Implementation of the operations research/management science process

The aim of this article is to point out some basic aspects of the OR/MS implementation problem and to outline a frame of reference for dealing with the OR/MS process. The model proposed includes a decomposition of the OR/MS process. Phases, interest groups, strategies, and variables in the OR/MS process are considered as being important. The first part of the article is a summary of some important recent contributions by others, whereas the second part represents contributions resulting from the author's own research.     

Chelate von β-dicarbonylverbindungen und ihren derivaten : Teil L. Die extraktionsphotometrische bestimmung von zink und wismut mit thiodibenzoylmethan

Thiodibenzoylmethane is suitable for the extraction-photometric determination of traces of zinc and bismuth. The method is satisfactory in glycine-buffered solutions at pH 12.6 Interfering metal ions are masked by diethanolamine-dithiocarbamate in the determination of zinc and by cyanide in the case of bismuth; many foreign ions can be tolerated in more than 100-fold amounts     

Alpha and gamma spectrometry for waste management studies

Automated alpha and gamma spectrometry systems have been fabricated to analyze large numbers of samples in batches and to perform on-line analysis for a number of experiments concurrently. Specially designed sample changers for alpha and gamma spectrometry and gamma scanners for used fuel and in-situ glass leach experiments have been built. These communicate through digital interfaces, microprocessors, microcomputers and programmable controllers to a Nuclear Data model ND6700 computer/spectrometer. Application software for data entry and reports has been written to interact with Nuclear Data software to pemit easy and efficient operation.     

Deuterium and Impurity Flux Measurements in the Boundary Plasma of T-10

Time resolved measurements of deuterium and impurity fluxes in the boundary layer of T-10 tokamak were carried out using carbon strips as deposition probes. Analysing these probes by RBS and ERD deuterium impact energies of 25–40 eV could be estimated from the saturation behaviour of deuterium in carbon. The high impurity concentration level and it's time behaviour give indications for local impurity producing sources playing an important role for the impurity transport in the near wall plasma.     

Zum Randverhalten der Lösungen gewisser zweidimensionaler Variationsprobleme mit freien Randbedingungen

Ohne Zusammenfassung     

Information in the operations research process

The article deals with information in the OR process. The value of an ‘optimal’ model solution which is not implemented is not very high. Many errors are due to a too narrow formulation of the problem, often a formulation which has focused on purely technical and economic aspects, or a formulation which has been adapted for a standard model. The concepts and models treated in the article take their point of departure in the actual problem. The models can be used as a frame of reference by various individuals and groups which are involved in OR work.     

On variational problems with obstacles and integral constraints for vector-valued functions

The authors prove existence and regularity for vectorvalued solutions of n-dimensional variational problems with boundary conditions, integral constraints, and obstacles as side conditions. Main emphasis is given to the regularity proof in the case n=2 generalizing a well known technique due to C. B. Morrey. In addition, a regularity result is stated for the general n-dimensional case.Dedicated to Hans Lewy and Charles B. Morrey, Jr.