1 comments about Statics and Mechanics of Materials: An Integrated Approach.

1. This book covers the material well. Some of the later chapters tend to loose the reader with a bunch of jargon. Overall, the book facilitated my learning of the material. I am still wondering about a solutions manual to accompany the text.

3 comments about Applied Statics and Strength of Materials (4th Edition).

1. This book presents complicated problems in an easy to follow step by step manner. Calculus is not required to work the problems. An excellent reference or text.



2. This book is very well organized and easy to read, however it has no solutions in the back. Without solutions it is very difficult to understand a text like this.



3. Man this is a book. What a freakin textbook. Good transaction. Excellent timing on this purchase. Dude got it to me within a week of the sale. Super awesome.

5 comments about Nanofuture: What's Next For Nanotechnology.

1. I can't give this book more than two stars, and that's being generous.
   
   Mr. Hall does present some interesting ideas, but unfortunately, his editors have done him a huge disservice. Here are the first three sentences of Stage I, on page 23;
   
   Essentially what we have now--nanoscale science and technology--including the ability to image at the atomic scale with scanning probe microscopes, and a very limited ability to manipulate, that is, by pushing things around with the same scanning probes. A scanning probe is essentially like feeling something with a stick. Because you have a computer behind it, you can touch it in a very close grid of points and produce a picture.
   
   I made it through the first fifty pages, and it didn't get any better.
   
   I don't know if Mr. Hall had a final read before publication, or not, but someone should have stopped this book from being published until it was properly edited.
   
   
   
   
   
   
   
   t



2. First of all I must say this book is not for the faint of heart or faint of mind. I wouldn't reccomend someone who hadn't been educated at a university or at least had interest in nanotechnology. For those who don't know nanotechnology in the loose usage is just parts that range from 1 to 1000 nanometers in size-essentially many billions of times smaller than the width of a human hair. However, what people in the industry refer to as true nanotechnology is machinery that can operate at a molecular or atomic level. Some aspects of the book get fairly deep into biology, physics and chemistry. For the first half of the book there is a "nanofact" or possible amazing thing that can be done with this technology every other page. The second half gets into the logistics and actual possiblity of nanotechnology.
   
   Not to be terribly critical but it is clear Hall's PhD is in science and not literature. I didn't go looking for errors but I did find a few. So if you are looking for a well edited book or mind some of the goofy onomotopia then you probably shouldn't read this book. Nanofuture is more like a science fiction novel written by an actual scientist than a reference. About halfway through the book I felt like could have really started to curtail. Instead Dr. Hall starts going into more opinated topics such as space living and transhumanism. I say opininated because they are his opinions. While some are warranted, others are just what he feels should happen. This is why scientists don't run countries.
   
   Hall touts nanotechnology as the next technological revolution and he makes a very good argument for it. Some of the most interesting facts: it would be possible to make an electrostatic engine with billions of smaller nanoengines capable of making the equivalent of a 100,000 horsepower jet engine that could fit in the palm of your hand/an atomically precise building going up for tens of miles/all the information on the internet (approximately 4 billion webpages) could fit into a single grain of sand with nanotechnology.
   
   Hall talks about five stages of nanotechnology which ranges from stage one which are just moving parts at the nanometer level to level five where whole nanofactories can replicate themselves and are completely autonomous. Having completed some college physics I know a few things about the possibility of these quite incredible machines. Everything at least is plausible because on the atomic level there is no waste and these machines will not ever wear, making so many things in transportation almost infinitely more efficient.
   
   The latter part of the book gets into some considerably further off technology such as synthesizing machines and robots. Some of this seems to be almost pointless to put in the book because a large part of it is speculation--especially the robots. More importantly the greatest factor in deciding if and when nanotechnology will come to fruition is politics. Science and progress, for the past several centuries has depended on politics, whether in the church or in the government. According to Hall one billion dollars a year are being allocated to research across the United States. Unfortunately, much of this funding is going to research that is moving rather slow and/or being used for creating small parts for current technology in cpu's, cell phones, televisions and various other electronics. He intimates that nanotechnology is most likely going to be considerably advanced in the next decade, almost certainly in the next 25 years and definitely in the next century. I have to agree with him about this, but only in the sense that this technology will become more prevalent; quite possibly never ubiquitous as televisions or computers.



