Are truncated stellar disks linked to the molecular gas density?

We know that the slope of the radial, stellar light distribution in galaxies is well described by an exponential decline and this distribution is often truncated at a break radius ($R_{br}$). We don't have a clear understanding for the origin of these outer truncations and several hypotheses have been proposed to explain them. We want to test the various theories with direct observations of the cold molecular gas for a few truncated galaxies in comparison with the non-truncated ones. The answer to the existence of a possible link between truncated stellar disks and the molecular gas density cannot be obtained from CO maps in the literature, because so far there are no galaxies with a clear truncation observed in CO at high resolution.Comment: 3 pages, 6 figures, to appear in Astrophysics and Space Science (Apss), special issue of "Science with ALMA: a new era for Astrophysics" conference, ed. Dr. Bachille

Random Young towers and quenched decay of correlations for predominantly expanding multimodal circle maps

In this paper, we study the random dynamical system $f_\omega^n$ generated by a family of maps $\{f_{\omega_0}: \mathbb S^1 \to \mathbb S^1\}_{\omega \in [-\varepsilon,\varepsilon]},$ $f_{\omega_0}(x) = \alpha \xi (x+\omega_0) +a\ (\mathrm{mod }\ 1),$where$\xi: \mathbb S^1 \to \mathbb R$is a non-degenerated map,$a\in \mathbb S^1$,$\alpha,\varepsilon>0$. Fixing a constant$c\in (0,1)$, we show that for$\alpha$sufficiently large and$\varepsilon > \alpha^{-1+c},$the random dynamical system$f_\omega^n$ presents a random Young tower structure and quenched decay of correlations.Comment: 38 pages, 0 figure

Evidence that chronic hypoxia causes reversible impairment on male fertility

Aim: To evaluate the effect of chronic hypoxia on human spermatogenic parameters and their recovery time. Methods: Seminological parameters of six male healthy mountain trekkers were evaluated in normoxia at sea level. After 26 days exposure to altitude (ranging from 2 000 m to 5 600 m, Karakorum Expedition) the same parameters were again evaluated after returning to sea level. These parameters were once again evaluated after 1 month and then again after 6 months. Results: Sperm count was found to be lower immediately after returning to sea level (P = 0.0004) and again after a month (P = 0.0008). Normal levels were reached after 6 months. Spermatic motility (%) shows no reduction immediately after returning to sea level (P = 0.0583), whereas after 1 month this reduction was significant (P = 0.0066). After 6 months there was a recovery to pre-hypoxic exposure values. Abnormal or immature spermatozoa (%) increased immediately after returning to sea level (P = 0.0067) and then again after 1 month (P = 0.0004). After 6 months there was a complete recovery to initial values. The total number of motile sperm in the ejaculate was found to be lower immediately after returning to sea level (P = 0.0024) and then again after 1 month (P = 0.0021). After 6 months there was a recovery to pre-hypoxic exposure values. Conclusion: Chronic hypoxia induces a state of oligospermia and the normalization of such seminological parameters at the restoration of previous normoxic conditions after 6 months indicate the influence of oxygen supply in physiological mechanisms of spermatogenesis and male fertility. (Asian J Androl 2008 Jul; 10: 602–606

