Download or read book Generating Pictures from Waves written by Anthony Joseph Accardi and published by . This book was released on 2010 with total page 177 pages. Available in PDF, EPUB and Kindle. Book excerpt: The research communities, technologies, and tools for image formation are diverse. On the one hand, computer vision and graphics researchers analyze incoherent light using coarse geometric approximations from optics. On the other hand, array signal processing and acoustics researchers analyze coherent sound waves using stochastic estimation theory and diffraction formulas from physics. The ability to inexpensively fabricate analog circuitry and digital logic for millimeter-wave radar and ultrasound creates opportunities in comparing diverse perspectives on image formation, and presents challenges in implementing imaging systems that scale in size. We present algorithms, architectures, and abstractions for image formation that relate the different communities, technologies, and tools. We address practical technical challenges in operating millimeter-wave radar and ultrasound systems in the presence of phase noise and scattering. We model a broad class of physical phenomena with isotropic point sources. We show that the optimal source location estimator for coherent waves reduces to processing an image produced by a conventional camera, provided the sources are well separated relative to the system resolution, and in the limit of small wavelength and globally incoherent light. We introduce quasi light fields to generalize the incoherent image formation process to coherent waves, offering resolution tradeoffs that surpass the traditional Fourier uncertainty principle by leveraging time-frequency distributions. We show that the number of sensors in a coherent imaging array defines a stable operating point relative to the phase noise. We introduce a digital phase tightening algorithm to reduce phase noise. We present a system identification framework for multiple-input multiple-output (MIMO) ultrasound imaging that generalizes existing approaches with time-varying filters. Our theoretical results enable the application of traditional techniques in incoherent imaging to coherent imaging, and vice versa. Our practical results suggest a methodology for designing millimeter-wave imaging systems. Our conclusions reinforce architectural principles governing transmitter and receiver design, the role of analog and digital circuity, and the tradeoff between data rate and data precision.
Download or read book Millimeter wave Generation with Electron beam Devices written by Bernhard Kulke and published by . This book was released on 1966 with total page 44 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Water Waves Generated By Underwater Explosion written by Bernard Le Mehaute and published by World Scientific. This book was released on 1996-04-16 with total page 389 pages. Available in PDF, EPUB and Kindle. Book excerpt: This is the first book on explosion-generated water waves. It presents the theoretical foundations and experimental results of the generation and propagation of impulsively generated waves resulting from underwater explosions. Many of the theories and concepts presented herein are applicable to other types of water waves, in particular, tsunamis and waves generated by the fall of a meteorite. Linear and nonlinear theories, as well as experimental calibrations, are presented for cases of deep and shallow water explosions. Propagation of transient waves on dissipative, nonuniform bathymetries together with laboratory simulations are analyzed and discussed.
Download or read book Advanced Technologies Based on Wave and Beam Generated Plasmas written by H. Schlüter and published by Springer Science & Business Media. This book was released on 2013-06-29 with total page 580 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book draws together three areas of work on plasma technologies: advanced efforts based on wave generated, high frequency plasmas, plasma assisted ion implantation, and electron beam generated plasma. It lays a foundation for the application of sources in industry and various research areas
Download or read book Flow Over a Moving Boundary in Relation to Wind generated Waves written by Konstantin Zagustin and published by . This book was released on 1966 with total page 204 pages. Available in PDF, EPUB and Kindle. Book excerpt: Because the mechanisms for transfer of energy from the wind to wind-generated water waves are not fully known or understood, the present work is focused on a theoretical and experimental examination of the boundary conditions at the air-water interface. Two limiting conditions of wave formation are investigated. First, the case of small amplitude waves is considered. Theories of linear type are available and the work of Miles, Benjamin and Lighthill is reviewed. Experiments were performed on a laboratory model in which a belt driven at a constant speed and following the shape of the wave reproduced the moving boundary conditions at the surface of the wave. Water was used as a working fluid. Within the limitations of experimental accuracy the data seem to verify Miles' mechanism of energy transfer from wind to wave for the growth of already-formed small amplitude waves. Second, the case of a sharp crested limiting wave is considered. The flow is assumed to separate at one crest of the wave and close at the other, forming a closed separated region, and a mathematical model, in which the air flow is irrotational outside the separated region and rotational with a continuous distribution of vorticity inside that region, in constructed. Flow visualization experiments, in which the velocity distribution on the wave surface was approximately reproduced, confirmed the crest-to-crest hypothesis and the main flow characteristics obtained from the mathematical model. (Author).
