Effects of web-based electrocardiography simulation on strategies and learning styles

Objective: To identify the association between the use of web simulation electrocardiography and the learning approaches, strategies and styles of nursing degree students. Method: A descriptive and correlational design with a one-group pretest– posttest measurement was used. The study sample included 246 students in a Basic and Advanced Cardiac Life Support nursing class of nursing degree. Results: No significant differences between genders were found in any dimension of learning styles and approaches to learning. After the introduction of web simulation electrocardiography, significant differences were found in some item scores of learning styles: theorist (p < 0.040), pragmatic (p < 0.010) and approaches to learning. Conclusion: The use of a web electrocardiogram (ECG) simulation is associated with the development of active and reflexive learning styles, improving motivation and a deep approach in nursing students

PRIVACIÓN DE SUEÑO PARA EL ESTUDIO ELECTROENCEFALOGRÁFICO. EXPERIENCIA DEL PERSONAL DE ENFERMERÍA

The electroencephalogram (EEG) is a technique that allows obtaining the registration of cerebral electric waves. One of the modalities of this technique is the sleep deprivation electroencephalogram. This approach is recommended, fundamentally, when by means of a routine EEG, it is suspected that the patient has epilepsy, since it has been showed that 20% of the EEG recording using sleep deprivation shows epileptiform activity no detected with the conventional EEG. It is of great importance the the work of the nurse in the correct performance of this procedure. Also, in this work, a retrospective study (January 2003- May 2006), was carried out taking into account the EEG with sleep deprivation carried out in our department.El electroencefalograma (EEG) es una técnica que permite obtener el registro de las ondas eléctricas cerebrales. Una de las modalidades de esta técnica lo constituye el EEG con privación de sueño. Este proceder se indica fundamentalmente cuando, por medio de la realización de un EEG rutinario, se sospecha de estar en presencia de un paciente con epilepsia ya que el 20 % de los registros de EEG con privación de sueño muestran actividad epileptiforme no detectada en el EEG convencional. Resulta de vital importancia el desempeño del personal de enfermería en la correcta realización de esta técnica. En este trabajo se realizó, además, un estudio retrospectivo (Enero 2003 - Mayo 2006) de los EEGs con privación de sueño llevados a cabo en nuestro departamento

Redshift-space effects in voids and their impact on cosmological tests. Part I: The void size function

Voids are promising cosmological probes. Nevertheless, every cosmological test based on voids must necessarily employ methods to identify them in redshift space. Therefore, redshift-space distortions (RSD) and the Alcock-Paczynski effect (AP) have an impact on the void identification process itself generating distortion patterns in observations. Using a spherical void finder, we developed a statistical and theoretical framework to describe physically the connection between the identification in real and redshift space. We found that redshift-space voids above the shot noise level have a unique real-space counterpart spanning the same region of space, they are systematically bigger and their centres are preferentially shifted along the line of sight. The expansion effect is a by-product of RSD induced by tracer dynamics at scales around the void radius, whereas the off-centring effect constitutes a different class of RSD induced at larger scales by the global dynamics of the whole region containing the void. The volume of voids is also altered by the fiducial cosmology assumed to measure distances, this is the AP change of volume. These three systematics have an impact on cosmological statistics. In this work, we focus on the void size function. We developed a theoretical framework to model these effects and tested it with a numerical simulation, recovering the statistical properties of the abundance of voids in real space. This description depends strongly on cosmology. Hence, we lay the foundations for improvements in current models of the abundance of voids in order to obtain unbiased cosmological constraints from redshift surveys.Fil: Correa, Carlos Mauricio. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba. Instituto de Astronomía Teórica y Experimental. Universidad Nacional de Córdoba. Observatorio Astronómico de Córdoba. Instituto de Astronomía Teórica y Experimental; ArgentinaFil: Paz, Dante Javier. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba. Instituto de Astronomía Teórica y Experimental. Universidad Nacional de Córdoba. Observatorio Astronómico de Córdoba. Instituto de Astronomía Teórica y Experimental; ArgentinaFil: Sánchez, Guillermo Ariel. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba. Instituto de Astronomía Teórica y Experimental. Universidad Nacional de Córdoba. Observatorio Astronómico de Córdoba. Instituto de Astronomía Teórica y Experimental; Argentina. Max-Planck-Institut für Extraterrestrische Physik; AlemaniaFil: Ruiz, Andrés Nicolás. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba. Instituto de Astronomía Teórica y Experimental. Universidad Nacional de Córdoba. Observatorio Astronómico de Córdoba. Instituto de Astronomía Teórica y Experimental; ArgentinaFil: Padilla, Nelson David. Pontificia Universidad Católica de Chile; Argentina. Universidad Nacional de Córdoba. Observatorio Astronómico de Córdoba; ArgentinaFil: Angulo, Raúl E.. Donostia International Physics Centre; Españ

