Results 11 to 20 of about 3,264,377 (259)
High Frequency Ventilation [PDF]
Pediatric Clinics of North America, 1987 High frequency ventilation (HFV) presents a new respiratory therapy modality that has taught us much about the theories of gas transport in the lung. Both experimental and clinical applications are summarized. Although the future clinical role of HFV remains uncertain, pediatric applications and investigation continue at the forefront of this new ...
R C, Wetzel, F R, Gioia
+14 more sources
High-Frequency Ventilation [PDF]
Anaesthesia and Intensive Care, 1986 Over the last six years high-frequency ventilation has been extensively evaluated both in the clinical and laboratory settings. It is now no longer the great mystery it once was, and it is now no longer believed (as many had hoped), that it will solve all the problems associated with mechanical pulmonary ventilation.
M F, Babinski, R B, Smith
openaire +4 more sources
High Frequency Audiometry [PDF]
Annals of Otology, Rhinology & Laryngology, 1984 After a brief discussion of the past use of and clinical need for high frequency hearing tests, a new technique is described that uses a special electric transduction mode: a 60-kHz carrier frequency is modulated by the desired audiofrequency. The combined signal is applied to the skin over the mastoids by Mylar-covered electrodes.
J, Tonndorf, B, Kurman
openaire +2 more sources
IEEE Access, 2021 The adoption of metal additive manufacturing into the production of passive microwave components is still in its relative infancy. However, it is of increasing interest due to the offer of geometrical design freedom and significant weight reduction.
Richard Gumbleton +3 more
doaj +1 more source
A Wide Frequency Scanning Printed Bruce Array Antenna with Bowtie and Semi-Circular Elements
Sensors, 2020 A printed edge-fed counterpart of the wire Bruce array antenna, for frequency scanning applications, is presented in this paper. The unit-cell of the proposed antenna consists of bowtie and semi-circular elements to achieve wide bandwidth from below 22 ...
Zeeshan Ahmed +2 more
doaj +1 more source
IET Microwaves, Antennas & Propagation, 2022 A high gain vertically polarised travelling‐wave frequency scanning array antenna fed by a meander rectangular waveguide is presented for Ku‐band operation.
Taher Badawy +3 more
doaj +1 more source
Seeding-Layer-Free Deposition of High-k Dielectric on CVD Graphene for Enhanced Gate Control Ability
Crystals, 2022 The gate insulator is one of the most crucial factors determining the performance of a graphene field effect transistor (GFET). Good electrostatic control of the conduction channel by gate voltage requires thin gate oxides.
Yunpeng Yan +4 more
doaj +1 more source
SSRN Electronic Journal, 2019 This paper studies the behaviour of Bitcoin returns at different sample frequencies. We consider high frequency returns starting from tick-by-tick price changes traded at the Bitstamp and Coinbase exchanges. We find evidence of a smooth intra-daily seasonality pattern, and an abnormal trade- and volatility intensity at Thursdays and Fridays. We find no
Leopoldo Catania, Mads Sandholdt
openaire +3 more sources
Comparison of non-convex cost functionals for the consideration of phase differences in phaseless near-field far-field transformations of measured antenna fields [PDF]
Advances in Radio Science, 2017 This work introduces two methods which extend the non-convex minimization problem arising in phaseless (NF) far-field (FF) transformations. With the new extensions, knowledge about phase differences between measurement points can be incorporated into ...
J. Knapp +3 more
doaj +1 more source
Electronics Letters, 2019 The authors propose a control method based on the downhill simplex (Nelder–Mead) method for adaptive optical filters used for channel equalisation in optical communication systems.
L. Baudzus, P.M. Krummrich
doaj +1 more source