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1. |
Record Nr. |
UNINA9910818794003321 |
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Autore |
Sakho Ibrahima |
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Titolo |
Screening constant by unit nuclear charge method : description and application to the photoionization of atomic systems / / Ibrahima Sakho |
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Pubbl/distr/stampa |
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London, England ; ; Hoboken, New Jersey : , : ISTE : , : Wiley, , 2018 |
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©2018 |
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ISBN |
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1-119-51041-4 |
1-119-47694-1 |
1-119-51042-2 |
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Descrizione fisica |
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1 online resource (406 pages) : illustrations (some color) |
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Collana |
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Disciplina |
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Soggetti |
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Photoionization |
Collisions (Nuclear physics) |
Polarization (Nuclear physics) |
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Lingua di pubblicazione |
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Formato |
Materiale a stampa |
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Livello bibliografico |
Monografia |
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Nota di bibliografia |
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Includes bibliographical references and index. |
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Nota di contenuto |
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Part 1: Different photoionization processes, rydberg series -- Experimental and theoretical methods of photoionization -- General formalism of the screening constant by unit nuclear charge method applied to photoionization -- Part 2. Applications in the calculations of energies and natural widths of the resonance states of multi-electron atomic systems: Application to the calculation of energies of two-electron atomic systems (helium-like systems) -- Calculating the energies of three-electron atomic systems (lithium-like systems) -- Application in the resonant photoionization of atomic systems of atomic numbers z = 4-12 -- Resonant photoionization of sulfur (S) and Ar+, Se²+ and Kr+ ions. |
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"Experimental studies on the photoionization of atomic systems have been further developed by the launch of satellites observing astrophysical plasmas (Chandra and XMM Newton, for example). However, one of the challenges inherent to these studies is the very low density of target ions and thus low count rates. In order to compensate for this, excessively long acquisition times are required which are often |
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incompatible with the experiment times possible in synchrotron radiation centers. It has therefore become necessary, before the experiments, to attain the most precise estimation possible of photon energies in order to research photoexcitation responses. This is where the Screening Constant by Unit Nuclear Charge method shows its strength. Thanks to an extremely simple formalism, it quickly and precisely provides the position of excitation resonances as well as their width. This book offers a clear explanation of the Screening Constant by Unit Nuclear Charge method and explores its application to numerous domains of physics related to atomic spectroscopy. Various exercises are proposed in the book for the calculations of resonance energies and widths of Rydberg series for he-like systems, Li-like systems, Be-like systems, B-like systems and for more complex atomic systems such as sulfur, argon, selenium and Kr"--Page 4 of cover |
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2. |
Record Nr. |
UNINA9911018830303321 |
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Titolo |
Modern drying technology . Volume 1 Computational tools at differents cales / / edited by Evangelos Tsotsas and Arun S. Mujumdar |
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Pubbl/distr/stampa |
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Weinheim, : Wiley-VCH, c2007 |
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ISBN |
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9786613370433 |
9781283370431 |
1283370433 |
9783527631636 |
3527631631 |
9783527631629 |
3527631623 |
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Descrizione fisica |
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1 online resource (360 p.) |
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Collana |
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Altri autori (Persone) |
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TsotsasEvangelos |
MujumdarArun S |
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Disciplina |
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Soggetti |
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Drying |
Chemistry, Technical |
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Lingua di pubblicazione |
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Formato |
Materiale a stampa |
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Livello bibliografico |
Monografia |
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Note generali |
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Description based upon print version of record. |
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Nota di bibliografia |