3. It has been two decades since Drexler's Engines of Creation launched the beginnings of the nanotech revolution, and it has aged better than any other technical book I've ever read. Since Engines of Creation has not yet been updated, J. Storrs Hall's book Nanofuture: What's Next for Nanotechnology is the book to read to quickly learn why increasing numbers of people are getting excited about nanotechnology.
   
   Hall begins the book by addressing the current confusion regarding nanotechnology, explaining how the National Nanotechnology Initiative's budget is being spent on nanoscale science, with almost nothing going to what Hall defines as nanotechnology: atomically precise manufacturing of machines whose parts are built with atomic precision. This means that each atom and bond in the finished part is designed, just as the parts in the machinery are.
   
   To deliver on the results that most people expect from nanotechnology, the current NNI research focus--on synthetic chemistry, nanoscale particles, materials science, and even nanoelectronics--is not enough. In clear and easy-to-read prose, Hall explains why, and he explains what needs to be done, and how we've progressed towards that goal.
   
   As the former administrator of the sci.nanotech newsgroup, Hall observed or participated in many discussions on nanotech issues in the last two decades. These included everything from the technical problems of molecular self-assembly and self-replication to the methods for preventing catastrophic misuses of advanced molecular manufacturing. He uses this expertise to explain complex technical details, without ignoring the social and economic implications. The biggest difference between Engines of Creation and Nanofutures is that Hall discusses many advances made in the last 20 years, and addresses arguments that were leveled against Engines of Creation. He also puts many applications of nanotechnology in a detailed historical context, connecting them strongly not only with the present, but with the past.
   
   While Hall is optimistic about nanotech developments, he often explains the caveats involved. He says things like "If we can do using the primitive molecularly imprecise structures, isn't it reasonable that we'll be able to do much better with atomically precise ones?" He then explains the limits that we may not be able to overcome. For example, molecular manufacturing may enable better superconductors in general, but may not enable nanoscale superconducting wires because there may not be enough room for the molecular processes involved in superconduction to operate.
   
   One section of Nanofuture that might be over-optimistic is the section on AI, for the same reason that Engines of Creation was over-optimistic: the predictions are not concerned with new engineering (which generally is predictable) but with new science (in which new discoveries cannot be predicted). In this case, AI may even require new metaphysics.
   
   Hall's projections miss the ways in which the nanotechnology revolution will extend the two biggest problems raised by the World Wide Web. The first is the physical instantiation of computer viruses. They will most likely only infect nanofactories, but the impact will be more substantial than if only software were affected. The second is the human vulnerability to compulsive addictions (eg. gambling, pornography, computer games).
   
   In summary, unless you've been closely following nanotechnology for the past 20 years, Hall's Nanofuture is the best book for understanding the coming nanotech revolution.



4. For those who are new to nanotechnology, this is a good place to start. But be prepared for a journey through a variety of disciplines that relate to this topic, including physics, engineering, biology, and others. The descriptions and analogies that explain what nanotechnology is, how it would work, and what it would be good for are useful and understandable. Those who are already reasonably familiar with these concepts might find the first half of the book tedious, and should probably look for something more advanced, perhaps addressing particular applications of nanotechnology.
   The character of the narrative changes about two-thirds of the way into the book, as Hall shifts to discussions of possible nano-futures and why we should embrace them rather than fear them. At this point, technical explanation gives way to speculation and opinion. There's nothing wrong with that - it's always interesting to hear what experienced, forward-looking technologists have to say about their perspective on the future. From my perspective (political scientist specializing in science & tech policy, especially for space), I would have liked to see more about how evolving nanotech can be used to develop capabilities and solutions in the medium term and less about how we're going to become preternatural transhumans who all own Star Trek-style matter synthesizers.
   The artificial intelligence chapter is an interesting intro to AI, but the tie-in to nanotech is almost non-existent, so it seems like a sidebar discussion. Regarding the chapter on space, I would have liked to see this topic far more developed given the author's obvious interest in it. The role of nanotech in space seems relegated to making better spacesuits and stronger, lighter spaceships - and of course, providing spacefarers with those handy synthesizers than can turn asteroid dust into food. There must be a multitude of other applications: sensor nets, very large-scale life support systems, space agriculture, energy generation and distribution, propulsion, etc. For those who are fond of the "space elevator" and similar concepts, Hall quickly dismisses these as infeasible and proposes his own idea for an immense launch tower (60 miles high, 240 miles long) that seems like it would be even more difficult to construct than the space elevator.
   Some readers will prefer the technical exposition of the first part of the book; others, the futurist speculation of the second part. Either way, this is a topic we need to be thinking about, since the future is what we make it.



