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Author: Ingrid Mann
Publisher: Springer Science & Business Media
ISBN: 3642275435
Category : Science
Languages : en
Pages : 229
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Book Description
Nanodust and nanometer-sized structures are important components of many objects in space. Nanodust is observed in evolved stars, young stellar objects, protoplanetary disks, and dust debris disks. Within the solar system, nanodust is observed with in-situ experiments from spacecraft. Nanometer-sized substructures are found in the collected cometary and interplanetary dust particles and in meteorites. Understanding the growth and destruction of dust, its internal evolution, as well as the optical properties and the detection of nanoparticles is of fundamental importance for astrophysical research. This book provides a focused description of the current state of research and experimental results concerning nanodust in the solar system. It addresses three major questions: What is nanodust? How was it discovered in the solar system? And how do we interpret the observations? The book serves as a self-contained reference work for space researchers and provides solid information on nanodust in cosmic environments for researchers working in astrophysics or in other fields of physics.
Author: Ingrid Mann
Publisher: Springer Science & Business Media
ISBN: 3642275435
Category : Science
Languages : en
Pages : 229
Get Book Here
Book Description
Nanodust and nanometer-sized structures are important components of many objects in space. Nanodust is observed in evolved stars, young stellar objects, protoplanetary disks, and dust debris disks. Within the solar system, nanodust is observed with in-situ experiments from spacecraft. Nanometer-sized substructures are found in the collected cometary and interplanetary dust particles and in meteorites. Understanding the growth and destruction of dust, its internal evolution, as well as the optical properties and the detection of nanoparticles is of fundamental importance for astrophysical research. This book provides a focused description of the current state of research and experimental results concerning nanodust in the solar system. It addresses three major questions: What is nanodust? How was it discovered in the solar system? And how do we interpret the observations? The book serves as a self-contained reference work for space researchers and provides solid information on nanodust in cosmic environments for researchers working in astrophysics or in other fields of physics.
Author: Nicholas R. Lewkow
Publisher: Springer
ISBN: 3319250795
Category : Science
Languages : en
Pages : 115
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Book Description
This thesis considers the non-equilibrium and energy transfer processes involved in the evolution of astrophysical gases and plasmas. Momentum-energy transfer in collisions of atoms, molecules and ions governs the evolution of interacting astrophysical gas and plasmas. These collisions require an accurate quantum mechanical description and the work presented here develops a unified kinetic and quantum-mechanical model for this consideration. The multi-scale computational approach implemented here takes into account non-thermal distributions of atomic particles and clarifies their role in the evolution of interstellar gas and planetary atmospheres. As shown, the physical parameters of non-thermal distributions strongly depend on the differential cross sections of atomic, molecular and ion collisions. Readers will find a detailed description of the energy relaxation of energetic atoms, produced in the interstellar gas by the solar and stellar wind plasmas. Computation of the non-thermal diffuse background of energetic helium atoms in the heliosphere is also included for evaluation of the contributions from local and cosmic sources and analysis of related satellite observations. Work involving modeling of energetic particle precipitation into planetary atmospheres and formation of the planetary and exoplanetary escape fluxes has been performed with very accurate cross sections, describing momentum-energy transfer processes with high precision. Results of the Monte Carlo simulations, carried out for the Mars atmosphere at different solar conditions, can be used for analysis of observational data for Mars atmospheric escape and investigation into the history of Martian water.
