Results 71 to 80 of about 1,054,395 (366)
On the nonexistence of a vacuum black lens
Journal of High Energy Physics, 2021 We demonstrate that five-dimensional, asymptotically flat, stationary and bi-axisymmetric, vacuum black holes with lens space L(n, 1) topology, possessing the simplest rod structure, do not exist.
James Lucietti, Fred Tomlinson
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Maxwell Chern Simons Theory in a Geometric Representation
, 2000 We quantize the Maxwell Chern Simons theory in a geometric representation that generalizes the Abelian Loop Representation of Maxwell theory. We find that in the physical sector, the model can be seen as the theory of a massles scalar field with a ...
A. Ashtekar +24 more
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Somatic mutational landscape in von Hippel–Lindau familial hemangioblastoma
Molecular Oncology, EarlyView.The causes of central nervous system (CNS) hemangioblastoma in Von Hippel–Lindau (vHL) disease are unclear. We used Whole Exome Sequencing (WES) on familial hemangioblastoma to investigate events that underlie tumor development. Our findings suggest that VHL loss creates a permissive environment for tumor formation, while additional alterations ...
Maja Dembic +5 more
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A growing bacterial colony in two dimensions as an active nematic
Nature Communications, 2018 Rod-shaped bacteria are an example of active matter. Here the authors find that a growing bacterial colony harbours internal cellular flows affecting orientational ordering in its interior and at the boundary.
D. Dell’Arciprete +7 more
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Noncommutative fields in three dimensions and mass generation
, 2007 We apply the noncommutative fields method for gauge theory in three dimensions where the Chern-Simons term is generated in the three-dimensional electrodynamics.
A. Yu Petrov +6 more
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FEBS Open Bio, EarlyView.Enzymes of the 2‐hydroxyacyl‐CoA lyase group catalyze the condensation of formyl‐CoA with aldehydes or ketones. Thus, by structural adaptation of active sites, practically any pharmaceutically and industrially important 2‐hydroxyacid could be biotechnologically synthesized. Combining crystal structure analysis, active site mutations and kinetic assays,
Michael Zahn +4 more
wiley +1 more source
Leadership and Behavior in Humanitarian and Development Transnational Non-Governmental Organizations
Politics and Governance, 2016 Does leadership matter in the governance of civil society organizations? In particular, do the CEOs of humanitarian and development NGOs exhibit different leadership styles and perceive their work environments in different ways as the literature suggests.
Margaret G. Hermann, Christiane Pagé
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Deformations of Maxwell Superalgebras and Their Applications
, 2010 We describe the Lie algebra deformations of D=4 Maxwell superalgebra that was recently introduced as the symmetry algebra of a kappa-symmetric massless superparticle in a supersymmetric constant electromagnetic background.
Gilmore R. +4 more
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Real‐World Performance of CSF Kappa Free Light Chains in the 2024 McDonald Criteria
Annals of Clinical and Translational Neurology, EarlyView.ABSTRACT Objective Kappa free light chains (KFLCs) in the cerebrospinal fluid (CSF) have a similar performance to CSF‐restricted oligoclonal bands (OCB) for multiple sclerosis (MS) diagnosis. To help with implementation, we set out to resolve several remaining uncertainties: (1) performance in a real‐world cohort and the 2024 McDonald criteria; (2 ...
Maya M. Leibowitz +11 more
wiley +1 more source
Revista Eureka sobre Enseñanza y Divulgación de las Ciencias, 2004 La metodología científica incluye aspectos como la capacidad de invención de hipótesis y modelos, la creatividad y el uso del razonamiento analógico, entre otros muchos más.
José Antonio Acevedo-Díaz
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