5. One of the other reviewers suggested library, and I followed that advice. I am so glad I did! This isn't a book I'd want in my personal collection. The editing is terrible, and the book feels more like a history lesson regarding the real-world roots of nano-tech than what's actually coming in the nano-tech future. While published in 2005, this book was merely Engines of Creation: The Coming Era of Nanotechnology slightly updated. Having read Drexler's first book, little has been added with this newer edition.
   
   The given examples of 'today's' nanotech are ultrafine powders, experimental computer chips, the beam of an electron microscope, and DNA. It is clear we are nowhere near real nanotech, and the author pads out the book with scientific history (seen it before) and speculation (read better science fiction).
   
   No mention is made of the potential health risks of nanetic debris left-over from damaged nano-machines or self-replication. The 'dangers' chapter focuses on the usual run-away machines, war weapons, and bio-illness attack nanites (author downplays this by stating biosciences will make more effective diseases than nano-science). Nothing about how your first generation nano-suit might poison you inadvertently. The brief paragraph on 'nano-particles' (p236) doesn't account for the potential unknown reaction between human immune systems and complex nano-particles/machines which somehow enter the human body through the skin. Rather, the author prefers to pipe-dream up nano-machines repairing our cells as an extended surgery tools. Again, nothing about allergic reactions or T-Cell responses. Nothing about what a low-level EMP pulse from sunspots or power line magnetic fields might do to an unshielded 'augmented' human (improvements chapter p257-269) or nano-machines in general. How might a person's own personal bio-electrical field and nerve impulses interfere with a functional nano-machine? Also nothing about nano-surveillance with picture and tracking capabilities.
   
   Overall, I was disappointed because it felt like the book didn't address the questions I had. No equations, and too fanciful and idealized. I doubt we're making matter into software (p271) in the next few hundred years. I did find the Utility Fog (p188) and parts of the Artificial Intelligence Chapter interesting, so I can't say I didn't like the book. Still not really worth buying for about 15 pages of material. Your mileage may vary, but use the library copy.

2 comments about Advanced Strength of Materials (Dover Books on Engineering).

1. Den Hartog is a master of solid mechanics. This text covers all the important topics very well, especially energy methods and torsion of non-circular cross-sections.



2. I bought this book to help me out in an advanced mechanics course I'm taking right now. Even though the notation is old, it's still quite a useful book.

5 comments about Ubiquity: Why Catastrophes Happen.

1. This is the book that I would like to have written. Although being a popular account, it is scientifically accurate and carefull in its suggestions, always informing the reader what is consolidated science and what is scientific speculation.
   In contrast to a previous review, I have read all the pages of this book. Since I am a physicist working in this very subject (self-organized criticality), I probably can say that if someone use the example of a Gaussian (bell shaped curve) to illustrate that the power laws discussed in the book are trivial, well, this person have not understood anything.
   Gaussians have exponential decays, so they predict that very larg events (catastrophes) will occur with vanishing probability. For example, the heigh of people is distributed as a Gaussian. What is the probability of finding a 3 meter person?
   Zero.
   Distributions wich have power law tails, depending on the power exponent, may have no well defined variance or even average value. This means that there is no "average" earthquake, and that very big earthquakes (or other cathastrophes) are not "acts of God" but have a no desprezible chance of occur due to simple chain reactions of events.
   I have introduced my students to ideas like critical states and modern physical thinking by using this book. So, I can recommend it to any reader without reserve. The emphasis by the author that critical chain reactions of events must be accounted by any view of History and Society is an important mind tool in our increasing interconnected (and, because it, prone to global chain reactions) world.



