Download or read book Interaction d agr gats de gaz rares avec un champ laser intense written by SANDRINE.. DOBOSZ and published by . This book was released on 1998 with total page 236 pages. Available in PDF, EPUB and Kindle. Book excerpt: LES AGREGATS DE GAZ RARES SONT UNE CIBLE ENCORE PEU ETUDIEE EN CHAMP LASER INTENSE. OR, LEURS PROPRIETES PARTICULIERES EN FONT UNE CIBLE TRES INTERESSANTE. ALORS QU'IL S'AGIT D'UNE CIBLE EN PHASE GAZEUSE, LA DENSITE LOCALE AU SEIN DES AGREGATS EST TRES ELEVEE, PROCHE DE CELLE D'UN SOLIDE. L'IRRADIATION INTENSE DES AGREGATS PRODUIT UN PLASMA AU SEIN DUQUEL DES PHENOMENES D'ECHAUFFEMENT COLLISIONNEL SE DEVELOPPENT. CECI EXPLIQUE, NOTAMMENT, LES ETATS D'IONISATION ELEVES DES FRAGMENTS ET LA GENERATION DE RAYONNEMENT X DANS LA GAMME D'ENERGIE DU KEV. L'ENSEMBLE DES RESULTATS EXPERIMENTAUX MONTRE QUE LES ATOMES DANS LES AGREGATS SONT D'ABORD IONISES PAR EFFET TUNNEL SUIVIS PAR UNE IONISATION PAR IMPACT ELECTRONIQUE. PAR EXEMPLE, POUR DES AGREGATS DE XENON, NOUS AVONS DETECTE DES IONS XE#Q#+ JUSQUE 30 FOIS CHARGES. LES ELECTRONS LES PLUS ENERGETIQUES QUITTENT L'AGREGAT, CREANT AINSI UN DEFAUT DE CHARGE EN SURFACE. LE PLASMA SE DETEND ALORS SOUS L'ACTION CONJUGUEE DE LA PRESSION COULOMBIENNE ET DE LA PRESSION CINETIQUE. L'IMPORTANCE DE L'UNE PAR RAPPORT A L'AUTRE DEPEND DE LA TAILLE DE L'AGREGAT, LES PLUS PETITS SE DILATANT PRINCIPALEMENT SOUS L'ACTION DES FORCES ELECTROSTATIQUES. CE SCENARIO PERMET D'EXPLIQUER LA PRESENCE DE FRAGMENTS AVEC DES ENERGIES ALLANT JUSQU'AU MEV. NOUS AVONS EGALEMENT REALISE UNE ETUDE DE SPECTROSCOPIE X A HAUTE RESOLUTION AFIN D'EXPLORER IN SITU LES PROPRIETES DU PLASMA. CETTE ETUDE SOULIGNE LE ROLE ESSENTIEL DES COLLISIONS ENTRE LES ELECTRONS ET LES IONS, A L'ORIGINE DE LA GENERATION DE RAYONNEMENT X DANS LA GAMME D'ENERGIE DU KEV. NOS OBSERVATIONS ONT ETE ETAYES PAR UN MODELE D'EXPANSION DU PLASMA GENERE A PARTIR D'UN AGREGAT.
Download or read book Turbulence written by Uriel Frisch and published by Cambridge University Press. This book was released on 1995-11-30 with total page 318 pages. Available in PDF, EPUB and Kindle. Book excerpt: This textbook presents a modern account of turbulence, one of the greatest challenges in physics. The state-of-the-art is put into historical perspective five centuries after the first studies of Leonardo and half a century after the first attempt by A. N. Kolmogorov to predict the properties of flow at very high Reynolds numbers. Such 'fully developed turbulence' is ubiquitous in both cosmical and natural environments, in engineering applications and in everyday life. The intended readership for the book ranges from first-year graduate students in mathematics, physics, astrophysics, geosciences and engineering, to professional scientists and engineers. Elementary presentations of dynamical systems ideas, of probabilistic methods (including the theory of large deviations) and of fractal geometry make this a self-contained textbook.
Download or read book Compilation of Minimum and Maximum Isotope Ratios of Selected Elements in Naturally Occurring Terrestrial Materials and Reagents written by Tyler B. Coplen and published by . This book was released on 2002 with total page 112 pages. Available in PDF, EPUB and Kindle. Book excerpt: Documented variations in the isotopic compositions of some chemical elements are responsible for expanded uncertainties in the standard atomic weights published by the Commission on Atomic Weights and Isotopic Abundances of the International Union of Pure and Applied Chemistry. This report summarizes reported variations in the isotopic compositions of 20 elements that are due to physical and chemical fractionation processes (not due to radioactive decay) and their effects on the standard atomic weight uncertainties. For 11 of those elements (hydrogen, lithium, boron, carbon, nitrogen, oxygen, silicon, sulfur, chlorine, copper, and selenium), standard atomic weight uncertainties have been assigned values that are substantially larger than analytical uncertainties because of common isotope abundance variations in materials of natural terrestrial origin. For 2 elements (chromium and thallium), recently reported isotope abundance variations potentially are large enough to result in future expansion of their atomic weight uncertainties. For 7 elements (magnesium, calcium, iron, zinc, molybdenum, palladium, and tellurium), documented isotope-abundance variations in materials of natural terrestrial origin are too small to have a significant effect on their standard atomic weight uncertainties.
