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Book
Manifestations of Cytomegalovirus Infection
Authors: --- ---
ISBN: 9535111167 9535171569 Year: 2013 Publisher: IntechOpen

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Abstract

Cytomegalovirus (CMV) is carried by 50 100% of the worlds population throughout their lives. Consequences are most readily seen in immunocompromised individuals such as organ transplant recipients, HIV-infected patients and new born infants. This book gives an in-depth view of manifestations of CMV infection in immunocompromised individuals: how it affects the immune system and how it is diagnosed and treated. The book also sheds light on the epidemiology and impact of CMV in sub-Saharan Africa, and also associations with age related disease that are more commonly seen in the western world. It particularly details a recent discovery between CMV and tumour immuno-biology. The book explores the development of a few compounds and also highlights the need to discover novel antiviral agents in future.


Book
Preventing Suicide in Patients with Mental Disorders
Authors: ---
Year: 2020 Publisher: Basel, Switzerland MDPI - Multidisciplinary Digital Publishing Institute

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Suicide is a complex phenomenon that is now considered understood as a neurodevelopmental condition encompassing childhood experiences as well as proximal conditions such as mental disorders and adverse life events. Individuals in crisis may face overwhelming psychological pain, which in some cases may overcome the threshold of each unique individual for whom suicide is considered the best option to deal with such pain. However, many socio-demographic, personal, or temperamental variables have been investigated for their causal association with suicide risk, but to date no single factor has clearly demonstrated an association with suicide. The mental disorders most frequently associated with suicide risk include bipolar disorders and major unipolar depression, substance use disorders and schizophrenia. However, anxiety, personality, eating, and trauma-related disorders, as well as organic mental disorders, also contribute to suicidal risk. Moreover, in modern society, the presence of social uncertainty, the changes in family models, the development of social media, and the loss of face-to-face interaction can have an impact on suicide risk, particularly in the younger generation.


Book
COVID-19: Current Challenges and Future Perspectives
Authors: --- ---
Year: 2022 Publisher: Basel MDPI - Multidisciplinary Digital Publishing Institute

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On March 11, 2020, the World Health Organization declared COVID-19 a global pandemic and the disease now affects nearly every country and region. Caused by SARS-CoV-2, COVID-19 presents significant challenges to health systems and public health in both hemispheres as well as to the economies of each country. The morbidity and mortality due to infections caused by SARS-CoV-2 have been significant despite the short duration since its discovery and initially overwhelmed many hospitals and clinics. It influences everyone, and countermeasures have been dramatic in their impact on employment, social systems, and mental health. This Special Issue provides an avenue for authors from various disciplines to provide feedback on our responses and preparedness to COVID-19 globally as well as to disseminate critical information about the SARS-CoV-2 virus and the associated COVID-19 pandemic. It consists of 22 peer-reviewed papers that cover worldwide perspectives encompasses the following: Original articles about COVID-19 (including epidemiology, modelling, clinical data, treatment, prevention, countermeasures, impacts on tropical regions, response, and preparedness);Original articles about SARS-CoV-2 (microbiology, virology, transmission, pathology, and vaccinology);Perspectives about COVID-19 and SARS-CoV-2 (comparisons with past coronavirus outbreaks, impactful local initiatives, novel responses, and commentaries);Reviews on COVID-19 (based on systematic and narrative reviews);and Innovations (vaccine development, drug trials, and original countermeasures).

