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Books > Science & Mathematics > Astronomy, space & time

Tiny Planetarium - See the stars! (Paperback): Nick Perilli Tiny Planetarium - See the stars! (Paperback)
Nick Perilli
R281 R262 Discovery Miles 2 620 Save R19 (7%) Ships in 9 - 17 working days

View your favorite constellations anytime, anywhere with the Tiny Planetarium! Bring the mystery and wonder of the night sky to your office or home with this charming miniature constellation projector! This kit includes: - a 3" star projector with a disk including 12 Hellenistic constellations - a 48-page illustrated mini book about the mythology and lore behind each constellation

The Invisible Universe - The Story of Radio Astronomy (Hardcover, 2nd ed. 2007): Gerrit Verschuur The Invisible Universe - The Story of Radio Astronomy (Hardcover, 2nd ed. 2007)
Gerrit Verschuur
R759 R673 Discovery Miles 6 730 Save R86 (11%) Ships in 18 - 22 working days

Hidden from human view, accessible only to sensitive receivers attached to huge radio telescopes, giant versions of backyard satellite dishes, the invisible universe beyond our senses continues to fascinate and intrigue our imaginations. We cannot really comprehend what it means to say that a galaxy is exploding, yet that is the nature of some of the distant radio sources in the furthest reaches of space. Closer to home, in the Milky Way galaxy, radio astronomers listen patiently to the ticking of pulsars that tell of star death and states of matter of awesome densities. And between the stars, radio emission from a host of over 120 complex molecules radiate outward to reveal a tale about chemical processes that produce the very stuff of life. And all of this happens out there in the universe hidden from our eyes, even when aided by the Hubble Space Telescope. This is the story of radio astronomy, of how radio waves are generated by stars, supernova, quasars, colliding galaxies, and by the very beginnings of the universe itself. with those huge dishes in the New Mexico desert, in a remote valley in Puerto Rico, in the green Pocahontas Valley in West Virginia, as well as dozens of other remote sites around the world. With each of these observatories, the scientists collect and analyze their data, listening to the radio signals from space, in order to learn what is out there, and perhaps even if someone else may be listening as well.

The Holographic Universe (Paperback, Reissue): Michael Talbot The Holographic Universe (Paperback, Reissue)
Michael Talbot
R316 R287 Discovery Miles 2 870 Save R29 (9%) Ships in 9 - 17 working days

'There is evidence to suggest that our world and everything in it - from snowflakes to maple trees to falling stars and spinning electrons - are only ghostly images, projections from a level of reality literally beyond both space and time.' This is the astonishing idea behind the holographic theory of the universe, pioneered by two eminent thinkers: physicist David Bohm, a former protege of Albert Einstein, and quantum physicist Karl Pribram. The holographic theory of the universe encompasses consciousness and reality as we know them, but can also explain such hitherto unexplained phenomena as telepathy, out-of-body experiences and even miraculous healing. In this remarkable book, Michael Talbot reveals the extraordinary depth and power of the holographic theory of the universe, illustrating how it makes sense of the entire range of experiences within our universe - and in other universes beyond our own.

Dark Energy - From EFTs to Supergravity (Hardcover, 1st ed. 2023): Francesc Cunillera Dark Energy - From EFTs to Supergravity (Hardcover, 1st ed. 2023)
Francesc Cunillera
R4,223 Discovery Miles 42 230 Ships in 18 - 22 working days

This book addresses supergravity and supergravity-motivated effective field theories in the context of cosmological model building. Extracting information about quintessence from string theory has attracted much attention in the past few years. The question became more urgent very recently after the possibility of obtaining de Sitter space was called into question. Therefore, there is an interesting debate as to whether de Sitter space or, even, quintessence can be derived from a fundamental theory, string theory or otherwise. This is a very active field of research, and the topics covered in the book render this work very timely. Throughout the book, special care has been taken in demonstrating historical relevance of the field and describing the set of open questions motivating the state-of-the-art research. The first few chapters in each part provide a detailed review of standard perturbative and non-perturbative techniques in supergravity model building, as a way to prepare the reader for the more technical and original subsequent chapters. These early chapters also represent a self-contained review that would be useful for anyone planning to enter this challenging area of study. The subsequent chapters detail research in supergravity-motivated effective field theories, in the first part, and supergravity models, in the second part. One of the important conclusions in this book is that modelling quintessence in perturbative string theory is at least as challenging as modelling de Sitter, placing the wider programme on a collision course with observations.