Download or read book Quadrupole Ion Trap Mass Spectrometry written by Raymond E. March and published by Wiley-Interscience. This book was released on 2005-09-12 with total page 416 pages. Available in PDF, EPUB and Kindle. Book excerpt: A definitive reference, completely updated Published in 1989, the First Edition of this book, originally entitled Quadrupole Storage Mass Spectrometry, quickly became the definitive reference in analytical laboratories worldwide. Revised to reflect scientific and technological advances and new applications in the field, the Second Edition includes new chapters covering: * New ion trap instruments of high sensitivity * Peptide analysis by liquid chromatography/ion trap tandem mass spectrometry * Analytical aspects of ion trap mass spectrometry combined with gas chromatography * Simulation of ion trajectories in the ion trap One additional chapter discusses the Rosetta mission, a "comet chaser" that was sent on a ten-year journey in 2004 to study the comet Churyumov-Gerasimenko using, among other instruments, a GC/MS system incorporating a specially designed ion trap mass spectrometer. This comprehensive reference also includes discussions of the history of the quadrupole ion trap, the theory of quadrupole mass spectrometry, the dynamics of ion-trapping chemistry in the quadrupole ion trap, the cylindrical ion trap, miniature traps, and linear ion traps. Complete with conclusions and references, this primer effectively encapsulates the body of knowledge on quadrupole ion trap mass spectrometry. With its concise descriptions of the theory of ion motion and the principles of operation, Quadrupole Ion Trap Mass Spectrometry, Second Edition is ideal for new users of quadrupole devices, as well as for scientists, researchers, and graduate and post-doctoral students working in analytical laboratories.
Download or read book Dictionary of Abbreviations in Medical Sciences written by Rolf Heister and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 451 pages. Available in PDF, EPUB and Kindle. Book excerpt: Not everyone is a friend of the manifold abbreviations that have by now beCome a part of the scientific language of medicine. In order to avoid misunderstanding these abbreviations, it is wise to refer to a reliable dic tionary, such as this one prepared by Heister. The abbreviation ED means, for instance, effective dose to the pharmacologist. However, it might also stand for emetic dose. Radiologists use the same abbreviation for erythema dose, and ED could also mean ethyl dichlorarsine. A com mon meaning of ECU is European currency unit, a meaning that might not be very often in scientific medical publications. ECU, however, also means environmental control unit or European Chiropractic Union. Hopefully, those making inventions and discoveries will make use of Heister's dictionary before creating new abbreviations when preparing manuscripts for scientific publications. It is a very worthwhile goal not to use the same abbreviation for several different terms, especially if it is already widely accepted to mean only one of them. It may be impossible, however, to achieve this goal in different scientific disciplines. Therefore, although it is wise for the abbreviations used in a publication to be defined, it is also very helpful for readers and writers to use a dictionary such as this one. The author deserves our warmest thanks since we know that compiling such a comprehensive dictionary is based upon incredibly hard effort.
Download or read book A Manual of Pahlavi written by Henrik Samuel Nyberg and published by Otto Harrassowitz Verlag. This book was released on 1964 with total page 244 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Critical Technologies Plan written by and published by . This book was released on 1989 with total page 160 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Ancient Egypt Transformed written by Adela Oppenheim and published by Metropolitan Museum of Art. This book was released on 2015-10-12 with total page 404 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Middle Kingdom (ca. 2030–1650 B.C.) was a transformational period in ancient Egypt, during which older artistic conventions, cultural principles, religious beliefs, and political systems were revived and reimagined. Ancient Egypt Transformed presents a comprehensive picture of the art of the Middle Kingdom, arguably the least known of Egypt’s three kingdoms and yet one that saw the creation of powerful, compelling works rendered with great subtlety and sensitivity. The book brings together nearly 300 diverse works— including sculpture, relief decoration, stelae, jewelry, coffins, funerary objects, and personal possessions from the world’s leading collections of Egyptian art. Essays on architecture, statuary, tomb and temple relief decoration, and stele explore how Middle Kingdom artists adapted forms and iconography of the Old Kingdom, using existing conventions to create strikingly original works. Twelve lavishly illustrated chapters, each with a scholarly essay and entries on related objects, begin with discussions of the distinctive art that arose in the south during the early Middle Kingdom, the artistic developments that followed the return to Egypt’s traditional capital in the north, and the renewed construction of pyramid complexes. Thematic chapters devoted to the pharaoh, royal women, the court, and the vital role of family explore art created for different strata of Egyptian society, while others provide insight into Egypt’s expanding relations with foreign lands and the themes of Middle Kingdom literature. The era’s religious beliefs and practices, such as the pilgrimage to Abydos, are revealed through magnificent objects created for tombs, chapels, and temples. Finally, the book discusses Middle Kingdom archaeological sites, including excavations undertaken by the Metropolitan Museum over a number of decades. Written by an international team of respected Egyptologists and Middle Kingdom specialists, the text provides recent scholarship and fresh insights, making the book an authoritative resource.
