We present the opinion of some authors who believe there is no force between a stationary charge and a stationary resistive wire carrying a constant current. We show that this force is different from zero and present its main components: the force due to the charges induced in the wire by the test charge and a force proportional to the current in the resistive wire. We also discuss briefly a component of the force proportional to the square of the current (...) which should exist according to some models and another component due to the acceleration of the conduction electrons in a curved wire carrying a dc current (centripetal acceleration). Finally, we analyze experiments showing the existence of the electric field proportional to the current in resistive wires. (shrink)

In electrical resistance tomography technology for human lung, under the same experimental conditions, the width of the sensitive field boundary electrode has a significant impact on the calculation accuracy of the inverse problem besides the finite element model topology. Aiming to improve the quality of reconstructed images, the FEM for human lung was set up based on prior knowledge. On this basis, the electrode width of the FEM was optimised by comparing the morbidity degrees of the sensitivity matrix (...) and Hessian matrix, the uniformity of sensitivity distribution, and the quality of reconstructed images, which can improve the accuracy of solving the inverse problem significantly. (shrink)

Skin as cover: the discursive effects of 'covering' metaphors on wound care practicesThis paper outlines a Foucauldian analysis of interactions between nurses and patients during wound care procedures in a burns unit. It explores the use of Kristeva's psychoanalytic concepts of abjection and the abject body to illuminate the emotional affects of wounds on nurse and patient. In this process, I identify how cultural metaphoric understandings about skin influence and organise the care of burns patients. Such analysis suggests (...) the import of the complete skin, the medical scientific control over the definition of this work, and the emotional forces that resist such control. (shrink)