2. Its an interesting read. The reason I didnt give it 5 stars is that I have already read one of Marks previous books (Nexus) which has some overlap (not a lot) with this book. In fact it would be beneficial to readers to read the Nexus book before reading this one as what he writes about in that book really helps to understand this book.
   
   I was really hoping for some more answers on how to predict things based on what Mark talks about but that is the essential outcome of the book, you cant predict things!



3. It was well recommended to me but I found it quite boring and found myself fast forwarding through the chapters. It has an interesting theme - the cause of natural catastrophes - but for a science book I found it quite dissapoiting...



4. I was unable to finish this book though it was recommended by a cousin. I just found that I got lost in all the formulas and expected outcomes. but I am sure that it is good research, just not for me.



5. I, like some of the other reviewers, found that I could not read this cover to cover. And, I thirst for topics that look at the not-so-obvious faults and currents which underlie everything. Thus, I was eager to read about work being done with sandpile theories. Yes, there was mention of it. And, there were callbacks to it. But, whatever whole and complete picture Buchanan was trying to paint never came together. There were so many side trips and diversions that I just had to skim whole chapters in search of where I might pick up the trail again. I felt I was left in the woods, deep with discussion of the science itself rather than the topic this science was supposed to be exploring. Some of the stories were interesting. And, for me, there was a take away: the notion of maladjustment -- the build up of stress preceding any ...upheaval. In this case, the book might have a case of mal-editing.

5 comments about History of Strength of Materials.

1. This is a very good book. if you are a first or second year student studying any engineering(especialy Mechanics and Civil Eng.), You'd better it now. It helps you to understand the foundation theorem of mechanics especialy in elasticity. It's very helpful if you read it with Timoshenko and Gere's "Mechanics of materials"



2. This book is clearly intended for engineers or those studying engineering (as
   the other reviews indicate). For everyone else, it may as well be written in
   Mayan glyphs. I sent it back.



3. If you are not interested in civil engineering than you would probably be disappointed with this great math history book.It covers all the great mechanical master-builders and mathematical thinkers over the last five hundred years.It spans the whole length of their contributions to the field of engineering concerning the strength,deformations,and disruptions of solid materials pertaining to architectural structures and industrial features.This book is invaluable to anyone interested in the basis of today's theorical equations,accomplishments of the respected mathematicians and their accepted applied scientific practises.



4. I bought this book because it was cheap, but seemed semi-interesting; I didn't think I would ever pick it up. When I did open it I found it fascinating. There are many proofs and theory, but it is not too difficult. I'm not finished it, but I recommend this book to anyone with a background in mechanics.



5. I receipt the book very quikly and in excelent conditios of use, as a new book.

4 comments about Schaum's Outline of Strength of Materials 4th Edition.

1. This book is very good. First year students will find it very user friendly. Even a graduate engineer may need it to brush up previouly learned skills. All topics - e.g. material properties, stress, beam deflection, bending moments, columns, etc. are covered in very lucid manner. A must book for EVERY engineer.



2. I have already finished courses in strength of materials etc., and am using this book as a reference, instead of those voluminous handbooks. The book is very well written and William Nash has an excellent, straight forward way of putting forth the key points. The book has all the information you might need for a first course in strength of materials. I also use this book in conjunction with a finite element text to give me the theoretical values for comparison. In summary, if you need a solid backup for your textbook and a useful reference, you won't go wrong with this one.



3. I found the book to be very useful in that it summarizes my class textbook and offers many worked out example problems. I have since purchased Schaum's for my other classes and I find them equally useful



4. This is an excellent book. Very well written and with very explicit examples for a beginner or a pro.
   The new facts are the programs for some beams, columns and typical elements of strength of materials.
   The reading is easy and the processes are very simple and the exmaples are very clear.

5 comments about Engines of Creation: The Coming Era of Nanotechnology.

1. I read this book a number of years ago, and it still has a special place in my canon of books on technology and humanity. This is an engaging and lucid look at the future potential, and dangers, of miniturization, nano-scale physics and science meeting together in the form of nanotechnology.
   
