Wireless Communication in Underground Mines: RFID-based Sensor Networking (Repost)

Wireless Communication in Underground Mines: RFID-based Sensor Networking
Publisher: Springer | pages: 477 | 2009 | ISBN: 0387981640 | PDF | 12,6 mb
Underground mines require fool-proof, mine-wide communication systems for smooth functioning of mine production and worker safety. Proper and reliable communication systems not only decrease machine break down time, but more importantly provide immediate transmission of messages from the underground working area to the surface for normal mining operations as well as necessary rescue operations in case of disaster. Therefore, a reliable and effective communication system is an essential requisite for safe working, and maintaining the requisite production and productivity of underground mines. Existing wired communication systems cannot reach parts of complex mines, and are ineffective in many disaster situations.

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Wireless Security know it all

Praphul Chandra, Alan Bensky, Tony Bradley, Chris Hurley and oth., "Wireless Security: Know It All"

Newnes | 2008 | ISBN: 1856175294 | 752 pages | PDF | 6,2 MB

The Newnes Know It All Series takes the best of what our authors have written to create hard-working desk references that will be an engineer's first port of call for key information, design techniques and rules of thumb. Guaranteed not to gather dust on a shelf!A 360-degree view from our best-selling authorsHot topics coveredThe ultimate hard-working desk reference; all the essential information, techniques and tricks of the trade in one volumeSummary: Excellent Book. Most comprensive one I've seen so farRating: 5This is an excellent book. I first used this book to secure my home network and then I lent it to my IT dept at work and we had a fully functional fully secure wireless network up in a week!At over 700 pages this book is a compendium of Information on Wireless technologies as well as wireless Security and is a collaboration between 11 authors.Information is well organized and there are plenty of tables and figures which makes the information easy to understand. Most books stick to either theoretical aspects or practical aspects and very rarely both. This one manages to bridge the gap. It features a comprehensive tutorial on wireless technology, from Radio communications as well as architecture perspectives. Then covers security and then there are plenty of practical step-by configuration examples.There is an entire chapter devoted to implementing basic security features on leading name brand Wireless routers and another for advanced features. Home Network security, as well as other wireless technologies such as Bluetooth, Zigbee abd RFID are also comprehensively covered.There is also a complete appendix at the end with templates for all the policy and process related aspects of any wireless security policy.Whether you are an advanced home networking enthusiast or a CIO or some other IT related professional entrusted with implementing Security Policies for both fixed and Wireless networks, Then this book is a must read for you.

http://hotfile.com/dl/85669856/bdc07b7/Wireless_Security_know_it_all.rar.html 

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Linear CMOS RF Power Amplifiers for Wireless Applications: Efficiency Enhancement and Frequency-Tunable Capability (re)

Paulo Augusto Dal Fabbro, Maher Kayal, "Linear CMOS RF Power Amplifiers for Wireless Applications: Efficiency Enhancement and Frequency-Tunable Capability"
Sp/ger | 2010 | ISBN: 9048193605 | 220 pages | PDF | 3,7 MB
The RF power amplifier is a key component in a wireless transceiver and is considered by many as the design bottleneck in the transmitting chain. Linear CMOS RF Power Amplifiers for Wireless Applications addresses two fundamental aspects in RF power amplifier design for integration in CMOS technologies at 2.4, 3.7 and 5.2 GHz: efficiency enhancement and frequency agility.
The well-known linearity–efficiency trade-off is circumvented by employing an efficiency-enhancement technique called the dynamic supply RF power amplifier. The design of this system is described with great detail and compared with other efficiency enhancement techniques.
The frequency agility is achieved with a novel impedance matching network based on coupled inductors. The design of a dual-band RF power amplifier is shown, with a careful analysis of the tunable matching network and its interaction with the rest of the circuit.
The considerations and conclusions drawn throughout this book are based on simulation as well as measurement results from the integrated circuit prototypes carefully built and respecting best practices in RF design.

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