Drop the chalk

Chalk in the prime.

After observations of cloudiness in the perfusion circuit at open intracardiac operations, laboratory experiments showed a precipitate in a Hartmann's solution (compound sodium lactate solution, Ringer-lactate) and sodium bicarbonate based priming fluid used for cardiopulmonary bypass. The precipitate was found to consist of calcium carbonate crystals. The crystals were not dissolved by adding ...

My word Colored chalk

On the first day of teaching a new class I carry with me a stack of paper syllabi and a new box of colored chalk — each pink, yellow, green, purple, orange and blue stick unblemished and whole, ready to be eroded and broken in the service of teaching neuroscience. My teaching assistants carefully post the syllabus on the web, and even more carefully update it to accommodate my inability to stic...

Chalk tracer test study

A parameter identifiability study of two chalk tracer tests S. A. Mathias, A. P. Butler, T. C. Atkinson , S. Kachi, and R. S. Ward Department of Civil and Environmental Engineering, Imperial College London, London SW7 2AZ, UK Department of Earth Sciences, University College London, London WC1E 6BT, UK School of Environmental Sciences, University of East Anglia, Norwich NR4 7TU, UK now at: Insti...

E-Chalk Technical Description

E-Chalk is a software system for both classroom teaching and distance learning. Our philosophy is to provide a tool which enhances classroom teaching and provides distance education as a side effect, i. e. at no extra cost. E-Chalk is based on the blackboard metaphor, which has proven to be an ideal teaching tool since the Ancient Greeks. The software has been entirely written in Java, so that ...

The Mass Compressibili'iy of Fractured Chalk