VISIR-VLT Images of the Water Maser Emitting Planetary Nebula K 3-35

K3-35 is an extremely young bipolar planetary nebula that contains a precessing bipolar jet and a small (radius 80 AU) water maser equatorial ring. We have obtained VISIR- VLT images of K 3-35 in the PAH1 ({\lambda}=8.6 {\mu}m), [S iv] ({\lambda}=10.6 {\mu}m), and SiC ({\lambda}=11.85 {\mu}m) filters to analize the mid-IR morphology and the temperature structure of its dust emission. The images show the innermost nebular regions undetected at optical wavelegths and the precessing bipolar jets. The temperature map shows variations in the temperature in the equatorial zone and in regions associated to its jets.Comment: 2 pages, 2 figures, 283 IAU Symp. Planetary Nebulae an Eye to the Futur

Mesa redonda: La Estadística en la Investigación Médica

Este artículo es una transcripción de las conferencias dictadas en la mesa organizada en el 4º Congreso Galego de Estatistica y Investigación de Operacions que tuvo lugar en Santiago de Compostela en noviembre de 1999. Los autores discuten sobre el posible uso o abuso de la estadística en artículos científicos, sobre lo que se necesitaría para alcanzar la interdisciplinariedad y lo que se entiende por éxito profesional. Se define la disciplina (bioestadística) y se identifica a sus profesionales (bioestadísticos). Se discute sobre el papel de un bioestadístico en un equipo de investigación médico y se repasan las dificultades que tienen los médicos para realizar estudios clínico-epidemiológicos

Metamorphic inversion in the famatinian orogen, Sierra de San Luis, Argentina

P-T conditions of Famatinian metamorphism (c. 465 Ma) were determined along a cross section in the central southern part of the Sierras de San Luis, Eastern Sierras Pampeanas. A continuity from low to high grade metamorphism is recorded here with an inverted disposition of metamorphic zones, i.e., higher grade rocks structurally overlying lower grade rocks. Foliation dip decreases accordingly downward in a fan-like arrangement. Shear zones are boundaries to the main metamorphic zones. The cross section is located on the eastern side of a large scale transpressional double vergence positive flower structure which involves most of the Sierra de San Luis. Calculated peak P-T values are: 790º and 800ºC and 7.2 to 8.9 kbar for the gneiss zone, 600º to 650ºC and 5.9 to 6.4 kbar for schist zone, and 550 ºC and 4.7 kbar for the transition schist – phyllite zone. Highest grade rocks show a clockwise P-T path with a nearly isothermal decompression to P values which are similar within error to those of the lower grade rocks. The latter suggests that metamorphic inversion was largely synmetamorphic and that it was driven by movement along shear zones and ductile flow within domains. Reactivation of shear zones is invoked however to explain some mistmach of P values particularly among the lower grade zone

Seismology of beta Cephei stars: differentially-rotating models for interpreting the oscillation spectrum of nu-Eridani

A method for the asteroseismic analysis of beta Cephei stars is presented and applied to the star nu Eridani. The method is based on the analysis of rotational splittings, and their asymmetries using differentially-rotating asteroseismic models. Models with masses around 7.13 M_sun, and ages around 14.9 Myr, were found to fit better 10 of the 14 observed frequencies, which were identified as the fundamental radial mode and the three L=1 triplets g, p, and p. The splittings and aymmetries found for these modes recover those provided in the literature, except for p. For this last mode, all its non-axysimmetric components are predicted by the models. Moreover, opposite signs of the observed and predicted splitting asymmetries are found. If identification is confirmed, this can be a very interesting source of information about the internal rotation profile, in particular in the outer regions of the star. In general, the seismic models which include a description for shellular rotation yield slightly better results as compared with those given by uniformly-rotating models. Furthermore, we show that asymmetries are quite dependent on the overshooting of the convective core, which make the present technique suitable for testing the theories describing the angular momentum redistribution and chemical mixing due to rotationally-induced turbulence.Comment: 11 pages, 9 figures, 8 tables. ApJ (in press

A MAUT approach for reusing ontologies

Knowledge resource reuse has become a popular approach within the ontology engineering field, mainly because it can speed up the ontology development process, saving time and money and promoting the application of good practices. The NeOn Methodology provides guidelines for reuse. These guidelines include the selection of the most appropriate knowledge resources for reuse in ontology development. This is a complex decision-making problem where different conflicting objectives, like the reuse cost, understandability, integration workload and reliability, have to be taken into account simultaneously. GMAA is a PC-based decision support system based on an additive multi-attribute utility model that is intended to allay the operational difficulties involved in the Decision Analysis methodology. The paper illustrates how it can be applied to select multimedia ontologies for reuse to develop a new ontology in the multimedia domain. It also demonstrates that the sensitivity analyses provided by GMAA are useful tools for making a final recommendation

A Maut aprroach for reusing domain ontologies on the basis of the NeOn Methodlogy

Knowledge resource reuse has become a popular approach within the ontology engineering field, mainly because it can speed up the ontology development process, saving time and money and promoting the application of good practices. The NeOn Methodology provides guidelines for reuse. These guidelines include the selection of the most appropriate knowledge resources for reuse in ontology development. This is a complex decision-making problem where different conflicting objectives, like the reuse cost, understandability, integration workload and reliability, have to be taken into account simultaneously. GMAA is a PC-based decision support system based on an additive multi-attribute utility model that is intended to allay the operational difficulties involved in the Decision Analysis methodology. The paper illustrates how it can be applied to select multimedia ontologies for reuse to develop a new ontology in the multimedia domain. It also demonstrates that the sensitivity analyses provided by GMAA are useful tools for making a final recommendation