Author: Alexander E.S. Van Driessche
Publisher: Springer
ISBN: 3319456695
Category : Science
Languages : en
Pages : 380
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Book Description
In the last decade, numerous studies have demonstrated the existence of alternative pathways to nucleation and crystallisation that oppose the classical view. Such proposed scenarios include multistage reactions proceeding via various precursor species and/or intermediate phases. The aim of this book is to review and discuss these recent advances in our understanding of the early stages of mineralisation through a series of contributions that address both experimental and theoretical studies about the formation and nature of initial precursor species (e.g., prenucleation clusters, dense liquid phases, amorphous nanoparticles, etc.) as well as their transformations leading to the stable mineral phase. Several chapters are devoted to cutting-edge analytical techniques used for investigating the above processes in situ, in real time and at conditions relevant to both natural and industrial processes. At the end of the book, the editors summarize the key questions that still need to be addressed in order to establish a complete picture of the nucleation and growth processes involved during the formation of minerals
Author: Matthew S. Tiscareno
Publisher: Cambridge University Press
ISBN: 1108547184
Category : Science
Languages : en
Pages : 609
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Book Description
Planetary rings are among the most intriguing structures of our solar system and have fascinated generations of astronomers. Collating emerging knowledge in the field, this volume reviews our current understanding of ring systems with reference to the rings of Saturn, Uranus, Neptune, and more. Written by leading experts, the history of ring research and the basics of ring–particle orbits is followed by a review of the known planetary ring systems. All aspects of ring system science are described in detail, including specific dynamical processes, types of structures, thermal properties and their origins, and investigations using computer simulations and laboratory experiments. The concluding chapters discuss the prospects of future missions to planetary rings, the ways in which ring science informs and is informed by the study of other astrophysical disks, and a perspective on the field's future. Researchers of all levels will benefit from this thorough and engaging presentation.
Author: Peter Rudolph
Publisher: Elsevier
ISBN: 0444633065
Category : Science
Languages : en
Pages : 1420
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Book Description
Vol 2A: Basic TechnologiesHandbook of Crystal Growth, Second Edition Volume IIA (Basic Technologies) presents basic growth technologies and modern crystal cutting methods. Particularly, the methodical fundamentals and development of technology in the field of bulk crystallization on both industrial and research scales are explored. After an introductory chapter on the formation of minerals, ruling historically the basic crystal formation parameters, advanced basic technologies from melt, solution, and vapour being applied for research and production of the today most important materials, like silicon, semiconductor compounds and oxides are presented in detail. The interdisciplinary and general importance of crystal growth for human live are illustrated.Vol 2B: Growth Mechanisms and DynamicsHandbook of Crystal Growth, Second Edition Volume IIB (Growth Mechanisms and Dynamics) deals with characteristic mechanisms and dynamics accompanying each bulk crystal growth method discussed in Volume IIA. Before the atoms or molecules pass over from a position in the fluid medium (gas, melt or solution) to their place in the crystalline face they must be transported in the fluid over macroscopic distances by diffusion, buoyancy-driven convection, surface-tension-driven convection, and forced convection (rotation, acceleration, vibration, magnetic mixing). Further, the heat of fusion and the part carried by the species on their way to the crystal by conductive and convective transport must be dissipated in the solid phase by well-organized thermal conduction and radiation to maintain a stable propagating interface. Additionally, segregation and capillary phenomena play a decisional role for chemical composition and crystal shaping, respectively. Today, the increase of high-quality crystal yield, its size enlargement and reproducibility are imperative conditions to match the strong economy.Volume 2A - Presents the status and future of Czochralski and float zone growth of dislocation-free silicon - Examines directional solidification of silicon ingots for photovoltaics, vertical gradient freeze of GaAs, CdTe for HF electronics and IR imaging as well as antiferromagnetic compounds and super alloys for turbine blades - Focuses on growth of dielectric and conducting oxide crystals for lasers and non-linear optics - Topics on hydrothermal, flux and vapour phase growth of III-nitrides, silicon carbide and diamond are explored Volume 2B - Explores capillarity control of the crystal shape at the growth from the melt - Highlights modeling of heat and mass transport dynamics - Discusses control of convective melt processes by magnetic fields and vibration measures - Includes imperative information on the segregation phenomenon and validation of compositional homogeneity - Examines crystal defect generation mechanisms and their controllability - Illustrates proper automation modes for ensuring constant crystal growth process - Exhibits fundamentals of solution growth, gel growth of protein crystals, growth of superconductor materials and mass crystallization for food and pharmaceutical industries
Author: Paul M. Schenk
Publisher: University of Arizona Press
ISBN: 0816537070
Category : Science
Languages : en
Pages : 535
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Book Description
With active geysers coating its surface with dazzlingly bright ice crystals, Saturn’s large moon Enceladus is one of the most enigmatic worlds in our solar system. Underlying this activity are numerous further discoveries by the Cassini spacecraft, tantalizing us with evidence that Enceladus harbors a subsurface ocean of liquid water. Enceladus is thus newly realized as a forefront candidate among potentially habitable ocean worlds in our own solar system, although it is only one of a family of icy moons orbiting the giant ringed planet, each with its own story. As a new volume in the Space Science Series, Enceladus and the Icy Moons of Saturn brings together nearly eighty of the world’s top experts writing more than twenty chapters to set the foundation for what we currently understand, while building the framework for the highest-priority questions to be addressed through ongoing spacecraft exploration. Topics include the physics and processes driving the geologic and geophysical phenomena of icy worlds, including, but not limited to, ring-moon interactions, interior melting due to tidal heating, ejection and reaccretion of vapor and particulates, ice tectonics, and cryovolcanism. By contextualizing each topic within the profusion of puzzles beckoning from among Saturn’s many dozen moons, Enceladus and the Icy Moons of Saturn synthesizes planetary processes on a broad scale to inform and propel both seasoned researchers and students toward achieving new advances in the coming decade and beyond.
