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  • 1
    Online Resource
    Online Resource
    Dordrecht :Springer Netherlands,
    Keywords: Gravitation. ; Gauge fields (Physics). ; Electronic books.
    Description / Table of Contents: This is the first book devoted to teleparallel Gravity (TG), an alternative theory for gravitation, which is equivalent to General Relativity (GR). Shows how TG attributes gravitation to torsion, which accounts for gravitation by acting as a force.
    Type of Medium: Online Resource
    Pages: 1 online resource (215 pages)
    Edition: 1st ed.
    ISBN: 9789400751439
    Series Statement: Fundamental Theories of Physics Series ; v.173
    Language: English
    Note: Intro -- Teleparallel Gravity -- Preface -- Contents -- Chapter 1: Basic Notions -- 1.1 Linear Frames and Tetrads -- 1.1.1 Trivial Frames -- 1.1.2 Nontrivial Frames -- 1.2 Lorentz Connections -- 1.3 Curvature and Torsion -- 1.4 Local Lorentz Transformations -- 1.5 Bianchi Identities -- 1.6 Levi-Civita Symbol -- 1.7 Torsion Decomposition -- References -- Chapter 2: Lorentz Connections and Inertia -- 2.1 Purely Inertial Connection -- 2.2 Particle Equation of Motion -- 2.3 Four-Acceleration and Parallel Transport -- 2.4 Inertial Effects -- References -- Chapter 3: Gauge Theories and Gravitation -- 3.1 The Gauge Tenets -- 3.1.1 Gauge Transformations -- 3.1.2 Gauge Potential and Field Strength -- 3.1.3 Field Equations -- 3.1.4 Classical Equations of Motion -- 3.1.5 Duality Symmetry and Beyond -- 3.2 General Relativity -- 3.3 Gravitation and the Gauge Paradigm -- References -- Chapter 4: Fundamentals of Teleparallel Gravity -- 4.1 Some Historical Remarks -- 4.2 Geometrical Setting -- 4.3 Gauge Transformations of Source Fields -- 4.4 Gauge Coupling Prescription -- 4.4.1 The Electromagnetic Case as an Example -- 4.4.2 Translational Coupling Prescription -- 4.4.3 Translational Coupling in a General Frame -- 4.5 Translational Field Strength -- 4.6 Fundamental Fields -- References -- Chapter 5: Gravitational Coupling Prescription -- 5.1 Translational Coupling Revisited -- 5.2 Lorentz Coupling Prescription -- 5.2.1 General Covariance Principle -- 5.2.2 Passage to an Anholonomic Frame -- 5.2.3 Identifying Inertia with Gravitation -- 5.3 Full Gravitational Coupling Prescription -- 5.4 Possible Connections -- References -- Chapter 6: Particle Mechanics -- 6.1 Free Particles Revisited -- 6.1.1 Basic Notions -- 6.1.2 Equation of Motion of Free Particles -- 6.2 Gravitationally Coupled Particles -- 6.2.1 Coupling Prescription. , 6.2.2 Gravitationally Coupled Equation of Motion -- 6.2.3 Equivalence with the Geodesic Equation -- 6.3 Newtonian Limit -- 6.4 Gravitomagnetic Field -- 6.5 Separating Inertial Effects from Gravitation -- 6.6 A Genuine Gravitational Connection -- References -- Chapter 7: Global Formulation for Gravity -- 7.1 Phase Factor Approach -- 7.2 Colella-Overhauser-Werner Experiment -- 7.3 Gravitational Aharonov-Bohm Effect -- 7.4 Quantum Versus Classical Approaches -- References -- Chapter 8: Hodge Dual for Soldered Bundles -- 8.1 Why a New Dual -- 8.2 Dual Torsion -- 8.3 Dual Curvature -- References -- Chapter 9: Lagrangian and Field Equations -- 9.1 Lagrangian of Teleparallel Gravity -- 9.2 Equivalence with Einstein-Hilbert -- 9.3 Matter Energy-Momentum Density -- 9.4 Field Equations -- 9.5 Bianchi Identities -- 9.6 A Glimpse into New General Relativity -- References -- Chapter 10: Gravitational Energy-Momentum Density -- 10.1 Introduction -- 10.2 Field Equations and Conservation Laws -- 10.3 Teleparallel Gravity -- 10.4 General Relativity -- 10.5 Comparison with the Gauge Self-current -- References -- Chapter 11: Gravitation in the Lack of Universality -- 11.1 Gravitation and Universality -- 11.2 The Electromagnetic Coupling Prescription -- 11.3 Gravitation Without Universality -- 11.3.1 Non-universal Coupling Prescription -- 11.3.2 Particle Equation of Motion -- 11.3.3 Global Formulation and the COW Experiment -- 11.4 Non-universality and General Relativity -- References -- Chapter 12: Gravitational Coupling of the Fundamental Fields -- 12.1 Representations of the Lorentz Group -- 12.2 Gravitational Coupling Revisited -- 12.3 Scalar Field -- 12.4 Dirac Spinor Field -- 12.4.1 The Dirac Equation -- 12.4.2 Torsion Decomposition and Spinors -- 12.5 Electromagnetic Field -- References -- Chapter 13: Spin-2 Field Coupled to Gravitation. , 13.1 Conformal Transformations -- 13.2 Fundamental Spin-2 Field -- 13.3 The Flat Spacetime Case -- 13.3.1 Gauge Transformations -- 13.3.2 Field Strength and Bianchi Identity -- 13.3.3 Lagrangian and Field Equation -- 13.3.4 Duality Symmetry -- 13.3.5 Passage to a General Frame -- 13.3.6 Relation to the Metric Approach -- 13.4 Coupling to Gravitation -- 13.4.1 Gravitational Coupling Prescription -- 13.4.2 Field Strength and Bianchi Identity -- 13.4.3 Lagrangian and Field Equation -- 13.5 Spin-2 