Russell Kay

Contributing Writer


4G Wireless

4G wireless technologies, which include mobile WiMax and LTE, provide high-speed transmission for streaming video and other applications.

Flash Memory

Here's the technology behind USB sticks and solid-state drives -- with an explanation of why it's called "flash."

QuickStudy: Drupal

Drupal is free content-management software designed to let an individual or user group publish, manage and organize Web sites that feature a wide variety of content. Drupal is currently being used to power community Web portals,...


Drupal is an open-source Web content management system written in PHP. It serves as the back-end system for many different types of Web sites, ranging from personal blogs to corporate collaboration applications and government sites.

My Cell Phone Won't Connect

Cell phones have limited range and rely heavily on the cellular network to make a connection. If you leave your carrier's covered area, you won't be able to connect -- unless you have access to an alternate communications method.


QuickStudy: Extensible Business Reporting Language (XBRL)

XBRL is a version of XML defined to meet the requirements of business and financial information. With XBRL, unique identifying tags are applied to financial data items.More than simple identifiers, these tags provide a range of...

XBRL Extensible Business Reporting Language

The SEC has mandated the use of XBRL for financial reporting. Heres how it works.

Mesh Networks

A mesh network is a LAN (usually wireless) where each node is connected to many others, configured to allow connections to be rerouted around broken or blocked paths, with the signal hopping from node to node until it reaches its...


Emulation or Virtualization?

Emulation is what we do when we try to make one system behave like or imitate a different system. We want to take System A (something we already have) and give it the inputs we would normally use for System B (which we may not have)...

Emulation or Virtualization?

Don't be confused. Virtualization and emulation aren't the same thing. Here we sort out the differences.

The Smart Grid

The Department of Energy has called the U.S. electrical power grid the largest machine on Earth. It has over 9,200 generating units that produce more than 1 million megawatts of electricity. And they're connected to a network with...

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