International evidence of tax evasion and money laundering through tax havens

Los efectos perjudiciales de los paraísos fiscales en la sociedad civil comenzaron a ser percibidos en el año 2000, cuando una organización británica, OXFAM, publicó un informe que sugería que estas jurisdicciones les costaban a los países en desarrollo, al menos, cincuenta mil millones de dólares anuales en ingresos perdidos. El objetivo de este estudio es investigar, analizar y evidenciar la vinculación de los paraísos fiscales con la evasión fiscal, la corrupción y el blanqueo de capitales a nivel internacional y sus implicaciones sobre la “justicia fiscal”. La metodología utilizada es empírica y teórica, apoyándose en el estudio de casos y análisis de los documentos presentados y publicados por diversas fuentes. Entre las conclusiones destaca la eficacia de las denuncias y filtraciones que se han producido entre 2007 y 2021 como instrumento ilustrador del funcionamiento de la trama de corrupción fiscal internacional de grandes fortunas o de empresas, relacionadas con paraísos fiscales y que ha posibilitado la apertura de expedientes e investigaciones precisas desde las administraciones públicas nacionales. Los Panama Papers (2016 y 2018) y los Pandora Papers (2021) destacan como las filtraciones más relevantes.The detrimental effects of tax havens on civil society first came to light in 2000 when the British organization OXFAM published a report suggesting that these jurisdictions cost developing countries at least fifty billion dollars a year in lost revenue. The aim of this study is to investigate, analyze and provide evidence for the link between tax havens and international tax evasion, corruption and money laundering, and their implications for ‘tax justice’. The methodology used is empirical and theoretical, based on case studies and analysis of documents presented and published by various sources. The conclusions highlight the effectiveness of reports and leaks that have occurred between 2007 and 2021, which have exposed the functioning of international tax corruption schemes of large fortunes or companies related to tax havens and have made it possible to open files and institute precise investigations by national public administrations. The 2016 Panama Papers and the 2021 Pandora Papers stand out as the most relevant leaks

Unveiling the power spectra of δ\delta Scuti stars with TESS. The temperature, gravity, and frequency scaling relation

Thanks to high-precision photometric data legacy from space telescopes like CoRoT and Kepler, the scientific community could detect and characterize the power spectra of hundreds of thousands of stars. Using the scaling relations, it is possible to estimate masses and radii for solar-type pulsators. However, these stars are not the only kind of stellar objects that follow these rules: $\delta$ Scuti stars seem to be characterized with seismic indexes such as the large separation ($\Delta\nu$). Thanks to long-duration high-cadence TESS light curves, we analysed more than two thousand of this kind of classical pulsators. In that way, we propose the frequency at maximum power ($\nu_{\rm max}$) as a proper seismic index since it is directly related with the intrinsic temperature, mass and radius of the star. This parameter seems not to be affected by rotation, inclination, extinction or resonances, with the exception of the evolution of the stellar parameters. Furthermore, we can constrain rotation and inclination using the departure of temperature produced by the gravity-darkening effect. This is especially feasible for fast rotators as most of $\delta$ Scuti stars seem to be.Comment: 12 pages, 13 figures, accepted in Astronomy & Astrophysic

Determination of puberty in gilts: contrast of diagnostic methods

Background Early onset of a gilt´s puberty is needed for adequate economic performance in farms, because it indicates her reproductive performance and longevity. Therefore, an effective diagnosis is needed. Our purpose was to compare different procedures (external characteristics, blood progesterone analysis and ultrasonography diagnosis) to detect puberty in 70 gilts (Topigs TN70; 240 days old) on farm conditions. Postmortem examination was the standard reference. Multiple logistic regression analysis was used to identify which combination of independent variables (predictors) best predicts the status of gilts. Results Puberty (46/70 gilts; 65.71%) was characterized by the presence of follicles larger than 6 mm, corpus albicans, corpus rubrum, and corpus luteum (postmortem examination). Vaginal length, body condition, backfat, carcass weight and progesterone blood concentration were significantly higher in pubertal than prepubertal gilts (P < 0.05). Two types of ultrasonography equipment (DELTA and W3) were compared and performed by the same senior technician (V1). The results obtained by two technicians with different levels of experience (V1 and V2, a junior technician) using W3 were also compared. Ultrasonography provided better results than other diagnostic techniques, although the effectiveness of the ultrasonography changed with technological improvements and with increased expertise of technicians. The most accurate results were found by V1/DELTA (Nagelkerke´s R2 = 0.846; Sensitivity = 0.956; Specificity = 0.958; Positive predictive value = 0.978; Negative predictive value = 0.920; Area under ROC curve = 0.957). Results using the W3 equipment could be improved when used in conjunction with vaginal length (V1; Nagelkerke´s R2 = 0.834; Sensitivity = 0.933; Specificity = 0.958; Positive predictive value = 0.977; Negative predictive value = 0.885; Area under ROC curve = 0.972) or progesterone concentration (V2; Nagelkerke´s R2 = 0.780; Sensitivity = 0.955; Specificity = 0.826; Positive predictive value = 0.915; Negative predictive value = 0.905; Area under ROC curve = 0.970). Conclusions Ultrasonography provided better results than other diagnostic techniques. The effectiveness of the ultrasonography changes with technological improvements and with increased expertise of technicians. Results using the W3 equipment could be improved when used along with vaginal length (V1) or progesterone concentration (V2). Accuracy parameters are a guide to choose puberty diagnosis, but the farms must also evaluate effect on gilts, ease and cost of administration