Axial Flux Permanent Magnet (AFPM) brushless machines are modern electrical machines with a lot of advantages over their conventional counterparts. This timeless and revised second edition deals with the analysis, construction, design, control and applications of AFPM machines. The authors present their own research results, as well as significant research contributions made by others.
This second edition has been brought up to date by the inclusion of an extensive new chapter on aspects relevant to high-temperature superconductors. The new edition provides researchers, engineers and other scientists with an introduction to the field and makes useful supplementary reading for graduate students in low-temperature physics.
Investigates whether an industry in the U.S. is threatened with material injury by reason of imports from France of calcium aluminate (CA) flux, that have been found by the Dept. of Commerce to be sold in the U.S. at less than fair value. Tables and figures.
A Single Quantum Flux Superconducting Logic Device
Author: Willy Hioe
Publisher: World Scientific
Category: Technology & Engineering
This book concerns a Josephson device for supercomputers which has extremely low heat dissipation (about 106 times less than semiconductor devices and 103 times less than voltage-based Josephson devices). In the previous book on Quantum Flux Parametrons (QFPs), DC Flux Parametron, the basic device operation are described. This book deals in much greater depth on the problems which are faced by the QFP. The device characteristics are worked out in detail showing clearly the analysis methods used. A new logic gate using the QFP is described with respect to its basic scheme, operation, and ways for forming logic circuits. The problems faced by the basic QFP are much reduced in the new logic gate. As the QFP operates near the Heisenberg and Boltzmann limits for computing devices, we also show the relationship between speed and stability. The book contains the latest analytical results on QFPs.The material presented in the book can be understood with very little mathematical training or knowledge about superconducting physics. It is also self-contained and does not require reading of other material. Most of the device characteristics can be reproduced from the equations given using simple programs. A circuit simulator is not needed except for high speeds when transient behavior becomes important.
Principles and Workflow Examples for Scientific and Industrial Applications
Author: George Burba
Publisher: LI-COR Biosciences
This book was written to familiarize beginners with general theoretical principles, requirements, applications, and processing steps of the Eddy Covariance method. It is intended to assist in further understanding the method, and provides references such as textbooks, network guidelines and journal papers. It is also intended to help students and researchers in field deployment of instruments used with the Eddy Covariance method, and to promote its use beyond micrometeorology.
What Marketing Managers Need to Navigate the New Environment
Author: David Soberman
Publisher: University of Toronto Press
Category: Business & Economics
The past decade has seen a number of developments that threaten the very fabric of how marketing activities have traditionally been conducted. On one hand, consumers are increasingly socially networked and value-conscious, with heightened expectations of how companies will react to their demands. Along with the challenges, however, come new opportunities: the growth of behavioural economics and the emergence of new data collection techniques, for instance, give marketers unprecedented access to previously hidden aspects of consumer behavior. Clearly, 'business as usual' is not an option for marketing managers who want their firms to stay in the game. To help managers adapt to the rapidly changing business environment, Flux offers a collection of the very best thinking on key areas of marketing activity and decision-making. Each chapter is written by a leading expert in a specific 'new' marketing subject area, from managing brands to dealing with new media, and addresses substantive challenges in that area while providing steps for taking action. The book's integrated approach makes it an excellent resource not only for marketing managers but any managers dealing with customers.
Unlike other homeless children, twelve-year-old Nellie can travel to other realities, and she uses this ability to try to find her mother and to escape from the Interior Police and a gang of boys called the Skulls.
The book covers the flux pinning mechanisms and properties and the electromagnetic phenomena caused by the flux pinning common for metallic, high-Tc and MgB2 superconductors. The condensation energy interaction known for normal precipitates or grain boundaries and the kinetic energy interaction proposed for artificial Nb pins in Nb-Ti, etc. are introduced for the pinning mechanism. Summation theories to derive the critical current density are discussed in detail. Irreversible magnetization and AC loss caused by the flux pinning are also discussed. The loss originally stems from the ohmic dissipation of normal electrons in the normal core driven by the electric field induced by the flux motion. The readers will learn why the resultant loss is of hysteresis type in spite of such mechanism. The influence of the flux pinning on the vortex phase diagram in high Tc superconductors is discussed and the dependencies of the irreversibility field are also described on other quantities such as anisotropy of superconductor, specimen size and electric field strength. Recent developments of critical current properties in various high-Tc superconductors and MgB2 are introduced. Other topics are: singularity in the case of transport current in a parallel magnetic field such as deviation from the Josephson relation, reversible flux motion inside pinning potentials which causes deviation from the critical state model prediction, the concept of the minimization of energy dissipation in the flux pinning phenomena which gives the basis for the critical state model, etc. Significant reduction in the AC loss in AC wires with very fine filaments originates from the reversible flux motion which is dominant in the two-dimensional pinning. The concept of minimum energy dissipation explains also the behavior of flux bundle size which determines the irreversibility line under the flux creep. The new edition has been thoroughly updated, with new sections on the progress in enhancing the critical current density in high temperature superconductors by introduction of artificial pinning centers, the effect of packing density on the critical current density and irreversibility field in MgB2 and derivation of the force-balance equation from the minimization of the free energy including the pinning energy.
Seven tales of possible fates for the human race by one of science fiction's most revered authors portrays the inner struggles of characters exploring their hidden selves. At the Publisher's request, this title is being sold without Digital Rights Management Software (DRM) applied.