Results 21 to 30 of about 11,756,332 (389)

New CAST limit on the axion–photon interaction [PDF]

Nature Physics, 2017
Hypothetical low-mass particles, such as axions, provide a compelling explanation for the dark matter in the universe. Such particles are expected to emerge abundantly from the hot interior of stars.
V. S. K. A. H. G. J. M. J. F. S. A. F. J. I. T. M. T. Anastassopoulos Aune Barth Belov Bräuninger Cantat, V. Anastassopoulos, S. Aune, K. Barth, A. Belov, H. Bräuninger, G. Cantatore, J. Carmona, J. Castel, S. Cetin, F. Christensen, J. Collar, T. Dafni, M. Davenport, T. Decker, A. Dermenev, K. Desch, C. Eleftheriadis, G. Fanourakis, E. Ferrer-Ribas, H. Fischer, J. A. Garćıa, A. Gardikiotis, J. G. Garza, E. Gazis, T. Geralis, I. Giomataris, S. Gninenko, C. Hailey, M. Hasinoff, D. Hoffmann, F. Iguaz, I. Irastorza, A. Jakobsen, J. Jacoby, K. Jakovčić, J. Kaminski, M. Karuza, N. Kralj, M. Krčmar, S. Kostoglou, C. Krieger, B. Lakić, J. Laurent, A. Liolios, A. Ljubičić, G. Luzón, M. Maroudas, L. Miceli, S. Neff, I. Ortega, T. Papaevangelou, K. Paraschou, M. Pivovaroff, G. Raffelt, M. Roșu, J. Ruz, E. Chóliz, I. Savvidis, S. Schmidt, Y. Semertzidis, S. Solanki, L. Stewart, T. Vafeiadis, J. Vogel, S. C. Yıldız, K. Zioutas   +66 more
semanticscholar   +1 more source

Limit Cycles and Conformal Invariance [PDF]

, 2012
There is a widely held belief that conformal field theories (CFTs) require zero beta functions. Nevertheless, the work of Jack and Osborn implies that the beta functions are not actually the quantites that decide conformality, but until recently no such ...
A Cappelli, A Zamolodchikov, B Grinstein, H Osborn, I Jack, J Polchinski, J Wess, J-F Fortin, J-F Fortin, J-F Fortin, J-F Fortin, J-F Fortin, JL Cardy, KG Chetyrkin, Z Komargodski, Z Komargodski   +15 more
core   +2 more sources

The improper neutrosophic integrals [PDF]

Neutrosophic Sets and Systems
In light of the expansion of research that dealt with the logic of the neutrosophic and its clear spread at the level of science, it was necessary for us to continue in the series of research that covers the calculus of neutrosophic integration, and this
Yaser Ahmad Alhasan, Issam Mohammed Abdallah Abdalaziz, Raja Abdullah Abdulfatah , Florentin Smarandache   +3 more
doaj   +1 more source

Los límites (¿necesarios?) del expansionismo romano en etapa altoimperial : el sueño de Druso

Espacio, Tiempo y Forma. Serie II, Historia Antigua, 2010
La expansión romana en etapa altoimperial atravesó momentos diversos, unos de impulso, otros de contención de la ya conquistado. Esta dinámica aparece configurada por las propias circunstancias de cada momento y por la determinación (o carencia de ella ...
Eduardo Pitillas Salañer
doaj   +1 more source

Quantum-Enhanced Measurements: Beating the Standard Quantum Limit [PDF]

Science, 2004
Quantum mechanics, through the Heisenberg uncertainty principle, imposes limits on the precision of measurement. Conventional measurement techniques typically fail to reach these limits.
V. Giovannetti, S. Lloyd, L. Maccone
semanticscholar   +1 more source

Chiral limit of QCD [PDF]

, 1994
This talk contains an analysis of quenched chiral perturbation theory and its consequences. The chiral behavior of a number of quantities such as the pion mass $m_\pi^2$, the Bernard-Golterman ratios $R$ and $\chi$, the masses of nucleons, and the kaon B-
Allton, Ashman, Ashman, Bernard, Bernard, Bernard, Booth, Donoghue, Gasser, Gasser, Golterman, Golterman, Gupta, Gupta, Gupta, Gupta, Gupta, Kilcup, Kuramashi, Lepage, Lüscher, Maiaini, Mandula, Manohar, Martinelli, Morel, Rajan Gupta, Sharpe, Sharpe, Sharpe, Sharpe, Sharpe, Ukawa   +32 more
core   +2 more sources

Epistemological obstacles on the concepts of limit and continuity in courses of differential calculus in engineering programs

Revista Perspectivas, 2017
Many investigations have been carried out with the objective of identifying the difficulties that students have in the learning process of the different mathematical concepts.
Cesar Augusto Hernandez-Suarez , Raúl Prada-Núñez , Pastor Ramírez-Leal   +2 more
doaj   +1 more source

DIDACTIC VALUE OF MATHEMATICAL CONCEPT

Наука Красноярья, 2015
In article the didactic value of exact mathematical concept on the example of concepts of the section «Numerical Ranks» reveals. The definition of concept of a row specified in this article, fixes the real defining signs allowing to identify unambi ...
Elena Evgenevna Alekseeva
doaj   +1 more source

A quasitopos containing CONV and MET as full subcategories

International Journal of Mathematics and Mathematical Sciences, 1988
We show that convergence spaces with continuous maps and metric spaces with contractions, can be viewed as entities of the same kind. Both can be characterized by a “limit function” λ which with each filter ℱ associates a map λℱ from the underlying set ...
E. Lowen, R. Lowen
doaj   +1 more source

On teaching fundamentals of calculus at secondary school

Lietuvos Matematikos Rinkinys, 2010
The article, from different didactical aspects, analysis the problem of teaching fundamentals of calculus at secondary school. Continuity and limit of a function are suggested to be explained on the base of an informal concept and examples of these ...
Antanas Apynis
doaj   +1 more source