Results 21 to 30 of about 8,030,235 (300)
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
Amplification of High Harmonics Using Weak Perturbative High Frequency Radiation [PDF]
, 2007 The mechanism underlying the substantial amplification of the high-order harmonics q \pm 2K (K integer) upon the addition of a weak seed XUV field of harmonic frequency q\omega to a strong IR field of frequency \omega is analyzed in the framework of the ...
Avner Fleischer +4 more
core +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
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Current Opinion in Anaesthesiology, 1988 The need to maintain adequate gas exchange in patients with respiratory insufficiency led already in the early beginning of the 20th century to the development of certain methods which can be apostrophized as the basis of the today techniques of the so called “High Frequency Ventilation” (HFV).
N. Mutz, M. Baum, H. Benzer
openaire +3 more sources
Remote SensingThe use of near-Earth space has grown dramatically during the last decades, resulting in thousands of active and inactive satellites and a huge amount of space debris.
Jens Klare +11 more
doaj +1 more source
Biosensors, 2022 Due to the occurrence of THz-excited vibrational modes in biomacromolecules, the THz frequency range has been identified as particularly suitable for developing and applying new bioanalytical methods.
Christian Weisenstein +4 more
doaj +1 more source
Pediatric Blood &Cancer, EarlyView.ABSTRACT Background Pediatric patients with extracranial solid tumors (ST) receiving chemotherapy are at an increased risk for Pneumocystis jirovecii pneumonia (PJP). However, evidence guiding prophylaxis practices in this population is limited. A PJP‐related fatality at our institution highlighted inconsistent prescribing approaches and concerns about
Kriti Kumar +8 more
wiley +1 more source
A circular switched parasitic array with directors for LoRa applications at 868 MHz
Electronics LettersThe integration of directive elements into a circular switched parasitic array at 868 MHz is presented. The typical usage of reflective parasitic monopoles is supplemented with additional, shorter monopole elements which are positioned closer to the ...
Lukas Reinhold +2 more
doaj +1 more source
GaAs PHEMT PERFORMANCE INCREASE USING DELTA-DOPING IN THE FORM OF NANOWIRES OF TIN ATOMS
Российский технологический журнал, 2017 The PHEMT epitaxial structures with a doping profile in the form of tin nanowires were fabricated using vicinal GaAs substrate disoriented by 0.3° in relation to accurate orientation (100). Investigation of electron transport properties of the structures
A. E. Yachmenev +2 more
doaj +1 more source
IEEE Journal of Microwaves, 2021 The unique properties of microwaves make them useful in many diverse applications across a wide range of fields, spanning much of engineering and science. In the chemical sciences, microwaves provide a toolkit of electric and magnetic effects with which,
Daniel R. Slocombe, Adrian Porch
doaj +1 more source