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Psychiatry Research, ISSN 0165-1781, 2014, Volume 225, Issue 3, pp. 368 - 373
Journal Article
Applied and Computational Harmonic Analysis, ISSN 1063-5203, 11/2016, Volume 41, Issue 3, pp. 677 - 691
We consider smoothness properties of the generator of a principal Gabor space on the real line which is invariant under some additional translation–modulation... 
Time–frequency analysis | Feichtinger algebra | Balian–Low theorem | Additional shift invariance | Gabor frames | Time-frequency analysis | MATHEMATICS, APPLIED | SPACES | PHYSICS, MATHEMATICAL | Balian-Low theorem
Journal Article
Journal of Dynamics and Differential Equations, ISSN 1040-7294, 6/2016, Volume 28, Issue 2, pp. 533 - 566
Journal Article
Digital Signal Processing, ISSN 1051-2004, 10/2017, Volume 69, pp. 162 - 173
Sparse representation and Dictionary learning have attracted a lot of research attention in the last couple of decades and have provided state of the art... 
Sparse representation | Flexible Structure Dictionary learning | Dictionary learning | Shift-invariant dictionary | ALGORITHM | K-SVD | ENGINEERING, ELECTRICAL & ELECTRONIC | Usage | Data mining | Analysis | Machine learning
Journal Article
Astrophysical Journal, ISSN 0004-637X, 01/2017, Volume 834, Issue 2, p. 194
The hypothesis is made that, at large scales where general relativity may be applied, empty space is scale invariant. This establishes a relation between the... 
Scale invariance | Red shift | Numerical integration | Parameters | Braking | Relativity | Universe | Invariance | Density | Invariants | Cosmological constant | Flux density | Cosmology | Hubble constant | Mathematical models | Acceleration | Expansion
Journal Article
Communications in Mathematical Physics, ISSN 0010-3616, 3/2017, Volume 350, Issue 3, pp. 985 - 1016
In this paper, we provide an elementary, unified treatment of two distinct blue-shift instabilities for the scalar wave equation on a fixed Kerr black hole... 
Quantum Physics | Mathematical Physics | Classical and Quantum Gravitation, Relativity Theory | Theoretical, Mathematical and Computational Physics | Complex Systems | Physics | LINEAR SCALAR FIELDS | PERTURBATIONS | DECAY | INTERIOR | STABILITY | WAVE-EQUATION | CAUCHY HORIZON | PHYSICS, MATHEMATICAL | Censorship | Atmospheric physics | Radiation
Journal Article
Journal of Mathematical Analysis and Applications, ISSN 0022-247X, 06/2019, Volume 474, Issue 2, pp. 1289 - 1305
We study extra time-frequency shift invariance properties of Gabor spaces. For a Gabor space generated by an integer lattice, we state and prove several... 
Gabor space | Time-frequency analysis | Extra time-frequency shift invariance | Shift-invariant space | MATHEMATICS | MATHEMATICS, APPLIED
Journal Article
Microwave and Optical Technology Letters, ISSN 0895-2477, 10/2019, Volume 61, Issue 10, pp. 2295 - 2305
The use of photonic band gap (PBG) substrates with noncylindrical holes in microstrip antennas is little reported in the literature. In this article, a 3D... 
quadratic holes | microstrip antennas | frequency shift | simulation time | PBG substrate | OPTICS | ENGINEERING, ELECTRICAL & ELECTRONIC | Acrylonitrile | Antennas (Electronics) | Three dimensional printing | Computer simulation | Cylindrical antennas | Bandwidth | Microstrip antennas | Current distribution | Butadiene | Substrates | Photonic band gaps | Photonics
Journal Article
Applied and Computational Harmonic Analysis, ISSN 1063-5203, 09/2016, Volume 41, Issue 2, pp. 660 - 676
Given an arbitrary finite set of data F={f1,…,fm}⊂L2(Rd) we prove the existence and show how to construct a “small shift invariant space” that is “closest” to... 
Extra-invariance | Paley–Wiener spaces | Sampling | Shift invariant spaces | L(R(D)) | MATHEMATICS, APPLIED | BASES | SPACES | Paley-Wiener spaces | PHYSICS, MATHEMATICAL | Mathematics - Functional Analysis
Journal Article
Digital Signal Processing, ISSN 1051-2004, 12/2018, Volume 83, pp. 261 - 270
In this paper, we propose a beamspace-based method for nominal direction-of-arrival (DOA) and angular spread estimation of incoherently distributed (ID)... 
Direction-of-arrival (DOA) | Angular spread | Uniform linear array (ULA) | Beamspace shift invariance | Incoherently distributed (ID) sources | LOCALIZATION | MAXIMUM-LIKELIHOOD | ARRAY | ALGORITHM | ESPRIT | ENGINEERING, ELECTRICAL & ELECTRONIC | DIRECTION-OF-ARRIVAL | DOA | ANGLES | SPREAD | Analysis | Methods | Algorithms
Journal Article
Journal of Cosmology and Astroparticle Physics, ISSN 1475-7516, 06/2017, Volume 2017, Issue 6, pp. 7 - 7
The remarkable properties of the geodesic light-cone (GLC) coordinates allow analytic expressions for the light-cone observables, providing a new... 
Cosmological perturbation theory | gravitational lensing | gravity | cosmological perturbation theory | ASTRONOMY & ASTROPHYSICS | PHYSICS, PARTICLES & FIELDS | LUMINOSITY | RED SHIFT | DISTANCE | LIGHT CONE | ASTROPHYSICS, COSMOLOGY AND ASTRONOMY | PERTURBATION THEORY | UNIVERSE | GAUGE INVARIANCE | COMPUTERIZED SIMULATION
Journal Article