   The ideas of molecular construction and deconstruction are truly intriguing and scary. Imagine being disassembled molecule by molecule by a nanoconstructor. Or, the idea of creating a crystal rocket out of pure atoms. This book is full of ideas and potentiality, and the ethical questions are perhaps just the tip of this literary iceberg.
   
   A great read for anyone interested in future technology and how science and technology are fusing on the cutting edge of reality. You don't need to be a quantum physicist or even a PhD to enojy this book. I read it as an undergrad in college and had a good time with it. It even inspired a sci-fi/fantasy book still in progress.



2. It's been twenty years. Over 50 million bucks have been spent on Nanotechnology, and not a single useful thing has come of it.
   
   Drexler writes really gee-whizzy stuff, but he's basically selling snake oil. Anybody with the basic clue about the law of scale can see most of the nanotech concepts are basically impossible. Meachnical devices can't be scaled down much below the millimeter level-- the basic laws of scale, friction, surface tension, charge, and materials disallows it. So Nanotech guys make microscopic "gears", but no shafts. Shafts, but no gears. "Motors" that can't turn anything. A 5x5 atomic checkerboard, a factor of 100 billion too small to be useful. And so on, and so forth.
   
   It's a clever book, but basically intellectually dishonest. Drexler went on to raise $20 million in venture capital and blew it all. That should give one pause when compared to the "limitless horizons" extolled in this book.



3. This book was ordered as a gift. I bought the book years ago and was so impressed with it I've purchased several as gifts.



4. Engines of Creation describes the foundations of and the issues surrounding humankind's increasing potential for building molecular machines. (Indeed as we stand here on the verge of 2008, notable accomplishments in nanotechnology continue to be made.) Drexler's "starter kit" comprises what he calls "universal assemblers," which are nanomachines designed for a simple task, such as replacing defective genetic links with healthful ones or bonding one cellular structure to another.
   
   ...I'm impressed with what the author and his peers have deeply pondered on preventing nanotechnological disasters, either from accident or from conscious intention of some malefactor. When one realizes a technology that can terraform planets can also readily destroy them... and us, one becomes a bit careful in how the technology is handled. The entire Part 3 of Drexler's book, "Engines of Destruction," is devoted to this issue.
   
   ...
   
   For my complete review of this book and for other book and movie
   reviews, please visit my site [...]
   
   Brian Wright
   Copyright 2007



5. I was actually expecting that this book would fulfill my expectations, on account of a large number of citations I've seen. It's absolutely prerequisite lecture to anyone who's interested in the nano perspectives.

5 comments about Nanotechnology For Dummies (For Dummies (Math & Science)).

1. Sometimes I have to chuckle at the titles contained in the For Dummies series. Nanotechnology is not something that I would normally think of as being of interest to Dummies. I guess I'd best not give examples of subjects I'd think of as being suitable For Dummies.
   
   However, that misses the point. The For Dummies series has pioneered a writing style that enables the non-informed reader to get a much better understanding of complex subjects.
   
   Nanotechnology is a science that is only about twenty years old. I say 'about' twenty years because it really depends on just what you consider to be the start of the science.
   
   Nanotechnology deals with things that are nano in size, say around 1/5000 the size of a red blood cell, about 1/75,000 the diameter of a human hair. At that size, all kinds of strange and wonderful things begin to happen. The technology promises to offer significant improvements in all kinds of areas from energy, health, to computers.
   
   I can't really talk about the subject in this short review, it's too big, that's why it takes a whole book to cover.
   
   Conclusion: Written in the For Dummies style, this is a book on Nanotechnology that makes it understandable to the average person. I'd consider it mandatory reading for anyone thinking of going into chemistry or physics for a career. My prediction (and the authors) is that this is going to be the hot science subject of the next generation. If I knew a high school student interested in science....



2. It's *amazing* what you can find in the "For Dummies" series... :)
   
   I've always enjoyed the Dummies series, especially when it comes to a complex subject where "I don't know what I don't know". A book that can explain the subject in simple terms gives me the mental framework on which to build my learning. This book is a perfect example... Nanotechnology For Dummies by Richard Booker and Earl Boysen.
   
