Results 41 to 50 of about 191,135 (314)

Disordered but rhythmic—the role of intrinsic protein disorder in eukaryotic circadian timing

FEBS Letters, EarlyView.
Unstructured domains known as intrinsically disordered regions (IDRs) are present in nearly every part of the eukaryotic core circadian oscillator. IDRs enable many diverse inter‐ and intramolecular interactions that support clock function. IDR conformations are highly tunable by post‐translational modifications and environmental conditions, which ...
Emery T. Usher, Jacqueline F. Pelham
wiley   +1 more source

Design of Mega-Constellations for Global Uniform Coverage with Inter-Satellite Links

Aerospace, 2022
Constellation configuration design is a prerequisite and critical step in the construction of a mega-constellation system in low Earth orbit. However, the huge number of satellites and the intricate changes in relative positions among them make the ...
Lu Jia, Yasheng Zhang, Jinlong Yu, Xuan Wang   +3 more
doaj   +1 more source

Time after time – circadian clocks through the lens of oscillator theory

FEBS Letters, EarlyView.
Oscillator theory bridges physics and circadian biology. Damped oscillators require external drivers, while limit cycles emerge from delayed feedback and nonlinearities. Coupling enables tissue‐level coherence, and entrainment aligns internal clocks with environmental cues.
Marta del Olmo, Carolin Ector, Hanspeter Herzel   +2 more
wiley   +1 more source

Fluid Biomarkers of Disease Burden and Cognitive Dysfunction in Progressive Supranuclear Palsy

Annals of Clinical and Translational Neurology, EarlyView.
ABSTRACT Objective Identifying objective biomarkers for progressive supranuclear palsy (PSP) is crucial to improving diagnosis and establishing clinical trial and treatment endpoints. This study evaluated fluid biomarkers in PSP versus controls and their associations with regional 18F‐PI‐2620 tau‐PET, clinical, and cognitive outcomes.
Roxane Dilcher, Charles B. Malpas, Stuart J. McDonald, William T. O’Brien, Craig Despott, Kelly L. Bertram, Matthew P. Pase, Lukas Frontzkowski, Meng Law, Terence J. O’Brien, Lucy Vivash   +10 more
wiley   +1 more source

Baseline Regional Cholinergic Denervation Predicts Cognitive Trajectories in Moderate Parkinson Disease

Annals of Clinical and Translational Neurology, EarlyView.
ABSTRACT Objective Cognitive decline is a disabling and variable feature of Parkinson disease (PD). While cholinergic system degeneration is linked to cognitive impairments in PD, most prior research reported cross‐sectional associations. We aimed to fill this gap by investigating whether baseline regional cerebral vesicular acetylcholine transporter ...
Taylor Brown, Giulia Carli, Prabesh Kanel, Stiven Roytman, Jaimie Barr, Nicolaas I. Bohnen, Roger L. Albin   +6 more
wiley   +1 more source

A DTN routing scheme for quasi-deterministic networks with application to LEO satellites topology [PDF]

, 2012
We propose a novel DTN routing algorithm, called DQN, specifically designed for quasi-deterministic networks with an application to satellite constellations.
Baudoin, Cédric, Diana, Rémi, Dubois, Emmanuel, Franck, Laurent, Gelard, Patrick, Lochin, Emmanuel   +5 more
core   +3 more sources

Analyzing Electronic Excitations and Exciton Binding Energies in Y6 Films

Advanced Functional Materials, EarlyView.
The Y6 molecule is used for increasing the efficiency of organic solar cells. The exciton binding energy is calculated for ensembles of Y6 molecules that are representative of the typically used films. The calculations show that the excitons typically spread out over many molecules.
Sahar Javaid Akram, Sophie Meißner, Stephan Kümmel   +2 more
wiley   +1 more source

Stages of Structural and Parametric Synthesis of Low Earth Orbit Communication Systems with Broadband Inter-Satellite Links

RUDN Journal of Engineering Research
The paper discusses the scientific rationale for the structural and parametric synthesis of low Earth orbit communication systems (LEOCSs) with broadband inter-satellite links (ISLs) and on-board data routing, principles and stages underlying data ...
Sergey B. Pichugin
doaj   +1 more source

Internet of Satellites (IoSat): analysis of network models and routing protocol requirements [PDF]

, 2018
The space segment has been evolved from monolithic to distributed satellite systems. One of these distributed systems is called the federated satellite system (FSS) which aims at establishing a win-win collaboration between satellites to improve their ...
Calveras Augé, Anna M., Camps Carmona, Adriano José, Ruiz de Azúa Ortega, Joan Adrià   +2 more
core   +2 more sources

A 23-GHz TX/LNA Front-End Module for Inter-Satellite Links With 27.8% Peak Efficiency in the TX Path and 3.1-dB NF in the RX Path

IEEE Journal of Solid-State Circuits
This article presents a 23-GHz transmitter/low-noise amplifier (TX/LNA) front-end module (FEM) in 130-nm SiGe BiCMOS for inter-satellite links (ISLs) in the system of orbiting low-frequency antenna array (OLFAR).
Kaijie Ding, V. Vidojkovic, D. Milosevic, K. Khalaf, R. van Dommele, Mark Bentum, Peter Baltus   +6 more
semanticscholar   +1 more source