موضوعات
آموزش و پرورش
ادبیات و زبان
پزشکی، دندانپزشکی و داروسازی
تاریخ و جغرافیا
داستان و رمان
دیگر
دین و فلسفه
روانشناسی
ریاضیات و آمار
سلامتی، تناسب اندام و رژیم غذایی
شیمی و پلیمر
علوم اجتماعی و حقوق
علوم زیستی و بیوتکنولوژی
فیزیک و نجوم
کامپیوتر و اینترنت
کتابهای کودکان و داستان
کسب و کار و اقتصاد
کشاورزی و دامپزشکی و غذا
معماری
مهندسی و فناوری
هنر و تئاتر
محصولات
Better Looking, Better Living, Better Loving: How Chemistry can Help You Achieve Life's Goals - PDF
نویسندگان: خلاصه: John Emsley has carved out quite a niche for himself in writing popular books (not textbooks) dedicated to scientific matters in general, and chemistry matters in particular. One of his more inspired titles is "Better Looking, Better Living, Better Loving", which has a very unfortunate subtitle "How Chemistry Can Help You Achieve Life's Goals". The subtitle makes the book sound like a how-to book (Make your own mascara! Better breath through home-made mouthwash!) It is NOT a how-to book, but rather a how-it-is-done book. In a wide-ranging series of short essays, Emsley covers most consumer topics that exist at the intersection of chemistry and the personal consumer, including food, plastic containers, cosmetics, pharmaceuticals, birth control, cleaning products (for humans, clothes, and dishes), etc.The beauty of this book is that it can be picked up and read starting anywhere, and is therefore an ideal bathroom book (especially since there are a lot of bathroom-related topics!) or coffee table book (again, since there are a lot of food topics!). This makes some of the topics a little repetative for someone reading the book cover-to-cover over the course of a few days or weeks, but it's a better choice for a book of this type. I think the science is readily understandable to the average person (although it might be hard for me to judge, being a chemistry teacher), and there is a glossary for more scientific terms and broadened explanations. More importantly, the science is correct and rigorous while still presented in a palatable manner.I think North American readers will notice the no-nonsense style of writing. British authors (at least, scientific ones) tend to be more forthright than their American cousins, and it's especially noticable in this book's discussions on abortion and rape - two topics that American authors would couch in more subtle terms, with at least an acknowledgement of the cultural/moral issues associated with them. Similarly, most Americans are used to hedging their bets: Emsley comes right out and tells people that they are wrong to believe that aluminum has anything to do with Alzheimers, for example, and debunks other "common knowledge" associations just as ruthlessly, if they been scientifically demonstrated to be wrong.In terms of sheer readability, I think I prefer Joe Schwarcz's books that cover similar terrain. However, Emsley's book is more focussed and logically presented. It's certainly interesting, certainly entertaining, and even the best-read chemist is likely to learn something s/he didn't know. Unfortunately, the price is excessive compared to other books of this type (even other Emsley titles) - what gives, Amazon?
PVC Compounds and Processing - Original PDF
نویسندگان: خلاصه: This overview covers the basics of PVC formulation and processing, while extending the information to include the latest developments in materials and technology. PVC processing technologies and fabrication and treatment of PVC are reviewed. Over 400 references from recent literature are cited in the review, which is accompanied by abstracts from the Rapra Polymer Library database, to facilitate further reading.
Mechanics and Analysis of Composite Materials - Original PDF
نویسندگان: خلاصه: This book is concerned with the topical problems of mechanics of advanced composite materials whose mechanical properties are controlled by high-strength and high-stiffness continuous fibers embedded in polymeric, metal, or ceramic matrix. Although the idea of combining two or more components to produce materials with controlled properties has been known and used from time immemorial, modern composites have been developed only several decades ago and have found by now intensive application in different fields of engineering, particularly, in aerospace structures for which high strength-to-weightand stiffnessto-weight ratios are required.
Quantum thermodynamics: emergence of thermodynamic behavior within composite quantum systems - Original PDF
نویسندگان: خلاصه: This extended tutorial essay views thermodynamics as an incomplete description of quantum systems with many degrees of freedom. The main goal is to show that the approach to equilibrium - with equilibrium characterized by maximum ignorance about the open system of interest - neither requires that many particles nor is it a precise way of partitioning relevant for the salient features of equilibrium and equilibration. Moreover it is indeed quantum effects that are at work in bringing about universal thermodynamic behaviour of modestly sized open systems. Von Neumann`s concept of entropy thus proves to be much more widely useful than something to be feared, and far beyond truly macroscopic systems in equilibrium.
