Transparency tube provides reliable water-quality measurements

Transparency tube provides reliable water-quality measurements

Grading improves transparency and quality.

The objection of Dr. Tobin to evidence-based medicine in a recent issue of CHEST (May 2008)1,2 seems to focus on the grading of recommendations. As Deputy Editor of a popular clinical resource, I have personally graded 100 recommendations using the Grading Recommendations Assessment, Development, and Evaluation (GRADE) system and feel well qualified to comment on its benefits.3 Grading improves...

Reliable Mine Water Technology

Mine planning, permitting and operation require reliable water technology in all its aspects: water inflow, water use, water disposal and discharge, and water impact. Mine water evaluations are relied upon by mining companies, mine regulators and the public to determine whether the mine is technically feasible, optimally designed, financially sound, socially acceptable, and environmentally beni...

Applying adaptive prediction to sea-water quality measurements

This study explores the possibility of using adaptive filters to predict sea-water quality indicators such as water temperature, pH and dissolved oxygen based on measurements produced by an under-water measurement set-up. Two alternative adaptive approaches are tested, namely a projection algorithm and a least squares algorithm. These algorithms were chosen for comparison because they are widel...

Planar REDOX and Conductivity Sensors for ISS Water Quality Measurements

Bare-metal based REDOX and conductivity sensors that are used to detect ionic species in solution by measuring the electrochemical cell current as the voltage is scanned. The simplicity and robustness of these sensors allows their use in the analysis of ionic species found in natural and drinking water. The measurements include 1) conductivity measurements which provide a gross indication of th...