Results 11 to 20 of about 2,777,716 (292)

Light Trapping Textures Designed by Electromagnetic Optimization for Sub-Wavelength Thick Solar Cells [PDF]

open access: yes, 2013
Light trapping in solar cells allows for increased current and voltage, as well as reduced materials cost. It is known that in geometrical optics, a maximum 4n^2 absorption enhancement factor can be achieved by randomly texturing the surface of the solar
Ganapati, Vidya   +2 more
core   +1 more source

A Uniform Approach to Analogies, Synonyms, Antonyms, and Associations [PDF]

open access: yes, 2008
Recognizing analogies, synonyms, antonyms, and associations appear to be four\ud distinct tasks, requiring distinct NLP algorithms. In the past, the four\ud tasks have been treated independently, using a wide variety of algorithms.\ud These four semantic
Turney, Peter D.
core   +4 more sources

Question-Driven Methods or Method-Driven Questions? How We Limit What We Learn by Limiting What We Ask

open access: yesJournal of MultiDisciplinary Evaluation, 2015
The “methodologically manic-obsessive” evaluation profession and the metrics- and measures-obsessed lay users of evidence have managed to seriously limit the value of what we learn from evaluation.
E. Jane Davidson
doaj   +1 more source

Chiral fermions on the lattice and index relations [PDF]

open access: yes, 2000
Comparing recent lattice results on chiral fermions and old continuum results for the index puzzling questions arise. To clarify this issue we start with a critical reconsideration of the results on finite lattices.
Adams D. H.   +12 more
core   +2 more sources

LEDs driven by AC without transformers or rectifiers

open access: yesScientific Reports, 2021
We explore the driving of LEDs by untransformed AC. An extreme case is driving 1.9 V threshold (red) LEDs with UK mains, peak voltage 325 V. Commonly, driving is by transformed, rectified (DC) supply with a series resistor (where a significant fraction ...
Robin W. Hughes, Mark Warner
doaj   +1 more source

The moduli space of isometry classes of globally hyperbolic spacetimes [PDF]

open access: yes, 2004
This is the last article in a series of three initiated by the second author. We elaborate on the concepts and theorems constructed in the previous articles. In particular, we prove that the GH and the GGH uniformities previously introduced on the moduli
Ambjørn J   +21 more
core   +3 more sources

Hitting Times and Positions in Rare Events [PDF]

open access: yes, 2020
We establish abstract limit theorems which provide sufficient conditions for a sequence $(A_{l})$ of rare events in an ergodic probability preserving dynamical system to exhibit Poisson asymptotics, and for the consecutive positions inside the $A_{l}$ to
Zweimüller, Roland
core   +3 more sources

Studying The Effects Of Transcranial Direct Current Stimulation In Stroke Recovery Using Magnetic Resonance Imaging

open access: yesFrontiers in Human Neuroscience, 2013
Transcranial direct current stimulation (tDCS) is showing increasing promise as an adjunct therapy in stroke rehabilitation. However questions still remain concerning its mechanisms of action, which currently limit its potential. Magnetic Resonance (MR)
Charlotte J Stagg, Heidi eJohansen-Berg
doaj   +1 more source

$\mu$-Limit Sets of Cellular Automata from a Computational Complexity Perspective [PDF]

open access: yes, 2015
This paper concerns $\mu$-limit sets of cellular automata: sets of configurations made of words whose probability to appear does not vanish with time, starting from an initial $\mu$-random configuration.
Boyer, Laurent   +4 more
core   +5 more sources

On the weak limit of compact operators on the reproducing kernel Hilbert space and related questions

open access: yesAnalele Stiintifice ale Universitatii Ovidius Constanta: Seria Matematica, 2016
By applying the so-called Berezin symbols method we prove a Gohberg- Krein type theorem on the weak limit of compact operators on the non- standard reproducing kernel Hilbert space which essentially improves the similar results of Karaev [5]: We also in ...
Saltan Suna
doaj   +1 more source

Home - About - Disclaimer - Privacy