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Books on the topic 'Magnet losse'

Author: Grafiati

Published: 1 April 2023

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1

E, Schwarze Gene, and NASA Glenn Research Center, eds. Wide temperature core loss characteristics of transverse magnetically annealed amorphous tapes for high frequency aerospace magnetics. [Cleveland, Ohio]: National Aeronautics and Space Administration, Glenn Research Center, 1999.

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2

Center, NASA Glenn Research, ed. Comparative wide temperature core loss characteristics of two candidate ferrites for the NASA/TRW 1500 W PEBB converter. [Cleveland, Ohio]: National Aeronautics and Space Administration, Glenn Research Center, 1999.

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3

Hill, David A. Near-field and far-field excitation of a long conductor in a lossy medium. Boulder, Colo: Electromagnetic Fields Division, Center for Electronics and Electrical Engineering, National Engineering Laboratory, National Institute of Standards and Technology, 1990.

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4

Hill, David A. Near-field and far-field excitation of a long conductor in a lossy medium. Boulder, Colo: Electromagnetic Fields Division, Center for Electronics and Electrical Engineering, National Engineering Laboratory, National Institute of Standards and Technology, 1990.

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5

Hill, David A. Near-field and far-field excitation of a long conductor in a lossy medium. Boulder, Colo: Electromagnetic Fields Division, Center for Electronics and Electrical Engineering, National Engineering Laboratory, National Institute of Standards and Technology, 1990.

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6

Hill, David A. Near-field and far-field excitation of a long conductor in a lossy medium. Boulder, Colo: Electromagnetic Fields Division, Center for Electronics and Electrical Engineering, National Engineering Laboratory, National Institute of Standards and Technology, 1990.

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7

Hill, David A. Near-field and far-field excitation of a long conductor in a lossy medium. Boulder, Colo: Electromagnetic Fields Division, Center for Electronics and Electrical Engineering, National Engineering Laboratory, National Institute of Standards and Technology, 1990.

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8

E, Schwarze Gene, Niedra Janis M, and United States. National Aeronautics and Space Administration., eds. Comparison of high temperature, high frequency core loss and dynamic B-H loops of a 2v-49Fe-49Co and a grain oriented 3Si-Fe alloy. [Washington, DC]: National Aeronautics and Space Administration, 1991.

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9

E, Schwarze G., Niedra J. M, and United States. National Aeronautics and Space Administration., eds. Comparison of high temperature, high frequency core loss and dynamic B-H loops of a 2v-49Fe-49Co and a grain oriented 3Si-Fe alloy. [Washington, DC]: National Aeronautics and Space Administration, 1991.

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10

E, Schwarze Gene, Niefra J. M, and United States. National Aeronautics and Space Administration., eds. Comparison of high temperature, high frequency core loss and dynamic B-H loops of two 50 Ni-Fe crystalline alloys and an iron-based amorphous alloy. [Washington, DC]: National Aeronautics and Space Administration, 1991.

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11

Wieserman, W. R. High frequency, high temperature specific core loss and dynamic B-H hysteresis loop characteristics of soft magnetic alloys. [Washington, D.C.]: NASA, 1990.

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12

R, Wieserman William, Niedra Janis M, and United States. National Aeronautics and Space Administration., eds. Effects of temperature, frequency, flux density, and excitation waveform on the core loss and dynamic B-H loops of supermalloy. [Washington, DC]: National Aeronautics and Space Administration, 1995.

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13

S, Gerber Scott, and United States. National Aeronautics and Space Administration., eds. Improved L-C resonant decay technique for Q measurement of quasilinear power inductors: New results for MPP and ferrite powdered cores. [Washington, D.C.]: National Aeronautics and Space Administration, 1995.

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14

S, Gerber Scott, and United States. National Aeronautics and Space Administration., eds. Improved L-C resonant decay technique for Q measurement of quasilinear power inductors: New results for MPP and ferrite powdered cores. [Washington, D.C.]: National Aeronautics and Space Administration, 1995.