Genesis and Propagation of Cosmic Rays (Hardcover, 1988 ed.): M. M. Shapiro, John P. Wefel Genesis and Propagation of Cosmic Rays (Hardcover, 1988 ed.)
M. M. Shapiro, John P. Wefel
R5,409 Discovery Miles 54 090 Ships in 18 - 22 working days

M. M. Shapiro and J. P. Wefel AN OVERVIEW OF COSMIC RAY RESEARCH: COMPOSITION, ACCELERATION AND PROPAGATION J. P. Wefel PROPAGATION AND TRANSFOR'1ATIONS OF cosme RAYS: 41 FROM SOURCES TO EARTH R. Silberberg, C. H. Tsao, J. R. Letaw and M. M. Shapiro 71 ULTRA HEAVY NUCLEI IN THE COSMIC RADIATION W. R. Binns GALACTIC COSMIC RAY HYDROGEN AND HELIUM 91 J. J. Beatty COSMIC RAYS OF THE HIGHEST ENERGIES 97 J. Szabelski STARS AND COSMIC RAYS 105 I. COOL STARS T. Montmerle STARS AND COSMIC RAYS 131 II. HOT STARS T. Montmerle ON THE POSSIBLE CONTRIBUTION OF WC STARS TO ISOTOPIC 153 ANOMALIES IN COSMIC RAYS AND METEORITES J. B. Blake and D. S. P. Dearborn GAMMA-RAY VIEWS ON THE GALACTIC COSMIC-RAY DISTRIBUTION 163 H. Bloemen VlIl RADIO ASTRONOMY AND COSMIC RAYS 175 K. W. Weiler PARTICLE ACCELERATION IN GALACTIC SUPERNOVA REMNANTS 205 D. A. Green PULSARS AS COSMIC RAY PARTICLE ACCELERATORS -- NEW RESULTS 215 ON THE DYNAMICS OF PROTONS IN VACUUM FIELDS K. o. Thie1heim CONDITIONS FOR ACCELERATION OF SUPER-HIGH ENERGY COSMIC RAYS 227 IN ACTIVE GALACTIC NUCLEI W. H. Sorrell COSMIC RAYS AND A STABLE HYDROSTATIC EQUILIBRIUM OF THE GALAXY 235 H. B10emen VRE AND URE GAMMA P Y OBSERVATIONS BY GROUND BASED 241 DETECTORS W. Stamm 15 HADRON AND MUON COMPONENTS IN PHOTON SHOWERS AT 10 eV 255 Ch. P. Vankov and J. N. Stamenov MONOPOLES, MUONS, NEUTRINOS AND CYGNUS X-3 261 M. L. Cherry, S. Corbato, D. Kieda, K. Lande, and C. K.

Colors of the Sky - Images from Austin (Hardcover): Nick Stockland Colors of the Sky - Images from Austin (Hardcover)
Nick Stockland; Cover design or artwork by Romana Bovan; Contributions by Marcy McGuire
R627 R572 Discovery Miles 5 720 Save R55 (9%) Ships in 18 - 22 working days
Star Clusters in the Era of Large Surveys - Proceedings of Symposium 5 of JENAM 2010 (Hardcover, 2012): Andre Moitinho, Joao... Star Clusters in the Era of Large Surveys - Proceedings of Symposium 5 of JENAM 2010 (Hardcover, 2012)
Andre Moitinho, Joao Alves
R4,036 Discovery Miles 40 360 Ships in 18 - 22 working days

The symposium Star Clusters in the Era of Large Surveys was held in Lisbon on Sep 9-10 during the JENAM 2010. It served as a platform for discussing what and how recent, on-going and planned large-area ground-based and space-based surveys can contribute to producing a major leap in this research field, which has a strong European history.