   Contents:
   Part 1 - Getting Small with Nanotechnology: The Hitchhiker's Guide to Nanotechnology; Nano in Your Life; Gathering the Tools of the Trade
   Part 2 - Building a Better World with Nanomaterials: Nanomaterials Galore; Adding Strength with Composites
   Part 3 - "Smarter" Computers! Faster Internet! Cheaper Energy!: Building a Better Digital Brain; Routing Information at the Speed of Light; Nano-fying Electronics; Getting Energy and a Cleaner Environment with Nanotech
   Part 4 - Living Healthier Lives: Diagnosing Personal Health Quickly, Easily, and Pain-Free; The Fantastic Voyage into Medical Applications
   Part 5 - Investing in Nanotech: Industries Going Small; Countries Investing In a Nano Future; Nanotechnology Goes to School
   Part 6 - The Parts of Tens: Ten (or so) Nanotech Movers and Shakers; Further Reading on the Web and in Your Library
   Glossary; Index
   
   My prior knowledge of nanotech was pretty much restricted to the sci-fi realm, where machines build themselves and nanotech runs amok. But if asked how it all works, I'd be at a complete loss. In this Dummies title, Booker and Boysen do an excellent job in making the very, very tiny... very understandable. You won't be ready to launch your own nanotech firm or get a degree in nano-medicine, but you'll at least walk away with a better understanding of the subject. While the authors do tend to be wonderfully enthusiastic about the nanotech future, I think that their optimism is somewhat warranted. They show you the edge of the future that we are about to enter, and even after dismissing the hype, there's some intriguing stuff out there.
   
   I think I was most fascinated about where the medical field is going with nanotech. Customized delivery systems for medicines that can put the dosage right where it's needed. Nanocells that can attach themselves to cancer cells and then respond to laser stimulation and fry away the cancer. Obviously not next week's cure, but the authors show you it's closer than you might think.
   
   If this subject is something you've thought interesting but still don't understand very well, it's well worth getting a copy of Nanotechnology For Dummies. It's an enjoyable read, and you'll come away with many "small" pieces of insight (sorry, bad nano-joke there...)



3. Made Nanotechnology clear and easy to understand. Provides a pointed introduction to the fascinating subject of nano-techlogy with emphasis on the applications.
   
   Juan Carlos M. Escobar-remolina



4. Before reading this book, I didn't know, nor did I care about nanotechnology. But now, I see all the applications of it in every day life!



5. Nanomaterials: nanoparticles, nanotubes, quantum dots, fullerense, dendrimers, nanoprorous materials.
   
   Nanointermediates: coatins, fabrices, memory and logic chips, optical components
   
   Nano-enabling products: finished goods for cars, clothing, airplaines, computers, video, pharmaceuticals, appliances.
   
   I found the Lux Research Index reference interesting (LUXI). I read about companies building products like: Zyvex , Mems and Nanotechnology , Nanosys, Altair, NVE (spin state storage MRAM) , FEI (visualization systems), Veeco (data storage and semiconductor), and Accelrys.
   
   Hurdles: 1. Cost. The smaller the product being worked on, the more sophisticated and expensive the equipment needed to monitor quality control. 2. Availability. The equipment needed to producing nanomaterials may not be readily available or could be expensive. 3. Regulatory barriers. Evaluations and government approvals are needed to bring products such as a new drug to market, this takes time and time to market means sunk costs.
   
   Growth: "Nanotechnology is likely to become a trillion-dollar industry in less than ten years." If this is true the Nanotech indexes reflect the exponential growth explosion. The time required for manufacturing process transform suggests companies are making purchases now and generating capital nanotechnology projects. For example, Toyota should be in the process of covering major sections of their car production lines to use nanomaterials. It may be true that no process modification is required and that raw materials can be substituted for nanomaterials. This is the best scenerio. If nanotechnology is too emerge it could start with a series of new companies that will create radical and disruptive technology.
   
