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Physical Sciences and Mathematics Commons™

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University of North Dakota

Series

2014

Articles 1 - 2 of 2

Full-Text Articles in Physical Sciences and Mathematics

The Brightest Cluster Galaxy In Abell 85: The Largest Core Known So Far, O. López-Cruz, C. Añorve, M. Birkinshaw, D. M. Worrall, H. J. Ibarra-Medel, Wayne A. Barkhouse, J. P. Torres-Papaqui, V. Motta Oct 2014

The Brightest Cluster Galaxy In Abell 85: The Largest Core Known So Far, O. López-Cruz, C. Añorve, M. Birkinshaw, D. M. Worrall, H. J. Ibarra-Medel, Wayne A. Barkhouse, J. P. Torres-Papaqui, V. Motta

Physics Faculty Publications

We have found that the brightest cluster galaxy (BCG) in A85, Holm 15A, displays the largest core known so far. Its cusp radius, r γ = 4.57 ± 0.06 kpc (426 ± 006), is more than 18 times larger than the mean for BCGs and 1 kpc larger than A2261-BCG, hitherto the largest-cored BCG. Holm 15A hosts the luminous amorphous radio source 0039-095B and has the optical signature of a LINER. Scaling laws indicate that this core could host a supermassive black hole (SMBH) of mass M • ~ (109-1011) M ☉. We suggest that cores this large represent a …

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A Constrained, Possibilistic Logical Approach For Software System Survivability Evaluation, Yanjun Zuo Jun 2014

A Constrained, Possibilistic Logical Approach For Software System Survivability Evaluation, Yanjun Zuo

Accountancy Faculty Publications

In this paper, we present a logical framework to facilitate users in assessing a software system in terms of the required survivability features. Survivability evaluation is essential in linking foreign software components to an existing system or obtaining software systems from external sources. It is important to make sure that any foreign components/systems will not compromise the current system’s survivability properties. Given the increasing large scope and complexity of modern software systems, there is a need for an evaluation framework to accommodate uncertain, vague, or even ill-known knowledge for a robust evaluation based on multi-dimensional criteria. Our framework incorporates user-defined …

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