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Author : Ed Hare
Publisher : American Radio Relay League (ARRL)
Page : 128 pages
File Size : 50,9 Mb
Release : 1998-01-01
Category : Amateur radio stations
ISBN : 0872596621
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 : H. Ward Silver
Publisher : American Radio Relay League
Page : 307 pages
File Size : 55,6 Mb
Release : 2006
Category : Amateur radio operators
ISBN : 9780872599635
The most popular introduction to amateur radio, this guide offers a unique mix of technology, public service, convenience, and fun. All levels of ham radio operators can brush up on their skills and use the book to study for their first license exam with the latest questions pool with answer key.
Author : R. Timothy Hitchcock,Robert M. Patterson
Publisher : John Wiley & Sons
Page : 560 pages
File Size : 50,8 Mb
Release : 1995-03-08
Category : Sports & Recreation
ISBN : 0471284548
Tailored especially for the working health professional, Radio Frequency and ELF Electrogmagnetic Energies is a practical guide to understanding, evaluating, and controlling the human health effects of radio-frequency (RF) and extremely low frequency (ELF) electromagnetic fields. Providing a perfect blend of applied information and theory, you'll find all you need to know about radiation safety, from the basic physics to how to set up a safety program. This book brings you cutting-edge discussions of exposure limits, monitoring instrumentation, new measurements required by human exposure standards, induced currents and contact currents, and the latest data on biological effects.
Author : John S. Seybold
Publisher : John Wiley & Sons
Page : 348 pages
File Size : 55,8 Mb
Release : 2005-10-03
Category : Technology & Engineering
ISBN : 9780471743682
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 : Martin Blank, PhD
Publisher : Seven Stories Press
Page : 299 pages
File Size : 43,6 Mb
Release : 2014-09-16
Category : Health & Fitness
ISBN : 9781609805104
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.
Author : Anonim
Publisher : American Radio Relay League
Page : 338 pages
File Size : 44,7 Mb
Release : 2007-08-16
Category : Technology & Engineering
ISBN : 9780872591042
Author : H. Ward Silver
Publisher : American Radio Relay League
Page : 500 pages
File Size : 45,6 Mb
Release : 2008
Category : Study Aids
ISBN : 9780872591356
"Pass the 50-question Extra Class test; all the exam questions with answer key, for use beginning July 1, 2008 to June 30, 2012; detailed explanations for all questions including FCC rules"--Cover.
Author : H. Ward Silver
Publisher : John Wiley & Sons
Page : 436 pages
File Size : 51,6 Mb
Release : 2018-03-02
Category : Technology & Engineering
ISBN : 9781119454823
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 : Carl J. Weisman
Publisher : Pearson Education
Page : 355 pages
File Size : 40,6 Mb
Release : 2002-01-11
Category : Computers
ISBN : 9780132441728
The only easy-to-understand guide to the wireless revolution! The easy-to-understand guide to the wireless revolution–fully updated for the latest technologies! New and expanded coverage: broadband fixed wireless, WLANs, wireless Internet, Bluetooth, smart antennas, and more Updated coverage of CDMA, GPS, LMDS, and WLL systems Concepts, terminology, components, and systems–plus new wireless glossary Perfect for marketers, investors, tech writers, PR specialists, and other non-engineers! There's a wireless revolution underway! With The Essential Guide to RF and Wireless, Second Edition, you can understand it, join it, and help drive it–even if you don't have a technical background. Leading consultant Carl J. Weisman has thoroughly updated this bestseller to reflect new market realities and breakthrough technologies–from wireless 802.11 LANs to broadband fixed wireless, and beyond. Mr. Weisman covers wireless at every level you need to understand: concepts, terminology, building blocks, and above all, how complete wireless systems actually work. Drawing on his extensive experience training sales professionals, he explains the essence of every key wireless/RF technology–clearly, comprehensibly, and with just the right touch of humor. Spread spectrum and CDMA: how they work and why they're important New! Detailed section on broadband fixed wireless: the new "last mile" solution for residential subscribers New! Satellite Internet delivery New! Smart antenna and superconducting filter technologies and their implications New! Wireless Internet, m-commerce, and Bluetooth Expanded! Global Positioning Systems: technologies and applications Updated! Preview the future of mobile telephony Updated! Wireless LANs and home networking From its all-new glossary to its extensive collection of charts, diagrams, and photographs, no other wireless/RF book is as accessible or as friendly! Whether you're a sales or marketing pro, customer, investor, tech writer, PR specialist, trade press writer, analyst, planner, or student, here's the up-to-the-minute briefing you've been searching for!
