Download or read book Contribution l tude th orique de la structure lectronique du fer cobalt et nickel dans les semiconducteurs II VI written by Wafaa Khattou and published by . This book was released on 1996 with total page 188 pages. Available in PDF, EPUB and Kindle. Book excerpt: L'OBJET DE CE TRAVAIL EST L'ETUDE THEORIQUE DE LA STRUCTURE ELECTRONIQUE DU FER, COBALT ET NICKEL DANS LES SEMI-CONDUCTEURS II-VI. DANS UN PREMIER TEMPS NOUS AVONS PRESENTE LES MODELES CLASSIQUES BASES SUR L'APPROXIMATION MOLECULAIRE TELS QUE LA THEORIE DU CHAMP CRISTALLIN ET LA THEORIE DU CHAMP DU LIGAND. CES MODELES BIEN QU'ILS ARRIVENT A OBTENIR DES RESULTATS SATISFAISANTS QUANT AUX EXPERIENCES D'ABSORPTION, SONT INCAPABLES DE DECRIRE DANS LEUR ENSEMBLE LES SPECTRES DE PHOTOEMISSION. DANS UN DEUXIEME TEMPS NOUS AVONS EXPLICITE LE MODELE SUR LEQUEL NOUS AVONS BASE NOTRE ETUDE: LE MODELE D'INTERACTION DE CONFIGURATIONS. CE MODELE EST UTILISE EN LIAISON AVEC LE HAMILTONIEN D'IMPURETE D'ANDERSSON. IL TIENT COMPTE DES ETATS EXCITES EN SUPERPOSANT A LA CONFIGURATION DE BASE COMPLETEMENT IONIQUE CELLE DES ETATS DIT DE TRANSFERT DE CHARGE OBTENUS PAR TRANSFERT D'ELECTRONS DES LIGANDS VERS LE METAL DE TRANSITION. DANS NOTRE ETUDE NOUS MODELISONS LE CRISTAL PAR UN CLUSTER CONSTITUE DU METAL DE TRANSITION ENTOURE DE CES QUATRE PREMIERS VOISINS (COORDINATION TETRAEDRIQUE). LES PARAMETRES AJUSTABLES DU MODELE SONT: L'ENERGIE DE TRANSFERT DE CHARGE, LES INTEGRALS DE TRANSFERT, LE PARAMETRE DU CHAMP CRISTALLIN ET L'ENERGIE DE MOTT-HUBBARD. CES PARAMETRES SONT OBTENUS PAR COMPARAISON DES SPECTRES D'ABSORPTION ET PHOTOEMISSION THEORIQUES ET EXPERIMENTAUX. ET ENFIN, NOUS AVONS ETUDIE L'EVOLUTION DES PARAMETRES DU MODELE AVEC LA NATURE DU COMPOSE AINSI QUE LA DETERMINATION DES CONSTANTES D'ECHANGE
Download or read book Contribution l tude th orique de la structure lectronique de quelques semi conducteurs organiques lin aires antiferromagn tiques written by Michel Dugay and published by . This book was released on 1974 with total page 146 pages. Available in PDF, EPUB and Kindle. Book excerpt: FONCTIONS D'ONDE. PROPRIETES MAGNETIQUES: ENERGIE DE RENVERSEMENT D'UN SPIN. PROPRIETES ELECTRIQUES; LARGEUR DE BANDE INTERDITE; STRUCTURE DE BANDE, CONDUCTIVITE ELECTRIQUE. EFFETS ANISOTROPES; FORME DES SIGNAUX DE RPE; EVOLUTION VERS L'ETAT METALLIQUE
Download or read book Contribution l tude th orique de la structure lectronique des tats D dans les semiconducteurs semimagn tiques base de mangan se written by Moncef Boukadoum and published by . This book was released on 1996 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
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 Artificial Intelligence in Society written by OECD and published by OECD Publishing. This book was released on 2019-06-11 with total page 152 pages. Available in PDF, EPUB and Kindle. Book excerpt: The artificial intelligence (AI) landscape has evolved significantly from 1950 when Alan Turing first posed the question of whether machines can think. Today, AI is transforming societies and economies. It promises to generate productivity gains, improve well-being and help address global challenges, such as climate change, resource scarcity and health crises.
