Results 101 to 110 of about 58,725,068 (254)

Two‐Block Paths in Oriented Graphs of Large Semidegree

open access: yesJournal of Graph Theory, EarlyView.
ABSTRACT We study the existence of oriented paths with two blocks in oriented graphs under semidegree conditions. A block of an oriented path is a maximal directed subpath. Given positive integers k $k$ and ℓ $\ell $ with k / 2 ≤ ℓ < k $k/2\le \ell \lt k$, we establish a semidegree function that guarantees the containment of every oriented path with ...
Irena Penev   +4 more
wiley   +1 more source

Low‐Intensity Precipitation Dominates Peninsular Spain (1961–2022)

open access: yesInternational Journal of Climatology, EarlyView.
Spatial analysis across Spain shows a shift in precipitation regimes (1961–2022) toward more frequent low‐intensity precipitation and reduced high‐intensity events, with localised increases in heavy precipitation along some coastal areas. This redistribution—captured through changes in precipitation frequency (RF) and volumetric contribution (RC ...
Ahmed M. El Kenawy   +9 more
wiley   +1 more source

Consejo Nacional de Ciencia y Tecnología El Salvador. [PDF]

open access: yes, 2012
El Consejo Nacional de Ciencia y Tecnología de El Salvador (CONACYT) es una institución líder que promueve, fomenta y difunde la ciencia, la tecnología e innovación en el país; por lo cual, la siguiente presentación se aborda puntos esenciales como ...
Consejo Nacional de Ciencia y Tecnología (CONACYT)
core  

Spatiotemporal Characteristics and Synoptic Patterns of Dry‐Hot Winds (Sukhoviys) in Ukraine

open access: yesInternational Journal of Climatology, EarlyView.
This study analyses dry‐hot winds, or sukhoviys, a recurrent phenomenon during the warm season across Ukraine that contributes to rapid moisture loss from soil and vegetation. The activity of sukhoviy events was assessed using the introduced Sukhoviy Station Index, accounting for their meteorological characteristics and frequency of occurrence.
Inna Semenova   +1 more
wiley   +1 more source

La resistencia a la constitucionalización del Derecho administrativo en Colombia: el Consejo de Estado y el caso de los actos discrecionales que ordenan el retiro

open access: yesDíkaion, 2010
El objetivo del presente artículo es analizar la intensidad de la constitucionalización del Derecho administrativo en Colombia, especialmente de los actos administrativos discrecionales que ordenan el retiro de miembros de las Fuerzas Militares, la ...
Vicente F Benítez-Rojas
doaj  

Integrated Photonic Modulator Circuit With Programmable Intensity and Phase Modulation Response

open access: yesLaser &Photonics Reviews, EarlyView.
A platform‐agnostic programmable modulation circuit is introduced to enable tunable and universal optimization of integrated photonic modulators. By flexibly controlling carrier amplitude and phase, the approach adapts to diverse device characteristics without structural redesign.
Hong Deng   +3 more
wiley   +1 more source

Informe de la Relatora Especial de Naciones Unidas sobre venta de niños en el contexto de acuerdos de subrogación de vientres

open access: yesRevista Internacional de Derechos Humanos, 2019
La autora destaca el valor del Informe A/HRC/37/60 de la Relatora Especial del Consejo de Derechos Humanos de Naciones Unidas sobre las prácticas abusivas de los acuerdos de subrogación de vientres –en particular, la venta de niños–, con miras a las ...
Silvia Marrama
doaj  

Controlling the Center of Mass Motion of Levitated Particles Using Structured Wavefronts

open access: yesLaser &Photonics Reviews, EarlyView.
Optically levitated particles have great potential for quantum‐enhanced sensing. Precise control of the trapping beam is crucial to improve the stability and confinement of these systems. Here, we study how structured wavefronts can be used to control the center‐of‐mass motion of levitated particles, enhancing trap stiffness and enabling stable ...
Shah Jee Rahman   +7 more
wiley   +1 more source

Diffraction‐Free Natural Optical Skyrmions and Their Subwavelength Confinement Around Vortices

open access: yesLaser &Photonics Reviews, EarlyView.
ABSTRACT Diffraction causes waves to spread out as they propagate freely. The tighter the lateral confinement, the faster the spreading. Past research on how to suppress diffraction has been based on wave engineering and has led so far to idealized waves that, in real settings, eventually diffract.
Nilo Mata‐Cervera   +4 more
wiley   +1 more source

Fabrication‐Tolerant GaAs/SiN Coupling Above the Loss Threshold for Quantum Photonic Applications

open access: yesLaser &Photonics Reviews, EarlyView.
Reliable low‐loss optical coupling between GaAs and SiN waveguides for heterogeneous integration of single‐photon sources is demonstrated. By developing a fabrication‐aware numerical design approach and accounting for experimentally measured fabrication variations and scattering losses, coupling efficiencies meeting the < 10% loss requirement for ...
Miloš Ljubotina   +9 more
wiley   +1 more source

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