Pedro S Theory

"A searching memoir . . . A subtle, expertly written repudiation of the American dream in favor of something more inclusive and more realistic."—Kirkus, starred review There are many Pedros living in many Americas . . . One Pedro goes to a school where they take away his language. Another disappears in the desert, leaving behind only a backpack. A cousin Pedro comes to visit, awakening feelings that others are afraid to make plain. A rumored Pedro goes missing so completely it's as if he were never there. In Pedro's Theory Marcos Gonsalez explores the lives of these many Pedros, real and imagined. Several are the author himself, while others are strangers, lovers, archetypes, and the men he might have been in other circumstances. All are journeying to some sort of Promised Land, or hoping to discover an America of their own. With sparkling prose and cutting insights, this brilliant literary debut closes the gap between who the world sees in us and who we see in ourselves. Deeply personal yet inspiringly political, it also brings to life those selves that never get the chance to be seen at all.

“One of the best popular accounts of how Einstein and his followers have been trying to explain the universe for decades” (Kirkus Reviews, starred review). Physicists have been exploring, debating, and questioning the general theory of relativity ever since Albert Einstein first presented it in 1915. This has driven their work to unveil the universe’s surprising secrets even further, and many believe more wonders remain hidden within the theory’s tangle of equations, waiting to be exposed. In this sweeping narrative of science and culture, an astrophysicist brings general relativity to life through the story of the brilliant physicists, mathematicians, and astronomers who have taken up its challenge. For these scientists, the theory has been both a treasure trove and an enigma. Einstein’s theory, which explains the relationships among gravity, space, and time, is possibly the most perfect intellectual achievement of modern physics—yet studying it has always been a controversial endeavor. Relativists were the target of persecution in Hitler’s Germany, hounded in Stalin’s Russia, and disdained in 1950s America. Even today, PhD students are warned that specializing in general relativity will make them unemployable. Still, general relativity has flourished, delivering key insights into our understanding of the origin of time and the evolution of all the stars and galaxies in the cosmos. Its adherents have revealed what lies at the farthest reaches of the universe, shed light on the smallest scales of existence, and explained how the fabric of reality emerges. Dark matter, dark energy, black holes, and string theory are all progeny of Einstein’s theory. In the midst of a momentous transformation in modern physics, as scientists look farther and more clearly into space than ever before, The Perfect Theory exposes the greater relevance of general relativity, showing us where it started, where it has led—and where it can still take us.

How math helps us solve the universe's deepest mysteries One of the great insights of science is that the universe has an underlying order. The supreme goal of physicists is to understand this order through laws that describe the behavior of the most basic particles and the forces between them. For centuries, we have searched for these laws by studying the results of experiments. Since the 1970s, however, experiments at the world's most powerful atom-smashers have offered few new clues. So some of the world's leading physicists have looked to a different source of insight: modern mathematics. These physicists are sometimes accused of doing 'fairy-tale physics', unrelated to the real world. But in The Universe Speaks in Numbers, award-winning science writer and biographer Farmelo argues that the physics they are doing is based squarely on the well-established principles of quantum theory and relativity, and part of a tradition dating back to Isaac Newton. With unprecedented access to some of the world's greatest scientific minds, Farmelo offers a vivid, behind-the-scenes account of the blossoming relationship between mathematics and physics and the research that could revolutionize our understanding of reality. A masterful account of the some of the most groundbreaking ideas in physics in the past four decades. The Universe Speaks in Numbers is essential reading for anyone interested in the quest to discover the fundamental laws of nature.

This book presents a comprehensive course of quantum mechanics for undergraduate and graduate students. After a brief outline of the innovative ideas that lead up to the quantum theory, the book reviews properties of the Schrödinger equation, the quantization phenomena and the physical meaning of wave functions. The book discusses, in a direct and intelligible style, topics of the standard quantum formalism like the dynamical operators and their expected values, the Heisenberg and matrix representation, the approximate methods, the Dirac notation, harmonic oscillator, angular momentum and hydrogen atom, the spin-field and spin-orbit interactions, identical particles and Bose-Einstein condensation etc. Special emphasis is devoted to study the tunneling phenomena, transmission coefficients, phase coherence, energy levels splitting and related phenomena, of interest for quantum devices and heterostructures. The discussion of these problems and the WKB approximation is done using the transfer matrix method, introduced at a tutorial level. This book is a textbook for upper undergraduate physics and electronic engineering students.

