Moving the Stars
Author: Peter Schuster
Publisher: Living Edition
It is now 150 years ago, on 25th May 1842, that the son of a Salzburg ston emason presented a scientific work "On the coloured light of the double stars and certain other heavenly bodies" at a meeting of the Royal Bo hemian Society of Sciences held in Prague. Christian Andreas Doppler, then professor at the Prague Technical Institute, set a milestone in scien tific history in the meeting room of the Royal Society in the Charles Uni versity, just a few meters from the National Theatre where another genius from Salzburg, Wolfgang Amadeus Mozart, had celebrated his musical triumph with the premiere of his opera Don Giovanni fifty-five years earlier. Doppler's lecture set out in brilliant simplicity what we now call the Doppler principle, which since has found numerous uses in astronomy, which was of primary interest to Christian Doppler. In addition, it has found countless practical applications in physics, navigation, aeronautics, geodesy, medicine, science and technology. In medicine alone, Doppler sonography is now an established diagnostic procedure in the fields of childbirth, cardiology and diseases of the blood vessels, neurology, neuro surgery and vascular surgery, and is continually finding new medical appli cations in today's world of high technology.
Author: Ewald Hiebl
Publisher: Living Edition
A New Doppler Effect
Author: Florian Ion Petrescu
Publisher: BoD – Books on Demand
The Doppler effect (or Doppler shift), named after Austrian physicist Christian Doppler who proposed it in 1842 in Prague, is the change in frequency of a wave for an observer moving relative to the source of the wave. It is commonly heard when a vehicle sounding a siren or horn approaches, passes, and recedes from an observer. The received frequency is higher (compared to the emitted frequency) during the approach, it is identical at the instant of passing by, and it is lower during the recession. The relative changes in frequency can be explained as follows. When the source of the waves is moving toward the observer, each successive wave crest is emitted from a position closer to the observer than the previous wave. Therefore each wave takes slightly less time to reach the observer than the previous wave. Therefore the time between the arrival of successive wave crests at the observer is reduced, causing an increase in the frequency. While they are travelling, the distance between successive wave fronts is reduced; so the waves \\\\\\\"bunch together\\\\\\\." Conversely, if the source of waves is moving away from the observer, each wave is emitted from a position farther from the observer than the previous wave, so the arrival time between successive waves is increased, reducing the frequency. The distance between successive wave fronts is increased, so the waves "spread out." For waves that propagate in a medium, such as sound waves, the velocity of the observer and of the source is relative to the medium in which the waves are transmitted. The total Doppler Effect may therefore result from motion of the source, motion of the observer, or motion of the medium. Each of these effects is analyzed separately. For waves which do not require a medium, such as light or gravity in general relativity, only the relative difference in velocity between the observer and the source needs to be considered.
Author: Source Wikipedia, Books LLC
Publisher: Books LLC, Wiki Series
Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. Pages: 28. Chapters: Doppler effect, Redshift, Christian Doppler, ber das farbige Licht der Doppelsterne und einiger anderer Gestirne des Himmels, Relativistic Doppler effect, Doppler cooling, Photoacoustic Doppler effect, Lorentz factor, Doppler imaging, Doppler broadening, Ives-Stilwell experiment, Laser Doppler velocimetry, K correction, Blueshift, Photometric redshift, Rossiter-McLaughlin effect, Inverse Doppler effect, Dopplergraph, Differential Doppler effect. Excerpt: In physics (especially astrophysics), redshift happens when light seen coming from an object is proportionally increased in wavelength, or shifted to the red end of the spectrum. More generally, where an observer detects electromagnetic radiation outside the visible spectrum, "redder" amounts to a technical shorthand for "increase in electromagnetic wavelength" - which also implies lower frequency and photon energy in accord with, respectively, the wave and quantum theories of light. Redshifts are attributable to the Doppler effect, familiar in the changes in the apparent pitches of sirens and frequency of the sound waves emitted by speeding vehicles; an observed redshift due to the Doppler effect occurs whenever a light source moves away from an observer. Cosmological redshift is seen due to the expansion of the universe, and sufficiently distant light sources (generally more than a few million light years away) show redshift corresponding to the rate of increase of their distance from Earth. Finally, gravitational redshifts are a relativistic effect observed in electromagnetic radiation moving out of gravitational fields. Conversely, a decrease in wavelength is called blue shift and is generally seen when a light-emitting object moves toward an observer or when electromagnetic radiation moves into a gravitational field. Although observing redshifts and blue shift...
