An-Najah Blogs :: Dr. Hussain M. Alayan An-Najah Blogs :: Dr. Hussain M. Alayan en-us Wed, 20 Sep 2017 21:17:51 IDT Wed, 20 Sep 2017 21:17:51 IDT Electronic structure of GaxIn1-xAsySb1-y quaternary alloy by recursion method ArticlesThis work reports the electronic structure of GaInAsSb quaternary alloy by recursion method A five-orbital sp3s per atom model was used in the tight-binding representation of the Hamiltonian The local density of states LDOS integrated density of states IDOS and structural energy STE were calculated for Ga In As and Sb sites in Ga05In05As05Sb05 and GaInAsSb lattice matched to GaAs and the same alloy lattice matched to GaSb There are 216 atoms in our cluster arranged in a zincblend structure The results are in good agreement with available information about the alloyPetri-Net Modeling of Production Lines Containing Robots ArticlesAbstract: This paper introduces Peri-Net models of robots for the analysis and design of robot implemented production lines Petri-Nets are ideal for describing systems with flow of information or products and hence natural for production linesThey also allow for treatment alt different levels of complexityFor production lilies implemented by robots we introduce different levels of robot models which can be used in any configuration such as ring protected ring lattice or lineal lines These models allow the determination via Petri-Nets of such things as throughput Economic Evaluation for Hard Automation Networks ArticlesAbstract Hard automation networks are defined and hard automated manufacturing network configuration of interest to full automated manufacturing of Gardner is presented with regard to their suitability to production process The analogy of the performance of these topologies in terms of cost cost effectiveness and comparative economic analysis to different types of manufacturing is presented with respect to robot networks software and hardware performance resultsProcessor Requirements for Reliable PCB Repair Via Robots in an Automated Test Center ArticlesABSTRACT: In this paper the feasibility of using robots for printed circuit board PC3 automated repair AR is discussed A technique is given where by robot PCB repair stations can be incorporated in the PCB automated integrated manufacturing AIM systems of Gardner and various requirements on the robots operating in such a system are discussed Expressions are developed for the processor requirement to achieve a specified reliability of each operation within an operational area of Gardner useful in automated test center and repair ATCR Bianary Petri-Net Relationships ArticlesAbstract: A full set of equations describing binary Petri-nets is presented in terms of integer algebra In doing this an equation is developed that allows for determination of the firing vector in terms of the markings and the input Because the results are expressed in terms of integer arithmetic rather than Boolean algebra they allow for extension to other classes of Petri-nets as well as yield ease of programming for Petri-net analysisPetri-Net Robot Models for Robot Networks Articles Abstract: This paper introduces Petri-Net models of robots for the analysis and design of robot networks Several levels of robot models are introduced The simplest meaningful model is a two-transition four-place one which can be used for quick executive-modeling for first or quick designs Beyond this a detailed technician level model is introduced which can model fine points of the robot operation The state equations for these models are given and application to networks of robots illustrated by the modeling of a ring networkCalculation of Curvature for Robot 3D Curve Determination ArticlesAbstract: An algorithm is given for calculating the curvature of 3-dimensional curves from measurements made along the curve by a robot desiring to determine the curve It is well known that such curves are fixed by their curvature and torsion parameters measured in terms of the arc length along the curve We have shown [1] that these parameters form a convenient characterization for use by robots especially since the curvature and torsion can nicely be evaluated in terms of local Euler angles However in making such evaluations it becomes necessary to correctly position the normal vector which in turn determines the curvature the latter being the reciprocal of the radius of the oscillating circle at a given point [2 p 101] In this paper we develop an algorithm for positioning this normal and for evaluating the oscillating circles radius using the vector analysis formulation developed in [2] [1] R W Newcomb and D Panagiotopoulos Equations for Robot 3D Curve Determination Decisions Proceedings of the 22nd IEEE Conference on Decision Control Vol 3San Antonio December 16 1983 pp 1222 - 1223 [2] I D Faux and M J Pratt Computational Geometry for Design and Manufacture Ellis Horwood Ltd Chichester 1979Processor Requirements for Reliable Automated Manufacturing Robot Networks ArticlesAbstract: A review is first made of the basic graphs of interest to automated manufacturing using networks of communicating robots These graphs are then evaluated in terms of relative processor and processor related hardware needs for each type of basic robot network to achieve a specified reliability from which relative costs and cost effectiveness results are obtained