Author: Klaus D. Sattler
Publisher: CRC Press
ISBN: 1420075454
Category : Science
Languages : en
Pages : 718
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Book Description
In the 1990s, nanoparticles and quantum dots began to be used in optical, electronic, and biological applications. Now they are being studied for use in solid-state quantum computation, tumor imaging, and photovoltaics. Handbook of Nanophysics: Nanoparticles and Quantum Dots focuses on the fundamental physics of these nanoscale materials and struct
Author: United States. Congress. House. Committee on Appropriations. Subcommittee on Commerce, Justice, Science, and Related Agencies
Publisher:
ISBN:
Category : Administrative agencies
Languages : en
Pages : 1170
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Book Description
Author: Nabil DOU
Publisher: Lulu.com
ISBN: 1304276740
Category : Fiction
Languages : en
Pages : 224
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Book Description
All the worlds of the Never Ending Tails spread from the same seed: The world before the universe. it is the source of the first three fundamental elements: Void, Silence and Chaos, and later home to their counterparts: Light, Time and Order. It is believed to be home to the first Gods. Eons later, Earth is destroyed and rebooted to be the world of the second immortals; it is in this world where the Moon and the Sun fought before reaching the Eclipse. Parallel to those realities many spread as well. The first one being the Angels' Kingdom. This plane is linked to another Earth on another layer of reality in which the Maidens of Water and Fire live. Parallel to the universe of the time watch, is the Arasmas. Finally two other timelines spread parallel to the one of the second immortals; the one of the Prison planet Doulos and Earth Gamma Minus where the Deus Ex Machina rose swallowing the very fabric of reality on its path.
Author: Jeff Goodell
Publisher: HMH
ISBN: 0547487134
Category : Technology & Engineering
Languages : en
Pages : 273
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Book Description
“Thoughtful, informative, and darkly entertaining. It’s the best treatment of this important (and scary) topic you can find.” —Elizabeth Kolbert Right now, a group of scientists is working on ways to minimize the catastrophic impact of global warming. But they’re not designing hybrids or fuel cells or wind turbines. They’re trying to lower the temperature of the entire planet. And they’re doing it with huge contraptions that suck CO2 from the air, machines that brighten clouds and deflect sunlight away from the earth, even artificial volcanoes that spray heat-reflecting particles into the atmosphere. This is the radical and controversial world of geoengineering, which only five years ago was considered to be “fringe.” But as Jeff Goodell points out, the economic crisis, combined with global political realities, is making these ideas look sane, even inspired. Goodell himself started out as a skeptic, concerned about tinkering with the planet’s thermostat. We can’t even predict next week’s weather, so how are we going to change the temperature of whole regions? What if a wealthy entrepreneur shoots particles into the stratosphere on his own? Who gets blamed if something goes terribly wrong? And perhaps most disturbing, what about wars waged with climate control as the primary weapon? There are certainly risks, but Goodell believes the alternatives could be worse. In the end, he persuades us that geoengineering may just be our last best hope—a Plan B for the environment. His compelling tale of scientific hubris and technical daring is sure to jump-start the next big debate about the future of life on earth. “Goodell explores with infectious curiosity and thoughtful narration this strange, promising, and untested suite of climate fixes.” —BusinessWeek “A quick, enjoyable read through a complex, timely topic. And after you read it, you’ll never look at the sky or the ocean—or Earth, really—in quite the same way again.” —The Christian Science Monitor