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15

S, Gerber Scott, and United States. National Aeronautics and Space Administration., eds. Improved L-C resonant decay technique for Q measurement of quasilinear power inductors: New results for MPP and ferrite powdered cores. [Washington, D.C.]: National Aeronautics and Space Administration, 1995.

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16

A, Balona Luis, Henrichs Huib F, and Medupe Rodney, eds. International Conference on Magnetic Fields in O, B and A Stars: Origin and connection to pulsation, rotation and mass loss : proceedings of a conference held at University of North-West, Mmabatho, South Africa, 27 November - 1 December, 2002. San Francisco, California: Astronomical Society of the Pacific, 2003.

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17

D, Schiff Nicholas, Laureys Steven, and Association for Research in Nervous and Mental Disease. Meeting, eds. Disorders of consciousness. Boston: Wiley-Blackwell, 2009.

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18

Mi, Chunting. Modelling of iron losses of permanent magnet synchronous motors. 2001.

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19

Vaez-Zadeh, Sadegh. Vector Control. Oxford University Press, 2018. http://dx.doi.org/10.1093/oso/9780198742968.003.0003.

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The chapter begins with a description of the scalar control of PMS motors. The fundamentals of PMS motor vector control (VC) are then presented with an eye on the analogy with DC motor operating principles. The VC of surface-mounted permanent magnet pole motors and interior permanent magnet (IPM) motors are presented in various reference frames. Current and voltage operating limits are incorporated into the control systems. Flux control modes of operation of PMS motors together with the corresponding control means in different reference frames are also presented in detail, as a particular feature of this book. These include maximum torque per ampere (MTPA) control, maximum torque per voltage control, and unity power factor control. Finally, loss minimization control by offline and online strategies is elaborated after presenting the method of motors loss reduction and the PMS motor loss modeling.

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20

Wide temperature magnetization characteristics of transverse magnetically annealed amorphous tapes for high frequency aerospace magnetics. [Cleveland, Ohio]: National Aeronautics and Space Administration, Glenn Research Center, 1999.

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21

Walsh, Richard A. A New Loss of Order. Oxford University Press, 2016. http://dx.doi.org/10.1093/med/9780190607555.003.0013.

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The priority in the investigation of sporadic adult-onset ataxia is to identify potentially treatable causes, to improve gait or to reduce risk of recurrence. Disorders such as multiple sclerosis, alcohol-related cerebellar degeneration, and vitamin B12 deficiency are far more common than rarer causes such as paraneoplastic syndromes or recessive genetic disorders. Routine biochemistry, magnetic resonance imaging, and cerebrospinal fluid studies are typically performed as part of the workup to guide any further intervention and investigations. Advances in genetic testing using next-generation sequencing are revealing that many patients with presumed nongenetic sporadic ataxias have a genetic cause for their symptoms. Expert opinion to guide genetic testing in cases in which no alternative cause of ataxia is found is advisable.

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22

Vaez-Zadeh, Sadegh. Machine Modeling. Oxford University Press, 2018. http://dx.doi.org/10.1093/oso/9780198742968.003.0002.

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This chapter presents dynamic and steady-state modeling of permanent magnet synchronous (PMS) machines with the help of reference frames. The modeling starts with a machine model in terms of phase variables. An equivalent two-axis model in a stationary reference is then obtained by a reference frame transformation. A further transformation to a two-axis rotor reference frame, with its direct axis aligned with the axis of a permanent magnet rotor pole, is derived. Another transformation to a two-axis stator flux linkage reference frame is also presented. Finally, a motor model in polar coordinates, based on space vector theory, is developed. In this chapter, PMS motor equivalent circuits are drawn, based on the mathematical models where appropriate. Iron losses and iron saturation are also taken into the models. The chapter ends with a brief presentation of the dynamic equation of PMS machines mechanical parts.

