Showing posts with label physics. Show all posts
Showing posts with label physics. Show all posts

There Are No Electrons: Electronics for Earthlings Review

There Are No Electrons: Electronics for Earthlings
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There Are No Electrons: Electronics for Earthlings ReviewI just recently finished reading this book. The motivation for reading this book was, ofcourse, to learn electronics, both analog and digital, and to ultimately be able to build out ideas that I have floating in my head for the last several years.
The cover of this book caught my eye, and flipping through the pages, I could tell the book was definitely not dry. But was it good? I looked up some of the reviews and all of them were positive from some more reputable sources: National Public Radio/ Car Audio and Electronics / Science News / Radio Electronics Magazine. So I decided to purchase the book.
This book introduces basic concepts of eletronics by use of analogies; imagery of little green men, chickens, and magicians to get his points across. Amdahl was impressed that his children could comprehend the entire Star Wars universe after watching the movie for 2 hours, and he figures he could do the same with electronics.
Usually the format goes, introduce a theory with the usual electron jargon, translate the jargon into a story about Greenies who want to party. Repeat a few times, then review the last few sections with a story about Greenies and electron jargon.
The concepts learned are pretty basic. It doesn't get into much detail, or formulas except for the two basic ones where a component is in series versus in parallel. Semi-conductors are covered.
The stories themselves are somewhat entertaining. And they help you *some what* remember the concepts you learned. Amdahl has borrowed a concept used by mnemonics.
However, the stories can be quite long. Some sections have five pages worth of stories to go through, and none of it has to do with electronics, or analogies. Just pure entertainment. I'd rather he just make analogies, and keep the narrative to the minimal. Remember, the more unusual, the better remembered, and to have a long narrative in a story helps make the bizarre imagery rational, thus losing it unusualness.
The stories themselves with the electronics makes this book -for me- worth 3 stars. What makes this book worth five stars is the following.
The book got me over my 'procrastination' hump and into learning electronics. I also liked the analogies and at times Amdahl pretty much comes out and says there are no really good analogies to electronics and everyday life. You'd be foolish to think that the dry textbooks know it all, and he gives some examples of how explanations in textbooks don't really make sense.
That's a big thing, because having forgotten the electronics I learned in highschool, I do remember knowing the rules and how to apply them, but feeling quite anxious about not understanding. which I felt hindered my remembering the subject. Remember, whatever the textbooks or physicists come up with, it is only a model of reality, a mental construct, which just so happens to be the best at the time, but can change.
I also liked the homemade gadgetry he introduces to people which I see lacking in many textbooks on the subject.
The repetitive nature of the concepts introduced along with regular 'review stories' helped to remember important concepts.
Finally, and most important of all, I like the inventive spirit the book seems to have. Kenn Amdahl manages to cultivate your imagination, definitely not something you'd find in other textbooks.
So the negatives of the book. I mentioned one. The stories could be too long at times. The imagery is not 'continuous' first it was green men, then chickens and ducks. The other major problem is that there is no index at the end of the book. There were a few times I wanted to look up a term, but couldn't remember where in the book I read it first.
For those that are impatient and need to learn electron theory fast, I don't recommend this book. It's not detailed enough and the jargon and concepts are not introduced fast enough. But if you are not in this category, this is a great book to start.
(Right now, I am reading as my second book 'electricity: a self teaching guide by Ralph Morrison. It's a good book so far.)There Are No Electrons: Electronics for Earthlings Overview

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Genius: The Life and Science of Richard Feynman Review

Genius: The Life and Science of Richard Feynman
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Genius: The Life and Science of Richard Feynman ReviewMany accounts of Feynman read as a sequence of gee-whiz feats of dazzling theatricality. Gleick's take on him is more measured. The author nevertheless manages to capture the irreverent spirit and ebullient persona of this larger-than-life physicist while using everyday language to describe the latter's brilliant contributions to quantum electrodynamics (QED).
Throughout the book, Gleick gives us many instances that showcase Feynman's lifelong refusal to abide by what he considered pointless or hypocritical social norms. He carried over this unorthodoxy to his work, often coming up with approaches often considered bizzarre by his peers, to deal with the conundrums of QED.
In deft language and simple analogies, Gleick outlines the developments of quantum mechanics until Feynman's time. The author them goes on to describe the renormalization approach of Feynman, Schwinger and Tomonaga that offered an ingenious method of removing the puzzling self-interaction terms that would otherwise lead to infinite (unphysical) field quantities.
In chronicling Feynman's life, Gleick gives us vivid vignettes of the physicist's encounters with the other luminaries in his field, his refusal to accept anything unquestioningly, the sheer energy, originality and versatality with which he approached every aspect of his life and his often messy and volatile relationships with women. Paying tribute to Feynman's genius while portraying the many aspects of this brilliant persona is a daunting task; Gleick has risen to the monumental challenge with grace and profound insight.Genius: The Life and Science of Richard Feynman Overview

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Examkrackers Complete MCAT Study Pkg: 5 Book Package Review

