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A Novel Cos-Sin based Protection for EHV Networks
71,90 € *
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The book introduces a new concept for EHV networks protection via digital protective relays. the new concept being named Cos-Sin is strictly examined against all normal and abnormal conditions in EHV networks. The Cos-Sin concept could be applied on both the voltage and current signals, where it relies on a simple mathematical approach that can be easily processed. The Cos-Sin based protection succeeded in detecting single phasing in large induction motors as well as all fault types on EHV transmission lines and bus bars. The new Cos-Sin Tool proved to be simple, reliable and accurate.

Anbieter: Dodax
Stand: 01.04.2020
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Fault diagnosis of induction motor fed by frequ...
39,99 € *
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Thesis (M.A.) from the year 2013 in the subject Electrotechnology, Warsaw University of Technology (Electrical Engineering), language: English, abstract: 3-Phase induction motors are widely used as a source of mechanical power for effective operation and low costs. The abnormalities have to be detected in advance to avoid the motor breakdown and the cost associated restrain of plant production. This work discusses current and flux leakage spectral analysis techniques for the diagnosis of broken rotor bars and shortcircuited turns in induction motor fed from different AC sources.In spite of recent development of various types of models toward motor faults diagnosis and examining different problems associated with 3-phase induction motors the signal spectral analysis is considered as one of most important approaches. Most of the models from simple equivalent circuit to more complex d-q and a-b-c models and lastly developed hybrid models are provided for the integration of different forms of current and/or voltage unbalance. Generally, techniques that relate to asymmetry identify asymmetrical motor faults.Frequency converters in many applications feed induction motors. Such applications, which play a major role in industry, are growing at a high rate, allow to use 3-phase induction motor as variable speed applications. This paper proposes application of spectral signature analysis for the detection and diagnosis of abnormal electrical and mechanical conditions, which indicates chosen faults in induction motor fed by frequency converter.

Anbieter: Dodax
Stand: 01.04.2020
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Cancerous Micronuclei
34,00 € *
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Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. Theodor Boveri originally observed the fact that abnormal nuclear morphologies commonly occurred in cancer. Micronuclei are also referred to Howell-Jolly bodies, founded by hematologists William Henry Howell and Justin Marie Jolly in erythrocytes. Micronuclei induction by a chemical was first reported in Ehrlich ascites tumor cells treated with colchicine. The affect of environmental stressors on the expression of micronuclei was first analyzed in root tip cells under ionizing radiation.

