Results 61 to 70 of about 1,238,186 (282)

Revealing the structure of land plant photosystem II: the journey from negative‐stain EM to cryo‐EM

FEBS Letters, EarlyView.
Advances in cryo‐EM have revealed the detailed structure of Photosystem II, a key protein complex driving photosynthesis. This review traces the journey from early low‐resolution images to high‐resolution models, highlighting how these discoveries deepen our understanding of light harvesting and energy conversion in plants.
Roman Kouřil
wiley   +1 more source

Physics-informed neural networks coupled with a residual-driven dynamic weighted Huber loss function

New Journal of Physics
Physics-informed neural networks (PINNs) commonly use the mean squared error (MSE) as the loss function. However, this MSE is sensitive to high-residual regions and noise, often causing nonconvergence, overfitting, and loss imbalance during training.
Xia-Ting Jing, Yu-Long Bai, Bo-Ya Hou, Chun-lin Huang   +3 more
doaj   +1 more source

Experimental Study on the Effect of Urban Road Traffic Noise on Heart Rate Variability of Noise-Sensitive People

Frontiers in Psychology, 2022
Epidemiological studies have confirmed that long-term exposure to road traffic noise can cause cardiovascular diseases (CDs), and when noise exposure reaches a certain level, the risk of related CDs significantly increases.
Chao Cai, Yanan Xu, Yan Wang, Qikun Wang, Lu Liu   +4 more
doaj   +1 more source

Spatiotemporal and quantitative analyses of phosphoinositides – fluorescent probe—and mass spectrometry‐based approaches

FEBS Letters, EarlyView.
Fluorescent probes allow dynamic visualization of phosphoinositides in living cells (left), whereas mass spectrometry provides high‐sensitivity, isomer‐resolved quantitation (right). Their synergistic use captures complementary aspects of lipid signaling. This review illustrates how these approaches reveal the spatiotemporal regulation and quantitative
Hiroaki Kajiho, Shin Morioka, Junko Sasaki, Takehiko Sasaki   +3 more
wiley   +1 more source

Design of Offset–Free Predictive Control with State–Space Models: Equivalences and New Results

International Journal of Applied Mathematics and Computer Science
Design of offset-free model predictive control (MPC) with a linear state-space process model is discussed in the paper, for deterministic constant or asymptotically constant external and internal (modeling errors) disturbances.
Tatjewski Piotr
doaj   +1 more source

Improving Error Estimates for Evaluating Satellite-Based Atmospheric CO₂ Measurement Concepts through Numerical Simulations

Remote Sensing
To assess the accuracy of satellite monitoring of anthropogenic CO2 emissions, inversions of satellite data in SWIR are usually combined with the assimilation of the total CO2 column into a Kalman filter that reconstructs the sources and sinks of ...
Bruna Barbosa Silveira, Vincent Cassé, Olivier Chomette, Cyril Crevoisier   +3 more
doaj   +1 more source

Evanescent field optical readout of graphene mechanical motion at room temperature [PDF]

, 2014
Graphene mechanical resonators have recently attracted considerable attention for use in precision force and mass sensing applications. To date, readout of their oscillatory motion has typically required cryogenic conditions to achieve high sensitivity ...
Adiga, Vivek P., Bowen, Warwick P., Brawley, George A., Cole, Robin M., Craighead, Harold G., De Alba, Roberto, Ilic, Bojan, Parpia, Jeevak M.   +7 more
core   +2 more sources

Calpain small subunit homodimerization is robust and calcium‐independent

FEBS Letters, EarlyView.
Calpains dimerize via penta‐EF‐hand (PEF) domains. Using single‐molecule force spectroscopy, we measured the strength and kinetics of PEF–PEF homodimer binding. The interaction is robust, shows a transient conformational step before dissociation, and remains largely insensitive to Ca2+.
Nesha May O. Andoy, Trina Dykstra‐MacPherson, Mathias A. Bell, Peter L. Davies, Ruby May A. Sullan   +4 more
wiley   +1 more source

Resources of polarimetric sensitivity in spin noise spectroscopy

, 2013
We attract attention to the fact that the ultimate (shot-noise-limited) polarimetric sensitivity can be enhanced by orders of magnitude leaving the photon flux incident onto the photodetector on the same low level.
Bayer, M., Glasenapp, P., Greilich, A., Kozlov, G. G., Ryzhov, I. I., Yakovlev, D. R., Zapasskii, V. S.   +6 more
core   +1 more source

The noise properties of 42 millisecond pulsars from the European Pulsar Timing Array and their impact on gravitational wave searches [PDF]

, 2016
The sensitivity of Pulsar Timing Arrays to gravitational waves depends on the noise present in the individual pulsar timing data. Noise may be either intrinsic or extrinsic to the pulsar.
Babak, S., Bassa, C. G., Brem, P., Burgay, M., Caballero, R. N., Champion, D. J., Cognard, I., Desvignes, G., Gair, J. R., Graikou, E., Guillemot, L., Hessels, J. W. T., Janssen, G. H., Karuppusamy, R., Kramer, M., Lassus, A., Lazarus, P., Lee, K. J., Lentati, L., Liu, K., McKee, J., Mingarelli, C. M. F., Osłowski, S., Perrodin, D., Petiteau, A., Possenti, A., Purver, M. B., Rosado, P. A., Sanidas, S., Sesana, A., Shaifullah, G., Smits, R., Stappers, B. W., Taylor, S. R., Theureau, G., Tiburzi, C., van Haasteren, R., Vecchio, A., Verbiest, J. P. W.   +38 more
core   +8 more sources