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  • Chemistry  (394,210)
  • 550 - Earth sciences  (19,122)
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  • 1
    Online Resource
    Online Resource
    Berlin, Heidelberg : Springer Berlin Heidelberg
    Keywords: Physics ; Chemistry, Physical and theoretical ; Atoms ; Physics ; Chemistry ; Plasma (Ionized gases) ; Theoretical and Computational Chemistry ; Physics ; Atoms, Molecules, Clusters and Plasmas
    Description / Table of Contents: Semiclassical Theory of Atoms presents a novel approach to theoretical atomic physics. The fundamental quantity in this new, powerful formalism is the effective potential, not the density. The starting point is the highly semiclassical approximation known as the Thomas-Fermi model. It is studied in great detail, and then refined in three steps by adding quantum corrections successively according to their importance. First, the strongly bound electrons are treated in detail. Second, the bulk of electrons is better described by introducing quantum corrections to the Thomas-Fermi treatment and by including the exchange interaction. At this stage, predicted binding energies, for instance, are correct to within a small fraction of a percent. Third, shell effects are introduced. The improved semiclassical treatment is then sufficiently refined to reproduce the systematics of the Periodic Table. It addresses the graduate student with a good knowledge of elementary quantum mechanics
    Type of Medium: Online Resource
    Pages: 1 Online-Ressource (VII, 402 p. 1 illus)
    Edition: Springer eBook Collection. Physics and Astronomy
    ISBN: 9783540391418 , 9783540192046
    Series Statement: Lecture Notes in Physics 300
    Language: English
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  • 2
    Keywords: Materials science ; Optical materials ; Electronic materials ; Materials Surfaces ; Thin films ; Chemistry ; Optical materials ; Surfaces (Physics) ; Optical and Electronic Materials ; Chemistry ; Surfaces and Interfaces, Thin Films
    Description / Table of Contents: Electron-electron interactions in the physics of the 1D conductors -- Generalized wigner lattices and band motion effects -- Relationship between the 1-D fermi gas model and other models -- Electronic structure of the three phases in MEM(TCNQ)2 -- Experiments on the phase transitions in MEM(TCNO)2 -- The spin-peierls transition and other aspects of the magnetic behavior of the compounds TTF · MS4C4(CF3)4(M = Pt, Cu, Au) -- New theory of the spin-peierls transition with special relevance to the experiments on TTFCuBDT -- Theory for the order - disorder and metal-insulator phase-transitions in (Ti 1-C VC) 407 -- Analogies between a three-dimensional coulomb gas in a strong magnetic field and the one-dimensional electron gas with backward scattering -- Gap renormalization in the one-dimensional electron gas with backward scattering -- Properties of the one-dimensional electron gas -- The new method in the theory of nearly ideal one-dimensional fermi-gas. correlation functions -- Novel method to calculate the response functions of the tomonaga model -- Peterls dimerization and excitonic effects on the interband absorption of an antiferromagnetic hubbard chain -- Collective mode in quasi one-dimensional spin lattice coupled system -- Double resonance identification of the magnetic chain in quinolinium(TCNQ)2 -- Very low temperature magnetic phase transition in Pyridinium (TCNQ)2 -- Friedel oscillation in one-dimensional Hubbard model -- Spin-Peierls transition in magnetic field -- One-dimensional phonons and chain-ordering in Hg3-?AsF6 -- One-dimensional fluctuations and the chain-ordering transformation in Hg 3-?AsF6* -- Magnetic field induced residual resistivity and anisotropic superconductivity in the linear chain compound, Hg3-?AsF6 -- X-ray scattering studies on the quasi-one-dimensional conductors NbSe3 and TTF-SCN -- Lattice distortions and phonons in organic conductors with incommensurate lattices -- The crystal structures of electroconducting cation-radical salts -- New conducting ternary compounds (Ammonium-TCNQ-Iodine) the example of tmhda salt (Tetramethylhexamethylenediammonium) -- X-Ray diffuse scattering study of iodine chains in (TTT)2 I3+? -- Effects of disorder on the thermoelectric power and electrical conductivity of TTT2I3 -- Preparation, structure, and