Results 61 to 70 of about 7,472,306 (302)

Area-Preserving Algebra Structure of Two-Dimensional Supergravity [PDF]

open access: yes, 1995
The effective action for 2d-gravity in Weyl-invariant regularization is extended to supersymmetric case. The super area-preserving invariance and cocyclic properties under general supergravitational transformations of the last action is shown.Comment ...
Karakhanyan, D. R.
core   +3 more sources

Pulmonary Dysfunction Is Associated With Sleep Study Abnormalities in Children With Sickle Cell Disease: A Multicenter Study

open access: yesPediatric Blood &Cancer, EarlyView.
ABSTRACT Introduction Pulmonary dysfunction and sleep abnormalities are common in children with sickle cell disease (SCD) and are associated with worse clinical outcomes. Whether spirometry abnormalities are associated with polysomnography (PSG) findings remains unclear.
Ammar Saadoon Alishlash   +4 more
wiley   +1 more source

Comparison of LiDAR-based Models for True Leaf Area Index and Effective Leaf Area Index Estimation in Young Beech Forests

open access: yesActa Universitatis Agriculturae et Silviculturae Mendelianae Brunensis, 2020
The leaf area index (LAI) is one of the most common leaf area and canopy structure quantifiers. Direct LAI measurement and determination of canopy characteristics in larger areas is unrealistic due to the large number of measurements required to create ...
Zdeněk Patočka   +5 more
doaj   +1 more source

Antenna Performance Analysis for Decameter Solar Radio Observations

open access: yes, 2011
Decameter wavelength radio emission is finely structured in solar bursts. For their research it is very important to use a sufficient sensitivity of antenna systems.
Abranin   +15 more
core   +1 more source

Financial Burden Associated With Hospitalisation Among Families of Childhood Brain Tumours in Australia

open access: yesPediatric Blood &Cancer, EarlyView.
ABSTRACT Background Families of children with cancer experience significant financial strain, even with universal healthcare. Indirect costs, such as productivity losses and non‐medical expenses, are rarely included in economic evaluations, and little is known about how effectively financial aid programmes alleviate this burden. Childhood brain tumours
Megumi Lim   +8 more
wiley   +1 more source

What is the hydrologically effective area of a catchment?

open access: yesEnvironmental Research Letters, 2020
Topographically delineated catchments are the common spatial unit to connect human activities and climate change with their consequences for water availability as a prerequisite for sustainable water management.
Yan Liu   +3 more
doaj   +1 more source

Three-dimensional transthoracic echocardiographic evaluation of tricuspid regurgitation severity using proximal isovelocity surface area: comparison with volumetric method

open access: yesCardiovascular Ultrasound, 2020
Background The quantification of tricuspid regurgitation(TR) using three-dimensional(3D) proximal isovelocity surface area (PISA) derived effective regurgitant orifice area (EROA) is feasible in functional TR.
Beiqi Chen   +8 more
doaj   +1 more source

Assessing protected area effectiveness [PDF]

open access: yesOryx, 2021
Marc Hockings   +4 more
openaire   +1 more source

Effective area of an antenna

open access: yesElectronics Letters, 1976
We find the area of an isotropic linearly polarised antenna by statistical thermodynamics. A quantum-mechanical interpretation is given. For a matched antenna operating at reception, the number of photons captured in an electromagnetic wave is divided into two equal parts: one part is furnished to the load and the other part is reradiated. We prove, by
G. Dubost, J. Dupuy
openaire   +1 more source

Optimizations of Pt/SiC and W/Si multilayers for the Nuclear Spectroscopic Telescope Array [PDF]

open access: yes, 2009
The Nuclear Spectroscopic Telescope Array, NuSTAR, is a NASA funded Small Explorer Mission, SMEX, scheduled for launch in mid 2011. The spacecraft will fly two co-aligned conical approximation Wolter-I optics with a focal length of 10 meters. The mirrors
  +9 more
core   +1 more source

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