Download or read book N Heterocyclic Carbenes written by Silvia Diez-Gonzalez and published by Royal Society of Chemistry. This book was released on 2016-11-04 with total page 637 pages. Available in PDF, EPUB and Kindle. Book excerpt: In less than 20 years N-heterocyclic carbenes (NHCs) have become well-established ancillary ligands for the preparation of transition metal-based catalysts. This is mainly due to the fact that NHCs tend to bind strongly to metal centres, avoiding the need of excess ligand in catalytic reactions. Also, NHC‒metal complexes are often insensitive to air and moisture, and have proven remarkably resistant to oxidation. This book showcases the wide variety of applications of NHCs in different chemistry fields beyond being simple phosphine mimics. This second edition has been updated throughout, and now includes a new chapter on NHC‒main group element complexes. It covers the synthesis of NHC ligands and their corresponding metal complexes, as well as their bonding and stereoelectronic properties and applications in catalysis. This is complemented by related topics such as organocatalysis and biologically active complexes. Written for organic and inorganic chemists, this book is ideal for postgraduates, researchers and industrialists.
Download or read book Phosphorus Compounds written by Maurizio Peruzzini and published by Springer Science & Business Media. This book was released on 2011-06-10 with total page 477 pages. Available in PDF, EPUB and Kindle. Book excerpt: Each chapter of Phosphorus Compounds: Advanced Tools in Catalysis and Material Sciences have been carefully selected by the editors in order to represent a state-of-the-art overview of how phosphorus chemistry can provide solutions in various fields of applications. The editors have assembled an international array of world-renowned scientists and each chapter is written by experts in the fields of synthetic chemistry, homogeneous catalysis, dendrimers, theoretical calculations, materials science, and medicinal chemistry with a special focus on the chemistry of phosphorus compounds. Phosphorus Compounds: Advanced Tools in Catalysis and Material Sciences is of interest to a general readership ranging from advanced university course students to experts in academia and industry.
Download or read book Government at a Glance Southeast Asia 2019 written by OECD and published by OECD Publishing. This book was released on 2019-09-10 with total page 132 pages. Available in PDF, EPUB and Kindle. Book excerpt: Government at a Glance Southeast Asia 2019 is the first edition in the Government at a Glance series for the region. It provides the latest available data on public administrations in the 10 ASEAN member countries: Brunei Darussalam, Cambodia, Indonesia, Lao People’s Democratic Republic, Malaysia, Myanmar, the Philippines, Singapore, Thailand and Viet Nam.
Download or read book Flexoelectricity in Liquid Crystals written by Agnes Buka and published by World Scientific. This book was released on 2013 with total page 299 pages. Available in PDF, EPUB and Kindle. Book excerpt: The book intends to give a state-of-the-art overview of flexoelectricity, a linear physical coupling between mechanical (orientational) deformations and electric polarization, which is specific to systems with orientational order, such as liquid crystals. Chapters written by experts in the field shed light on theoretical as well as experimental aspects of research carried out since the discovery of flexoelectricity. Besides a common macroscopic (continuum) description the microscopic theory of flexoelectricity is also addressed. Electro-optic effects due to or modified by flexoelectricity as well as various (direct and indirect) measurement methods are discussed. Special emphasis is given to the role of flexoelectricity in pattern-forming instabilities. While the main focus of the book lies in flexoelectricity in nematic liquid crystals, peculiarities of other mesophases (bent-core systems, cholesterics, and smectics) are also reviewed. Flexoelectricity has relevance to biological (living) systems and can also offer possibilities for technical applications. The basics of these two interdisciplinary fields are also summarized.
Download or read book OECD Investment Policy Reviews Uruguay written by OECD and published by OECD Publishing. This book was released on 2021-07-12 with total page 226 pages. Available in PDF, EPUB and Kindle. Book excerpt: In July 2020, the Investment Committee recommended to Council to invite Uruguay to become the 50th adherent to the OECD Declaration on International Investment and Multinational Enterprises. This OECD Investment Policy Review of Uruguay documents the progress made in recent years to align investment policies with the national development strategy in pursuit of the Sustainable Development Goals (SDGs).
