Browsing Mathematical Sciences by Issue Date
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Superhyperfine interactions in the electronspinresonance spectrum of substitutional gd3+ impurity in caf2 single crystals under applied stress
(19670703)In this communication we report a superhyperfine structure in the esr spectrum of 0.001 at. ~0 Gd' in a single crystal of CaF, under applied stress. The stress was applied at the polished (111)face of the CaF, crystal ... 
Mössbauer measurements with Au197 in AuAl2, AuGa2, AuIn2, and AuSb2
(19750301)Mossbauer spectra for '"Au in Au metal and the intermetallic compounds AuAl„AuGa„AuIn„and AuSb2 have been obtained for the temperature range 4.2 to 95'K. The isomer shifts for these absorbers with respect to a ' Au in ... 
Activity coefficient and the Einstein relation
(19830715)A connection between the activity coefficient of current carriers and the Einstein relations is established by two methods, one based on normal semiconductor concepts and one based on irreversible thermodynamics. The ... 
ON FINITE ELEMENT METHODS FOR THE EULERPOISSONDARBOUX EQUATION.
(198412)We deal primarily with the derivation of various convergence estimates for some semidiscrete and fully discrete procedures which might be used in the approximation of exact solutions of initialboundary value problems with ... 
On a multichannel transportation loss system with controlled input and controlled service
(1987)A multichannel loss queueing system is investigated. The input stream is a controlled point process. The service in each of m parallel channels depends on the state of the system at certain moments of time when input and ... 
On a duality principle in processes of servicing machines with double control
(1988)This paper examines a doubly controlled process of servicing machines. The classical system treated by Takács is equipped with m+1 unreliable machines served by one repairman. In the present modification of this model, the ... 
On a multichannel queue with state dependent input flow and interruptions
(1989)This paper deals with a multichannel queueing system with a finite waiting room but without losses. The latter is achieved by a temporary interruption of the input flow activity until the waiting room is ready to place a ... 
Error Bounds for Two Even Degree Tridiagonal Splines
(1990)We study a C(¹) parabolic and a C(²) quartic spline which are determined by solution of a tridiagonal matrix and which interpolate subinterval midpoints. In contrast to the cubic C(²) spline, both of these algorithms ... 
Strong Maximum Principles for Parabolic Nonlinear Problems With Nonlocal Inequalities Together With Integrals
(1990)In [4] and [5], the author studied strong maximum principles for nonlinear parabolic problems with initial and nonlocal inequalities, respectively. Our purpose here is to extend results in [4] and [5] to strong maximum ... 
Asymptotic Optimality of Experimental Designs in Estimating a Product of Means
(1990)In nonlinear estimation problems with linear models, one difficulty in obtaining optimal designs is their dependence on the true value of the unknown parameters. A Bayesian approach is adopted with the assumption the means ... 
Existence and Uniqueness of Solutions of Nonlocal Problems for Hyperbolic Equation uxt=F(x, t, u, ux)
(1990)The aim of the paper is to give two theorems about existence and uniqueness of continuous solutions for hyperbolic nonlinear differential problems with nonlocal conditions in bounded and unbounded domains. The results ... 
A Theorem on Many Fixed Points for Nonlinear Operator
(1990)Multiple fixed points of weakly inward mappings are investigated by means of ordinary differential equations in abstract spaces. 
On some queue length controlled stochastic processes
(1990)The authors study the input, output and queueing processes in a general controlled singleserver bulk queueing system. It is supposed that interarrival time, service time, batch size of arriving units and the capacity of ... 
A singleserver queue with random accumulation level
(1991)The author studies the queueing process in a singleserver bulk queueing system. Upon completion of a previous service, the server can take a group of random size from customers that are available. Or, the server can wait ... 
On a singleserver queue with fixed accumulation level, state dependent service, and semimarkov modulated input flow
(1991)The authors study the queueing process in a singleserver queueing system with state dependent service and with the input modulated by a semiMarkov process embedded in the queueing process. It is also assumed that the ... 
Error estimates for the semidiscrete finite element approximation of linear nonlocal parabolic equations
(1991)Existence and uniqueness are proved for nonlocal (in time) for solutions of linear parabolic partial differential equations. Instead of an initial condition, there is a relation connecting the initial value to values of ... 
Unique Solution to Periodic Boundary Value Problems
(1991)Existence of unique solution to periodic boundary value problems of differential equations with continuous or discontinuous righthand side is considered by utilizing the method of lower and upper solutions and the monotone ... 
On Modulated Random Measures
(1991)In this paper the author introduces the notion of a modulated marked random measure, Zξ on the class of locally compact and σcompact spaces with countable bases. As special cases, are marked processes modulated by ξ are ... 
A first passage problem and its applications to the analysis of a class of stochastic models
(1991)A problem of the first passage of a cumulative random process with generally distributed discrete or continuous increments over a fixed level is considered in the article as an essential part of the analysis of a class of ... 
On a first passage problem in general queueing systems with multiple vacations
(1992)The author studies a generalized singleserver queueing system with bulk arrivals and batch service, where the server takes vacations each time the queue level falls below r(≥1) in accordance with the multiple vacation ...