2,925 research outputs found
An uncommon case of relevance through everyday experiences
Physics education research has probed for the relevance of physics in
students' everyday lives. Attitudinal and epistemological surveys have asked
students if they think of or use physics in their daily lives. We have
previously documented how it is uncommon that our life science students
describe using or even seeing physics in their daily life (Nair, 2018). This
result was unsurprising and aligns with previous scholarship of students
majoring in disciplines outside of physics; we have argued that it is
optimistic for scholars to expect students with disciplinary homes outside of
physics to see their experiences through a lens of physics. Methodologically,
we searched for a contrasting case (Sam). Sam is majoring in the life sciences
and articulates moments where she uses physics to reason through everyday
phenomena. We explore the ways in which courses can support students like Sam
to find physics relevant to their everyday experiences.Comment: pre-prin
Response to the consultation ‘Regulating On-line Gambling in the EU: Recent Developments and Current Challenges from the Internal Market Standpoint'
This is a collaborative submission from a group of academics based in the UK with expertise in information technology law and related areas. The preparation of this response has been funded by the Information Technology Think Tank, which is supported by the Arts and Humanities Research Council and led by the SCRIPT/AHRC Centre for Research in Intellectual Property and Technology, University of Edinburgh. This response has been prepared by Abhilash Nair and Dinusha Mendis
Detecting primordial gravitational waves with circular polarization of the redshifted 21 cm line: II. Forecasts
In the first paper of this series, we showed that the CMB quadrupole at high
redshifts results in a small circular polarization of the emitted 21 cm
radiation. In this paper we forecast the sensitivity of future radio
experiments to measure the CMB quadrupole during the era of first cosmic light
(). The tomographic measurement of 21 cm circular polarization allows
us to construct a 3D remote quadrupole field. Measuring the -mode component
of this remote quadrupole field can be used to put bounds on the
tensor-to-scalar ratio . We make Fisher forecasts for a future Fast Fourier
Transform Telescope (FFTT), consisting of an array of dipole antennas in a
compact grid configuration, as a function of array size and observation time.
We find that a FFTT with a side length of 100 km can achieve after ten years of observation and with a sky coverage
. The forecasts are dependent on the evolution of the
Lyman- flux in the pre-reionization era, that remains observationally
unconstrained. Finally, we calculate the typical order of magnitudes for
circular polarization foregrounds and comment on their mitigation strategies.
We conclude that detection of primordial gravitational waves with 21 cm
observations is in principle possible, so long as the primordial magnetic field
amplitude is small, but would require a very futuristic experiment with
corresponding advances in calibration and foreground suppression techniques.Comment: 19 pages, matches PRD accepted versio
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