Results 31 to 40 of about 3,805,307 (284)

Multilocus sequence types of invasive Corynebacterium diphtheriae isolated in the Rio de Janeiro urban area, Brazil [PDF]

, 2012
Invasive infections caused by Corynebacterium diphtheriae in vaccinated and non-vaccinated individuals have been reported increasingly. In this study we used multilocus sequence typing (MLST) to study genetic relationships between six invasive strains of
Azevedo, V., Baldwin, Adam, Bolt, F., Dowson, Christopher G., Guiso, N., Hirata, R., Mattos-Guaraldi, A. L., Miyoshi, A., Pacheco, L. G. C., Rosso, M. L., Santos, L. S., Soares, S. C., Viguetti, S. Z.   +12 more
core   +1 more source

Orientable and Negative Orientable Sequences

Discrete Applied Mathematics
Analogously to de Bruijn sequences, orientable sequences have application in automatic position-location applications and, until recently, studies of these sequences focused on the binary case. In recent work by Alhakim et al., a range of methods of construction were described for orientable sequences over arbitrary finite alphabets; some of these ...
Chris J. Mitchell, Peter R. Wild
openaire   +2 more sources

Unbalanced and Reactive Currents Compensation in Three-Phase Four-Wire Sinusoidal Power Systems

Applied Sciences, 2020
In an unbalanced linear three-phase electrical system, there are inefficient powers that increase the apparent power supplied by the network, line losses, machine malfunctions, etc.
Rafael Montoya-Mira, Pedro A. Blasco, José M. Diez, Rafael Montoya, Miguel J. Reig   +4 more
doaj   +1 more source

The negative sequence impedance as fault indicator in induction motors

Revista Facultad de Ingeniería Universidad de Antioquia, 2013
An algorithm to detect inter-turn faults in induction motors based on the negative sequence impedance is presented in this paper. The implementation through a digital prototype is also explained and its results are tested using a 3 Hp induction motor ...
Fernando Villada, Diego Raúl Cadavid, José Edinson Aedo, Bernardo Andrés Benavides, Esteban Velilla   +4 more
doaj   +3 more sources

Universal flattening of Frobenius

, 2011
For a variety $X$ of positive characteristic and a non-negative integer $e$, we define its $e$-th F-blowup to be the universal flattening of the $e$-iterated Frobenius of $X$.
Yasuda, Takehiko
core   +1 more source

Generalized exponents of small representations. I [PDF]

, 2009
This is the first paper in a sequence devoted to giving manifestly non-negative formulas for generalized exponents of small representations in all types.
Ion, Bogdan
core   +2 more sources

Shotgun metagenomic sequencing in culture negative microbial keratitis

European Journal of Ophthalmology, 2023
Purpose To evaluate the microbiota of culture negative Corneal Impression Membrane (CIM) microbial keratitis samples with the use of shotgun metagenomics analysis. Methods DNA of microbial keratitis samples were collected with CIM and extracted using the MasterPure™ Complete DNA and RNA Purification Kit (Epicentre).
Davide Borroni, Chiara Bonzano, José-María Sánchez-González, Rahul Rachwani-Anil, Francisco Zamorano-Martín, Jorge Pereza-Nieves, Carlo Enrico Traverso, María García Lorente, Marina Rodríguez-Calvo-de-Mora, Alfonso Esposito, Fernando Godin, Carlos Rocha-de-Lossada   +11 more
openaire   +4 more sources

Performance Evaluation of a Novel Sequence-Based Directional Detection Strategy for Protection of Active Distribution Networks

IEEE Access
Directional elements are relied on to achieve selectivity in fault detection in power systems. Although such elements have been deployed successfully for many years, there is an increased need for novel methods to deal with the unique challenges of ...
Kwasi Opoku, Aleksandar Dimitrovski, Maximiliano Ferrari   +2 more
doaj   +1 more source

Impact of Solar Inverter Dynamics during Grid Restoration Period on Protection Schemes Based on Negative-Sequence Components

Energies, 2022
The growing penetration of renewable resources such as wind and solar into the electric power grid through power electronic inverters is challenging grid protection.
Almir Ekic, Di Wu, John N. Jiang
doaj   +1 more source

Calculation of some determinants using the s-shifted factorial [PDF]

, 2004
Several determinants with gamma functions as elements are evaluated. This kind of determinants are encountered in the computation of the probability density of the determinant of random matrices. The s-shifted factorial is defined as a generalization for
Abramowitz M, Aigner M, Bateman H, Bateman H, Bateman H, Comtet L, Gradshteyn I S, Jean-Marie Normand, Krattenthaler C, Mehta M L, Mehta M L, Mehta M L, Mehta M L, Moussa P, Normand J-M Mehta M L, Penson K A, Rosen K H, Rota G-C   +17 more
core   +4 more sources