Results 31 to 40 of about 1,253,527 (227)

A K-Theoretic Proof of Boutet de Monvel's Index Theorem for Boundary Value Problems [PDF]

open access: yes, 2005
We study the C*-closure A of the algebra of all operators of order and class zero in Boutet de Monvel's calculus on a compact connected manifold X with non-empty boundary.
Atiyah M. F.   +5 more
core   +4 more sources

Compliant Metamaterials for Resonantly Enhanced Infrared Absorption Spectroscopy and Refractive Index Sensing [PDF]

open access: yes, 2011
Metamaterials can be designed to operate at frequencies from the visible to the mid-IR, making these structures useful for both refractive index sensing and surface-enhanced infrared absorption spectroscopy.
Atwater, Harry A.   +3 more
core   +1 more source

Management of nitrogen fertilization on agronomic and nutritional characteristics in second crop corn

open access: yesBioscience Journal, 2020
Fertilization management, mainly nitrogen, is one of the factors that most directly affect corn grain yield. Nitrogen dynamics in the soil is quite complex and its main source currently used in corn production, the urea, undergo intense losses in its ...
Daiane de Souza Bueno   +3 more
doaj   +3 more sources

Efficacy of split night CPAP titration in moderate and severe obstructive sleep apnea syndrome patients

open access: yesEgyptian Journal of Chest Disease and Tuberculosis, 2016
Background: Split-night polysomnography was introduced to obtain diagnosis and determine an effective CPAP on a single night that would be convenient and cost effective.
Shereen Farghaly, Lamiaa H. Shaaban
doaj   +1 more source

All-Dielectric Metasurface Based on Complementary Split-Ring Resonators for Refractive Index Sensing

open access: yesPhotonics, 2022
Thanks to their lower losses and sharper resonances compared to their metallic counterparts, all-dielectric metasurfaces are attracting a quickly growing research interest.
Mohsen Samadi   +8 more
doaj   +1 more source

Chiral metamaterials with negative refractive index based on four "U" split ring resonators [PDF]

open access: yes, 2010
A uniaxial chiral metamaterial is constructed by double-layered four "U" split ring resonators mutually twisted by 90 degrees. It shows a giant optical activity and circular dichroism.
C. M. Soukoulis   +10 more
core   +2 more sources

Variable Selection Bias in Classification Trees Based on Imprecise Probabilities [PDF]

open access: yes, 2005
Classification trees based on imprecise probabilities provide an advancement of classical classification trees. The Gini Index is the default splitting criterion in classical classification trees, while in classification trees based on imprecise ...
Strobl, Carolin
core   +3 more sources

Investigating the effect of salinity and nitrogen stress on the yield and yield components of panicum millet [PDF]

open access: yesفناوری‌های پیشرفته در بهره‌وری آب, 2023
The objective of this study was to investigate the effects of combined stresses of irrigation salinity and nitrogen fertilizer on the yield and yield components of millet plant.
Yazdan Khodarahmi   +3 more
doaj   +1 more source

Experimental retrieval of the negative parameters “Permittivity and Permeability” based on a circular split ring resonator (CSRR) left handed metamaterial

open access: yesJournal of Electrical Systems and Information Technology, 2018
This paper presents a simulation and experimental retrieval negative permittivity and permeability based on a circular split ring resonator left handed material (LHM).
Moataza A. Hindy   +2 more
doaj   +1 more source

Wave Propagation Retrieval Method For Metamaterials: Unambiguous Restoration Of Effective Parameters [PDF]

open access: yes, 2009
In this article we propose a new direct method of effective parameters restoration that is based on the wave propagation phenomenon. It retrieves the effective properties unambiguously, is applicable to thick metamaterial (MTM) slabs and is easy in ...
Andrei Andryieuski   +3 more
core   +2 more sources

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