Fysik

In recent decades, twistor theory has grown into an irreplaceable tool for the study of scattering amplitudes in gauge theory and gravity. This book introduces the reader to cutting-edge advances in twistor theory and its applications to general relativity. The problem of graviton scattering in four dimensions is shown to be dual to dramatically simpler computations in a two-dimensional CFT known as a twistor sigma model. Twistor sigma models are the first step toward a holographic description of gravity in asymptotically flat space-times. They underpin the infinitely many asymptotic symmetries of flat space physics discovered in celestial holography, and extend them to exciting new arenas like curved space-times. They also yield intrinsically mathematical results in the field of hyperkähler manifolds. This volume will be of broad interest to students and researchers looking for an accessible entry point into twistor geometry, scattering amplitudes, and celestial holography. It will also provide an invaluable reference for specialists by bringing together results from a host of different disciplines.

This volume commemorates the scientific contributions of Detlef Dürr (1951¿2021) to foundational questions of physics. It presents new contributions from his former students, collaborators, and colleagues about their current research on topics inspired or influenced by Dürr. These topics are drawn from physics, mathematics, and philosophy of nature, and concern interpretations of quantum theory, new developments of Bohmian mechanics, the role of typicality, quantum physics in relativistic space-time, classical and quantum electrodynamics, and statistical mechanics. The volume thus also gives a snapshot of present research in the foundations of physics.

A guide to implementing the teachings of the bardos of life and death from the classic text, The Tibetan Book of the Dead

In this important book, Rebecca Carson develops the concept of "immanent externalities" to grasp the non-capitalist life processes produced by-and necessary for-capitalist reproduction. Immanent Externalities thus considers the category of reproduction by means of a philosophical re-reading of the three volumes of Marx's Capital. In doing so, the book locates capitalism's fundamental contradiction as that between the reproduction of profit-driven activity and ecologically situated human life, suggesting new orientations for theory and practice today.

"Photorealism is a genre of painting that developed in the United States and Europe using high-resolution photography as its primary source material. Embracing digital photography perhaps more than any other artist working in this genre, French-born Bertrand Meniel (1961-) is able to incorporate an astonishing amount of detail into his renderings of cityscapes in New York City, Miami, and Paris. Primarily self-taught and with no preliminary experimental, developmental, or student work, by 1996 Meniel was creating works with powerful, distinctive, and very original imagery, having mastered techniques and skills that normally require a lifetime. Using a variety of photographs of his chosen subject, he manipulates an image to perfection, focusing simultaneously on the foreground and background by combing hundreds of shots on a computer screen. His choice to depict iconic American scenes in his paintings, particularly those associated with the "American Way of Life," reflects not just a technical mastery of Photorealism but a deep emotional connection to the culture that captivated him during his youth. His unique perspective, influenced by French artistic traditions and shaped by exposure to American pop culture, allows him to capture in his art the essence of what may be best described as the "New York State of Mind.""--

Potentia of Poverty opposes to the surplus-value of capital a surplus-concept of life-of the worker, of the non-worker, of the poor, of the rich: an excess of being with the power to undo capital by using its own mechanism.Antonio Negri writes in the preface that "The poor is the powerful, Pascucci tells us. She interprets Marx as a reader of Spinoza; however, maybe there is something more here than there is in Spinoza and Marx themselves. A further passage is necessary to grasp this "more": namely, to tie the experience of poverty to an ontology of "cupiditas" [desire], that is, of "amor" [love]".

Andy Blunden completes his immanent critique of Activity Theory, begun in 2010 with An Interdisciplinary Theory of Activity.A summary of the ontological foundations of Activity Theory introduces a critical review of the work of activity theorists across the world with a focus of applications in medical and educational contexts, and concludes with a review of the ethics of collaboration. Blunden expands the domain of Activity Theory to address the pressing problems facing humanity today and activities lacking in clear objects, collaboration in voluntary projects and social movements, the life projects of individuals and emerging practices. Blunden brings an understanding of Marxist and Hegelian philosophy to bear on the application of Activity Theory to problems of social change.

