Modelling Nutrient Utilization in Farm Animals

Book Description

This book describes current research in modelling nutrient use in farm animals, from cellular to ecosystem level. The chapters are developed from papers presented at a satellite meeting of the ninth International Symposium on Ruminant Physiology, held in South Africa in October 1999.

Nutrient Digestion and Utilization in Farm Animals: Modelling Approaches (Cabi Publishing)

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Nutrient Digestion and Utilization in Farm Animals: Modelling Approaches (Cabi Publishing)

Manufacturer: CABI
ProductGroup: Book
Binding: Hardcover

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ASIN: 1845930053

Book Description

This book brings together the papers presented orally or as posters at the Sixth International Workshop on Modelling Nutrient Utilization in Farm Animals, held in Wageningen, The Netherlands, 6 - 8 September 2004. The purpose of this book is to present current research in modelling nutrient
digestion and utilization in cattle, sheep, pigs, poultry and fish.

The book is organized into six sections that cover a range of topics and modelling approaches; these are (i) absorption and passage; (ii) growth and development; (iii) mineral metabolism; (iv) methodology; (v) environmental impact; and (vi) animal production and feed evaluation. Deterministic,
stochastic, empirical and mechanistic modelling approaches are described.

Book Description

Life on earth will come to an end. It's just a matter of when. A Guide to the End of the World focuses on the many potential catastrophes facing our planet and our species in the future, and looks at both the probability of these events happening and our chances of survival. Coverage extends from discussion of the likely consequences of the current global warming to the inevitable destruction of the earth in the far future, when it is enveloped by our giant, bloated sun. In between, other 'end of the world scenarios' will be examined, including the New Ice Age, asteroid and comet impact, supervolcanoes, and mega-tsunami.

Customer Reviews:

Hysteria.......2005-07-23

If you want to know all about all sorts of terrible things that will kill you, everyone you know and end civilization as we know it, read this book!
You'll be scared and worried and yet you will be powerless to do anything.
Complete waste of time.

Chicken Little was right.......2002-12-31

There's a lot to worry about here, and frankly I'm worried. The main disaster that I didn't know about until I read this intriguing little book is the volcanic "super-eruption." Take your standard volcanic blast and multiply it by something like a thousand and one begins to get the picture. Not only that, but a super-eruption isn't necessarily going to happen around the old fault lines or Vulcan sites. No, a super-eruption with enough power to usher in a "volcanic winter" can happen suddenly without warning virtually anywhere.

The really scary thing about super-eruptions is that not only can't they be predicted, they can't be prevented. In this sense they are worse than an earth-crossing asteroid or unleashed Oort Cloud comets. We might be able to see a meteor coming our way and with current technology nudge it off its course or blast it into smaller pieces, but there is absolutely nothing we can do about a super-eruption. Even if the super-eruption takes place halfway around the world, its effects, possibly leading to a civilization-ending volcanic winter, will be felt everywhere. With the social disruption, the disease, and the cold and starvation, the living (to recall a phrase from the Cold War) may very well envy the dead.

McGuire, who is Benfield Greig Professor of Geophysical Hazards at University College London, recalls for our delectation, "perhaps the greatest volcanic explosion ever" that took place at Toba in northern Sumatra 73,500 years ago. It qualified as a Volcanic Explosivity Index 8 (VEI 8) event, which means it was about one thousand times as powerful as the VEI 5 1980 blast at Mount St. Helens. It tore a hole in the ground one hundred kilometers across and sent an estimated 3,000 cubic kilometers (that's kilometers)of debris into the atmosphere, enough "to cover virtually the whole of India with a layer of ash one metre thick." (pp. 98-103) A volcanic winter of perhaps six years followed with "up to 5,000 million tonnes of sulphuric acid aerosols" in the air, enough to "cut the amount of sunlight reaching the surface by 90 per cent." (p. 104) An ice age followed, perhaps triggered by the mammoth eruption. McGuire goes on to speculate that so many humans died world wide that humanity went through a "population bottleneck" that almost sent us the way of the dinosaurs. (pp. 105-107)

McGuire, who sometimes refers to himself as "Disasterman" (p. 131), also looks at "The Threat from Space" (Chapter 5). He separates the asteroids from the comets and guesses that our chance of being killed during an asteroid or comet walloping is "750 times more likely than winning the UK lottery." To me, the really scary "from outer space" scenario is a hoard of comets being dislodged from their normal orbits to fly toward mother earth, so many that we would have no ability to ward them off.

