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The Universe in a Mirror: The Saga of the Hubble Space Telescope and the Visionaries Who Built It
Par Robert Zimmerman. 2010
The Hubble Space Telescope has produced the most stunning images of the cosmos humanity has ever seen. It has transformed…
our understanding of the universe around us, revealing new information about its age and evolution, the life cycle of stars, and the very existence of black holes, among other startling discoveries. But it took an amazing amount of work and perseverance to get the first space telescope up and running. The Universe in a Mirror tells the story of this telescope and the visionaries responsible for its extraordinary accomplishments. Robert Zimmerman takes readers behind the scenes of one of the most ambitious scientific instruments ever sent into space. After World War II, astronomer Lyman Spitzer and a handful of scientists waged a fifty-year struggle to build the first space telescope capable of seeing beyond Earth's atmospheric veil. Zimmerman shows how many of the telescope's advocates sacrificed careers and family to get it launched, and how others devoted their lives to Hubble only to have their hopes and reputations shattered when its mirror was found to be flawed. This is the story of an idea that would not die--and of the dauntless human spirit. Illustrated with striking color images, The Universe in a Mirror describes the heated battles between scientists and bureaucrats, the perseverance of astronauts to repair and maintain the telescope, and much more. Hubble, and the men and women behind it, opened a rare window onto the universe, dazzling humanity with sights never before seen. This book tells their remarkable story. A new afterword updates the reader on the May 2009 Hubble service mission and looks to the future of astronomy, including the prospect of a new space telescope to replace Hubble.A comparative look at evangelical churches across the U.S.-Canada border that reveals deep political differencesIt is now a common refrain…
among liberals that Christian Right pastors and television pundits have hijacked evangelical Christianity for partisan gain. The Politics of Evangelical Identity challenges this notion, arguing that the hijacking metaphor paints a fundamentally distorted picture of how evangelical churches have become politicized. The book reveals how the powerful coalition between evangelicals and the Republican Party is not merely a creation of political elites who have framed conservative issues in religious language, but is anchored in the lives of local congregations.Drawing on her groundbreaking research at evangelical churches near the U.S. border with Canada—two in Buffalo, New York, and two in Hamilton, Ontario—Lydia Bean compares how American and Canadian evangelicals talk about politics in congregational settings. While Canadian evangelicals share the same theology and conservative moral attitudes as their American counterparts, their politics are quite different. On the U.S. side of the border, political conservatism is woven into the very fabric of everyday religious practice. Bean shows how subtle partisan cues emerge in small group interactions as members define how "we Christians" should relate to others in the broader civic arena, while liberals are cast in the role of adversaries. She explains how the most explicit partisan cues come not from clergy but rather from lay opinion leaders who help their less politically engaged peers to link evangelical identity to conservative politics.The Politics of Evangelical Identity demonstrates how deep the ties remain between political conservatism and evangelical Christianity in America.Mathematical Analysis of Deterministic and Stochastic Problems in Complex Media Electromagnetics (Princeton Series in Applied Mathematics #42)
Par G. F. Roach, I. G. Stratis, A. N. Yannacopoulos. 2012
Electromagnetic complex media are artificial materials that affect the propagation of electromagnetic waves in surprising ways not usually seen in…
nature. Because of their wide range of important applications, these materials have been intensely studied over the past twenty-five years, mainly from the perspectives of physics and engineering. But a body of rigorous mathematical theory has also gradually developed, and this is the first book to present that theory. Designed for researchers and advanced graduate students in applied mathematics, electrical engineering, and physics, this book introduces the electromagnetics of complex media through a systematic, state-of-the-art account of their mathematical theory. The book combines the study of well posedness, homogenization, and controllability of Maxwell equations complemented with constitutive relations describing complex media. The book treats deterministic and stochastic problems both in the frequency and time domains. It also covers computational aspects and scattering problems, among other important topics. Detailed appendices make the book self-contained in terms of mathematical prerequisites, and accessible to engineers and physicists as well as mathematicians.Statistical Mechanics in a Nutshell (In a Nutshell #10)
