Results 51 to 60 of about 88,729 (198)
Nordic Journal of Botany, EarlyView.Cybianthus anthuriophyllus (Primulaceae) was previously known from eastern Ecuador and northern Peru. Here we document the first confirmed occurrences of this species in Colombia and develop a distribution model based on collections from the Andean–Amazonian foothills of Caquetá, Cauca, and Putumayo departments, in order to clarify its conservation ...
David Hoyos +4 more
wiley +1 more source
Polymer Composites, EarlyView.Thermal, microstructural, and mechanical characterization of 3D‐printed PLA composite parts. ABSTRACT To address plastic waste and agricultural residue underutilization, this study evaluates the thermal (DSC and FTIR), microstructural (SEM), and mechanical behavior of polylactic acid (PLA) reinforced with flax fibers and olive pit particles, processed ...
P. N. B. Reis +6 more
wiley +1 more source
A Model for Induction Motors with Non-Uniform Air-Gap [PDF]
, 2005 Equations to calculate inductances of induction motors, considering non-uniform air-gap, are proposed. The analyzed air-gap variations are static and dynamic eccentricity and stator slots.
Bossio, Guillermo Rubén +4 more
core
Exploring Costa Rica's fungal trends: Insights from digitized specimens
PLANTS, PEOPLE, PLANET, EarlyView.Fungi are essential to tropical ecosystems but remain largely absent from conservation agendas. By analyzing over 78,000 fungal records from Costa Rica—a globally recognized biodiversity hotspot—this study reveals key patterns in fungal diversity, distribution, and seasonality.
Melissa Mardones +2 more
wiley +1 more source
Ingeniería, 2019 El método de los elementos finitos (FEM) es una técnica numérica ampliamente utilizada en física e ingeniería, que aproxima soluciones de ecuaciones diferenciales en derivadas parciales en dominios arbitrarios.
Francisco José Benavides
doaj +1 more source
Carrier Frequency Offset Compensation for OFDMA Systems Using Circular Banded Matrices [PDF]
, 2013 Orthogonal frequency division multiple access (OFDMA) is a multiuser communication technique that allocates to each user a set of orthogonal carriers. In the presence of carrier frequency offset (CFO) the orthogonality among carriers is lost and it is ...
Cousseau, Juan Edmundo +2 more
core
Exact analytical helmholtz bright and dark solitons [PDF]
, 2004 In this paper, exact analytical Helmholtz bright and dark soliton solutions for a Kerr nonlinearity are presented. Numerical simulations verify that these solutions are both robust and act as attractors in nonlinear beam dynamics.
Chamorro-Posada, P, McDonald, GS
core +2 more sources
Optimal Homogeneous ℒp$$ {\boldsymbol{\mathcal{L}}}_{\boldsymbol{p}} $$‐Gain Controller
International Journal of Robust and Nonlinear Control, EarlyView.ABSTRACT Nonlinear ℋ∞$$ {\mathscr{H}}_{\infty } $$‐controllers are designed for arbitrarily weighted, continuous homogeneous systems with a focus on systems affine in the control input. Based on the homogeneous ℒp$$ {\mathcal{L}}_p $$‐norm, the input–output behavior is quantified in terms of the homogeneous ℒp$$ {\mathcal{L}}_p $$‐gain as a ...
Daipeng Zhang +3 more
wiley +1 more source
Centro de Ingeniería y Desarrollo Industrial
Mundo Nano, 2016 RESUMEN: CIDESI es un centro de ingeniería, perteneciente al Sistema de Centros Públicos del CONACyT, fundado hace 33 años. Está organizado en 4 direcciones adjuntas, 6 direcciones temáticas y 5 sedes: Querétaro, Nuevo León, Estado de México, Baja ...
Jesús González Hernández
doaj +1 more source
Optimal Gain Selection for the Arbitrary‐Order Homogeneous Differentiator
International Journal of Robust and Nonlinear Control, EarlyView.ABSTRACT Differentiation of noisy signals is a relevant and challenging task. Widespread approaches are the linear high‐gain observer acting as a differentiator and Levant's robust exact differentiator with a discontinuous right‐hand side. We consider the family of arbitrary‐order homogeneous differentiators, which includes these special cases.
Benjamin Calmbach +2 more
wiley +1 more source