Results 71 to 80 of about 63,321 (235)

Immunosenescence Profile Is Associated With Increased Susceptibility to Severe COVID‐19

Aging Cell, EarlyView.
(A) A previous immunosenescence profile in individuals infected with SARS‐CoV2 creates a permissive environment for progression to severe COVID‐19: higher inflammaging, accumulation of exhausted/senescent T cells, an oligoclonal B‐cell repertoire, and accelerated epigenetic age.
Lucas Haniel A. Ventura, Lícia Torres, Giovanna Caliman Camatta, Jofer Zamame, Monique Macedo Coelho, Cecília Horta Ramalho‐Pinto, João Gervazio, Felipe Caixeta, Leandro Nascimento, Mariana Almeida Oliveira, Vinícius Dantas Martins, Marcos Felipe Oliveira, Murilo Soares Costa, Hugo Itaru Sato, Henrique Cerqueira Guimarães, Rafael Calvão Barbuto, Ana Paula Rocha Veiga, Najara Ataíde, Gabriela Prandi Caetano, Sarah Rangon, Mauro Lúcio O. Júnior, Fernanda Calvo Fortes, Luciana Zuccherato, Elaine Speziali, Olindo Assis Martins‐Filho, Verônica Coelho, Roberto Avritchir, Rafael Souza, Marina Ayupe, Caio Loureiro, Maria Eduarda Passos, Ana Clara Mota Neves, Pauline Leite, Santuza Maria Ribeiro Teixeira, Unaí Tupinambás, Liza Figueiredo Felicori, Gabriela Silveira‐Nunes, Tatiani Uceli Maioli, Denise Morais Fonseca, Andrea Teixeira‐Carvalho, Ana Maria Caetano Faria   +40 more
wiley   +1 more source

The Calculation and Analysis of the Bistatic Quantum Radar Cross Section for the Typical 2-D Plate

IEEE Photonics Journal, 2018
The quantum radar cross section (QRCS) describes how much return one gets when illuminating an object with a handful of photons. However, the previous studies mainly focused on the monostatic scattering of quantum radar. In this study, in response to the
Chonghua Fang, Hui Tan, Qi-Feng Liu, Li Tao, Long Xiao, Yanjun Chen, Liang Hua   +6 more
doaj   +1 more source

River Surface Analysis and Characterization Using FMCW Radar

IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing, 2022
Today’s warning systems for floods or droughts require sensor applications that provide a vast array of information. Current systems provide insight into either the water level or the river velocity.
Marc A. Mutschler, Philipp A. Scharf, Patrick Rippl, Timo Gessler, Thomas Walter, Christian Waldschmidt   +5 more
doaj   +1 more source

Numerical Investigations of the Aerothermal Performance of Modern Turbine Blade Tip Geometries at Design and Off‐Design Conditions and Under Stationary and Moving Shroud

Heat Transfer, Volume 54, Issue 5, Page 3193-3207, July 2025.
ABSTRACT High‐pressure turbine blade tips operate under extreme thermal stress, generating significant aerodynamic losses that must be continually optimized to improve engine efficiency and durability. This study uses computational fluid dynamics (CFD) to investigate the aerodynamic and thermal behavior of advanced turbine blade tip configurations ...
Kheir‐Eddine Arrif, Zakaria Mansouri, Salaheddine Azzouz   +2 more
wiley   +1 more source

Ice‐Nucleating Particles Are Emitted by Raindrop Impact

Journal of Geophysical Research: Atmospheres, Volume 130, Issue 11, 16 June 2025.
Abstract Ice‐nucleating particles (INPs) play a key role in ice formation and cloud microphysics and thus significantly impact the water cycle and the climate. However, our understanding of atmospheric INPs, particularly their sources, emissions, and spatiotemporal variability, is incomplete. While the enhancement of atmospheric INP concentrations with
C. Mignani, T. C. J. Hill, M. Nieto‐Caballero, K. R. Barry, N. C. Bryan, P. J. Marinescu, B. Dolan, A. P. Sullivan, M. Hernandez, A. Bosco‐Lauth, S. C. van den Heever, E. A. Stone, L. D. Grant, R. J. Perkins, P. J. DeMott, S. M. Kreidenweis   +15 more
wiley   +1 more source

Autonomous Year‐Round Measurements of O3 ${\mathbf{O}}_{\mathbf{3}}$, CO $\text{CO}$, CH4 ${\text{CH}}_{\mathbf{4}}$, and N2O ${\mathbf{N}}_{\mathbf{2}}\mathbf{O}$ in the High Arctic With the Atmospheric Emitted Radiance Interferometer

Journal of Geophysical Research: Atmospheres, Volume 130, Issue 11, 16 June 2025.
Abstract Despite its status as a proverbial canary in the coal mine for global climate change, the Arctic has limited observational data, particularly during polar night. Longwave atmospheric emission has been recorded since 2006 at the Polar Environment Atmospheric Research Laboratory, located at Eureka, Nunavut, Canada (80° ${}^{\circ}$N).
Joseph Hung, Lei Liu, Mathias Palm, Zen Mariani, Gloria L. Manney, Luis F. Millán, Kimberly Strong   +6 more
wiley   +1 more source

Gradient-Descent Based Optimization of Constant Envelope OFDM Waveforms [PDF]

arXiv, 2023
This paper describes a gradient-descent based optimization algorithm for synthesizing Constant Envelope Orthogonal Frequency Division Multiplexing (CE-OFDM) waveforms with low Auto-Correlation Function (ACF) sidelobes in a specified region of time-delays.
arxiv  

White noise jammer mathematical modelling and simulation [PDF]

, 2020
The radar equation is the fundamental mathematical modelling of the basic function of a radar system. Moreover there are many versions of the radar equation that correspond to particular radar operations, like a low PRF, a high PRF or a surveillance mode.
arxiv   +1 more source

Persepsi pelajar sarjana muda kejuruteraan elektrik terhadap program latihan industri, Kolej Universiti Teknologi Tun Hussein Onn [PDF]

, 2002
Kajian ini dijalankan bertujuan untuk mengetahui persepsi Pelajar Sarjana Muda Kejuruteraan Elektrik Terhadap Program Latihan Industri, KUiTTHO berdasarkan kepada 4 faktor iaitu kesesuaian penempatan program latihan industri, kesesuaian pendedahan ...
Mohamad Nur, Hanirah
core  

Expanding barriers: Impassable gaps interior to distribution of an isolated mountain‐dwelling species

Ecosphere, Volume 16, Issue 6, June 2025.
Abstract Global change is expected to expand and shrink species' distributions in complex ways beyond just retraction at warm edges and expansion at cool ones. Detecting these changes is complicated by the need for robust baseline data for comparison.
Erik A. Beever, Adam B. Smith, David Wright, Tom Rickman, Francis D. Gerraty, Joseph A. E. Stewart, Alisha Gill, Kelly Klingler, Megan Robinson   +8 more
wiley   +1 more source