98 research outputs found

    El teatro en la escuela : un espacio virtual

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    La cuestión principal que plantea el teatro en la escuela es la de su ubicación en el currículum: o bien en el área de educación artística, o bien en el de la educación física. Este artículo examina las dos posibilidades y se decanta por la segunda, es decir, por situarlo en el ámbito de una educaciónntegral del cuerpo donde la experiencia escénica, más que "enseñar a hacer teatro", permita al alumnado poner a prueba sus capacidades expresivo-comunicativas en un espacio de ficción que los libere de la pobre y rutinaria expresividad cotidiana

    An Analysis Of Blue Ash (fraxinus Quadrangulata) Regeneration In Southeastern Michigan In The Presence Of Emerald Ash Borer (agrilus Planipennis)

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    Abstract AN ANALYSIS OF BLUE ASH (FRAXINUS QUADRANGULATA) REGENERATION IN SOUTHEASTERN MICHIGAN IN THE PRESENCE OF EMERALD ASH BORER (AGRILUS PLANIPENNIS) by BENJAMIN A. SPEI May 2016 Advisor: Dr. Daniel M. Kashian Major: Biological Sciences Degree: Master of Science Since the introduction of the invasive bark beetle emerald ash borer (EAB) (Agrilus planipennis Fairmaire) (Coleoptera: Buprestidae) to southeastern Michigan, most native ash species (Fraxinus spp.) such as white ash (F. Americana), black ash (F. nigra), and green ash (F. pensylvanica) have suffered mortality rates exceeding 99% after infestation. This has led to the loss of seed sources resulting in a depleted seed bank and thus a loss of potential future regeneration. These trends suggest that these species will soon no longer function as important canopy species in North American hardwood forests as EAB continues to spread. Blue ash (F. quadrangulata) is thought to be the most resistant of all native ash species to EAB with observed mortality rates between 30% and 40%. This reduced mortality may be sufficient for mature blue ash trees to persist and maintain a seed bank robust enough to evolve even higher resistance to EAB. While several studies have quantified declining regeneration of other ash species, little research exists describing blue ash regeneration in the presence of EAB. A total of 18 blue ash stands were sampled at 6 different sites in southeastern Michigan near the EAB introduction point. For reference, 18 white ash (F. Americana) stands within the same 6 sites were also sampled. Observed overstory mortality for blue ash ranged between 7.1% and 31.6% and was significantly lower than white ash across all sites. Overstory blue ash was on average significantly older and larger than white ash across all sites and maintained a higher frequency of healthier crowns. Blue ash regeneration densities were found to be abundant at all sizes within all stands. New seedlings (\u3c 3 yrs old) were significantly more abundant for blue ash than white ash across all sites suggesting blue ash has not experienced the same depletion of its seed bank as white ash. Blue ash seedling growth rates were equal to or significantly greater than associate non-ash species at all size classes and at all sites; and equal to white ash seedling growth rates at the majority of sites and size classes with few exceptions. My results show blue ash maintaining a relatively healthy and dominant position in the canopy of several forests in southeastern Michigan. Furthermore, my results suggest that blue ash is still regenerating in a capacity that shows a high probability of canopy replacement by blue ash and thus its continued persistence in the presence of EAB

    Αξιοποίηση ιαματικών πηγών για τουρισμό και γεωθερμία με όρους προστασίας του περιβάλλοντος & αειφορίας: η περίπτωση της Ικαρίας.

