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"INVENTICA 2023" provides an opportunity for all individuals passionate about creativity across all fields to discuss and exchange research ideas. "INVENTICA 2023" is a celebration event dedicated to inventors, creators in technique and art and also, a collaborative platform in a stimulating, innovational, cultural atmosphere, cultivated over the past 50 years by the School of Inventions in Iasi. It aims to showcase, disseminate and promote scientific research findings and cutting-edge technological advancements, while also identifying the progress and current state of the field of creativity. The "INVENTICA 2023" Conference encourages scientific investigation in invention, innovative and inventive products, and brings together researchers interested in the field of invention, innovation and creativity. The primary focus area of the "INVENTICA 2023" Conference include psycho-technical creation, technical creation methods, interdisciplinary research on optimizing human performance, creativity in engineering, the intersection of science and art, and intellectual property. The main purpose of the Conference as a study of creativity is to establish an academic forum for scientific innovation and creativity. The event also offers a valuable opportunity to communicate, network, and share research and innovation outcomes with a broad audience of the general public and users. The 27th Inventica International Conference is scheduled to be held on June 22nd - 23rd 2023 at the Aula Carmen Silva of Technical University "Gheorghe Asachi" in Iasi, Romania. The event is organized by the National Institute of Inventics Iasi at "Gheorghe Asachi" Technical University of Iasi and the Department of Digital Production Systems, Faculty of Machine Manufacturing and Industrial Management. Contact: inventica.conferinta@tuiasi.ro Instruction for Authors Copyright declaration Guidelines for Reviewers The Conference Fee (100 € for paper) includes: admission to all sections and on-line workshops, the volumes of Conference and certificate of attendance.

Technology & Engineering / Electrical. --- Technology --- Engineering 

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Engineering, Electrical --- Handbooks, tables, formulae, etc.,.

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Mechanical properties of solids --- Materials sciences --- Engineering, Electrical.

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Excerpt from the Preface The principal motivation for this work arose from the obvious desirability of finding a single quantity, a tag so to speak, to describe the noise performance of a two-terminal-pair amplifier. The possibility of the existence of such a quantity and even the general functional form which it might be expected to take were suggested by previous work of one of the authors on microwave tubes and their noise performance. This work showed that noise parameters of the electron beam set an ultimate limit to the entire noise performance of the amplifier that employed the beam. In the microwave tube case, however, the findings were based heavily upon the physical nature of the electron beam, and it was not immediately clear that a general theory of noise performance for any linear amplifier could be made without referring again to some detailed physical mechanism. In order to detach the study of noise performance from specific physical mechanisms, one had to have recourse to general circuit theory of active networks. Such a theory had grown up around the problems associated with transistor amplifiers, and important parts of it were available to us through the association of one of us with Professor S. J. Mason. This combination of circumstances led to the collaboration of the authors.Two major guiding principles, or clues, could be drawn from the experience on microwave tubes. One such clue was the general form of the probable appropriate noise parameter. The other was the recognition that matrix algebra and a proper eigenvalue formulation would be required in order to achieve a general theory without becoming hopelessly involved in algebraic detail.Essentially by trial and error, guided by some power-gain theorems in active circuit theory, we first found a few invariants of noisy networks. Afterward, while we were trying to decide around which quantities we should build a matrix-eigenvalue formulation leading to these same invariants, we were aided by the fact that Mr. D. L. Bobroff recognized a connection between the invariants which we had found and the problem of the available power of a multiterminal-pair network.Armed with this additional idea, we consulted extensively with Professor L. N. Howard of MIT's Department of Mathematics, in search of the appropriate matrix-eigenvalue problem. As a result of his suggestions, we were able to reach substantially the final form of the desired formulation.Once the proper eigenvalue approach was found, additional results and interpretations followed rapidly. In particular, the idea that the eigenvalue formulation should be associated with a canonical form of the noisy network was suggested in a conversation with Proessor Shannon.One of the principal results of the work is that it furnishes a single number, or tag, which may be said to characterize the amplifier noise performance on the basis of the signal-to-noise-ratio criterion. The novel features of this tag are two in number: First, it clears up questions of the noise performance of low-gain amplifiers or of the effect upon noise performance of degenerative feedback; second, it provides for the first time a systematic treatment of the noise performance of negative-resistance amplifiers. The latter results were not expected in the original motivation for the study but grew from insistent demands upon the internal consistency of the theory. It is interesting that the negative-resistance case will probably turn out to be one of the most important practical results of our work.Another result worth mentioning here, however, is the canonical form of linear noisy networks. This form summarizes in a clear, almost visual, manner the connection between the internal noise of a network at any particular frequency and its (resistive, positive, or negative) part.

Electronic circuits. --- Amplifiers (Electronics) --- Noise. --- ENGINEERING/Electrical Engineering

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"Preface The development of the electric motor is one of the greatest achievements of the modern energy conversion industry. Countless electric motors are being used in our daily lives for critical service applications such as transportation, medical treatment, military operation, communication, etc. However, due to the fundamental limitations of material life time, deterioration, contamination, manufacturing defects, or damages in operations, an electrical motor will eventually go into failure mode. An unexpected failure might lead to the loss of valuable human life or a costly standstill in industry, which needs to be prevented by precisely detecting or continuously monitoring the working condition of a motor. This book was written to provide a full review of diagnosis technologies and an application guide for graduate and senior undergraduate students in power electronics discipline who want to research, develop, and implement a fault diagnosis & condition monitoring scheme for better safety and improved reliability in electric motor operation. Furthermore, electrical and mechanical engineers in industry are also encouraged to take portions of materials in this book as a reference to understand the fundamentals of fault cause and effect and to fulfill successful implementation"--

Electric machinery --- Machine parts --- Machinery --- TECHNOLOGY & ENGINEERING / Electrical. --- TECHNOLOGY & ENGINEERING / Electronics / General. --- Reliability. --- Failures. --- Monitoring.