Permanent Magnet and Electromechanical Devices

Permanent Magnet and Electromechanical Devices
Author: Edward P. Furlani
Publisher: Elsevier
Total Pages: 538
Release: 2001-09-05
Genre: Science
ISBN: 0080513697

The book provides both the theoretical and the applied background needed to predict magnetic fields. The theoretical presentation is reinforced with over 60 solved examples of practical engineering applications such as the design of magnetic components like solenoids, which are electromagnetic coils that are moved by electric currents and activate other devices such as circuit breakers. Other design applications would be for permanent magnet structures such as bearings and couplings, which are hardware mechanisms used to fashion a temporary connection between two wires.This book is written for use as a text or reference by researchers, engineers, professors, and students engaged in the research, development, study, and manufacture of permanent magnets and electromechanical devices. It can serve as a primary or supplemental text for upper level courses in electrical engineering on electromagnetic theory, electronic and magnetic materials, and electromagnetic engineering.

TID.

TID.
Author:
Publisher:
Total Pages: 226
Release: 1949
Genre: Energy development
ISBN:

Welfare Magnets

Welfare Magnets
Author: Paul E. Peterson
Publisher: Brookings Institution Press
Total Pages: 193
Release: 2010-12-01
Genre: Political Science
ISBN: 0815720483

"The best way of handling the question of how much to give the poor, politicians have discovered, is to avoid doing anything about it at all," note Paul Peterson and Mark Rom. The issue of the minimum people need in order to live decently is so difficult that Congress has left this crucial question to the states—even though the federal government foots three-fourths of the bill for about 15 million Americans who receive cash and food stamp benefits. The states differ widely in their assessment of what a family needs to meet a reasonable standard of living, and the interstate differences in welfare benefits cannot be explained by variations in wage levels or costs of living. The states with higher welfare benefits act as magnets by attracting or retaining poor people. In the competition to avoid becoming welfare havens, states have cut welfare benefits in real dollars by more than one-third since 1970. The authors propose the establishment of a minimum federal welfare standard, which would both reduce the interstate variation in welfare benefits and stem their overall decline. Peterson and Rom develop their argument in four steps. First they show how the politics of welfare magnets works in a case study of policymaking in Wisconsin. Second, they present their analysis of the overall magnet effect in American state politics, finding evidence that states with high welfare benefits experiencing disproportionate growth in their poverty rates make deeper welfare cuts. Third, they describe the process by which the current system came into being, identifying the reform efforts and political crises that have contributed to the centralization of welfare policy as well as the regional, partisan, and group interests that have resisted these changes. Finally, the authors propose a practical step that can go a long way toward achieving a national welfare standard; then assess it's cost, benefits, and political feasibility.

What Makes a Magnet?

What Makes a Magnet?
Author: Dr. Franklyn M. Branley
Publisher: HarperCollins
Total Pages: 36
Release: 2016-02-02
Genre: Juvenile Nonfiction
ISBN: 0062447009

Read and find out about magnets in this colorfully illustrated nonfiction picture book. Why does a magnet pick up a paper clip but not a leaf or a penny? How can the whole world be a magnet? Follow the step-by-step instructions about how to make your own magnet, and then find out for yourself what makes a magnet! This is a clear and appealing science book for early elementary age kids, both at home and in the classroom. It's a Level 2 Let's-Read-and-Find-Out, which means the book explores more challenging concepts for children in the primary grades. The 100+ titles in this leading nonfiction series are: hands-on and visual acclaimed and trusted great for classrooms Top 10 reasons to love LRFOs: Entertain and educate at the same time Have appealing, child-centered topics Developmentally appropriate for emerging readers Focused; answering questions instead of using survey approach Employ engaging picture book quality illustrations Use simple charts and graphics to improve visual literacy skills Feature hands-on activities to engage young scientists Meet national science education standards Written/illustrated by award-winning authors/illustrators & vetted by an expert in the field Over 130 titles in print, meeting a wide range of kids' scientific interests Books in this series support the Common Core Learning Standards, Next Generation Science Standards, and the Science, Technology, Engineering, and Math (STEM) standards. Let's-Read-and-Find-Out is the winner of the American Association for the Advancement of Science/Subaru Science Books & Films Prize for Outstanding Science Series.