Abstract The contribution of soot aerosols to radiative forcing and climate change depends on their optical properties. Since these are agglomerates composed quasi-spherical primary particles (usually small with respect the radiation wavelength), properties can be calculated following Rayleigh-Debye-Gans approximation, which considers as independent absorbers scatterers, corrections made accoun...

The Sound attenuation and dispersion in saturated gas-vapor-droplet mixtures with evaporation has been investigated theoretically. The theory is based on an extension of the work of Davidson (1975) to accommodate the effects of transpiration on the linear particle relaxation processes of mass, momentum and energy transfer. It is shown that the inclusion of transpiration in the presence of mass ...

results: “Regarding girls, only for the entire sample, these is a secular decrease in the duration of physical inactivity”: This is unclear: girls versus entire sample? • This has now been amended. This sentence has now been clarified (pp. 2-3). Abstract: conclusions: younger cohort (1998-2000): should this not be (2008-2010)? • This has now been amended (p. 3, Line 7). conclusions: younger coh...

Interest in tomosynthesis and its clinical applications has been revived by recent advances in digital X-ray detector technology. Conventional tomography technology provides planar information of an object from its projection images. In tomography, an X-ray tube and X-ray film receptor are positioned on either side of the object. The relative motion of the tube and film is predetermined based o...

Second in a two-part series comparing measurement techniques for the assessment of basic image quality metrics in digital radiography, in this paper we focus on the measurement of the image noise power spectrum (NPS). Three methods were considered: (1) a method published by Dobbins et al. [Med. Phys. 22, 1581-1593 (1995)], (2) a method published by Samei et al. [Med. Phys. 30, 608-622 (2003)], ...

M. Liepe , S. Belomestnykh, J. Dobbins, R. Kaplan, C. Strohman, LEPP, Cornell University, Ithaca, NY 14853, USA Abstract Recent progress in developing digital low-level RF controls for accelerators has made digital systems an option of choice. At Cornell we are presently working on two projects: upgrading the RF controls of the Cornell Electron Storage Ring (CESR) for charm-tau operation (CESR-...

1. De Meirleir K, Suhadolnik RJ, Lebleu B, Englebienne P. Antiviral pathway activation in chronic fatigue syndrome and acute infection [letter]. Clin Infect Dis 2002; 34:1420–1 (in this issue). 2. Gow JW, Simpson K, Behan PO, Chaudhuri A, McKay IC, Behan WMH. Antiviral pathway activation in patients with chronic fatigue syndrome and acute infection. Clin Infect Dis 2001; 33:2080–1. 3. Fukuda K,...

We propose a language for designing image measurement operators suitable for early vision. We refer to them as logical/linear (L/L) operators, since they unify aspects of linear operator theory and boolean logic. A family of these operators appropriate for measuring the low-order diierential structure of image curves is developed. These L/L operators are derived by decomposing a linear model in...

The Bologna process in Poland, as in Central Europe generally, was seen prior to the EU enlargement in 2004 as an effective avenue to integrate Polish universities with their Western European counterparts. Poland was among the initial signatory countries of the Bologna Declaration in 1999. In post-communist Europe, the Bologna process was often viewed as “a political option aiming at ingraining...

We report a large set of 295 interfacial carbon dioxide (CO2) flux measurements obtained in the Scheldt estuary in November 2002 and April 2003, using the floating chamber method. From concomitant measurements of the air-water CO2 gradient, we computed the gas transfer velocity of CO2. The gas transfer velocity is well correlated to wind speed and a simple linear regression function gives the m...