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The immunoprevention measures (vaccination by schedule plus mass campaigns) to achieve the objectives subscribed by PAHO/WHO produced around the year 2000 a sharp drop in cases of rubella and measles in Argentina. For this reason, there is currently a young population that only has immunity through the vaccine. Objective: Given the latent risk of reintroduction of these viruses in the country, we set out to investigate the presence of anti-rubella and anti-measles IgG antibodies in people aged 7 to 19 years who, according to the National Immunization Calendar and data from the National Surveillance Program, they should have two doses of triple viral vaccine and should not have had contact with the virus naturally. A retrospective, descriptive cross-sectional study was conducted. 180 samples from people between 7 and 19 years of age who attended the Fundación para el Progreso de la Medicina de Córdoba (FPM) for routine biochemical analyzes between the months of September 2021 and February 2022 were processed. rubella was determined by CMIA (ABBOTT) (FPM) while indirect immunofluorescence was performed for measles IgG at the Reina Fabiola University Clinic. The seroprevalences found were 88.3% and 92.2% for measles and rubella, respectively. There were no significant differences between antibody concentrations by age subgroup (rubella p=0.1435, measles p=0.1049), but the antibody concentration among women was significantly higher than among men (rubella p=0.036, measles p=0.031). Among women, anti-rubella IgG was higher in the younger age subgroup (p=0.0196), but not for measles (p=0.1874) nor among age subgroups of men (rubella p=0.7445, measles p=0.1236). The seroprevalences detected reach the coverage objective recommended by the WHO to prevent the circulation of rubella, but not the measles virus. These results show the need to sustain efforts to keep the prevalence of antibodies generated by vaccination high, also knowing that during the pandemic their application decreased, increasing the risk of virus reintroduction into the country.Las medidas de inmunoprevención (vacunación por calendario más campañas masivas) para lograr los objetivos suscriptos de la OPS/OMS produjeron hacia el año 2000 una caída abrupta de casos de rubéola y sarampión en Argentina. Por este motivo, actualmente existe una población joven que sólo tiene inmunidad a través de la vacuna. Objetivo: ante el riesgo latente de reintroducción de estos virus en el país, nos propusimos investigar la presencia de anticuerpos IgG anti-rubéola y antisarampión en personas de 7 a 19 años de edad que, de acuerdo al Calendario Nacional de Inmunizaciones y los datos del Programa Nacional de Vigilancia, deberían tener dos dosis de vacuna triple viral y no deberían haber tenido contacto con el virus de manera natural. Se realizó un estudio retrospectivo, descriptivo transversal. Se procesaron 180 muestras de personas de entre 7 y 19 años de edad que concurrieron a realizarse análisis bioquímicos de rutina a la Fundación para el Progreso de la Medicina de Córdoba (FPM) entre los meses de septiembre de 2021 y febrero de 2022. La IgG rubéola se determinó por CMIA (ABBOTT) (FPM) mientras que para IgG sarampión se realizó inmunofluorescencia indirecta en la Clínica Universitaria Reina Fabiola. Las seroprevalencias encontradas fueron del 88.3% y 92.2% para sarampión y rubéola respectivamente. No hubo diferencias significativas entre concentraciones de anticuerpos por subgrupo etario (rubéola p=0.1435, sarampión p=0.1049), pero la concentración de anticuerpos entre mujeres fue significativamente mayor que entre hombres (rubéola p=0.036, sarampión p=0.031). Entre mujeres la IgG anti-rubéola fue mayor en el subgrupo etario de menor edad (p=0.0196), no así para sarampión (p=0.1874) ni entre subgrupos etarios de hombres (rubéola p=0.7445, sarampión p=0.1236). Las seroprevalencias detectadas alcanzan el objetivo de cobertura recomendado por la OMS para impedir la circulación de rubéola, no así de virus sarampión. Estos resultados evidencian la necesidad de sostener los esfuerzos para mantener elevadas las prevalencias de anticuerpos generados por la vacunación, sabiendo además que durante la pandemia bajó la aplicación de las mismas, aumentando el riesgo de reintroducción de los virus en el país.

APHRODITE: Design and Preliminary Tests of an Autonomous and Reusable Photo-sensing Device for Immunological Test aboard the International Space Station

Preliminary results of the design and manufacturing of APHRODITE, a compact and versatile device for carrying out analyses of biological fluids during space missions that will be used as a technological demonstrator on board the International Space Station (ISS) for the quantitative determination of salivary biomarkers indicators of alterations of functionality of the immune system. The paper addresses the design of the main subsystems of the analytical device and the preliminary results obtained during the first implementations of the device subsystems and testing measurements. In particular, the system design and the experiment data output of the lab-on-chip photosensors and of the front-end readout electronics are reported in detail

Pre-cooling for endurance exercise performance in the heat: a systematic review.

PMCID: PMC3568721The electronic version of this article is the complete one and can be found online at: http://www.biomedcentral.com/1741-7015/10/166. This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/2.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.Endurance exercise capacity diminishes under hot environmental conditions. Time to exhaustion can be increased by lowering body temperature prior to exercise (pre-cooling). This systematic literature review synthesizes the current findings of the effects of pre-cooling on endurance exercise performance, providing guidance for clinical practice and further research

Determinación y evaluación de competencias asociadas a la actividad experimental

Las competencias son sistemas de reflexión-acción que han de poder transferirse de manera creativa a diferentes contextos, situaciones y problemas. Dan la posibilidad de desenvolverse en situaciones complejas en un contexto determinado, resultado de la integración, movilización y adecuación de capacidades, conocimientos, actitudes y valores. Esta complejidad ha de ser reconocida expresamente en el proceso de aprendizaje para que la propuesta pedagógica incluya las actividades que posibiliten el desarrollo de competencias. Ello conlleva la reflexión acerca del rol docente y de las estrategias didácticas necesarias para trabajar en un proceso de enseñanza de tales características. Se describe en este trabajo lo realizado en el marco del proyecto Polimodal: desafíos alrededor de competencias experimentales, en el cual se llevó a cabo la elaboración de un modelo propio de competencias asociadas a la actividad experimental y se desarrolló un instrumento para el seguimiento del desarrollo de los componentes de las competencias que se ponen en juego durante el trabajo experimental. En el marco del mencionado Proyecto, un grupo de docentes de Enseñanza Secundaria y de Universidad trabajaron conjuntamente en el análisis, discusión y búsqueda de consenso, entre actores de los dos niveles educativos, acerca de la idea de competencias y de cómo evaluar el aprendizaje de los estudiantes en este marco. Ello sirvió para revalorizar la importancia del trabajo experimental en el aprendizaje de las ciencias y en el desarrollo de competencias y podría constituirse en una estrategia válida para facilitar el tránsito de los alumnos entre ambos niveles

