Flat pack interconnection structure simplifies modular electronic assemblies

Flat pack interconnection structure composed of stick modules simplifies modular electronic assemblies by allowing a single axis mother board. Two of the wiring planes are located in the stick module, which is the lower level of assembly, with the third wiring plane in the mother board

Folded stick module

Integrated circuit modules can be compactly assembled into short-run complex electronic assemblies by mounting them on a Stick module. This module provides a method of high-density packaging for industrial operations that require the fabrication of compact circuitry configurations

Packaging of electronic modules

Study of design approaches that are taken toward optimizing the packaging of electronic modules with respect to size, shape, component orientation, interconnections, and structural support. The study does not present a solution to specific packaging problems, but rather the factors to be considered to achieve optimum packaging designs

Teacher perceptions of change : an evaluation of the network for educator effectiveness system

"May 2014."Dissertation Chair: Dr. Robert L Watson.Includes vita.The purpose of this study was to examine teachers' perceptions of change impacted by the Network for Educator Effectiveness teacher evaluation system as presented by the University of Missouri. The study gathered teachers' perceptions of the impact NEE had on their teaching, specifically noting changes in teaching practice. This information served as an evaluation of the program and will be used to guide its further development. The study was guided by the following research questions. What are teachers' perceptions of change impacted by the Network for Educator Effectiveness based on the framework presented by Kim Marshall? Specifically, what changes have been made as a result of the mini-observations, unit of instruction evaluation, professional development plan, and student survey data? Data for the study was collected through focus group interviews and surveys. The population included two small southwest school districts in Missouri that had implemented the NEE system. An interpretive analysis of data was done to make the following conclusions. The mini-observation piece has affected the most change in classroom instruction. The unit of instruction evaluation, professional development plan and student survey data have affected little change due to incomplete or improper implementation. It is recommended that the NEE system continue with further implementation to see a greater effect on change.Includes bibliographical references (pages 124-133)

Comment on Ricci Collineations of Static Spherically Symmetric Spacetimes

We present a counter example to a theorem given by Amir {\em et al.} J. Math. Phys. {\bf 35}, 3005 (1994). We also comment on a misleading statements of the same reference.Comment: 4 pages,LaTex fil

Ricci Collineations for Non-Degenerate, Diagonal and Spherically Symmetric Ricci Tensors

The expression of the vector field generator of a Ricci Collineation for diagonal, spherically symmetric and non-degenerate Ricci tensors is obtained. The resulting expressions show that the time and radial first derivatives of the components of the Ricci tensor can be used to classify the collineation, leading to 64 families. Some examples illustrate how to obtain the collineation vector

Experimental investigations related to ionospheric probing, Part 1 Final report

D region simulation by ultraviolet photoionization of nitric oxid

On the general structure of Ricci collineations for type B warped spacetimes

A complete study of the structure of Ricci collineations for type B warped spacetimes is carried out. This study can be used as a method to obtain these symetries in such spacetimes. Special cases as 2+2 reducible spacetimes, and plane and spherical symmetric spacetimes are considered specifically.Comment: 18 pages. Version accepted for publication in JM

Spacelike Ricci Inheritance Vectors in a Model of String Cloud and String Fluid Stress Tensor

We study the consequences of the existence of spacelike Ricci inheritance vectors (SpRIVs) parallel to $x^a$ for model of string cloud and string fluid stress tensor in the context of general relativity. Necessary and sufficient conditions are derived for a spacetime with a model of string cloud and string fluid stress tensor to admit a SpRIV and a SpRIV which is also a spacelike conformal Killing vector (SpCKV). Also, some results are obtained.Comment: 11 page