Download or read book Wake Collapse and Subsequent Generation of Internal Waves in a Density Stratified Medium written by Jin Wu and published by . This book was released on 1968 with total page 106 pages. Available in PDF, EPUB and Kindle. Book excerpt: An experimental technique was developed to model a two-dimensional mixed region collapsing in a continuously density-stratified medium. The process of this mixed region can be divided into three stages. Empirical formulae were derived to describe the process of the first two stages, during which densimetric effects determine the modeling criterion. The collapse process in the final stage is complicated by viscous effects including mixing at the thin wake tip. The pattern of the internal waves generated by the initial impulsive collapse of the mixed region was studied; it can be represented by moving rays connecting either wave crests or troughs. These rays move away from the collapse center and at the same time decrease their slopes. A simpler steady state wave pattern generated by an oscillating plunger was also studied. Taken together, these experimental results are interpreted to show that the energy density of the initial impulsive collapse is skewed toward higher frequencies and that it is peaked at 8/10 of the Brunt-Vaisala frequency. The mechanism underlying the moving ray patterns is explained. (Author).
Download or read book Response of Structures to Aircraft Generated Shock Waves written by and published by . This book was released on 1959 with total page 158 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Effect of Fetch Width on Wave Generation written by Thorndike Saville and published by . This book was released on 1954 with total page 22 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Crash Course Cardiology written by Thomas Foster and published by Elsevier Health Sciences. This book was released on 2018-11-08 with total page 258 pages. Available in PDF, EPUB and Kindle. Book excerpt: Crash Course – your effective every-day study companion PLUS the perfect antidote for exam stress! Save time and be assured you have the essential information you need in one place to excel on your course and achieve exam success. A winning formula now for over 20 years, each series volume has been fine-tuned and fully updated – with an improved full-colour layout tailored to make your life easier. Especially written by senior students or junior doctors – those who understand what is essential for exam success – with all information thoroughly checked and quality assured by expert Faculty Advisers, the result are books which exactly meet your needs and you know you can trust. Each chapter guides you succinctly through the full range of curriculum topics, integrating clinical considerations with the relevant basic science and avoiding unnecessary or confusing detail. A range of text boxes help you get to the hints, tips and key points you need fast! A fully revised self-assessment section matching the latest exam formats is included to check your understanding and aid exam preparation. The accompanying enhanced, downloadable eBook completes this invaluable learning package. Series volumes have been honed to meet the requirements of today’s medical students, although the range of other health students and professionals who need rapid access to the essentials of cardiology will also love the unique approach of Crash Course. Whether you need to get out of a fix or aim for a distinction Crash Course is for you! Provides the exam syllabus in one place - saves valuable revision time Written by senior students and recent graduates - those closest to what is essential for exam success Quality assured by leading Faculty Advisors - ensures complete accuracy of information Features the ever popular 'Hints and Tips' boxes and other useful aide-mémoires - distilled wisdom from those in the know Updated self-assessment section matching the latest exam formats – confirm your understanding and improve exam technique fast
Download or read book Micro Nanorobots in Nanobiotechnology written by Fengtong Ji and published by Frontiers Media SA. This book was released on 2024-07-18 with total page 126 pages. Available in PDF, EPUB and Kindle. Book excerpt: Micro/nanorobots have emerged as functional agents and versatile tools for investigating the complex microenvironments within biological systems. Operating at a scale comparable to cells, these micro/nanorobots offer controllable motion and customizable characteristics, whilst swarming micro/nanorobots exhibit exceptional efficiency, robustness, and adaptivity. As a result, these active particles hold significant potential for interacting with living cells, diseased tissues, and organs, offering viable approaches to uncovering natural principles of development and addressing diseases such as drug-tolerant infections and bacterial self-organization. To tackle these challenges, functionalized micro/nanorobots, through active intervention, can yield substantial effects on the development and treatment of cellular environments, bacterial biofilms, and tissue restoration. In this regard, we are organizing a special issue to delineate the current state of the art of micro/nanorobots in biological contexts and to