pp 391-391 Editorial
pp 394-394 Science Smiles
pp 395-400 General Article
Steven Vogel was a pinoneer in applying principles of mechanics to diverse living systems. This article first provides a brief overview of his career. It then reviews the concepts of P´eclet number and Reynolds number which are helpful in appreciating the Classics article by Vogel reproduced in this issue.
pp 401-415 General Article
A computing grid interconnects resources such as high performancecomputers, scientific databases, and computercontrolledscientific instruments of cooperating organizationseach of which is autonomous. It precedes and is quitedifferent from cloud computing, which provides computingresources by vendors to customers on demand. In this article,we describe the grid computing model and enumerate themajor differences between grid and cloud computing.
pp 417-427 General Article
Some schools in the neighbourhood of Sefako MakgathoHealth Sciences University (SMU) in South Africa persistentlyyielded poor mathematics results in the past years. Thiswas of concern since maths is the main subject for manyopportunities, including admissiontoSMUstudy programmes.Some SMU maths lecturers partnered with local schools toprepare the students in these schools. The aimwas to improvemaths teaching and matric maths results. The teachers wereassisted with maths concepts of most difficulty. This articledescribes the initiatives by some academics of SMU in achievingthis.
pp 429-437 General Article
We discuss some errors in The Feynman Lectures on Physicsrelated to the concept of symmetry.We also suggest a possiblecorrection to Fig.1.4 of Vol. I. The discussion may be usefulfor students of crystallography, solid state physics and solidstate chemistry.
pp 439-446 General Article
It is well known that the set C[0, 1] of real-valuedcontinuous functions on the closed interval [0, 1]has a natural ring structure. Its maximal idealsare known to be points. Here we show thatalthough there exist prime ideals which are notmaximal, the zero set is again a singleton. In particular,each prime ideal is contained in a uniquemaximal ideal.
pp 447-452 General Article
Newton’s theory of gravitation solvedmany problemsof celestial mechanics but led to some majorproblems, one of which was that it gave rise toa serious paradox discussed in this article. Theparadox has a number of manifestations one ofwhich is presented here. It should be rememberedthat the root cause of all these paradoxes isfundamentally the same. Laplace attempted anad hoc solution. However, it could not be mathematicallydemonstrated that his proposal solvesthe difficulty. In this article, it is shown that hissuggestion removes the problem. A physical phenomenonthat can justify Laplace’s suggestion isalso mentioned briefly. This article also posesan interesting mathematical problem that can beattempted by interested readers. The computationalsolution is presented here.
pp 453-456 Classroom
The demonstration described in this article is to show thatwhile H$_2$O ice floats in water, D$_2$O ice sinks in water, provingthe higher density of ‘heavy water’. This experiment can bedone in a classroom or in an auditoriam.
pp 457-465 Classroom
Using an electrical component like a relay, the phenomenonof self inductance caneasily be demonstrated to undergraduatestudents. By wiring simple electrical components like relay,neon bulb and a DC power supply, intermittent backelectromotive force (emf) can be generated in the range from60 to 100 volt. The glowing of neon bulb provides visualevidence for the generation of large back emf due to selfinductance.
pp 467-471 Book Review
pp 473-487 Classics
pp 489-489 Flowering Trees