   Nanotubes: Researchers found that by adding a few percentage points of vaporized nichkel nanoparticels to the vaporized carbon, they could make as nanotubes as buckyballs. There are three methods for producing nanotubes: 1. High-pressure carbon monoxide deposition, HiPCO. This method involves a heated chamber which carbon monoxide molecules gas and small clusters of iron atoms flow. When the carbon monoxide molecules lands on the iron clusters and the iron acts as a catalyst breaking the molecule into carbon and oxygen. The result is a carbon nanotube and Carbon dioxide. The second method is called chemical-vapor deposition, CVD. In this method a hydrocarbon, such as, methane flows into a heated chamber coated with an iron catalyst. The high temperature causes the carbon and hydrogen break apart. The carbon atoms attach to the catalyst particles forming a nanotube. The third methods uses plasma torch to break apart hydrocarbon producing nanotubes.
   
   Nanotube have three topology arrangements: armchair, zigzag, and Chiral. Nanotubes are elastic and strong. Nanotubes conduct heat and cold very well. A nanotube can be either metallic or semiconducting. A nanotube is metallic I the energy level that allows delocalized electrons t flow between atoms throughout the nanotube is right above the energy level used by electrons attached. A nanotube is semiconducting if the energy level of the conduction band is high enough sou that there is an energy gap between it and the valence band. Nanotubes will provide more efficient energy transmission and faster and more power computers. Nanotube tensile strength (GPa)=200, Young's modulus(GPa)=1000, and density=2.
   
   Nanowire: Researchers have demonstrated using nanowires to create memory devices and transistors. A nanowire crosslatched arrangement will be able to store 40 gigabits per square centimeter.
   
   Polymer composites: "Scientist at University of Urbana-Champaign have demonstrated a unique self-healing composite. It involves dispersing microcapsules and catalyst within the composite. When the catalyst comes in contact with the healing agent inside the microcapsule, the healing agent polymerizes and hardens." Heals microcracks resulting from temperature changes or pressures of mechnical loading.
   
   NanoTransistor: A transistor is the switch that says whether a bit is 0 or 1. Think of a water dam. In the off position no water is flowing through and on the water is flowing, electrons are flowing freely. The smaller the transistor, the smaller your electron gate-which means faster switching between on and off, resulting in a faster overall processor.
   
   Photoelectrochemical hydrogen extraction: A photoelectrochemical device is a 30 nm layer of nanoparticles placed on a conductive glass. The nanoparticles are composed of semi-conducting oxides. The conducting glass is connected to an electrode. The space between electrode and nanoparticle film and conductive glass is filled with water. Light strikes the layer of nanoparticles knocking the electron's loose. Those electrons move through the conducting glass layer to the metal electrode putting a negative charge in it. You have a layer of nanoparticles that electrons are rushing out and a nearby metal electrode that electrons are rushing in. Hydrogen is emitted. (Hydrogen Solar Ltd)
   
   Nanotech Movers and Shakers: Richard Smalley , Charles Lieber , Jongjie Dai , James Heath , James Von Her , George Whitesides , Paul Alivisatos , Angela Belcher , and Richard Feyman and Eric Drexler .

5 comments about Roark's Formulas for Stress and Strain.

1. This Book contains every fromula that i would ever need during my Mechanical Engineering Course.
   It is quite easy to use, and the print is clear the index is user friendly



2. Very helpful book in engineering job, but unfortunately I've found some mistake (the reason for 4 stars).
   
   In general you can find lot of formulas in this book. This book is also very well known and that's the reason for recommending it. You can just refer to Roark's formulas and everybody knows what's that.



3. During my years as Structural Calculyst this book was always on my right side on my desk, and when I needed it, it was ready to help me find my way. One really very good Engineer has never found all formulas in his head, instead he should be able of finding them out on good references and really know how to use
   them all. This is the best reference book you are going to find when formulas is your subject, just buy it!
   The only book I know better than this one is written in German and few people are able to read in German, so!



4. While this volume is about 30% larger than my 5th edition, it has some glaring errors. When you get pointed to a table, you will not find tables with that number. The tables are titled but not numbered according to the referring item. Major PITB trying to figure out if the table that I found was the correct one.



5. I like having a Roark's around. It is handy for stress and strain problems.