Par Luca Peliti. 2011
A concise introduction to statistical mechanicsStatistical mechanics is one of the most exciting areas of physics today, and it also…
has applications to subjects as diverse as economics, social behavior, algorithmic theory, and evolutionary biology. Statistical Mechanics in a Nutshell offers the most concise, self-contained introduction to this rapidly developing field. Requiring only a background in elementary calculus and elementary mechanics, this book starts with the basics, introduces the most important developments in classical statistical mechanics over the last thirty years, and guides readers to the very threshold of today's cutting-edge research.Statistical Mechanics in a Nutshell zeroes in on the most relevant and promising advances in the field, including the theory of phase transitions, generalized Brownian motion and stochastic dynamics, the methods underlying Monte Carlo simulations, complex systems—and much, much more. The essential resource on the subject, this book is the most up-to-date and accessible introduction available for graduate students and advanced undergraduates seeking a succinct primer on the core ideas of statistical mechanics.Provides the most concise, self-contained introduction to statistical mechanicsFocuses on the most promising advances, not complicated calculationsRequires only elementary calculus and elementary mechanicsGuides readers from the basics to the threshold of modern researchHighlights the broad scope of applications of statistical mechanicsGalactic Dynamics: Second Edition (Princeton Series in Astrophysics #13)
Par James Binney, Scott Tremaine. 2008
Since it was first published in 1987, Galactic Dynamics has become the most widely used advanced textbook on the structure…
and dynamics of galaxies and one of the most cited references in astrophysics. Now, in this extensively revised and updated edition, James Binney and Scott Tremaine describe the dramatic recent advances in this subject, making Galactic Dynamics the most authoritative introduction to galactic astrophysics available to advanced undergraduate students, graduate students, and researchers. Every part of the book has been thoroughly overhauled, and many sections have been completely rewritten. Many new topics are covered, including N-body simulation methods, black holes in stellar systems, linear stability and response theory, and galaxy formation in the cosmological context. Binney and Tremaine, two of the world's leading astrophysicists, use the tools of theoretical physics to describe how galaxies and other stellar systems work, succinctly and lucidly explaining theoretical principles and their applications to observational phenomena. They provide readers with an understanding of stellar dynamics at the level needed to reach the frontiers of the subject. This new edition of the classic text is the definitive introduction to the field. ? A complete revision and update of one of the most cited references in astrophysics Provides a comprehensive description of the dynamical structure and evolution of galaxies and other stellar systems Serves as both a graduate textbook and a resource for researchers Includes 20 color illustrations, 205 figures, and more than 200 problems Covers the gravitational N-body problem, hierarchical galaxy formation, galaxy mergers, dark matter, spiral structure, numerical simulations, orbits and chaos, equilibrium and stability of stellar systems, evolution of binary stars and star clusters, and much more Companion volume to Galactic Astronomy, the definitive book on the phenomenology of galaxies and star clustersWizards, Aliens, and Starships: Physics and Math in Fantasy and Science Fiction
Par Charles L. Adler. 2014
Explaining the science behind science fiction and fantasy—from the probable to the impossibleFrom teleportation and space elevators to alien contact…
and interstellar travel, science fiction and fantasy writers have come up with some brilliant and innovative ideas. Yet how plausible are these ideas--for instance, could Mr. Weasley's flying car in the Harry Potter books really exist? Which concepts might actually happen, and which ones wouldn’t work at all? Wizards, Aliens, and Starships delves into the most extraordinary details in science fiction and fantasy--such as time warps, shape changing, rocket launches, and illumination by floating candle--and shows readers the physics and math behind the phenomena.With simple mathematical models, and in most cases using no more than high school algebra, Charles Adler ranges across a plethora of remarkable imaginings, from the works of Ursula K. Le Guin to Star Trek and Avatar, to explore what might become reality. Adler explains why fantasy in the Harry Potter and Dresden Files novels cannot adhere strictly to scientific laws, and when magic might make scientific sense in the muggle world. He examines space travel and wonders why it isn’t cheaper and more common today. Adler also discusses exoplanets and how the search for alien life has shifted from radio communications to space-based telescopes. He concludes by investigating the future survival of humanity and other intelligent races. Throughout, he cites an abundance of science fiction and fantasy authors, and includes concise descriptions of stories as well as an appendix on Newton's laws of motion.Wizards, Aliens, and Starships will speak to anyone wanting to know about the correct--and incorrect--science of science fiction and fantasy.Applications of Modern Physics in Medicine
