Audit report on the City of Robins, Iowa for the year ended June 30, 2008

Audit report on the City of Robins, Iowa for the year ended June 30, 2008

Audit report on the City of Central City, Iowa for the year ended June 30, 2008

Audit report on the City of Central City, Iowa for the year ended June 30, 2008

Audit report on the City of Maxwell, Iowa for the year ended June 30, 2008

Audit report on the City of Maxwell, Iowa for the year ended June 30, 2008

Audit report on the City of Anita, Iowa for the year ended June 30, 2008

Audit report on the City of Anita, Iowa for the year ended June 30, 2008

Multiple city

Concurs d'idees per a l'ordenació de l'àmbit sector 'Eixample Nord' al terme municipal de Vilanova i la Geltrú

Reaudit report on the City of St. Charles, Iowa for the period July 1, 2005 through June 30, 2006

Reaudit report on the City of St. Charles, Iowa for the period July 1, 2005 through June 30, 2006

Audit report on the City of Murray, Iowa for the year ended June 30, 2009

Audit report on the City of Murray, Iowa for the year ended June 30, 2009

Compilation report on the City of Sabula, Iowa, for the six months ended December 31, 2008 and the year ended June 30, 2008

Compilation report on the City of Sabula, Iowa, for the six months ended December 31, 2008 and the year ended June 30, 2008

Audit report on the City of Denison, Iowa for the year ended June 30, 2009

Audit report on the City of Denison, Iowa for the year ended June 30, 2009

Audit report on the City of Knoxville, Iowa for the year ended June 30, 2009

Audit report on the City of Knoxville, Iowa for the year ended June 30, 2009

Audit report on the City of Armstrong, Iowa for the year ended June 30, 2009

Audit report on the City of Armstrong, Iowa for the year ended June 30, 2009

Audit report on the City of Le Grand, Iowa for the year ended June 30, 2009

Audit report on the City of Le Grand, Iowa for the year ended June 30, 2009

Audit report on the City of Elkhart, Iowa for the year ended June 30, 2009

Audit report on the City of Elkhart, Iowa for the year ended June 30, 2009

Reaudit letter to the City of Ottumwa for the period July 1, 2005 through June 30, 2006, as well as certain issues applicable to the year ended June 30, 2005 and subsequent periods

Reaudit letter to the City of Ottumwa for the period July 1, 2005 through June 30, 2006, as well as certain issues applicable to the year ended June 30, 2005 and subsequent periods

A noninvasive method for measuring the velocity of diffuse hydrothermal flow by tracking moving refractive index anomalies

Diffuse flow velocimetry (DFV) is introduced as a new, noninvasive, optical technique for measuring the velocity of diffuse hydrothermal flow. The technique uses images of a motionless, random medium (e.g.,rocks) obtained through the lens of a moving refraction index anomaly (e.g., a hot upwelling). The method works in two stages. First, the changes in apparent background deformation are calculated using particle image velocimetry (PIV). The deformation vectors are determined by a cross correlation of pixel intensities across consecutive images. Second, the 2-D velocity field is calculated by cross correlating the deformation vectors between consecutive PIV calculations. The accuracy of the method is tested with laboratory and numerical experiments of a laminar, axisymmetric plume in fluids with both constant and temperaturedependent viscosity. Results show that average RMS errors are ∼5%–7% and are most accurate in regions of pervasive apparent background deformation which is commonly encountered in regions of diffuse hydrothermal flow. The method is applied to a 25 s video sequence of diffuse flow from a small fracture captured during the Bathyluck’09 cruise to the Lucky Strike hydrothermal field (September 2009). The velocities of the ∼10°C–15°C effluent reach ∼5.5 cm/s, in strong agreement with previous measurements of diffuse flow. DFV is found to be most accurate for approximately 2‐D flows where background objects have a small spatial scale, such as sand or gravel