Anbieter: Dodax
Stand: 01.04.2020
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Minimalistic immunologically defined gene expre...
29,59 € *
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Equine melanomas are the most common neoplasms in older grey horses. Until now, no curative therapy is established. Xenogenic DNA vaccination represents a promising therapeutic approach.Goal of the present study was to evaluate the safety and clinical efficacy of vaccination of grey horses with natural occurring melanomas with MIDGE-Th1® vectors encoding for equine (eq) IL12 and eqILRAP-IL18 alone or in combination with human gp100 (hgp100) or human tyrosinase (htyr).Three groups (each n=9) of adult grey horses with variable numbers of melanomas received three intramuscular and three intradermal peritumoral vaccinations. Each group was treated with MIDGE-Th1® vectors coding for eqIL12 and eqILRAP-IL18. One group (group gp100) was additionally treated with 500 μg hgp100MIDGE-Th1® and one group with 500 μg htyrMIDGE-Th1® (group tyr). The third group did not receive additional DNA (group IL12/18). Vectors were complexed with the transfection agent SAINT-18.The injections were performed on days 1, 22 and 78 intradermally around one selected melanoma (locally treated melanoma) and intramuscularly as a systemic treatment. A general examination of the horses and evaluation of local reactions at the injection site were performed daily during hospitalisation (on the day of each injection and 3 days after each injection as well as on day 120). In each horse the locally treated melanoma and up to 8 non-locally treated melanomas were measured before each injection and on day 120 by calliper and ultrasound. The relative volumes were calculated in relation to day 1 (100%).For the evaluation of the generation of specific CD8+ cytotoxic T-cells against hgp100 and htyr, peripheral blood mononuclear cells (PBMCs) isolated before each injection and on day 120, were stimulated in vitro with autologous dermal cells transfected with hgp100 or htyr. Interferon γ (IFN γ) as a response to this specific stimulation was measured by intracellular immunofluorescence staining.Specific serum antibodies against hgp100 and htyr were measured at equivalent time points as cytotoxic T-cells using a cell based flow cytometric assay. Human embryonic kidney cells, transfected with hgp100 or htyr served as a source for antigens.The only consistent abnormal finding upon clinical examination of the treated horses was an increased body temperature. A significant increase in body temperature (38.7 ± 0.59 °C) was recorded after 40 of the 81 injections, and usually lasted for one day. Local inflammatory reactions and depigmentation were observed in all groups starting at day 3 after the first application.The relative tumor volume (%) was significantly reduced to 71.5 ± 29.73% (calliper measurements) and 87.0 ± 24.42% (ultrasound measurements). There were no significant differences detected between groups (gp100, tyr and IL12/18). No difference was seen in reduction of tumor volume between locally treated and non-locally treated melanoma.Neither a cellular nor a humoral immune response against the vaccine antigens could be detected.In this study, treatment with eqIL12 and eqILRAP-IL18 DNA in combination with SAINT-18 showed a systemic effect against grey horse melanoma. There was no additional clinical or immunological effect observed by vaccination with MIDGE-Th1® vectors encoding hgp100 and htyr. It remains unclear whether the antitumoral effect was caused by the interleukins, unmethylated CpG motifs or the induction of an immune reaction by the combination of DNA and transfection reagent.Reasons for the absence of a specific immune response may be an inadequate selection of dosages or treatment interval. It is also possible that the sensitivity of the immunoassays was too low to detect a subclinical immune response.Further studies to characterize the antitumoral effects of the treatment used in this study and modifications of the treatment protocol to achieve a potential specific immune response are warranted.

Anbieter: Dodax
Stand: 01.04.2020
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Male-Mediated Developmental Toxicity
263,00 CHF *
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The cause of many of the adverse reproductive outcomes and developmental diseases among offspring is not well understood. Most of the epidemiologic and experimental animal research has focused on the relationship between maternal exposures including medications, tobacco smoke, alcohol, infections, and occupation and the occurrence of spontaneous abortion, low birth weight, and birth defects. The potential role of paternal exposures has not been investigated as extensively despite long-standing animal research that demonstrates the induction of mutations in the male germ cell after exposure to certain agents and subsequent reproductive failure or early pregnancy loss. Given this relative lack of interest, acquisition of epidemiologic data and the development of a definitive model or mechanism for potential male-mediated effects has been hindered. However, recent laboratory and epidemiologic investigations have suggested that paternal exposures may be more important than previously suspected. This topic has been termed by some as 'male-mediated developmental toxicity. ' This is meant to refer to the effects of exposures and other factors relating to the male parent that result in toxicity to the conceptus and abnormal development. The developmental endpoints of interest can include fetal loss, congenital abnormalities, growth retardation, cancer, and neurobehavioral effects. These effects may operate through a variety of mechanisms including gene mutation, chromosomal aberrations, seminal fluid transfer of toxicants and epigenetic events.

Anbieter: Orell Fuessli CH
Stand: 01.04.2020
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Patterning and Cell Type Specification in the D...
280,00 CHF *
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Comprehensive Developmental Neuroscience offers the most thorough coverage of this field on the market today, addressing all aspects of how the nervous system and its components develop, with particular focus on the effects of abnormal development and on new psychiatric/neurological treatments being developed based on our increased understanding of developmental mechanisms. Each volume consists of review style articles that average 15 to 20 pages and feature numerous illustrations, a glossary of terms, full references, suggested readings, and a list of relevant websites/resources. This volume addresses the following topics: induction/patterning of the central and peripheral nervous systems, cognitive development, and disease.