Keywords

COVID-19 --- SARS-CoV-2 --- hepatitis B and C --- cirrhosis --- chronic kidney disease --- alcohol-related liver disease --- nonalcoholic steatohepatitis --- necrosis --- MDR-TB --- clinical trials --- IL-6 inhibitors --- tocilizumab --- cytokine release syndrome --- cytokine storm --- operational research --- health systems --- SORT IT --- pandemics --- training --- pandemic --- endemic --- tuberculosis --- impact --- control --- overview --- malaria --- preparedness --- Africa --- emergency --- fecal calprotectin --- bowel perforation --- D-Dimer --- thrombosis --- ischemia --- efficacy --- safety --- kaletra --- lopinavir/ritonavir --- meta-analysis --- coronavirus --- SARS-CoV-1 --- MERS --- SARS --- influenza --- healthcare worker --- healthcare personnel --- general practitioners --- medical doctor --- heart transplant --- CMV --- Chagas disease --- infection --- severity --- respiratory viruses --- coinfections --- health care workers --- Philippines --- rhinovirus --- severe acute respiratory syndrome coronavirus 2 --- plasmodium falciparum --- differential diagnosis --- cognitive bias --- diagnostic reasoning --- recurrence --- reinfection --- Bangladesh --- Kenya --- Nairobi --- presumptive tuberculosis --- TB treatment outcomes --- HIV --- antiretroviral therapy --- EpiCollect5 --- Malawi --- Lilongwe --- Zimbabwe --- Harare --- real-time operational research --- ethics --- research capacity building --- India --- Nepal --- post-acute COVID-19 syndrome --- COVID-19 vaccines --- mortality --- epidemiology --- public health --- healthcare workers --- attitudes --- perceptions --- knowledge --- n/a


Book
Multilevel Converters : Analysis, Modulation, Topologies, and Applications
Authors: ---
ISBN: 3039214829 3039214810 9783039214822 Year: 2019 Publisher: Basel, Switzerland : MDPI,

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This book is a collection of scientific papers concerning multilevel inverters examined from different points of view. Many applications are considered, such as renewable energy interface, power conditioning systems, electric drives, and chargers for electric vehicles. Different topologies have been examined in both new configurations and well-established structures, introducing novel and particular modulation strategies, and examining the effect of modulation techniques on voltage and current harmonics and the total harmonic distortion.

Keywords

total harmonic distortion (THD) --- imperialist competitive algorithm --- fault detection --- automatic current balance --- small signal modeling --- phase-shifted PWM --- voltage balance control --- parasitic switching states --- multi-terminal DC network (MTDC) --- DC-link capacitor voltage balancing --- high efficiency drive --- modular multilevel converters --- DC-link voltage balancing --- power factor correction --- selected harmonic elimination --- Continuous Wavelet Transform --- power flow analysis --- T-type inverter --- electrical drives --- modular multilevel converter (MMC) --- computational cost --- fault location --- voltage imbalance --- DC-link capacitor design --- multilevel active-clamped converter --- dc-link capacitor voltage balance --- voltage ripple --- commutation --- model predictive control (MPC) --- voltage fluctuation --- multi-motor drive --- Balance of capacitor voltage --- on-board battery charger --- single-phase three-level NPC converter --- Suppression of CMV --- redundant switching combination --- ACTPSS --- model predictive control --- three-loop --- finite control set model predictive control --- current estimation --- five-level --- fault-tolerant control --- offset voltage injection --- harmonic component --- current unmeasurable areas --- LC filter --- computational burden --- interleaved buck --- three-level converter --- IGBT short-circuit --- SVPWM --- harmonic --- DC side fault blocking --- three-phase to single-phase cascaded converter --- single shunt resistor --- buck-chopper --- power factor --- modulation techniques --- modular multilevel converters (MMC) --- permanent magnet synchronous generator --- sorting networks --- alternating current (AC) motor drive --- space vector pulse width modulation (SVPWM) --- open end winding motor --- minimum voltage injection (MVI) method --- transmission line --- shift method --- genetic algorithm --- electric vehicle --- active filter --- NPC/H Bridge --- battery energy storage system (BESS) --- digital controller --- neutral-point-clamped (NPC) inverter --- motor drive --- hybrid modulated model predictive control --- level-shifted PWM --- optimal output voltage level --- Phase Disposition PWM --- open-end winding configuration --- modular multilevel converter --- multilevel power converters --- simplified PWM strategy --- MMC-MTDC --- tolerance for battery power unbalance --- three-level neutral point clamped inverter (NPCI) --- real time simulator --- harmonic mitigation --- reverse prediction --- multilevel inverters --- field-programmable gate array --- current reconstruction method --- digital signal processors (DSP) --- three-level boost --- multilevel converter --- improved PQ algorithm --- low-harmonic DC ice-melting device --- PV-simulator --- total harmonic distortion --- voltage balancing --- Sub-module (SM) fault --- DC–DC conversion --- smart grid --- Cascaded H-bridge multilevel inverter (CHBMI) --- dynamic reactive --- field-oriented control --- capacitor voltage balancing --- energy saving --- high reliability applications --- three-phase inverter --- substation’s voltage stability --- three-level boost DC-DC converter --- power quality --- T-type converter --- voltage source inverter --- state-of-charge (SOC) balancing control --- multi-point DC control --- predictive control --- Differential Comparison Low-Voltage Detection Method (DCLVDM)


