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1. Double Your Corners, Double Your Fun: The Doorway Camera

   https://doi.org/10.1109/ICCP54855.2022.9887738  

   Krska, William; Seidel, Sheila W.; Saunders, Charles; Czajkowski, Robinson; Yu, Christopher; Murray-Bruce, John; Goyal, Vivek (August 2022, IEEE International Conference on Computational Imaging (ICCP))

   In a built environment, wanting to see without direct line of sight is often due to being outside a doorway. The two vertical edges of the doorway provide occlusions that can be exploited for non-line-of-sight imaging by forming corner cameras. While each corner camera can separately yield a robust 1D reconstruction, joint processing suggests novelties in both forward modeling and inversion. The resulting doorway camera provides accurate and robust 2D reconstructions of the hidden scene. This work provides a novel inversion algorithm to jointly estimate two views of change in the hidden scene, using the temporal difference between photographs acquired on the visible side of the doorway. Successful reconstruction is demonstrated in a variety of real and rendered scenarios, including different hidden scenes and lighting conditions. A Cramer-Rao bound analysis is used to demonstrate the 2D resolving power of the doorway camera over other passive acquisition strategies and to motivate the novel biangular reconstruction grid. 

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2. The double adaptivity paradigm

   https://doi.org/10.1016/j.camwa.2020.10.002  

   Demkowicz, Leszek; Führer, Thomas; Heuer, Norbert; Tian, Xiaochuan (August 2021, Computers & Mathematics with Applications)
3. The Double Chooz antineutrino detectors

   https://doi.org/10.1140/epjc/s10052-022-10726-x  

   de Kerret, H.; Abe, Y.; Aberle, C.; Abrahão, T.; Ahijado, J. M.; Akiri, T.; Alarcón, J. M.; Alba, J.; Almazan, H.; dos Anjos, J. C.; et al (September 2022, The European Physical Journal C)

   Abstract This article describes the setup and performance of the near and far detectors in the Double Chooz experiment. The electron antineutrinos of the Chooz nuclear power plant were measured in two identically designed detectors with different average baselines of about 400 m and 1050 m from the two reactor cores. Over many years of data taking the neutrino signals were extracted from interactions in the detectors with the goal of measuring a fundamental parameter in the context of neutrino oscillation, the mixing angle $$\theta _{13}$$ θ 13 . The central part of the Double Chooz detectors was a main detector comprising four cylindrical volumes filled with organic liquids. From the inside towards the outside there were volumes containing gadolinium-loaded scintillator, gadolinium-free scintillator, a buffer oil and, optically separated, another liquid scintillator acting as veto system. Above this main detector an additional outer veto system using plastic scintillator strips was installed. The technologies developed in Double Chooz were inspiration for several other antineutrino detectors in the field. The detector design allowed implementation of efficient background rejection techniques including use of pulse shape information provided by the data acquisition system. The Double Chooz detectors featured remarkable stability, in particular for the detected photons, as well as high radiopurity of the detector components. 

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4. Unraveling the hysteretic behavior at double cations-double halides perovskite - electrode interfaces

   https://doi.org/10.1016/j.nanoen.2021.106428  

   Kim, Dohyung; Liu, Yongtao; Ievlev, Anton V.; Higgins, Kate; Ovchinnikova, Olga S.; Yun, Jae Sung; Seidel, Jan; Kalinin, Sergei V.; Ahmadi, Mahshid (November 2021, Nano Energy)
5. On the fate of the secondary white dwarf in double-degenerate double-detonation Type Ia supernovae

   https://doi.org/10.1093/mnras/stac3107  

   Pakmor, R.; Callan, F. P.; Collins, C. E.; de Mink, S. E.; Holas, A.; Kerzendorf, W. E.; Kromer, M.; Neunteufel, P. G.; O’Brien, John T.; Röpke, F. K.; et al (November 2022, Monthly Notices of the Royal Astronomical Society)

   ABSTRACT The progenitor systems and explosion mechanism of Type Ia supernovae are still unknown. Currently favoured progenitors include double-degenerate systems consisting of two carbon-oxygen white dwarfs with thin helium shells. In the double-detonation scenario, violent accretion leads to a helium detonation on the more massive primary white dwarf that turns into a carbon detonation in its core and explodes it. We investigate the fate of the secondary white dwarf, focusing on changes of the ejecta and observables of the explosion if the secondary explodes as well rather than survives. We simulate a binary system of a $$1.05\, \mathrm{M_\odot }$$ and a $$0.7\, \mathrm{M_\odot }$$ carbon-oxygen white dwarf with $$0.03\, \mathrm{M_\odot }$$ helium shells each. We follow the system self-consistently from inspiral to ignition, through the explosion, to synthetic observables. We confirm that the primary white dwarf explodes self-consistently. The helium detonation around the secondary white dwarf, however, fails to ignite a carbon detonation. We restart the simulation igniting the carbon detonation in the secondary white dwarf by hand and compare the ejecta and observables of both explosions. We find that the outer ejecta at $$v~\gt ~15\, 000$$ km s−1 are indistinguishable. Light curves and spectra are very similar until $$\sim ~40 \ \mathrm{d}$$ after explosion and the ejecta are much more spherical than violent merger models. The inner ejecta differ significantly slowing down the decline rate of the bolometric light curve after maximum of the model with a secondary explosion by ∼20 per cent. We expect future synthetic 3D nebular spectra to confirm or rule out either model. 

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