Some records of wood-inhabiting fungi on Fagus sylvatica in northern Spain

Es presenta una llista d'algunes recol·leccions interessants de macromicets sobre Fagus, fetes en algunes prospeccions a Astúries i Navarra, en novembre de 2005 . Pel cap baix, Antrodiella fissiliformis, Nemania carbonacea y Phellinus cavicola representen les primeres citacions per a l 'estat espanyol. Des del punt de vista de l' interès per a la conservació de la biodiversitat fúngica, les reserves integrals de Lizardoia i Aztaparreta, a Navarra, es consideren d'especial importància per a la conservació dels fongs saproxílics fagícoles del sud-oest d'Europa. Aquest treball vol estimular també l 'estudi continuat dels fongs lignícoles a les fagedes de l 'estat espanyol.Se presenta una lista de algunos allaazgos interesantes de macromicetes lignícolas sobre Fagus, realizados durante las prospecciones en Asturias y Navarra, en noviembre de 2005. Por lo menos Antrodiella fissiliformis, Nemania carbonacea y Phellinus cavicola representan primeras citas para España. desde una prespectiva de la conservación de la biodiversidad fúngica, las reservas integrales de L izardoia i Aztaparreta, en Navarra, se consideran de especial importancia para la conservación de los hongos saproxílicos fagícolas en el sudoeste de Europa. Este trabajo esta orientado también a fomentar el estudio continuado de los hongos lignícolas en los hayedos de España.A list is given of some interesting records of lignicolous macrofungi found on Fagus during some excursions in Asturias and Navarra in November 2005 . At least Antrodiella fissiliformis, Nemania carbonacea and Phellinus cavicola represent frrst records for the country. In a conservation perspective, the strict forest reserves Lizardoia and Aztaparreta in Navarra are considered to be important for the conservation of saproxylic fungi on beech in south western Europe. It is our hope that the paper will inspire to continued studies of wood-inhabiting fungi in beech forests in Spain

Some records of wood-inhabiting fungi on Fagus sylvatica in northern Spain

Es presenta una llista d'algunes recol·leccions interessants de macromicets sobre Fagus, fetes en algunes prospeccions a Astúries i Navarra, en novembre de 2005 . Pel cap baix, Antrodiella fissiliformis, Nemania carbonacea y Phellinus cavicola representen les primeres citacions per a l 'estat espanyol. Des del punt de vista de l' interès per a la conservació de la biodiversitat fúngica, les reserves integrals de Lizardoia i Aztaparreta, a Navarra, es consideren d'especial importància per a la conservació dels fongs saproxílics fagícoles del sud-oest d'Europa. Aquest treball vol estimular també l 'estudi continuat dels fongs lignícoles a les fagedes de l 'estat espanyol.A list is given of some interesting records of lignicolous macrofungi found on Fagus during some excursions in Asturias and Navarra in November 2005 . At least Antrodiella fissiliformis, Nemania carbonacea and Phellinus cavicola represent frrst records for the country. In a conservation perspective, the strict forest reserves Lizardoia and Aztaparreta in Navarra are considered to be important for the conservation of saproxylic fungi on beech in south western Europe. It is our hope that the paper will inspire to continued studies of wood-inhabiting fungi in beech forests in Spain.Se presenta una lista de algunos allaazgos interesantes de macromicetes lignícolas sobre Fagus, realizados durante las prospecciones en Asturias y Navarra, en noviembre de 2005. Por lo menos Antrodiella fissiliformis, Nemania carbonacea y Phellinus cavicola representan primeras citas para España. desde una prespectiva de la conservación de la biodiversidad fúngica, las reservas integrales de L izardoia i Aztaparreta, en Navarra, se consideran de especial importancia para la conservación de los hongos saproxílicos fagícolas en el sudoeste de Europa. Este trabajo esta orientado también a fomentar el estudio continuado de los hongos lignícolas en los hayedos de España

Absolute dimensions of solar-type eclipsing binaries. EF Aquarii: a G0 test for stellar evolution models

