy ideal lattice of the lattice of all principal dominator ideals. A set of equivalent conditions is obtained to characterize closure fuzzy ideals of MS-algebras. Finally some properties of closure fuzzy ideals are studied with respect to homomorphisms.
Fuzzy ideals in demi-pseudocomplemented MS-algebras
Berhanu Assaye Alaba,Teferi Getachew Alemayehu 원광대학교 기초자연과학연구소 2019 ANNALS OF FUZZY MATHEMATICS AND INFORMATICS Vol.18 No.2
In this paper, we study fuzzy congruences, kernel fuzzy ideals and $ (\circ,\ast)$-fuzzy ideals of a demi-pseudocomplemented MS-algebra $ L $. In particular, we study the fuzzy congruence relation generated by fuzzy relation and its properties. Also we prove that $(\circ,\ast)$-fuzzy ideals form a sublattice of fuzzy ideals of $ L $, and the set of these fuzzy ideals is isomorphic to the closed interval $ G_{F} $ and $\chi_{\iota} $ of the fuzzy congruence lattice of $ L $ where $ G_{F} $ is Glievenko fuzzy congruence and $ \chi_{\iota} $ is the universal fuzzy congruence.
δ-FUZZY IDEALS IN PSEUDO-COMPLEMENTED DISTRIBUTIVE LATTICES
Berhanu Assaye Alaba,Wondwosen Zemene Norahun 한국전산응용수학회 2019 Journal of applied mathematics & informatics Vol.37 No.5
In this paper, we introduce δ-fuzzy ideals in a pseudo complemented distributive lattice in terms of fuzzy filters. It is proved that the set of all δ-fuzzy ideals forms a complete distributive lattice. The set of equivalent conditions are given for the class of all δ-fuzzy ideals to be a sublattice of the fuzzy ideals of L. Moreover, δ-fuzzy ideals are characterized in terms of fuzzy congruences.
$\beta$-fuzzy filters in MS-algebras
Berhanu Assaye Alaba,Teferi Getachew Alemayehu 강원경기수학회 2019 한국수학논문집 Vol.27 No.3
In this paper, we introduce the concept of $ \beta $-fuzzy filters in MS-algebras and $ \beta $-fuzzy filters are characterized in terms of boosters. It is proved that the lattice of $ \beta $-fuzzy filters is isomorphic to the fuzzy ideal lattice of boosters.
α-fuzzy ideals and space of prime α-fuzzy ideals in distributive lattices
Berhanu Assaye Alaba,Wondwosen Zemene Norahun 원광대학교 기초자연과학연구소 2019 ANNALS OF FUZZY MATHEMATICS AND INFORMATICS Vol.17 No.2
In this paper, we introduce the concept of $\alpha$-fuzzy ideals of a distributive lattice. We prove that the set of all $\alpha$-fuzzy ideals of a lattice forms a complete distributive lattice. A set of equivalent conditions are derived for a fuzzy ideal of a lattice to become an $\alpha$-fuzzy ideal. We also topologize the set of all prime $\alpha$-fuzzy ideals of a distributive lattice. Properties of the space also studied. Moreover, a set of equivalent conditions are given the space of all prime $\alpha$-fuzzy ideals of $L$ to become Hausdorff and regular.
$\sigma$-fuzzy ideals of distributive p-algebras
Berhanu Assaye Alaba,Wondwosen Zemene Norahun 원광대학교 기초자연과학연구소 2019 ANNALS OF FUZZY MATHEMATICS AND INFORMATICS Vol.17 No.3
In this paper, we introduce the concept of $\sigma$-fuzzy ideals in distributive $p$-algebras. It is proved that the set of all $\sigma$-fuzzy ideals forms a complete distributive lattice. Moreover, the class of all $\sigma$-fuzzy ideals of a distributive $ p $-algebra is isomorphic to the class of fuzzy ideals of the lattice of all booster ideals. Finally, we prove that the image and pre-image of $\sigma$-fuzzy ideals are also $\sigma$-fuzzy ideals.