958 research outputs found

    Editorial: The War for Talent: Technologies and solutions toward competency and skills development and talent identification

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    This special issue is dedicated to advanced technological solutions and novel methodical approaches toward human capital management in terms of career development, assessment and recruitment as a driver for innovation and sustainable competitive advantage for academia and businesses in the changing conditions of the global employment market, and the War for Talent. Latest competitiveness-driven developments in productivity and services move forward human capital management and assessment technology and services alongside with talent identification as a driver for innovation and key source of maximizing the Return-On-Investment in people and technology in academia and businesses. Governments and businesses start thinking about competency and skills development as the critical issue for the workforce, and the workplaces. Against this background, a complex interrelationship arises between strategic management, human capital management, and the overall quality management in every educational and enterprise setting. In addition, identifying highly competent human capital develops into a challenging issue of the recruitment process.published_or_final_versio

    Development of Atmospheric Monitoring System at Akeno Observatory for the Telescope Array Project

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    We have developed an atmospheric monitoring system for the Telescope Array experiment at Akeno Observatory. It consists of a Nd:YAG laser with an alt-azimuth shooting system and a small light receiver. This system is installed inside an air conditioned weather-proof dome. All parts, including the dome, laser, shooter, receiver, and optical devices are fully controlled by a personal computer utilizing the Linux operating system. It is now operated as a back-scattering LIDAR System. For the Telescope Array experiment, to estimate energy reliably and to obtain the correct shower development profile, the light transmittance in the atmosphere needs to be calibrated with high accuracy. Based on observational results using this monitoring system, we consider this LIDAR to be a very powerful technique for Telescope Array experiments. The details of this system and its atmospheric monitoring technique will be discussed.Comment: 24 pages, 13 figures(plus 3 gif files), Published in NIM-A Vol.488, August 200

    Spirulina extract improves age-induced vascular dysfunction

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    Vascular dysfunction is considered a hallmark of ageing that has been associated with altered vasomotor responses, in which nitric oxide (NO) and reactive oxygen species participate. The consumption of Spirulina extracts, with antioxidant properties, increased recently. Objective: This study investigates the effect of Spirulina aqueous extract (SAE) on the vascular function of the aorta from aged rats. Materials and methods: Aortic segments from aged male Sprague-Dawley rats (20–22 months old) were exposed to SAE (0.1% w/v, for 3 h) to analyse: (i) the vasodilator response induced by acetylcholine (ACh), by the NO donor sodium nitroprusside (SNP), by the carbon monoxide releasing molecule (CORM) and by the KATP channel opener, cromakalim (CK); (ii) the vasoconstrictor response induced by KCl and noradrenaline (NA); (iii) the production of NO and superoxide anion, and (iv) the expression of the p-eNOS and HO-1 proteins. Results: Incubation with SAE increased the expression of p-eNOS (1.6-fold) and HO-1 (2.0-fold), enhanced NO release (1.4-fold in basal and 1.9-fold in ACh-stimulated conditions) while decreased the production of superoxide (0.7-fold). SAE also increased the sensitivity (measured as pEC50) to ACh (control: −7.06 ± 0.11; SAE: −8.16 ± 0.21), SNP (control: −7.96 ± 0.16; SAE: −9.11 ± 0.14) and CK (control: −7.05 ± 0.39; SAE: −8.29 ± 0.53), and potentiated the response to KCl (1.3-fold) and to NA (1.7-fold). Conclusion: The antioxidant properties of SAE improved the vasomotor responses of aorta from aged rats. These results may support the use of Spirulina as a protection against vascular dysfunctionThis study was supported by grants from Comunidad de Madrid(S2013/ABI-2783,‘INSPIRA1-CM’) and Fondo Europeo de Desarrollo Regional to C. O. and M. F., the Spanish Ministerio deCiencia e Innovaci on (CTQ2017-86170-R) to C. O. and by theFondo de Investigaciones Sanitarias del Instituto de Salud Carlos III(PI19/01282) to M.

    Single- and two-particle observables in the Emery model: a dynamical mean-field perspective

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    We compare the dynamical mean-field descriptions of the single-band Hubbard model and the three-band Emery model at the one- and two-particle level for parameters relevant to high-Tc superconductors. We show that even within dynamical mean-field theory, accounting solely for temporal fluctuations, the intrinsic multi-orbital nature of the Emery model introduces effective non-local correlations. These lead to a non-Curie-like temperature-dependence of the magnetic susceptibility, also seen in nuclear magnetic resonance experiments in the pseudogap regime by M. Avramovska, et al. [Journal of Superconductivity and Novel Magnetism 33, 2621 (2020)]. We demonstrate the agreement of our results with these experiments for a large range of dopings and trace back the effective non-local correlations to an emerging oxygen-copper singlet by analyzing a minimal finite-size cluster model. Despite this correct description of the hallmark of the pseudogap at the two-particle level, i.e., the drop in the Knight shift of nuclear magnetic resonance, dynamical mean-field theory fails to properly describe the spectral properties of the pseudogap.Comment: 7 pages, 7 figure
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