Results 131 to 140 of about 35,657 (302)

Estimating Ionospheric Phase Scintillation Indices in the Polar Region from 1 Hz GNSS Observations Using Machine Learning

Remote Sensing
Ionospheric scintillation represents a disturbance phenomenon induced by irregular electron density variations, predominantly occurring in equatorial, auroral, and polar regions, thereby posing significant threats to Global Navigation Satellite Systems ...
Zhuojun Han, Ruimin Jin, Longjiang Chen, Weimin Zhen, Huaiyun Peng, Huiyun Yang, Mingyue Gu, Xiang Cui, Guangwang Ji   +8 more
doaj   +1 more source

Systemic aging fuels heart failure: Molecular mechanisms and therapeutic avenues

ESC Heart Failure, Volume 12, Issue 2, Page 1059-1080, April 2025.
Abstract Systemic aging influences various physiological processes and contributes to structural and functional decline in cardiac tissue. These alterations include an increased incidence of left ventricular hypertrophy, a decline in left ventricular diastolic function, left atrial dilation, atrial fibrillation, myocardial fibrosis and cardiac ...
Zhuyubing Fang, Umar Raza, Jia Song, Junyan Lu, Shun Yao, Xiaohong Liu, Wei Zhang, Shujuan Li   +7 more
wiley   +1 more source

Gps Equatorial Ionospheric Scintillation Signals Simulation, Characterization, and Estimation [PDF]

, 2019
Strong equatorial ionospheric scintillation is characterized with simultaneous deep amplitude fading and fast phase fluctuations, which can severely degrade GNSS receiver performance and impact a variety of GNSS applications.
van Graas, Frank, committee member, Xu, Dongyang, Xu, Dongyang, author, Pinaud, Olivier, committee member, Morton, Yu, advisor, Rino, Charles, committee member   +5 more
core  

A phenomap of TTR amyloidosis to aid diagnostic screening

ESC Heart Failure, Volume 12, Issue 2, Page 1113-1118, April 2025.
Abstract Cardiac amyloidosis due to transthyretin (ATTR) remains an underdiagnosed cause of cardiomyopathy. As awareness of the disease grows and referrals for ATTR increase, clinicians are likely to encounter more atypical forms of the condition in clinical practice.
Alexios S. Antonopoulos, Theodoros Tsampras, George Lazaros, Konstantinos Tsioufis, Charalambos Vlachopoulos   +4 more
wiley   +1 more source

Ionospheric irregularities, scintillation and its effect on systems

, 2004
An essential component of the ionosphere is a small-scale electron density structure that causes scintillation of radio waves on transionospheric links.
Alfonsi, Lucilla, Wernik, Andrzej, Materassi, Massimo   +2 more
core  

Dioxomolybdenum(VI) Complexes Supported by Fluxional Bis(amide)‐Functionalized Aminophenolate Ligands

European Journal of Inorganic Chemistry, EarlyView.
New bis(amide) aminophenolate ligands form dioxomolybdenum(vi) and dioxotungsten(vi) complexes showing solvent‐dependent nuclearity. Whilst monomeric complexes featuring methoxide ligands are obtained in methanol, water triggers formation of μ‐oxo‐bridged dimers via oxo exchange, verified by 18O labelling.
Pasi Vikberg, Anssi Peuronen, Manu Lahtinen, Ari Lehtonen   +3 more
wiley   +1 more source

Luminescence properties of Tb3+-activated K2O–La2O3–Ga2O3 glasses

Optical Materials: X
Photoluminescence, scintillation, and thermoluminescence characteristics of the Tb3+-activated gallate glasses (20K2O–(11-x/2)La2O3–69Ga2O3–x/2Tb4O7, x = 0.1–1.0) were investigated. The Tb3+-activated gallate glasses exhibited photoluminescence with some
Naoki Kawano, Kenji Shinozaki, Daisuke Nakauchi, Takumi Kato, Yuma Takebuchi, Hiroyuki Fukushima, Takayuki Yanagida   +6 more
doaj   +1 more source

Design, Synthesis, and Photophysical Studies of Functionalized Polyaromatic Isonitriles as Visible Light Photoredox Catalysts

European Journal of Organic Chemistry, EarlyView.
A new series of structurally rich polyaromatic isonitriles is presented as photoredox catalysts. Their photophysical properties are investigated by UV–Vis absorption and fluorescence measurements, combined with experimental and theoretical studies to evaluate both ground‐ and excited‐state redox properties.
Cristina Martini, Camilla Russo, Jussara Amato, Carmine Volpe, Francesca Brunelli, Laurence Grimaud, Maxime R. Vitale, Greta Donati, Andrea Basso, Mariateresa Giustiniano   +9 more
wiley   +1 more source

Epoxidation of Cashmeran and Unprecedented Rearrangement to an α‐Carbonyl δ‐Spirolactone

European Journal of Organic Chemistry, EarlyView.
A new strategy enables diastereoselective conversion of Cashmeran into a previously unknown α‐carbonyl δ‐spirolactone via epoxidation, Baeyer–Villiger oxidation, and acid‐catalyzed rearrangement. Structure and mechanism were confirmed by NMR, single crystal X‐ray diffraction, and computational studies. We report the epoxidation of Cashmeran followed by
Lukas Kell, Niklas Bartsch, Johannes Panten, Marcus Eh, Jan Paradies, Hans Egold, Anke Spannenberg, Thomas Werner   +7 more
wiley   +1 more source

Experimental Study on the Scintillation Index of Vortex Beam Superposition States Perturbed by Linear Array Acoustic Sources in Atmospheric Environments

Photonics
Acoustic waves, as mechanical waves, can perturb atmospheric pressure during propagation, altering the refractive index and turbulence distribution.
Jialin Zhang, Mingjun Wang, Luxin Diao, Yafei Wei, Pengchao Zhu   +4 more
doaj   +1 more source