Book
Advances in Rotating Electric Machines
Author:
Year: 2020 Publisher: Basel, Switzerland MDPI - Multidisciplinary Digital Publishing Institute

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Abstract

It is difficult to imagine a modern society without rotating electric machines. Their use has been increasing not only in the traditional fields of application but also in more contemporary fields, including renewable energy conversion systems, electric aircraft, aerospace, electric vehicles, unmanned propulsion systems, robotics, etc. This has contributed to advances in the materials, design methodologies, modeling tools, and manufacturing processes of current electric machines, which are characterized by high compactness, low weight, high power density, high torque density, and high reliability. On the other hand, the growing use of electric machines and drives in more critical applications has pushed forward the research in the area of condition monitoring and fault tolerance, leading to the development of more reliable diagnostic techniques and more fault-tolerant machines. This book presents and disseminates the most recent advances related to the theory, design, modeling, application, control, and condition monitoring of all types of rotating electric machines.

Keywords

core saturation --- cross-coupling inductance --- wound synchronous machines (WSM) --- signal injection --- position sensorless --- high-frequency model --- hybrid permanent magnet --- interior permanent magnet (IPM) machine --- magnet-axis-shifted --- reluctance torque --- Sensorless --- induction motors --- H_infinity --- drives --- vector control --- experimental implementation --- direct torque control --- duty cycle control --- harmonic currents --- six-phase induction motor --- torque ripple --- interior permanent magnet synchronous motor (IPMSM) --- sensorless control --- adaptive algorithm --- super-twisting sliding mode observer (STO) --- phase-locked loop (PLL) --- permanent-magnet vernier machine --- in-wheel direct-drive --- outer rotor --- overhang --- soft magnetic composite --- reaction sphere --- spherical motor --- structural design --- torque density optimization --- support vector machines --- finite element method --- induction motor --- smart-sensor --- stray flux --- time-frequency transforms --- wavelet entropy --- harmonic modeling method --- magnetic-geared machine --- hybrid electric vehicle --- magnetic field --- electromagnetic performance --- analytical modeling --- brushless DC motor --- commutation torque ripple --- back electromotive force --- multiphase machines --- fault-tolerance --- dual-channel --- brushless direct current motor with permanent magnet (BLDCM) --- switched reluctance motor (SRM) --- active flux --- stator flux observation --- super-twisting sliding-mode stator flux observer (STSMFO) --- deep-bar effect --- mathematical model --- estimation --- motor drives --- direct torque control (DTC) --- permanent magnet synchronous motor (PMSM) --- maximum torque per ampere (MTPA) operation --- DTC with space-vector modulation (DTC-SVM) --- AFPMSM --- analytical algorithm --- vibration noise --- temperature field analysis --- SynRM --- irreversible demagnetization --- PMa-SynRM --- flux intensifying --- deadbeat current control --- PMSM servo motor drives --- auto tuning --- parameter identification --- periodic controller --- surface permanent magnet synchronous motor --- fault-tolerant system --- multi-channel --- quad-channel operation (QCO) --- triple-channel operation (TCO) --- dual-channel operation (DCO) --- single-channel operation (SCO) --- permanent magnet brushless direct current motor --- BLDCM --- double Fourier analysis --- current spectrum decomposition --- eddy current loss --- permanent magnet machine design --- cogging torque --- permanent magnet machine --- uneven magnets --- IPMSM --- uncertainty and disturbance estimator --- flux-weakening control --- double-cage induction motor --- improvement of motor reliability --- cage winding constructions --- direct start-up --- coupled electromagnetic-thermal model --- outer rotor inductor --- electric vehicle --- high-efficiency --- eco-friendly --- automation --- finite element analysis --- PMSM --- DOE --- optimization --- metamodeling --- adaptive robust control --- energy feedback --- particle swarm optimization --- torque optimal distribution method --- multiphase electric drives --- six-phase machines --- finite control set model predictive control --- predictive current control --- predictive torque control --- high frequency square-wave voltage --- interior permanent-magnet synchronous motor (IPMSM) --- magnetic polarity detection --- rotor position estimation --- characteristics analysis --- fault detection --- stator fault --- rotor fault --- torque estimation --- finite control set mode predictive control --- duty cycle --- maximum torque per ampere --- permanent magnet synchronous motor --- acoustics --- boundary element method --- electric machines --- magneto-mechanics --- modeling --- noise --- vibro-acoustics --- efficiency --- line-start synchronous reluctance motor --- permanent magnet --- power factor --- multiphase --- induction --- motor --- space harmonics --- time harmonics --- injection --- high-speed permanent synchronous motor --- magnetic field characteristic --- iron loss --- stator structure --- online parameters estimation --- permanent magnet synchronous machines --- synchronous reluctance machines --- high frequency signal injection --- CMV --- modulation techniques --- PWM --- railway traction drives --- induction motor drives --- high-speed drives --- overmodulation and six-step operation --- electrical motors --- sot filling factor --- optimization algorithm --- windings --- magnetic wire --- filling factor optimization --- electric drive --- transmission shaft --- electric transmission line --- electrical and mechanical similarities --- kinematic structure --- equivalent circuit --- mathematical modelling --- failure --- detection --- diagnosis --- BLDC --- brushless --- systematic review --- rotor position --- BLDC motor --- sensor misalignment --- sizing methodology --- electrical machines --- thermal model --- electromagnetic model --- switched reluctance motor --- torque sharing functions --- firing angle modulation --- autonomous systems --- brushless synchronous generator --- electric power generation --- high speed generator --- high resistance connection --- fault-detection --- fault-tolerant control --- six-phase permanent magnet synchronous machines --- field-oriented control


Book
Advances in Rotating Electric Machines : Volume 2
Author:
Year: 2020 Publisher: Basel, Switzerland MDPI - Multidisciplinary Digital Publishing Institute

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Abstract

It is difficult to imagine a modern society without rotating electric machines. Their use has been increasing not only in the traditional fields of application but also in more contemporary fields, including renewable energy conversion systems, electric aircraft, aerospace, electric vehicles, unmanned propulsion systems, robotics, etc. This has contributed to advances in the materials, design methodologies, modeling tools, and manufacturing processes of current electric machines, which are characterized by high compactness, low weight, high power density, high torque density, and high reliability. On the other hand, the growing use of electric machines and drives in more critical applications has pushed forward the research in the area of condition monitoring and fault tolerance, leading to the development of more reliable diagnostic techniques and more fault-tolerant machines. This book presents and disseminates the most recent advances related to the theory, design, modeling, application, control, and condition monitoring of all types of rotating electric machines.

