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Institution

University of Alabama

EducationTuscaloosa, Alabama, United States
About: University of Alabama is a education organization based out in Tuscaloosa, Alabama, United States. It is known for research contribution in the topics: Population & Poison control. The organization has 27323 authors who have published 48609 publications receiving 1565337 citations. The organization is also known as: Alabama & Bama.


Papers
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Journal ArticleDOI
Rasha Abbasi1, Y. Abdou2, T. Abu-Zayyad3, Markus Ackermann  +266 moreInstitutions (41)
18 Apr 2012-Nature
TL;DR: An upper limit on the flux of energetic neutrinos associated with GRBs that is at least a factor of 3.7 below the predictions is reported, implying either that GRBs are not the only sources of cosmic rays with energies exceeding 1018 electronvolts or that the efficiency of neutrino production is much lower than has been predicted.
Abstract: Very energetic astrophysical events are required to accelerate cosmic rays to above 10(18) electronvolts. GRBs (c-ray bursts) have been proposed as possible candidate sources(1-3). In the GRB 'fireball' model, cosmic-ray acceleration should be accompanied by neutrinos produced in the decay of charged pions created in interactions between the high-energy cosmic-ray protons and gamma-rays(4). Previous searches for such neutrinos found none, but the constraints were weak because the sensitivity was at best approximately equal to the predicted flux(5-7). Here we report an upper limit on the flux of energetic neutrinos associated with GRBs that is at least a factor of 3.7 below the predictions(4,8-10). This implies either that GRBs are not the only sources of cosmic rays with energies exceeding 10(18) electronvolts or that the efficiency of neutrino production is much lower than has been predicted.

342 citations

Journal ArticleDOI
TL;DR: In this article, a sample consisting of 1,668 small-to-medium sized enterprises (SMEs) in nine countries across 13 different industries was used to provide a finer-grained analysis of the EO-performance relationship.
Abstract: Previous studies have generally established a positive relationship between aggregated measures of entrepreneurial orientation (EO) and firm performance. However, there are theoretical reasons suggesting that three dimensions of EO (innovativeness, proactiveness, and risk-taking) may possess differential relationships with performance in smaller firms. This study utilizes a sample consisting of 1,668 small-to-medium sized enterprises (SMEs) in nine countries across 13 different industries to provide a finer-grained analysis of the EO-performance relationship. Specifically, we theorize and test a non-monotonic influence of innovativeness, proactiveness, and risk-taking on SME performance. Innovativeness and proactiveness displayed predominantly positive U-shaped relationships with SME performance. Risk-taking, however, displayed a predominantly negative U-shaped relationship with SME performance. Further, individualism was found to positively moderate the relationships between innovativeness-performance and proactiveness-performance. Taken together, these results suggest that differential relationships exist between three dimensions of EO and SME performance, with important theoretical implications for future EO research.

341 citations

Journal ArticleDOI
TL;DR: Recommendations encompassing specific hematologic, renal, pulmonary, and endocrine complications of acute liver failure patients are provided, including their management during and after orthotopic liver transplantation.
Abstract: Objective:To provide a uniform platform from which to study acute liver failure, the U.S. Acute Liver Failure Study Group has sought to standardize the management of patients with acute liver failure within participating centers.Methods:In areas where consensus could not be reached because of diverg

340 citations

Journal ArticleDOI
TL;DR: In this paper, the authors investigated the relation between audit firm tenure and clients' financial restatements by assessing restatement-based reporting failures using dimensions of auditor expertise and independence previously assumed to underlie short and long audit tenure problems.

340 citations

Journal ArticleDOI
TL;DR: The Interstellar Boundary Explorer (IBEX) is a small explorer mission that launched on 19 October 2008 with the sole, focused science objective to discover the global interaction between the solar wind and the interstellar medium.
Abstract: The Interstellar Boundary Explorer (IBEX) is a small explorer mission that launched on 19 October 2008 with the sole, focused science objective to discover the global interaction between the solar wind and the interstellar medium. IBEX is designed to achieve this objective by answering four fundamental science questions: (1) What is the global strength and structure of the termination shock, (2) How are energetic protons accelerated at the termination shock, (3) What are the global properties of the solar wind flow beyond the termination shock and in the heliotail, and (4) How does the interstellar flow interact with the heliosphere beyond the heliopause? The answers to these questions rely on energy-resolved images of energetic neutral atoms (ENAs), which originate beyond the termination shock, in the inner heliosheath. To make these exploratory ENA observations IBEX carries two ultra-high sensitivity ENA cameras on a simple spinning spacecraft. IBEX’s very high apogee Earth orbit was achieved using a new and significantly enhanced method for launching small satellites; this orbit allows viewing of the outer heliosphere from beyond the Earth’s relatively bright magnetospheric ENA emissions. The combination of full-sky imaging and energy spectral measurements of ENAs over the range from ∼10 eV to 6 keV provides the critical information to allow us to achieve our science objective and understand this global interaction for the first time. The IBEX mission was developed to provide the first global views of the Sun’s interstellar boundaries, unveiling the physics of the heliosphere’s interstellar interaction, providing a deeper understanding of the heliosphere and thereby astrospheres throughout the galaxy, and creating the opportunity to make even greater unanticipated discoveries.

340 citations


Authors

Showing all 27508 results

NameH-indexPapersCitations
Jasvinder A. Singh1762382223370
Hongfang Liu1662356156290
Ian J. Deary1661795114161
Yongsun Kim1562588145619
Dong-Chul Son138137098686
Simon C. Watkins13595068358
Kenichi Hatakeyama1341731102438
Conor Henderson133138788725
Peter R Hobson133159094257
Tulika Bose132128588895
Helen F Heath132118589466
James Rohlf131121589436
Panos A Razis130128790704
David B. Allison12983669697
Eduardo Marbán12957949586
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Performance
Metrics
No. of papers from the Institution in previous years
YearPapers
202372
2022357
20212,703
20202,759
20192,602
20182,411