Results 11 to 20 of about 5,767,941 (347)
Mapping receptive fields in primary visual cortex
Nearly 40 years ago, in the pages of this journal, Hubel and Wiesel provided the first description of receptive fields in the primary visual cortex of higher mammals. They defined two classes of cortical cells, ‘simple’ and ‘complex’, based on neural responses to simple visual stimuli.
Dario L. Ringach
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Primary fields in celestial CFT [PDF]
Abstract The basic ingredient of CCFT holography is to regard four-dimensional amplitudes describing conformal wave packets as two-dimensional conformal correlation functions of the operators associated to external particles. By construction, these operators transform as quasi-primary fields under SL(2, ℂ) conformal symmetry group ...
Angelos Fotopoulos+2 more
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Cholera outbreak in some communities in North-East Nigeria, 2019: an unmatched case–control study
Background Cholera, a diarrheal disease caused by the bacterium Vibrio cholerae, transmitted through fecal contamination of water or food remains an ever-present risk in many countries, especially where water supply, sanitation, food safety, and hygiene ...
Idowu O. Fagbamila+10 more
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Primary field experiences: Critical for primary generalist physical education teachers? [PDF]
Generalist primary teachers teach physical education in many countries, and their preparation has been the subject of attention internationally. While they undertake field experiences as part of their preparation to teach, it is unclear how much of their teaching is focused on physical education.
Frances Murphy+2 more
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Primary singularities of vector fields on surfaces [PDF]
Unless another thing is stated one works in the $C^\infty$ category and manifolds have empty boundary. Let $X$ and $Y$ be vector fields on a manifold $M$. We say that $Y$ tracks $X$ if $[Y,X]=fX$ for some continuous function $f\colon M\rightarrow\mathbb R$.
Hirsch, MW, Turiel, FJ
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Chickenpox is a common childhood disease caused by varicella-zoster virus (VZV). VZV vaccination is not part of the UK childhood immunisation programme, but its potential inclusion is regularly assessed.
Megan Bardsley+10 more
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Background Currently, over two million persons are internally displaced because of the complex humanitarian emergency in Nigeria’s northeast region. Due to crowded and unsanitary living conditions, the risk of communicable disease transmission, morbidity,
Saheed Gidado+17 more
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Citizen scientists track a charismatic carnivore: Mapping the spread and impact of the South African Mantis (Miomantidae, Miomantis caffra) in Australia [PDF]
The recent integration of citizen science with modern technology has greatly increased its applications and has allowed more people than ever to contribute to research across all areas of science.
Matthew G. Connors+28 more
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Background Malaria is a leading cause of morbidity and mortality among forcibly displaced populations, including refugees, approximately two-thirds of whom reside in malaria endemic regions.
Kudzai Patience Takarinda+6 more
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$sl(2,\mathds{C})\times D$ symmetry and conformal primary basis for massless fields [PDF]
Alternative to the embedding formalism, we provide a group theoretic approach to the conformal primary basis for the massless field with arbitrary helicity. To this end, we first point out that $sl(2,\mathds{C})$ isometry gets enhanced to $sl(2,\mathds{C})\times D$ symmetry for the solution space of the massless field with arbitrary helicity.
arxiv +1 more source