Par Mark Strikman, Kevork Spartalian, Milton W. Cole. 2015
The connections between modern physics and medical technologyMany remarkable medical technologies, diagnostic tools, and treatment methods have emerged as a…
result of modern physics discoveries in the last century—including X-rays, radiation treatment, laser surgery, high-resolution ultrasound scans, computerized tomography (CT) scans, and magnetic resonance imaging. This undergraduate-level textbook describes the fundamental physical principles underlying these technological advances, emphasizing their applications to the practice of modern medicine.Intended for science and engineering students with one year of introductory physics background, this textbook presents the medical applications of fundamental principles of physics to students who are considering careers in medical physics, biophysics, medicine, or nuclear engineering. It also serves as an excellent reference for advanced students, as well as medical and health researchers, practitioners, and technicians who are interested in developing the background required to understand the changing landscape of medical science. Practice exercises are included and solutions are available separately in an instructor's manual.Complete discussion of the fundamental physical principles underlying modern medicineAccessible exploration of the physics encountered in a typical visit to a doctorPractice exercises are included and solutions are provided in a separate instructor’s manual (available to professors)A companion website (modernphysicsinmedicine.com) presents supplementary materialsClassical Electromagnetism in a Nutshell (In a Nutshell #13)
Par Anupam Garg. 2012
A comprehensive, modern introduction to electromagnetismThis graduate-level physics textbook provides a comprehensive treatment of the basic principles and phenomena of…
classical electromagnetism. While many electromagnetism texts use the subject to teach mathematical methods of physics, here the emphasis is on the physical ideas themselves. Anupam Garg distinguishes between electromagnetism in vacuum and that in material media, stressing that the core physical questions are different for each. In vacuum, the focus is on the fundamental content of electromagnetic laws, symmetries, conservation laws, and the implications for phenomena such as radiation and light. In material media, the focus is on understanding the response of the media to imposed fields, the attendant constitutive relations, and the phenomena encountered in different types of media such as dielectrics, ferromagnets, and conductors. The text includes applications to many topical subjects, such as magnetic levitation, plasmas, laser beams, and synchrotrons.Classical Electromagnetism in a Nutshell is ideal for a yearlong graduate course and features more than 300 problems, with solutions to many of the advanced ones. Key formulas are given in both SI and Gaussian units; the book includes a discussion of how to convert between them, making it accessible to adherents of both systems.Offers a complete treatment of classical electromagnetismEmphasizes physical ideasSeparates the treatment of electromagnetism in vacuum and material mediaPresents key formulas in both SI and Gaussian unitsCovers applications to other areas of physicsIncludes more than 300 problemsUncorked: The Science of Champagne - Revised Edition
Par Gérard Liger-Belair. 2013
The spectacular science behind champagne's effervescenceUncorked quenches our curiosity about the inner workings of one of the world's most prized…