Non-fiducial cosmological test from geometrical and dynamical distortions around voids

We present a new cosmological test using the distribution of galaxies around cosmic voids without assuming a fiducial cosmology. The test is based on a physical model for the void-galaxy cross-correlation function projected along and perpendicular to the line of sight. We treat correlations in terms of void-centric angular distances and redshift differences between void-galaxy pairs, hence it is not necessary to assume a fiducial cosmology. This model reproduces the coupled dynamical (Kaiser effect, RSD) and geometrical (Alcock-Paczynski effect, GD) distortions that affect the correlation measurements. It also takes into account the scale mixing due to the projection ranges in both directions. The model is general, so it can be applied to an arbitrary cylindrical binning scheme, not only in the case of the projected correlations. It primarily depends on two cosmological parameters: Ωm, the matter fraction of the Universe today (sensitive to GD), and β, the ratio between the growth rate factor of density perturbations and the tracer bias (sensitive to RSD). In the context of the new generation of galaxy spectroscopic surveys, we calibrated the test using the Millennium XXL simulation for different redshifts. The method successfully recovers the cosmological parameters. We studied the effect of measuring with different projection ranges, finding robust results up to wide ranges. The resulting data covariance matrices are relatively small, which reduces the noise in the Gaussian likelihood analysis and will allow the usage of a smaller number of mock catalogues. The performance evaluated in this work indicates that the developed method is a promising test to be applied on real data.Fil: Correa, Carlos Mauricio. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba. Instituto de Astronomía Teórica y Experimental. Universidad Nacional de Córdoba. Observatorio Astronómico de Córdoba. Instituto de Astronomía Teórica y Experimental; ArgentinaFil: Paz, Dante Javier. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba. Instituto de Astronomía Teórica y Experimental. Universidad Nacional de Córdoba. Observatorio Astronómico de Córdoba. Instituto de Astronomía Teórica y Experimental; ArgentinaFil: Padilla, Nelson David. Departamento de Astronomia y Astrofisica; ChileFil: Ruiz, Andrés Nicolás. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba. Instituto de Astronomía Teórica y Experimental. Universidad Nacional de Córdoba. Observatorio Astronómico de Córdoba. Instituto de Astronomía Teórica y Experimental; ArgentinaFil: Angulo, Raúl E.. Donostia International Physics Centre; EspañaFil: Sánchez, Ariel G.. Max Plank Institute For Extraterrestrial Physics; Alemani

Resources and consumption patterns of livestock in Carthago Spartaria during the Byzantine age

This work presents the results from the analysis of the bone material from the Byzantine harbor quarter overlapping the Roman theater of Carthago Spartaria (Cartagena, Murcia). From a broad sample of 2,723 fragments from debris pits and garbage dumps, the production strategies and the consuming patterns of the livestock are established during a historical period of the city in which its appearance has nothing to do with the monumental image of a Roman town. The use of mixed farming is established, with a predominance of caprine and bovine versus a scant presence of suids and equines, as well as wild hunted fauna. Most of the animals, with the exception of goats and pigs, as well as certain bovines, were sacrificed in full adulthood. This implies that both their secondary products and their draft force were used. Livestock managing is confirmed as an important economic activity, at a moment when agricultural exploitation of the environment undergoes substantial diminishing as judged from the disappearance of the vast majority of rural sites from preceding decades. The represented livestock and the herding and maintenance conditions contribute to provide a “rural-like” image of the old Hispanic capitalEste trabajo presenta los resultados del análisis arqueofaunístico del material óseo del barrio portuario de época bizantina superpuesto al teatro romano de Carthago Spartaria (Cartagena, Murcia). Sobre una amplia muestra de 2.723 piezas, procedentes de pozos de desecho y basureros, se determinan las estrategias productivas y los patrones de consumo de la cabaña ganadera de una fase histórica de la ciudad cuya fisonomía ya nada tiene que ver con la imagen monumental de la urbe romana. Se ha determinado el uso de una ganadería mixta, con un predominio de ovicaprinos y bovinos frente a una escasa presencia de suidos y équidos, así como de fauna cinegética. La mayoría de los animales, a excepción de las cabras y los cerdos, así como ciertos bovinos, fueron sacrificados en edad plenamente adulta, lo que implica que se aprovecharon tanto sus productos secundarios como su fuerza tractora. La ganadería se confirma como una importante actividad económica, en un momento en que la explotación agrícola del entorno sufre una considerable reducción a juzgar por la desaparición de la mayor parte de los establecimientos rurales de las décadas precedentes. La cabaña representada y las condiciones de cría y mantenimiento contribuyen a proporcionar una imagen “ruralizada” de la vieja capital hispan