Scientific topics addressed included: cluster searches, clustered vs. isolated star formation, large-scale star formation, enrichment of the field population, structure, populations and evolution of the Milky Way, cluster dynamics (internal and within the Milky Way), variability of stars in clusters (from time-resolved surveys), analysis techniques for large samples and archiving.

This proceedings book provides a snapshot of the ongoing discussion on the role of large surveys in star cluster research, and serves as a reference volume for the state-of-the art in the field.

Cutting-Edge Science - Up-to-the-Minute Discoveries, Facts and Inventions (Paperback): Colin Barras Cutting-Edge Science - Up-to-the-Minute Discoveries, Facts and Inventions (Paperback)
Colin Barras 1
R512 R453 Discovery Miles 4 530 Save R59 (12%) Ships in 10 - 15 working days

How did the atom bomb help save the elephant? Have we found the secret to eternal youth? Could a parasite be manipulating you right now? This dazzling collection of stories reveals the key recent breakthroughs in science, across all fields. Inside you will meet the killers lurking in Earth's ice, the super-coral that could save our seas and the neuroscientists hunting ghosts. You will travel beyond our galaxy to worlds where the sun sets twice, and beyond our time to a future where the Internet is unhackable and chickenosaurs roam the land. Divided into sections covering physics, space, humanity, the brain, plants and animals, and linking stories from different fields, Cutting-Edge Science offers a boundless journey of discovery for anyone with a passion for the world around them. Prepare to be shocked and amazed on every page.

Phaenomena - Doppelmayr's Celestial Atlas (Hardcover): Giles Sparrow Phaenomena - Doppelmayr's Celestial Atlas (Hardcover)
Giles Sparrow; Foreword by Martin Rees
R1,192 Discovery Miles 11 920 Ships in 10 - 15 working days

A beautiful showcase of Johann Doppelmayr's magnificent Atlas Coelestis that deconstructs its intricately drawn plates and explores its influential ideas. Showcasing Johann Doppelmayr's magnificent 1742 map of the cosmos, Atlas Coelestis, this spectacular guide to the heavens is also a superb introduction to the fundamentals and history of astronomy. Charting constellations, planets, comets and moons, Doppelmayr's Atlas presents the ideas and discoveries of many famous and influential astronomers, including Copernicus, Riccioli, Kepler, Newton and Halley, in intricate colour plates that interweave annotated diagrams and tables with figurative drawings and ornamental features. Here, you can appreciate the beauty of those exquisite astronomical and cosmographical plates and comprehend the details, which are also presented in step-by-step deconstructed form. Astronomer Giles Sparrow elucidates the scientific ideas inherent in each plate, expertly decoding and analysing the complex information contained in them and placing Doppelmayr's sumptuous Atlas in the context of the ground-breaking discoveries made during the Renaissance and Enlightenment periods. A spectacular, revelatory celestial compendium to the cosmos, Phaenomena expands on and explains Doppelmayr's original, awe-inspiring Atlas and reflects upon its influence on the development of the science of astronomy to the present day.

Through Measurement to Knowledge - The Selected Papers of Heike Kamerlingh Onnes 1853-1926 (Hardcover, 1991 ed.): K. Gavroglu Through Measurement to Knowledge - The Selected Papers of Heike Kamerlingh Onnes 1853-1926 (Hardcover, 1991 ed.)
K. Gavroglu; Heike Kamerlingh Onnes; Edited by Yorgos Goudaroulis
R5,512 Discovery Miles 55 120 Ships in 18 - 22 working days