Keywords

core saturation --- cross-coupling inductance --- wound synchronous machines (WSM) --- signal injection --- position sensorless --- high-frequency model --- hybrid permanent magnet --- interior permanent magnet (IPM) machine --- magnet-axis-shifted --- reluctance torque --- Sensorless --- induction motors --- H_infinity --- drives --- vector control --- experimental implementation --- direct torque control --- duty cycle control --- harmonic currents --- six-phase induction motor --- torque ripple --- interior permanent magnet synchronous motor (IPMSM) --- sensorless control --- adaptive algorithm --- super-twisting sliding mode observer (STO) --- phase-locked loop (PLL) --- permanent-magnet vernier machine --- in-wheel direct-drive --- outer rotor --- overhang --- soft magnetic composite --- reaction sphere --- spherical motor --- structural design --- torque density optimization --- support vector machines --- finite element method --- induction motor --- smart-sensor --- stray flux --- time-frequency transforms --- wavelet entropy --- harmonic modeling method --- magnetic-geared machine --- hybrid electric vehicle --- magnetic field --- electromagnetic performance --- analytical modeling --- brushless DC motor --- commutation torque ripple --- back electromotive force --- multiphase machines --- fault-tolerance --- dual-channel --- brushless direct current motor with permanent magnet (BLDCM) --- switched reluctance motor (SRM) --- active flux --- stator flux observation --- super-twisting sliding-mode stator flux observer (STSMFO) --- deep-bar effect --- mathematical model --- estimation --- motor drives --- direct torque control (DTC) --- permanent magnet synchronous motor (PMSM) --- maximum torque per ampere (MTPA) operation --- DTC with space-vector modulation (DTC-SVM) --- AFPMSM --- analytical algorithm --- vibration noise --- temperature field analysis --- SynRM --- irreversible demagnetization --- PMa-SynRM --- flux intensifying --- deadbeat current control --- PMSM servo motor drives --- auto tuning --- parameter identification --- periodic controller --- surface permanent magnet synchronous motor --- fault-tolerant system --- multi-channel --- quad-channel operation (QCO) --- triple-channel operation (TCO) --- dual-channel operation (DCO) --- single-channel operation (SCO) --- permanent magnet brushless direct current motor --- BLDCM --- double Fourier analysis --- current spectrum decomposition --- eddy current loss --- permanent magnet machine design --- cogging torque --- permanent magnet machine --- uneven magnets --- IPMSM --- uncertainty and disturbance estimator --- flux-weakening control --- double-cage induction motor --- improvement of motor reliability --- cage winding constructions --- direct start-up --- coupled electromagnetic-thermal model --- outer rotor inductor --- electric vehicle --- high-efficiency --- eco-friendly --- automation --- finite element analysis --- PMSM --- DOE --- optimization --- metamodeling --- adaptive robust control --- energy feedback --- particle swarm optimization --- torque optimal distribution method --- multiphase electric drives --- six-phase machines --- finite control set model predictive control --- predictive current control --- predictive torque control --- high frequency square-wave voltage --- interior permanent-magnet synchronous motor (IPMSM) --- magnetic polarity detection --- rotor position estimation --- characteristics analysis --- fault detection --- stator fault --- rotor fault --- torque estimation --- finite control set mode predictive control --- duty cycle --- maximum torque per ampere --- permanent magnet synchronous motor --- acoustics --- boundary element method --- electric machines --- magneto-mechanics --- modeling --- noise --- vibro-acoustics --- efficiency --- line-start synchronous reluctance motor --- permanent magnet --- power factor --- multiphase --- induction --- motor --- space harmonics --- time harmonics --- injection --- high-speed permanent synchronous motor --- magnetic field characteristic --- iron loss --- stator structure --- online parameters estimation --- permanent magnet synchronous machines --- synchronous reluctance machines --- high frequency signal injection --- CMV --- modulation techniques --- PWM --- railway traction drives --- induction motor drives --- high-speed drives --- overmodulation and six-step operation --- electrical motors --- sot filling factor --- optimization algorithm --- windings --- magnetic wire --- filling factor optimization --- electric drive --- transmission shaft --- electric transmission line --- electrical and mechanical similarities --- kinematic structure --- equivalent circuit --- mathematical modelling --- failure --- detection --- diagnosis --- BLDC --- brushless --- systematic review --- rotor position --- BLDC motor --- sensor misalignment --- sizing methodology --- electrical machines --- thermal model --- electromagnetic model --- switched reluctance motor --- torque sharing functions --- firing angle modulation --- autonomous systems --- brushless synchronous generator --- electric power generation --- high speed generator --- high resistance connection --- fault-detection --- fault-tolerant control --- six-phase permanent magnet synchronous machines --- field-oriented control

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