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23

Vaez-Zadeh, Sadegh. Direct Torque Control. Oxford University Press, 2018. http://dx.doi.org/10.1093/oso/9780198742968.003.0004.

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The fundamental principles of direct torque control (DTC) of permanent magnet synchronous (PMS) motors are presented in this chapter. The basic DTC system is then described. The operating limits of PMS machines under DTC are presented in terms of current limit, voltage limit, and flux linkage limit. Also, flux linkage control, including maximum torque per ampere (MTPA), unity power factor, and flux weakening at high speed, is derived. Then, alternative DTC schemes, including different SVM-DTC schemes, are presented. In line with the increasing energy-saving tendency in industrial applications, major emphasis is placed on the loss minimization of DTC. Finally, a comprehensive comparison was made between the basic DTC and vector control, emphasizing the pros and cons of DTC with respect to vector control.

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24

(Editor), M. Parans Paranthaman, and Venkat Selvamanickam (Editor), eds. Flux Pinning and AC Loss Studies on YBCO Coated Conducters. Nova Science Pub Inc, 2007.

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25

Massimini, Marcello, and Giulio Tononi. Assessing Consciousness in Other Humans: From Theory to Practice. Translated by Frances Anderson. Oxford University Press, 2018. http://dx.doi.org/10.1093/oso/9780198728443.003.0007.

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This chapter translates the theoretical principles illustrated in Chapter 5 into an empirical measure that can be applied to real human brains. It explains how transcranial magnetic stimulation (TMS) and simultaneous electroencephalography (EEG) can be employed to derive a surrogate measure of information integration, the perturbational complexity index (PCI). By describing the results of a series of experiments, it demonstrates that PCI can discriminate with very high accuracy between consciousness and unconsciousness, across many different conditions, ranging from wakefulness to sleep, dreaming esthesia and coma patients. The chapter ends by suggesting that principled measures of brain complexity can also help understanding the mechanisms of loss and recovery of consciousness in both physiological and pathological conditions.

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26

Park, John G. Diagnosis and Common Disorders. Oxford University Press, 2012. http://dx.doi.org/10.1093/med/9780199755691.003.0616.

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Common symptoms of pulmonary disease include cough, sputum, hemoptysis, dyspnea, chest pain, cyanosis, and clubbing. A thorough history and physical examination, including palpation, auscultation, and percussion, are key to accurate diagnosis. The radiologic tests performed in the diagnosis of chest diseases include plain CXR, CT, magnetic resonance imaging, pulmonary angiography, and bronchial angiography. Simple microscopy with a "wet" slide preparation of sputum is helpful in assessing the degree of sputum eosinophilia and detecting the presence of Charcot-Leyden crystals. The major indication for pulmonary function tests (PFTs) is dyspnea. PFT results do not diagnose lung disease, but they are used to assess the mechanical function of the respiratory system and to quantify the loss of lung function. Obstructive, restrictive, and occupational lung diseases are reviewed.

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27

Bichet, Daniel G. Approach to the patient with polyuria. Edited by Robert Unwin. Oxford University Press, 2015. http://dx.doi.org/10.1093/med/9780199592548.003.0032.

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In a polyuric patient, first exclude osmotic diuresis, then differentiate between primary polydipsia, central, and nephrogenic diabetes insipidus, with clinical characteristics, simple blood and urine tests, and hypothalamic magnetic resonance imaging. Mammals are osmoregulators and osmolality is perceived by central and peripheral osmotic receptors and influencing thirst perception and vasopressin secretion. In congenital polyuric states it is useful to distinguish ‘pure’ polyuric states, that is, loss of water only but normal conservation of sodium, potassium, chloride, and calcium, from complex (water + sodium + calcium) polyuric states. For the latter, the triad polyuria/polyhydramnios/prematurity is a tell-tale sign of Bartter syndrome. We recommend sequencing of the nephrogenic diabetes insipidus and Bartter genes in all the affected congenital and hereditary polyuric patients. Acquired central and nephrogenic polyuric states are simpler to evaluate.

