Human resource management in Spain : are cultural barriers preventing the adoption of global practices?

This paper addresses the extent to which culture is affecting the adoption of global human resource management (HRM) practices by Spanish organizations. One of our main objectives was to offer a thorough review of the recent empirical evidence regarding HRM practices in Spanish organizations. Another goal was to discuss these findings in light of the Spanish culture in order to identify possible cultural barriers to the adoption of global HRM practices. Our results suggest that Spanish organizations are slowly adopting global practices; however, many traditional practices remain. We suggest that the cultural variables of low future orientation, high power distance, and low institutional collectivism may exert continuing pressures that will hinder the adoption of certain global HRM practices.En este artículo estudiamos hasta qué punto la cultura está afectando a la implementación de prácticas globales de GRH por parte de organizaciones españolas. Uno de nustros objetivos principales es ofrecer una revisión profunda de la evidencia empírica reciente sobre las prácticas de GRH en organizaciones españolas. Nuestro segundo objetivo consiste en discutir dicha evidencia desde el punto de vista de la cultura española con el objeto de identificar posibles barreras culturales a la adopción de las prácticas globales de GRH. Nuestras conclusiones sugieren que las organizaciones españolas están adoptando lentamente prácticas globales, sin embargo, aún persisten muchas prácticas tradicionales. Sugerimos que variables culturales como baja orientación al futuro, alta distancia de poder y bajo colectivismo institucional pueden seguir ejerciendo presiones continuas que dificultarán la adopción de ciertas prácticas globales de GRH.Publicad

Magnetoswitching of current oscillations in diluted magnetic semiconductor nanostructures

Strongly nonlinear transport through Diluted Magnetic Semiconductor multiquantum wells occurs due to the interplay between confinement, Coulomb and exchange interaction. Nonlinear effects include the appearance of spin polarized stationary states and self-sustained current oscillations as possible stable states of the nanostructure, depending on its configuration and control parameters such as voltage bias and level splitting due to an external magnetic field. Oscillatory regions grow in size with well number and level splitting. A systematic analysis of the charge and spin response to voltage and magnetic field switching of II-VI Diluted Magnetic Semiconductor multiquantum wells is carried out. The description of stationary and time-periodic spin polarized states, the transitions between them and the responses to voltage or magnetic field switching have great importance due to the potential implementation of spintronic devices based on these nanostructures.Comment: 14 pages, 4 figures, Revtex, to appear in PR

Galactic runaway O and Be stars found using Gaia DR3

A relevant fraction of massive stars are runaway stars. These stars move with a significant peculiar velocity with respect to their environment. We aim to discover and characterize the population of massive and early-type runaway stars in the GOSC and BeSS catalogs using Gaia DR3 astrometric data. We present a 2-dimensional method in the velocity space to discover runaway stars as those that deviate significantly from the velocity distribution of field stars, which are considered to follow the Galactic rotation curve. We found 106 O runaway stars, 42 of which were not previously identified as runaways. We found 69 Be runaway stars, 47 of which were not previously identified as runaways. The dispersion of runaway stars is a few times higher in Z and b than that of field stars. This is explained by the ejections they underwent when they became runaways. The percentage of runaways is 25.4% for O-type stars, and it is 5.2% for Be-type stars. In addition, we conducted simulations in 3 dimensions for our catalogs. They revealed that these percentages could increase to ~30% and ~6.7%, respectively. Our runaway stars include seven X-ray binaries and one gamma-ray binary. Moreover, we obtain velocity dispersions of ~5 km/s perpendicular to the Galactic plane for O- and Be-type field stars. These values increase in the Galactic plane to ~7 km/s for O-type stars due to uncertainties and to ~9 km/s for Be-type stars due to Galactic velocity diffusion. The excellent Gaia DR3 astrometric data have allowed us to identify a significant number of O-type and Be-type runaways in the GOSC and BeSS catalogs. The higher percentages and higher velocities found for O-type compared to Be-type runaways underline that the dynamical ejection scenario is more likely than the binary supernova scenario. Our results open the door to identifying new high-energy systems among our runaways by conducting detailed studies.Comment: 20 pages, 20 figures. Accepted for publication in A&

Non-Equilibrium Dynamics and Superfluid Ring Excitations in Binary Bose-Einstein Condensates

