This paper describes an analog computer simulation of a manned orbital docking system conducted as a fe~sibility study. In addition to determining the possibility of a human operator performing guidance and attitude control functions with a minimum amount of displayed information, additional purposes of the study were to determine (1) terminal values of range rate, line-of-sight (LOS) angle, LO...

As stated in the previous section, thermal excitation of Goldstone modes destroys spontaneous order in two dimensional models with a broken continuous symmetry. The RG study of the non-linear σ-model confirms that the transition temperature of n-component spins vanishes as T ∗ = 2πǫ/(n − 2) for ǫ = (d − 2) → 0. However, the same RG procedure appears to suggest a different behavior for n = 2. Th...

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...