Manuel Arrayás
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View article: Fitness Effect of the Isoniazid Resistance Mutation S315T of the Catalase-Peroxidase Enzyme KatG of <i>Mycobacterium tuberculosis</i>
Fitness Effect of the Isoniazid Resistance Mutation S315T of the Catalase-Peroxidase Enzyme KatG of <i>Mycobacterium tuberculosis</i> Open
The mutation S315T of the catalase–peroxidase (CP) protein KatG of Mycobacterium tuberculosis is the most common mutation that confers resistance to the prodrug isoniazid. Here, we reconstruct its evolutionary history in 145 whole-genome s…
View article: Phase field modeling of the detachment of bubbles from a solid substrate
Phase field modeling of the detachment of bubbles from a solid substrate Open
We develop and implement numerically a phase field model for the evolution and detachment of a gas bubble resting on a solid substrate and surrounded by a viscous liquid. The bubble has a static contact angle θ and will be subject to gravi…
View article: Progress on Levitating a Sphere in Cryogenic Fluids
Progress on Levitating a Sphere in Cryogenic Fluids Open
We present the working prototype of a levitation system designed for investigation of flows in cryogenic helium fluids. The current device allows the levitation of a superconducting sphere and has several provisions made for allowing preci…
View article: Machine learning techniques in magnetic levitation problems
Machine learning techniques in magnetic levitation problems Open
This work was funded by Universidad Rey Juan Carlos, Spain , Programa Propio: Analysis, modelling and simulations of singular structures in continuum models, M2604.
View article: Progress on levitating a sphere in cryogenic fluids
Progress on levitating a sphere in cryogenic fluids Open
We present the working prototype of a levitation system designed for investigation of flows in cryogenic helium fluids. The current device allows the levitation of a superconducting sphere and has several provisions made for allowing preci…
View article: Levitating frogs, machine learning and elliptic integrals
Levitating frogs, machine learning and elliptic integrals Open
We present the calculation of the stability region of a perfect diamagnet levitated in a magnetic field created by a circular current loop. We make use of the machine learning technique of automatic differentiation to illustrate the calcul…
View article: Endophytic Microbes Are Tools to Increase Tolerance in Jasione Plants Against Arsenic Stress
Endophytic Microbes Are Tools to Increase Tolerance in Jasione Plants Against Arsenic Stress Open
Seed microbiota is becoming an emergent area of research. Host plant microbial diversity is increasingly well described, yet relatively little is known about the stressors driving plant endomicrobiota at the metaorganism level. The present…
View article: Design of a system for controlling a levitating sphere in superfluid 3He at extremely low temperatures
Design of a system for controlling a levitating sphere in superfluid 3He at extremely low temperatures Open
We present a new mechanical probe to study the properties of superfluid 3 He at microkelvin temperatures down to 100µK. The setup consists of a set of coils for levitating a superconducting sphere and controlling its motion in a wide varie…
View article: Null Electromagnetic Fields from Dilatation and Rotation Transformations of the Hopfion
Null Electromagnetic Fields from Dilatation and Rotation Transformations of the Hopfion Open
The application of topology concepts to Maxwell equations has led to the developing of the whole area of electromagnetic knots. In this paper, we apply some symmetry transformations to a particular electromagnetic knot, the hopfion field, …
View article: The method of Fourier transforms applied to electromagnetic knots
The method of Fourier transforms applied to electromagnetic knots Open
The Fourier transform method can be applied to obtain electromagnetic knots,\nwhich are solutions of Maxwell equations in vacuum with non-trivial topology of\nthe field lines and especial properties. The program followed in this work\nallo…
View article: Driving nanomechanical resonators by phonon flux in superfluid \(\mathbf{^4He}\)
Driving nanomechanical resonators by phonon flux in superfluid \(\mathbf{^4He}\) Open
We report on nanomechanical resonators with very high-quality factors operated as mechanical probes in liquid helium \(^4\mathrm{He}\), with special attention to the superfluid regime down to millikelvin temperatures. Such resonators have …
View article: Spin-Orbital Momentum Decomposition and Helicity Exchange in a Set of Non-Null Knotted Electromagnetic Fields
Spin-Orbital Momentum Decomposition and Helicity Exchange in a Set of Non-Null Knotted Electromagnetic Fields Open
We calculate analytically the spin-orbital decomposition of the angular momentum using completely nonparaxial fields that have a certain degree of linkage of electric and magnetic lines. The split of the angular momentum into spin-orbital …
View article: On the Fibration Defined by the Field Lines of a Knotted Class of Electromagnetic Fields at a Particular Time
On the Fibration Defined by the Field Lines of a Knotted Class of Electromagnetic Fields at a Particular Time Open
A class of vacuum electromagnetic fields in which the field lines are knotted curves are reviewed. The class is obtained from two complex functions at a particular instant t = 0 so they inherit the topological properties of red the level c…