Download or read book Transplant Production Systems written by K. Kurata and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 340 pages. Available in PDF, EPUB and Kindle. Book excerpt: As biotechnology produces an unprecedented number of new plantvarieties, automated transplant production systems offer the means for their large-scale introduction via a rapid, efficient and economic method. As labour costs increase, so will automated systems assume even greater importance. Reforestation and afforestation projects, anti-des-ertification plantings and an increasing demand for urban greenery also create enormous demands for the mass production of high quality transplants, in addition to the commercial needs of the agriculture industry. The application of engineering techniques to modern micropropagation techniques and plant production means that many tasks can be automated, especially physical manipulation and close control of the microenvironment. This volume provides overviews of the main con-cepts -- plug seedling production, micropropagation, robotization, model development, measurement and environmental control -- with an emphasis on practical considerations. Examples are drawn from flower, vegetable and forest tree species to show how disciplines such as robotics and image analysis have a part to play in plant production.
Download or read book The Bacterial Chromosome written by N. Patrick Higgins and published by Amer Society for Microbiology. This book was released on 2005 with total page 559 pages. Available in PDF, EPUB and Kindle. Book excerpt: An examination of the mechanisms governing genetic inheritance. - Provides a link between classical experiments in chromosome physiology and new developments in genetic research. - Covers the fundamental systems required for all bacterial cells to replicate chromosomes and organize genetic information. - Presents complex biochemical reactions, including DNA replication, genetic recombination, and RNA transcription, from both genetic and physical perspectives. - Incorporates the implications of the DNA sequence database with information on horizontal gene transfer and the impact of phage genes on bacterial genomes.
Download or read book Accelerated Plant Breeding Volume 3 written by Satbir Singh Gosal and published by Springer. This book was released on 2020-11-06 with total page 430 pages. Available in PDF, EPUB and Kindle. Book excerpt: Plant improvement has shifted its focus from yield, quality and disease resistance to factors that will enhance commerical export, such as early maturity, shelf life and better processing quality. Conventional plant breeding methods aiming at the improvement of a self-pollinating crop, such as wheat, usually take 10-12 years to develop and release of the new variety. During the past 10 years, significant advances have been made and accelerated methods have been developed for precision breeding and early release of crop varieties. The proposed volume work thus plans to summarize concepts dealing with germplasm enhancement and development of improved varieties based on innovative methodologies that include doubled haploidy, marker assisted selection, marker assisted background selection, genetic mapping, genomic selection, high-throughput genotyping, high-throughput phenotyping, mutation breeding, reverse breeding, transgenic breeding, shuttle breeding, speed breeding, low cost high-throughput field phenotyping, etc. It will be an important reference with special focus on accelerated development of improved crop varieties.
Download or read book Reactor Materials written by and published by . This book was released on 1968 with total page 316 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Scars Marks Tattoos written by Jacqueline Caruso and published by . This book was released on 2021-03-31 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: I have physical scars from past surgeries, however, I have emotional scars as well. They were buried deep inside (hidden). It wasn't until my mother died was I able to "catch my breath" and to make sense of or process the emotional pain I had endured due to her prescription drug addiction, resulting in my own addictions.
Download or read book A CONF 15 P written by and published by . This book was released on 1958 with total page 12 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Developing Minds written by Arthur L. Costa and published by Association for Supervision & Curriculum Development. This book was released on 2001 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: What does research tell us about the effects of school leadership on student achievement? What specific leadership practices make a real difference in school effectiveness? How should school leaders use these practices in their day-to-day management of schools and during the stressful times that accompany major change initiatives? Robert J. Marzano, Timothy Waters, and Brian A. McNulty provide answers to these and other questions in School Leadership That Works. Based on their analysis of 69 studies conducted since 1970 that met their selection criteria and a recent survey of more than 650 building principals, the authors have developed a list of 21 leadership responsibilities that have a significant effect on student achievement. Readers will learn the specific behaviors associated with the 21 leadership responsibilities; the difference between first-order change and second-order change and the leadership responsibilities that are most important for each; how to work smart by choosing the right work to focus on to improve student achievement; the advantages and disadvantages of comprehensive school reform models for improving student achievement; how to develop a site-specific approach to improving student achievement, using a framework of 11 factors and 39 action steps; and a five-step plan for effective school leadership. Combining rigorous research with practical advice, School Leadership That Works gives school administrators the guidance they need to provide strong leadership for better schools.
Download or read book Proceedings of the First International Congress of Radiation Protection written by and published by . This book was released on 1968 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
