Abstract: A method detects improper positioning of a vehicle on a weight scale, especially improper transverse positioning. A weight scale for weighing a multi-axle vehicle has a weighing platform, with a weighing area having a length and a width, for simultaneous placement of the plurality of axles on the weight platform. A portion of the weight of the multi-axle vehicle is sensed in at least one load cell upon which the weighing platform bears. A resulting output signal from each load cell is transmitted. An at least partial vehicle weight waveform of vehicle weight as a function of time, based on the at least one load cell output signal is generated. A weighment of the vehicle is rejected if the generated vehicle weight waveform indicates that at least some portion of the vehicle was improperly positioned outside the weighing area.

Abstract: Disclosed herein are devices and methods for measuring the effect of chemokines and electric fields on cell migration. This approach is inherently non-contact and does not require injection of current. For example, disclosed herein is a device for assessing cell migration that comprises a cell migration chamber and an electromagnet positioned to produce a uniform electric field across the length of the chamber. Also disclosed is a method for assaying a cell that involves loading cells into the disclosed device along with a chemokine in an amount to produce a chemokine gradient, activating the electromagnet to produce an electric field across the cell migration chamber, and imaging the cells to measure the dual effect of the chemokine and the electric field on the cells.