beverages. Esteemed for its freshness, vitality, and sensuality, champagne is a wine of great complexity. Mysteries aplenty gush forth with the popping of that cork. Just what is that fizz? Can you judge champagne quality by how big the bubbles are, how long they last, or how they behave before they fade? And why does serving champagne in a long-stemmed flute prolong its chill and effervescence? Through lively prose and a wealth of state-of-the-art photos, this revised edition of Uncorked unlocks the door to what champagne is all about.Providing an unprecedented close-up view of the beauty in the bubbles, Gérard Liger-Belair presents images that look surprisingly like lovely flowers, geometric patterns, even galaxies as the bubbles rise through the glass and burst forth on the surface. He illustrates how bubbles form not on the glass itself but are "born" out of debris stuck on the glass wall, how they rise, and how they pop. Offering a colorful history of champagne, Liger-Belair tells us how it is made and he asks if global warming could spell champagne's demise. In a brand-new afterword, he updates the reader on new developments in the world of bubble science and delves even more deeply into the processes that give champagne its unique and beautiful character.Bubbly may tickle the nose, but Uncorked tackles what the nose and the naked eye cannot—the spectacular science that gives champagne its charm and champagne drinkers immeasurable pleasure.Principles of Laser Spectroscopy and Quantum Optics
Par Paul R. Berman, Vladimir S. Malinovsky. 2011
Principles of Laser Spectroscopy and Quantum Optics is an essential textbook for graduate students studying the interaction of optical fields…
with atoms. It also serves as an ideal reference text for researchers working in the fields of laser spectroscopy and quantum optics. The book provides a rigorous introduction to the prototypical problems of radiation fields interacting with two- and three-level atomic systems. It examines the interaction of radiation with both atomic vapors and condensed matter systems, the density matrix and the Bloch vector, and applications involving linear absorption and saturation spectroscopy. Other topics include hole burning, dark states, slow light, and coherent transient spectroscopy, as well as atom optics and atom interferometry. In the second half of the text, the authors consider applications in which the radiation field is quantized. Topics include spontaneous decay, optical pumping, sub-Doppler laser cooling, the Heisenberg equations of motion for atomic and field operators, and light scattering by atoms in both weak and strong external fields. The concluding chapter offers methods for creating entangled and spin-squeezed states of matter. Instructors can create a one-semester course based on this book by combining the introductory chapters with a selection of the more advanced material. A solutions manual is available to teachers. Rigorous introduction to the interaction of optical fields with atoms Applications include linear and nonlinear spectroscopy, dark states, and slow light Extensive chapter on atom optics and atom interferometry Conclusion explores entangled and spin-squeezed states of matter Solutions manual (available only to teachers)Topics in Quaternion Linear Algebra (Princeton Series in Applied Mathematics #45)
Par Leiba Rodman. 2014
Quaternions are a number system that has become increasingly useful for representing the rotations of objects in three-dimensional space and…
has important applications in theoretical and applied mathematics, physics, computer science, and engineering. This is the first book to provide a systematic, accessible, and self-contained exposition of quaternion linear algebra. It features previously unpublished research results with complete proofs and many open problems at various levels, as well as more than 200 exercises to facilitate use by students and instructors. Applications presented in the book include numerical ranges, invariant semidefinite subspaces, differential equations with symmetries, and matrix equations.Designed for researchers and students across a variety of disciplines, the book can be read by anyone with a background in linear algebra, rudimentary complex analysis, and some multivariable calculus. Instructors will find it useful as a complementary text for undergraduate linear algebra courses or as a basis for a graduate course in linear algebra. The open problems can serve as research projects for undergraduates, topics for graduate students, or problems to be tackled by professional research mathematicians. The book is also an invaluable reference tool for researchers in fields where techniques based on quaternion analysis are used.Strength of Materials (Dover Books on Physics)
Par J. P. Hartog. 1977
Among introductory texts on the strength of materials, this work is particularly distinguished. It was originally developed by Professor Den…