"Tile; D'apC:Tile; l. DpWTa ()coi 7rpo7rapod)w GBP D'T}K,mi'. "between us and Goodness the gods have placed the sweat of our brows". This quote from Isiodos, the first lyrical poet, is jotted on a sheet of paper found among the papers of Heike Kamerlingh Onnes at the Boerhaave Museum, Leiden. On this same sheet, one can also read quotes from Schiller, Goethe, Shakespeare, Homer, Pindar and Dante. Each quote is for somebody or something. It appears to have been a game played at least by Ehrenfest and Crommelin -an unmistakable sign of these two physicists's deep culture. This particular quote was for the "Werkplaats", the Physical Laboratory of the University of Leiden. Our purpose in putting together the Selected Papers of its first Director, Kamerlingh Onnes (1853-1926), is to try and articulate the dominant trends of a different type of culture at Leiden: its physics culture during the years that established low temperature physics as a distinct branch of physics. Our aims in choosing the particular papers are threefold. First, we wish to present the interconnectedness among the different research programs of Kamerlingh Onnes and to bring out the decisive role of the work initiated by van der Waals in determining the direction of nearly all of these research programs.

Atmosphere and Climate - Studies by Occultation Methods (Hardcover, 2006 ed.): Ulrich Foelsche, Gottfried Kirchengast, Andrea... Atmosphere and Climate - Studies by Occultation Methods (Hardcover, 2006 ed.)
Ulrich Foelsche, Gottfried Kirchengast, Andrea Steiner
R5,197 Discovery Miles 51 970 Ships in 18 - 22 working days

This book presents carefully edited and peer-reviewed papers from the 2nd International Workshop on Occultations for Probing Atmosphere and Climate (OPAC-2), held in Graz, Austria. It starts with a general introductory paper and proceeds to address the full range from methodology in general via specific occultation methods (GNSS-LEO, LEO-LEO, stellar and solar) to the use of occultation data, with focus on atmospheric physics, meteorology and climate.

Exploration and Engineering - The Jet Propulsion Laboratory and the Quest for Mars (Paperback): Erik M. Conway Exploration and Engineering - The Jet Propulsion Laboratory and the Quest for Mars (Paperback)
Erik M. Conway
R1,063 Discovery Miles 10 630 Ships in 18 - 22 working days

Although the Jet Propulsion Laboratory in Pasadena, California, has become synonymous with the United States' planetary exploration during the past half century, its most recent focus has been on Mars. Beginning in the 1990s and continuing through the Mars Phoenix mission of 2007, JPL led the way in engineering an impressive, rapidly evolving succession of Mars orbiters and landers, including roving robotic vehicles whose successful deployment onto the Martian surface posed some of the most complicated technical problems in space flight history. In Exploration and Engineering, Erik M. Conway reveals how JPL engineers' creative technological feats led to major breakthroughs in Mars exploration. He takes readers into the heart of the lab's problem-solving approach and management structure, where talented scientists grappled with technical challenges while also coping, not always successfully, with funding shortfalls, unrealistic schedules, and managerial turmoil. Conway, JPL's historian, offers an insider's perspective into the changing goals of Mars exploration, the ways in which sophisticated computer simulations drove the design process, and the remarkable evolution of landing technologies over a thirty-year period.

Outer Space and Popular Culture - Influences and Interrelations, Part 2 (Hardcover, 1st ed. 2022): Annette Froehlich Outer Space and Popular Culture - Influences and Interrelations, Part 2 (Hardcover, 1st ed. 2022)
Annette Froehlich
R3,314 Discovery Miles 33 140 Ships in 18 - 22 working days

Following on from Part 1, which was highly acclaimed by the space community, this peer-viewed book provides detailed insights into how space and popular culture intersect across a broad spectrum of areas, including cinema, music, art, arcade games, cartoons, comics, and advertisements. This is a pertinent topic since the use of space themes differs in different cultural contexts, and these themes can be used to explore various aspects of the human condition and provide a context for social commentary on politically sensitive issues. With the use of space imagery evolving over the past sixty years of the space age, this topic is ripe for in-depth exploration. Covering a wide array of relevant and timely topics, the book examines the intersections between space and popular culture, and offers accounts of space and its effect on culture, language, and storytelling from the southern regions of the world.