This is the first book in international relations theory entirely devoted to the political thought of Reinhold Niebuhr. Focusing on the existential theology which lies at the basis of Reinhold Niebuhr’s theory of international politics, it highlights the ways in which Niebuhrian realism was not only profoundly theological, but also constituted a powerful existentialist reconfiguration of the Realist tradition going back to Saint Augustine. Guilherme Marques Pedro offers an innovative account of Reinhold Niebuhr’s eclectic thought, branching out into politics, ethics, history, society and religion and laying out a conceptual framework through which his work, as much as the realist tradition of international political thought as a whole, can be read. The book calls for the need to revisit classic thinkers within IR theory with an eye to their interdisciplinary background and as a way to remind ourselves of the issues that were at stake within the field as it was growing in autonomy and diversity – issues which remain, regardless of its disciplinary development, at the core of IR’s concerns. This book offers an important contribution to IR scholarship, revealing the great historical wealth, intellectual originality but also the limitations and paradoxes of one of the greatest American political thinkers of the twentieth century.

This book is the first comprehensive monograph on the Function Theory of Lexicography, which originated at the Aarhus School of Business (Aarhus University). Function Theory considers dictionaries to be tools that are constructed for assisting specific users with punctual needs in specific usage situations, e.g. communicative-oriented situations and cognitive-oriented situations. The book's main focus is on defending the independent academic status of lexicography and its corollary: The process of designing, compiling and updating (specialised) online dictionaries needs a theoretical framework that addresses general and specific aspects. The former are common to all types of information tools, the latter are mainly dependent on the media for which the information tool is constructed and their specific target users. This books offers both aspects and moves from the highest level of abstraction to very detailed aspects of lexicographic work, e.g. how to convert an originally-conceived polyfunctional online dictionary into several monofunctional usage-based ones. The book illustrates that the theory and the methodology currently used by advocates of the Function Theory of Lexicography offers better results than other approaches and therefore makes its case for proposing the Function Theory for terminological/terminographical work.

Written as a hybrid between a research monograph and a textbook the first half of this book is concerned with basic concepts for the study of Banach algebras that, in a sense, are not too far from being commutative. Essentially, the algebra under consideration either has a sufficiently large center or is subject to a higher order commutator property (an algebra with a so-called polynomial identity or in short: Pl-algebra). In the second half of the book, a number of selected examples are used to demonstrate how this theory can be successfully applied to problems in operator theory and numerical analysis. Distinguished by the consequent use of local principles (non-commutative Gelfand theories), PI-algebras, Mellin techniques and limit operator techniques, each one of the applications presented in chapters 4, 5 and 6 forms a theory that is up to modern standards and interesting in its own right. Written in a way that can be worked through by the reader with fundamental knowledge of analysis, functional analysis and algebra, this book will be accessible to 4th year students of mathematics or physics whilst also being of interest to researchers in the areas of operator theory, numerical analysis, and the general theory of Banach algebras.

An introduction to decision making under uncertainty from a computational perspective, covering both theory and applications ranging from speech recognition to airborne collision avoidance. Many important problems involve decision making under uncertainty—that is, choosing actions based on often imperfect observations, with unknown outcomes. Designers of automated decision support systems must take into account the various sources of uncertainty while balancing the multiple objectives of the system. This book provides an introduction to the challenges of decision making under uncertainty from a computational perspective. It presents both the theory behind decision making models and algorithms and a collection of example applications that range from speech recognition to aircraft collision avoidance. Focusing on two methods for designing decision agents, planning and reinforcement learning, the book covers probabilistic models, introducing Bayesian networks as a graphical model that captures probabilistic relationships between variables; utility theory as a framework for understanding optimal decision making under uncertainty; Markov decision processes as a method for modeling sequential problems; model uncertainty; state uncertainty; and cooperative decision making involving multiple interacting agents. A series of applications shows how the theoretical concepts can be applied to systems for attribute-based person search, speech applications, collision avoidance, and unmanned aircraft persistent surveillance. Decision Making Under Uncertainty unifies research from different communities using consistent notation, and is accessible to students and researchers across engineering disciplines who have some prior exposure to probability theory and calculus. It can be used as a text for advanced undergraduate and graduate students in fields including computer science, aerospace and electrical engineering, and management science. It will also be a valuable professional reference for researchers in a variety of disciplines.