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1. |
Record Nr. |
UNINA9910317810603321 |
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Autore |
Dębska-Ślizień Maria Alicja |
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Titolo |
Urinary tract infection : the result of the strength of the pathogen, or the weakness of the host / / edited by Tomas Jarzembowski and Agnieszka Daca |
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Pubbl/distr/stampa |
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IntechOpen, 2018 |
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London, England : , : IntechOpen, , [2018] |
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©2018 |
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ISBN |
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1-83881-304-7 |
1-78923-375-5 |
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Descrizione fisica |
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1 online resource (126 pages) : illustrations |
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Disciplina |
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Soggetti |
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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. |
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Sommario/riassunto |
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Urinary tract infection (UTI) is a problem so common and so significant in routine clinical practice that accurate diagnostics are especially important. In particular, complicated UTI is associated with an increased rate of therapy failures, as a result of possible biofilm formation on foreign elements and antibiotic resistance, as well as the increased possibility of an infection recurrence. These are the arguments for the constant search for novel diagnostic tools and techniques. These and many other vital topics regarding UTI complications, management, and treatment, in addition to antibiotic resistance and bacterial virulence traits allowing us to mitigate or avoid antibiotic action, are presented in this book. |
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2. |
Record Nr. |
UNINA9910830952303321 |
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Autore |
Arrillaga J |
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Titolo |
Flexible power transmission [[electronic resource] ] : the HVDC options / / J. Arrillaga, Y.H. Liu, N.R. Watson |
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Pubbl/distr/stampa |
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Chichester, England ; ; Hoboken, NJ, : John Wiley, c2007 |
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ISBN |
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1-280-97398-6 |
9786610973989 |
0-470-51186-9 |
0-470-51185-0 |
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Descrizione fisica |
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1 online resource (376 p.) |
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Altri autori (Persone) |
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Disciplina |
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Soggetti |
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Electric power transmission |
Electric power distribution |
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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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Flexible Power Transmission The HVDC Options; Contents; Preface; 1 Introduction; 1.1 The Conventional Power Grid; 1.1.1 Power Transfer Mechanism; 1.2 Towards a More Flexible Power Grid; 1.2.1 Power Electronics Control; 1.3 HVDC Transmission; 1.3.1 Thyristor-Based CSC Transmission; 1.3.2 VSC Transmission Based on the Integrated Gate Bipolar Transistor (IGBT); 1.3.3 Multi-terminal HVDC; 1.3.4 The Flexibility Concept Applied to HVDC; 1.4 Relative Power Carrying Capability of AC and DC Transmission Lines; 1.5 The Impact of Distributed Generation; 1.6 The Effect of Electricity Deregulation |
1.7 DiscussionReferences; 2 Semiconductor Power Devices; 2.1 Introduction; 2.2 Semiconductor Principles; 2.3 Power Semiconductor Elements; 2.3.1 The pn Rectifier; 2.3.2 The Transistor; 2.3.3 Metal-Oxide-Semiconductor Field-Effect Transistor; 2.4 Dynamic Stresses on Power Switches; 2.4.1 Rate of Change of Voltage dv/dt; 2.4.2 Rate of Change of Current di/dt; 2.4.3 Balancing Problems in Series Chains; 2.5 Other Switching Issues; 2.5.1 Switching Frequency; 2.5.2 Switching Losses; 2.5.3 Soft Switching; 2.5.4 Use of Snubbers; 2.6 Thyristor-Type Power Switches; 2.6.1 The Thyristor |
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2.6.2 Gate Turn-Off Thyristor (GTO)2.6.3 Insulated Gate-Commutated Thyristor (IGCT); 2.6.4 MOS Turn-Off Thyrister (MTO); 2.6.5 MOS Controlled Thyrister (MCT); 2.6.6 Emitter Turn-Off Thyristor (ETO); 2.7 Insulated Gate Bipolar Transistor (IGBT); 2.7.1 IGBT (Series) Chains; 2.8 Diodes; 2.9 Prognostic Assessment; 2.9.1 Ratings and Applicability; 2.9.2 Relative Losses; References; 3 Line-Commutated HVDC Conversion; 3.1 Introduction; 3.2 Three-Phase AC-DC Conversion [1]; 3.2.1 Basic CSC Operating Principles; 3.2.2 Effect of Delaying the Firing Instant; 3.3 The Commutation Process |
3.3.1 Analysis of the Commutation Circuit3.4 Rectifier Operation; 3.5 Inverter Operation; 3.6 Power Factor and Reactive Power; 3.7 Characteristic Harmonics [3]; 3.7.1 DC Side Harmonics; 3.7.2 AC Side Harmonics; 3.8 Multi-Pulse Conversion; 3.8.1 Transformer Phase Shifting; 3.8.2 DC Ripple Reinjection [5]; 3.9 Uncharacteristic Harmonics and Interharmonics; 3.9.1 Imperfect AC Source; 3.9.2 DC Modulation; 3.9.3 Control System Imperfections; 3.9.4 Firing Asymmetry; 3.9.5 Magnification of Low-Order Harmonics; 3.10 Harmonic Reduction by Filters; 3.10.1 AC Side Filters; 3.10.2 DC Side Filters |
3.11 Frequency Cross-Modulation Across the LCC3.12 Summary; References; 4 Self-Commutating Conversion; 4.1 Introduction; 4.2 Voltage Source Conversion; 4.2.1 VSC Operating Principles; 4.2.2 Converter Components; 4.2.3 The Three-Phase VSC; 4.3 Comparison of LCC and VSC; 4.4 Current Source Conversion; 4.4.1 Analysis of the CSC Waveforms [2]; 4.5 The Reinjection Concept with Self-Commutation; 4.5.1 Application to VSC; 4.5.2 Application to CSC; 4.6 Discussion; References; 5 Pulse Width Modulation; 5.1 Introduction; 5.2 PWM Operating Principles; 5.3 Selective Harmonic Cancellation |
5.4 Sinusoidal (Carrier-Based) PWM |
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Sommario/riassunto |
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The development of power semiconductors with greater ratings and improved characteristics has meant that the power industry has become more willing to develop new converter configurations. These new configurations take advantage of the higher controllability and switching frequencies of the new devices. The next few years will decide which of the proposed technologies will dominate future power transmission systems. Flexible Power Transmission is a comprehensive guide to the high voltage direct current (HVDC) options available, helping the reader to make informed decisions for desi |
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