Results 21 to 30 of about 260,297 (259)

Wnt signaling in cardiovascular disease: opportunities and challenges [PDF]

Current Opinion in Lipidology, 2017
Purpose of reviewCardiometabolic diseases increasingly afflict our aging, dysmetabolic population. Complex signals regulating low-density lipoprotein receptor-related protein (LRP) and frizzled protein family members – the plasma membrane receptors for the cadre of Wnt polypeptide morphogens – contribute to the control of cardiovascular homeostasis ...
Austin, Gay, Dwight A, Towler
openaire   +2 more sources

Analysis of Instantaneous Doppler Positioning Performance Based on LEO Satellite Ephemeris Errors

Remote Sensing
To address the limitations of Global Navigation Satellite Systems (GNSSs), such as vulnerability to electromagnetic interference and weak ground signal power, signal of opportunity (SOP) provided by low Earth orbit (LEO) satellites can serve as a backup ...
Xingyu Shi, Mingjian Chen, Wanli Li, Yuxing Li, Wei Lv, Wenlong Zhou, Yang Shen, Xueqing Li, Jiashu Yu   +8 more
doaj   +1 more source

Applicability of the ultra-high radio frequency band (UHF) for hydrometeor detection by phase difference method

Contributions to Geophysics and Geodesy, 2021
Hydrometeors (rain, fog and ice crystals) affect the transmission of electromagnetic signals. Previous research showed that alterations in the signal (amplitude and phase) are affected by the composition of the atmosphere, e.g.
Peter FABO, Pavol NEJEDLÍK, Michal KUBA, Milan ONDERKA, Dušan PODHORSKÝ   +4 more
doaj   +1 more source

The First Step of AI in LEO SOPs: DRL-Driven Epoch Credibility Evaluation to Enhance Opportunistic Positioning Accuracy

Remote Sensing
Low Earth orbit (LEO) signal of opportunity (SOP) positioning relies on the accumulation of epochs obtained through prolonged observation periods. The contribution of an LEO satellite single epoch to positioning accuracy is influenced by multi-level ...
Jiaqi Yin, Feilong Li, Ruidan Luo, Xiao Chen, Linhui Zhao, Hong Yuan, Guang Yang   +6 more
doaj   +1 more source

Modified Blind Equalization Algorithm Based on Cyclostationarity for Contaminated Reference Signal in Airborne PBR

Sensors, 2020
In airborne passive bistatic radar (PBR), the reference channel toward the opportunity illuminator is applied to receive the direct-path signal as the reference signal. In the actual scenario, the reference signal is contaminated by the multipath signals
Shuai Guo, Jun Wang, Hui Ma, Jipeng Wang
doaj   +1 more source

Genomic Diversity and Clinical Variability in Pediatric Primary Cutaneous Anaplastic Large Cell Lymphoma: A Case Series

Pediatric Blood &Cancer, EarlyView.
ABSTRACT Primary cutaneous anaplastic large cell lymphoma (pcALCL) is a rare pediatric CD30‐positive T‐cell lymphoproliferative disorder with an excellent prognosis, but its genomic drivers are poorly defined. We report three children with skin‐limited disease demonstrating striking molecular heterogeneity, including NPM::ALK, NUP214::FRK, and a novel ...
Shoshana Greenberger, Efrat Bar‐Ilan, Victoria Marcu, Evgeny Grishin, Rinat Yacobi, Aviv Barzilai, Hana Golan, Assaf Arie Barg   +7 more
wiley   +1 more source

Receiver architectures for positioning with low earth orbit satellite signals: a survey

EURASIP Journal on Advances in Signal Processing, 2023
Positioning, Navigation and Timing (PNT) are services generally provided by Global Navigation Satellite Systems (GNSS). GNSS reside in medium to high orbital altitudes from the Earth’s surface, resulting in weak signal reception.
Christina Pinell, Fabricio S. Prol, M. Zahidul H. Bhuiyan, Jaan Praks   +3 more
doaj   +1 more source

Weak signal detection: A discrete window of opportunity for achieving ‘Vision 90:90:90’?

SAHARA-J, 2016
Introduction: UNAIDS’ Vision 90:90:90 is a call to ‘end AIDS’. Developing predictive foresight of the unpredictable changes that this journey will entail could contribute to the ambition of ‘ending AIDS’.
Christopher J. Burman, Marota Aphane, Peter Delobelle   +2 more
doaj   +1 more source

Navigation GPS/GLONASS in the Arctic and aurora [PDF]

Vestnik MGTU, 2016
The correspondence of the time-spatial distribution of the radiances of the aurora oval and time-spatial changes in the parameters of the navigation satellites' signal has been shown.
Chernouss S. A., Shagimuratov I. I. , Vulfovich B. A. , Kalitenkov N. V.   +3 more
doaj   +1 more source

PPARγ signaling and emerging opportunities for improved therapeutics [PDF]

Pharmacological Research, 2016
Peroxisome proliferator-activated receptor gamma (PPARγ) is a ligand-activated nuclear receptor that regulates glucose and lipid metabolism, endothelial function and inflammation. Rosiglitazone (RGZ) and other thiazolidinedione (TZD) synthetic ligands of PPARγ are insulin sensitizers that have been used for the treatment of type 2 diabetes.
Shuibang, Wang, Edward J, Dougherty, Robert L, Danner   +2 more
openaire   +2 more sources