Download or read book Contr le de processus mol culaires par impulsions laser intenses written by Stéphane Guérin and published by . This book was released on 1996 with total page 205 pages. Available in PDF, EPUB and Kindle. Book excerpt: NOUS AVONS ELABORE DES OUTILS THEORIQUES POUR INTERPRETER ET PREDIRE LE CONTROLE DE TRANSFERT DE POPULATION DANS UN SYSTEME QUANTIQUE INTERAGISSANT AVEC UNE RADIATION MULTIMODE INTENSE POUVANT CONTENIR DES MODULATIONS D'AMPLITUDE (MODELISATION D'IMPULSIONS) ET DE FREQUENCE (MODELISATION DU CHIRPING). NOUS AVONS MIS EN EVIDENCE LA PRESENCE THEORIQUE D'UNE FREQUENCE EFFECTIVE GOUVERNANT LA PHYSIQUE DU SYSTEME. LA THEORIE DE FLOQUET, COMBINEE AVEC DES PRINCIPES ADIABATIQUES, EST PRESENTEE AVEC UNE FORMULATION DECOULANT DE LA THEORIE DES ETATS HABILLES DANS UNE CAVITE ET PERMETTANT L'INTERPRETATION DES ECHANGES DE PHOTONS ENTRE LA MATIERE ET UN RAYONNEMENT INTENSE. NOUS AVONS DEVELOPPE DES OUTILS DE SIMULATION NUMERIQUE ADAPTES A L'ETUDE GENERALE DE PROCESSUS D'INTERACTION LASER-MOLECULES. CETTE THEORIE A ETE APPLIQUEE AU CONTROLE DE PROCESSUS MOLECULAIRES. NOUS AVONS TRAITE EN PARTICULIER LE CONTROLE PAR IMPULSION LASER DU TEMPS DE PASSAGE PAR EFFET TUNNEL ET LA DISSOCIATION COMPLETE PAR UNE IMPULSION LASER INFRA-ROUGE, CONTENANT UN BALAYAGE EN FREQUENCE, D'UNE MOLECULE DIATOMIQUE DANS SON ETAT ELECTRONIQUE FONDAMENTAL
Download or read book Some Advancement in Ionization of Atoms and Molecules in Intermediate Intensity Regime Using Ultra fast Laser Pulses written by Seyed Mehdi Sharifi Kalahroudi and published by . This book was released on 2010 with total page 228 pages. Available in PDF, EPUB and Kindle. Book excerpt: Dans cette thèse, nous présentons une étude de l'ionisation multiphotonique ou tunnel de certains atomes et molécules dans un régime intermédiaire d'intensité (~1013-1014 W/cm2) en utilisant des impulsions provenant d'un laser ultra rapide Ti:saphir. En étudiant l'ionisation à deux couleurs de Ar et de Xe, nous présentons un modèle pour quantifier les contributions tunnel quasi-statique et multiphotonique. La dépendance du taux d'ionisation de Ar et de Xe sur l'angle entre les vecteurs de polarisation de deux impulsions ([omega] et 2 [omega] est mesurée. L'ionisation de cinq molécules organiques, C6H6, C5NH5, C3H6, C2H4, et C2H2, est étudiée. Deux phénomènes sont observés. La première observation montre que la probabilité d'ionisation jusqu'à un état uniquement chargé (+1) est supprimée en comparaison avec des atomes fictifs ayant le même potentiel d'ionisation. La seconde montre que l'ionisation double de ces molécules se produit principalement par un processus non séquentiel. Ces molécules présentent une probabilité relative énorme pour l'ionisation non séquentielle, qui est attribuée à la suppression de l'ionisation multiphotonique ou tunnel d'un ion de charge +1. Finalement, pour une application de spectroscopic laser, les spectres de masse de deux isomères de butène, 1-butène et cis-2-butène ionisés par des impulsions laser femtosecondes intenses sont comparés. On montre que la différence entre ces deux spectres est beaucoup plus prononcée que celle qu'on observe sur des spectres obtenus par collisions d'électrons de 100 eV. Notre observation suggère l'application possible de l'ionisation multiphotonique dissociative par des impulsions d'un laser ultrarapide pour la spectroscopic de masse de haute performance pour distinguer des molécules similaires.
