COMET-AR User's Manual: COmputational MEchanics Testbed with Adaptive Refinement

The COMET-AR User's Manual provides a reference manual for the Computational Structural Mechanics Testbed with Adaptive Refinement (COMET-AR), a software system developed jointly by Lockheed Palo Alto Research Laboratory and NASA Langley Research Center under contract NAS1-18444. The COMET-AR system is an extended version of an earlier finite element based structural analysis system called COMET, also developed by Lockheed and NASA. The primary extensions are the adaptive mesh refinement capabilities and a new "object-like" database interface that makes COMET-AR easier to extend further. This User's Manual provides a detailed description of the user interface to COMET-AR from the viewpoint of a structural analyst

One sided Star and Core orthogonality of matrices

We investigate two one-sided orthogonalities of matrices, the first of which is left (right) $*$-orthogonality for rectangular matrices and the other is left (right) core-orthogonality of index $1$ matrices. We obtain some basic results for these matrices, their canonical forms, and characterizations. Also, relations between left (right) orthogonal matrices and parallel sums are investigated. Finally under these one-sided orthogonalities we explore the conditions of additivity of the Moore-Penrose inverse and the core inverse

Goodness of Fit Between Children and Classrooms: Effects of Child Temperament and Preschool Classroom Quality on Achievement Trajectories

Research Findings: The purpose of this study was to examine whether child temperament differentially predicted academic school readiness depending on the quality of classroom interactions for 179 Head Start preschoolers. Teachers rated children's temperament as overcontrolled, resilient, or undercontrolled in the fall and reported on children's language/literacy and math skills continuously throughout the year. Observations of classroom emotional and instructional support were conducted in the spring. Results from multilevel models indicated that overcontrolled children (compared to resilient children) made greater math gains in classrooms with higher instructional support, whereas a trend-level effect suggested that undercontrolled children (compared to resilient children) made lower math gains in classrooms with lower emotional support. Results also showed that resilient children's gains in language/literacy were more positively associated with high emotional support than were the scores of overcontrolled children. Practice or Policy: This study adds to prior findings suggesting that overcontrolled and undercontrolled children need special attention in the preschool classroom. Teachers and administrators may want to carefully consider the effect that classroom interactions and instructional techniques have on individual children and attempt to tailor instruction to meet the individual needs of children within classrooms

Traitement d'images satellitaires de la Mediterranee occidentale pour determiner sa dynamique

Available from INIST (FR), Document Supply Service, under shelf-number : T 83750 / INIST-CNRS - Institut de l'Information Scientifique et TechniqueSIGLEFRFranc

Evaluation of Notched Strength of Composite Laminates for Structural Design

10.1177/0021998310372713Journal of Composite Materials44202381-2392JCOM