نتایج جستجو برای: wave emergence
تعداد نتایج: 309259 فیلتر نتایج به سال:
The emergence of hard X-ray free electron lasers (XFELs) enables new insights into many fields of science. These new sources provide short, highly intense, and coherent X-ray pulses. In a variety of scientific applications these pulses need to be strongly focused. In this article, we demonstrate focusing of hard X-ray FEL pulses to 125 nm using refractive x-ray optics. For a quantitative analys...
While spiral wave breakup has been implicated in the emergence of atrial fibrillation, its role in maintaining this complex type of cardiac arrhythmia is less clear. We used the Karma model of cardiac excitation to investigate the dynamical mechanisms that sustain atrial fibrillation once it has been established. The results of our numerical study show that spatiotemporally chaotic dynamics in ...
The Fibroscan (Echosens, Paris, France) device based on vibration–controlled transient elastography (VCTE) is used to non– invasively assess liver stiffness correlated to the hepatic fibrosis. Stiffness is quantified by measuring the velocity of a low–frequency shear wave traveling through the liver, which is proportional to the Young’s modulus E. It has been demonstrated that E is highly corre...
The interplay between spectator and participant matter in heavy-ion collisions is investigated in the context of a microscopic transport model. Transport simulations show that flow patterns for the participant matter are strongly influenced by the presence of the nearby spectator matter. However, the influence is mutual. During the explosion of the participant zone, the spectator matter acquire...
The late sixties and early to mid seventies saw and explosion of interest and innovation in the area of frequency domain methods in the analysis and design of multivariable control systems. The emergence of multivariable frequency domain control design techniques in the 1960’s and 1970’s was based on traditional views of the role of the designer in the design process. Classical influences on th...
19 20 Taste stimuli encountered in the natural environment are usually combinations of multiple 21 tastants. Although a great deal is known about how neurons in the taste system respond to 22 single taste stimuli in isolation, less is known about how the brain deals with such mixture 23 stimuli. Here, we probe the responses of single neurons in primary gustatory cortex (GC) of 24 awake rats to ...
Historically, the emergence of e-diasporas occurred in tandem with the diffusion of the Internet and the development of multiple online public services. At the end of the 1990s, a number of institutions joined forces with the new “e”-technologies (eadministration, e-democracy, e-education, e-healthcare, e-culture, e-tourism), which gave rise to the first presence on the Web of associations run ...
Amphibians highlight the global biodiversity crisis because ∼40% of all amphibian species are currently in decline. Species have disappeared even in protected habitats (e.g., the enigmatic extinction of the golden toad, Bufo periglenes, from Costa Rica). The emergence of a fungal pathogen, Batrachochytrium dendrobatidis (Bd), has been implicated in a number of declines that have occurred in the...
نمودار تعداد نتایج جستجو در هر سال
با کلیک روی نمودار نتایج را به سال انتشار فیلتر کنید