Field as Source of Gravitation -- 13.6 On Gravitational Waves -- References -- Chapter 14: Teleparallel Equivalent of Some Solutions -- 14.1 de Sitter Spacetime -- 14.1.1 de Sitter Torsion -- 14.1.2 The de Sitter Torsion -- 14.1.3 The de Sitter Force -- 14.2 Teleparallel Equivalent of the Kerr Solution -- 14.2.1 Kerr Torsion -- References -- Chapter 15: Duality Symmetry -- 15.1 Introduction -- 15.2 Duality Symmetry and Gravitation -- 15.3 Linear Gravity -- 15.4 Looking for a Dual Gravity -- 15.5 Some Properties of the Self-dual Gravity -- References -- Chapter 16: Teleparallel Kaluza-Klein Theory -- 16.1 Introduction -- 16.2 Kaluza-Klein Theory: A Brief Review -- 16.3 Five-Vector Potential -- 16.4 Teleparallel Kaluza-Klein -- 16.5 Metric Constraint -- 16.6 Matter Fields -- 16.7 Further Remarks -- References -- Chapter 17: Einstein-Cartan Theory -- 17.1 Introduction -- 17.2 Field Equations -- 17.3 Gravitational Coupling Prescription -- 17.4 Particle Equations of Motion -- 17.5 Some Drawbacks -- References -- Chapter 18: Why to Study Teleparallel Gravity -- 18.1 On the Gravitational Interaction -- 18.2 On Teleparallel Gravity -- 18.2.1 A Gauge Theory for Gravitation -- 18.2.2 Matters of Consistency -- 18.2.3 Gravitational Energy-Momentum Density -- 18.2.4 Coupling of a Fundamental Spin-2 Field to Gravitation -- 18.2.5 Gravitation and Quantum Mechanics. , 18.2.6 Quantizing Gravity -- 18.2.7 A New Insight into Gravity -- References -- Appendix A: The Spinning Particle -- A.1 Action Functional -- A.2 Equations of Motion -- References -- Appendix B: The Connection Space -- B.1 The Space of Lorentz Connections -- B.2 Equivalence Under Contortion Translations -- References -- Appendix C: Teleparallel Field Equation -- C.1 Lagrangian and Field Equation -- C.2 The Superpotential -- C.3 The Energy-Momentum Current -- Appendix D: Dirac Equation -- D.1 Relativistic Fields -- D.2 Dirac Field -- D.3 Covariant Form of the Dirac Equation -- D.4 Spinor Basis and Currents -- References -- Index.
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  • 2
    Online Resource
    Online Resource
    Barcelona :Editorial UOC,
    Keywords: Science television programs. ; Electronic books.
    Description / Table of Contents: La televisión es un medio con grandes posibilidades para trasladar la ciencia hasta el gran público. Sin embargo, ciencia y televisión pueden ser compañeros incómodos, habida cuenta de que, en principio, tienen objetivos y modos expresivos bien distintos. La distancia entre ambos resulta incluso mayor en el actual contexto televisivo, dominado por el entretenimiento. Ante la pregunta de si es posible comunicar la ciencia a través de la televisión surge, de modo inmediato, el referente del documental; un género que acredita una larga trayectoria en la comunicación eficaz de conocimientos científicos, convertidos en contenidos interesantes y comprensibles para el gran público. Esta monografía traza algunas líneas maestras para comprender el modo en que el documental construye sus peculiares procesos de comunicación, partiendo del estudio de medio centenar de obras producidas en la última década, por las más prestigiosas productoras y cadenas de televisión europeas. El análisis de estos trabajos permite entender los mecanismos narrativos, dramáticos y retóricos en los que se basa la comunicación eficaz de la ciencia a través de la televisión.
    Type of Medium: Online Resource
    Pages: 1 online resource (150 pages)
    Edition: 1st ed.
    ISBN: 9788490290705
    Series Statement: Manuales Series
    DDC: 791.45656
    Language: Spanish
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  • 3
    Type of Medium: Book
    Series Statement: ICES council meeting papers 1983(59)
    Language: Undetermined
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  • 4
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Science Inc
    The @breast journal 11 (2005), S. 0 
    ISSN: 1524-4741
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Type of Medium: Electronic Resource
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  • 5
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Publishing Ltd
    Journal of esthetic and restorative dentistry 11 (1999), S. 0 
    ISSN: 1708-8240
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: Abstract: The use of adhesive material in association with many clinical procedures has contributed a great deal to solving functional and esthetic problems. Before adhesive techniques were known, dental procedures were more invasive and aggressive, especially in young patients. This article describes some integrated clinical procedures used to esthetically and functionally restore a mouth with traumatic loss of both central incisors. The treatment involved the orthodontic mesialization of the upper teeth toward the midline followed by anatomic and functional recovery through restorative dentistry.
