Results 41 to 50 of about 19,683 (177)

No-reference image quality assessment through the von Mises distribution [PDF]

, 2012
An innovative way of calculating the von Mises distribution (VMD) of image entropy is introduced in this paper. The VMD's concentration parameter and some fitness parameter that will be later defined, have been analyzed in the experimental part for ...
Ciocca, Claasen, Cohen, Conrad, Ferzli, Gabarda, Gabriel Cristóbal, Jacobson, Ponomarenko, Redi, Salvador Gabarda, Snelson, Stankovic, Stephens, Valdecasas, von Mises, Wigner, Williams, Zhu, Zyczkowski   +19 more
core   +3 more sources

What If Each Voxel Were Measured With a Different Diffusion Protocol?

Magnetic Resonance in Medicine, Volume 95, Issue 4, Page 2277-2290, April 2026.
ABSTRACT Purpose Expansion of diffusion MRI (dMRI) both into the realm of strong gradients and into accessible imaging with portable low‐field devices brings about the challenge of gradient nonlinearities. Spatial variations of the diffusion gradients make diffusion weightings and directions non‐uniform across the field of view, and deform perfect ...
Santiago Coelho, Gregory Lemberskiy, Ante Zhu, Hong‐Hsi Lee, Nastaren Abad, Thomas K. F. Foo, Els Fieremans, Dmitry S. Novikov   +7 more
wiley   +1 more source

Wigner function for twisted photons

, 2008
A comprehensive theory of the Weyl-Wigner formalism for the canonical pair angle-angular momentum is presented, with special emphasis in the implications of rotational periodicity and angular-momentum discreteness.Comment: 6 pages, 4 ...
A. A. Kirillov, A. B. Klimov, A. B. Klimov, A. B. Klimov, A. O. Barut, A. Vaziri, A. Vourdas, B. Kostant, C. Brif, D. Mumford, E. P. Wigner, F. A. Berezin, F. E. Schroeck Jr., G. Molina-Terriza, G. S. Agarwal, G. S. Agarwal, G. W. Mackey, H. A. Kastrup, H. Weyl, H.-W. Lee, I. Rigas, I. Rigas, J. Bertrand, J. C. Varilly, J. E. Moyal, J. F. Plebański, J. P. Bizarro, J. Schwinger, J. Řehaček, J. Řeháček, K. Kowalski, L. L. Sánchez Soto, L. M. Nieto, M. A. Nielsen, M. G. Benedict, M. Hillery, N. L. Balazs, N. M. Atakishiyev, N. Mukunda, N. Mukunda, P. Carruthers, R. L. Stratonovich, S. Franke-Arnold, W. H. Louisell, Z. Hradil   +44 more
core   +1 more source

Ion and Solvent Dynamics in Charged 2D Clay Nanoslits with Unprecedented Ångström‐Precise Slit Height Control

Advanced Functional Materials, Volume 36, Issue 8, 26 January 2026.
The slit height of fluorohectorite 2D‐nanochannels is tuned with Å‐precision (2.4–250 Å). Slit‐height‐dependent ion and water mobilities are quantified by applying EIS, PFG‐NMR, and SFG‐NMR with MD simulations guiding interpretation. Diffuse properties are investigated with CP‐AFM, MD, and PB.
Max Stevenson, Sandra Pappler, Leonie Kanzler, Aqsa Nisar, Jepsinraj Kakkuzhiyulla Parambath, Markus Rosenstihl, Flora Lebeda, Sebastian Weiß, Georg Papastavrou, Michael Vogel, Jürgen Senker, Josef Breu   +11 more
wiley   +1 more source

A dynamical point of view of Quantum Information: Wigner measures

, 2011
We analyze a known version of the discrete Wigner function and some connections with Quantum Iterated Funcion Systems. This paper is a follow up of "A dynamical point of view of Quantum Information: entropy and pressure" by the same ...
Baraviera, A., Cunha, M. Terra, Lardizabal, C. F., Lopes, A. O.   +3 more
core   +1 more source

Quantum Jumps in Amplitude Bistability: Tracking a Coherent and Invertible State Localization

Annalen der Physik, Volume 538, Issue 1, January 2026.
A notable asymmetry is shown to characterize the bistable switching between macroscopic metastable states of light in the strong‐coupling limit of radiation–matter interaction. Transitions from the vacuum to a highly excited state correlate with a highly bunched sequence of emitted photons, while a downward switch to the vacuum involves a coherent ...
Th. K. Mavrogordatos
wiley   +1 more source

A theorem concerning Fourier transforms: A survey

Journal of the London Mathematical Society, Volume 113, Issue 1, January 2026.
Abstract In this note, we highlight the impact of the paper G. H. Hardy, A theorem concerning Fourier transforms, J. Lond. Math. Soc. (1) 8 (1933), 227–231 in the community of harmonic analysis in the last 90 years, reviewing, on one hand, the direct generalizations of the main results and, on the other hand, the different connections to related areas ...
Aingeru Fernández‐Bertolin, Luis Vega
wiley   +1 more source

Pilot‐Based Iterative Path Estimation and Maximum Ratio Combining (MRC)–Based Signal Detection of Orthogonal Time–Frequency Space (OTFS) Modulation for 6G in Fractional Doppler Channels

Journal of Computer Networks and Communications, Volume 2026, Issue 1, 2026.
The sixth generation (6G) wireless networks are used to provide a large coverage, and also this generation needed to support different emerging applications in harsh areas with higher user equipment mobility. For the above case, a new modulation technique called orthogonal time–frequency space (OTFS) modulation has emerged as a promising technique to ...
Ephrem Gelamite Demere, Zelalem Hailu Gebeyehu, Sohini Basu Roy   +2 more
wiley   +1 more source

Emerging Opportunities of Metal Nanoclusters for Photocatalytic Organic Synthesis

Aggregate, Volume 6, Issue 12, December 2025.
Atomically precise metal nanoclusters have emerged as versatile photocatalysts for photo‐induced organic reactions. This review comprehensively summarizes recent advances in this cutting‐edge research field. We begin the discussion with a brief introduction of metal nanoclusters and the fundamental principles of photocatalysis.
Chun‐Lian Lin, Wenjing Qian, Hui Guo, Weigang Fan, Man‐Bo Li   +4 more
wiley   +1 more source

Optimal waveform estimation for classical and quantum systems via time-symmetric smoothing. II. Applications to atomic magnetometry and Hardy's paradox

, 2009
The quantum smoothing theory [Tsang, Phys. Rev. Lett. 102, 250403 (2009); Phys. Rev. A, in press (e-print arXiv:0906.4133)] is extended to account for discrete jumps in the classical random process to be estimated, discrete variables in the quantum ...
Tsang, Mankei
core   +1 more source