Author : National Research Council,Division on Earth and Life Studies,Commission on Life Sciences,Committee on the Biological Effects of Ionizing Radiation (BEIR V)
Publisher : National Academies
Page : 436 pages
File Size : 44,9 Mb
Release : 1990-02-01
Category : Science
ISBN : 9780309039956
This book reevaluates the health risks of ionizing radiation in light of data that have become available since the 1980 report on this subject was published. The data include new, much more reliable dose estimates for the A-bomb survivors, the results of an additional 14 years of follow-up of the survivors for cancer mortality, recent results of follow-up studies of persons irradiated for medical purposes, and results of relevant experiments with laboratory animals and cultured cells. It analyzes the data in terms of risk estimates for specific organs in relation to dose and time after exposure, and compares radiation effects between Japanese and Western populations.
Author : Jack Unger
Publisher : Cisco Press
Page : 360 pages
File Size : 41,9 Mb
Release : 2003
Category : Electronic books
ISBN : 1587050692
Best practices for planning and deployment of broadband WWANs Learn insider tips from an experienced wireless industry leader Understand the principles that underlie the operation of all wireless systems Learn how to provide profitable and reliable wireless Internet access Select the most effective equipment and antenna systems for your area Avoid common pitfalls encountered by new wireless network operators Minimize the effects of noise and interference on your network Enjoy the satisfaction of providing wireless Internet access to your community Practice the business principles used by successful wireless ISPs (WISPs) Use 802.11a, 802.11b, and 802.11g equipment more successfully in your own home, office, or outdoor environment Choose the right network architecture for your wireless network Conduct physical site surveys and radio-frequency (RF) site surveys License-free broadband wireless wide-area networks (WWANs) provide fast deployment of low-cost, high-speed "last-mile" wireless Internet access. License-free wireless technology delivers these benefits without requiring the use of products or services provided by local telephone or cable companies. WWANs enable Internet service providers (ISPs) and corporate IT managers to deploy their own cost-efficient broadband networks that deliver high-speed access for buildings and areas where traditional wired connectivity is either completely unavailable or is cost-prohibitive. Deploying License-Free Wireless Wide-Area Networksis the first book that provides complete, real-world "start-to-finish" design, installation, operation, and support information for wireless ISPs and other organizations deploying outdoor wireless WANs-including coverage of 802.11a, 802.11b, 802.11g, and proprietary-protocol networks. This vendor-neutral book covers all brands of broadband wireless equipment and explains the principles upon which all wireless equipment is based. Inside, you'll find step-by-step instructions and crystal-clear explanations that walk you through initial planning stages and onto full wireless network operation. End-of-chapter review questions reinforce important concepts. Whether you're an IT director, ISP engineer, network architect, or field technician,Deploying License-Free Wireless Wide-Area Networksis your essential reference. With practical, in-depth coverage of the real-world challenges of outdoor, license-free wireless WAN deployment, this book provides a comprehensive, vendor-neutral guide to successful wireless network design and operation.
Author : Devra Davis
Publisher : Penguin
Page : 233 pages
File Size : 44,9 Mb
Release : 2010-09-23
Category : Health & Fitness
ISBN : 9781101443484
"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 : John Rymell
Publisher : Lulu.com
Page : 134 pages
File Size : 40,7 Mb
Release : 2005-06
Category : Crafts & Hobbies
ISBN : 9781411618565
Amateur Radio is a pastime (or sometimes called Ham Radio) that can be enjoyed by young and old alike. It covers a wide range of activities including electronics, digital communications, and experimentation. The Amateur Radio Study Guide contains the notes used successfully in Amateur Radio License classes. These notes can be used in conjunction with the Question and Answer Pools supplied through the web links, as a learning path to obtaining your Amateur Radio License.
Author : Anonim
Publisher : American Radio Relay League
Page : 325 pages
File Size : 55,9 Mb
Release : 2024-06-30
Category : Electronic
ISBN : 9799072599963
Author : Daniel T. DeBaun,Ryan P. Debaun
Publisher : Icaro Publishing
Page : 0 pages
File Size : 43,7 Mb
Release : 2017-03-20
Category : Electromagnetic waves
ISBN : 0998199605
Discusses the hidden dangers and health concerns of electromagnetic frequency radiation that is emitted from technological devices that we use everyday and offers practical advice on how to protect yourself and your loved ones from harm.