Hartog to meet the needs of engineering students at M.I.T. for a sound yet lucid first course in strength of materials. As such it has also enjoyed wide popularity in engineering schools throughout the world.But the book was remarkable in a number of other ways, so that it has become one of the favorite refresher and reference works for engineers as well as a popular self-study text. Perhaps the chief reason for this is that in addition to all the customary elementary material on the subject (i.e., clear instructions to the fundamentals of tension, torsion, bending, compound stresses, deflection of beams, etc.) it also contains a considerable amount of more advanced material concerning methods of great practical value to working engineers which are not usually included in introductory texts. This material is presented in starred sections (which may be omitted on a first reading without interrupting the flow of the presentation) and includes a full treatment of the Mohr circle and its application to the determination of moments of inertia and strains as well as stresses; a lucid elementary presentation of the theory of the center of shear; and one of the few elementary presentations of the theory of the center of shear; and one of the few elementary discussions of the "Myosotis" method of calculating beam deflections, a method which often possesses considerable advantages over the more usual methods involving moment-area or the differential equation of bending.Other material not usually found in elementary texts but which are frequently of great value to the practicing engineer are the discussions of the statically indeterminate truss, reinforced concrete, plastic deformations, thick-walled cylinders, thick curved bars, Maxwell's Reciprocal Theorem, and photoelasticity.In all sections, both general principles and concrete applications are given. Another feature which readers have found unusually helpful is the 85-page section of 350 problems which gives the student practice in techniques and further illustrates applications. All problems are complete with answers.The best backyard experiments for hands-on science learningThe Ultimate Book of Saturday Science is Neil Downie's biggest and most astounding…
compendium yet of science experiments you can do in your own kitchen or backyard using common household items. It may be the only book that encourages hands-on science learning through the use of high-velocity, air-driven carrots.Downie, the undisputed maestro of Saturday science, here reveals important principles in physics, engineering, and chemistry through such marvels as the Helevator—a contraption that's half helicopter, half elevator—and the Rocket Railroad, which pumps propellant up from its own track. The Riddle of the Sands demonstrates why some granular materials form steep cones when poured while others collapse in an avalanche. The Sunbeam Exploder creates a combustible delivery system out of sunlight, while the Red Hot Memory experiment shows you how to store data as heat. Want to learn to tell time using a knife and some butter? There's a whole section devoted to exotic clocks and oscillators that teaches you how.The Ultimate Book of Saturday Science features more than seventy fun and astonishing experiments that range in difficulty from simple to more challenging. All of them are original, and all are guaranteed to work. Downie provides instructions for each one and explains the underlying science, and also presents experimental variations that readers will want to try.Elementary Particle Physics in a Nutshell (In a Nutshell #11)
Par Christopher G. Tully. 2012
An introduction to high-energy physics that prepares students to understand the experimental frontierThe new experiments underway at the Large Hadron…
Collider at CERN in Switzerland may significantly change our understanding of elementary particle physics and, indeed, the universe. This textbook provides a cutting-edge introduction to the field, preparing first-year graduate students and advanced undergraduates to understand and work in LHC physics at the dawn of what promises to be an era of experimental and theoretical breakthroughs.Christopher Tully, an active participant in the work at the LHC, explains some of the most recent experiments in the field. But this book, which emerged from a course at Princeton University, also provides a comprehensive understanding of the subject. It explains every elementary particle physics process—whether it concerns nonaccelerator experiments, particle astrophysics, or the description of the early universe—as a gauge interaction coupled to the known building blocks of matter. Designed for a one-semester course that is complementary to a course in quantum field theory, the book gives special attention to high-energy collider physics, and includes a detailed discussion of the state of the search for the Higgs boson.Introduces elementary particle processes relevant to astrophysics, collider physics, and the physics of the early universeCovers experimental methods, detectors, and measurementsFeatures a detailed discussion of the Higgs boson searchIncludes many challenging exercisesProfessors: A supplementary Instructor's Manual which provides solutions for Chapters 1-3 of the textbook, is available as a PDF. It is restricted to teachers using the text in courses. To obtain a copy, please email your request to: Ingrid_Gnerlich "at" press.princeton.edu.Tesla: Inventor of the Electrical Age
Par W. Bernard Carlson. 2013
The definitive account of Tesla's life and workNikola Tesla was a major contributor to the electrical revolution that transformed daily…
