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A comprehesive delight! Many advanced topics, including sophisticated atomic stucture, presented in language that good students will appreciate! We purchased this book and World of Physics for our AP prep studies and debate teams. Both are excellent. Frank H. Stevens, M.Ed.
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There are also good explanations of hard-to-understand modern theories such as Einstein's relativity theory and articles on atomic/quantum physics. There are many biographies that contain information not available elsewhere.
This is a very good addition to any library -- or bookshelf of anyone interested in science. JK Fran, Ph.D Houston, Texas.
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Gale's synthesis of material is creative. He includes the story of the Anasazi of the American southwest, the Viking settlement in Greenland and others when discussing the impact changing climactic conditions have had on humans in the past. The author includes profiles of scientists who theorized and then later documented the greenhouse effect (such as Svante Arrhenius) as well as the entrepreneurs whose inventions have contributed significantly to the problem (such as Ford).
The author addresses the issue of why the earth experienced a slight cooling trend from the 1940s to the early 1970s, prior to the more recent period of steadily rising temperatures: the period in question witnessed twice the normal amount of volcanic activity, which helped block sunlight from reaching the earth.
The evidence cited by the author strongly suggests that the earth is warming due to human activity. Yet, Christianson inexplicably accords the well-known greenhouse skeptic Fred Singer's criticisms of greenhouse theory more respect than this coal and oil industry-funded mouthpiece deserves. If the author did this in order to appear objective, he did so at the cost of confusing corporate propaganda with real science.
In fact, my criticism of the book is that it contains precious little analysis. Christianson is a gifted storyteller, and no doubt many will enjoy his entertaining narrative. But the reader who seeks insight and understanding into why our society privileges technology at the expense of nature will need to look elsewhere.
Still, I think Christianson has succeeded in his mission of writing a great book for the general interest science reader. It should help further the cause of making the science of global warming an increasingly popular topic of conversation in our society.
And the last chapter of the book details why it is so necessary for government to be responsive and take a leadership role in caring for what we have left of our great inheritance of land, air and water.
I loved the fascinating history of our planetary environment from back in the 18th and 19th century when men were sure that the answer to bad air was simply building a taller smokestack, all the way to Kyoto, where the Oil companies, in tandem with Republican Congressonal majority maneuvers, tried to sabotage any efforts at cleaning up the environment, and largely succeeded.
Now all we have left are the powerful forces of greed: Big Oil and Chemical money (read how they pandered scientists to join them against the Kyoto accords) against the fishes, the animals, the trees, and the health of humanity and our children and grandchildren. How can fish fight Big Oil company money and the politicians they control?
I fear for our planet. We are on a slippery slope and big money--the attitude of "get yours and get out" may carry the day.
"Nature never deceives us. It is always we who deceive ourselves." Rousseau
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I took all of the six tests (about 30 minutes each) which score your business, clerical, logic, mechanical, numbers, and social aptitude. You are required to stay within the time limit (if you want an accurate result). You are supposed to keep in mind your highest 2 or 3 scores and then look at the categories that they correspond with.
For example, I scored very superior in three areas: Clerical, Logic, and Numbers. I then looked at the CLN category to see what jobs I have the aptitude for. I was happy to see that some of the jobs they listed were ones that I was at least marginally interested in. I then looked at similar categories, like LN, CL, and CN...and some of those careers also looked appealing. My lowest score was also the category that was less appealing to me (although it was a category I'd have considered as a younger person.)
While this book does not profess to give definitive answers on what you should do, it would be a nice guide for someone who has NO idea what they'd be good at (note: this does not measure interest, just aptitude) or for someone like myself who'd like affirmation or redirection.
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I remember two other negative reviews that were removed.
Oh well....I am simply writing this to guide people like myself...
I made a BIG mistake buying this book.
I have read a number of Jyotish books including books written by Indian authors. I would not recommend you to buy this book.
Its not good at all. Mostly just a mechanical reproduction of some principles without explaining them properly.
The main thing that bothered me was that the author has not shown the use of navamsha at all. Most astrologers in India
dont even start analysing unless they see the navamsha also.
In other words, your predictions will be incorrect if you use this book. If you are a beginner read, "Light On Life by Hart Defaouw" . Its the best for beginners!
After reading "Light on Life" , read "Elements of Vedic astrology 1 & 2 by Dr.Charak". The book by Dr.Charak is one of the most comprehensive book in English (other than classical texts).
Point is that there are numerous great Pandits and scholars
who have written books on astrology and these books are a thousand times better than this one.
Thats my frank opinion.....
(Dr.Parihar)
This garbage is not worth owning. The writer is borderline insane. His ideas are that boxing is the only way to fight, and his broken English is next to impossible to follow. The author or his representitives are online over on Yahoo and plague the clubs with SPAM and obnoxious posts even after being asked to stop repeatedly. The material that we have viewed is poorly made and the instruction is of very poor quality. You would be better off going to a third grade playground and learning to fight from the class bully. Do yourself a favor and do not waste your money on these books. He has further made reference that America deserved the attack on the 9/11. I would not give this man ANY American money.
