Results 41 to 50 of about 346,351 (271)

Contributions to harmonic analysis

open access: yesActa Mathematica, 1956
Let G be a locally compact abelian group, G its dual. For any ideal I of L'(G) let cosp(I) denote the cospectrum of I; this is defined as the closed set in G formed by the common zeros of the Fourier transforms of all functions in I. Consider two closed ideals I, I2 with disjoint cospectra.
openaire   +3 more sources

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

open access: yesFEBS 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   +2 more
wiley   +1 more source

Calculation of Rotor Harmonic Losses in Multiphase Induction Machines

open access: yesMachines, 2022
The topic of this paper is the determination of rotor harmonic losses in multiphase machines. Specifically, harmonic losses occur in the rotor winding and core due to higher-order spatial harmonics of the flux density.
Bogdan Brkovic, Milos Jecmenica
doaj   +1 more source

Harmonic Superspaces and Superconformal Fields [PDF]

open access: yes, 2000
Representations of four-dimensional superconformal groups on harmonic superfields are discussed. It is argued that any representation can be given as a superfield on many superflag manifolds.
Heslop, P., Howe, P. S.
core   +2 more sources

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

open access: yesFEBS 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   +2 more
wiley   +1 more source

Azimuthal anisotropy: the higher harmonics

open access: yes, 2004
We report the first observations of the fourth harmonic (v_4) in the azimuthal distribution of particles at RHIC. The measurement was done taking advantage of the large elliptic flow generated at RHIC.
Adams, J.   +359 more
core   +3 more sources

DC-electric-field-induced and low-frequency electromodulation second-harmonic generation spectroscopy of Si(001)-SiO$_2$ interfaces [PDF]

open access: yes, 1998
The mechanism of DC-Electric-Field-Induced Second-Harmonic (EFISH) generation at weakly nonlinear buried Si(001)-SiO$_2$ interfaces is studied experimentally in planar Si(001)-SiO$_2$-Cr MOS structures by optical second-harmonic generation (SHG ...
A. A. Fedyanin   +71 more
core   +2 more sources

Adaptaquin is selectively toxic to glioma stem cells through disruption of iron and cholesterol metabolism

open access: yesMolecular Oncology, EarlyView.
Adaptaquin selectively kills glioma stem cells while sparing differentiated brain cells. Transcriptomic and proteomic analyses show Adaptaquin disrupts iron and cholesterol homeostasis, with iron chelation amplifying cytotoxicity via cholesterol depletion, mitochondrial dysfunction, and elevated reactive oxygen species.
Adrien M. Vaquié   +16 more
wiley   +1 more source

Magnetospheric contributions to geomagnetic daily variations [PDF]

open access: yesAnnales Geophysicae, 1996
The contribution of magnetospheric current systems to geomagnetic daily variations is analyzed by means of a spherical harmonic analysis (SHA) using elementary models as well as the Tsyganenko model of the magnetosphere.
N. Olsen
doaj   +1 more source

Effects of single-particle potentials on the level density parameter

open access: yes, 2014
The new definition of the energy dependence for the level density parameter including collective effects depends strongly on the semi-classical approach. For this method, defining an accurate single-particle potential is of great importance.
Babacan, Halil   +3 more
core   +1 more source

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