electrical conduction properties of quasi one dimensional platino-oxalates -- Electrical conductivity studies of K1.75[Pt(CN)4]1.5H2O ? K(def)CP. -- Phonon dispersion and neutron scattering law S(k,?) for a quasi-one-dimensional Peierls-system -- Interpretation of the infrared and Resonance Raman spectra of linear mixed valence compounds -- Evidence for a new type of orientational antiphase structure in platinum chain compounds -- Raman scattering and luminescence in K1.75Pt(CN)4·1.5H2O (K(def)TCP) -- Multiple band electron-phonon transport theory in A15-compounds -- Mean field theory of a one-dimensional band conductor, with arbitrary band filling -- Conductivity of quasi-one-dimensional metal system with random impurities -- Disordered 1D conductors -- Disordered magnetic chain behavior of quinolinium (TCNQ)2 and related materials at low temperatures -- Band filling, mobility and disorder in molecular conductors -- Transport and magnetic properties of a doped organic semiconductor - TTF with bromine -- Effects of impurities on the ordered phases of one-dimensional systems -- The effects of a low temperature irradiation on TTF-TCNQ and related compounds -- One dimensional spin glasses with antiferromagnetic exchange -- Magnetism in one-dimensional disordered systems -- Electron transmission and wave propagation through one dimensional disordered system -- Localization of spin waves in a dilute magnet near the percolation threshold -- Molecular substitutional disorder in solid solutions of TTF-TCNQ and TSeF-TCNQ -- Low temperature magnetic susceptibility of three complex tcnq salts with asymetric donors -- Low temperature magnetic susceptibility of the organic alloy NMP0.63phenazine0.37TCNQ -- Charge transfer c0mplexes of ferrocenes and TCNQ -- Some charge transfer salts of fluorinated TCNQ; mott insulators isostructural with organic conductors -- ACP(CL), a close analogue of KCP(Br) -- Physical properties of organic metallic compounds : radical-cations salts of TTT and TSeT with iodine -- The physical and chemical properties of the reaction product between trimethylammonium iodide and TCNQ. a ternary 1-D semiconductor with ‘metal-like’ conductivity -- Salts of TCNQ and heterocyclic amnes conjugated acids - New organic conductors via redox-reaction : Heterocyclic amines - TCNQ - hydroquinone -- Highly conducting salt: Tetpaphenyldithiadipyranylidene-iodine, dipsø4/I2.28 -- Optical and transport properties of TTT IxBr1.5?x alloys -- Semiconducting and metallic organic polymers: Chemically doped polyacetylene, (CH)x -- Transport properties of doped polyacetylene -- Properties of brominated (SN)x -- X-ray absorption in polymeric conductors -- Conductivity and magnetoresistance of the halogenated (SN)x-derivates: (SNBr0.4)x, (SNI0.02)x, [SN(ICI)0.1]x -- Magnetic properties of filamentary superconductors -- (SN)x semiconductor solar cells -- Conducting polymers -- Electronic structure of trans- and cis-polyacetylene -- Hall effect in AsF5 doped polyacetylene, (CH)x -- Kohn anomalies in the phonon dispersion on polysulfur nitride, (SN)x -- The electrical conductivity of poly(sulphur nitride) at microwave frequencies -- Low temperature thermal conductivity of polysulfur nitride, (SN)x. -- Structure of brominated (SN)x and S4N4 -- An electronic model for the high conductivity in brominated-(SN)x and in (SN)x under pressure -- Linear temperature dependence of the magnetic susceptibility of brominated (SN)x -- Fluctuation magneto conductivity of a finite fibre -- Role of symmetry in the study of quasi one-dimensional systems -- Graph-theoretical approach to the estimation of the energy gap of polymeric conjugated hydrocarbons -- Temperature dependence and anisotropy of hc2 in superconducting (SN)x
    Type of Medium: Online Resource
    Pages: 1 Online-Ressource
    Edition: Springer eBook Collection. Physics and Astronomy
    ISBN: 9783540353423 , 9783540092414
    Series Statement: Lecture Notes in Physics 96
    Language: English
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  • 3
    Online Resource
    Online Resource
    Berlin, Heidelberg : Springer Berlin Heidelberg
    Keywords: Chemistry ; Physical chemistry ; Polymers ; Thermodynamics ; Atoms ; Physics ; Statistical physics ; Dynamical systems ; Chemistry ; Chemistry, Physical organic ; Polymers ; Statistical physics ; Thermodynamics ; Plasma (Ionized gases) ; Chemistry ; Thermodynamics ; Atoms, Molecules, Clusters and Plasmas ; Physical Chemistry ; Statistical Physics ; Polymer Sciences