Recent studies have shown that stellar chromospheric activity, and its effect on convective energy transport in the envelope, is most likely the cause of significant radius and temperature discrepancies between theoretical evolution models and observations. We aim to determine absolute dimensions and abundances for the solar-type detached eclipsing binary EF Aqr, and to perform a detailed comparison with results from recent stellar evolutionary models. uvby-beta standard photometry was obtained with the Stromgren Automatic Telescope. The broadening function formalism was applied on spectra observed with HERMES at the Mercator telescope in La Palma, to obtain radial velocity curves. Masses and radii with a precision of 0.6% and 1.0% respectively have been established for both components of EF Aqr. The active 0.956 M_sol secondary shows star spots and strong Ca II H and K emission lines. The 1.224 M_sol primary shows signs of activity as well, but at a lower level. An [Fe/H] abundance of 0.00+-0.10 is derived with similar abundances for Si, Ca, Sc, Ti, V, Cr, Co, and Ni. Solar calibrated evolutionary models such as Yonsei-Yale, Victoria-Regina and BaSTI isochrones and evolutionary tracks are unable to reproduce EF Aqr, especially for the secondary, which is 9% larger and 400 K cooler than predicted. Models adopting significantly lower mixing length parameters l/H_p remove these discrepancies, as seen in other solar type binaries. For the observed metallicity, Granada models with a mixing length of l/H_p=1.30 (primary) and 1.05 (secondary) reproduce both components at a common age of 1.5+-0.6 Gyr. Observations of EF Aqr suggests that magnetic activity, and its effect on envelope convection, is likely to be the cause of discrepancies in both radius and temperature, which can be removed by adjusting the mixing length parameter of the models downwards.Comment: 11 pages, 8 figures, accepted for publication by A&

Age and helium content of the open cluster NGC 6791 from multiple eclipsing binary members. I. Measurements, methods, and first results

Earlier measurements of the masses and radii of the detached eclipsing binary V20 in the open cluster NGC 6791 were accurate enough to demonstrate that there are significant differences between current stellar models. Here we improve on those results and add measurements of two additional detached eclipsing binaries, the cluster members V18 and V80. The enlarged sample sets much tighter constraints on the properties of stellar models than has hitherto been possible, thereby improving both the accuracy and precision of the cluster age. We employed (i) high-resolution UVES spectroscopy of V18, V20 and V80 to determine their spectroscopic effective temperatures, [Fe/H] values, and spectroscopic orbital elements, and (ii) time-series photometry from the Nordic Optical Telescope to obtain the photometric elements. The masses and radii of the V18 and V20 components are found to high accuracy, with errors on the masses in the range 0.27-0.36% and errors on the radii in the range 0.61-0.92%. V80 is found to be magnetically active, and more observations are needed to determine its parameters accurately. The metallicity of NGC 6791 is measured from disentangled spectra of the binaries and a few single stars to be [Fe/H]= +0.29 \pm 0.03 (random) \pm 0.07 (systematic). The cluster reddening and apparent distance modulus are found to be E(B - V) = 0.160 \pm 0.025 and (m - M)V = 13.51 \pm 0.06 . A first model comparison shows that we can constrain the helium content of the NGC 6791 stars, and thus reach a more accurate age than previously possible. It may be possible to constrain additional parameters, in particular the C, N, and O abundances. This will be investigated in paper II.Comment: Accepted for publication in A&

Multi-site H-bridge breathers in a DNA--shaped double strand

We investigate the formation process of nonlinear vibrational modes representing broad H-bridge multi--site breathers in a DNA--shaped double strand. Within a network model of the double helix we take individual motions of the bases within the base pair plane into account. The resulting H-bridge deformations may be asymmetric with respect to the helix axis. Furthermore the covalent bonds may be deformed distinctly in the two backbone strands. Unlike other authors that add different extra terms we limit the interaction to the hydrogen bonds within each base pair and the covalent bonds along each strand. In this way we intend to make apparent the effect of the characteristic helicoidal structure of DNA. We study the energy exchange processes related with the relaxation dynamics from a non-equilibrium conformation. It is demonstrated that the twist-opening relaxation dynamics of a radially distorted double helix attains an equilibrium regime characterized by a multi-site H-bridge breather.Comment: 27 pages and 10 figure