Between Theory and Observations - Tobias Mayer's Explorations of Lunar Motion, 1751-1755 (Hardcover, 2010 ed.): Steven... Between Theory and Observations - Tobias Mayer's Explorations of Lunar Motion, 1751-1755 (Hardcover, 2010 ed.)
Steven Wepster
R2,788 Discovery Miles 27 880 Ships in 18 - 22 working days

In the 18th century, purely scientific interests as well as the practical necessities of navigation motivated the development of new theories and techniques to accurately describe celestial and lunar motion.

"Between Theory and Observations" presents a detailed and accurate account, not to be found elsewhere in the literature, of Tobias Mayer's important contributions to the study of lunar motion including the creation of his famous set of lunar tables, which were the most accurate of their time.

Dear Pluto (Hardcover): Carmen Gloria Dear Pluto (Hardcover)
Carmen Gloria; Illustrated by Carmen Gloria
R592 Discovery Miles 5 920 Ships in 18 - 22 working days
Nulling Interferometers for Space-based High-Contrast Visible Imaging and Measurement of Exoplanetary Environments (Hardcover,... Nulling Interferometers for Space-based High-Contrast Visible Imaging and Measurement of Exoplanetary Environments (Hardcover, 2014 ed.)
Brian Hicks
R3,240 Discovery Miles 32 400 Ships in 18 - 22 working days

High-contrast astronomical imaging has progressed significantly in the past decade. Many of these techniques have been laboratory demonstrated to perform at contrast levels adequate for the detection of Solar System-like planets and dust around nearby stars. None of them, however, have been demonstrated in space. The state of the art in high-contrast imaging systems that have been built for space-based observation, the environment best suited for spectroscopic study of exo-Earths, is the nulling interferometer that was flown on the Planetary Imaging Concept Testbed Using a Rocket Experiment (PICTURE). The PICTURE nulling interferometer, built from multiple optical elements, relies on the incorporation of additional dispersive components in order to deliver the broadband performance preferred for faint object imaging. These elements add to the cost, complexity, and misalignment risk of the instrument.
The Monolithic Achromatic Nulling Interference Coronagraph (MANIC) Brian Hicks describe in this thesis the first optic of its kind. He has taken the multiple optical element concept described in earlier works from theory to a flyable monolithic optic. Brian has advanced the state of the art in nulling interferometers by improving optical stability and robustness. Following application of the fabrication method described in this work, the design of MANIC also allows for broader band performance at higher contrast than that achieved with the PICTURE nulling interferometer.

The Evolving Universe - The Evolving Universe, Relativity, Redshift and Life from Space (Hardcover): G A Mohr, Richard... The Evolving Universe - The Evolving Universe, Relativity, Redshift and Life from Space (Hardcover)
G A Mohr, Richard Sinclair, Edwin Fear
R895 Discovery Miles 8 950 Ships in 10 - 15 working days
Geomorphology of Desert Dunes (Hardcover, 2nd Revised edition): Nicholas Lancaster Geomorphology of Desert Dunes (Hardcover, 2nd Revised edition)
Nicholas Lancaster
R2,098 Discovery Miles 20 980 Ships in 18 - 22 working days

Sand dunes are a globally important depositional landform and sedimentary system. Their origins and dynamics are important in understanding how deserts have evolved in response to climate change and changes in sand supply and mobility, and how they will continue to evolve in the future. This book provides a state-of-the-art review of the characteristics of desert dunes and their sediments, and explores their dynamics on timescales from days to millennia as they respond to changes in wind speed and direction, precipitation and sand supply. This extensively revised edition reflects the advances in our understanding of desert dunes, their dynamics and history; and covers recent developments including the luminescence dating revolution, ground penetrating radar and advances in numerical modeling. Also covering dunes on Mars and Titan, this authoritative reference is a must-have for researchers and graduate students working on desert dunes and aeolian geomorphology.

