BACKGROUND AND PURPOSE The purpose of this study was to prospectively evaluate the effects of body position in patients with large supratentorial stroke. METHODS We performed 43 monitoring sessions in 18 patients with acute complete or subtotal middle cerebral artery (MCA) territory stroke. Intracranial pressure (ICP) was monitored with a parenchymal probe. Mean arterial blood pressure, ICP, ...

coronary artery was occluded for 15-min periods in closed-chest conscious dogs by inflating a balloon cuff previously implanted around the artery. The degree of myocardial ischemia was estimated by summating the S-T elevation recorded from 12 myocardial electrodes. Heart rate was increased by atropine or pacing and decreased by electrical stimulation of the vagus nerve. Hypotension was produced...

Changes in plasma potassium concentration after administration of depolarizing neuromuscular blockers were measured in patients during halothane-nitrous oxide anaesthesia. Suxamethonium 100 mg intravenously caused a peak rise of 0.55 m.equiv/1. and decamethonium 4 mg produced an elevation of similar magnitude. Injured patients had increases in potassium averaging 1.80 m.equiv/1. there being a d...

Characteristics of the temporal elevation of diastolic tension, produced by ischemia-reperfusion in isolated and paced Langendorff's hearts of guinea pigs, were studied. The elevation of diastolic tension corresponded with an elevation of left ventricular end diastolic pressure after a short ischemic period in the isovolumic heart. These phenomena were thought to be a result of incomplete relax...

Requirements for precise digital elevation data (i.e., Digital Elevation Models, or DEMs) of varying levels of detail are being formulated for different fields of application. The degree of detail found in a DEM is usually characterized by the horizontal sample spacing and by the vertical accuracy of the samples. Increased detail is normally associated with increased cost to the user, which fue...

A system to visualize and edit digital elevation models based on interferometric synthetic aperture radar data is presented. The visualization and exploration of digital elevation models has been traditionally achieved through the use of two-dimensional interfaces. As virtual reality interfaces have increasingly proven to offer a high degree of presentation realism and several interaction facil...

A system to visualize and edit digital elevation models based on interferometric synthetic aperture radar data is presented. The visualization and exploration of digital elevation models has been traditionally achieved through the use of two-dimensional interfaces. As virtual reality interfaces have increasingly proven to offer a high degree of presentation realism and several interaction facil...

There are two major freely available global digital elevation datasets, known as GTOPO30 and SRTM. To know the accuracies of those data in global scale, relative evaluation of these data and validation with global scale are performed. We compared elevation values of GTOPO30 and SRTM 30 arc second datasets globally and found there are places in the world with more than kilometres differences in ...

This paper presents a new algorithm for raising the degree of a B-spline curve which can also insert new knots at the same time. The new algorithm is faster than existing algorithms, and is much easier to understand and to implement. The new control points are computed using the following three simple steps: computing derivatives from control points, resampling the knot vector, and computing ne...

We present high resolution measurements of ammonia (NH3) and particle-ammonium (NH4 ) collected during the Pacific 2001 experiment at an urban, sub-urban and high elevation site. These data are used to conduct a detailed instrument inter-comparison and to characterize the sites. The data are interpreted with respect to; the degree to which the sites are representative, the degree of sensitivity...