life at the turn of the twentieth century. His inventions, patents, and theoretical work formed the basis of modern AC electricity, and contributed to the development of radio and television. Like his competitor Thomas Edison, Tesla was one of America's first celebrity scientists, enjoying the company of New York high society and dazzling the likes of Mark Twain with his electrical demonstrations. An astute self-promoter and gifted showman, he cultivated a public image of the eccentric genius. Even at the end of his life when he was living in poverty, Tesla still attracted reporters to his annual birthday interview, regaling them with claims that he had invented a particle-beam weapon capable of bringing down enemy aircraft.Plenty of biographies glamorize Tesla and his eccentricities, but until now none has carefully examined what, how, and why he invented. In this groundbreaking book, W. Bernard Carlson demystifies the legendary inventor, placing him within the cultural and technological context of his time, and focusing on his inventions themselves as well as the creation and maintenance of his celebrity. Drawing on original documents from Tesla's private and public life, Carlson shows how he was an "idealist" inventor who sought the perfect experimental realization of a great idea or principle, and who skillfully sold his inventions to the public through mythmaking and illusion.This major biography sheds new light on Tesla's visionary approach to invention and the business strategies behind his most important technological breakthroughs.Quantum Philosophy: Understanding and Interpreting Contemporary Science
Par Roland Omnès. 1999
In this magisterial work, Roland Omnès takes us from the academies of ancient Greece to the laboratories of modern science…
as he seeks to do no less than rebuild the foundations of the philosophy of knowledge. One of the world's leading quantum physicists, Omnès reviews the history and recent development of mathematics, logic, and the physical sciences to show that current work in quantum theory offers new answers to questions that have puzzled philosophers for centuries: Is the world ultimately intelligible? Are all events caused? Do objects have definitive locations? Omnès addresses these profound questions with vigorous arguments and clear, colorful writing, aiming not just to advance scholarship but to enlighten readers with no background in science or philosophy. The book opens with an insightful and sweeping account of the main developments in science and the philosophy of knowledge from the pre-Socratic era to the nineteenth century. Omnès then traces the emergence in modern thought of a fracture between our intuitive, commonsense views of the world and the abstract and--for most people--incomprehensible world portrayed by advanced physics, math, and logic. He argues that the fracture appeared because the insights of Einstein and Bohr, the logical advances of Frege, Russell, and Gödel, and the necessary mathematics of infinity of Cantor and Hilbert cannot be fully expressed by words or images only. Quantum mechanics played an important role in this development, as it seemed to undermine intuitive notions of intelligibility, locality, and causality. However, Omnès argues that common sense and quantum mechanics are not as incompatible as many have thought. In fact, he makes the provocative argument that the "consistent-histories" approach to quantum mechanics, developed over the past fifteen years, places common sense (slightly reappraised and circumscribed) on a firm scientific and philosophical footing for the first time. In doing so, it provides what philosophers have sought through the ages: a sure foundation for human knowledge. Quantum Philosophy is a profound work of contemporary science and philosophy and an eloquent history of the long struggle to understand the nature of the world and of knowledge itself.The most famous scientist of the twentieth century, Albert Einstein was also one of the century's most outspoken political activists.…
Deeply engaged with the events of his tumultuous times, from the two world wars and the Holocaust, to the atomic bomb and the Cold War, to the effort to establish a Jewish homeland, Einstein was a remarkably prolific political writer, someone who took courageous and often unpopular stands against nationalism, militarism, anti-Semitism, racism, and McCarthyism. In Einstein on Politics, leading Einstein scholars David Rowe and Robert Schulmann gather Einstein's most important public and private political writings and put them into historical context. The book reveals a little-known Einstein--not the ineffectual and naïve idealist of popular imagination, but a principled, shrewd pragmatist whose stands on political issues reflected the depth of his humanity.Nothing encapsulates Einstein's profound involvement in twentieth-century politics like the atomic bomb. Here we read the former militant pacifist's 1939 letter to President Franklin D. Roosevelt warning that Germany might try to develop an atomic bomb. But the book also documents how Einstein tried to explain this action to Japanese pacifists after the United States used atomic weapons to destroy Hiroshima and Nagasaki, events that spurred Einstein to call for international control of nuclear technology.A vivid firsthand view of how one of the twentieth century's greatest minds responded to the greatest political challenges of his day, Einstein on Politics will forever change our picture of Einstein's public activism and private motivations.Freedom: A Mixtape
