This book introduces the modern field of 3+1 numerical relativity. The book has been written in a way as to be as self-contained as possible, and only assumes a basic knowledge of special relativity. Starting from a brief introduction to general relativity, it discusses the different concepts and tools necessary for the fully consistent numerical simulation of relativistic astrophysical systems, with strong and dynamical gravitational fields. Among the topics discussed in detail are the following: the initial data problem, hyperbolic reductions of the field equations, gauge conditions, the evolution of black hole space-times, relativistic hydrodynamics, gravitational wave extraction and numerical methods. There is also a final chapter with examples of some simple numerical space-times. The book is aimed at both graduate students and researchers in physics and astrophysics, and at those interested in relativistic astrophysics.
This book is a self-contained introduction to the field of numerical relativity. Starting from basic general relativity, it introduces all the concepts and tools necessary for the fully relativistic simulation of astrophysical systems with strong and dynamical gravitational fields.
In this book, I respond to the need for explanations of UAPs/UFOs, as presented by the Report from the Office of the Director of National Intelligence. I work within the Framework of the Pentagon’s statement that UAPs are real objects with advanced intelligently controlled technologies, which are not ours (US). I present explanations of the Physics of UFOs/UAPs and how they work. I analyze and explain UAPs’ flight characteristics. I present explanations for the observables listed by the National Intelligence Director’s Report. I address and refute the hypothesis that UAPs are advanced hypersonic drones from Russia or China. I review and address the National Security as well as air safety concerns. I present case evidence and historical data supporting the hypothesis that some UFOs/UAPs are advanced technologies that do not seem to originate from Earth. It is evidence that may be conducive to the discovery, the realization that we are not alone in the Universe. This book is also intended to be used for additional reading in Astronomy and Physics classes.
A narrative history of the unlikely Maoist rebellion that terrorized Peru even after the fall of global Communism. On May 17, 1980, on the eve of Peru’s presidential election, five masked men stormed a small town in the Andean heartland. They set election ballots ablaze and vanished into the night, but not before planting a red hammer-and-sickle banner in the town square. The lone man arrested the next morning later swore allegiance to a group called Shining Path. The tale of how this ferocious group of guerrilla insurgents launched a decade-long reign of terror, and how brave police investigators and journalists brought it to justice, may be the most compelling chapter in modern Latin American history, but the full story has never been told. Described by a U.S. State Department cable as “cold-blooded and bestial,” Shining Path orchestrated bombings, assassinations, and massacres across the cities, countryside, and jungles of Peru in a murderous campaign to seize power and impose a Communist government. At its helm was the professor-turned-revolutionary Abimael Guzmán, who launched his single-minded insurrection alongside two women: his charismatic young wife, Augusta La Torre, and the formidable Elena Iparraguirre, who married Guzmán soon after Augusta’s mysterious death. Their fanatical devotion to an outmoded and dogmatic ideology, and the military’s bloody response, led to the death of nearly 70,000 Peruvians. Orin Starn and Miguel La Serna’s narrative history of Shining Path is both panoramic and intimate, set against the socioeconomic upheavals of Peru’s rocky transition from military dictatorship to elected democracy. They take readers deep into the heart of the rebellion, and the lives and country it nearly destroyed. We hear the voices of the mountain villagers who organized a fierce rural resistance, and meet the irrepressible black activist María Elena Moyano and the Nobel Prize–winning novelist Mario Vargas Llosa, who each fought to end the bloodshed. Deftly written, The Shining Path is an exquisitely detailed account of a little-remembered war that must never be forgotten.
This book explores the history and legacy of monuments to the fallen from the Francoist side in the Spanish Civil War. Del Arco Blanco studies thousands of monuments in towns and cities across Spain to provide a detailed account of the history and memory of the civil war, Francoism, and the transition to democracy. Chapters in the book focus on the myth of those said to have 'fallen for God and for Spain'—a phrase that encapsulated and shaped the dichotomy between ‘good’ and ‘bad’ Spaniards. They also focus on the use of monuments to control political and ideological ideals and to legitimise the Francoist dictatorship. Further chapters study Spanish society’s struggle to deal with its past of mass killing, denial, and exclusion. Del Arco Blanco also pays attention to the way the Francoist authorities used monuments and memory for their political and ideological advantage and to control people, power as well as the political agenda. The book draws on extensive research to reconstruct both the specific history of monuments scattered throughout the country and their role within manipulative Francoist memory of the Spanish Civil War. In these ways, monuments helped shape the Francoist narrative and memory, but they also became part of the landscape of contemporary Spanish history. This book is an excellent resource for postgraduate students and professional researchers studying the aftermath of the Spanish Civil War, and the influence of monuments on the construction of national memory, culture, and society in Spain both at the time and through to the present day.
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