Results 51 to 60 of about 52,867 (249)

Microcin J25 Exhibits Inhibitory Activity Against Salmonella Newport in Continuous Fermentation Model Mimicking Swine Colonic Conditions

Frontiers in Microbiology, 2020
Microcin J25 (MccJ25), a 21-amino acid bacteriocin produced by Escherichia coli (E. coli), is a potent inhibitor of Enterobacteriaceae, including pathogenic E. coli, Salmonella, and Shigella.
Sabrine Naimi, Séverine Zirah, Menel Ben Taher, Jérémie Theolier, Benoît Fernandez, Sylvie Françoise Rebuffat, Ismail Fliss   +6 more
doaj   +1 more source

Measuring vertebrate telomeres: applications and limitations [PDF]

, 2004
Telomeres are short tandem repeated sequences of DNA found at the ends of eukaryotic chromosomes that function in stabilizing chromosomal end integrity.
Allsopp RC, Barja G, Benetos A, Broccoli D, Chang E, Charnov E, Friedrich U, Gemmell NJ, Girondot M, Grant JD, Harley CB, IUCN, Jeanclos E, Kern S, Lambertsen RH, Meyne J, Miyashita N, Ogburn CE, Olsen E, Prowse KR, Rose MR, Slagboom PE, Stearns SC, Stearns SC, Turker M, Vaziri H, Watson J, Zeichner SL   +27 more
core   +1 more source

Non-averaged regularized formulations as an alternative to semi-analytical orbit propagation methods

, 2019
This paper is concerned with the comparison of semi-analytical and non-averaged propagation methods for Earth satellite orbits. We analyse the total integration error for semi-analytical methods and propose a novel decomposition into dynamical, model ...
Amato, Davide, Baù, Giulio, Bombardelli, Claudio, Morand, Vincent, Rosengren, Aaron J.   +4 more
core   +1 more source

STELA: a community-centred approach to norm elicitation for AI alignment

Scientific Reports
Value alignment, the process of ensuring that artificial intelligence (AI) systems are aligned with human values and goals, is a critical issue in AI research.
Stevie Bergman, Nahema Marchal, John F. J. Mellor, Shakir Mohamed, Iason Gabriel, William Isaac   +5 more
semanticscholar   +1 more source

A Maya Stela From The Ethnographical Museum Of Geneva

Amerindia, 2020
: This article aims to present new elements connected to a Maya stela kept in the Ethnographical Museum of Geneva. We show more clearly which glyphs are readable from this inscription and then present elements which could correlate this information and ...
J. Hoppan, Alexandre Solcà
semanticscholar   +1 more source

Waka’ Stela 44 and the Early Classic Kaan hegemony

Ancient Mesoamerica
The Kaan (“Snake”) kings, a powerful political entity in the Classic Maya Lowlands, were housed in the Early Classic period at Dzibanche, and they moved their capital to Calakmul by the year a.d. 642 (Helmke and Awe 2016; Martin 2020:138–139).
Mary Kate Kelly, Olivia C. Navarro-Farr, David A. Freidel, Juan Carlos Pérez Calderón, Griselda Pérez Robles   +4 more
semanticscholar   +1 more source

Successive Convex Approximation Algorithms for Sparse Signal Estimation with Nonconvex Regularizations

, 2018
In this paper, we propose a successive convex approximation framework for sparse optimization where the nonsmooth regularization function in the objective function is nonconvex and it can be written as the difference of two convex functions. The proposed
Chatzinotas, Symeon, Ottersten, Björn, Pesavento, Marius, Yang, Yang   +3 more
core   +1 more source

Pathologies of hyperbolic gauges in general relativity and other field theories [PDF]

, 1998
We present a mathematical characterization of hyperbolic gauge pathologies in general relativity and electrodynamics. We show how non-linear gauge terms can produce a blow-up along characteristics and how this can be identified numerically by performing ...
Alcubierre, Miguel, Masso, Joan
core   +2 more sources

A Sixth Dynasty Stela from Abydos

مجلة الدراسات التاریخیة والحضاریة المصریة, 2020
The subject of this article is to publish a complete scientific publishing for an old kingdom stela which is related to a high official who was contemporary to the late of the Old Kingdom , Ny-Ppy was the name of the owner of the current stela, who might
أحمد حمدي عبد المنعم محمد حسين
semanticscholar   +1 more source

On the Megalithic Sites of the Gurage Highlands: A Study of Enigmatic Nature of Engravings and Megalith Builders

Ethiopian Journal of the Social Sciences and Humanities, 2008
The megalithic culture in Ethiopia consists of stelae, dolmens, and tumuli which are extensively distributed throughout the country. Compared to the extent of the distribution, however, the initial tasks of methodical survey and locating them have been ...
Worku Derara
doaj   +1 more source