Global warming and the coming ice age are also topics explored by the good professor. Earthquakes and tsunamis have their chapter and there is an Epilogue (in which he notes, e.g., that come the year 2100 "an extraordinary 50 per cent or so of the people in Japan and western Europe will be 60" years old or older). There are a couple of appendices showing "threat" and geological timescales, and a modest index. The chapter on global warming, I must say, left me somewhat confused. Clearly McGuire believes human activity is a factor in making the nineties the hottest decade ever recorded, but whether our pollution will melt the ice caps or help to usher in an ice age is not clear.

Some other items of interest in this very readable book:

There was a geological episode in the earth's history referred to as "the Cryogenian" in which the earth was covered by "a carapace of ice a kilometre thick." McGuire calls this "Snowball Earth" and when it finally melted 565 million years ago, the Cambrian explosion of life followed. (p. 69-71)

An earthquake in the Tokyo-Yokohama region similar in intensity (8.3 on the Richter Scale) to that which struck in 1923--a reprise, McGuire says, is "thought to be only decades away"--would cripple the Japanese economy and have disastrous world wide effects. (pp. 123-131)

The so-called "Contraction & Convergence" plan "to reduce greenhouse gas emissions" that would require monitoring and billing polluters for their emissions on a per capita basis: to me, this requirement would reveal the true cost of various enterprises and would help us to move toward renewable production and ecologically sound business practices.

Not to be picky, but on page 18 McGuire reports that Hurricane Andrew of 1992 "brought to bear on the city" of Miami "wind speeds of up to 300 kilometres per second." That's about 670,000 miles per hour! (I suspect he meant wind speeds of 300 kilometres per HOUR.)

Bottom line: fascinating, a little flippant at times, but a full-out good read by a man who knows what he is talking about.

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A Guide to the End of the World : Everything You Never Wanted to Know
Bill McGuire
Manufacturer: Oxford University Press, USA
ProductGroup: Book
Binding: Paperback
ASIN: B000OKOHWS

Book Description

Nonlinear Solid Mechanics a Continuum Approach for Engineering Gerhard A. Holzapfel Graz University of Technology, Austria With a modern, comprehensive approach directed towards computational mechanics, this book covers a unique combination of subjects at present unavailable in any other text. It includes vital information on 'variational principles' constituting the cornerstone of the finite element method. In fact this is the only method by which Nonlinear Solid Mechanics is utilized in engineering practice. The book opens with a fundamental chapter on vectors and tensors. The following chapters are based on nonlinear continuum mechanics - an inevitable prerequisite for computational mechanicians. In addition, continuum field theory (applied to a representative sample of hyperelastic materials currently used in nonlinear computations such as incompressible and compressible materials) is presented, as are transversely isotropic materials, composite materials, viscoelastic materials and hyperelastic materials with isotropic damage. Another central chapter is devoted to the thermodynamics of materials, covering both finite thermoelasticity and finite thermoviscoelasticity. Also included are:
* an up-to-date list of almost 300 references and a comprehensive index
* useful examples and exercises for the student
* selected topics of statistical and continuum thermodynamics.
Furthermore, the principle of virtual work (in both the material and spatial descriptions) is compared with two and three-field variational principles particularly designed to capture kinematic constraints such as incompressibility. All of the features combined result in an essential text for final year undergraduates, postgraduates and researchers in mechanical, civil and aerospace engineering and applied maths and physics.

Customer Reviews:

Useful.......2007-07-17

This book is basically a regurgitation and watered-down version of "Mathematical Foundations of Elasticity", by Marsden and Hughes ( Mathematical Foundations of Elasticity ), just like so many other recently released texts/references including treatments of non-linear continuum mechanics (MFoE was released in 1983, and anticipated a great deal of published work hence). This title has neither the depth of treatment nor the rigorous precision of MFoE. Still it is useful since it does expand more on topics this title and MFoE share in common.

