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- Physics 1
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881
NONCONVENTIONAL METHODS USED TO STUDY EARTH´S THERMAL PROPERTIES INCLUDING GEOTHERMAL HEAT FLOW
Published 2025-06-01“…The method used in the present work uses data obtained from seismic tomography, velocity distribution of P waves and VP/VS ratio values, to define “warm” and “cold” regions in the crust. …”
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882
The Challenges and Opportunities for Performance Enhancement in Resonant Fiber Optic Gyroscopes
Published 2025-01-01“…In a conventional RFOG, a single-wavelength laser source is used to generate counter-propagating waves in a ring resonator, for which the phase difference is measured in terms of the resonant frequency shift to obtain the rotation rate. …”
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883
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Velocity and Density Fluctuations in the Quiet Sun Corona
Published 2025-01-01“…We find that most velocity fluctuations are due to Alfvénic waves but that intensity fluctuations come from a variety of sources, likely including fast and slow mode waves, as well as aperiodic variations. …”
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885
Chaotic chimp-mountain gazelle optimized FOPID control for frequency regulation in islanded airport microgrids with heterogeneous energy systems
Published 2025-08-01“…The system considered here is a multi-source airport model integrating wave, wind, solar, biogas turbines, battery energy storage systems, ultra-capacitors, and electric vehicles. …”
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886
New Spectral Range Generations from Laser-plasma Interaction
Published 2021-12-01“…Three types of laser were incorporated in the measurements, continuous-wave CW He-Ne laser, CW diode green laser, pulse Nd: YAG laser. …”
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887
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Multi-instrument analysis of medium-scale travelling ionospheric disturbances generated by an intense tropospheric jet-front system with severe convection in Europe in August 2023
Published 2025-01-01“…Tropospheric jet-front systems and intense convection are known to be potential sources of atmospheric gravity waves (AGWs), which can propagate upward. …”
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889
Interconnections between Minister Cabinets in Greece. A Bicentennial Study with Implications on Economy
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890
Influence of the Heterogeneity of Spatial Distribution of Peripheral Radio Equipment of 4G/5G Networks on the Level of Electromagnetic Background Created in Buildings
Published 2023-04-01“…Results of this analysis indicate a relatively small effect of the considered types of heterogeneity in the spatial distribution of radiation sources on the estimates of the electromagnetic background average intensity created by these sources inside the building, when using a technique based on the representation of the internal space of a building as a set of solid angles, which internal space separate sections are characterized by the constancy of the sources average space density and by the average conditions for radio waves propagation in the direction of the observation point.…”
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891
Effect of Regional Hadley Circulation‐Subtropical Jet Interaction: The Amplification of Central‐Pacific ENSO‐Induced Teleconnection Pattern
Published 2025-05-01“…This enhances interaction with the subtropical jet, strengthening the Rossby wave source. These findings underscore the pivotal role of regional HC in amplifying atmospheric teleconnection patterns, highlighting its importance amid the increasing frequency of CP ENSO events under a changing climate.…”
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Synchronous and Asynchronous X-Ray Monitoring of FRB 20190520B with the Chandra X-Ray Observatory
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894
Deep Ultraviolet CMOS-Controlled Micro Light-Emitting Diode Array
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895
Characteristics of Strong Cooling Events in Winter of Northeast China and Their Association with 10–20 d Atmosphere Low-Frequency Oscillation
Published 2024-12-01“…The key LF circulation systems affecting RSCEs include the Lake Balkhash–Baikal ridge, the East Asian trough (EAT), the robust Siberian high (SH) and the weaker (stronger) East Asian temperate (subtropical) jet, with the related anomaly centers moving from northwest to southeast and developing into a nearly north–south orientation. The LF wave energy of the northern branch from the Atlantic Ocean disperses to Northeast China, which excites the downstream disturbance wave train. …”
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896
Calibration-Free WMS Using a cw-DFB-QCL, a VCSEL, and an Edge-Emitting DFB Laser With In-Situ Real-Time Laser Parameter Characterization
Published 2017-01-01“…A 5250 nm continuous-wave distributed feedback quantum cascade laser, a 2004 nm vertical cavity surface emitting laser, and a 1650 nm distributed feedback edge-emitting laser are used to extract the concentration and pressure values of nitric oxide, carbon dioxide, and methane, respectively, using the <inline-formula><tex-math notation="LaTeX">$2f$ </tex-math></inline-formula> wavelength modulation spectroscopy (WMS) technique under controlled conditions. …”
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Characteristics of the electromagnetic environment created by radiations of user equipment of ...4G/5G/6G cellular (mobile) communications in buildings
Published 2021-10-01“…For known empirical models of radio wave propagation in buildings, expressions are obtained for the probability distribution density and expectation of the power flux density of electromagnetic fields generated inside building by these sources from various parts of the building's interior space: from the near zone with radio wave propagation conditions similar to free space; and from the far zone, for which, along with intense attenuation of radio waves due to internal obstacles, a «quasi-waveguide» propagation of radio waves along corridors and industrial premises is also possible in certain directions. …”
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899
Submodels of the three-dimentional Westervelt model in the absence of dissipation
Published 2022-09-01“…Under certain conditions, the existence and uniqueness of the solutions of the boundary value problems describing these wave processes are established. Among the submodels studied, in particular, the following submodels are contained: a submodel that describes a "conical ultrasonic field"; a submodel, describing the "spiral ultrasonic field"; a submodel describing a "pulsating ultrasonic beam" initiated by singular directional sources; a submodel that describes a spherically symmetric ultrasonic field for which the rate of change of the acoustic pressure has a singularity at the center, although the acoustic pressure does not have of the singularity.…”
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Optimization of Remote Backup Protection Coordination Logic Based on Dynamic Identification of Faulty Components in Transmission Grids
Published 2025-06-01“…For symmetrical faults, a single traveling wave monitoring device at the substation, combined with the global traveling wave arrival time difference and a double-ended ranging algorithm, is utilized to achieve microsecond-level fault location identification. …”
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