Results 21 to 30 of about 9,478,616 (387)
Neutron limit on the strongly-coupled chameleon field. [PDF]
Physical review. D., 2016 The physical origin of the dark energy that causes the accelerated expansion rate of the Universe is one of the major open questions of cosmology. One set of theories postulates the existence of a self-interacting scalar field for dark energy coupling to
K. Li +15 more
semanticscholar +1 more source
A Dozen Problems, Questions and Conjectures About Positive Scalar Curvature [PDF]
, 2017 Unlike manifolds with positive sectional and with positive Ricci curvatures which aggregate to modest (roughly) convex islands in the vastness of all Riemannian spaces, the domain \(\{\mathcal{SC}>0\}\) of manifolds with positive scalar curvatures ...
M. Gromov
semanticscholar +1 more source
Continuum Limit of Scalar Masses and Mixing Energies [PDF]
, 1998 We evaluate the continuum limit of the valence approximation to the mass of scalar quarkonium and to the scalar quarkonium-glueball mixing energy for a range of different quark masses.
Amsler +12 more
core +4 more sources
LEDs driven by AC without transformers or rectifiers
Scientific 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 Power of Convex Relaxation: Near-Optimal Matrix Completion [PDF]
IEEE Transactions on Information Theory, 2009 This paper is concerned with the problem of recovering an unknown matrix from a small fraction of its entries. This is known as the matrix completion problem, and comes up in a great number of applications, including the famous Netflix Prize and other ...
E. Candès, T. Tao
semanticscholar +1 more source
صياغة أسئلة البحث للبحوث العلمية في تعليم اللغة العربية
Al-Ta'rib, 2016 Research problem is the first thing to be found by researcher. Then, he should limit it clearly so that it can be easy to be understood. At this step, the researcher needs special formula to write the problems statement in the form of research questions ...
Arief Rahman Hakim
doaj +1 more source
Frontiers 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
Hitting Times and Positions in Rare Events [PDF]
, 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
On the weak limit of compact operators on the reproducing kernel Hilbert space and related questions
Analele 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
Noninvasive prenatal testing: limitations and unanswered questions [PDF]
Genetics in Medicine, 2014 The clinical use of noninvasive prenatal testing to screen high-risk patients for fetal aneuploidy is becoming increasingly common. Initial studies have demonstrated high sensitivity and specificity, and there is hope that these tests will result in a reduction of invasive diagnostic procedures as well as their associated risks.
Monica A, Lutgendorf +3 more
openaire +2 more sources