Results 61 to 70 of about 1,144,435 (297)

Dynamic Features of Spectra of Single and Quasi-Periodic Measuring Signals

Приборы и методы измерений, 2022
Solving the problems of spectral processing of single and quasi-periodic signals in measurement and diagnostic systems is directly related to their isolation against the background of external interference or noise.
U. V. Suchodolov, A. V. Isaev, A. A. Sheinikau   +2 more
doaj   +1 more source

Universality near zero virtuality

, 1996
In this paper we study a random matrix model with the chiral and flavor structure of the QCD Dirac operator and a temperature dependence given by the lowest Matsubara frequency. Using the supersymmetric method for random matrix theory, we obtain an exact,
A.D. Jackson, Andreev, Andreev, Banks, Beenakker, Beenakker, Berry, Bohigas, Bohigas, Bronk, Brézin, Brézin, Brézin, Chandrasekharan, Chandrasekharan, Deus, Efetov, Forrester, Fox, Gräf, Guhr, Guhr, Hackenbroich, Halasz, Haq, Iida, J.J.M. Verbaarschot, Jackson, Kocić, Kocić, Leutwyler, M.K. Şener, McKane, Nagao, Nagao, Nagao, Porter, Pruisken, Schäfer, Seligman, Seligman, Shuryak, Slevin, Stephanov, Stone, Tracy, Verbaarachot, Verbaarschot, Verbaarschot, Verbaarschot, Verbaarschot, Verbaarschot, Verbaarschot, Wettig   +53 more
core   +1 more source

A new model for the structure of the DACs and SACs regions in the Oe and Be stellar atmospheres [PDF]

, 2007
In this paper we present a new mathematical model for the density regions where a specific spectral line and its SACs/DACs are created in the Oe and Be stellar atmospheres.
Antoniou, A., Danezis, E., Dimitrijević, M. S., Lyratzi, E., Nikolaidis, D., Popović, L. Č., Theodosiou, E.   +6 more
core   +1 more source

Sequence determinants of RNA G‐quadruplex unfolding by Arg‐rich regions

FEBS Letters, EarlyView.
We show that Arg‐rich peptides selectively unfold RNA G‐quadruplexes, but not RNA stem‐loops or DNA/RNA duplexes. This length‐dependent activity is inhibited by acidic residues and is conserved among SR and SR‐related proteins (SRSF1, SRSF3, SRSF9, U1‐70K, and U2AF1).
Naiduwadura Ivon Upekala De Silva, Puspa Kunwar, Md Ibnul Rifat Rahman, Joanna Koryo Kwao, Nathan Lehman, Zihan Zhang, Trenton Paul, Claire Cheng, Nicholas Truex, Hui‐Ting Lee, Jun Zhang   +10 more
wiley   +1 more source

Spectral density of individual trajectories of an active Brownian particle

New Journal of Physics, 2022
We study analytically the single-trajectory spectral density (STSD) of an active Brownian motion (BM) as exhibited, for example, by the dynamics of a chemically-active Janus colloid. We evaluate the standardly-defined spectral density, i.e.
Alessio Squarcini, Alexandre Solon, Gleb Oshanin   +2 more
doaj   +1 more source

Perturbations of diagonal matrices by band random matrices [PDF]

, 2011
We exhibit an explicit formula for the spectral density of a (large) random matrix which is a diagonal matrix whose spectral density converges, perturbated by the addition of a symmetric matrix with Gaussian entries and a given (small) limiting variance ...
Benaych-Georges, Florent, Enriquez, Nathanaël   +1 more
core   +3 more sources

The Density of States and the Spectral Shift Density of Random Schroedinger Operators

, 2000
In this article we continue our analysis of Schroedinger operators with a random potential using scattering theory. In particular the theory of Krein's spectral shift function leads to an alternative construction of the density of states in arbitrary ...
Barbaroux J. M., Chahrour A., Kirsch W., Lifshitz I. M., Nakao S., ROBERT SCHRADER, Sh M., Sh M., Sh M., Sh M., Stollmann P., VADIM KOSTRYKIN   +11 more
core   +1 more source

Structural instability impairs function of the UDP‐xylose synthase 1 Ile181Asn variant associated with short‐stature genetic syndrome in humans

FEBS Letters, EarlyView.
The Ile181Asn variant of human UDP‐xylose synthase (hUXS1), associated with a short‐stature genetic syndrome, has previously been reported as inactive. Our findings demonstrate that Ile181Asn‐hUXS1 retains catalytic activity similar to the wild‐type but exhibits reduced stability, a looser oligomeric state, and an increased tendency to precipitate ...
Tuo Li, Pedro A. Sánchez‐Murcia, Bernd Nidetzky   +2 more
wiley   +1 more source

Probing High Frequency Noise with Macroscopic Resonant Tunneling

, 2011
We have developed a method for extracting the high-frequency noise spectral density of an rf-SQUID flux qubit from macroscopic resonant tunneling (MRT) rate measurements.
Altomare, F., Amin, M. H. S., Averin, D. V., Berkley, A. J., Bunyk, P., Gildert, S., Harris, R., Johansson, J., Johnson, M. W., Ladizinsky, E., Lanting, T., Tolkacheva, E.   +11 more
core   +1 more source

β‐TrCP overexpression enhances cisplatin sensitivity by depleting BRCA1

Molecular Oncology, EarlyView.
Low levels of β‐TrCP (Panel A) allow the accumulation of BRCA1 and CtIP, which facilitate the repair of cisplatin‐induced DNA damage via homologous recombination (HR) and promote tumor cell survival. In contrast, high β‐TrCP expression (Panel B) leads to BRCA1 and CtIP degradation, impairing HR repair, resulting in persistent DNA damage and apoptosis ...
Rocío Jiménez‐Guerrero, Alejandro Belmonte‐Fernández, Mónica González‐Moreno, Laura Rodríguez‐Cordero, Begoña Pérez‐Valderrama, Joaquín Herrero‐Ruíz, Francisco Romero, Carmen Sáez, Miguel Á. Japón   +8 more
wiley   +1 more source