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Includes bibliographical references and index. |
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Nota di contenuto |
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Modern Drying Technology Volume- 1; Contents; Series Preface; Preface of Volume 1; List of Contributors; Recommended Notation; EFCE Working Party on Drying: Address List; 1 Comprehensive Drying Models based on Volume Averaging: Background, Application and Perspective; 1.1 Microscopic Foundations of the Macroscopic Formulation; 1.2 The Macroscopic Set of Equations; 1.3 Physical Phenomena Embedded in the Equations; 1.3.1 Low-temperature Convective Drying; 1.3.1.1 The Constant Drying Rate Period; 1.3.1.2 The Decreasing Drying Rate Period |
1.3.2 Drying at High Temperature: The Effect of Internal Pressure on Mass Transfer1.4 Computational Strategy to Solve the Comprehensive Set of Macroscopic Equations; 1.4.1 The Control-volume Finite-element (CV-FE) Discretization Procedure; 1.4.2 Evaluation of the Tensor Terms at the CV Face; 1.4.3 Solution of the Nonlinear System; 1.4.3.1 Outer (Nonlinear) Iterations; 1.4.3.2 Construction of the Jacobian; 1.4.3.3 Inner (Linearized System) Iterations; 1.5 Possibilities Offered by this Modeling Approach: Convective Drying; 1.5.1 High-temperature Convective Drying of Light Concrete |
1.5.1.1 Test 1: Superheated Steam1.5.1.2 Tests 2 and 3: Moist Air, Soft and Severe Conditions; 1.5.2 Typical Drying Behavior of Softwood: Difference Between Sapwood and Heartwood; 1.6 Possibilities Offered by this Modeling Approach: Less-common Drying Configurations; 1.6.1 Drying with Volumetric Heating; 1.6.2 The Concept of Identity Drying Card (IDC); 1.6.3 Drying of Highly Deformable Materials; 1.7 Homogenization as a Way to Supply the Code with Physical Parameters; 1.8 The Multiscale Approach; 1.8.1 Limitations of the Macroscopic Formulation |
1.8.2 The Stack Model: An Example of Multiscale Model1.8.2.1 Global Scale; 1.8.2.2 Local Scale; 1.8.2.3 Coupling Approach; 1.8.2.4 Samples Simulations; 1.8.2.5 Accounting for Wood Variability; 1.8.2.6 Accounting for Drying Quality; Conclusion; 2 Pore-network Models: A Powerful Tool to Study Drying at the Pore Level and Understand the Influence of Structure on Drying Kinetics; 2.1 Introduction; 2.2 Isothermal Drying Model; 2.2.1 Model Description; 2.2.1.1 Network Geometry and Corresponding Data Structures; 2.2.1.2 Boundary-layer Modeling; 2.2.1.3 Saturation of Pores and Throats |
2.2.1.4 Vapor Transfer2.2.1.5 Capillary Pumping of Liquid; 2.2.1.6 Cluster Labeling; 2.2.1.7 Drying Algorithm; 2.2.2 Simulation Results and Experimental Validation; 2.2.3 Gravity and Liquid Viscosity - Stabilized Drying Front; 2.2.3.1 Modeling Gravity; 2.2.3.2 Modeling Liquid Viscosity; 2.2.3.3 Dimensionless Numbers and Length Scales; 2.2.3.4 Phase Distributions and Drying Curves; 2.2.4 Film Flow; 2.2.5 Wettability Effects; 2.2.6 First Drying Period; 2.3 Model Extensions; 2.3.1 Heat Transfer; 2.3.2 Multicomponent Liquid; 2.4 Influence of Pore Structure; 2.4.1 Pore Shapes |
2.4.2 Coordination Number |
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Sommario/riassunto |
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This five-volume handbook provides a comprehensive overview of all important aspects of modern drying technology, including only advanced results. Volume 1 deals with computational tools at different scales, including homogenized, pore network and continuous thermo-mechanical models, computational fluid dynamics and population balances, as well as process systems simulation tools. High-level, cutting-edge results on a mandatory industrial process. |
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3. |
Record Nr. |
UNINA9910585939303321 |
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Autore |
Amato Massimo |
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Titolo |
The State of the Art in Endodontics |
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Pubbl/distr/stampa |
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Basel, : MDPI - Multidisciplinary Digital Publishing Institute, 2022 |
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Descrizione fisica |
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1 online resource (236 p.) |
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Soggetti |
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Public health and preventive medicine |
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Lingua di pubblicazione |
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Formato |
Materiale a stampa |
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Livello bibliografico |
Monografia |
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Sommario/riassunto |
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Nowadays, we use the term "modern endodontics" thanks to new technologies, novel materials, and revolutionary techniques. Various equipment is available to facilitate and improve our endodontic treatments, such as operating microscopes, ultrasounds, lasers, modern alloys for rotary files, powerful irrigation systems, new materials for filling root canals, 3D radiology, and several more. With the aid of the previously mentioned advances, complex endodontic treatments can be carried out safely, hence guaranteeing patients a high level of care and, above all, saving teeth that would otherwise be doomed for extraction. General practitioners and, even more importantly, specialists in endodontics should implement these modern technologies in their practice. This Special Issue will focus on modern endodontics regarding all the recent updates. Full papers of original articles, short communications, and review articles are all invited. |
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