Characterizing the mechanical properties of materials and biological systems at the nanoscale requires accurate measurement of forces on the order of 10’s of μN and less. Many times custom fabricated MEMS actuators and load cells are employed to apply these forces. Force response of these devices may be very different from their anticipated response due to fabrication induced effects. This make...

The aim of this work is to present the AC-DC transfer calibration system of Voltage and Current Laboratory (Latce) of brazilian's Instituto Nacional de Metrologia, Normalização e Qualidade Industrial (Inmetro). Latce is responsible for the realizations of both the volt and the ampère in accordance to SI, and for it's dissemination through the network of accredited laboratories in Brazil, so as ...

A simplified wet-ashing technique is described for the determination of chelated iron in the urine, with special reference to DTPA-bound iron. The procedure dispenses with the need for quantitative transfer, and gives corresponding economy in time, labour, and glassware without loss of precision. The standard error of the mean estimate of a triplicate determination, using four reference standar...

The Dimensional Metrology Group, and its predecessors at the National Institute of Standards and Technology (formerly the National Bureau of Standards) have been involved in documenting the science of gauge block calibration almost continuously since the seminal work of Peters and Boyd in 1926 [1]. Unfortunately, most of this documentation has been in the form of reports and other internal docu...