Accelerated aging of materials and structures : the effects of long-term elevated-temperature exposure / / National Research Council

• Record Nr.: UNINA9910449819703321
• Pubbl/distr/stampa: Washington, District of Columbia : , : National Academy Press, , 1996; ©1996
• Descrizione fisica: 1 online resource (65 p.)
• Collana: Publication NMAB ; ; 479
• Disciplina: 620.16
• Soggetti: Metallic composites; Materials - Deterioration; Airplanes - Materials - Deterioration; Electronic books.
• Lingua di pubblicazione: Inglese
• Formato: Materiale a stampa
• Livello bibliografico: Monografia
• Note generali: Description based upon print version of record.
• Nota di bibliografia: Includes bibliographical references.
• Nota di contenuto: ACCELERATED AGING OF MATERIALS AND STRUCTURES; Copyright; COMMITTEE ON EVALUATION OF LONG-TERM AGING OF MATERIALS AND STRUCTURES USING ACCELERATED TEST METHODS; NATIONAL MATERIALS ADVISORY BOARD; Acknowledgments; Preface; Contents; Executive Summary; MATERIALS AGING CHARACTERIZATION; Service Environment; Materials and Degradation Mechanisms; Characterization of Aging Responses; Accelerated Methods; Analysis of Structures; REPORT ORGANIZATION; 1 Introduction; AGING OF MATERIALS AND STRUCTURES; CASE STUDY: HIGH-SPEED CIVIL TRANSPORT; 2 Aircraft Operating Environment; THE CONCORDE EXPERIENCE; HSCT CONDITIONSGround Exposure; Flight Exposure; Airframe; Engine; SUMMARY AND RECOMMENDATION; 3 Candidate Materials; ALUMINUM ALLOYS; TITANIUM ALLOYS; SUPERALLOYS; POLYMER-MATRIX COMPOSITES; Thermoset Matrices; Thermoplastic Matrices; CERAMIC-MATRIX COMPOSITES; 4 Degradation Mechanisms; ALUMINUM ALLOYS; Microstructural Changes; Residual Stresses; Strength; Toughness; Time-Dependent Deformation and Damage Accumulation; Fatigue; Creep; Environmental Effects; Summary: Aluminum Degradation Mechanisms; TITANIUM ALLOYS; Microstructural Variations; ; Deformation Processes; Environmental Effects; Summary: Titanium Degradation MechanismsSUPERALLOYS; Microstructural Changes; Deformation and Damage Accumulation; Oxidation; POLYMER-MATRIX COMPOSITES; Microstructural Changes; Damage Accumulation: Matrix Cracking; Environmental Effects; Thermal Degradation and Oxidation; Hygrothermal Effects; Summary: Polymer-Matrix Composite Degradation Mechanisms; CERAMIC-MATRIX COMPOSITES; Thermochemical Degradation; Mechanical Degradation: Effects of Corrosive Reactions; Summary: Ceramic-Matrix Composite Degradation Mechanisms; RECOMMENDATION; 5 Accelerated Methods for Characterization of Aging Response; METALLIC ALLOYSThe Concorde Experience; Creep Deformation and Failure; Creep-Fatigue Failure; Creep and Creep-Fatigue Crack Growth; Acceleration and Analytical Methods; Microstructural Changes; Accelerating Creep Tests; Accelerating Fatigue Tests; POLYMER-MATRIX COMPOSITES; Current Methods; Moderate- Temperature Applications; High-Temperature Applications; Accelerated Methods; Thermal Degradation and Oxidation; Matrix Cracking; Hygrothermal Effects; CERAMIC SYSTEMS; Oxidation and Volatilization; Mechanical Response; Behavior of the Constituents; Behavior of the Composite; ANALYSIS OF STRUCTURESMetallic Materials; Composite Materials; CHAPTER SUMMARY, CONCLUSIONS AND RECOMMENDATIONS; Characterization Methods; Accelerated Methods; Analysis of Structures; Approach to Materials Aging Characterization; References; Appendix Biographical Sketches of Committee Members

Big data science in finance / / by Irene Aldridge, Marco Avellaneda

• Record Nr.: UNINA9910798929203321
• Autore: Aldridge Irene <1975->
• Pubbl/distr/stampa: Hoboken, New Jersey : , : Wiley, , [2021]; ©2021
• ISBN: 1-119-60299-8; 1-119-60297-1
• Descrizione fisica: 1 online resource (339 pages)
• Disciplina: 005.7
• Soggetti: Big data; Finance - Decision making - Data processing
• Lingua di pubblicazione: Inglese
• Formato: Materiale a stampa
• Livello bibliografico: Monografia
• Nota di contenuto: Why big data? -- Neural networks in finance -- Supervised models -- Semi-supervised learning -- Letting the data speak with unsupervised learning -- Big data factor models -- Data as a signal versus noise -- Applications : big data in options pricing and stochastic modeling -- Data clustering.
• Sommario/riassunto: "Data Science has overtaken the way the finance and investment is done on Wall Street. All tools and techniques driving decision-making are being revamp with the help of applied mathematics and code"--