Perfiles hormonales durante el ciclo estral de la oveja

La actividad reproductiva de la oveja está controlada por el fotoperiodo y por mecanismos de retroalimentación hormonal sobre el eje hipotálamo-hipófisis-ganada

Clustering and descendants of MUSYC galaxies at z<1.5

We measure the evolution of galaxy clustering out to a redshift of z~1.5 using data from two MUSYC fields, the Extended Hubble Deep Field South (EHDF-S) and the Extended Chandra Deep Field South (ECDF-S). We use photometric redshift information to calculate the projected-angular correlation function, omega(sigma), from which we infer the projected correlation function Xi(sigma). We demonstrate that this technique delivers accurate measurements of clustering even when large redshift measurement errors affect the data. To this aim we use two mock MUSYC fields extracted from a LambdaCDM simulation populated with GALFORM semi-analytic galaxies which allow us to assess the degree of accuracy of our estimates of Xi(sigma) and to identify and correct for systematic effects in our measurements. We study the evolution of clustering for volume limited subsamples of galaxies selected using their photometric redshifts and rest-frame r-band absolute magnitudes. We find that the real-space correlation length r_0 of bright galaxies, M_r<-21 (rest-frame) can be accurately recovered out to z~1.5, particularly for ECDF-S given its near-infrared photometric coverage. There is mild evidence for a luminosity dependent clustering in both fields at the low redshift samples (up to =0.57), where the correlation length is higher for brighter galaxies by up to 1Mpc/h between median rest-frame r-band absolute magnitudes of -18 to -21.5. As a result of the photometric redshift measurement, each galaxy is assigned a best-fit template; we restrict to E and E+20%Sbc types to construct subsamples of early type galaxies (ETGs). Our ETG samples show a strong increase in r_0 as the redshift increases, making it unlikely (95% level) that ETGs at median redshift z_med=1.15 are the direct progenitors of ETGs at z_med=0.37 with equivalent passively evolved luminosities. (ABRIDGED)Comment: 16 pages, 12 figures, 2 tables, accepted for publication in MNRA

The PAU survey: Ly α intensity mapping forecast

In this work, we explore the application of intensity mapping to detect extended Ly$\alpha$ emission from the IGM via cross-correlation of PAUS images with Ly$\alpha$ forest data from eBOSS and DESI. Seven narrow-band (FWHM=13nm) PAUS filters have been considered, ranging from 455 to 515 nm in steps of 10 nm, which allows the observation of Ly$\alpha$ emission in a range $2.7<z<3.3$. The cross-correlation is simulated first in an area of 100 deg$^2$ (PAUS projected coverage), and second in two hypothetical scenarios: a deeper PAUS (complete up to $i_{\rm AB}<24$ instead of $i_{\rm AB}<23$, observation time x6), and an extended PAUS coverage of 225 deg$^2$ (observation time x2.25). A hydrodynamic simulation of size 400 Mpc/h is used to simulate both extended Ly$\alpha$ emission and absorption, while the foregrounds in PAUS images have been simulated using a lightcone mock catalogue. Using an optimistic estimation of uncorrelated PAUS noise, the total probability of a non-spurious detection is estimated to be 1.8\% and 4.5\% for PAUS-eBOSS and PAUS-DESI , from a run of 1000 simulated cross-correlations with different realisations of instrumental noise and quasar positions. The hypothetical PAUS scenarios increase this probability to 15.3\% (deeper PAUS) and 9.0\% (extended PAUS). With realistic correlated noise directly measured from PAUS images, these probabilities become negligible. Despite these negative results, some evidences suggest that this methodology may be more suitable to broad-band surveys.Comment: 18 pages, 14 figures, 6 tables. Accepted in MNRA

Deconstruyendo al inmigrante latinoamericano: las políticas migratorias ibéricas como tecnologías neocoloniales

Resumen Las migraciones latinoamericanas hacia la Península Ibérica han experimentado un fuerte crecimiento durante las dos últimas décadas. En este contexto, los estados español y portugués han implementado políticas que construyen al inmigrante latinoamericano como un extranjero excepcional, subrayando una supuesta compatibilidad cultural como garantía de una mejor integración social en la sociedad receptora. El tratamiento político y legal diferenciado hacia esta población entronca así con un discurso que enfatiza la importancia de los vínculos históricos y culturales que unen a Latinoamérica y a la Península Ibérica desde hace cinco siglos. Partiendo de las teorías decoloniales, este trabajo aborda de manera comparada la evolución de este discurso político-legal en España y Portugal a lo largo de los últimos veinte años, prestando especial atención tanto a sus manifestaciones concretas en leyes y políticas públicas como a los distintos momentos en que ha sido adoptado, mantenido y abandonado en función de las circunstancias