320 research outputs found
ATLAS100 data release 1
No full textPublic data release accompanying the ATLAS100 sample definition paper by Srivastav et al. (2026). The data release includes the cleaned and binned ATLAS light curves of 1729 transients in the sample. Also included is a catalog csv file with additional useful metadata for the transients in the sample, including host galaxy associations, any updated classifications, etc
John Smartt Coley manuscript, MSS.0342
No full textAbstract: Uncorrected manuscript of Coley's translation of Le Roman de Thebes, published in 1986 as part of the Garland Library of Medieval Literature.Scope and Content Note: The collection contains an uncorrected manuscript of Coley's translation of Le Roman de Thebes, published in 1986 as part of the Garland Library of Medieval Literature.Biographical/Historical Note: Author from Alexander City, Alabama; graduate of the University of Alabama, A.B., 1933 and graduate school, 1933-1935
High frequency propagation in large and multiply connected electromagnetic environments
No full textEmergent wireless telecommunications and 5G mobile networks will operate at very high frequencies, ranging from microwave (5GHz) to mmWave (28GHz and beyond) regimes. Indoor coverage is challenging at these frequencies, where environments are expected to be highly overmoded. We perform full-wave Transmission Line Matrix simulations of a test electromagnetic environment. For electrically large, multiply connected rooms with simple polygonal irregularities, e.g. blades, we show that different regimes occur in the spatial field pattern as the frequency increases. From 1 GHz to 5 GHz the pattern is speckled. At 8 and 12 GHz we observe the emergence of specular components existing on a noisy background. The statistics of fields in the background are important for small scale fading in non-line-of-sight conditions. We characterize the spatial statistics of the test environment. Because of coupling and partially regular boundary, fluctuations acquire non-generic features, and they result in non-Rayleigh distribution functions at the investigated frequencies. The resurgence of directionality in the high microwave regime has an effect in fading statistics in a similar way of shadowing, from which background field statistics are fitted by fat tail (Bessel K) distribution. However, since the transition from low to high microwave regimes has no defined separation between specular and noisy components, generated by reflection and diffraction, ray tracing algorithms - more appropriate to predict energy of specular components - need to be extended to cope with noisy fields. We envisage these methods to be fundamental in the description of mmWave propagation. The achieved results are useful to create channel models for the outdoor-to-indoor transition and to extend mobile signal coverage to indoor regions
Madison Smartt Bell, 36th Annual ODU Literary Festival
No full textMadison Smartt Bell is the author of 13 novels and two collections of short stories, including Barking Man, Save Me, Joe Louis, and Ten Indians. In 2002, his novel Doctor Sleep was adapted as a film, Close Your Eyes. Forty Words For Fear, an album of songs co-written by Bell and Wyn Cooper, was released in 2003. All Souls\u27 Rising was a finalist for the 1995 National Book Award and the 1996 PEN/Faulkner Award and winner of the Anisfield-Wolf award for the best book of 1996 dealing with race. Bell\u27s latest novel, The Color of Night, appeared in 2011
The chemical composition towards the galactic anti-centre .1. Observations and model atmosphere analyses
No full textHigh resolution spectra of six early B-type main-sequence stars having galactocentric distances of between 10 and 18 kpc are presented. We List the equivalent widths for the metal lines and illustrate their hydrogen and helium line profiles. The stars are analysed using LTE line-blanketed model atmosphere techniques to derive atmospheric parameters and surface chemical compositions. All six stars have similar effective temperatures and surface gravities, allowing a reliable comparison of their metal abundances and distances. Significant variations in the photospheric abundances are evident and are discuss the need for a more detailed line-by-line differential analysis to exactly quantify the differences. This will be presented in a companion paper (Smartt et al. 1996)
Probing the Progenitors of Type Ia Supernovae using Circumstellar Material Interaction Signatures
No full textThis work aims to study different probes of Type Ia supernova (SN Ia) progenitors that have been suggested to be linked to the presence of circumstellar material (CSM). In particular, we have investigated, for the first time, the link between narrow blueshifted Na i D absorption profiles and the presence and strength of the broad high-velocity Ca ii near-infrared triplet absorption features seen in SNe Ia around maximum light. With the probes exploring different distances from the SN; Na i D > 1017cm, high-velocity Ca ii features < 1015cm. For this, we have used a new intermediate-resolution X-shooter spectral sample of 15 SNe Ia. We do not identify a link between these two probes, implying either that, one (or both) is not physically related to the presence of CSM or that the occurrence of CSM at the distance explored by one probe is not linked to its presence at the distance probed by the other. However, the previously identified statistical excess in the presence of blueshifted (over redshifted) Na i D absorption is confirmed in this sample at high significance and is found to be stronger in SNe Ia hosted by late-type galaxies. This excess is difficult to explain as being from an interstellar-medium origin as has been suggested by some recent modelling, as such an origin is not expected to show a bias for blueshifted absorption. However, a circumstellar origin for these features also appears unsatisfactory based on our new results, given the lack of link between the two probes of CSM investigated
Can Dabus Now have a German Passport?
No full textThe case commentary looks at the latest ruling in the DABUS-saga, this time from the German Federal Court in Karlsruhe. Since 2017 Dr Stephen Thaler and his attorney Professor Ryan Abbott have tried to prove that patent protection should be available for innovation invented by AI. Together they have filed a long series of world-wide high-profile legal actions, including the UK, US, New Zealand, Australia, Saudi Arabia and South Africa. All with the same aim to have Thaler’s DABUS device listed as the inventor with its own patent. This article follows on from an earlier piece EIPR (2024), with an update from the German Federal Court (Bundesgerichtshof 11 June 2024). DABUS operator and inventor, Dr Stephen L. Thaler, has been trying for years to have AI registered as an inventor worldwide - and has so far failed in almost all cases worldwide except Saudi Arabia and South Africa
A twist in the tale of γ-ray bursts
No full textAn unusually long burst of γ-rays zapped Earth in December 2011, lasting 4 hours. The cause of this burst is now proposed to be a peculiar supernova produced by a spinning magnetic neutron star. See Letter p.18
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