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28

Rosen, Marvin, and Michele Alpern. The Effects of Job Loss on the Family (Focus on Family Matters). Chelsea House Publications, 2002.

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29

Raper, Daniel M. S., and John A. Jane. Craniopharyngiomas. Oxford University Press, 2018. http://dx.doi.org/10.1093/med/9780190696696.003.0025.

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Craniopharyngiomas (CPs) are rare tumors arising from the developmental Rathke’s pouch and present in a bimodal distribution peaking at 5 to 14 and 50 to 74 years. Symptoms at onset include visual loss, headache, and hypopituitarism. Most tumors contain solid and cystic components, and fluid within the cyst usually contains cholesterol crystals. Histopathology is classified into adamantinomatous (most common in children) and papillary (almost exclusively in adults) subtypes. Magnetic resonance imaging is the definitive diagnostic modality for sellar and suprasellar lesions. In addition to imaging, formal visual evaluation and detailed endocrinologic workup are a critical aspect of preoperative assessment. The role of radical surgical resection, versus decompression combined with radiotherapy, remains controversial. The most common complications of surgical and radiotherapeutic treatments include pituitary stalk and hormonal deficiencies, along with cerebrospinal fluid leak. As 5-year overall survival for patients with CP is in the range of 55% to 85%, CP remains a challenging condition to treat and requires a multidisciplinary approach.

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30

Adapa, Ram, and Anthony Absalom. Central nervous system physiology in anaesthetic practice. Edited by Jonathan G. Hardman. Oxford University Press, 2017. http://dx.doi.org/10.1093/med/9780199642045.003.0006.

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How and where consciousness is generated and maintained remains an unsolved scientific mystery, and this has impeded progress in understanding anaesthesia. In recent years, however, significant progress has been made in understanding the neurobiology of anaesthetic-induced loss of consciousness. This has been made possible by advances in molecular biology techniques, which have helped shed light on the molecular mechanisms of action of the anaesthetic agents. In parallel, the development of neuroimaging techniques, such as functional magnetic resonance imaging and positron emission tomography, has also provided an enormous impetus. These techniques are providing new insights into the neural correlates of consciousness, and new insights into the alterations in neurophysiology associated with impaired consciousness caused by sleep, sedation, and anaesthesia. The information being gained from these studies on the neurobiology of impairments of attention, awareness, and memory will hopefully eventually not only lead to improvements in our understanding of consciousness and anaesthesia, but also to better clinical care. Understanding of memory functions during sedation and anaesthesia may, for example, lead to better strategies for preventing awareness with subsequent explicit recall of intraoperative events. Further, a better understanding of the neurobiology of anaesthetic-induced unconsciousness may inform future development of better anaesthetic agents, with a broader therapeutic index, and fewer unwanted effects.

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31

Horing, Norman J. Morgenstern. Random Phase Approximation Plasma Phenomenology, Semiclassical and Hydrodynamic Models; Electrodynamics. Oxford University Press, 2018. http://dx.doi.org/10.1093/oso/9780198791942.003.0010.

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Chapter 10 reviews both homogeneous and inhomogeneous quantum plasma dielectric response phenomenology starting with the RPA polarizability ring diagram in terms of thermal Green’s functions, also energy eigenfunctions. The homogeneous dynamic, non-local inverse dielectric screening functions (K) are exhibited for 3D, 2D, and 1D, encompassing the non-local plasmon spectra and static shielding (e.g. Friedel oscillations and Debye-Thomas-Fermi shielding). The role of a quantizing magnetic field in K is reviewed. Analytically simpler models are described: the semiclassical and classical limits and the hydrodynamic model, including surface plasmons. Exchange and correlation energies are discussed. The van der Waals interaction of two neutral polarizable systems (e.g. physisorption) is described by their individual two-particle Green’s functions: It devolves upon the role of the dynamic, non-local plasma image potential due to screening. The inverse dielectric screening function K also plays a central role in energy loss spectroscopy. Chapter 10 introduces electromagnetic dyadic Green’s functions and the inverse dielectric tensor; also the RPA dynamic, non-local conductivity tensor with application to a planar quantum well. Kramers–Krönig relations are discussed. Determination of electromagnetic response of a compound nanostructure system having several nanostructured parts is discussed, with applications to a quantum well in bulk plasma and also to a superlattice, resulting in coupled plasmon spectra and polaritons.