INTERIM REPORT IMPROVED METHODS FOR INCORPORATING RISK IN DECISION MAKING

This paper reports observations and preliminary investigations in the first phase of a research program covering methodologies for making safety-related decisions. The objective has been to gain insight into NRC perceptions of the value of formal decision methods, their possible applications, and how risk is, or may be, incorporated in decision making. The perception of formal decision making techniques, held by various decision makers, and what may be done to improve them, were explored through interviews with NRC staff. An initial survey of decision making methods, an assessment of the applicability of formal methods vis-a-vis the available information, and a review of methods of incorporating risk and uncertainty have also been conducted

Self-reported sickness absence and presenteeism as predictors of future disability pension: Cohort study with 11-year register follow-up

Many healthcare workers in eldercare are pushed out of the labor market before the official retirement age due to poor health. Identification of early warnings signs is important to avoid complete loss of work ability. The aim of this study was to investigate to what degree sickness absence and presenteeism increase future risk for disability pension among eldercare workers. A total of 8952 Danish female eldercare workers responded to a survey about work environment and health. They were followed for 11 years in the Danish Register for Evaluation of Marginalization, with time-to-event analyses estimating the hazard ratios (HRs) for disability pension from sickness absence and presenteeism at baseline. Analyses were adjusted for age, education, body mass index, leisure-time physical activity, smoking, physical exertion at work, and psychosocial factors related to the work environment. During the 11-year follow-up, 11.9% participants received disability pension. For the whole cohort, the highest risk for disability pension was observed for the category of >30 days of combined sickness absence and presenteeism at baseline in the fully adjusted model (HR = 7.93 [95%CI 5.20–12.09]). Eldercare workers aged >45 years were at a higher risk for disability pension in all included categories. Sickness absence and presenteeism increased the risk of disability pension among female eldercare workers. These results suggest that organizations would benefit from identifying early warning signs among workers in the prevention of involuntary early retirement. © 2021 Elsevier Inc

Production of superpositions of coherent states in traveling optical fields with inefficient photon detection

We develop an all-optical scheme to generate superpositions of macroscopically distinguishable coherent states in traveling optical fields. It non-deterministically distills coherent state superpositions (CSSs) with large amplitudes out of CSSs with small amplitudes using inefficient photon detection. The small CSSs required to produce CSSs with larger amplitudes are extremely well approximated by squeezed single photons. We discuss some remarkable features of this scheme: it effectively purifies mixed initial states emitted from inefficient single photon sources and boosts negativity of Wigner functions of quantum states.Comment: 13 pages, 9 figures, to be published in Phys. Rev.

Microstructural strain energy of α-uranium determined by calorimetry and neutron diffractometry

The microstructural contribution to the heat capacity of α-uranium was determined by measuring the heat-capacity difference between polycrystalline and single-crystal samples from 77 to 320 K. When cooled to 77 K and then heated to about 280 K, the uranium microstructure released (3±1) J/mol of strain energy. On further heating to 300 K, the microstructure absorbed energy as it began to redevelop microstrains. Anisotropic strain-broadening parameters were extracted from neutron-diffraction measurements on polycrystals. Combining the strain-broadening parameters with anisotropic elastic constants from the literature, the microstructural strain energy is predicted in the two limiting cases of statistically isotropic stress and statistically isotropic strain. The result calculated in the limit of statistically isotropic stress was (3.7±0.5) J/mol K at 77 K and (1±0.5) J/mol at room temperature. In the limit of statistically isotropic strain, the values were (7.8±0.5) J/mol K at 77 K and (4.5±0.5) J/mol at room temperature. In both cases the changes in the microstructural strain energy showed good agreement with the calorimetry