This book highlights the photogalvanic effects at low dimensions, surfaces, and interfaces, more specifically 2D materials, such as graphene and monolayer transition metal dichalcogenides. Although the phenomenology of the photogalvanic effects, which can be simply seen as photoresponse nonlinear-in-electric field, have been well-established, the microscopic understanding in each material system may vary. This book is a quick reference and a detailed roadmap starting from phenomenology and continuing with the ultimate low dimensional materials, in which the photogalvanic effects can offer a rich platform at the second-order response to an electric field. A general phenomenology of photogalvanic effect is provided in the first chapter, together with the photon drag effect which also generates a photocurrent like the photogalvanic effect, but with some distinct features, as well as somewhat puzzling similarities. Next two chapters explain these effects in graphene, starting with a necessary related background on graphene, then a particular focus on its specific phenomenology, microscopic theory, and experimental results. In a similar fashion, in chapters four and five, a necessary background for the photogalvanic effects in monolayer transition metal dichalcogenides, with symmetry analysis, microscopic theory, and experimental results is presented, along with the Berry curvature dependent photocurrent, which can also play an important role in 2D semiconductors. The second-order photogalvanic effects that have been covered so far in graphene and monolayer transition metal chalcogenides have already excited the 2D semiconductor optoelectronic research community by several means. It seems that the interests on the photogalvanic effects will continue to escalate in near future.

Un profesor de estudios religiosos documenta meticulosamente sus ideas a partir de 73 sesiones de altas dosis de LSD realizadas a lo largo de 20 años

This book highlights the basic theories and technical principles of the synthetic aperture radar (SAR), aiming to bridge theories and applications for readers. Supported by the practical experience of the author's dedicated research, this book also constructs the SAR theoretical system from multiple perspectives.The synthetic aperture radar (SAR) is a weather-independent microwave remote sensing device that involves a number of multidisciplinary fields such as signal processing and image information processing. Written by experts in remote sensing and signal processing, the book explains the signal echo modeling, imaging principles and algorithms, image quality control methods, and image applications. Readers are provided with concise descriptions of commonly used imaging algorithms for SAR in multiple regimes, modes, and applications, including the Range Doppler Algorithm (RDA) and the Frequency Scaling Algorithm (FSA). Continuous wave/pulse regime SAR technology, inverse synthetic aperture radar (ISAR) technology, digital beam forming (DBF), interferometry, and moving target detection methods are discussed in detail.The book is a must-read and comprehensive reference for researchers and engineers engaged in the R&D of the SAR and for graduate students interested in the field.

This book provides an advanced introduction to extended theories of quantum field theory and algebraic topology, including Hamiltonian quantization associated with some geometrical constraints, symplectic embedding and Hamilton-Jacobi quantization and Becchi-Rouet-Stora-Tyutin (BRST) symmetry, as well as de Rham cohomology. This extended new edition offers a multifaced insight into phenomenology of particles such as baryons and photons, in terms of extended objects. In particular, in the second edition, the baryons are described in hypersphere soliton model, and the photon properties are additionally included in stringy photon model and in Dirac type relativistic quantum mechanics for a photon.It offers a critical overview of the research in this area and unifies the existing literatures, employing a consistent notation. Although the results presented apply in principle to all alternative quantization schemes, special emphasis is placed on the BRST quantization and its de Rham cohomology group which contribute to a deep understanding of constrained physical theories. The book describes how solitons and other models subject to constraints include rigorous treatments of the geometrical constraints which affect the predictions themselves. The book is intended for use by any graduate-level student with quantum field and relativity theories, and it also serves as a useful reference for those working in the field. An extensive bibliography guides the reader toward the source literature on particular topics.

This book comprises the proceedings of the Conference and Exhibition on Non-Destructive Evaluation (NDE 2021) organised by the Indian Society for Non-destructive Testing (ISNT). This book covers topics from wide domains from conventional to advanced NDE, including conventional and advanced NDE methods, drone-based inspections, thermal wave imaging, NDT data fusion, material characterization, waveguide sensors, inspections of civil structures, medical applications such as bone density and cancer diagnosis, periodic maintenance, life estimation, as well as structural integrity and related areas. This book serves as a useful reference for students, researchers, and practitioners alike.

This edited volume presents perspectives from computer science, information theory, neuroscience and brain imaging, aesthetics, social sciences, psychiatry, and philosophy to answer frontier questions related to artificial intelligence and human experience. Can a machine think, believe, aspire and be purposeful as a human? What is the place in the machine world for hope, meaning and transformative enlightenment that inspires human existence? How, or are, the minds of machines different from that of humans and other species? These questions are responded to along with questions in the intersection of health, intelligence and the brain. It highlights the place of consciousness by attempting to respond to questions with the help of fundamental reflections on human existence, its life-purposes and machine intelligence. The volume is a must-read for interdisciplinary and multidisciplinary researchers in humanities and social sciences and philosophy of science who wish to understand the future of AI and society.

This groundbreaking book, one of four on the 'elements', presents interdisciplinary approaches to the topic of water in the Middle Ages, ranging geographically across Europe and beyond and chronologically from the fourth century CE to the sixteenth.

Albert Camus is the subject of many misunderstandings. Jean-François Mattéi proposes to dispel them by offering us an innovative reading of this philosopher's work. A clear, fascinating little book for (re)discovering Camus.

