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Author: Ed Hare
Publisher: American Radio Relay League (ARRL)
ISBN: 9780872596627
Category : Amateur radio stations
Languages : en
Pages :
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Book Description
Meet the FCC RF exposure regulations! It's not complicated! Learn how to operate your station safely and legally using simple step-by-step ARRL worksheets and tables.
Author: Ed Hare
Publisher: American Radio Relay League (ARRL)
ISBN: 9780872596627
Category : Amateur radio stations
Languages : en
Pages :
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Book Description
Meet the FCC RF exposure regulations! It's not complicated! Learn how to operate your station safely and legally using simple step-by-step ARRL worksheets and tables.
Author: William F. Hammett
Publisher: McGraw-Hill Companies
ISBN:
Category : Self-Help
Languages : en
Pages : 218
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Book Description
Author: Patrick Staebler
Publisher: John Wiley & Sons
ISBN: 1119384524
Category : Science
Languages : en
Pages : 371
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Book Description
Everyone, whether they like it or not, is exposed to electromagnetic fields, most of the time, at very low levels. In this case, they are inconsequential, but they can cause adverse health effects when they become intense enough. This topic is complex and sensitive. Covering frequencies from 0 Hz to 300 GHz, Human Exposure to Electromagnetic Fields provides an overview of this vast topic. After a reminder of the concepts of electromagnetic fields, the author presents some examples of sources of radiation in daily life and in the industrial or medical sectors. The biophysical and biological effects of these fields on the human body are detailed and the exposure limits are recalled. The exposure assessment and the implementation of the appropriate regulation within companies are also covered. Technically and practically, this book is aimed at people with a scientific background, risk prevention actors, health physicians, especially occupational doctors, and equipment designers.
Author: Dean James Friesen
Publisher: Artech House
ISBN: 1630819298
Category : Technology & Engineering
Languages : en
Pages : 260
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Book Description
This practical text gives engineers and technicians at all levels an easy-to-follow entry point into the subject of RF/EM wave propagation and antennas. While aimed primarily at those who are entering the field or transitioning from a related field, the book also helps experienced professionals obtain a more refined understanding of the various methodologies and processes in this area. The book covers the essentials, practices, technical details, and considerations needed to help a team of engineers design, install, and/or predict the technical performance of a new (or even existing) one-way, two-antenna (long radiating distance) RF communication system. The chapters are organized logically to walk you step by step through the application processes, showing you proven methods to bring about top performance, while also helping you factor in unanticipated variances, including those caused by the earth itself, earth’s gaseous atmosphere, rain, snow, hail, ice, ionospheric signal attenuation, and EM waves. This kind of understanding and consideration saves time, money, and much frustration in a project. With this book in hand, you will better understand RF/EM wave propagation and the technical vernacular used to describe it; become familiar with the various processes and considerations in analyzing, designing, and predicting the performance of new and existing antenna RF communications systems; and more confidently approach problem solving and possible solutions for reducing signal interference and loss. The chapter contents, while not sparing the reader exposure to radiated RF system design and analysis terminology, are written in a relaxed, conversational tone and easy-to-understand manner, making this a perfect learning tool for those entering or transitioning to this field, as well as an excellent supplement or foundational text for an instructional course. The book’s logically organized and easy-to-access chapter structure also facilitates its use as a bench reference for quick lookup or review.
Author: Samuel Milham MD MPH
Publisher: iUniverse
ISBN: 1938908198
Category : Biography & Autobiography
Languages : en
Pages : 131
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Book Description
When Thomas Edison began wiring New York City with a direct current electricity distribution system in the 1880s, he gave humankind the magic of electric light, heat, and power; in the process, though, he inadvertently opened a Pandoras Box of unimaginable illness and death. Dirty Electricity tells the story of Dr. Samuel Milham, the scientist who first alerted the world about the frightening link between occupational exposure to electromagnetic fields and human disease. Milham takes readers through his early years and education, following the twisting path that led to his discovery that most of the twentieth century diseases of civilization, including cancer, cardiovascular disease, diabetes, and suicide, are caused by electromagnetic field exposure. In the second edition, he explains how electrical exposure does its damage, and how electricity is causing our current epidemics of asthma, diabetes and obesity. Dr. Milham warns that because of the recent proliferation of radio frequency radiation from cell phones and towers, terrestrial antennas, Wi-Fi and Wi-max systems, broadband internet over power lines, and personal electronic equipment, we may be facing a looming epidemic of morbidity and mortality. In Dirty Electricity, he reveals the steps we must take, personally and as a society, to coexist with this marvelous but dangerous technology.
