A set of points in IR n is said to be in acute position, if the angle determined by any triple of points is at most equal to =2. This paper considers the problem of computing the maximum circumradius of any set of n + 1 points in IR n that is in acute and general position and that has diameter one. It is shown that for n = 3, this maximum circumradius is at most equal to one. For arbitrary n, a...

Time-displaced conditional distribution functions are calculated for an infinite, one-dimensional mixture of equal-mass hard rods of different diameters. The kinetic equation that describes the time dependence of the one-particle total distribution function is found to be non-Markovian, in contrast with the situation in systems of identical rods. The correlation function does not contain any is...

A total of 74 clinical isolates of Branhamella catarrhalis were characterized with respect to their ampicillin, amoxicillin-clavulanate, cephalothin, cefaclor, erythromycin, tetracycline, chloramphenicol, and trimethoprim-sulfamethoxazole MICs and zones of inhibition. Disk diffusion tests were performed according to the guidelines of the National Committee for Clinical Laboratory Standards with...

In two previous papers, the electron was described in terms of a periodic structural model, namely a four-dimensional “helix” or “stationary wave” of spin 1⁄2 symmetry. That specific model generates most first-order properties of the electron as observed, and is stable in a Casimir sense where inward vacuum pressure balances outward inertial motion. It predicts a large electrical self-repulsion...

A simple method is described for the construction of electrode arrays consisting of insulated metal wires (33 microns diameter) spaced at small, equal distances (0.1 mm). No specialized instrumentation and techniques are needed, as only simple mechanical tools are sufficient. The electrode arrays are used for field potential recording from in vitro brain slice preparations.

In 40 patients with cirrhosis and oesophageal varices transmural variceal pressure was assessed endoscopically by fine needle puncture and related to endoscopic signs as well as to the severity of liver disease. Transmural pressure was significantly (p less than 0.01) higher in the presence of a red colour sign (26.7 (7.8) cm H2O) than in its absence (19.1 (6.6) cm H2O). Transmural pressure, ho...

Aims. We attempted to establish some guidelines for the selection of transmural stents during endoscopic drainage of PFCs by retrospective review of the clinical data obtained from three tertiary hospitals. Patients and Methods. Clinical data of 93 patients with attempted endoscopic drainage of symptomatic PFCs were obtained through chart review and prospective follow-up. Results. Treatment suc...

Having desired (to construct) a square, one is to take a cord of length equal to the (side of the) given square, make ties at both ends and mark it at its middle. The (east-west) line (equal to the cord) is drawn and a pole is fixed at its middle. The two ties (of the cord) are fixed in it (pole) and a circle is drawn with the mark (in the middle of the cord). Two poles are fixed at both ends o...

We describe the use of a transverse field RF surface coil that improves 1.5 T proton MR spectroscopy in the human calf. A 2-element figure-of-eight (FO8) transverse field RF surface coil (diameter 2R=10 cm; separation between the two linear current elements 2s=1cm) and a circular loop (CL) coil of equal diameter where built and tested with proton PRESS spectra at 1.5 T. The H PRESS spectra obta...

Let n and k be positive integers. The Kneser graph K n is the graph with vertex set [2n+k] and where two n-subsets A, B ∈ [2n+k] are joined by an edge if A∩B = ∅. In this note we show that the diameter of the Kneser graph K n is equal to d k e+1.