this paper is devoted to the study of products of classes of right $s$-posets possessing one of the flatness properties and preservation of such properties under products. specifically, we characterize a pomonoid $s$ over which its nonempty products as right $s$-posets satisfy some known flatness properties. generalizing this results, we investigate products of right $s$-posets satisfying condi...

For a long time, the ammoniated ruthenium oxychloride “ruthenium red” (today formulated [1, 2] as [(NH3)5 R u •O • Ru (NH3)4 O • Ru (NH3)5]6+ • Clg), has been used as a microscopic test for pectins [2, 3]. Several applications of this contrasting agent for electron microscopic detection of acid polysaccharides and proteoglycans have been stud­ ied [4-10]. Its use as a Schiff-like reagent was re...

In this paper we calculate the volumes and energies of formation of Schottky defects in the alkali halides NaCl, NaBr, KC1 and KBr. Both the polarisable point-dipole and a simple shell model are evaluated. The calculation uses a generalised and extended Mott-Littleton approach in conjunction with results derived previously by the lattice statics method of Kanzaki. The polarisable point-dipole m...

Developing multimedia applications, such as video and audio applications, is a diicult task because of the stringent requirement on system resources and the great diversity of multimedia standards and devices. Many existing multimedia systems are monolithic and extremely complex. It is hard to extend and reconngure those systems. Easy exten-sibility and reconngurability is desirable since multi...

Parallel execution offers a solution to the problem of reducing the response time of object-rela-tional queries against large databases. A database management system answers a query by first finding a procedural plan to execute the query and subsequently executing the plan to produce the query result. In this thesis we address all significant levels of the query processing architecture in order...

THE demonstration and descrip tion of effectiveness are principal concerns of every curriculum evaluation. The evalu ation designs constructed and used b> I'^e experimental curriculum developers to ac complish these purposes assume mony ^r,d varied modes. Examples of this variability are observable in the published literature describing experimental science curriculum projects such as the Ameri...

In this thesis, we investigate the computational complexity of optimizationproblems involving a “diffusion process” in a graph. More specifically, we are first inter-ested to the target set selection problem. This problem consists of finding the smallest setof initially “activated” vertices of a graph such that all the other vertices become activatedafter a finite number of prop...

Actuation schemes exist that permit the joint manage ment of air and fuel ow into the cylinders of a spark ignition engine With the exception of drive by wire systems to date the transient control aspects of these schemes collectively refered to here as secondary cylin der air ow actuators has not received any attention from the control community This paper takes a rst step in the analysis of t...

SUMMARY In a continuing search for unique karyotypic changes in human leukemia and cancer, investigators have encoun tered a number of patients in whom partial trisomy and longitudinal duplication of some chromosomal regions, both involving especially the long arm of Chromosome 1, and isochromosomes were present. These abnormalities were also observed by us in human phytohemagglutinin stimulate...

SUMMARY An exceptional Burkitt lymphoma patient, a 16-year-old boy, yielded tumor biopsy cells and derived tissue culture lines that displayed a strong surface accumulation of IgM heavy and kappa light chain specificities judged by direct membrane fluorescence and cytotoxicity tests. This property was main tained unchanged in the course of more than 5 months of serial passage in vitro. A fourth...