OBJECTIVE To determine the oxygen outflow delivered by seven different models of manually operated self-inflating resuscitation bags (with and without an oxygen reservoir connected), which were tested using different oxygen supply rates without manipulating the bag, by simulating their use in patients breathing spontaneously. METHODS The oxygen outflow was measured using a wall oxygen flow me...

We report on XMM-Newton spectroscopic observations of the luminous, radio-quiet quasar PDS 456. The hard X-ray spectrum of PDS 456 shows a deep absorption trough (constituting 50% of the continuum) at energies above 7 keV in the quasar rest frame, which can be attributed to a series of blue-shifted K-shell absorption edges due to highly ionized iron. The higher resolution soft X-ray RGS spectru...

Though widely observed to be emanating from a variety of astrophysical sources, the underlying physical mechanism behind the formation of galactic and extragalactic outflows is still enshrouded in a veil of mystery. In addition, it has not been possible to calculate accurately the amount of matter expelled in these events. In this article we present a non-self-similar analytical model, which, f...

When newer tables for parameters in Grant's formula for tonography are used, one obtains far higher values for the outflow facility than those generally accepted. The aim of this iinvestigation has, therefore, been to test the validity of the tonography formula. The outflow facility determined by constant-rate perfusion in enucleated eyes has been compared with the results of tonography on the ...

We present a study of molecular outflows using high-resolution mapping of the CO (1-0) line emission toward eight relatively nearby 6.7 GHz methanol masers, which are associated with massive star forming regions. Outflows were detected in seven out of eight sources, and five of them clearly show bipolar or multiple outflow morphologies. These outflows have typical masses of a few solar masses, ...

Using full general relativistic calculations, we investigate the possibility of generation of mass outflow from spherical accretion onto non-rotating black holes. Introducing a relativistic hadronic-pressure-supported steady, standing, spherically-symmetric shock surface around a Schwarzschild black hole as the effective physical barrier that may be responsible for the generation of spherical w...

High velocity outflows from supermassive black holes have been invoked to explain the recent identification of strong absorption features in the hard X-ray spectra of several quasars. Here, Monte Carlo radiative transfer calculations are performed to synthesise X-ray spectra from models of such flows. It is found that simple, parametric bi-conical outflow models with plausible choices for the w...

IN the past few years there has been increasing interest in the use of the pressure cup technique for the investigation of aqueous humour dynamics. Rosengren (1956) demonstrated a rise of intra-ocular pressure when a positive pressure was applied to the sclera overlying Schlemm's canal. He suggested that this rise of pressure was due to continued formation and accumulation of aqueous humour, th...

We present new ATCA 17and 24-GHz radio images and ESO-NTT optical spectra of the radioloud Seyfert galaxy IC 5063, the first galaxy in which a fast (∼ 600 km s) outflow of neutral hydrogen was discovered. The new radio data confirm the triple radio structure with a central, unresolved flat-spectrum core and two resolved radio lobes with steep spectral index. This implies that the previously det...