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박종열,김정애 대한수학회 2005 대한수학회지 Vol.42 No.6
In this article we prove the existence of the solution to themixed problem for Euler-Bernoulli beam equation with memorycondition at the boundary and we study the asymptotic behavior ofthe corresponding solutions. We proved that the energy decay withthe same rate of decay of the relaxation function, that is, theenergy decays exponentially when the relaxation function decayexponentially and polynomially when the relaxation function decay polynomially.
Three Step Iterative Algorithms for Generalized Quasivariational Inclusions
박종열,정재욱 대한수학회 2004 대한수학회보 Vol.41 No.1
In this paper, we suggest and analyze some new classesof three step iterative algorithms for solving generalizedquasivariational inclusions by using the properties of proximalmaps. Our results include the Ishikawa, Mann iterations forsolving variational inclusions(inequalities) as special cases. Theresults obtained in this paper represent an improvement andsignificant refinement of previously known results [3, 5-8, 10,14-18].
Optimal control problems for the semilinear second order evolution equations
박종열,박선혜 대한수학회 2003 대한수학회지 Vol.40 No.5
In this paper, we study the optimal control for the dampedsemilinear hyperbolic systems with unknown parameters(C(t)y')'+A_2(t,q)y'+A_1(t,q)y=f(t,q,y,u).We will prove the existence of weak solution of this system andis to find the optimal control pair (bar{q},bar{u})inQ_{tau}times {mathcal U}_{ad} such that inf_{uin {mathcalU}_{ad}}sup_{qin Q_{tau}}J(q,u)=J(bar{q},bar{u}).
朴鍾烈 慶尙大學校 1975 論文集 Vol.14 No.-
In order to investigate the optimum sowing date and seed yielding capacity of some valuable ground vegetation for the benifits of the establishment of seed farm, 12 different sowing dates with 10-15 days of intervals from beginning March 30 to October 18 were projected and seed yield capacities in each sowing date were examined. The results are summarized as follows. 1. The limited sowing date for both A. hilta and L. cuneata was estimated the date before May 30, for the seed production, while D. glamarata produced no seeds with in the trial year. 2. Highly significances of seed yield of A. hilta and L. cuneata were found between the different sowing dates and the maximum seed yield in the plot of the recording 72.9g, 87.4g for A. hirta and for L. cuneata. 3. Vegetative growth was inhibited when sowed later then July 1 for grasses except L. cuneata.