Expanded and updated edition highlighting current standards and breakthroughs in the technology of Doppler ultrasound Includes latest advances in 3D and color doppler and 4D fetal echocardiography Includes more than 500 illustrations, including more than 150 in color
Die Fakultät für Technische Chemie stellt sich vor! In fünf Kapiteln werden die geschichtliche Entwicklung der Chemie und der Verfahrenstechnik von der Gründung des k. k. polytechnischen Institutes 1815 bis zur Technischen Universität Wien 2015, aktuelle Highlights in der Forschung der Fakultät für Technische Chemie, die moderne Großgeräte- und Gebäudeinfrastruktur, die Lehre sowie die Kontaktpflege zu den Alumnae und Alumni behandelt. Ohne Anspruch auf Vollständigkeit wird ein lebendiges Bild einer sowohl in der Lehre als auch in der Forschung erfolgreichen Fakultät am runderneuerten Campus Getreidemarkt gezeichnet.
Author: Christian Doppler
Author: Source Wikipedia, LLC Books
Publisher: Books LLC, Wiki Series
Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. Pages: 94. Chapters: Johnny Weissmuller, Christian Doppler, Herbert Bayer, Robert Musil, Egon Schiele, Rudolf Steiner, Hermann Oberth, Ferdinand Blumentritt, Ficquelmont family, Joseph Radetzky von Radetz, Ludwig Greiner, Vladimir Logothetti, Heinrich Kaan, Hugo II Logothetti, Constantin von Economo, Carl Ferdinand Cori, Ladislaus Hengelm ller von Hengerv r, Alois Podhajsky, Rudolf Geschwind, List of counts of Austria-Hungary, Julius Podlipny, John Lhotsky, Franz von Supp, J zsef T rley, Karl Kautsky, Princess Pauline von Metternich, Teresa Stolz, Raoul Stojsavljevic, Rudolf Weigl, Clary-Aldringen, d n von Horv th, Heimito von Doderer, Count Kasimir Felix Badeni, Gustav Schwarzenegger, Richard Yary, Albin Francisco Schoepf, P l Kray, Dora Peja?evi?, Gabriel von Max, Lajos Egri, Stephan Schulzer von M ggenburg, Alexander Moissi, August von Spiess, Heinrich von Ferstel, Ethnic and religious composition of Austria-Hungary, Franz Doppler, ?or?e Vajfert, Ferencz Gyulai, Otto Mahler, Josef Kainz, Count Richard Belcredi, Alois Musil, Heinrich von Coudenhove-Kalergi, Alexander von Mensdorff-Pouilly, Prince Dietrichstein von Nicolsburg, Joseph Beck, Ottokar Nov ek, Leopold Drucker, G za Fej rv ry, Ede Rem nyi, Konrad Grallert von Cebr w, Isidor Kaufmann, Ludwig von H hnel, Johann Joseph Thalherr, Carl Heitzmann, Nikolaus von xk ll-Gyllenband, Count Franz Philipp von Lamberg, Johann von Dumreicher, Paul Czinner, R za Csillag, Ottokar Chiari, Luigi Kasimir, Elisabeth Rad, Joseph B hm, Sigmund Friedl, Karol Lanckoro?ski, Karl Zsigmondy, Ladislaus Weinek, Heinrich Gr nfeld, Joseph Zaehnsdorf, Victor Adler, Anton Gindely, Friedrich Leo von Rottenberger, Eduard Bitterlich, Anton Freissler, Count Johann Nepomuk Wilczek, Moritz von Auffenberg, Adolf Zsigmondy, Wilhelm Blaschke, Rudolf P ch, Ludwig Redtenbacher, Joseph Hardtmuth, Albert Schickedanz, ...