A memoir of the infamous “last Surrealist” amid the heady militancy of May ’68.Alain Segura was a teenage anarchist in Paris during the mid-to-late 1960s when he hung around with members of the Enragés and the Situationist International. He was particularly captivated by Yugoslavian militant, poet, and painter Marianne Ivsic, a member of André Breton’s Surrealist group. It was Guy Debord who approvingly called her “the last Surrealist.”A Season with Marianne details the heady days of friendship, rebellion, and creative militancy surrounding May ’68, against the backdrop of a colossal split between the Anarchist International and the Situationists in 1967, and the impossible demands of a revolution briefly glimpsed.

Each of the "Keys to the Kingdom" Advanced Training Course Manuals will further a Seekers reach on the Pathway leading out of this Universe.

Ferdinand Ulrich has been hailed by some as one of the greatest Catholic philosophers of the Twentieth Century. Though he ceased writing in the 1980s, his works are only now being translated into English. The three works collected in this volume present dimensions of Ulrich's unique philosophical anthropology, which he developed in the light of the metaphysics laid out in Homo Abyssus. The first work, Atheism and Incarnation, reflects on man's personal and cultural attempt to be fully human in the context of contemporary culture, showing how the question of God emerges right at the heart of this effort. The second work, Man in the Beginning: Towards a Philosophical Anthropology of Childhood, offers a remarkable metaphysical exploration of the child's development of personality in relation to his mother and father, in critical dialogue with several "prophets" of modern thought: Hegel, Marx, Nietzsche, and Freud. He shows that, far from presenting a problem that needs to be resolved or overcome, the child reveals a fundamental truth about human existence: namely, that we become ourselves in receiving ourselves from others. The third work, Prayer as the Fundamental Act of the Creature, presents what Hans Urs von Balthasar called a "summa" on prayer, which contains everything essential. One of the things that makes Ulrich's essay unique is his rooting of prayer, and so the encounter with God, in the person's very act of existence. This approach brings to light depths of the spiritual life that have rarely been explored before. Altogether, the three works offer a pathway into Ulrich's philosophy that is more accessible than that given in Homo Abyssus, and show some of the concrete implications of that earlier, groundbreaking work.

"Modern physics is dazzling. What is it about space that will not let an object move faster than light? Why does mass increase and time slow at extremely high velocities? Why is it impossible to know where a particle is if its momentum is known? In everyday experience, why do we feel acceleration but not velocity? These physical phenomena are well known, and their effects are easily calculated, but the dazzle remains. Why do they happen at extreme dimensions -- the very fast, the very small, the very massive, the very distant? The key revolves around the role of the observer, or, in other words, consciousness. Without an observer, the existence of an object itself becomes problematic. It is time to look again at what dimensions are and how they relate to consciousness"--

A deep archive of the secret histories of Chicago’s countercultural milieus over 30 years of community and artistic engagement.Way back in 1991, a freely-circulated zine called The Lumpen Times was born in Champaign, Illinois. The creators would go on to relaunch it in Chicago in 1993. Over time, the underground magazine would lead to building a Community of the Future.Through the certainty of chance, collective engagement, casual encounters, and accidental actions, The Lumpen Times became the hub for a series of cultural platforms spawning hundreds of projects, spaces, happenings, exhibitions, and initiatives. Some were short-lived, but each project fueled a new one in its wake. As an example, they started a record label, which spawned other publications. Other projects include engaging in dot-communism, opening community art spaces, hosting international art and activism festivals, and producing thousands of exhibitions and events. They also built an FM radio station, opened a bar, restaurants, launched a brewery, built another beverage company, created an artists’ retail shop, and started community kitchens. This range of passions has become an interconnected and deeply inclusive set of ventures now called The Buddy System.The Lumpen Times: 30+ Years of Radical Media and Building Communities of the Future shares stories from a few dozen of the thousands of Lumpen collaborators over the years. It contains a visual survey of the printed matter they produced over the past three decades, illustrating the evolution of the xeroxed-and-stapled zine into an internationally recognized cultural periodical.  The book is also a catalog of strategies, highlighting dozens of “case studies” demonstrating how artists, activists, educators, and creative entrepreneurs of all stripes have built community and culture in their beloved city of Chicago via the printed word, physical spaces, and over the airwaves and digital networks. Each study includes the reason it started, examples of its production, and the reasons it failed, mutated, or continues to this day.

What is the Commune? A leading radical historian looks at the global resurgence of the commune and asks how they can become sites of liberation.

The Emerald Guide to Ann Oakley is a comprehensive guide to reading and understanding the development of Oakley's sociological ideas, placing them in the context of her life and her ground-breaking research into domestic and gender sociology.