Author: John S. Seybold
Publisher: John Wiley & Sons
ISBN: 0471743682
Category : Technology & Engineering
Languages : en
Pages : 348
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Book Description
An introduction to RF propagation that spans all wireless applications This book provides readers with a solid understanding of the concepts involved in the propagation of electromagnetic waves and of the commonly used modeling techniques. While many books cover RF propagation, most are geared to cellular telephone systems and, therefore, are limited in scope. This title is comprehensive-it treats the growing number of wireless applications that range well beyond the mobile telecommunications industry, including radar and satellite communications. The author's straightforward, clear style makes it easy for readers to gain the necessary background in electromagnetics, communication theory, and probability, so they can advance to propagation models for near-earth, indoor, and earth-space propagation. Critical topics that readers would otherwise have to search a number of resources to find are included: * RF safety chapter provides a concise presentation of FCC recommendations, including application examples, and prepares readers to work with real-world propagating systems * Antenna chapter provides an introduction to a wide variety of antennas and techniques for antenna analysis, including a detailed treatment of antenna polarization and axial ratio; the chapter contains a set of curves that permit readers to estimate polarization loss due to axial ratio mismatch between transmitting and receiving antennas without performing detailed calculations * Atmospheric effects chapter provides curves of typical atmospheric loss, so that expected loss can be determined easily * Rain attenuation chapter features a summary of how to apply the ITU and Crane rain models * Satellite communication chapter provides the details of earth-space propagation analysis including rain attenuation, atmospheric absorption, path length determination and noise temperature determination Examples of widely used models provide all the details and information needed to allow readers to apply the models with confidence. References, provided throughout the book, enable readers to explore particular topics in greater depth. Additionally, an accompanying Wiley ftp site provides supporting MathCad files for select figures in the book. With its emphasis on fundamentals, detailed examples, and comprehensive coverage of models and applications, this is an excellent text for upper-level undergraduate or graduate students, or for the practicing engineer who needs to develop an understanding of propagation phenomena.
Author: Devra Davis
Publisher: Penguin
ISBN: 1101443480
Category : Health & Fitness
Languages : en
Pages : 238
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Book Description
"As [Disconnect] shows, cell phones may actually be doing damage to far more than our attention spans-and could, in fact, be killing us." -Salon.com. Since the invention of radar, cell phone radiation was assumed to be harmless because it wasn't like X-rays. But a sea change is now occurring in the way scientists think about it. The latest research ties this kind of radiation to lowered sperm counts, an increased risk of Alzheimer's, and even cancer. In Disconnect, National Book Award finalist Devra Davis tells the story of the dangers that the cell phone industry is knowingly exposing us-and our children-to in the pursuit of profit. More than five billion cell phones are currently in use, and that number increases every day. Synthesizing the findings and cautionary advice of leading experts in bioelectricalmagnetics and neuroscience, Davis explains simple safety measures that no one can afford to ignore.
Author: Ronald Kitchen
Publisher: Newnes
ISBN: 9780750643559
Category : Nature
Languages : en
Pages : 446
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Book Description
The leading professional guide to RF and microwave safety issues. A practical handbook for all involved in electronic design and safety assessment, RF and Microwave Radiation Safety covers the problems of RF safety management, including the use of measuring instruments and methods, radiation hazards and risks resulting from electromagnetic interference, as well as reviewing current safety standards and the implications for RF design. The second edition takes into account a wide range of technical and legislative changes, and has been revised in line with the latest EU and international standards. Issues raised by increasing levels of microwave pollution from mobile phones and other sources are also confronted. New material covers: International Radiological Protection Commission (IRPC): new recommendations published in 1998 European Broadcasting Union (EBU)'s new guide EU Physical Agents Directive and Machines Directive (both of which cover radio transmitters) UK National Radiological Protection Board (UKNRPB) new guidance on safety levels Covers radiation hazards and risks resulting from electromagnetic interference Leading professional guide to RF and microwave safety issues Revised in line with the latest the EU and international standards
Author: H. Ward Silver
Publisher: John Wiley & Sons
ISBN: 1119454824
Category : Technology & Engineering
Languages : en
Pages : 436
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Book Description
Your how-to guide to become a ham Ham radio, or amateur radio, is a way to talk with people around the world in real-time, or to send email without any sort of internet connection. It provides a way to keep in touch with friends and family, whether they are across town or across the country. It is also a very important emergency communication system. When cell phones, landlines, the internet, and other systems are down or overloaded, Amateur Radio still gets the message through. Radio amateurs, often called "hams," enjoy radio technology as a hobby, but are often called upon to provide vital service when regular communications systems fail. Ham Radio For Dummies is your guide to everything there is to know about ham radio. Plus, this updated edition provides new and additional information on digital mode operating, as well as use of amateur radio in student science and new operating events. • Set up your radio station • Design your ham shack • Provide support in emergencies and communicate with other hams • Study for the licensing exam and choose your call sign If you're looking to join a college radio club or just want to learn the latest tips and tricks, this book is a helpful reference guide to beginners, or those who have been "hams" for years.
Author: Martin Blank, PhD
Publisher: Seven Stories Press
ISBN: 1609805100
Category : Health & Fitness
Languages : en
Pages : 299
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Book Description
Keys, wallet, cell phone . . . ready to go! Cell phones have become ubiquitous fixtures of twenty-first-century life—suctioned to our ears and stuck in our pockets. Yet, we’ve all heard whispers that these essential little devices give you brain cancer. Many of us are left wondering, as Maureen Dowd recently asked in the New York Times, “Are cells the new cigarettes?” Overpowered brings readers, in accessible and fascinating prose, through the science, indicating biological effects resulting from low, non-thermal levels of non-ionizing electromagnetic radiation (levels considered safe by regulatory agencies), coming not only from cell phones, but many other devices we use in our homes and offices every day. Dr. Blank arms us with the information we need to lobby government and industry to keep ourselves and our families safe.