Plasticity of Metals and Alloys - Original PDF
نویسندگان: خلاصه: In this title, the results of observations and investigations of a new phenomenon - changes in the macroscopic characteristics of the plastic deformation of metals and alloys at a superconducting transition - are systematised. In these works it is shown for the first time that the electronic drag of dislocations accompanying low-temperature deformation is effective. The main experimental features of the phenomenon - the dependences of the characteristics of the change in plasticity at a superconducting transition on the stress, deformation, temperature, deformation rate, and concentration of the alloying element in the superconductor - and results indicating a correlation between the characteristics of the effect and the superconducting properties are presented. Experiments clarifying the mechanisms of the phenomenon are analysed. A brief exposition of the theoretical investigations of the electronic drag of dislocations in metals in the normal and superconducting states and the influence of a superconducting transition on the plasticity is given. The theoretical results are compared with the experimental results. Examples of the application of the effect as a new method for investigating the physical mechanisms of low-temperature plastic deformation are presented. The applied aspects of the phenomenon are discussed separately.
High temperature strain of metals and alloys: physical fundamentals - Original PDF
نویسندگان: خلاصه: Creep and fatigue are the most prevalent causes of rupture in superalloys, which are important materials for industrial usage, e.g. in engines and turbine blades in aerospace or in energy producing industries. As temperature increases, atom mobility becomes appreciable, affecting a number of metal and alloy properties. It is thus vital to find new characterization methods that allow an understanding of the fundamental physics of creep in these materials as well as in pure metals. Here, the author shows how new in situ X-ray investigations and transmission electron microscope studies lead to novel explanations of high-temperature deformation and creep in pure metals, solid solutions and superalloys. This unique approach is the first to find unequivocal and quantitative expressions for the macroscopic deformation rate by means of three groups of parameters: substructural characteristics, physical material constants and external conditions. Creep strength of the studied up-to-date single crystal superalloys is greatly increased over conventional polycrystalline superalloys. From the contents: - Macroscopic characteristics of strain at high temperatures - Experimental equipment and technique of in situ X-ray investigations - Experimental data and structural parameters in deformed metals - Subboundaries as dislocation sources and obstacles - The physical mechanism of creep and the quantitative structural model - Simulation of the parameters evolution - System of differential equations - High-temperature deformation of industrial superalloys - Single crystals of superalloys - Effect of composition, orientation and temperature on properties - Creep of some refractory metals For materials scientists, solid state physicists, solid state chemists, researchers and practitioners from industry sectors including metallurgical, mechanical, chemical and structural engineers.
Phase Transformations of Elements Under High Pressure - Original PDF
نویسندگان: خلاصه: The study of transformations of materials under high pressures promises to yield modifications with important applications in materials science and other fields including, by way of example, the dense metallic modification of hydrogen possessing extremely high superconducting properties. This work presents recent theoretical and experimental information gathered on phase diagrams of 96 elements. Data is presented on first- and second-phase transitions, melting lines, crystal structures of the stable and metastable phases, important phase properties such as the Curie and Neel temperature, and the superconducting temperature. Information is provided on elements' liquid state, amorphization, and metallization. Temperature-pressure diagrams are given for most of the elements.
Nanocrystalline Aluminum Alloys - Original PDF
نویسندگان: خلاصه: In order for a material to be defined nanocrystalline the size of its grains must be of the order of less than 100 nm. Such materials can be constituted by one or more phases distributed in one, two, or three dimensions. Examples are nanowires, layers either deposited on top of a substrate as coatings or stacked in suitable sequences, and bulk objects. If the material is fully made of nanograins the number density of crystals scales with their size (e.g., it can range from 1025 to 1021 m−3 for sizes of 5 and 100 nm respectively).
Mossbauer analysis of the atomic and magnetic structure of alloys - Original PDF
نویسندگان: خلاصه: The monograph indicates the key problems that have to be solved for the further development of the Mossbauer methods for analysis of the nuclear and magnetic structure of alloys, and offer solution variants for some of these problems based on the generalised results of a wide range of theoretical and experimental investigations, including original work by the author of the book and his colleagues.آیا کتاب مورد نظر هنوز بر روی سایت قرار نگرفته است؟ جای نگرانی نیست! کافی است بر روی گزینه سفارش کتاب کلیک کرده و درخواست خود را ثبت کنید. در کمتر از چند ساعت کتاب شما را آماده خواهیم کرد.