Examkrackers Complete MCAT Study Pkg: 5 Book Package
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Examkrackers Complete MCAT Study Pkg: 5 Book Package ReviewEDIT: I want to preface this review saying that Examkrackers is a good resource and may be great for some and not for others. I don't want to give the idea that it is a bad resource.
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Advantages:
- the materials look great (color)
- it seems to cover all the material necessary
- great marketing
Disadvantages:
- The concepts are very weak, especially in biology. You need to understand WHAT is going on conceptually. You can't just be thrown facts and material without knowing WHAT is going on. I quote another reviewer, "I have to say, the science is very conceptually weak... they teach you shortcuts, but if you don't grasp the concepts, the mcats is about tricking you on the weaknesses and you'll go for all the tricks."
- Not all of the books are excellent, the physics book is particularly weak.
- SIDE NOTE: Exam Krackers 101 Verbal passages is actually very strong and a quality resource.
I went through nearly all the reviews for this site for 30-40 minutes after I found the series to be less than 5 STAR quality (closer to 3) as so many reviewers were saying. I also noticed that a lot of the 5 star ratings were quick little "this is great, blah blah" short reviews. Please read some of the 3 star honest well written reviews. I did this. I also noticed over half of the 5 star reviews were following a certain pattern. The other thing that raised a flag was that this series had 96 reviews! 96! I tried to find ONE other MCAT comprehensive review that was close. Not one. The Kaplan 2007-2008 had 15 reviews, that was the closest.
So I asked a simple question, "how can I be sure these reviews are real or not?". One possible answer was, reviewers like to review. So if these were REAL reviews then I would assume there may be at least ONE other review by that reviewer. JUST ONE. So I decided to waste an enormous amount of time (I have a nice quad-core HP computer less than a month old, so it helped me go faster) and open every reviewer to see if they had reviewed any other books, I felt compelled to do this if there was any foul play going on. Here is what I found:
Here are the results as of June 4th, 2009:
There were 58 reviews that gave 5 stars:
---37 of these reviews only reviewed this book (2 anonymous "by Customer"). That is over 63%
---Another 2 were fishy in that they only reviewed this book and another Examkrackers book OR this book and gave a Kaplan book a low score saying in the first sentence, "I would use the Examkrackers books". In the first sentence made it tough to swallow. Also they were referring to some site called secret-route-dot-com which I looked up on amazon and google and found to be a scam type book with glowing reviews and then people calling it a scam.
All in all I estimate that 67% of the reviews were SINGLE reviews for this book (with only 2 that were this book and another EK book). 2 of every 3!
---33% of the reviewers that gave this book 5 Stars had reviewed some other book by some other publisher. Which looked real.
Crosscheck me on this, it is verifiable and true. Also because the reviews were fake it is likely that Examkrackers will not be able to remedy this situation because when you create a fake email to write a fake review you can't log in again because you will forget the log in/email.
To be fair I went to check out the Kaplan Premier Program with the highest number of reviews. The 2007-2008 had 15 reviews, I was only interested in the 5 star reviews as on this book (as if someone is to falsify reviews that would likely be 5 or 1 star reviews). There were FIVE 5 star reviews, and of the 5 all 5 had reviewed at least one other book or product from amazon.com.
--100% of the people who highly reviewed the Kaplan product were REPEAT reviewers and had reviewed some other book.
I am not advocating Kaplan's book as I haven't used it yet. I am very worried about the fidelity of some of these 5 star reviews. I would estimate that most of them are fake. _________________________________________________________________________
---------I have spaced this out as a poster didn't think I was being fair to examkrackers (objectively I do give them a 3)--------
Overall I would give the EK books a 3, but I had to give them a 2 because of the high probability of dishonesty.
_________________________________________________________________________I almost gave them a 1 because I am strongly against cheating and my gut tells me that employees created a lot of those reviews.
No one can be 100% sure, but after reading over the ones that seem fake, I see an eerie resemblance and repetition.
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EDIT:
So all in all, I would say this. If you are really conceptually strong and did amazing in the classes then ExamKrackers is ok because the quick summary fashion in which they present information will be great. If you haven't taken a class in a few years and are a non traditional student, these may not be for you. The other option is using the Examkrackers as a good base and when you don't understand the quick overviews to use a textbook or some other more comprehensive source that explains concepts better.
I think this is why you can see some people really enjoying this and some people who don't think it is that great. A person who HAS a concept down can read this and say, "oh yeah I remember this, I need to know this? ok" while someone else can read it who has the concept down and say, "wow, if I hadn't learned this really well I would have no clue what this is saying. This is horrible."
You see, 2 people with the same strength reacting to the same resource differently. And of course those who don't have a concept down will have a vague understanding based mostly on memory but their ability to think critically in new directions (which is what the MCAT truly tests, not memory) will be tough. They may be able to get a 10 but I think a lot of us studying are setting goals higher than a 10 in each section.
EXAMPLE OF WHAT I'M SAYING: The section on the electron transport chain is 1 long paragraph. When I read it I had NO idea what it was talking about other than all the definitions of all the major constituents involved. If asked a difficult question on proton gradients or what would happen if you inhibited ATP synthase I would have been clueless and unable to get it right. If asked a simple Q I may have been ok.
So, what I did was also buy the TPR hyperlearning books and I read the EK (with a lot of questions and confusion, filling in gaps with wikipedia sometimes) then I read the TPR section on the same topic (2-3 pages instead of 1 paragraph), now I am conceptually stronger, then I will create a small review back with the EK material.
So I am using the EK as my backbone, because it helps me make the review BUT with only the EK I wouldn't be able to excel (as I took bio years ago). Had I just finished bio and had an excellent prof that covered everything, then I may have been conceptually strong with something like the electron transport chain and the EK short paragraph (as opposed to 2-3 pages in the princeton book) would have been sufficient.
Not ALL the EK sections are this much shorter than the TPR sections BUT you will find more effort to make sure you know everything that is going on and why in a TPR book while EK's goal is cleary: HERE IS WHAT YOU NEED TO KNOW in the shortest way we can do it. (useful if you already conceptually strong).
GOOD Luck peoples!Examkrackers Complete MCAT Study Pkg: 5 Book Package Overview

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