Are you keeping safe? Electrical wiring and appliances, overhead power lines, machinery, photocopiers, mobiles and cordless telephones, radio masts, TVs, tube trains, x-rays and laser beams are amongst the hundreds of everyday items that are now known to give off high levels of microwave radiation. Electromagnetic fields (EMFs) can be biologically active and capable of making changes to the structure of human and animal cells which are exposed to them. Long-term exposure is believed by an increasing number of scientists and environmentalists to be connected to tumours, fertility problems, behaviour and mood changes, concentration and memory loss, and also to affect melatonin production and impair our immune system repair mechanisms. The Powerwatch Handbook is a simple no-nonsense guide to EMFs and how to reduce their harmful effect. Alasdair and Jean Philips present their information in a practical, positive and lively way, in an easy-to-follow handbook style. EMF levels are graded using a star rating system, high level items are highlighted, and practical tips given in step-by-step, bullet point form.

The largest, most comprehensive and colorful guide to salt and pepper shakers ever published! A companion volume to The Complete Cookie Jar Book, published in 1991. The Complete Salt and Pepper Shaker Book shows more than 1600 sets of figural shakers in full color. The collection includes those by American potteries such as Rosemeade and Ceramic Arts Studio that have never appeared in a book before. Company histories, measurements of shakers, and pictures of marks and paper labels are among the book's innovative features. As some salt and pepper shakers currently attract hundreds of dollars, this book is a must for collectors, dealers, and appraisers. Look inside, even if you have never held an interest in salt and pepper shakers before, and this book will open your eyes to a wonderful collectible. A price guide is included.

Publisher's Note: Products purchased from Third Party sellers are not guaranteed by the publisher for quality, authenticity, or access to any online entitlements included with the product. THE DEFINITIVE GUIDE TO EPON Written by one of the authors of the IEEE802.3ah standard, this is the first book to fully explain the EPON architecture, analyze its performance, and annotate the standard. Clearly addressing efficiency, performance, and implementation issues, Ethernet Passive Optical Networks provides valuable, annotated insights into all engineering-critical EPON topics, including: PON enabling technologies Point-to-point emulation Multi-point control protocol Error correction Performance analysis Discovery optimizations Quality of service in EPON Fairness vs. efficiency There is no more expert or complete guide to understanding the performance and architectural complexities of EPON than Ethernet Passive Optical Networks. Inside Ethernet Passive Optical Networks: Part I: Overview of Access Network Architectures * Introduction * Overview of PON Enabling Technologies * Access Network Architectures Based on TDMA PON * Emergence of Ethernet PON Part II: EPON Architecture* EPON Overview * Logical Topology Emulation * Laser Control Function * Multi-Point Control Protocol: A Formal Specification * Forward Error CorrectionPart III: System-Level Issues * EPON Encryption Mechanism * Path Protection in EPON Part IV: EPON Performance Baseline Efficiency * Discovery Slot Allocation * EPON with Static Slot Assignment * EPON with Dynamic Slot Assignment * Support for Differentiated Classes of Service * Objectives of EPON Scheduling Algorithm * Cousin-Fair Hierarchical Scheduling in EPON * Conclusion

SWITCH ON YOUR UNDERSTANDING OF DIGITAL ELECTRONICS!.

. Now anyone can gain a deeper understanding of digital electronics -- without formal training, unlimited time, or a genius IQ. In "Digital Electronics Demystified," electronics expert and author Myke Predko provides a totally painless way to learn enough digital logic and electronics to build your own projects!.

. With "Digital Electronics Demystified," you master the subject one simple step at a time -- at your own speed. This unique guide offers problems at the end of each chapter and section to pinpoint weaknesses, and a 100-question final exam to reinforce the entire book..

. This entertaining self-teaching course makes it fun and easy to learn digital electronics fast.. Get ready to: . Learn the ins and outs of CMOS logic, Programmable Logic Devices, and microprocessor/microcontroller interfacing. Rub shoulders with MML (Mickey Mouse Logic), semiconductor chips, timing devices, and other digital phenomena. Understand how computers "think." Cease shying away from feedback circuits. Build digital projects for less than $10. Create a marketable product. Rate your progress with questions and quizzes.

. So if you're looking for an enjoyable route into digital logic and electronics, let "Digital Electronics Demystified" be your shortcut!. . . .

Publisher's Note: Products purchased from Third Party sellers are not guaranteed by the publisher for quality, authenticity, or access to any online entitlements included with the product. DEVELOP THE MECHATRONIC SIDE OF YOUR GENIUS WITH 25 FUNTASTIC PROJECTS! If you're fascinated by electronics and mechanics, this hands-on tour of the junction where they meet will bring you hours of fun and learning. Noted electronics author Newton Braga's Mechatronics for the Evil Genius guides you step by step through 25 complete, intriguing, yet inexpensive projects developed especially for this book. You will build your own mechanical race car, combat robot, ionic motor, mechatronic head, light beam remote control, and 20 other entertaining learning projects that take you to the heart of mechatronics. More than just hours of entertainment, these stimulating projects provide a solid grounding in mechatronics, the discipline at the core of robotics where electronics, mechanics, and other sciences merge. Each experiment builds on those before it so you develop a hands-on, practical understanding of mechatronics. You don't need to know electronics or mechanics to get started. But by the end, you'll be showing off your own exciting projects! MECHATRONICS FOR THE EVIL GENIUS: Introduces you to mechatronics step-by-step -- you don't need to be a electromechanical whiz to get started, but you will be when you're finished Teaches all the skills you need for the projects, including how to solder, recognize components, and read schematics Provides complete lists of tools and parts -- all of them inexpensive and easily obtained Vividly explains the mechanics, electronics, and science underlying each project Gives you fully illustrated,step-by-step directions that build your skills, one small increment at a time Provides directions for 25 tantalizing projects, including a robotic arm, an electronic cannon, a coin tosser, an analog computer, and many more Helps you develop skills you can bring to other hobby projects, such as more sophisticated robots Encourages you to improvise with secondary components to devise your own unique creations Suggests related activities for customization and going steps beyond