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32

Rafferty, Gerrard, and John Moxham. Assessment of Peripheral and Respiratory Muscle Strength in ICU. Oxford University Press, 2014. http://dx.doi.org/10.1093/med/9780199653461.003.0047.

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Skeletal muscle weakness affecting the respiratory and peripheral muscles is common in critically ill patients and can lead to difficulties in weaning, prolonged ICU admission, and significant morbidity in survivors. A number of techniques can be used to assess muscle strength. In the peripheral muscles, volitional techniques employing scoring systems or portable hand dynamometers are relatively simple and quick to use, requiring little or no specialist equipment. Such techniques can, however, only be applied to conscious and cooperative patients, preventing assessment of muscle weakness in many ICU patients. The volitional requirement also limits the ability to distinguish poor motivation and impaired cognition from true loss of muscle function. Non-volitional techniques involving motor nerve stimulation provide measures of muscle force production in non-cooperative patients but require specialist equipment. Normative data for comparative purposes are limited. Also, it is not clear which peripheral muscle best reflects generalized muscle weakness. Measurements of maximal inspiratory and expiratory pressures are widely used to assess respiratory muscle strength in ICU patients and are applicable to patients who can make some respiratory effort. As with all tests requiring patient cooperation, reliability is limited. Phrenic nerve stimulation allows direct, non-volitional assessment of diaphragm and phrenic nerve function, and normative values for comparative purposes are available. Magnetic phrenic nerve stimulation is well tolerated, can be performed in the presence of vascular catheters, and is used to document respiratory muscle weakness and track progression in critically ill patients.

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33

Widdig, Vincent, ed. Kulturgüterschutz im System der Vereinten Nationen. Nomos Verlagsgesellschaft mbH & Co. KG, 2021. http://dx.doi.org/10.5771/9783845296166.

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The images of the destroyed Buddha statues of Bamiyan, of the ancient city of Palmyra lying in ruins, and of destroyed World Heritage sites in Timbuktu have received much attention from the international public. At the same time, these cases also reflect a new dimension in the conduct of armed hostilities today, which is increasingly aimed at destroying cultural identities or heritage. Therefore, in addition to the issue of preserving the world's cultural heritage, especially in the context of human rights protection and international humanitarian law, the protection of cultural property is seen as an increasingly important task for the United Nations and its institutions. Pieces of Art, significant written documents, memorials, and places of worship are deliberately destroyed in conflicts by armed or terrorist groups, such as the so-called Islamic State, as they represent core elements of cultural identity. The increasing number of reports on the loss of priceless cultural assets in Syria, Iraq and Mali exemplify this. Increasingly, violent non-state actors are deliberately using the destruction of cultural property as a means of warfare and even "ethnic cleansing." For the international community, this makes the protection of cultural property in armed conflicts and in the field of restoring statehood at the same time increasingly significant. The preservation of this global human memory is one of the greatest challenges of modern social, political, and legal discourses. Although the use of the destruction of cultural property to divide societies, even to erase a collective memory or destroy social structures, has long been part of warfare, this aspect has been insufficiently considered by the media public and especially in academic discourse. With contributions by Frederik Becker, Dr. Manuel Brunner, Paul Fabel, Dr. Martin Gerner, Dario Haux, Ruth Lechner, Prof. Dr. Antionette Maget Dominicé and Vincent Widdig.

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