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
Comminution 1994 Proceedings of the 8th European Symposium on Comminution and 50th Event of the European Federation of Chemical Engineering, May 17-19, 1994 Stockholm, Swede - PDF
نویسندگان: خلاصه: Particle arrangements and confinements can be classified in the four groups (1) single particle situation, (2) one-particle layer, (3) particle bed confined closely or widely, and (4) ideal particle bed. Any confinement influences the stress distribution inside the bed due to the wall friction, and a complex stress field arises. The size-reduction effect is represented with the fraction of broken particles, the breakage function and the specific surface increases. The breakage functions of the particle bed comminution display as truncated logarithmic normal distributions. The stressing intensity can be quantified by the pressure, the stress field characteristics or the energy absorption. Although the stress field situation can differ extremely, the overall energy absorption has been proven to represent the stressing intensity very well in respect to the size-reduction. The transition from a close to a moderately wide confinement does not affect the size-reduction strongly. Steel balls inserted in a particle bed improve the breakage of coarse particles at a low intensity level. This advantage fades with increasing intensity and decreasing particle size.
Construction Management JumpStart The Best First Step Toward a Career in Construction Management (3rd Edition) - Original PDF
نویسندگان: خلاصه: Introduction Congratulations! You are about to embark on an adventure. This book is about the processes, the people, and the practices that we call construction management—a term and a profession that may be unfamiliar to many people. Construction, as most individuals understand it, is an activity or a series of activities that involves some craftspeople, building materials, tools, and equip- ment. But you will learn that there is a great deal more to it than that. If you think that construction is all about brawn and not much about brains, then you probably haven’t been paying very close attention to what has been going on in the built environment in the past several decades. Buildings today can be very complicated, and the building process has become extremely demanding. It takes savvy professional talent to orchestrate all of the means and methods needed to accomplish the building challenge. This book’s focus is not on construction per se. Its focus is on the construction process and those individuals who manage that process. Construction manage- ment involves the organization, coordination, and strategic effort applied to the construction activities and the numerous resources needed to achieve the building objective. Construction management combines both the art and science of building technology along with the essential principles of business, management, computer technology, and leadership. Construction management as a profession is a relatively new concept, which may explain why you have not heard of it before. Up until the 1960s, the management tasks associated with large construction projects were typically handled by civil engineers. But in 1965, faculty from nine universities gathered in Florida to form the Associated Schools of Construction. What started as a movement to upgrade the status of construction education at universities evolved into a standardized construction management curriculum leading to an exciting new career choice, one for which there was increasing demand. Men and women who love the idea of transforming a lifeless set of plans and specifications into something real—a single-family home, a high-rise office building, a biotech facility, a super highway, or a magnificent suspension bridge—had found an educational program that provided both the academic course work and the practical management tools needed to plan, organize, and coordinate the increas- ingly complex construction process. If you are one of the many individuals who desire the intellectual challenges of architecture, engineering, technology, and business, yet long to be outside in the thick of things, getting your hands dirty and ultimately producing a tangible result—something of lasting value—then construction management might just be the ticket for you
Darwin: Portrait of a Genius by Paul Johnson - Epub + Converted PDF
نویسندگان: خلاصه: All his life, Charles Darwin believed that inheritance was much more important in shaping a man or woman than education or environment. Nature rather than nurture was formative, in his view. Though he knew nothing of the science of genetics, and never used the word gene, which is first recorded in English in 1911, more than a quarter- century after his death, he is a classic case of genetic inheritance. Indeed, two of his grandparents and his father can reasonably be classified as geniuses. His paternal grandfather, Erasmus Darwin (1731–1802) came from an old family of modest landowners. After Cambridge, he trained as a doctor in Edinburgh, and then practiced in Litchfield, Dr. Johnson’s town (they did not get on). He was successful and had many patients, easily earning £1,000 a year, a handsome income then. News of his skill reached the ears of George III, who invited him to come to London as the royal doctor. But Dr. Darwin declined. The Hanoverian royals were slow at paying their doctors. In any case, Darwin was happy as he was, combining a busy provincial practice with poetry and science. The symbol of this dualism was his coach, which he designed himself. It was fitted up with a writing desk, a skylight, and a portion of his library, so that he could carry on his intellectual pursuits while going on his daily round of professional calls.
Dialogues and Short Stories in Turkish: read, listen, practice and improve your Turkish - PDF
نویسندگان: خلاصه: Dialogues and Short Stories in Turkish is the first book of the Türkçeyi Seviyorum (I Love Turkish) series. There are 15 texts in this book. These texts were written and then recorded specifically to support learners on the A1-A2 beginner level to improve their Turkish language skills and practice with fun reading, listening, writing and quiz activities. If you are a beginner plus, you can still benefit from this book in terms of improving your reading and listening skills and both reviewing and learning more vocabulary. That’s why it has been leveled as A1-A2+. Dialogues and Short Stories in Turkish is a self-improvement and self-practice book. It shouldn’t be considered as a teach yourself book. You don’t need to follow the sections step by step. Feel free to skip around the texts. You might be able to enjoy understanding all the vocabulary and grammar structures in this book but if you had any trouble understanding some of those depending on your past learning experiences, please use the grammar appendix and the glossary to gain a fruitful use of the book
Discrete Element Modelling of Particulate Media by Chuan-Yu Wu - Original PDF
نویسندگان: خلاصه: In numerical simulations of dense two-phase flow involving particulate materials the Discrete Element Method (DEM) has proved particularly effective in capturing the complex hydrodynamics of the solid phase. 1 DEM-based granular solid dynamics, including collisions and persistent contact with elaborate force-displacement laws, friction and cohesion have shown to be superior to traditional fluid-like, continuum approaches, which typically require coarse approximations and the introduction of artificial variables like solids pressure and viscosity. However, computational limitations of DEM models do not allow adding also the burden of flow simulations resolved at the level of particle-particle interstices, so that typically an averaged scale approach, with computational cell sizes of the order of a few particle diameters, is used. 2 .3 As a consequence, formulations of the drag force acting on individual particles are required to close the set of equations to solve for the solid and fluid phases. While many drag force models for monodisperse systems have been proposed in the literature, as discussed below, expressions for such force on a particle in a multi-particle system is currently the subject of extensive research work
Ecologies of Socialisms - Original PDF
نویسندگان: خلاصه: Eli Rubin and Scott Moranda Introduction Is Germany the “Greenest nation” as Frank Uekötter has provocatively asked?1 Forget the Berlin Wall, forget the Cold War, World War II, the Nazis, the Holocaust, the Kaiserreich, and forget the storied history of the Social Democratic Party – the SPD. Germany is now the nation of separated trash, solar panels and wind power. The only Wende people talk about now, in relation to Germany, is the Energiewende. And perhaps, that is part of the point. The Energiewende provides for a national identity that generates warm, positive press and seemingly avoids the more divisive and troubling aspects of past markers of Germanness. Even if the reality of the “greenest nation” is more complicated, it is undeniable that Germany has been at the center of the global history of environmentalism. Scientific conservation had deep roots among the forest- ers, urban planners, and other technical experts of Wilhelmine Germany who had outsized influence on Progressive reformers in the United States and British civil servants across their Empire.2 German-speakers also shaped Romanticism, ecology, and notions of holistic interconnectedness, most importantly in the figure of Alexander von Humboldt, whose Kosmos had a global influence.
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