Results 61 to 70 of about 842,020 (274)

Time varying velocity of light

, 2002
Published in Proceedings of "Einstein Centenary Symposium, 1980 at Nagpur ...
openaire   +2 more sources

Time-varying observer of the supporting body velocity for vibration units

IFAC-PapersOnLine, 2016
Abstract The problem of controlled passage through resonance zone for mechanical systems with several degrees of freedom is analyzed. Existing control algorithms based on speed-gradient method require measurement of the full state vector of the system. In this paper a novel control algorithm based on a time-varying partial observer for the supporting
Alexander L. Fradkov, Olga P. Tomchina, Dmitry A. Tomchin, Dmitry V. Gorlatov   +3 more
openaire   +1 more source

Real‐time assay of ribonucleotide reductase activity with a fluorescent RNA aptamer

FEBS Letters, EarlyView.
Ribonucleotide reductases (RNR) synthesize DNA building blocks de novo, making them crucial in DNA replication and drug targeting. FLARE introduces the first single‐tube real‐time coupled RNR assay, which enables isothermal tracking of RNR activity at nanomolar enzyme levels and allows the reconstruction of allosteric regulatory patterns and rapid ...
Jacopo De Capitani, Noemi E. Nwosu, Viktoria Gocke, Müge Kasanmascheff, Hannes Mutschler   +4 more
wiley   +1 more source

A Stark decelerator on a chip [PDF]

, 2008
A microstructured array of 1254 electrodes on a substrate has been configured to generate an array of local minima of electric field strength with a periodicity of 120 $\mu$m about 25 $\mu$m above the substrate.
Conrad, Horst, Meek, Samuel A, Meijer, Gerard   +2 more
core   +2 more sources

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

Transport coefficients for the shear dynamo problem at small Reynolds numbers

, 2011
We build on the formulation developed in Sridhar & Singh (JFM, 664, 265, 2010), and present a theory of the \emph{shear dynamo problem} for small magnetic and fluid Reynolds numbers, but for arbitrary values of the shear parameter.
F. Krause, F. Krause, H. K. Moffatt, Nishant K. Singh, S. Sridhar   +4 more
core   +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

Batch Nonlinear Continuous-Time Trajectory Estimation as Exactly Sparse Gaussian Process Regression

, 2014
In this paper, we revisit batch state estimation through the lens of Gaussian process (GP) regression. We consider continuous-discrete estimation problems wherein a trajectory is viewed as a one-dimensional GP, with time as the independent variable.
Anderson, Sean, Barfoot, Timothy D., Särkkä, Simo, Tong, Chi Hay   +3 more
core   +1 more source

AD Leonis: Radial Velocity Signal of Stellar Rotation or Spin–Orbit Resonance? [PDF]

, 2018
AD Leonis is a nearby magnetically active M dwarf. We find Doppler variability with a period of 2.23 days, as well as photometric signals: (1) a short-period signal, which is similar to the radial velocity signal, albeit with considerable variability ...
Anglada-Escudé G., Anglada-Escudé G., Anglada-Escudé G., Barnes J. R., Buccino A. P., Butler R. P., Collier Cameron A. ed Boffin H. M. J., Cutri R. M., Delfosse X., Dressing C. D., Engle S. G., Feng F., Guillem Anglada-Escudé, Houdebine E. R., Hugh R. A. Jones, Hunt-Walker N. M., Hut P., Jenkins J. S., John R. Barnes, Johnson J. A., Kaipio J., Kiraga M., Marcin Kiraga, Mayor M., McQuillan A., Mikko Tuomi, Morton T. D., Newton E. R., Pojmański G., Pojmański G., R. Paul Butler, Robertson P., Rojas-Ayala B., Shkolnik E., Steven S. Vogt, Teitler S., Tuomi M., Vogt S., Winters J. G., Zacharias N.   +39 more
core   +6 more sources

The newfound relationship between extrachromosomal DNAs and excised signal circles

FEBS Letters, EarlyView.
Extrachromosomal DNAs (ecDNAs) contribute to the progression of many human cancers. In addition, circular DNA by‐products of V(D)J recombination, excised signal circles (ESCs), have roles in cancer progression but have largely been overlooked. In this Review, we explore the roles of ecDNAs and ESCs in cancer development, and highlight why these ...
Dylan Casey, Zeqian Gao, Joan Boyes
wiley   +1 more source