    Type of Medium: Electronic Resource
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  • 6
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Publishing Ltd
    Journal of esthetic and restorative dentistry 12 (2000), S. 0 
    ISSN: 1708-8240
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: Purpose: The purpose of this study was to assess noncarious cervical lesions in young patients and to establish a possible relation with occlusal aspects. Materials and Methods: Forty-eight dental students (28 males; 20 females) between the ages of 16 and 24 years, were investigated to verify the presence of noncarious cervical lesions and their relation to some occlusal aspects. The assessment involved a questionnaire, clinical examinations, and model analysis. Results: The results indicated that the lower first molars (21.3%), the upper first molars (16.0%), the upper first premolars (12.8%), the lower first premolars (11.7%), and the lower second premolars (11.7%) were the teeth most affected by the lesions. Age was a significant factor with respect to the presence of lesions; the students with noncarious cervical lesions were older than the students who showed no lesions. Among the 79 teeth exhibiting lesions, 62 (78.5%) showed wear facets. In the group with lesions, the mean, per subject, was 15.0 teeth with wear facets, whereas in the group without lesions the mean was 10.8 teeth with wear facets per subject, suggesting that occlusal stress has some effect on lesion development.CLINICAL SIGNIFICANCENoncarious cervical lesions are characterized by loss of tooth structure on the cervical area of the tooth and can result in esthetic problems for the patient, as well as discomfort due to the hyper-sensibility that often occurs at the location of the lesion. The results obtained reinforce the multifactorial theory, shared by several authors, for the etiology of such lesions. However, as the limitations of each etiologic agent begin to be understood, there will be a decrease in the possibility of misleading interpretations of the result of present or future investigations.
    Type of Medium: Electronic Resource
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  • 7
    ISSN: 1520-6041
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
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  • 8
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Publishing Ltd
    Journal of the World Aquaculture Society 34 (2003), S. 0 
    ISSN: 1749-7345
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Formulated feed for freshwater prawn farming under semi-intensive conditions is expensive, presenting a significant portion of the farm's operating costs. Production and availability of natural food in earthen ponds may reduce the needs for formulated feed. This paper evaluates growth of freshwater prawn Macrobrachiurn rosenbergii under three feeding regimes, where supplemental feed was reduced and natural productivity of the ponds was increased by a fertilization program that included the addition of lime, phosphorus and nitrogen. Prawns (4.35 g) were stocked into 12 50-m2 earthen ponds (6 juveniles/m2) and grown for 84 d feeding on 25% crude protein ration. Chemical and physical water parameters were monitored routinely. Growth and production were similar at 100% formulated feed supplementation with no fertilization and at 50% formulated feed with fertilization, as determined by weight gain, specific growth rate, and net yield (P 〉0.05). However, further reduction in feed supplementation (0, 25%, and 50% of feeding rate, respectively, for each subsequent 28-d period) with fertilization, yielded shrimp smaller than market size. Feed conversion ratios were significantly higher (P 0.05) for the 100% versus the 50% feed supplementation. Survival rate averaged 86% with no significant differences among treatments. Reducing up to 50% of the supplemental feed with added fertilization for increased natural productivity does not reduce yield of M. rosenbergii raised under semi-intensive conditions in northeastern Brazil. Under the local conditions of semi-arid and warm water temperatures (24.0–33.5 C), increasing natural productivity of ponds significantly improves feed conversion ratio, which is reflected in feed cost savings and potential savings of the farm operating cost.
    Type of Medium: Electronic Resource
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  • 9
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Publishing Ltd
    International journal of dermatology 27 (1988), S. 0 
    ISSN: 1365-4632
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: : Circulating polymorphonuclear leukocyte (CPMN) functions were studied in patients with widespread psoriasis as well as in persons with chronic alcoholic liver disease (CALD), paracoccidioldomycosis, diverse granulomatous diseases, and normal individuals. We were unable to find stimulation or increase in CPMN functions in patients with psoriasis compared to normal individuals. Leukocytes, from individuals with CALD had a lowering of their metabolic activation, chemotaxis, random movement, and adherence, CPMNs from patients with paracoccidioldomycosis showed a significant deficiency in their ability to digest Paracoccidioides brasiliensis. Our results are against the concept that functions of circulating PMNs are stimulated in psoriatics.
    Type of Medium: Electronic Resource
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  • 10
    Electronic Resource
    Electronic Resource
    Springer
    Bulletin of environmental contamination and toxicology 31 (1983), S. 257-262 
    ISSN: 1432-0800
    Source: Springer Online Journal Archives 1860-2000
    Topics: Energy, Environment Protection, Nuclear Power Engineering , Medicine
    Type of Medium: Electronic Resource
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