1,721,295 research outputs found
A Numerical Study on the Robustness of Ultrawide Band Wearable Antennas with Respect to the Human Body Proximity
No full textIn this work, the behavior of Ultrawide band (UWB) wearable antennas in terms of robustness to the human body proximity is numerically investigated, aiming to improve this robustness. It will be shown that this robustness can be related with the electric energy density distribution in the near field region around the antenna, similarly with the case of narrowband wearable antennas. The simulations have been performed using CST Microwave Studio, a commercial general-purpose software for the electromagnetic simulation of three-dimensional high-frequency components
Machine Learning for Predicting Colorectal Surgery Outcomes Through Pre- and Intra-operative Parameters and Techniques
No full textNo abstract available
Need to define right mesocolectomy and complete mesocolic excision concept: how, when and why?
No full textNo abstract avaiable
Arachidonic acid metabolism in inflammatory cells of patients with bronchial asthma
No full textOver the last few years, the demonstration of bene®cial effects of leukotriene
receptor antagonists in various forms of asthma has renewed clinical and
pharmacologic interest in this class of lipid mediators. Several studies
demonstrated an increased biosynthesis of cysteinyl leukotrienes (CysLT) in
asthmatic patients. However, the reasons for the dysregulated production of
CysLTs in asthmatic patients are not completely de®ned. An improved method
of lipid mediator detection and the availability of cells isolated from human
airways (by bronchoalveolar lavage [BAL] and bronchial biopsies) have allowed
initial studies to address this issue. Eosinophils retrieved from in ̄amed airways
of asthmatics have a larger arachidonic acid (AA) content than their blood
counterpart. The high level of AA in these cells is primarily due to a remodeling
of endogenous arachidonate pools with the accumulation of this fatty acid in a
triglyceride-associated pool. In addition, elevated levels of a secretory form of
phospholipase A2, the key enzyme initiating the cascade of CysLTs, are found in
the BAL of asthmatics. Finally, eosinophils isolated from the BAL of asthmatics
have an increased expression of LTC4 synthase. The level of expression of this
enzyme correlates with the increased amount of CysLTs produced in the airways
of these patients. Taken together, these data identify at least two possible
mechanisms to explain the excessive CysLT production in asthmatics:
1) an increased content of AA in the glycerolipid pools of in ̄ammatory
cells
2) an enhanced activity of key biosynthetic enzymes involved in CysLT
synthesis
Effective-range signatures in quasi-1D matter waves: Sound velocity and solitons
No full textWe investigate ultracold and dilute bosonic atoms under strong transverse harmonic confinement using a 1D modified Gross-Pitaevskii equation (1D MGPE), which accounts for the energy dependence of the two-body scattering amplitude within an effective-range expansion. We study sound waves and solitons of the quasi-1D system, comparing the 1D MGPE results with the 1D GPE ones. We find that when the finite-size nature of the interaction is taken into account, the speed of sound and the density profiles of both dark and bright solitons show relevant quantitative changes with respect to predictions given by the standard 1D GPE
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