Some results from a procedure for optimising the geometrical parameters of a refrigeration twin screw compressor, such as the basic geometrical parameters of its profile and the position of its discharge port etc., were presented by the authors at the International Compressor Engineering Conference at Purdue, 1992. In this paper the optimisation technique is developed by making use of programs ...

We describe the geometrical properties of solid's shadows projected onto a flat plane by point-light sources. Even though the shape and position of each element are arbitrary and unknown, we indicate that there exists a certain constraint between three shadows on the plane; i.e., three cross points determined by pairs of tangential lines must sit on a straight line. This property is considered ...

UNLABELLED Cochlear implantation has been recommended for children under 24 months of age. The use of objective measures is needed to help speech processor programming. The electrically evoked compound potential (EAP), which can be assessed by neural response telemetry (NRT), is one of those objective measures. AIM to determine how often the EAP can be recorded by NRT system during surgery an...

For restoration of neuro-muscular functions in disabled people, cuff type electrodes have been used for several 10 years. A lot of experiences were collected using 12polar electrodes, which consisted of silicone tubes, carrying 4 stimulation tripoles, each tripole orientated longitudinally to the nerve. The tripoles were at 0°, 90°, 180°, and 270° position around the nerve. It is obvious that t...

Three possible determinants of typicality were examined in categories of common household objects: family resemblance and an exemplar’s similarity to a geometrical centroid of the category, either unweighted or weighted for name frequencies. Similarity to the geometrical centroids in 2to 6-dimensional spaces outperformed family resemblance in predicting typicality. Finally, optimizing the predi...

This paper improves previous work on the Kalman Filter based estimation of geometrical parameters (positions, orientations and dimensions) of polyhedral objects in contact during a force-controlled compliant motion task. Following improvements are achieved: (i) the derivation of the estimation equations is considerably simplified; (ii) the set of position closure constraints is minimized; (iii)...

wet ag/agcl electrodes, although very popular in clinical diagnosis, are not appropriate for expanding applications of wearable biopotential recording systems which are used repetitively and for a long time. here, the development of a low‑cost and low‑noise active dry electrode is presented. the performance of the new electrodes was assessed for recording electrocardiogram (ecg) and electroence...

Position sensitivity in semiconductor detectors of ionizing radiation is usually achieved by the segmentation of the sensing diode junction in many small sensing elements read out separately as in the case of conventional microstrips and pixel detectors. Alternatively, position sensitivity can be obtained by splitting the ionization signal collected by one single electrode amongst more than one...

OBJECTIVE This study aimed to define a spatial position of the cochlea in the skull based on anatomical studies and to design an appropriate method of skull radiography for demonstration of the multichannel intracochlear electrode array and the structures of the inner ear, for use in evaluating the electrode position and its related pitch perception. BACKGROUND The conventional skull radiogra...

We have studied the rectified current in a geometrically symmetric nano-electromechanical shuttle with periodic kicks and sinusoidal ac bias voltages. The is exactly zero under geometrical symmetry which generated by electrons transferred from source to drain electrodes through movable shuttle. investigate nonzero currents regular motion of time-translational broken. shuttle, moreover, becomes ...