The views expressed in the paper do not necessarily reflect the views of the Bureau of Economics or the Department of Commerce. Introduction There has been a great deal of recent attention directed to the importance of investments in intangibles in the growth of economies. The Bureau of Economic Analysis in 2006 and 2007 released R&D Satellite Accounts that illustrate how the incorporation of R...

porous media has interesting features in compared with free flame combustion due to the extended of the lean flammability limits and lower emissions. advanced new generation of internal combustion (ic) engines are expected to have far better emissions levels both gaseous and particulate matter, at the same time having far lower fuel consumption on a wide range of operating condition. these crit...

Horizontal rotational head movements were video-taped from pigeons standing freely in a rotating cylinder. The cylinder carried vertically striped patterns approximating a sinusoidally modulated horizontal intensity distribution. We altered systematically various stimulus parameters: spatial wavelength and contrast of the pattern, angular velocity of the pattern motion and mode of motion onset....