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Effects of phase shift on bipartite and multipartite correlations of a spin chain under dephasing

100%
Chen A.-X., Zhang J.-S.
Open Physics
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2015
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vol. 13
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issue 1
EN
We investigate the effects of phase shift on entanglement, quantum discord, geometric discord, and spinsqueezing of a Heisenberg chain under dephasing. An analytical solution of the present model is obtained. Our results show that the initial correlations of the spin chain could be partially stored for a long time in the presence of dephasing and the amount of steady state correlations can be adjusted via phase shift. Particularly, we find the effects of phase shift on quantum discord and geometric discord are not always the same, i.e., the increase of geometric discord does not always imply the increase of quantum discord. Then, we calculate the spin-squeezing of the spin chain and find that spin-squeezing first increases with time and then reaches a plateau. The amount of spin-squeezing can be controlled via phase shift.
2
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Model for blade diagnosis in a working rotor machine employing the method of virtual elimination of stochastic environment

89%
Lindstedt P., Grądzki R., Lindstedt P., Grądzki R.
Archive of Mechanical Engineering
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2011
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vol. 58
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issue 3
3
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The collisions of two ion acoustic solitary waves in a magnetized nonextensive plasma

88%
El-Shamy E., Tribeche M., El-Taibany W.
Open Physics
|
2014
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vol. 12
|
issue 11
805-812
EN
Using the extended Poincaré-Lighthill-Kuo (EPLK) method, the interaction between two ion acoustic solitary waves (IASWs) in a multicomponent magnetized plasma (including Tsallis nonextensive electrons) has been theoretically investigated. The analytical phase shifts of the two solitary waves after interaction are estimated. The proposed model leads to rarefactive solitons only. The effects of colliding angle, ratio of number densities of (positive/negative) ions species to the density of nonextensive electrons, ion-to-electron temperature ratio, mass ratio of the negative-to-positive ions and the electron nonextensive parameter on the phase shifts are investigated numerically. The present results show that these parameters have strong effects on the phase shifts and trajectories of the two IASWs after collision. Evidently, this model is helpful for interpreting the propagation and the oblique collision of IASWs in magnetized multicomponent plasma experiments and space observations.
4
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Distortion-product otoacoustic emission phase shift test (Shift-DPOAE) – methodology of measurements and interpretation of results in example cases

75%
Lachowska M., Prus-Ostaszewska M., Niemczyk K.
Polski Przegląd Otorynolaryngologiczny
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2020
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vol. 9(1)
1-5
EN
Objective: The objective of the study was to present the methodology and interpretation of the results of distortion-product otoacoustic emission phase shift (Shift-DPOAE) measurements in healthy subjects and patients with Meniere’s disease in remission or during the attack. Material and methods: Shift-DPOAE measurements were performed in two healthy subjects with no otological or neurological problems as well as in six patients diagnosed with Meniere’s disease. Results obtained from all eight subjects are presented. Detailed otoscopy, impedance audiometry, pure tone audiometry, DPOAE, and Shift-DPOAE tests were performed in all subjects. Results: Normal results of Shift-DPOAE measurements obtained from two healthy subjects as well as normal (two subjects) and abnormal (four subjects) Shift-DPOAE results obtained from patients with Meniere’s disease are presented in order to thoroughly discuss the methodology and interpretation of Shift-DPOAE measurements. Conclusions: Shift-OAE is a promising diagnostic tool with a great clinical potential for diagnostics and monitoring of Meniere’s disease in patients whose hearing has not yet been damaged. The test is completely non-invasive and can be carried out immediately after the onset of disease attack with symptoms still present at the time of the test; in addition, the procedure takes just several minutes.
5
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Single parallel stubs as broadband microwave phase shifters

75%
Rutkowski A., Rutkowski A.
Metrology and Measurement Systems
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2020
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vol. 27
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issue 1
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