Results 31 to 40 of about 43,755 (258)

3D mixed finite elements for curved, flat piezoelectric structures

open access: yesInternational Journal of Smart and Nano Materials, 2019
The Tangential-Displacement Normal-Normal-Stress (TDNNS) method is a finite element method that was originally introduced for elastic solids and later extended to piezoelectric materials.
Martin Meindlhumer, Astrid Pechstein
doaj   +1 more source

Vertices and polarizations for homogeneous polynomials

open access: yesAdvances in Mathematics, 1980
In [9] we showed that the process of building a r*-frame as in [5] for an ideal J contained in a power series ring k[ [x, ,..., x,,]] over a characteristic zero field k can be related to the construction of a Morin-Mather frame as in [6] by the discussion of the concept of the polarization map.
Hipps, N.   +2 more
openaire   +2 more sources

3D Pattern Synthesis of Time-Modulated Conformal Arrays with a Multiobjective Optimization Approach

open access: yesInternational Journal of Antennas and Propagation, 2014
This paper addresses the synthesis of the three-dimensional (3D) radiation patterns of the time-modulated conformal arrays. Due to the nature of periodic time modulation, harmonic radiation patterns are generated at the multiples of the modulation ...
Wentao Li   +3 more
doaj   +1 more source

Next-to-Leading order approximation of polarized valon and parton distributions

open access: yes, 2004
Polarized parton distributions and structure functions of the nucleon are analyzed in the improved valon model. The valon representation provides a model to represent hadrons in terms of quarks, providing a unified description of bound state and ...
A Mirjalili   +18 more
core   +1 more source

Cosmological 21cm experiments: Searching for a needle in a haystack [PDF]

open access: yes, 2010
There are several planned and ongoing experiments designed to explore the Epoch of Reionization (EoR), the pivotal period during which the gas in the intergalactic medium went from being entirely neutral to almost entirely ionized. These experiments will
Jelic, Vibor
core   +4 more sources

Inequalities concerning polar derivative of polynomials

open access: yesAnnales UMCS, Mathematica, 2011
In this paper we obtain certain results for the polar derivative of a polynomial \(p(z) = c_nz^n +\sum_{j=\mu}^n c_{n-j}z^{n-j}\), \(1\leq\mu\leq n\), having all its zeros on \(|z| = k\), \(k\leq 1\), which generalizes the results due to Dewan and Mir, Dewan and Hans.
Ahuja, Arty, Dewan, K. K., Hans, Sunil
openaire   +2 more sources

Imaging of Biphoton States: Fundamentals and Applications

open access: yesAdvanced Functional Materials, EarlyView.
Quantum states of two photons exhibit a rich polarization and spatial structure, which provides a fundamental resource of strongly correlated and entangled states. This review analyzes the physics of these intriguing properties and explores the various techniques and technologies available to measure them, including the state of the art of their ...
Alessio D'Errico, Ebrahim Karimi
wiley   +1 more source

Exploring the Capability of Compact Polarimetry (Hybrid Pol) C Band RISAT-1 Data for Land Cover Classification

open access: yesIEEE Access, 2018
Compact Polarimetry has gained significant importance in recent years among other earth observation missions due to its low power consumption, simple architecture, and larger swath width. For space-based SAR systems, these parameters are vital to monitor
Kiran Dasari, Anjaneyulu Lokam
doaj   +1 more source

Varieties of sums of powers and moduli spaces of (1,7)-polarized abelian surfaces

open access: yes, 2017
We study the geometry of some varieties of sums of powers related to the Klein quartic. This allows us to describe the birational geometry of certain moduli spaces of abelian surfaces.
Bolognesi, Michele, Massarenti, Alex
core   +3 more sources

Nucleation‐Controlled Reconstruction of CuOx for Selective CO2 Electroreduction

open access: yesAdvanced Functional Materials, EarlyView.
The ratio of oxygen vacancies (Ov) and exposed Cu2O (111)/(200) of CuOx precatalyst is modulated by nucleation control of Cu(OH)2 precursor. Low Ov ratio and high ratio of Cu2O (111)/(200) in slow‐nucleated CuOx reconstructs to high‐coordinated oxide‐derived copper (OD‐Cu) during electrochemical CO2 reduction reaction (CO2RR) and exhibits enhanced ...
Ying Ying Ch'ng   +14 more
wiley   +1 more source

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