advance therapeutics by elucidating the underlying mechanisms in living systems. In the contemporary era of advancing nanomedicine, the utilization of micro/nanorobots in clinical therapy is still in its nascent stages within the realm of modern healthcare. Biomedical and biological environments hold immense promise as platforms for these active agents, showcasing remarkable functionalities and efficacy in vitro, ex vivo, and in vivo. Micro/nanorobots have the capacity to emulate the behaviors of living cells, particularly bacteria, which play a crucial role in microbial infections, thus impacting public health and medical devices. These active agents possess the potential to overcome biological barriers and enable targeted therapies for various healthcare issues, including the prevention and treatment of diseased tissues and biofilms, which will significantly enhance the minimally invasive operations and remote treatments for the next-generation human healthcare system. The objectives of this research topic are threefold: (1) to investigate the novel functionalities of micro/nanorobots in biological contexts, (2) to unravel the underlying principles of cell, tissue, and organ development, and (3) to innovate active therapeutic approaches for addressing diseased tissues and microbial biofilms
Download or read book The Complete Idiot s Guide to Lowering Your Cholesterol written by Dr. Joseph Klapper and published by Penguin. This book was released on 2006-11-07 with total page 316 pages. Available in PDF, EPUB and Kindle. Book excerpt: Cardiologist Joseph Lee Klapper, M.D., gives an in-depth yet accessible explanation of cholesterol levels and explores ways to lower them. Weighing the pros and cons of a variety of approaches, including a holistic approach, Western medications, natural remedies, and new methods on the horizon, he then takes you step-by-step through a medically proven plan for shedding cholesterol points. By 2010, the leading cause of death worldwide will be heart disease, far greater than infections, AIDS and other killers. Explores many contemporary heart-smart diets and provides sample menus. Important information about exercise, risk factors, statins and other Westen cholesterol lowering medications; herbs, supplements, and natural remedies; and antioxidants, gene therapy, and new drugs.
Download or read book Canal Bank Erosion Due to Wind generated Water Waves written by William W. Sayre and published by . This book was released on 1961 with total page 132 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Wave Variability and Wave Spectra for Wind generated Gravity Waves written by United States. Beach Erosion Board and published by . This book was released on 1959 with total page 208 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Gravity Waves written by United States. National Bureau of Standards and published by . This book was released on 1952 with total page 300 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Hyperbolic Equations and Waves written by Marcel Froissart and published by Springer Science & Business Media. This book was released on 2013-11-11 with total page 403 pages. Available in PDF, EPUB and Kindle. Book excerpt: The success of the 1967 Battelle Rencontres was so much appre ciated by the participants and organizers of this experimental set-up that it was soon decided to go on with the experiment. Mathematicians and physicists had found a very suitable frame to overcome their natural shyness, to get occasionally interested into each others' work, to talk 1968 Rencontres have about it, and eventually to know each other. The been organized with the same idea in mind, and even somewhat enlarged in the following sense: the topic chosen - hyperbolic equations and waves - has proved a cornerstone of physics for more than a century and extends over most fields of contemporary physics. It follows immediately that the wide range of physicists concerned could not be represented by more than a couple of specialists in any single field. Thus, aside from bridging the gap between mathematicians and physicists, the 1968 Recontres provided a rather unique occasion to plug many intra disciplinary gaps among physicists. This made the Rencontres quite unpredictable as to how people would - and could - interact, and created a very stimulating environ ment for an unprecedented intellectual venture. From the outside, it may very well look like a hodge-podge of quite unrelated ideas. But it was much less so at the level of day-to-day discussions and informal gatherings where all slowly acquired a comprehensive synthetic view of the subject.
Download or read book Official Gazette of the United States Patent Office written by United States. Patent Office and published by . This book was released on 1964 with total page 1660 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Wave watching with Pauline written by Mirjam Sophia Glessmer and published by BoD – Books on Demand. This book was released on 2020-12-20 with total page 26 pages. Available in PDF, EPUB and Kindle. Book excerpt: Pauline and her aunt are going for a walk to look at water. They discover waves that were made by wind and ships, and even by rain drops, ducks and fish! Do you want to come along?
