Results 41 to 50 of about 200,307 (156)

A remarkable recurrent nova in M 31: The predicted 2014 outburst in X-rays with Swift [PDF]

, 2015
The M 31 nova M31N 2008-12a was recently found to be a recurrent nova (RN) with a recurrence time of about 1 year. This is by far the fastest recurrence time scale of any known RNe. Our optical monitoring programme detected the predicted 2014 outburst of
Bode, M. F., Darnley, M. J., Hachisu, I., Henze, M., Hernanz, M., Kato, M., Ness, J. -U., Sala, G., Shafter, A. W., Williams, S. C.   +9 more
core   +4 more sources

An Anthropic Argument against the Future Existence of Superintelligent Artificial Intelligence [PDF]

arXiv, 2017
This paper uses anthropic reasoning to argue for a reduced likelihood that superintelligent AI will come into existence in the future. To make this argument, a new principle is introduced: the Super-Strong Self-Sampling Assumption (SSSSA), building on the Self-Sampling Assumption (SSA) and the Strong Self-Sampling Assumption (SSSA).
arxiv  

Leaf Micromorphology Aids Taxonomic Delineation within the Hypervariable Genus Metrosideros (Myrtaceae) on O\u27ahu

, 2018
Variation in leaf micromorphology can aid delimitation of taxonomically difficult groups. The woody genus Metrosideros (Myrtaceae) dominates Hawai\u27i\u27s native forests and comprises striking, predominantly infraspecific, macromorphological variation,
Keating, Richard, Stacy, Elizabeth, Sur, Gary L.   +2 more
core   +1 more source

A Luminous Be+White Dwarf Supersoft Source in the Wing of the SMC: MAXI J0158-744 [PDF]

, 2012
We present a multi-wavelength analysis of the very fast X-ray transient MAXI J0158-744, which was detected by MAXI/GSC on 2011 November 11. The subsequent exponential decline of the X-ray flux was followed with Swift observations, all of which revealed ...
A. Rajoelimanana, A. Udalski, Albert K. H. Kong, Arnaud, Bufano, Capalbi, Di Stefano, Di Stefano, Di Stefano, Di Stefano, E. S. Bartlett, Galache, Gordon, Hachisu, Hachisu, Hodges-Kluck, Juett, K. L. Li, Kennea, Kimura, Kong, Kong, Kuntz, Lennon, Li, Liu, Lockley, M. J. Coe, Madura, Mukai, Mukai, N. Masetti, Neiner, Nelson, Nishiyama, Nomoto, Orlandini, Osborne, P. A. Charles, Panagia, Rauch, Rinehart, Sault, Sault, Schaefer, Skrutskie, Soria, Swartz, Thomas Franzen, Ting-Ni Lu, Udalski, V. McBride, van den Heuvel, Werner   +53 more
core   +2 more sources

On a Vectorized Version of a Generalized Richardson Extrapolation Process [PDF]

Numerical Algorithms, 74:937--949, 2017, 2016
Let $\{\xx_m\}$ be a vector sequence that satisfies $$ \xx_m\sim \sss+\sum^\infty_{i=1}\alpha_i \gg_i(m)\quad\text{as $m\to\infty$},$$ $\sss$ being the limit or antilimit of $\{\xx_m\}$ and $\{\gg_i(m)\}^\infty_{i=1}$ being an asymptotic scale as $m\to\infty$, in the sense that $$\lim_{m\to\infty}\frac{\|\gg_{i+1}(m)\|}{\|\gg_{i}(m)\|}=0,\quad i=1,2 ...
arxiv  

SSSDET: Simple Short and Shallow Network for Resource Efficient Vehicle Detection in Aerial Scenes [PDF]

, 2019
Detection of small-sized targets is of paramount importance in many aerial vision-based applications. The commonly deployed low cost unmanned aerial vehicles (UAVs) for aerial scene analysis are highly resource constrained in nature. In this paper we propose a simple short and shallow network (SSSDet) to robustly detect and classify small-sized ...
arxiv   +1 more source

Assessing the accuracy of δ^{18<\sup>O_{sw estimates from corals: lessons from simple Monte Carlo simulations}} [PDF]

, 2008
EGU2008-A-04391 Paired measurements of δ18O and Sr/Ca in coral aragonite are routinely used for deriving estimates of δ18Osw and, by extension, sea surface salinity variations over the past centuries. However, in practice, the accuracy (or the error) of
Cahyarini, S. Y., Dullo, Wolf-Christian, Hetzinger, Steffen, Pfeiffer, Miriam, Timm, O., Zinke, Jens   +5 more
core  

Polar Coded Faster-than-Nyquist (FTN) Signaling with Symbol-by-Symbol Detection [PDF]

arXiv, 2020
Reduced complexity faster-than-Nyquist (FTN) signaling systems are gaining increased attention as they provide improved bandwidth utilization for an acceptable level of detection complexity. In order to have a better understanding of the tradeoff between performance and complexity of the reduced complexity FTN detection techniques, it is necessary to ...
arxiv  

Cool Versus Ultracool White Dwarfs [PDF]

, 2005
A preliminary $BVRIJHK$ analysis of the white dwarfs SSSPM J2231$-$7514 and SSSPM J2231$-$7515 is presented. Although both stars were reported to have $T_{\rm eff}<4000$ K, the analysis here indicates $T_{\rm eff}\approx4250$ K for both SSSPM J2231$-$7514 and SSSPM J2231$-$7515.
arxiv   +1 more source

Impact of Satellite Sea Surface Salinity Observations on ENSO Predictions from the NASA/GMAO Seasonal Forecast System [PDF]

We assess the impact of satellite sea surface salinity (SSS) observations on dynamical ENSO forecasts. Assimilation of SSS improves the mixed layer depth (MLD) and modulates the Kelvin waves associated with ENSO.
Borovikov, A., Chang, Y., Hackert, E., Kovach, R., Marshak, J., Molod, A.   +5 more
core   +1 more source