Results 81 to 90 of about 22,383 (198)

Role of the Diurnal Tide in Driving the Westward Phase of the Mesospheric Semiannual Oscillation Around March Equinox

open access: yesGeophysical Research Letters, Volume 53, Issue 3, 16 February 2026.
Abstract The mesospheric semiannual oscillation (MSAO) in tropical zonal‐mean zonal winds exhibits a strong westward phase around March equinox. It has been thought that the migrating diurnal tide (DW1) plays a role in the initiation of this phase because DW1 peaks around this time and satellite observations have shown it to undergo wave breaking.
Christopher S. Krier   +2 more
wiley   +1 more source

Ambiguity and area preserving linear transformations in over‐the‐horizon radar

open access: yesIET Radar, Sonar & Navigation
The use of recurrent waveforms in over‐the‐horizon radar (OTHR) necessitates techniques for ambiguity resolution and manipulation. This paper provides a number of techniques for manipulating the shape of radar ambiguity functions.
Stephen D. Howard, Van Khanh Nguyen
doaj   +1 more source

Acceptance testing of a 0.35 T MR‐Linac: procedures, QA baseline, and system limitations

open access: yesJournal of Applied Clinical Medical Physics, Volume 27, Issue 2, February 2026.
Abstract Purpose This study describes and evaluates the acceptance procedure for a ViewRay (VR) MRIdian 0.35T MR‐Linac, emphasizing key challenges, limitations, and recommendations to enhance clinical performance and accuracy. Methods A comprehensive acceptance test was conducted at a single institution, following the manufacturer's protocols and ...
Mateb Al Khalifa   +4 more
wiley   +1 more source

Single Carrier-Frequency Division Multiple Access Radar: Waveform Design and Analysis

open access: yesIEEE Access, 2020
This paper proposes Single Carrier-FDMA radar, which is not only a solution to the shortcomings of OFDM radars but also offers improved Ambiguity Function and autocorrelation properties.
Rahat Saadia, Noor M. Khan
doaj   +1 more source

Smart REASSURED Sensors via Machine‐Augmented Printable On‐Paper Arrays

open access: yesAdvanced Sensor Research, Volume 5, Issue 2, February 2026.
This perspective highlights the emerging role of pattern‐recognition, printable on‐paper sensor arrays for intelligent PoC diagnostics. It discusses how paper's inherent limitations can be overcome through surface modification and scalable printing, and how machine‐learning analysis of cross‐reactive arrays enables multiplexed, low‐cost, and REASSURED ...
Naimeh Naseri, Saba Ranjbar
wiley   +1 more source

Cognitive Sub-Nyquist Hardware Prototype of a Collocated MIMO Radar

open access: yes, 2016
We present the design and hardware implementation of a radar prototype that demonstrates the principle of a sub-Nyquist collocated multiple-input multiple-output (MIMO) radar.
Cohen, David   +8 more
core   +1 more source

High‐Entropy Chemical Composition Design for Ultrahigh Capacitive Energy Storage

open access: yesAdvanced Science, Volume 13, Issue 9, 13 February 2026.
La‐donor doping suppresses defect charges and reduces domain size via local random fields. Conversely, NaNbO3 addition in BNT‐based ceramics stabilizes the orthorhombic phase. This creates R‐O‐T multiphase polar nanoregions within a cubic matrix, which lowers the energy barrier, delays polarization saturation, and enables a high breakdown strength ...
Muhammad Habib   +10 more
wiley   +1 more source

Phase coded waveforms for integrated sensing and communication systems

open access: yesIET Radar, Sonar & Navigation
Nowadays, especially with the developments in the automotive industry, it has become a highly popular topic for radar and communication systems to operate on the same platform and perform joint tasks to increase situational awareness.
Sevda Şahin, Tolga Girici
doaj   +1 more source

Same/Other/All K‐Fold Cross‐Validation for Estimating Similarity of Patterns in Data Subsets

open access: yesStatistical Analysis and Data Mining: An ASA Data Science Journal, Volume 19, Issue 1, February 2026.
ABSTRACT In many real‐world applications of machine learning, we are interested to know if it is possible to train on the data that we have gathered so far, and obtain accurate predictions on a new test data subset that is qualitatively different in some respect (time period, geographic region, etc.).
Toby Dylan Hocking   +5 more
wiley   +1 more source

Jammer-Nulling Transmit-Adaptive Radar Against Knowledge-Based Jammers in Electronic Warfare

open access: yesIEEE Access, 2019
The authors present transmit-adaptive jammer nulling waveforms in cognitive radar (CRr) for aircraft response recognition as a form of electronic support in the electronic warfare domain. New forms of knowledge-based noise jammers that function as a form
Q. Jeanette O. Tan, Ric A. Romero
doaj   +1 more source

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