TIROS photographs of cloud patterns in the vicinity of thc jet stream are examined and comparcd with surface, uppcr air, and pilot-report data. It is found that with certain conditions of lighting and satellite attitude the northern edge of the cirrus cloud shield, which lics immediately south of the jet, can be casily identified by a shadow cast by the higher cloud dcek on the lon-er underlyin...

BACKGROUND AND OBJECTIVE The Difficult Airway Society protocol for the 'can't intubate, can't ventilate' scenario recommends the use of kink-resistant cannula cricothyroidotomy with transtracheal jet ventilation or surgical cricothyroidotomy. This survey aimed to assess the preparedness of anaesthetists and anaesthetic assistants for emergency tracheal access. METHODS Ninety-seven anaesthetis...

The response of anunderexpanded jet to adepletingfinite reservoir is examinedwith experiments and simulations. An open-ended shock-tube facility with a variable reservoir length is used to obtain images of nitrogenand heliumjet structures at successive instances during the blowdown from initial pressure ratios of up to 250. The reservoir and ambient pressures are simultaneously measured to obta...

We report on VLBI observations of M81 * , the nuclear core-jet source of the spiral galaxy M81, at five different frequencies between 1.7 and 14.8 GHz. By phase referencing to supernova 1993J we can accurately locate the emission region of M81 * in the galaxy's reference frame. Although the emission region's size decreases with increasing frequency while the brightness peak moves to the southwe...

The features of the data acquisition and control systems of the NASA Langley Research Cen-ter's Jet Noise Laboratory are presented. The Jet Noise Laboratory is a facility that simulates realistic mixed ow turbofan jet engine nozzle exhaust systems in simulated ight. The system is capable of acquiring data for a complete take-oo assessment of noise and nozzle performance. This paper describes th...

The impact of several land surface models (LSMs) and microphysics (MP), planetary boundary layer (PBL), schemes on the accuracy simulated brightness temperatures (BTs) from water vapor (WV) sensitive bands was examined via comparison with observations GOES-16 Advanced Baseline Imager. Nine parameterization configurations were evaluated. Analysis revealed that, compared to Thompson MP scheme, Na...

[1] The motion of mid-latitude surface cyclones relative to the jet streams is of particular interest because of the commonly observed strong and rapid deepening they undergo when they cross the upper-level jet axis. The purpose of the present study is to validate a recent theory that may explain this motion which is a generalization of the so-called beta drift in the mid-latitude baroclinic co...

Ejectors have been widely used in many applications such as water desalination, steam turbine power generation, refrigeration systems, and chemical plants. The advantage of an ejector system lies in its extremely reliable and stable operation due to the complete absence of moving parts. However, the performance depends on a number of factors, among which the flow channel configuration/arrangeme...