This convenient, concise version of the best-selling Mosby’s Dictionary of Medicine, Nursing, and Health Professions provides condensed definitions to incorporate only the most essential information. Mosby’s Pocket Dictionary includes all of the information you need, including content on diseases, procedures, equipment, drugs, and so much more. Screened thumb tabs make it easy to locate definitions quickly, and a list of common medical abbreviations printed in the front and back covers make this a perfect reference for clinical practice. UNIQUE! Emphasis on nursing and health science terminology makes this the most useful pocket dictionary for students and practitioners in nursing and health professions. Its small size makes it easy to transport, and the sturdy, flexible cover increases the durability. The practical, straightforward alphabetical organization with no subentries and easy-to-use thumb tabs make it easy to find and understand information. UNIQUE! A section on nursing diagnoses with entries for all NANDA-approved nursing diagnoses prepares you for real-world practice. British spellings for selected entries help you recognize alternate spellings. Etymologies aid your understanding of medical terminology and help you develop a professional vocabulary. Pronunciations provided for key entries help you use terminology correctly in everyday practice. Includes 38,700 definitions, with over 5,000 new and 25,000 revised definitions, to reflect the latest information in all areas of nursing, medicine, and health professions. UNIQUE! Current definitions for all NANDA nursing diagnoses, NIC (Nursing Interventions Classifications) and NOC (Nursing Outcomes Classifications) ensure you have the most up-to-date information for clinical documentation, communication, and care evaluation.
Every few years a dissertation comes to the area of clinical application of medical technology which carries us forward as on a magic carpet into new regions of understanding and patient care. This book is such a magic carpet. It brings together, in a clear and incisive fashion, important hemodynamic principles with a simple noninvasive method of application to a part of the cerebral vasculature which has been relatively inaccessible. To the lucky and perceptive person who reads this book, a feeling of excitement and hope for progress is engendered. The diligent application of the potentials of transcranial Doppler ultrasound brings new power to our efforts in understanding the cerebral circulation and the causes, treatment and prevention of cerebrovascular disorders. Merrill P. Spencer, M. D. Director Institute of Applied Physiology and Medicine Seattle, Wash. , July 1986 Acknowledgements I am greatly indebted to Prof. He1ge Nornes, Oslo, who introduced me to the fascinating study of cerebral hemodynamics in the early 1970's and since then continually encouraged my interest in this field. It was through his pioneering work on the cerebral circulation-using peroperative electromagnetic flowmetry and Doppler techniques-that the basis was laid for the noninvasive trans cranial approach to the circle of Willis described in this book. I also gratefully acknowledge the stimulating case discussions with Prof. Peter Huber, Berne, at the very early introduction of trans cranial Doppler, the inspiring exchange of ideas with Dr. Merrill P.
Laser-Doppler Blood Flowmetry
Author: A.P. Shepherd, P.Å. Öberg
Publisher: Springer Science & Business Media
The dance along the artery The circulation on the lymph Are figured in the drift of stars. T. S. Eliot Die Methode ist alles. Carl Ludwig In physiology a spirit of finesse is required. Claude Bernard Armed with modern Doppler instrumentation, scientists can now quantify the red blood cell's "dance along the artery" as well as "the drift of stars. " In disciplines of science and medicine ranging from cardiology to astronomy, the Doppler principle now provides invaluable velo city measurements in the microcosm of capillary beds and in the cosmos. The newest appiication of the ubiquitous Doppler principle, laser-Doppler velocimetry, has been used to measure blood ftow in tissue for just a few years, but we perceived that, like most new techniques, the birth of laser-Doppler blood ftowmetry was not easy, nor was it likely to pass through infancy and reach maturity without difficulty. In physiology and medicine, better techniques for measur ing blood ftow are constantly in demand, but they often exhibit an unfortun ate boom-and-bust cyde: widespread acceptance and uncritical use are soon xiii xiv Preface followed by studies delineating the limits of the method's validity. The technique is then abandoned for the next more fashionable one, thus proving Ludwig's dictum that a given method is everything or nothing depending upon whether one can believe the data it yields.
Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. Hephaestus Books represents a new publishing paradigm, allowing disparate content sources to be curated into cohesive, relevant, and informative books. To date, this content has been curated from Wikipedia articles and images under Creative Commons licensing, although as Hephaestus Books continues to increase in scope and dimension, more licensed and public domain content is being added. We believe books such as this represent a new and exciting lexicon in the sharing of human knowledge. This particular book contains chapters focused on Burials in Venice, Burials at Isola di San Michele, Burials at Saint Mark's Basilica, and Venice.