Download or read book Journal de physique written by and published by . This book was released on 2005 with total page 424 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Dissertation Abstracts International written by and published by . This book was released on 2006 with total page 848 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book COLOQ 8 written by Alain Aspect and published by . This book was released on 2004 with total page 338 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Methods of Laser Spectroscopy written by Yehiam Prior and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 482 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Fritz Haber Symposium on Methods of Laser Spectroscopy was held in Ein Bokek, Israel, on the shores of the Dead Sea, on December 16-20, 1985. The location is the lowest place on earth, 392 meters below sea level. It was hoped that 120 active laser scientists, so lowly trapped in such a place, with the nearest entertainment 100 km away, will have no choice but to discuss laser spectroscopy. On the average, the Dead Sea area receives 3-4 days of rain each year, and this year these days all occurred during the conference. This did not mean the cancellation of the hikes, although the trip to Massada was conducted in the rain. The unexpected rains also caused flash floods in the area, and Ein Bokek was completely cut-off on Thursday night. The archeologist scheduled to speak after dinner, and the belly dancer scheduled to appear afterwards, (~ould not arrive, resulting in the only serious deviation from the original plan. The scientific program consisted of invited talks and contributed posters. The emphasis in selection of invited speakers and topics was on the methods rather than specific molecular systems, and an attempt was made to allow ample time for discussion after each lecture. The same philosophy guided us in editing this book, and authors were requested to write manuscripts longer than usual for standard conference proceedings.
Download or read book Government Reports Announcements Index written by and published by . This book was released on 1989-02 with total page 1146 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Linking the Gaseous and Condensed Phases of Matter written by Loucas G. Christophorou and published by . This book was released on 1994-08 with total page 614 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book New Directions in Atomic Physics written by C.T. Whelan and published by Springer Science & Business Media. This book was released on 1999-09-30 with total page 392 pages. Available in PDF, EPUB and Kindle. Book excerpt: The last few years have seen some remarkable advances in the understanding of atomic phenomena. It is now possible to isolate atomic systems in traps, measure in coincidence the fragments of collision processes, routinely produce, and study multicharged ions. One can look at bulk matter in such a way that the fundamental atomic character is clearly evident and work has begun to tease out the properties of anti matter. The papers in this book reflect many aspects of modem Atomic Physics. They correspond to the invited talks at a conference dedicated to the study of "New Directions in Atomic Physics," which took place in Magdalene College, Cambridge in July of 1998. The meeting was designed as a way of taking stock of what has been achieved and, it was hoped, as a means of stimulating new research in new areas, along new lines. Consequently, an effort was made to touch on as many directions as we could in the four days of the meeting. We included some talks which overviewed whole subfields, as well as quite a large number of research contributions. There is a unity to Physics and we tried to avoid any artificial division between theory and experiment. We had roughly the same number of talks from those who are primarily concerned with making measurements, and from those who spend their lives trying to develop the theory to describe the experiments.
Download or read book ICREEC 2019 written by Ahmed Belasri and published by Springer Nature. This book was released on 2020-06-10 with total page 659 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book highlights peer reviewed articles from the 1st International Conference on Renewable Energy and Energy Conversion, ICREEC 2019, held at Oran in Algeria. It presents recent advances, brings together researchers and professionals in the area and presents a platform to exchange ideas and establish opportunities for a sustainable future. Topics covered in this proceedings, but not limited to, are photovoltaic systems, bioenergy, laser and plasma technology, fluid and flow for energy, software for energy and impact of energy on the environment.
