The essential work of fracture through the wall of uPVC pipe

The specific essential work of fracture, w(e), has been measured for a relatively thick walled uPVC pipe as a function of position through the wall of the pipe. w(e) was highest at the surface of the pipe and decreased significantly at the centre of the pipe wall. The variation in w(e) through the wall of the pipe correlated with the processing level of the uPVC material as measured by the critical temperature, T-c. The variability in the measured values of w(e) was substantially higher in the centre of the pipe where the processing levels were lower. This was likely to be a result of the variability in the microstructure of the material where poor processing had introduced regions of poor fusion of primary PVC particles. (C) 2002 Kluwer Academic Publishers.

From snowflakes to sandcastles : a child's year in words and pictures. 'De los copos de nieve a los castillos de arena : un curso de palabras y dibujos'.

Imágenes en miniatura ilustran las doce palabras que describen cada mes del año y van acompañadas de preguntas para animar a los niños a buscar y encontrar los distintos objetos que están en la otra página, ilustrada con las imágenes de los objetos antes mencionados. El nombre del mes aparece en la parte superior derecha de cada página seguido de una lista de objetos que no siempre tienen una conexión lógica con el mes.

30 years of teamwork for children : a history of the Illinois Commission on children /

"Mrs. Edwin Eisendrath's written material from 1951 to 1954."

Degree programs at private higher education institutions in Illinois.

"July 1980."

Growing older in Illinois : needs, challenges, opportunities.

"This report was written by the Heartland Center on Aging, Disability and Long Term Care, School of Public and Environmental Affairs, Indiana University and the National Center for Senior Living, South Bend, Indiana. May, 1991." Acknowledgements.

Illinois jails : standards compliance assessment.

Cover title.