28,962 research outputs found
Web-based Gene Pathogenicity Analysis (WGPA): a web platform to interpret gene pathogenicity from personal genome data
UNLABELLED: As the volume of patient-specific genome sequences increases the focus of biomedical research is switching from the detection of disease-mutations to their interpretation. To this end a number of techniques have been developed that use mutation data collected within a population to predict whether individual genes are likely to be disease-causing or not. As both sequence data and associated analysis tools proliferate, it becomes increasingly difficult for the community to make sense of these data and their implications. Moreover, no single analysis tool is likely to capture all relevant genomic features that contribute to the gene's pathogenicity. Here, we introduce Web-based Gene Pathogenicity Analysis (WGPA), a web-based tool to analyze genes impacted by mutations and rank them through the integration of existing prioritization tools, which assess different aspects of gene pathogenicity using population-level sequence data. Additionally, to explore the polygenic contribution of mutations to disease, WGPA implements gene set enrichment analysis to prioritize disease-causing genes and gene interaction networks, therefore providing a comprehensive annotation of personal genomes data in disease. AVAILABILITY AND IMPLEMENTATION: wgpa.systems-genetics.net
History state formalism for Dirac's theory
We propose a history state formalism for a Dirac particle. By introducing a
reference quantum clock system it is first shown that Dirac's equation can be
derived by enforcing a timeless Wheeler-DeWitt-like equation for a global
state. The Hilbert space of the whole system constitutes a unitary
representation of the Lorentz group with respect to a properly defined
invariant product, and the proper normalization of global states directly
ensures standard Dirac's norm. Moreover, by introducing a second quantum clock,
the previous invariant product emerges naturally from a generalized continuity
equation. The invariant parameter associated with this second clock
labels history states for different particles, yielding an observable evolution
in the case of an hypothetical superposition of different masses. Analytical
expressions for both space-time density and electron-time entanglement are
provided for two particular families of electron's states, the former including
Pryce localized particles.Comment: 9 pages, 2 figures, final versio
Book Review: Waiting for Jose: The Minutemen’s Pursuit of America
Book Review: Waiting for Jose: The Minutemen’s Pursuit of America Harel Shapira 2013 Princeton, NJ: Princeton University Press 152 pages Hardcover: $25.16 ISBN: 978-0-691-15215-
Max Hjortsberg
He lives in Livingston, Montana and works with the environmental counsel. He was born and raised in Paradise Valley, Montana. His parents came to visit a friend in the late 1960s and they fell in love with the place. It was relatively cheap and a good place to settle down. His father was a writer, so they needed somewhere relatively cheap to live. He went to college in the 1990s in New York. After graduation, he traveled around the U.S. and lived in Oregon for a time. He also lived in Atlanta, Georgia for a time and traveled through Europe, Africa and the Middle East. In 1999, he returned to Montana. He only planned on staying for a year or so to visit family and friends, but he never left. Many people who grow up in the area end up leaving when they grow up due to necessity for their careers. Livingston, Montana is among the tops towns that benefits from the Revenue of tourists who come to Yellowstone and this helps drive the local economy and, therefore, there isn’t much push back about the tourism in the area. He believes that seeing the vastness of Yellowstone and the variety of animals’ present is a humbling experience for anyone. He hopes that 100 years from now people are still able to experience the chilling feeling of the water in the rivers composed of freshly melted snow against their skin
Analysis of variables that influence the logistics costs in transport operations of a company in Colombia
Este artículo en primera medida caracteriza una serie de variables propuestas como los elementos críticos en el impacto a los costos logísticos de las operaciones de transporte de carga en el territorio nacional, seguido entonces por un análisis de percepción a una muestra intencional de empresas del sector, acerca de las mismas; dentro de los hallazgos destacados en la evaluación se reconocen al medio utilizado para transportar y a la distancia de la entrega como los elementos significativos por sus resultados porcentuales opuestos.This paper in first place characterize a number of variables proposed as critic’s elements that impact the logistics costs on the cargoes transports’ operations through the national territory, follow up by a perception analysis of a intentional sample of the transport industry field, about the same, feature findings in the analysis recognize the means of transport and the delivery distance as relevant elements for their perceptual results opposed
The rotation rates of massive stars: How slow are the slow ones?
Context: Rotation plays a key role in the life cycles of stars with masses
above 8 Msun. Hence, accurate knowledge of the rotation rates of such massive
stars is critical for understanding their properties and for constraining
models of their evolution. Aims: This paper investigates the reliability of
current methods used to derive projected rotation speeds v sin i from
line-broadening signatures in the photospheric spectra of massive stars,
focusing on stars that are not rapidly rotating. Methods: We use slowly
rotating magnetic O-stars with well-determined rotation periods to test the
Fourier transform (FT) and goodness-of-fit (GOF) methods typically used to
infer projected rotation rates of massive stars. Results: For our two magnetic
test stars with measured rotation periods longer than one year, i.e., with v
sin i < 1 km/s, we derive v sin i ~ 40-50 km/s from both the FT and GOF
methods. These severe overestimates are most likely caused by an insufficient
treatment of the competing broadening mechanisms referred to as microturbulence
and macroturbulence. Conclusions: These findings warn us not to rely
uncritically on results from current standard techniques to derive projected
rotation speeds of massive stars in the presence of significant additional line
broadening, at least when v sin i <~ 50 km/s. This may, for example, be crucial
for i) determining the statistical distribution of observed rotation rates of
massive stars, ii) interpreting the evolutionary status and spin-down histories
of rotationally braked B-supergiants, and iii) explaining the deficiency of
observed O-stars with spectroscopically inferred v sin i ~ 0 km/s. Further
investigations of potential shortcomings of the above techniques are presently
under way.Comment: 4 pages, 4 figures, accepted for publication in A&A Letter
One More Step Towards Well-Composedness of Cell Complexes over nD Pictures
An nD pure regular cell complex K is weakly well-composed
(wWC) if, for each vertex v of K, the set of n-cells incident to v is
face-connected. In previous work we proved that if an nD picture I is
digitally well composed (DWC) then the cubical complex Q(I) associated
to I is wWC. If I is not DWC, we proposed a combinatorial algorithm
to “locally repair” Q(I) obtaining an nD pure simplicial complex PS(I)
homotopy equivalent to Q(I) which is always wWC. In this paper we give
a combinatorial procedure to compute a simplicial complex PS(¯I) which
decomposes the complement space of |PS(I)| and prove that PS(¯I) is also
wWC. This paper means one more step on the way to our ultimate goal:
to prove that the nD repaired complex is continuously well-composed
(CWC), that is, the boundary of its continuous analog is an (n − 1)-
manifold.Ministerio de Economía y Competitividad MTM2015-67072-
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