We revisit a classic study [D. S. Hall {\it et al.}, Phys. Rev. Lett. {\bf 81}, 1539 (1998)] of interpenetrating Bose-Einstein condensates in the hyperfine states $\ket{F = 1, m_f = -1}\equiv\ket{1}$ and $\ket{F = 2, m_f = +1}\equiv\ket{2}$ of ${}^{87}$Rb and observe striking new non-equilibrium component separation dynamics in the form of oscillating ring-like structures. The process of component separation is not significantly damped, a finding that also contrasts sharply with earlier experimental work, allowing a clean first look at a collective excitation of a binary superfluid. We further demonstrate extraordinary quantitative agreement between theoretical and experimental results using a multi-component mean-field model with key additional features: the inclusion of atomic losses and the careful characterization of trap potentials (at the level of a fraction of a percent).Comment: 4 pages, 3 figures (low res.), to appear in PR

Printed circuit board coil design with reduced series resistance for high power inductive wireless power transmission systems

Due to the growing use of the popular wireless power transmission (WPT) technology, an innovative method of coil design and optimization is presented in this paper. This method has been applied to develop spiral printed circuit board (PCB) coils with litz-wire structure. From the geometry definition, the design process is carried out by means of finite element analysis (FEA). In addition, as a complement to the design process, some prototypes of spiral PCB coils were built to contrast the simulation results and experimental measurements by means of the small-signal characterization, which reflects the success of the applied method

Principales componentes químicos y parámetros físicos del queso de Los Pedroches

Se ha determinado la composición química bruta, los principales componentes mmerales y dos parámetros físicos, el pH y la ow, de un lote heterogéneo de 16 quesos de Los Pedroches maduros, elaborados todos eUos por productores diferentes. Los valores medios hallados, que pueden considerarse como representativos de esta variedad de queso, han sido: humedad 34,5 O/o, proteínas 3 1,7 0/o, gras:J 26,7 Ofo, ácido láctico 1,5 0/o y cenizas 6,3 0/o. Sobre la base de la m~tcria seca, el contenido medio en sal es del 4,8 0/o, el de calcio de 1 ,S 0/o y el de fósforo de 1,2 Ofo (relación Ca/1' = 1,27). El valor pll medio es de 5,45 y la aw de 0,90

Estado de degradación proteolítica del queso de Los Pedroches

Las imágenes electroforéticas en gel de poliacrilamida de seis muestras de quesos de los Pedroches maduros, elaborados por diferentes productores, indican que la as-caseína aparece más degradada en todos los quesos que la B-caseína, que apenas es hidrolizada en algunos quesos. La hidrólisis enzimática de la as-caseína (fundamentalmente de la as2- y as3-) origina cuatro productos de escisión de mayor movilidad. La degradación proteolítica de la B-caseína rinde siete fragmentos polipeptídicos de alto peso molecular y baja movilidad electroforética, que se sitúan en la región de la K • y y-caseína. Algunos de estos polipéptidos pueden corresponder a caseínas minoritarias equivalentes a la y-,, TS- y R-caseína eencontradas en qquesos maduros eelaborados con leche de vaca

Angiogenesis in the Gonadal Capillary Network of the Chick Embryo

Seventy-one chick embryos of both sexes at the 35 Hamburger and Hamilton (H-H) developmental stage were processed for scanning electron microscopy of vascular corrosion casts and of critical point dried specimens, as well as transmission electron- and light microscopy, in order to study the angiogenic structures. The gonadal subepithelial capillary network was located at the level of the tunica albuginea under the covering epithelium. The casts showed a densely-meshed capillary network and numerous sprouting (nodular protrusions or capillary sprouts) and non-sprouting (enlarged vessels and angiogenic holes) angiogenic structures that were randomly distributed and mixed. Four types of angio-genic holes were encountered in the casts: primary (diameter \u3c 2.5 μm), secondary (diameter \u3e 2.5 μm), tertiary (variable diameter and circular narrowings on one side), and open angiogenic holes. We suggest that the different morphologies reflect evolution of these holes. Furthermore, the open angiogenic hole would probably either form nodular protrusions at its open ends, which tend to join with other nodular protrusions and neighboring capillaries and form new vessels; or there would be fusion with two or more neighboring open holes. Correlative critical point dried sections showed fenestrations in the capillary walls and transcapillary pillars that corresponded to the angiogenic holes found in the casts. Ultrathin sections of the vessels presented typical characteristics of growing endothelium: large nuclei with loosely textured chromatin, abundant cytoplasm rich in cell organelles and intraluminal endothelial processes