Download or read book Radioisotope Instruments written by J. F. Cameron and published by Elsevier. This book was released on 2013-10-22 with total page 321 pages. Available in PDF, EPUB and Kindle. Book excerpt: International Series of Monographs in Nuclear Energy, Volume 107: Radioisotope Instruments, Part 1 focuses on the design and applications of instruments based on the radiation released by radioactive substances. The book first offers information on the physical basis of radioisotope instruments; technical and economic advantages of radioisotope instruments; and radiation hazard. The manuscript then discusses commercial radioisotope instruments, including radiation sources and detectors, computing and control units, and measuring heads. The text describes the applications of radioisotope instruments in the industries, including mining and quarrying; agriculture, forestry, and fishing; manufacturing industries; transport and communications; and civil engineering constructions. The manuscript also focuses on legislation and codes of practice on the use of sealed radioisotope sources and control of radiation hazard. The book is a dependable reference for readers interested in radioisotope instruments.
Download or read book An Introduction to Online Platforms and Their Role in the Digital Transformation written by OECD and published by OECD Publishing. This book was released on 2019-05-13 with total page 218 pages. Available in PDF, EPUB and Kindle. Book excerpt: This report contains detailed profiles of twelve of the world’s leading platform companies and derives insights from those profiles about what platforms actually do, how they do it, and why they succeed financially.
Download or read book All it Is It s a Carnival written by Mária Németh Lenke and published by . This book was released on 2007 with total page 164 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Modern Surface Organometallic Chemistry written by Jean-Marie Basset and published by John Wiley & Sons. This book was released on 2009-07-10 with total page 725 pages. Available in PDF, EPUB and Kindle. Book excerpt: Covering everything from the basics to recent applications, this monograph represents an advanced overview of the field. Edited by internationally acclaimed experts respected throughout the community, the book is clearly divided into sections on fundamental and applied surface organometallic chemistry. Backed by numerous examples from the recent literature, this is a key reference for all chemists.
Download or read book Applied Mineralogy in the Mining Industry written by W. Petruk and published by Elsevier. This book was released on 2000-11-29 with total page 287 pages. Available in PDF, EPUB and Kindle. Book excerpt: Techniques of performing applied mineralogy investigations, and applications and capabilities of recently developed instruments for measuring mineral properties are explored in this book intended for practicing applied mineralogists, students in mineralogy and metallurgy, and mineral processing engineers. The benefits of applied mineralogy are presented by using in-depth applied mineralogy studies on base metal ores, gold ores, porphyry copper ores, iron ores and industrial minerals as examples. The chapter on base metal ores includes a discussion on the effects of liberation, particle sizes and surfaces coatings of Pb, Cu, Fe, Ca and So4- on the recoveries of sphalerite, galena and chalcopyrite. The chapter on gold discusses various methods of determining the quantities of gold in different minerals, including 'invisible' gold in pyrite and arsenopyrite, so that a balance of the distribution of gold among the minerals can be calculated. This book also discusses the roles of pyrite, oxygen, moisture and bacterial (thiobacillus ferrooxidans) on reactions that produce acidic drainage from tailings piles, and summarizes currently used and proposed methods of remediation of acidic drainage.
Download or read book Nuclear Geophysics written by Colin Geoffrey Clayton and published by Pergamon. This book was released on 1983 with total page 496 pages. Available in PDF, EPUB and Kindle. Book excerpt: Hardbound. Nuclear techniques are critical in the exploration for oil and in the control of oil wells, and intrinsic to uranium exploration. This volume includes comprehensive review articles by internationally eminent scientists and engineers, on a wide variety of techniques and applications in the area of nuclear geophysics, including important new techniques and equipment being developed for use in the metalliferous and industrial minerals industries. Also included is a description of neutron interaction methods now being introduced to give a total elemental analysis, calorific value and ash-content, on-line.
Download or read book Microscopic Simulation of Interfacial Phenomena in Solids and Liquids Volume 492 written by Simon R. Philllpot and published by . This book was released on 1998-04-24 with total page 440 pages. Available in PDF, EPUB and Kindle. Book excerpt: The MRS Symposium Proceeding series is an internationally recognised reference suitable for researchers and practitioners.