Arguing with experts: strategies in children with Asperger

La descripción de las habilidades lingüísticas de los niños condición Asperger (CA) da cuenta de que sus discursos poseen solidez gramatical y denotan el dominio precoz de ciertos usos léxicos complejos. No obstante, experimentan dificultades lingüísticas para identificar y asignar estados mentales a otros. Así, muchos de sus usos comunicativos se tornan falentes, especialmente aquellos que implican articular o comprender usos comunicativos estratégicos. En este trabajo, caracterizamos los usos argumentativos de niños CA en instancias de interacción con un adulto, comparando estas secuencias con las de pares neurotípicos (NT). Se analiza la disposición de secuencias polémicas y el uso de dos tipos de conectores (‘pero’ y ‘porque’). El objetivo es comprender las estrategias argumentativas dispuestas en términos dinámicos considerando especialmente si los niños CA atienden a los argumentos que les ofrecen sus oponentes. Los resultados indican que los niños CA son más reacios que los NT a polemizar sobre tópicos que están fuera de su interés y que sus enunciados presentan más encadenamientos de carácter inferencial. En cuanto a los usos de los conectores, se observó que los niños CA los utilizan con más frecuencia que los niños NT. Predominan los usos en posición inicial e intermedia (vinculando cláusulas), lo que indicaría su uso adecuado como operadores de encadenamiento argumentativo. Por otro lado, resulta predominante el uso del conector de co-orientación (‘porque’) en posición intermedia. Los usos de ‘pero’ (conector de anti-orientación) son menos frecuentes, aunque el análisis cualitativo permite observar que su uso introduce una mayor variedad de funciones pragmáticas.The description of linguistic skills in children with Asperger condition (AC) reports that their speech shows a broad grammatical knowledge that reveals an earlier mastering of complex lexical resources. Nevertheless AC children face some difficulties when they have to linguistically identify and assign mental states to others. These problems turn unsatisfactories somo of their communicative, mainly those that require articulate or understanding communicative strategic uses. In this work we characterize the AC argumentative uses in conversational settings with an adult, comparing these sequences with those produced by Neurotypical children (NT), paired with AC children in Age and Social level. We analyze the polemic sequences and the use of two types of grammatical connectors (‘but’ and ‘because’). The aim is to understand the argumentative strategies used by children in a dynamic perspective, considering if AC children can cope with the arguments presented by their opponents.The results show that AC children are more reluctant to argue over topics that were out of their focus of interests and, also, their utterances, in a great amount of uses, show more inferential chaining than the NT’s utterances. If we take into account the grammatical connectors, we observed that AC children use them more frequently than NT children. The most common uses are in the initial and intermediate positions (linking clauses) and it seems to indicate that AC children master properly their functions as argumentative chaining operators. ‘Because´ is the most frequent connector in co-orientation uses, it is when it occurs in an intermediate position. The uses of ´but´ (anti-orientation connector) are less frequent although the qualitative analysis allows us to observe a more range of pragmatic functions.Facultad de Psicologí

Thrombolytic therapy in patients requiring cardiopulmonary resuscitation

Cardiopulmonary resuscitation (CPR) is often considered a contraindication to thrombolytic therapy for acute myocardial infarction. Of 708 patients involved in the first 3 Thrombolysis and Angioplasty in Myocardial Infarction trials of lytic therapy for acute infarction, 59 patients required 10 minutes was an exclusion of the trials) or required CPR within 6 hours of treatment. The patients receiving CPR were similar to the remainder of the group with respect to baseline demographics. The indication for CPR was usually ventricular fibrillation (73%) or ventricular tachycardia (24%). The median duration of CPR was 1 minute, with twenty-fifth and seventy-fifth percentiles of 1 and 5 minutes, respectively. The median number of cardioversions/defibrillations performed was 2 (twenty-fifth and seventy-fifth percentiles of 1 and 3 minutes, respectively). Patients receiving CPR were more likely to have anterior infarctions (66 vs 39%), the left anterior descending artery as the infarct-related artery (63 vs 38%) and lower ejection fractions on the initial ventriculogram (46 +/- 11 vs 52 +/- 12%) than those not receiving CPR. Inhospital mortality was 12 vs 6% with most deaths due to pump failure (57%) or arrhythmia (29%) in the CPR group and pump failure (38%) or reinfarction (25%) in the non-CPR group. At 7 day follow-up the CPR group had a significant increase in ejection fraction (+5 +/- 9%) compared with no change in non-CPR group. There were no bleeding complications directly attributed to CPR. In particular, the decrease in hematocrit (median 11) and need for transfusion (37 vs 32%) were the same in both groups. In addition, the CPR group did not spend more days in the cardiac care unit or in hospital than the non-CPR group.In conclusion, patients who have received CPR for <10 minutes had no additional complications attributable to thrombolytic therapy (95% confidence interval 0 to 5%). Therefore, CPR, especially of short duration, should not be considered a contraindication to lytic treatment. In addition, our results suggest that patients requiring CPR during acute infarction constitute a high-risk subgroup which may particularly benefit from receiving thrombolytic therapy.Peer Reviewedhttp://deepblue.lib.umich.edu/bitstream/2027.42/29089/1/0000124.pd