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The Mosaic of Surface Charge in Contact Electrification

Science featured a groundbreaking new article in their June 26, 2011 issue. I highly recommend accessing the full study: The Mosaic of Surface Charge Contact Electrification. In the meantime, allow me to break down the basic components of this new principle in a way which is easy to understand whether or not you have a PhD in nanotechnology. First a definition: Kelvin force microscopy: a microscope which observes objects at the atomic level by measuring the interaction between the probe tip and the surface. Rubbing materials together under the Kelvin force microscopy lens, researchers discovered that charges don't transfer uniformly. In other words, any given material is neither positively nor is it negatively charged. Every material has both charges. Picture a very large checkerboard, rather than having a patterned surface of black then white then black, the surfaces of materials have a jumbled mishmash of squares falling in no predictable order.

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Standard Test Method for Determining Relative Humidity in Concrete Floor Slabs Using in situ Probes

Designation: F 2170 – 02 Standard Test Method for Determining Relative Humidity in Concrete Floor Slabs Using in situ Probes1 This standard is issued under the fixed designation F 2170; the number immediately following the designation indicates the year of Original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A superscript epsilon (e) indicates an editorial change since the last revision or reapproval.

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Contemplating whether to install static free flooring over bare concrete or over raised access flooring?

This Cisco Press Book excerpt outlines the benefits and drawbacks of running power, data connections, and cooling into the Data Center by way of the ceiling versus installing a raised floor system and routing it underneath. The artilce details the components involved and offers sample illustrations for both overhead and under-floor systems as well as provides common problems to watch for and avoid.

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Avoiding Flooring Failure—Insist on Moisture Testing

NOTE: THIS ARTICLE IS NO LONGER ON THE AUTHOR'S SITE. SHOULD IT BE DELETED? The five main ingredients to ensuring a successful floor installation.


Reducing Bond Failures Caused by Moisture Vapor Transmission

Special considerations to prevent failure.

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Vapor Barriers under Concrete Floor Slabs: Friend or Foe?

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Calcium Chloride v. In-situ Relative Humidity

Which moisture test method is better? Here’s what one moisture expert has to say.

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