Holzapfel has the distinct "flavor", in many places throughout his work in this book, of the writings/work of Juan C. Simo, one of the superlative workers in non-linear finite elements, who also worked in collaboration with T.J.R. Hughes (e.g., Computational Inelasticity (Interdisciplinary Applied Mathematics) ), and is now deceased.

This is a fresh presentation however and Holzapfel does an excellent job of conveying difficult concepts while maintaining rigor, which is no easy feat. The only place this work falls a little short on rigorous precision is in the treatment of linearization of the non-linear system(s) resulting from the various weak forms.

I did find Holzapfel's treatment of the Lie derivative, just like many other recently published works on the same subject, a bit more revealing and intuitive, while maintaining the requisite rigor, than the alternative derivation/explanation in MFoE.

De La Balle .......2007-07-15

This book is actually very good. It has a great sections about hyperelastic materials (~ 100 pages). Also it explains well tensors operations (2nd order and 4th order tensors)...

Useless for an intro to continuum graduate course.......2007-01-09

We were required to use this book for ENME670 Continuum Mechanics at the University of Maryland. It was so terrible I had to constantly seek out other resources. I had gotten many books out of our library, almost all of which were more useful than this one (Mase was particularly helpful). Maybe I am being a bit unfair because our professor did not closely follow this book but instead went off of his own notes, but still I cannot think of many textbooks that I liked less than this one throughout my college career. Perhaps this book would have been useful to someone who already knows many of the basics of Continuum Mechanics, but for me it was just horrendous.

A superb book on continuum mechanics.......2000-10-25

I am a graduate student with the mechanical engineering department at Dalhousie university. This book is one of the best texts I have ever read. Every chapter is well organised and the material is presented in a clear manner that stimulates your interest on the subject of continuum mechanics. I have no doubt that engineers of all disciplines (students & professionals) as well as physists and other scientists will find the book as exciting as I have.

One of the best books on Continuum Mechanics........2000-04-13

I think this book tends to fill the bibliographic void left by the Classic and "currently dificult to get" works of C. Truesdell's "The Non-Linear Field Theories of Mechanics" and D. C. Leigh's "Nonlinear Continuum Mechanics; An Introduction to the Continuum Physics and Mathematical Theory of the Nonlinear Mechanical Behavior of Materials". This book is divided mainly in two parts, one part dealing with the mathematical framework at which the subject is based on, and the other one deals with the Physical Principles and the Constitutive Theories of several materials including rubber like materials and biological tissue. It is true that you will not find a specific definition of Nonlinear Material Behavior as I was supposed to find it at the begginig of the work. Instead of that, such a definition must be self-generated into the decided reader's mind, once he or she begins to read the book's parts regarding to Hyperelastic and Viscoelastic Materials .

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A great introductory text on solid mechanics

Nonlinear Continuum Mechanics of Solids
Yavuz Basar , and Dieter Weichert
Manufacturer: Springer
ProductGroup: Book
Binding: Hardcover

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ASIN: 354066601X

Book Description

The aim of the book is the presentation of the fundamental mathematical and physical concepts of continuum mechanics of solids in a unified description so as to bring young researchers rapidly close to their research area. Accordingly, emphasis is given to concepts of permanent interest, and details of minor importance are omitted. The formulation is achieved systematically in absolute tensor notation, which is almost exclusively used in modern literature. This mathematical tool is presented such that study of the book is possible without permanent reference to other works.

Customer Reviews:

A great introductory text on solid mechanics.......2001-03-16

This is an extremely well-written introductory text on solid mechanics. I strongly recommend it for graduate students of all engineering disciplines particularly those interested in (or anticipate future involvement with) FEM applications.

Nonlinear Continua (Computational Fluid and Solid Mechanics)

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Nonlinear Continua (Computational Fluid and Solid Mechanics)
Eduardo N. Dvorkin , and Marcela B. Goldschmit
Manufacturer: Springer
ProductGroup: Book
Binding: Hardcover

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ASIN: 3540249850

Book Description

This book develops a modern presentation of Continuum Mechanics, oriented towards numerical applications in the fields of nonlinear analysis of solids, structures and fluid mechanics. The kinematics of the continuum deformation, including pull-back / push-forward transformations between different configurations, stress and strain measures, balance principles, constitutive relations and variational principles are developed using general curvilinear coordinates. Even though the mathematical presentation of the different topics is quite rigorous, an effort is made to link formal developments with engineering physical intuition.