Magnetic properties of solids / / Kenneth B. Tamayo, editor

• Record Nr.: UNINA9910970060903321
• Pubbl/distr/stampa: New York, : Nova Science Publishers, c2009
• ISBN: 1-61728-534-X
• Edizione: [1st ed.]
• Descrizione fisica: 1 online resource (356 p.)
• Collana: Materials science and technologies series
• Altri autori (Persone): TamayoKenneth B
• Disciplina: 530.4/12
• Soggetti: Solids - Magnetic properties
• Lingua di pubblicazione: Inglese
• Formato: Materiale a stampa
• Livello bibliografico: Monografia
• Note generali: Description based upon print version of record.
• Nota di bibliografia: Includes bibliographical references and index.
• Nota di contenuto: Intro -- MAGNETIC PROPERTIESOF SOLIDS -- CONTENTS -- PREFACE -- NON-EQUILIBRIUM MAGNETISMOF SINGLE-DOMAIN PARTICLESFOR CHARACTERIZATIONOF MAGNETIC NANOMATERIALS -- Abstract -- 1. Introduction -- 1.1. Real Magnetic Nanoparticles -- 1.2. Basic Properties of Idealized Stoner-Wohlfarth Particles -- 1.3. Néel's Relaxation Approach -- 2. The Stoner-Wohlfarth Model Extended within Néel'sRelaxation -- 2.1. The Extended SW Model: Hysteresis in a Periodic External MagneticField -- 2.2. Temperature Demagnetization Curves for Different Cooling Regimes -- 2.3. High-Temperature Magnetization Limit in the Extended SW Model -- 3. Multilevel Model for Stochastic Relaxationof Particle's Uniform Magnetization -- 3.1. Constant-Energy Magnetization Trajectories as Stochastic States -- 3.2. Non-Langevin High-Temperature Magnetizationin the Slow Diffusion Limit -- 3.3. Equilibrium Magnetization within an Effective Inclusion of Diffusion -- 4. Relaxation Mössbauer Spectra of Magnetic Nanoparticles -- 4.1. Mössbauer Spectra of Nanoparticles and Hyperfine Field Distribution -- 4.2. Two-Level Relaxation Model -- 4.3. Generalized Two-Level Relaxation Model -- 4.4. Mössbauer Spectra within Precession of the Hyperfine Field -- 4.5. Mössbauer Spectra of Nanoparticles within Continuous Diffusion andPrecession of Uniform Magnetization -- 4.6. Mössbauer Spectra of Nanoparticles in a Weak Magnetic Field -- 5. Mössbauer Spectra under Radiofrequency Magnetic FieldExcitation -- 5.1. Mössbauer Spectra under Rf Field Excitation within the Stoner-Wohlfarth Model -- 5.2. Relaxation Mössbauer Spectra under Rf Field Excitation -- 5.3. Mössbauer Spectra under Rf ; Field Excitation within the Extended SWModel -- 5.4. Relaxation-Stimulated Resonances in Mössbauer Spectra under Rf FieldExcitation -- 6. Conclusion -- Acknowledgments -- References.; MAGNETIC AND ELECTRONIC STRUCTUREMODIFICATIONS INDUCED BY SURFACESEGREGATION IN LA0.65PB0.35MNO3 THIN FILMS -- Abstract -- 1. Introduction -- 2. Thin Film Deposition -- 3. Bulk Properties of the Thin Films -- 4. Surface Composition -- 5. Surface Debye Temperature -- 6. Surface Electronic Structure -- 7. Summary -- References -- SITE DISORDER AND FINITE SIZE EFFECTSIN RARE-EARTH MANGANITES -- Abstract -- I. Introduction -- 1.1. Outline of Manganites -- 1.2. Disorder Effect -- 1.3. Finite Size Effect -- II. A-Site Disorder Effects -- 2.1. Early Studies on the A-Site Disorder -- 2.2. Large Bandwidth Manganites -- 2.2. Large Bandwidth Manganites -- 2.3. Intermediate Bandwidth Manganites -- 2.4. Small Bandwidth Manganites -- III. B-Site Disorder Effects -- 3.1. Introduction -- 3.2. Theoretical Model -- 3.3. Results and Discussion -- IV. Finite Size Effects in Nanostructure Manganites -- 4.1. Experimental Results -- 4.2. Theoretical Approach -- V. Conclusion -- Acknowledgements -- Refernences -- PROCESSING AND PROPERTIESOF THIN MANGANITE FILMS -- Abstract -- Introduction -- 1. Processing of Thin Manganite Films -- 2. Morphology and Crystalline Quality of La0.7Ca0.3MnO3 