Space Fostering African Societies - Developing the African Continent Through Space, Part 3 (Hardcover, 1st ed. 2022): Annette... Space Fostering African Societies - Developing the African Continent Through Space, Part 3 (Hardcover, 1st ed. 2022)
Annette Froehlich
R4,221 Discovery Miles 42 210 Ships in 18 - 22 working days

This peer-reviewed book provides detailed insights into how space and its applications are, and can be used to support the development of the full range and diversity of African societies, as encapsulated in the African Union's Agenda 2063. Following on from Part 1 and 2, which were highly acclaimed by the space community, it focuses on the role of space in supporting the UN Sustainable Development Goals in Africa, but covers an even more extensive array of relevant and timely topics addressing all facets of African development. It demonstrates that, while there have been significant achievements in recent years in terms of economic and social development, which have lifted many of Africa's people out of poverty, there is still a great deal that needs to be done to fulfill the basic needs of Africa's citizens and afford them the dignity they deserve. To this end, space is already being employed in diverse fields of human endeavor to serve Africa's goals for its future, but there is much room for further incorporation of space systems and data. Providing a comprehensive overview of the role space is playing in helping Africa achieve its developmental aspirations, the book will appeal to both students and professionals in fields such as space studies, international relations, governance, and social and rural development.

Simulation of Thermoelastic Behaviour of Spacecraft Structures - Fundamentals and Recommendations (Hardcover, 1st ed. 2022):... Simulation of Thermoelastic Behaviour of Spacecraft Structures - Fundamentals and Recommendations (Hardcover, 1st ed. 2022)
Simon Appel, Jaap Wijker
R4,300 Discovery Miles 43 000 Ships in 18 - 22 working days

This book provides recommendations for thermal and structural modelling of spacecraft structures for predicting thermoelastic responses. It touches upon the related aspects of the finite element and thermal lumped parameter method. A mix of theoretical and practical examples supports the modelling guidelines. Starting from the system needs of instruments of spacecraft, the reader is supported with the development of the practical requirements for the joint development of the thermal and structural models. It provides points of attention and suggestions to check the quality of the models.The temperature mapping problem, typical for spacecraft thermoelastic analysis, is addressed. The principles of various temperature mapping methods are presented. The prescribed average temperature method, co-developed by the authors, is discussed in detail together with its spin-off to provide high quality conductors for thermal models. The book concludes with the discussion of the application of uncertainty assessment methods. The thermoelastic analysis chain is computationally expensive. Therefore, the 2k+1 point estimate method of Rosenblueth is presented as an alternative for the Monte Carlo Simuation method, bringing stochastic uncertainty analysis in reach for large thermoelastic problems.

The Human Factor in the Settlement of the Moon - An Interdisciplinary Approach (Hardcover, 1st ed. 2021): Margaret Boone... The Human Factor in the Settlement of the Moon - An Interdisciplinary Approach (Hardcover, 1st ed. 2021)
Margaret Boone Rappaport, Konrad Szocik
R3,677 Discovery Miles 36 770 Ships in 10 - 15 working days

Approaching the settlement of our Moon from a practical perspective, this book is well suited for space program planners. It addresses a variety of human factor topics involved in colonizing Earth's Moon, including: history, philosophy, science, engineering, agriculture, medicine, politics & policy, sociology, and anthropology. Each chapter identifies the complex, interdisciplinary issues of the human factor that arise in the early phases of settlement on the Moon. Besides practical issues, there is some emphasis placed on preserving, protecting, and experiencing the lunar environment across a broad range of occupations, from scientists to soldiers and engineers to construction workers. The book identifies utilitarian and visionary factors that shape human lives on the Moon. It offers recommendations for program planners in the government and commercial sectors and serves as a helpful resource for academic researchers. Together, the coauthors ask and attempt to answer: "How will lunar society be different?"