    Description / Table of Contents: This monograph gives a detailed introductory exposition of research results for various models, mostly two-dimensional, of directed walks, interfaces, wetting, surface adsorption (of polymers), stacks, compact clusters (lattice animals), etc. The unifying feature of these models is that in most cases they can be solved analytically. The methods used include transfer matrices, generating functions, recurrence relations, and difference equations, and in some cases involve utilization of less familiar mathematical techniques such as continued fractions and q-series. The authors emphasize an overall view of what can be learned generally of the statistical mechanics of anisotropic systems, including phenomena near surfaces, by studying the solvable models. Thus, the concept of scaling and, where known, finite-size scaling properties are elucidated. Scaling and statistical mechanics of anisoptropic systems in general are active research topics. The volume provides a comprehensive survey of exact model results in this field
    Type of Medium: Online Resource
    Pages: 1 Online-Ressource (VI, 122 p. 1 illus)
    Edition: Springer eBook Collection. Physics and Astronomy
    ISBN: 9783540481201 , 9783540514299
    Series Statement: Lecture Notes in Physics 338
    Language: English
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  • 4
    Online Resource
    Online Resource
    Berlin, Heidelberg : Springer Berlin Heidelberg
    Keywords: Economics ; Engineering mathematics ; Mathematical optimization ; Numerical analysis ; Systems theory ; Chemistry ; Globale Optimierung ; Algorithmus ; Leistungsbewertung ; Softwaretest
    Type of Medium: Online Resource
    Pages: Online-Ressource
    ISBN: 9783540463276
    Series Statement: Lecture Notes in Computer Science 455
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    Language: English
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  • 5
    Online Resource
    Online Resource
    Versailles : Quæ
    Keywords: Electronic books ; Berg ; Sozioökonomisches System ; Agrarökologie ; Guimet, Louis 1925-1993 ; Berglandwirtschaft ; Politisches Handeln ; Wirtschaftsentwicklung
    Description / Table of Contents: Plus de 40 auteurs, tous porteurs de la question montagnarde, de l'éleveur au haut fonctionnaire, en passant par l'élu, le socio-professionnel, le chercheur... présentent la montagne, 20 % du territoire national et milieu d'exception où la nature rencontre les dimensions socio-économiques. Le recueil est organisé à partir d'un itinéraire professionnel, celui de Louis Guimet, premier chef du Département montagne du Cemagref, disparu en juin 1993.
    Type of Medium: Online Resource
    Pages: 1 Online-Ressource (277 Seiten)
    ISBN: 9782759213955
    Series Statement: Hors Collection
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    Language: French
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  • 6
    Keywords: Electronic books ; Konferenzschrift 1994 ; Agroforstwirtschaft ; Landwirtschaft ; Landwirtschaftlicher Betrieb ; Allokation ; Arbeitsorganisation
    Description / Table of Contents: Dans le cadre de la mise en place d'un programme commun, les chercheurs de l'INRA et du Cemagref s'interrogent sur la forêt paysanne et l'agroforesterie. Sont étudiés : le développement ou l'introduction d'activités forestières dans des exploitations agricoles, leurs effets sur l'organisation du travail, l'affectation des terres et du capital.
    Type of Medium: Online Resource
    Pages: 1 Online-Ressource (247 Seiten)
    ISBN: 9782759210534
    Series Statement: Actes de Colloques
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    Language: French
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  • 7
    Keywords: Electronic books ; Lauge ; Ammoniak ; Gülle ; Stickstoff ; Ammoniakemission ; Düngemittel ; Schadstoffbelastung
    Description / Table of Contents: La volatilisation de l'azote ammoniacal des lisiers, consécutive à l'épandage sur les terres agricoles, contribue à diminuer leur valeur fertilisante et à augmenter la charge polluante de l'air. Deux études, l'une menée sur le terrain, l'autre en laboratoire, précisent l'importance des émissions d'ammoniac et les facteurs qui influencent ce processus.
