Results 81 to 90 of about 801,834 (293)

Allen Telescope Array Multi-Frequency Observations of the Sun

, 2011
We present the first observations of the Sun with the Allen Telescope Array (ATA). We used up to six frequencies, from 1.43 to 6 GHz, and baselines from 6 to 300 m.
B.B. Krissinel’, C. Gutierrez-Kraybill, C.J. Law, C.L. Selhorst, C.L. Selhorst, C.L. Selhorst, E. Landi, E. Landi, E.Y. Zlotnik, E.Y. Zlotnik, G. C. Bower, G. J. Hurford, G. Keating, G. Keating, G.A. Dulk, G.B. Gelfreikh, H. Zirin, J. Welch, J.A. Högbom, J.W. Lee, K. Shibasaki, K.F. Tapping, M.J. Aschwanden, P. Saint-Hilaire, R.J. Sault, S.M. White, V.N. Borovik, W.N. Christiansen   +27 more
core   +1 more source

Fault detection of converter valve based on the combination of fault tree analysis and multi-frequency impedance testing

Frontiers in Energy Research
Converter valves include numerous components in thyristor-level damping, voltage-sharing, and power-tapping circuits, and their complex structure makes it difficult for conventional impedance tests to localize faults beyond qualitative valve-level ...
Xintong Mao, Huilong Zhao, Kangxin Cai, Baitao Zhang, Wei Liu, Zhiwei Liu, Yunfei Liu, Zhihao Xing, Yong Lu, Jianyong Zheng   +9 more
doaj   +1 more source

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

Dynamics of multi-frequency oscillator ensembles with resonant coupling

, 2011
We study dynamics of populations of resonantly coupled oscillators having different frequencies. Starting from the coupled van der Pol equations we derive the Kuramoto-type phase model for the situation, where the natural frequencies of two interacting ...
A. Pikovsky, Cross, Daido, Daido, Daido, Eckhardt, Glova, Golomb, Ilic, Kaneko, Kiss, Kiss, Kiss, Kiss, Komarov, Kuramoto, Kuramoto, Martens, Mertens, Néda, Ott, Ott, Pazó, Pikovsky, Pikovsky, Pikovsky, Pikovsky, Pikovsky, S. Lück, Sakaguchi, Strogatz, Strogatz, Watanabe, Watanabe, Wiesenfeld, Zalalutdinov   +35 more
core   +1 more source

Multi-Frequency Based Direction-of-Arrival Estimation for 2q-Level Nested Radar & Sonar Arrays

Sensors, 2018
Direction finding is a hot research area in radar and sonar systems. In the case of q ≥ 2, the 2qth-order cumulant based direction of arrival (DOA) estimation algorithm for the 2q-level nested array can achieve high resolution performance.
Hao Zhou, Guoping Hu, Junpeng Shi, Ziang Feng   +3 more
doaj   +1 more source

Gut microbiome and aging—A dynamic interplay of microbes, metabolites, and the immune system

FEBS Letters, EarlyView.
Age‐dependent shifts in microbial communities engender shifts in microbial metabolite profiles. These in turn drive shifts in barrier surface permeability of the gut and brain and induce immune activation. When paired with preexisting age‐related chronic inflammation this increases the risk of neuroinflammation and neurodegenerative diseases.
Aaron Mehl, Eran Blacher
wiley   +1 more source

Multi-frequency VLBI observations of NRAO 530 [PDF]

Astronomy & Astrophysics, 2006
We report on VLBA observations of a gamma-ray bright blazar NRAO 530 at multiple frequencies (5, 8, 15, 22, 39, 43, and 45 GHz) in 1997 and 1999. These multi-epoch multi-frequency high-resolution VLBI images exhibit a consistent core-dominated morphology with a bending jet to the north of the core.
Feng, S. -W., Shen, Z. -Q., Cai, H. -B., Chen, X., Lu, R. -S., Huang, L.   +5 more
openaire   +2 more sources

Fusion of Arctic sea ice drift results from multi-frequency and multi-polarization AMSR2 data using a random forest approach

International Journal of Digital Earth
Accurate monitoring of sea ice drift has become increasingly crucial for climate research and safe navigation in polar regions. Existing sea ice drift extraction methods based on passive microwave data utilize single-frequency data, which have ...
Peng Jiang, Tiantian Feng, Yushi Yang, Xiaomin Liu, Tong Hao   +4 more
doaj   +1 more source

Diversity and complexity in neural organoids

FEBS Letters, EarlyView.
Neural organoid research aims to expand genetic diversity on one side and increase tissue complexity on the other. Chimeroids integrate multiple donor genomes within single organoids. Self‐organising multi‐identity organoids, exogenous cell seeding, or enforced assembly of region‐specific organoids contribute to tissue complexity.
Ilaria Chiaradia, Madeline A. Lancaster
wiley   +1 more source

An Iterative Procedure for Combining the Advantages of a Multi-Frequency and Multi-Resolution Inversion Algorithm [PDF]

, 2011
Starting from the iterative multi ]scaling approach previously studied for monochromatic illuminations, two multi ]resolution strategies for dealing with multi ]frequency inverse scattering experiments have been developed. The first procedure is based on
Donelli, Massimo, Franceschini, Davide, Massa, Andrea, Tamanini, E   +3 more
core