Results 121 to 130 of about 173,689,056 (279)

Combined Coherent and Non-Coherent Long-Time Integration Method for High-Speed Target Detection Using High-Frequency Radar

Remote Sensing
High-frequency (HF) radar plays a crucial role in the detection of far-range, stealth, and high-speed targets. Nevertheless, the echo signal of such targets typically exhibits a low signal-to-noise ratio (SNR) and significant amplitude fluctuations ...
Gan Liu, Yingwei Tian, Biyang Wen, Chen Liu   +3 more
doaj   +1 more source

Relationship between changes in resting-state spontaneous brain activity and cognitive impairment in patients with CADASIL

The Journal of Headache and Pain, 2019
Background Cerebral autosomal dominant arteriopathy with subcortical infarcts and leukoencephalopathy (CADASIL) mainly manifests with cognitive impairment.
Jingjing Su, Mengxing Wang, Shiyu Ban, Liang Wang, Xin Cheng, Fengchun Hua, Yuping Tang, Houguang Zhou, Yu Zhai, Xiaoxia Du, Jianren Liu   +10 more
doaj   +1 more source

Discrepancies Between Micro Versus Macroscale Viscoelastic Properties in a Microplastic‐Tissue Composite Model

Advanced Engineering Materials, EarlyView.
This study explores the discrepancies between bulk mechanics and spatial mapping in a tissue‐mimetic hydrogel model. Microplastic particles create localized stiff mechanical microenvironments that are detectable by cellular‐scale nanoindentation but leave bulk properties unchanged as measured by rheology.
Ahron T. Verschleisser, Baptiste Le Roi, Omri Leshem, Joshua M. Grolman   +3 more
wiley   +1 more source

Temporal variability of dALFF in sgACC positively correlated with duration of disease.

, 2019
Abbreviations: dALFF, amplitude of low-frequency fluctuation; sgACC, subgenual anterior cingulate cortex.
Mingjuan Zhao (2819908), Honglei Liu (1538044), Jing Wu (54032), Wenling Li (1692301), Jie Wu (10038), Jiankai Yang (6990218), Baohua Jiao (6990221)   +6 more
core   +1 more source

Simulation‐Based Analysis of Insert Pull‐Out in Nickel‐Polyurethane Hybrid Foams Using CT‐Derived Geometries

Advanced Engineering Materials, EarlyView.
CT‐based finite element simulations combined with in situ X‐ray computed tomography are used to analyze insert pull‐out in nickel‐coated polymer foams. Despite variations in material parameters, deformation consistently concentrates within a narrow annular region around the insert.
Yannik Bautz, Jonas Fell, Hendrik Jost, Stefan Diebels, Hans‐Georg Herrmann   +4 more
wiley   +1 more source

Cavitation associated low-frequency fluctuation [PDF]

This self-guided thesis presents the research results of the Cavitation Associated Low-frequency Fluctuation, i. e. one part of the long-term research project on Statistical Characteristics of Cavitation Bubble Collapse Pulses.
Li, Shengcai, 1941-
core  

Constraining low-frequency Alfvenic turbulence in the solar wind using density-fluctuation measurements

, 2009
One proposed mechanism for heating the solar wind, from close to the Sun to beyond similar to 10 AU, invokes low-frequency, oblique, Alfven-wave turbulence.
Pongkitiwanichakul, Peera, Xia, Qian, Howes, Gregory G., Quataert, Eliot, Chandran, Benjamin D.G.   +4 more
core   +1 more source

A Novel Approach to Estimate the Transition Temperature via Dynamic Nanoindentation

Advanced Engineering Materials, EarlyView.
A new dynamic nanoindentation‐based method was developed that uses the stiffness ratio as an indicator of the elastic–plastic deformation contributions at different temperatures. The approach successfully identified transition temperatures in ferritic steel and distinguished them from continuously ductile austenitic steel.
Stefan Zeiler, Nikolaus Kostwein, Ronald Schnitzer, Christian Mitterer, Verena Maier‐Kiener   +4 more
wiley   +1 more source

Dynamic alterations in the amplitude of low-frequency fluctuation in patients with cerebral small vessel disease. [PDF]

Front Mol Neurosci, 2023
Song J, Lei T, Li Y, Zhou L, Yan W, Li H, Chen L.   +6 more
europepmc   +1 more source

Elastic–Plastic Modeling and Experimental Characterization of Granular Jamming Actuators

Advanced Engineering Materials, EarlyView.
Granular jamming enables rapid switching between soft and rigid mechanical states. Here, a reduced‐order elastic‐perfectly‐plastic beam framework captures pressure‐dependent loading, unloading, residual deformation, and hysteresis in jammed beams, while matching three‐point bending experiments across materials and geometries. The framework links design
Saheli Patel, Prashant K. Purohit, Jordan R. Raney   +2 more
wiley   +1 more source