Results 51 to 60 of about 210,996 (288)

Temporal Extension of Scale Pyramid and Spatial Pyramid Matching for Action Recognition [PDF]

open access: yes, 2014
Historically, researchers in the field have spent a great deal of effort to create image representations that have scale invariance and retain spatial location information.
Hauptmann, Alexandar G.   +2 more
core  

Extension complexities of Cartesian products involving a pyramid [PDF]

open access: yesInformation Processing Letters, 2017
It is an open question whether the linear extension complexity of the Cartesian product of two polytopes P, Q is the sum of the extension complexities of P and Q. We give an affirmative answer to this question for the case that one of the two polytopes is a pyramid.
Tiwary, Hans R.   +2 more
openaire   +4 more sources

SPG4 and Dementia: Expanding the Clinical Spectrum

open access: yesAnnals of Clinical and Translational Neurology, EarlyView.
ABSTRACT Objective Hereditary spastic paraplegia (HSP) is a group of disorders characterized by progressive spasticity and lower limb weakness, with mutations in SPG4/SPAST being the most common cause. Detailed studies and clinical and molecular comparisons across different populations are missing.
Emanuele Panza   +19 more
wiley   +1 more source

Variation around a Pyramid theme: optical recombination and optimal use of photons

open access: yes, 2015
We propose a new type of Wave Front Sensor (WFS) derived from the Pyramid WFS (PWFS). This new WFS, called the Flattened Pyramid-WFS (FPWFS), has a reduced Pyramid angle in order to optically overlap the four pupil images into an unique intensity.
Fauvarque, O.   +3 more
core   +3 more sources

On two conjectures of Maurer concerning basis graphs of matroids [PDF]

open access: yes, 2015
We characterize 2-dimensional complexes associated canonically with basis graphs of matroids as simply connected triangle-square complexes satisfying some local conditions. This proves a version of a (disproved) conjecture by Stephen Maurer (Conjecture 3
Chalopin, Jérémie   +2 more
core   +3 more sources

Pyramidal Structures on Yttria‐Stabilized Zirconia after High Temperature Exposure at 1500°C: New Features on an Old Material

open access: yesAdvanced Engineering Materials, EarlyView.
New features on yttria‐stabilized zirconia after exposure at 1500°C: Newly discovered pyramidal structures on an old material. After exposure at 1550°C on the cross section of YSZ new features, namely pyramidal structures are discovered. These structures grow with time, increase in numbers, appear as singularities, are often arranged in strings, and ...
Doris Sebold   +2 more
wiley   +1 more source

Three‐dimensional Antimony Sulfide Based Flat Optics

open access: yesAdvanced Functional Materials, EarlyView.
This work presents the development of a grayscale electron beam lithography (g‐EBL) method for fabricating antimony trisulfide (Sb2S3) nanostructures with customizable 3D profiles. The refractive index of g‐EBL patterned Sb2S3 is determined based on the synergy of genetic algorithm and transfer matrix method.
Wei Wang   +18 more
wiley   +1 more source

Multiresolution Image Decomposition With Complex Steerable Pyramids

open access: yes, 1996
Publication in the conference proceedings of EUSIPCO, Trieste, Italy ...
Jacovitti, G., Manca, A., Neri, A.
openaire   +1 more source

Small k-pyramids and the complexity of determining k

open access: yesJournal of Discrete Algorithms, 2015
zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Boris Schauerte, Carol T. Zamfirescu
openaire   +2 more sources

Tuning the Electronic Structure and Spin State of Fe─N─C Catalysts Using an Axial Oxygen Ligand and Fe Clusters for High‐Efficiency Rechargeable Zinc–Air Batteries

open access: yesAdvanced Functional Materials, EarlyView.
A FeN4─O/Clu@NC‐0.1Ac catalyst containing atomically‐dispersed FeN4─O sites (medium‐spin Fe2+) and Fe clusters delivered a half‐wave potential of 0.89 V for ORR and an overpotential of 330 mV at 10 mA cm−2 for OER in 0.1 m KOH. When the catalyst was used in a rechargeable Zn–air battery, a power density of 284.5 mW cm−2 was achieved with excellent ...
Yongfang Zhou   +8 more
wiley   +1 more source

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