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    Το νησί της Ικαρίας παρουσιάζει έντονους πετρογραφικούς μεταμορφικούς σχηματισμούς, και διακρίνεται από τρεις τεκτονικές-λιθοστρωματογραφικές ενότητες. Λόγω της ιδιαίτερης μορφολογίας της και διαμέσου των διαχωρισμών των πετρωμάτων, ανέρχονται τα θερμά νερά. Η Ικαρία διαθέτει πλήθος ιαματικών πηγών, οι οποίες εμφανίζονται σε ρηξιγενείς και μεταπτωσιγενείς περιοχές. Η ραδιενέργεια των πηγών οφείλεται στο ραδόνιο, κι έτσι οι συγκεκριμένες πηγές θεωρούνται από τις πλέον ραδιενεργές της υδρογείου. Είναι προφανές ότι στο πλαίσιο της εξεύρεσης οικονομικών πόρων μπορεί να αναπτυχθεί ο τουρισμός υγείας - ευεξίας, και ο ιαματικός τουρισμός να αποτελέσει μέσο αναζωογόνησης και ξεκούρασης, εκτός από μέσο θεραπείας. Η πλήρης αξιοποίηση των πηγών της Ικαρίας μπορεί να γίνει προς όφελος της οικονομίας σε εθνικό και τοπικό επίπεδο. Άλλωστε η διαχείριση αυτών με ορθολογικό τρόπο, μπορεί να γίνει επωφελής για την ανάπτυξη της περιφέρειας της Ελλάδας, μιας ανάπτυξης που θα μπορεί να γίνει με όρους αειφορίας, προστασίας του περιβάλλοντος και με βάση τη φέρουσα ικανότητα του νησιού. Είναι δηλαδή υψίστης σημασίας να αποφευχθεί η περιβαλλοντική υποβάθμιση, αξιοποιώντας τον κάθε φυσικό πόρο σύμφωνα με τη φέρουσα ικανότητά με σκοπό την επίτευξη σταθερής πηγής βιοπορισμού και προστασία - αποφυγή κατάρρευσης των οικοσυστημάτων. Τέλος, η Ικαρία λόγω της ιδιόμορφης γεωμορφολογικής και τεκτονικής της δομής, αποτελεί έναν τόπο προικισμένο στην γεωθερμία. Η φυσική θερμική ενέργεια που προέρχεται από το εσωτερικό της Γης, προσφέρει έναν ανεκτίμητο θησαυρό, που αν χρησιμοποιηθεί προς όφελος της τοπικής κοινωνίας, μπορεί να αποτελέσει εφαλτήριο, για μιαν άνθηση με περιβαλλοντικούς όρους.The island of Ikaria presents intense petrographic metamorphic formations, and is distinguished by three tectonic-lithostratigraphic units. Due to its special morphology and through the separations of the rocks, the warm waters rise. Ikaria has a number of thermal springs, which appear in rift and transitional areas. The radioactivity of the sources is due to radon, so the specific sources are considered among the most radioactive on the planet. It is obvious that in the context of finding economic resources, health-wellness tourism can be developed, and spa tourism can be a means of rejuvenation and relaxation, in addition to a means of treatment. The full exploitation of the sources of Ikaria can be done for the benefit of the economy at the national and local level. After all, the management of these in a rational way can be beneficial for the development of the region of Greece, a development that can be done in terms of sustainability, environmental protection and based on the carrying capacity of the island. In other words, it is of the utmost importance to avoid environmental degradation, exploiting each natural resource according to its carrying capacity in order to achieve a stable source of livelihood and protect-avoid the collapse of ecosystems. Finally, Ikaria, due to its peculiar geomorphological and tectonic structure, is a place gifted with geothermal energy. The natural thermal energy that comes from the interior of the Earth offers an invaluable treasure, which if used for the benefit of the local society, can be a springboard for a flourishing in environmental terms

    Mediterranean diet and bladder cancer risk in Italy

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    Previous studies have reported that Mediterranean diet is inversely related to the risk of several neoplasms; however, limited epidemiological data are available for bladder cancer. Thus, we examined the association between Mediterranean diet and this neoplasm in an Italian multicentric case-control study consisting of 690 bladder cancer cases and 665 controls. We assessed the adherence to the Mediterranean diet via a Mediterranean Diet Score (MDS), which represents the major characteristics of the Mediterranean diet and ranges from 0 to 9 (from minimal to maximal adherence, respectively). We derived odds ratios (ORs) of bladder cancer according to the MDS score from multiple logistic regression models, allowing for major confounding factors. The ORs of bladder cancer were 0.72 (95% confidence interval, CI, 0.54\u20130.98) for MDS of 4\u20135 and 0.66 (95% CI, 0.47\u20130.93) for MDS of 6\u20139 (p for trend = 0.02) compared to MDS = 0\u20133. Results were similar in strata of sex, age, and education, while the risk appeared somewhat lower in never-smokers and patients with pT1\u2013pT4 bladder carcinomas. Among individual components of the MDS, we observed inverse associations for greater consumption of legumes, vegetables, and fish. In our study, which was carried out on an Italian population, the higher adherence to the Mediterranean diet was related to a lower risk of bladder cancer
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