http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
Quotient Rings of Endomorphism Rings of Nonsingular Modules
Lee, Euichan 한국외국어대학교 외국학종합연구센터 부설 기초과학연구소 1996 기초과학연구 Vol.5 No.-
Let M be an R-module, S=End(M), and Q=End(E(M)). We show that if M is a regular module, then S is right nonsingular and Q=E(Ss). We also show that if M is a finite dimensional regular module, then Q is a semisimple classical right quotient ring of S.
On Injective Hulls of Endomorphism Rings of Nonsingular Continuous Modules
Lee, Euichan 한국외국어대학교 외국학종합연구센터 부설 기초과학연구소 1989 기초과학연구 Vol.1 No.-
We obtained a characterization of a ring which possess a strongly regular classical right quotient ring. Let M be a nonsingular continuous module, S = End(M), and Q = End(E(M)). We proved that if Q is unit regular and M is a characteristic submodule of E(M), then Q is the injective hull of S??. We also showed that if M is uniform and T(Q/S)=Q/S, then Q=E(S??) and Q is a strongly regular classical right quotient ring of S.
Lee, Euichan 한국외국어대학교 외국학종합연구센터 부설 기초과학연구소 1996 기초과학연구 Vol.4 No.-
It was shown that if M is a quasi-injective module and N is a continuous module which is a direct summand of any quasi-injective module containing N, and if f:M →N and g:N →M are monomorphisms, then M is isomorphic to N. Hence two quasi-injective modules which are isomorphic to submodules of each other are isomorphic.
LEE, EUICHAN 한국외국어대학교 외국학종합연구센터 부설 기초과학연구소 1999 기초과학연구 Vol.9 No.-
Let M be an R-module, S=End (M). We show that if M is a regular module and S is a right CS ring, then M is a CS module.
A Note on Quasi-injective Modules
LEE, EUICHAN,LIM, MOKHWA 한국외국어대학교 외국학종합연구센터 부설 기초과학연구소 2003 기초과학연구 Vol.16 No.-
In general, a finite direct sum of quasi-injective modules need not be quasi-injective. In this note, it is shown that if M₁ and M₂ be modules, then M₁○M₂ is quasi-injective if and only if M_(i) is M_(j)-injective for all i, j.
LEE, EUICHAN 한국외국어대학교 외국학종합연구센터부설기초과학연구소 1991 기초과학연구 Vol.2 No.-
We obtained a characterization of regular rings which are right self-injective. Let M be a nonsingular module, S = End(M), and Q = End(E(M)). It was shown that if for every nonzero cyclic submodule N of M there exists an epimorphism from M onto N, then Q is the injective hull of S??.
LEE, EUICHAN 한국외국어대학교 외국학종합연구센터 부설 기초과학연구소 1993 기초과학연구 Vol.3 No.-
It was shown that every continuous module has the finite exchange property. Let R be a nonsingular right continuous ring and M atorsion free R-module. It was shown that M is a finitely generated regular module if and only if M is a finite direct sum of cyclic continuous modules.
Feasibility Analysis of Alternative Electricity Systems by 2030 in the Post-Fukushima Era
Euichan Jeon,박년배,Sanghoon Lee,Jin-Yi Han 한국대기환경학회 2014 Asian Journal of Atmospheric Environment (AJAE) Vol.8 No.1
The Fukushima nuclear accident in 2011 had an extensiveimpact on the national electricity plans. Thispaper outlines alternative electricity scenarios thatmeet the goals of nuclear phase-out and greenhousegas (GHG) emission reduction. This paper also analyzesthe results of each scenario in respect to theelectricity mix, GHG emissions, costs and employmenteffects. The Long-range Energy AlternativesPlanning system (LEAP) model was used to simulatethe annual electricity demand and supply systemfrom 2011 to 2030. The reference year was 2009. Scenarios are reference (where existing plans arecontinued), A1, A2, B1, B2, and C2 (where the levelsof demand management and nuclear phase-out aredifferent). The share of renewable energy in the electricitymix in 2030 for each scenario will be increasedfrom about 1% in 2009 to 8% in the reference scenarioand from 11% to 31% in five alternative scenarios. Total cumulative cost increases up to 14%more than the reference scenario by replacing nuclearpower plants with renewable energy in alternativescenarios could be affordable. Deploying enoughrenewable energy to meet such targets requires aroadmap for electricity price realization, expansionof research, development and deployment for renewableenergy technologies, establishment of an organizationdedicated to renewable energy, and ambitioustargets for renewable energy.