Advanced strength and applied elasticity by Ansel C. Ugural, Saul K. Fenster

By Ansel C. Ugural, Saul K. Fenster

Engineering has its proportion of poorly-written books, and this is often one of them. instead of provide a transparent, concise reasons, the authors in its place concentrate on unnecessary derivations and different filler fabric that is of little use to the scholar. the result's a complicated mess that makes scholars like myself annoyed and stressed.

The difficulties are just compounded via the inability of examples. To me, in engineering books, examples are only as vital as causes simply because let's accept it, engineering is *not* an summary paintings. Its foundation is the actual program of clinical theories to real-world difficulties. unfortunately, this book's examples are all too constrained in scope, clarification, and intensity. The authors will derive equations for a number of sections after which have a unmarried, short, user-friendly instance (where slightly whatever is defined and you are pressured to turn into a psychic to figure out their line of inspiration) after which count on you to do the exponentially more challenging difficulties at the back of each one bankruptcy. it is ridiculous.

When I first received the booklet, i presumed it used to be attention-grabbing they have been capable of cram such an concerned box right into a fairly small publication (~500 small-sized pages). you then notice they have been in a position to do this type of feat through skipping over great quantities of significant reasons and examples.

Be ready to be flipping throughout the e-book continually to refer again to formulation in numerous chapters, and in addition be ready to scratch your head gazing negative illustrations. Equations also are poorly categorized simply because if you end up fast flipping in the course of the pages, it really is particularly tough to work out if an equation is one among value, or just an intermediate step in a derivation. solid books field their vital or foundational equations (which after all skill this ebook does not).

What's fairly unhappy is that poorly-written books like this one have the aptitude to show an otherwise-enthused scholar off from an issue. sooner than taking a category the place this publication used to be the assigned analyzing, i used to be fairly drawn to complicated pressure research. Now i glance upon the topic with disdain since it sounds like an incredible complicated mess.

I gave the ebook one superstar for 2 purposes: first, Amazon does not enable 0-star stories, and moment, might be the booklet will be of a few use for reference, yet so far as a textual content for studying the cloth, steer clear of in any respect expenses!

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Text and translation by Clagett in Oresme 1968a, pp. 89f. 4 "Impetus" as the Cause of Motion and of Acceleration The theory of impetus can be considered primarily as a theory of causality. It undertakes to explain how a projectile (proiectum separatum) can be moved when it is separated from the projecting agent (proiciens) without appealing to action at a distance. The answer provided by the impetus theory is that the projecting agent impresses a force (vis impressa) onto the mobile and that this force continues to act when the projectile has been separated from the primary agent.

Oresme conceived the impetus as not only conserving the motion but as increasing it, too. In consequence, acceleration itself increases with increasing motion. Hence, projected on the conceptual system of classical mechanics, it would seem that Buridan conceives of impetus as proportional to velocity while Oresme conceives of it as proportional to acceleration. This latter possibility is essentially Descartes' argument in a part of the initial document and of the diary note which we have yet to discuss.

18 See Questiones super geometriam EuC/idis, in Oresme 1968a, pp. 559-561. THE MEDIEVAL mADmON 19 qualitatis or of the application of the Merton Rule. "19 The same is true of all other books printed in the 15th and 16th centuries in which this rudimentary form of the configurations illustrates in the margins the concepts discussed in the text itself. 20 The following text taken from Jacobus de Sancto Martino's De perfectione specierum shows clearly the function of the figures as representing conceptual links between terms rather than as calculation devices21 : For latitude is to be imagined by a plane surface and this in many ways.

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