However the author makes a big mistake by mixing an theoretical, mathematical calculation model and the 3D airflow around a finite wing. Real air does not circulate like the author shows on page 129. Its impossible for the real airflow to pass TE that way.
The Circulation on page 111 Figure 8.7 Biplane Circulation Interference, would make the big frontfan on Boeing 777 GE90 engine work very bad in a real world airflow.
I have always been taught, that the mathematical applied Circulation around a wing in a "perfect, hypotetic, non existing fluid" only was superpositioned to adjust the physical unreal Potential calculated flow field showed on page 43, Figure 3.7 A Concept of Non-viscous Flow Passing an Airfoil.
From 1754-1904 The Potential calculated flowfield could not be corrected to look like real fluid flow Field until a mathematical superpositioned Circulation flowfield was invented And applied.
The mistake the author also makes is to say the all wings are infinite and all airflow thereby will be 2-dimensional and upwash will be equal to the downwash.
The Circulation in real air is spanwise, not flowwise like the author writes.
Where I live I can see and hear every morning how Bae146 flies over at 800 feet. After some 50 seconds "the wake turbulence"= (wingtipvortices and the downwash from the wing together) comes down to the ground, hitting my hat. But there is no upwash lifting my hat before the aircraft arrives.
If I make a quickroll and fly inverted, what happens to the direction of the Circulation? The mixing of Calculation Theory Models and real air behavior is very common in many books, especially in the US.
I hope that the author in the next edition of the book, changes his Lift explanation to a physical more real one, explaining how "pressuregradients" are created by centrifugal forces and how these pressuregradients "sucks" in air from higher pressure regions.
A wing is just an airflow deflector. A Sail makes the same for a boat. By disturbing the free airstream (changing it's direction) pressure gradients appear.
This reader concurs with the review provided by Erik Zapletal from Maroota, Australia. It is complete, factual and extensive, and favors Newtonian based aerodynamics teaching. However, some of the other reviews are not accurate, and deserve comment. A few reviewers have not really read the book, are incapable of understanding it, or are prejudiced with vested interest. Richard Asher's review has mostly only vague generalities, with only one specific but erroneous statement-- that the author claims Bernoulli's laws are contradicted by Newton's laws. In fact, the author derives Bernoulli's equation from Newtonian principles, beginning on page 139. Asher should have found this if he really read the book. Also, beginning on page 129, the lift equation is derived logically and methodically from Newtonian principles, producing exactly the same result as classically derived from Bernoullian considerations. Contrary to Asher's claim, these derivations confirm agreement between Newtonian and Bernoullian concepts.
The Scott Johnson review, applauded by Asher, and the Jan-Orlov and Jeff Noall reviews, deny the reality of circulation, claiming it to be a fiction of classical aerodynamics for mathematical purposes. Although the classical explanation of how circulation is produced is fictional, the circulation is in fact real, as Newtonian principles and common sense demand. Reacting to force of pressure difference, air ahead of a lifting wing accelerates upward around the leading edge, away from higher pressure below and toward lower pressure above. This upward movement is the basis of stall warning systems. Above the leading edge, air accelerates rearward into reduced pressure, while below the leading edge air accelerates forward, away from increased pressure. Behind the wing, air following the surfaces is left with downward movement. Thus instantaneous air movements occurring in still air around a passing wing include upward movement ahead, downward movement behind, rearward movement above and forward movement below. Overall, this movement is of circulatory nature around the wing, and is appropriately referred to as "circulation." Pitot instrumentation evidence on page five of the book supports circulation as fact. The classical explanation, using fictional induction to explain circulation, rather than Newtonian principles of force, mass and acceleration, apparently leaves Asher and others believing circulation is not real.
Aerodynamics must be treated open-mindedly as science, not as dogma or unquestionable religion. The most popular layman-level theory of wing operation, religiously taught to pilots and public school students for about 100 years, falsely claims transit time of flows above and below a wing must be equal. This, if true, would require flow over a curved upper surface to be faster than that at a more flat, and therefore shorter, lower surface. Hence, Bernoulli's law would require pressure above to be less than that below so as to produce lift. Indeed upper surface flow is faster, but much faster than equal transit time would require or even permit. This most popular but false teaching of lift is an abuse of Bernoulli's law. That abuse is alluded to in the book title.
Clearly this person has not really read the book. There is no such claim. The author only demonstrates that wing operation can be described in Newtonian terms without involving Bernoulli. This in no way suggests Bernoulli's law is wrong.
Asher also complains vaguely about the mathematics. In the book the lift equation is produced from Newtonian momentum considerations, rather than from Bernoulli. The result coincides precisely and logically with the derviation involving Bernoulli. Without proper mathematics, and physics, this result would be quite improbable.
Mr. Asher is the second "expert" to publish a pompous and erroneous review after perhaps glancing through the book and finding it contains material beyond his understanding.