Results 11 to 20 of about 146,853 (162)

Microbial drivers of root plasticity. [PDF]

New Phytol
Summary Soils are highly heterogeneous and dynamic systems, experiencing a constant flow of plant root exudates and moisture fluctuations that affect nutrient distribution, soil physicochemical properties, and microbial metabolisms. Plant roots adjust their development within the soil matrix (growth, branching, root angle, and anatomical features) by ...
Dini-Andreote F, Wells DM, Atkinson JA, Atkinson BS, Finkel OM, Castrillo G.   +5 more
europepmc   +2 more sources

Time-Frequency Analysis and Neural Networks for Detecting Short-Circuited Turns in Transformers in Both Transient and Steady-State Regimes Using Vibration Signals

Applied Sciences, 2023
Transformers are vital elements in electrical networks, but they are prone to various faults throughout their service life. Among these, a winding short-circuit fault is of particular concern to researchers, as it is a crucial and vulnerable component of
David Granados-Lieberman, Jose R. Huerta-Rosales, Jose L. Gonzalez-Cordoba, Juan P. Amezquita-Sanchez, Martin Valtierra-Rodriguez, David Camarena-Martinez   +5 more
doaj   +1 more source

Convolutional Neural Network and Motor Current Signature Analysis during the Transient State for Detection of Broken Rotor Bars in Induction Motors

Sensors, 2020
Although induction motors (IMs) are robust and reliable electrical machines, they can suffer different faults due to usual operating conditions such as abrupt changes in the mechanical load, voltage, and current power quality problems, as well as due to ...
Martin Valtierra-Rodriguez, Jesus R. Rivera-Guillen, Jesus A. Basurto-Hurtado, J. Jesus De-Santiago-Perez, David Granados-Lieberman, Juan P. Amezquita-Sanchez   +5 more
doaj   +1 more source

An Explainable Machine Learning Approach Based on Statistical Indexes and SVM for Stress Detection in Automobile Drivers Using Electromyographic Signals

Sensors, 2021
The economic and personal consequences that a car accident generates for society have been increasing in recent years. One of the causes that can generate a car accident is the stress level the driver has; consequently, the detection of stress events is ...
Olivia Vargas-Lopez, Carlos A. Perez-Ramirez, Martin Valtierra-Rodriguez, Jesus J. Yanez-Borjas, Juan P. Amezquita-Sanchez   +4 more
doaj   +1 more source

DESIGN AND IMPLEMENTATION OF A PROPOSAL TO TEACH BASIC CONCEPTS IN PRIMARY PHYSICAL BASED ON THE THEORY OF MEANINGFUL LEARNING

Revista de la Facultad de Ciencias, 2015
This article discloses an experimental strategy that aims to contribute to science education in Colombia, through a proposal focusing on learning the concept of force.
Diana Paola Martínez-Salcedo, Rodrigo Covaleda   +1 more
doaj   +1 more source

Sistemas geomorfológicos dinâmicos não-lineares: Uma revisão

Geopauta, 2023
A ciência da complexidade apresentou uma proposta de ruptura paradigmática no meio científico. Entre outros avanços sua maior contribuição é na compreensão dos sistemas dinâmicos não-lineares, que predominam na natureza, revolucionando assim o conceito ...
Matheus Silveira de Queiroz, José Alberto Lima de Carvalho   +1 more
doaj   +1 more source

Resource suitability drives low use of avian-excavated tree cavities: A multi-state occupancy dynamics approach. [PDF]

J Anim Ecol
Birds that nest in tree cavities are sometimes dependent on a few cavity‐excavating bird species to make nesting sites available. Such interdependency, however, does not always materialize because excavated cavities may be unsuitable for continued use, even when available for several years after excavation.
Zavala DJ, Cockle KL, Gomez MR, Ferreyra CA, Bonaparte EB, Di Sallo FG, Ferraz G.   +6 more
europepmc   +2 more sources

Quenched Disorder Effects on Deterministic Inertia Ratchets

, 2001
The effect of quenched disorder on the underdamped motion of a periodically driven particle on a ratchet potential is studied. As a consequence of disorder, current reversal and chaotic diffusion may take place on regular trajectories. On the other hand,
A. L. Salas-brito, C. M. Arizmendi, Fereydoon Family, Laboratorio De Sistemas Dinámicos   +3 more
core   +2 more sources

Clasificación de la expresión del receptor 2 del factor de crecimiento epidérmico humano en tejido mamario canceroso mediante inteligencia artificial

Biomédica: revista del Instituto Nacional de Salud
Introducción. El análisis histológico y molecular del tejido mamario es clave para el diagnóstico, el pronóstico y el tratamiento del cáncer de mama. Entre los biomarcadores evaluados, se destacan los receptores de progesterona, los de estrógeno y el ...
Leidy Verónica Villota, Jessica Julieth Lasso, Elvia Noelia Muñoz, Rubiel Vargas   +3 more
doaj   +1 more source

Predictive Data Mining Techniques for Fault Diagnosis of Electric Equipment: A Review

Applied Sciences, 2020
Data mining is a technological and scientific field that, over the years, has been gaining more importance in many areas, attracting scientists, developers, and researchers around the world.
Arantxa Contreras-Valdes, Juan P. Amezquita-Sanchez, David Granados-Lieberman, Martin Valtierra-Rodriguez   +3 more
doaj   +1 more source