Anbieter: Orell Fuessli CH
Stand: 01.04.2020
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The Law of Psychic Phenomena (1893)
65,90 CHF *
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I do not expect this book to stand upon its literary merits; for if it is unsound in principle, felicity of diction cannot save it, and if sound, homeliness of expression cannot destroy it. My primary object in offering it to the public is to assist in bringing Psychology within the domain of the exact sciences. That this has never been accomplished is owing to the fact that no successful attempt has been made to formulate a working hypothesis sufficiently comprehensive to embrace all psychic phenomena. It has, however, long been felt by the ablest thinkers of our time that all psychic manifestations of the human intellect, normal or abnormal, whether designated by the name of mesmerism, hypnotism, somnambulism, trance, spiritism, demonology, miracle, mental therapeutics, genius, or insanity, are in some way related; and consequently, that they are to be referred to some general principle or law, which, once understood, will simplify and correlate the whole subject-matter, and possibly remove it from the domain of the supernatural. The London Society for Psychical Research, whose ramifications extend all over the civilized world, was organized for the purpose of making a systematic search for that law. The Society numbers among its membership many of the ablest scientists now living. Its methods of investigation are purely scientific, and painstaking to the last degree, and its field embraces all psychic phenomena. It has already accumulated and verified a vast array of facts of the most transcendent interest and importance. In the mean time a large number of the ablest scientists of Europe and America have been pursuing independent investigations in the phenomena of hypnotism. They too have accumulated facts and discovered principles of vast importance, especially in the field of mental therapeutics, - principles which also throw a flood of light upon the general subject of Psychology. This vast array of facts, thus accumulated and verified, and awaiting scientific classification and analysis, would seem to justify at least a tentative effort to apply to them the processes of induction, to the end that the fundamental law of psychic phenomena may be discovered. In the following pages I have attempted such a classification of verified phenomena, accounts of which I find in the literature current on the subject; and I have tentatively formulated a working hypothesis for the systematic study of all classes of psychic phenomena. It will be observed that I have availed myself largely of the labors of others, instead of confining myself to experimental researches of my own. I have done this for two reasons: first, that I might avoid the accusation of having conducted a series of experiments for the purpose of sustaining a pet theory of my own; and second, because I hold that substantial progress cannot be made in science until one is ready to accord due credit to human integrity, and to give due weight to human testimony. In conclusion, I desire to say that I claim no credit for this work, save that which is due to an honest desire to promote the truth for its own sake. Sincerely believing in the correctness of my hypothesis, I have not hesitated to follow it to its legitimate conclusion in every field which I have entered. If at the close of the book I have seemed to trespass upon the forbidden field of theological discussion, it was not for the purpose of sustaining any preconceived opinions of my own; far from it. It was because I was irresistibly led to my conclusions by the terms of my hypothesis and the inflexible logic of its application. I cannot but be aware that my conclusions sometimes oppose the preconceived opinions of others. But no one who accepts my hypothesis as the true one will be compelled more frequently than I have been to renounce his former convictions.

