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No artwork requires more thought to understand than that of M. C. Escher, where so many objects start as one thing and are somehow metamorphed into others. Many of the current ideas of fractals can be found in his drawings. So many "simple" games that we are exposed to have strategies that are mathematical in nature. But some, like chess, seem to defy solid mathematical analysis and show us once again how powerful the human computer really is. As the numbers of such puzzles appearing in newspapers and magazines indicates, a large percentage of the public enjoys a good mental tickler.
This collection is a distillation of those thoughts, featuring mathematical explanations of most. The works here show once again that the distinction between mathematics and the rest of the world is an artificial one put up by small minds. Mathematics is a joyous endeavor that provides more joy and frustration than any other ever imagined by intellects on par with that of humans. It is a joy to read about people doing mathematics for no other reason than recreation. It is also sad to realize that so many people who proudly wear a badge of mathematical illiteracy are so far gone that the do not realize it when they are employing mathematics in a recreational manner. For a short time, one of the best-selling books was one describing how to solve the puzzle known as "Rubik's Cube." As is explained here, the solution is based on beginning group theory.
A welcome addition to the literature, this report of the Strens conference is refreshing. For it shows mathematicians and their ilk having fun doing mathematics. To be blunt, that is something that the public simply does not understand.
Published in Journal of Recreational Mathematics, reprinted with permission.
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Being German and a German teacher and linguist for 13 years I was interested in the book my partner is learning the language with. So I went through the book and was appalled at the amount of grammatical mistakes and usage errors used in the book. The book was apparently not written by a German person, based on the type of errors I assume it was written and revised by a native English speaker.
Countless expressions and phrases are completely outdated, many have never been used and/or are simply wrong. Students learning German with this book will be ridiculed when speaking German in any German speaking country. I could not believe that a book like this does even exist for official language courses.
It has even been revised by a Mr. Robert D. Vanderslice and according to its cover "over 1/2 million copies" have been sold or issued.
To be very honest, apart from the wasted money and time people spend on a course and this book (I am sure a lot use it for self-instruction), I think it is even irresponsible to use, publish and sell this book. I will be more than happy to provide you with a list of examples of such linguistic errors and misuses of the German language.
I am presently working as a German language specialist with an international American company, and I am herewith offering you to completely revise this book for you to make it fit for the market. The way it is I can only advise you to please not distribute it any further.
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However, it did not help me to construct sentences and speak fluently.
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Fewer sophisticated viruses are released every year. The average worm or email virus that is written by some disgruntled teenager just isn't sophisticated enough to be worried about, and fewer proficient programmers are producing malicious code (the stakes are too high).
As a technically proficient person, I found the book boring and, condescending. The authors went on and on, were not concise, and didn't "reveal" anything that even a computer savvy 16 year old wouldn't already know. At the same time the confused writing, will only serve to baffle novices.
In short, I doubt the experience and expertise of the writers, and the book is poorly written. Save your money, install virus protection on your computer and keep it updated. That will protect you, this book will not.
If you want reliable information about malicious code then try:
1) Malicious Mobile Code: Virus Protection for Windows,
2) Know Your Enemy: Revealing the Security Tools, Tactics, and Motives of the Blackhat Community
3) E-mail Virus Protection Handbook : Protect your E-mail from Viruses, Tojan Horses, and Mobile Code Attacks
Viruses Revealed is one of the best computer books I have seen on the market to date. The book possess a vast array of knowledge regarding the destructive world of computers not to mention the anatomy of Computer viruses and how they work. If you are looking to protect your computer from just these destructive things (i.e. Viruses). I say, get this book. I would of gave it a 5-star rating if they only had more source code of viruses to view. Those of us out there who are Computer Programmer's would love to view the source code. Anyway, a great book to have in any computer user's library! (JC)