Par Marcel Stewart with Suitcase In Point. 2024
Freedom: A Mixtape is a soulful artistic response to recent and historical violence on Black bodies, presented through a collection…
of original songs, stories, poems, anecdotes, spoken-word pieces, and musical instrumentation from folks living in Ontario's Niagara Region. A community conversation about our complicated relationship with emancipation and the human right to be free, Freedom: A Mixtape is a compilation album that is part protest and part celebration. It is history and the present moment all at once, a reminder that this moment is part of a larger, ongoing movement. Familiar pains are felt deeply in moments both bygone and bitingly present, setting the tone—and stage—for action.Analog field recordings and soothing talk-radio energy give voice to the residue of intergenerational trauma, the depths of colonialism, resilience amidst oppressive conditions, and a clarion call that joy is a birthright for everyone. With emotional precision and softness, Freedom: A Mixtape offers a radical reminder that in our bleakest moments, we rise up through love of self and community.Basic Modeling and Theory of Creep of Metallic Materials (Springer Series in Materials Science #339)
Par Rolf Sandström. 2024
This open access book features an in-depth exploration of the intricate creep behavior exhibited by metallic materials, with a specific…
focus on elucidating the underlying mechanical properties governing their response at elevated temperatures, particularly in the context of polycrystalline alloys. Traditional approaches to characterizing mechanical properties have historically relied upon empirical models replete with numerous adjustable parameters, painstakingly tuned to match experimental data. While these methods offer practical simplicity, they often yield outcomes that defy meaningful extrapolation and application to novel systems, invariably necessitating the recalibration of parameters afresh.In stark contrast, this book compiles a compendium of models sourced from the scientific literature, meticulously crafted through ab initio methodologies rooted in fundamental physical principles. Notably, these models stand apart by their conspicuous absence of adjustable parameters. This pioneering effort is envisioned as a groundbreaking initiative, marking the first of its kind in the field. The resulting models, bereft of arbitrary tuning, offer a level of predictability hitherto unattained. Notably, they provide a secure foundation for ascertaining operational mechanisms, contributing significantly to enhancing our understanding of material behavior in high-temperature environments.This open access book is a valuable resource for researchers and seasoned students engaged in the study of creep phenomena in metallic materials. Readers will find a comprehensive exposition of these novel, parameter-free models, facilitating a deeper comprehension of the intricate mechanics governing material deformation at elevated temperatures.Isolated Objects in Quadratic Gravity: From Action Principles to Observations (Springer Theses)
Par Samuele Silvervalle. 2024
One of the main unanswered question of modern Physics is "How does gravity behave at small scales?". The aim of…
this thesis is to illustrate in a comprehensive but accessible way how to look for deviations from Einstein's theory of General Relativity in this regime, looking at the simplest celestial bodies: static and spherically symmetric ones.With a conservative and bottom-up approach, at smaller scales the first corrections to the action of General Relativity are generally considered to be terms quadratic in the curvature tensors; while these modifications do not cure the inconsistency between gravity and quantum mechanics, the solutions of this theory are plausible candidates to be the first-order corrections of the classical ones.Even with such simple modifications, a striking picture emerges from the study of isolated objects: the unique Schwarzschild solution of General Relativity is only a rare bird in the set of solutions, with non-Schwarzschild black holes, wormholes and naked singularities appearing as possible substitutes.Tailored to graduate students and researchers entering this field, this thesis shows how to construct these new solutions from action principles, how to characterize their metric, how to study their physical properties, such as their stability or Thermodynamics, and how to look for phenomenological signatures.