Nonlinear Effects in Fluids and Solids (Mathematical Concepts and Methods in Science and Engineering)

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Nonlinear Effects in Fluids and Solids (Mathematical Concepts and Methods in Science and Engineering)

Manufacturer: Springer
ProductGroup: Book
Binding: Hardcover

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ASIN: 0306451794

Book Description

This volume honors the accomplishments of Ronald S. Rivlin, whose pioneering theoretical and experimental research in finite elasticity is a landmark. Contributions to this important reference reflect the depth and breadth of Rivlin's research interest and his influence on continuum mechanics. Topics include nonlinear elasticity, viscoelasticity, plasticity, thermodynamics, non-Newtonian flow, liquid crystals, two-phase structures, membranes, mechanics of ice, electroelastic and magnetoelastic waves, fracture, and stability.

Nonlinear Electromechanical Effects and Applications (Series in Theoretical and Applied Mechanics, Vol 1)

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Nonlinear Electromechanical Effects and Applications (Series in Theoretical and Applied Mechanics, Vol 1)
Gerald A. Maugin
Manufacturer: World Scientific Publishing Company
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Binding: Hardcover

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ASIN: 9971978431

The continuum mechanics of coherent two-phase elastic solids with mass transport (Research report / Carnegie Mellon University. Dept. of Mathematics. Center for Nonlinear Analysis)

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The continuum mechanics of coherent two-phase elastic solids with mass transport (Research report / Carnegie Mellon University. Dept. of Mathematics. Center for Nonlinear Analysis)
Morton E Gurtin
Manufacturer: Carnegie Mellon University, Dept. of Mathematics, Center for Nonlinear Analysis
ProductGroup: Book
Binding: Unknown Binding

Continuum Mechanics Via Problems and Exercises: Theory and Problems : Answers and Solutions (Series on Nonlinear Science, Series a , Vol 19, Part 1&2)

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Continuum Mechanics Via Problems and Exercises: Theory and Problems : Answers and Solutions (Series on Nonlinear Science, Series a , Vol 19, Part 1&2)

Manufacturer: World Scientific Pub Co Inc
ProductGroup: Book
Binding: Hardcover

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Book Description

This volume is intended to help graduate-level students of Continuum Mechanics become more proficient in its applications through the solution of analytical problems. Published as two separate books - Part I on Theory and Problems with Part II providing Solutions to the problems - professors may also find it quite useful in preparing their lectures and examinations. Part I includes a brief theoretical treatment for each of the major areas of Continuum Mechanics (fluid mechanics, thermodynamics, elastic and inelastic solids, electricity, dimensional analysis, and so on), as well as the references for further reading. The bulk of Part II consists of about 1000 solved problems. The book includes bibliographical references and index.

Shells with thickness distension (Research report / Carnegie Mellon University. Dept. of Mathematical Sciences. Center for Nonlinear Analysis)

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Shells with thickness distension (Research report / Carnegie Mellon University. Dept. of Mathematical Sciences. Center for Nonlinear Analysis)
A DiCarlo
Manufacturer: Carnegie Mellon University, Dept. of Mathematical Sciences, Center for Nonlinear Analysis
ProductGroup: Book
Binding: Unknown Binding

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Book Description

The Best Movie Writing 2001 is dedicated to collecting the best writing about our most influential medium, our most popular, evocative and hotly debated art and mode of storytelling, and includes several new features: introductions of each piece by the guest editor; comments by the contributors on their pieces: and a catalog of America’s most important movie magazines. Discussions are not limited to individual films, actors and directors but range from the racial politics of Gone With the Wind to the protest surrounding the 1999 adaptation of the book American Psycho; from how the MPAA rates independent films, to the battle between proponents of film and the new digital technology. Includes selections from Ian Buruma, Molly Haskell, Michael Herr, John Irving, Lawrence Kasdan, Jack Kerouac, Stuart Klawans, Stanley Kubric, and others.

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