Results 241 to 250 of about 3,211,049 (333)
One Metasurface for Four‐Channel Terahertz Wavefront Manipulation Based on Vanadium Dioxide
Advanced Physics Research, EarlyView.This article presents a thermally reconfigurable metasurface utilizing vanadium dioxide (VO2) to dynamically switch between four independent wavefront‐manipulation channels. By synergizing geometric and propagation phases, the platform enables spin‐decoding for circularly polarized waves and polarization multiplexing for linearly polarized waves ...
Zhaofeng Yang +7 more
wiley +1 more source
Eigenvalues of the covariance matrix as early warning signals for critical transitions in ecological systems. [PDF]
Sci Rep, 2019 Chen S, O'Dea EB, Drake JM, Epureanu BI.
europepmc +1 more source
The relationship between form and function of the carnivore mandible
The Anatomical Record, EarlyView.Abstract Dietary morphology diversified extensively in Carnivoraformes (living Carnivora and their stem relatives) during the Cenozoic (the last 66 million years) as they evolved to capture, handle, and process new animal and plant diets. We used 3D geometric morphometrics, mechanical advantage, and finite element analysis to test the evolutionary ...
Charles J. Salcido, P. David Polly
wiley +1 more source
Channel Covariance Matrix Estimation via Dimension Reduction for Hybrid MIMO MmWave Communication Systems. [PDF]
Sensors (Basel), 2019 Hu R, Tong J, Xi J, Guo Q, Yu Y.
europepmc +1 more source
Distal femoral morphology as a risk factor for osteoarthritis
The Anatomical Record, EarlyView.Abstract Osteoarthritis (OA) is a leading cause of disability affecting millions of adults in the United States, commonly resulting in the need for total knee arthroplasty (TKA) to restore mobility and quality of life. This study investigates potential differences in baseline distal femoral shape between individuals who received TKA due to OA and a ...
Haley Horbaly
wiley +1 more source
Knowledge-Aided Structured Covariance Matrix Estimator Applied for Radar Sensor Signal Detection. [PDF]
Sensors (Basel), 2019 Kang N, Shang Z, Du Q.
europepmc +1 more source
The Anatomical Record, EarlyView.Abstract Analysis of the variation in the bony structures of the inner and middle ear provides critical insights into functional morphology, as well as adaptive morphology across primates. In this study, we investigated whether ear morphology patterns are related to the ecological characteristics of species and their habitats to test two acoustic ...
Myriam Marsot +4 more
wiley +1 more source
Broadening the semiaquatic scene: Quantification of long bone microanatomy across pinnipeds
The Anatomical Record, EarlyView.Abstract Investigations of bone microanatomy are commonly used to explore lifestyle strategies in vertebrates. While distinct microanatomical limb bone features have been established for exclusively aquatic and terrestrial lifestyles, identifying clear patterns for the semiaquatic lifestyle remains more challenging.
Apolline Alfsen +10 more
wiley +1 more source
ARMA Cholesky Factor Models for the Covariance Matrix of Linear Models. [PDF]
Comput Stat Data Anal, 2017 Lee K, Baek C, Daniels MJ.
europepmc +1 more source
The Anatomical Record, EarlyView.A new musculoskeletal reconstruction and revision of the cranio‐mandibular anatomy of the Devonian arthrodire placoderm Dunkleosteus terrelli from a comparative and functional anatomical perspective. Dunkleosteus is a specialized arthrodire with many specializations for feeding on large vertebrates, and many of its features are part of broader ...
Russell K. Engelman +4 more
wiley +1 more source