Anbieter: Orell Fuessli CH
Stand: 01.04.2020
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Current Signature Analysis for Condition Monito...
222,00 CHF *
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Provides coverage of Motor Current Signature Analysis (MCSA) for cage induction motors This book is primarily for industrial engineers. It has 13 chapters and contains a unique data base of 50 industrial case histories on the application of MCSA to diagnose broken rotor bars or unacceptable levels of airgap eccentricity in cage induction motors with ratings from 127 kW (170 H.P.) up to 10,160 kW (13,620 H.P.). There are also unsuccessful case histories, which is another unique feature of the book. The case studies also illustrate the effects of mechanical load dynamics downstream of the motor on the interpretation of current signatures. A number of cases are presented where abnormal operation of the driven load was diagnosed. Chapter 13 presents a critical appraisal of MCSA including successes, failures and lessons learned via industrial case histories. * The case histories are presented in a step by step format, with predictions and outcomes supported by current spectra and photographic evidence to confirm a correct or incorrect diagnosis * The case histories are presented in detail so readers fully understand the diagnosis * The authors have 108 years of combined experience in the installation, maintenance, repair, design, manufacture, operation and condition monitoring of SCIMs * There are 10 questions at the end of chapters 1 to 12 and answers can be obtained via the publisher Current Signature Analysis for Condition Monitoring of Cage Induction Motors serves as a reference for professional engineers, head electricians and technicians working with induction motors. To obtain the solutions manual for this book, please send an email to pressbooks@ieee.org. William T. Thomson is Director and Consultant with EM Diagnostics Ltd, in Scotland. Prof. Thomson received a BSc (Hons) in Electrical Engineering in 1973 and an MSc in 1977 from the University of Strathclyde. He has published 72 papers on condition monitoring of induction motors in a variety of engineering journals such as IEEE Transactions (USA), IEE Proceedings (UK), and also at numerous International IEEE and IEE conferences. He is a senior member of the IEEE, a fellow of the IEE (IET) in the UK and a Chartered Professional Engineer registered in the UK. Ian Culbert was a Rotating Machines Specialist at Iris Power Qualitrol since April 2002 until his very untimely death on 8th September, 2015. At this company he provided consulting services to customers, assisted in product development, trained sales and field service staff and reviewed stator winding partial discharge reports. He has co-authored two books on electrical machine insulation design, evaluation, aging, testing and repair and was principal author of a number of Electric Power Research Institute reports on motor repair. Ian was a Registered Professional Engineer in the Province of Ontario, Canada and a Senior Member of IEEE.

Anbieter: Orell Fuessli CH
Stand: 01.04.2020
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Current Signature Analysis for Condition Monito...
115,00 CHF *
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Provides coverage of Motor Current Signature Analysis (MCSA) for cage induction motors This book is primarily for industrial engineers. It has 13 chapters and contains a unique data base of 50 industrial case histories on the application of MCSA to diagnose broken rotor bars or unacceptable levels of airgap eccentricity in cage induction motors with ratings from 127 kW (170 H.P.) up to 10,160 kW (13,620 H.P.). There are also unsuccessful case histories, which is another unique feature of the book. The case studies also illustrate the effects of mechanical load dynamics downstream of the motor on the interpretation of current signatures. A number of cases are presented where abnormal operation of the driven load was diagnosed. Chapter 13 presents a critical appraisal of MCSA including successes, failures and lessons learned via industrial case histories. The case histories are presented in a step by step format, with predictions and outcomes supported by current spectra and photographic evidence to confirm a correct or incorrect diagnosis The case histories are presented in detail so readers fully understand the diagnosis The authors have 108 years of combined experience in the installation, maintenance, repair, design, manufacture, operation and condition monitoring of SCIMs There are 10 questions at the end of chapters 1 to 12 and answers can be obtained via the publisher Current Signature Analysis for Condition Monitoring of Cage Induction Motors serves as a reference for professional engineers, head electricians and technicians working with induction motors. To obtain the solutions manual for this book, please send an email to pressbooks@ieee.org. William T. Thomson is Director and Consultant with EM Diagnostics Ltd, in Scotland. Prof. Thomson received a BSc (Hons) in Electrical Engineering in 1973 and an MSc in 1977 from the University of Strathclyde. He has published 72 papers on condition monitoring of induction motors in a variety of engineering journals such as IEEE Transactions (USA), IEE Proceedings (UK), and also at numerous International IEEE and IEE conferences. He is a senior member of the IEEE, a fellow of the IEE (IET) in the UK and a Chartered Professional Engineer registered in the UK. Ian Culbert was a Rotating Machines Specialist at Iris Power Qualitrol since April 2002 until his very untimely death on 8th September, 2015. At this company he provided consulting services to customers, assisted in product development, trained sales and field service staff and reviewed stator winding partial discharge reports. He has co-authored two books on electrical machine insulation design, evaluation, aging, testing and repair and was principal author of a number of Electric Power Research Institute reports on motor repair. Ian was a Registered Professional Engineer in the Province of Ontario, Canada and a Senior Member of IEEE.

Anbieter: Orell Fuessli CH
Stand: 01.04.2020
Zum Angebot