    Type of Medium: Online Resource
    Pages: 1 Online-Ressource (219 Seiten)
    ISBN: 9782759215836
    Series Statement: Études du Cemagref 20
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    Language: French
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  • 8
    Keywords: War and emergency powers ; Judicial review of administrative acts ; War and emergency powers -- Germany (West) ; Judicial review of administrative acts -- Germany (West) ; Electronic books
    Description / Table of Contents: Intro -- I. Eröffnung -- II. Erster Beratungsgegenstand: Kabinettsfrage und Gesetzgebungsnotstand nach dem Bonner Grundgesetz -- 1. Bericht von Professor Dr. Walter Jellinek, Heidelberg -- 2. Mitbericht von Professor Dr. Hans Schneider, Göttingen -- 3. Aussprache -- III. Zweiter Beratungsgegenstand: Tragweite der Generalklausel im Art. 19 Abs. 4 des Bonner Grundgesetzes -- 1. Bericht von Professor Dr. Friedrich Klein, Münster i. W. -- 2. Mitbericht von Professor Dr. Heinrich Herrfahrdt, Marburg -- 3. Aussprache -- IV. Verzeichnis der Redner -- V. Verzeichnis der Mitglieder der Vereinigung der Deutschen Staatsrechtslehrer -- VI. Satzung der Vereinigung.
    Type of Medium: Online Resource
    Pages: 1 online resource (175 pages)
    ISBN: 9783110900736
    Series Statement: Veröffentlichungen der Vereinigung der Deutschen Staatsrechtslehrer Ser. v.8
    Language: German
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  • 9
    Keywords: Electronic books
    Description / Table of Contents: Intro -- Copyright Page -- Dans la même collection aux éditions du Cemagref - (prix TTC) -- Title Page -- Preface -- Table of Contents -- Chapter I - Identification of forest reproductive material -- Use of biochemical and molecular markers for identification of forest reproductive material -- Abstract -- Introduction -- References -- The homogeneity, identification, and classification of provenances, regions of provenance, and seed orchards -- Abstract -- Introduction -- Conclusion -- References -- Synthesis of identification problems of forest reproductive material -- Abstract -- Summary of Session 1: Identification of Forest Reproductive Material -- 1. Identification -- 2. Provenance regions -- 3. Problems and status of hybrids -- - Chapter 2 - - Evaluation of forest reproductive material -- National and international networks of experimentations -- 1. International experimention -- 2. Legal regulations -- 3. Research and gene conservation -- References -- Marker-assisted selection for the evaluation of forest reproductive material -- Abstract -- Introduction -- Conclusions -- References -- Age-age correlations for the evaluation of forest reproductive material -- Abstract -- Introduction -- Conclusions -- References -- Evaluation of forest reproductive material -- 1. Implementation and management of the directives -- 2. Uniformity in comparative testing -- 3. Juvenile selection and marker aided selection -- Conclusions -- - Chapter 3 - - How to use forest material ? -- Can blue label be independent from conditions of use (edaphic, sylviculture)? -- Introduction -- Conclusion -- Is it better to regulate the commerce or the use of forest reproductive materials ? -- Abstract -- Introduction -- Optional species -- Reinforcement of the practical control -- Conclusions -- References -- Utilization of forest material The need for regulations.
    Type of Medium: Online Resource
    Pages: 1 online resource (183 pages)
    ISBN: 9782759214747
    Series Statement: Actes de Colloques Ser.
    Language: English
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  • 10
    Keywords: Electronic books ; Landwirtschaft ; Ländlicher Raum ; Raumordnung
    Description / Table of Contents: Méthode de caractérisation de la diversité des comportements fonciers des agriculteurs à l'échelle d'une petite région rurale, dans le but de fournir aux responsables locaux des éléments d'aide à la décision dans le domaine de l'aménagement de l'espace rural.
    Type of Medium: Online Resource
    Pages: 1 Online-Ressource (249 Seiten)
    ISBN: 9782759214525
    Series Statement: Les Études du Cemagref 14
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    Language: French
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