Kinetic Theory and Transport Phenomena (Hardcover): Rodrigo Soto Kinetic Theory and Transport Phenomena (Hardcover)
Rodrigo Soto
R3,605 Discovery Miles 36 050 Ships in 10 - 15 working days

One of the questions about which humanity has often wondered is the arrow of time. Why does temporal evolution seem irreversible? That is, we often see objects break into pieces, but we never see them reconstitute spontaneously. This observation was first put into scientific terms by the so-called second law of thermodynamics: entropy never decreases. However, this law does not explain the origin of irreversibly; it only quantifies it. Kinetic theory gives a consistent explanation of irreversibility based on a statistical description of the motion of electrons, atoms, and molecules. The concepts of kinetic theory have been applied to innumerable situations including electronics, the production of particles in the early universe, the dynamics of astrophysical plasmas, quantum gases or the motion of small microorganisms in water, with excellent quantitative agreement. This book presents the fundamentals of kinetic theory, considering classical paradigmatic examples as well as modern applications. It covers the most important systems where kinetic theory is applied, explaining their major features. The text is balanced between exploring the fundamental concepts of kinetic theory (irreversibility, transport processes, separation of time scales, conservations, coarse graining, distribution functions, etc.) and the results and predictions of the theory, where the relevant properties of different systems are computed.

Astrophysical Jets - Proceedings of an International Workshop held in Torino, Italy, October 7-9, 1982 (Hardcover, 1983): A.... Astrophysical Jets - Proceedings of an International Workshop held in Torino, Italy, October 7-9, 1982 (Hardcover, 1983)
A. Ferrari, A. Pacholczyk
R5,327 Discovery Miles 53 270 Ships in 18 - 22 working days

Attilio Ferrari I want to recall here the basic points I raised at the beginning of the Workshop as the main targets of discussion (in the name of the Scientific Committee). I attempted to focus the attention of participants on the fact that, in many instances, we tend to discuss jets in terms of simple physics, more or less as one did at the time extragalactic radio sources were discovered: for instance, we still use equipartition arguments. However, we must realize that processes in jets, leading to their morphologies and energetics clearly depend on complex plasma phenomena. Therefore, the same standard arguments used to derive characteristic parameters should be questioned; some of the speakers were invited to attempt a critical analysis of this point, an~ in fact I believe that this "inquisitive attitude" was actually present all along the Workshop. Observers were asked to choose the parameters to be used in a statistical sample of jets. For this they were urged, first of all, to distinguish between primary and secondary features. For instance, are knots and wiggles common to all jets? Are relativistic flow velocities expected in all active nuclei? Are jets denser or lighter than the external medium? On the theoretical side I asked to discuss whether or not existing models are in accordance with the limited statistical sample that we have today. And which should be the lines of development to be pursued first, and to what extent.

Stellar Pulsation - Nonlinear Studies (Hardcover, 2001 ed.): Mine Takeuti, Dimitar D. Sasselov Stellar Pulsation - Nonlinear Studies (Hardcover, 2001 ed.)
Mine Takeuti, Dimitar D. Sasselov
R2,779 Discovery Miles 27 790 Ships in 18 - 22 working days

Stellar pulsations provide a complex system in stars. This complexity is studied by analyzing the non-sinusoidal, semi-regular, or irregular light curves. This unique volume summarizes the application of recent theoretical results obtained from stellar pulsation studies. In addition, the latest developments in hydrodynamic simulations are discussed. A historical sketch of the study of beat Cepheids, first known for their variable amplitudes, is given as an introduction to the book. This introduction clearly demonstrates how complicated the study of variable stars can be, and therefore challenges and invites the reader to study the entire book.

Impacts in Precambrian Shields (Hardcover, 2002 ed.): Juri Plado, Lauri J. Pesonen Impacts in Precambrian Shields (Hardcover, 2002 ed.)
Juri Plado, Lauri J. Pesonen
R4,068 Discovery Miles 40 680 Ships in 18 - 22 working days

This multiauthor book is a compilation of fourteen papers that result from activities within the scientific programme "Response of the Earth System to Impact Processes" (IMPACT) of the European Science Foundation. The program deals with all aspects of meteorite impact research and operates through workshops, exchange programs and short courses. Most of the papers are initiated from the 4th IMPACT workshop "Meteorite Impacts in Precambrian Shields" that took place in Lappajärvi, Finland, in 2000. The volume begins with a detailed view of thirty confirmed meteorite impact structures found in the Fennoscandian Shield and its nearest surroundings. The following papers describe impact structures in different areas.

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