ThinFilms -- 2.1. Studies of the Growth Parameters -- 2.2. Microstructure of La0.7Ca0.3MnO3 Epitaxial Thin Films -- 2.3. Oxygen Vacancies in Manganite Thin Films -- 3. Fe DOPED La0.7Ca0.3Mn1-xFexO3 (x=0.2) Thin Films -- 3.1. Structural, Composition and Electronic Characterizationof La0.7Ca0.3Mn0.8Fe0.2O3 Films -- 3.2. Electronic Properties of the Fe (20%) Doped La0.7Ca0.3Mn1-xFexO3 ThinFilms -- Conclusion -- Acknowledgments -- References -- STUDY OF THE MAGNETIC PROPERTIES OF THESEMICONDUCTORS AND THE NANOMATERIALSBY DIFFERENT THEORETICAL METHODS -- Abstract -- I. Introduction -- II. Theoretical Methods -- II.1. Mean Field Theory -- II.2. Probability Law.; II.3. High Temperature Series Expansions (Quantum Method) -- II.4. High-Temperature Series Expansions (Classical Method) -- III. Applications for Different SemiconductorsMagnetic Materials -- III. 1. Semiconductors Spinels Material -- III.1.A. Mean Field Theory and Probability Law -- III.1.B. High Temperature Series Expansions -- III.1.C. Replica Method -- III. 2. Diluted Magnetic Semiconductors (DMS) -- III.3. Illuminates and Perovskites Materials -- III.4. Magnetic Properties and Finite Size Scaling in Nanomaterials -- IV. Discussions and Conclusions -- Annex 1 -- I. Calculation of the Coefficients a (n) -- II. Calculation of the Coefficients e (k) and d (k), for k = 1,2 -- Annex 2 -- References -- FAST DOMAIN WALL DYNAMICSIN THIN MAGNETIC WIRES (REVIEW) -- Abstract -- Introduction -- Theory of Domain Wall Propagation -- Amorphous Glass-Coated Microwires -- Single Domain Wall Propagation in AmorphousGlass- Coated Microwires -- Fast Domain Wall Propagation in Amorphous Glass CoatedMicrowires -- Acknowledgment -- References -- SUBSTITUTION- INDUCED STRUCTURAL,FERROELECTRIC AND MAGNETIC PHASETRANSITIONS IN BI1-XGDXFEO3 MULTIFERROICS -- Abstract -- 1. Introduction -- 2. Experimental -- 3. Results and Discussion -- 3.1. Crystal Structure -- 3.2. Local Ferroelectric Properties -- 3.3. Magnetic Properties -- 4. Conclusion -- Acknowledgements -- References -- PINNING EFFECT ON LOCAL MAGNETIZATIONIN FERRIMAGNETS A2FEMOO6 (A = BA, CA)EXAMINED BY TRANSMISSION ELECTRONMICROSCOPY (TEM) -- Abstract -- 1. Introduction -- Scope of this Paper -- 2. Experimental -- 3. Magnetic Domain Structure in Ba2FeMoO6 -- 4.Temperature Dependence of Maze-Shaped Magnetic Domains -- 5. Antisite Defects ; in Ba2FeMoO6 -- 6. Relationship between Magnetic Structure and Antisite Defects -- 7. Microstructure and Magnetic Domain Structure in Ca2FeMoO6 -- 8. Summary -- Acknowledgments.; Appendix -- A. Argon Ion Beam Thinning Method -- B. Focused Ion Beam Fabrication Method -- C. Selected-Area Electron Diffraction (SAED) Patterns -- D. Dark-Field Imaging -- E. High-Resolution Electron Microscopy -- F. Lorentz Transmission Electron Microscopy -- G. Magnetic Transport-of-Intensity Equation Method -- References -- OBTAINING MAGNETIC AND ELECTRICINFORMATION ON ORGANIC SYSTEMS USINGELECTRON SPIN RESONANCE -- Abstract -- Introduction -- Identifying Correlated Magnetic Moments -- ESR Lineshapes in Conducting Systems -- Conclusions -- Acknowledgments -- References -- ORBITAL DILUTION EFFECT IN MOTTINSULATING SYSTEM -- Abstract -- 1. Introduction -- 2. Impurity Effect in eg Orbital System -- 3. Impurity Effect in Spin-Orbital Coupled System -- 4. Impurity Effect in Quantum Orbital System -- 5. Conclusion -- References -- INDEX.
• Sommario/riassunto: Magnetism is one of the phenomena by which materials exert attractive or repulsive forces on other materials. This book presents a broad range of topics in this growing field, including their use as magnetic agents, receptor particles for microwaves, and more.