Friday, June 29, 2007


More than 37,000 people have become LEED APs since US GREEN BUILDING COUNCIL launched the professional accreditation exam in 2001. LEED APs work in every sector of the building industry, and are recognized experts in green building practices and principles and the LEED Rating System.

USGBC offers the following exam tracks for earning the LEED AP credential:

LEED for New Construction, version 2.2
LEED for Commercial Interiors, version 2.0
LEED for Existing Buildings, version 2.0

You do not need to pass more than one exam track in order to become a LEED Accredited Professional. All LEED APs are eligible to earn one point towards certification under ID/IU Credit 2 by serving as a principal participant on a project team regardless of which exam track was achieved.

Tuesday, June 12, 2007

News from Berkely


The thinner - the better

This fiber can be used for the manufacture of more effective chemical sensors ,biochips ,protective clothing and other innovations .Electrospinning is the standard techniques used to manufacture the fiber but it create chaotic tangle rather than controlled patterns , so a varient technique called near field electrospinning is used. This technique offers full control over the path of nano fiber.

UC Berkeley mechanical engineering professor Liwei Lin’s continuous near-field electrospinning technique uses a needle with an inside diameter of 70 microns to supply the polymer solution. The diameter of the fiber produced currently ranges from 500 nanometers to 3 microns, thicker than with tip-based near-field electrospinning, but fibers can be any length.