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 Chemistry in Action Making Molecular Movies with Ultrafast Electron Diffraction and Data Science written by Lai Chung Liu and published by Springer Nature. This book was released on 2020-09-10 with total page 249 pages. Available in PDF, EPUB and Kindle. Book excerpt: The thesis provides the necessary experimental and analytical tools to unambiguously observe the atomically resolved chemical reactions. A great challenge of modern science has been to directly observe atomic motions during structural transitions, and while this was first achieved through a major advance in electron source brightness, the information content was still limited and new methods for image reconstruction using femtosecond electron diffraction methods were needed. One particular challenge lay in reconciling the innumerable possible nuclear configurations with the observation of chemical reaction mechanisms that reproducibly give the same kind of chemistry for large classes of molecules. The author shows that there is a simple solution that occurs during barrier crossing in which the highly anharmonic potential at that point in nuclear rearrangements couples high- and low-frequency vibrational modes to give highly localized nuclear motions, reducing hundreds of potential degrees of freedom to just a few key modes. Specific examples are given in this thesis, including two photoinduced phase transitions in an organic system, a ring closure reaction, and two direct observations of nuclear reorganization driven by spin transitions. The emerging field of structural dynamics promises to change the way we think about the physics of chemistry and this thesis provides tools to make it happen.
Download or read book Simulacra and Simulation written by Jean Baudrillard and published by University of Michigan Press. This book was released on 1994 with total page 174 pages. Available in PDF, EPUB and Kindle. Book excerpt: Develops a theory of contemporary culture that relies on displacing economic notions of cultural production with notions of cultural expenditure. This book represents an effort to rethink cultural theory from the perspective of a concept of cultural materialism, one that radically redefines postmodern formulations of the body.
Download or read book Handbook of Microalgae Based Processes and Products written by Eduardo Jacob-Lopes and published by Academic Press. This book was released on 2020-07-23 with total page 938 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Handbook of Microalgae-based Processes and Products provides a complete overview of all aspects involved in the production and utilization of microalgae resources at commercial scale. Divided into four parts (fundamentals, microalgae-based processes, microalgae-based products, and engineering approaches applied to microalgal processes and products), the book explores the microbiology and metabolic aspects of microalgae, microalgal production systems, wastewater treatment based in microalgae, CO2 capture using microalgae, microalgae harvesting techniques, and extraction and purification of biomolecules from microalgae. It covers the largest number of microalgal products of commercial relevance, including biogas, biodiesel, bioethanol, biohydrogen, single-cell protein, single-cell oil, biofertilizers, pigments, polyunsaturated fatty acids, bioactive proteins, peptides and amino acids, bioactive polysaccharides, sterols, bioplastics, UV-screening compounds, and volatile organic compounds. Moreover, it presents and discusses the available engineering tools applied to microalgae biotechnology, such as process integration, process intensification, and techno-economic analysis applied to microalgal processes and products, microalgal biorefineries, life cycle assessment, and exergy analysis of microalgae-based processes and products. The coverage of a broad range of potential microalgae processes and products in a single volume makes this handbook an indispensable reference for engineering researchers in academia and industry in the fields of bioenergy, sustainable development, and high-value compounds from biomass, as well as graduate students exploring those areas. Engineering professionals in bio-based industries will also find valuable information here when planning or implementing the use of microalgal technologies. - Covers theoretical background information and results of recent research. - Discusses all commercially relevant microalgae-based processes and products. - Explores the main emerging engineering tools applied to microalgae processes, including techno-economic analysis, process integration, process intensification, life cycle assessment, and exergy analyses.
Download or read book Molecules in Laser Fields written by André D. Bandrauk and published by CRC Press. This book was released on 1993-12-14 with total page 480 pages. Available in PDF, EPUB and Kindle. Book excerpt: This text presents the major advances in both intense laser fields phenomena and laser control of photochemical reactions - highlighting experimental and theoretical research on the interaction of simple molecules with intense laser fields. The book introduces new concepts such as above-threshold ionization (ATI), above-threshold dissociation (ATD), laser-induced avoided crossings, and coherent control.
Download or read book Microreaction Technology written by M. Matlosz and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 584 pages. Available in PDF, EPUB and Kindle. Book excerpt: IMRET 5 featured more than 80 oral and poster communications, covering the entire interdisciplinary field from design, production, modeling and characterization of microreactor devices to application of microstructured systems for production, energy and transportation, including many analytical and biological applications. A particularly strong topic was the investigation of the potential of microstructuring of reactors and systems components for process intensification. Perspectives of combining local, in situ, data acquisition with appropriate microstructuring of actuators and components within chemical and biological devices were explored in order to enhance process performance and facilitate process control.
Download or read book The Identification of Molecular Spectra written by Reginald William Blake Pearse and published by . This book was released on 1941 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
