455 resultados para Mite


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Dossier

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La finalidad de la investigaci??n es profundizar en el conocimiento de la supervisi??n de las pr??cticas, como elemento clave de la formaci??n profesional del estudiante, adem??s de constatar si cumplen una funci??n formativa o es un tr??mite formal. El dise??o de la investigaci??n comprende la realizaci??n de varios estudios estad??sticos y un estudio de casos, cada uno de ellos cuenta con unos instrumentos espec??ficos. Los resultados se agrupan en diversos apartados: la concepci??n de la pr??ctica, complejidad de la funci??n supervisora, la coordinaci??n, la cualificaci??n y formaci??n espec??fica de los agentes de la supervisi??n. En el apartado de conclusiones destaca, entre otros aspectos, que los resultados de los estudios emp??ricos difieren de los del estudio de casos, despu??s de analizar estas diferencias, finaliza con unas reflexiones..

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Entre la prohibici??n y la obligaci??n se extiende el territorio de lo aceptable. Ambas fronteras delimitan el espacio de la convivencia. La vida social se desarrolla en un espacio delimitado por normas, que imponen l??mites y ofrecen posibilidades. Ante los conflictos con las normas o los l??mites, hay que ejercer la autoridad y la pedagog??a. Padres y educadores deben explicar la necesidad de los l??mites. Por otro lado, ante un l??mite se puede actuar respet??ndolo, resignarse sumisamente o transgredirlo. La transgresi??n puede ser por inmadurez o por desobediencia responsable. La autoridad educativa no consiste en prohibir y reprimir, sino en ayudar a tomar decisiones aut??nomas. Se debe ceder el poder a los alumnos para llegar a la autodisciplina. Y por ??ltimo, se debe confiar en que esta estrategia funcione sin estar pendiente de los resultados.

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Memoria de m??ster (Universidad de Barcelona, 2012)

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Se presentan algunas reflexiones de los aspectos a tener en cuenta por el profesorado de Educaci??n F??sica en las adaptaciones al alumnado que presenta discapacidad visual, como son las distintas afecciones: ceguera total o parcial, con baja visi??n, o alumnado con visi??n l??mite y sus distintas peculiaridades. Antes de intervenir se hace necesario un acercamiento inicial para conocer cu??l es el d??ficit y lo que produce. La palabra ser?? la principal v??a de comunicaci??n entre el profesorado y el alumnado con discapacidad visual, siendo necesario verbalizar cada una de las acciones que se realicen

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Monogr??fico con el t??tulo: 'La convivencia en el marco escolar. Reflexiones para una actuaci??n inspectora'

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Mites are involved in the decomposition of animal carcases and human corpses at every stage. From initial decay at the fresh stage until dry decomposition at the skeletal stage, a huge diversity of Acari, including members of the Mesostigmata, Prostigmata, Astigmata, Endeostigmata, Oribatida and Ixodida, are an integral part of the constantly changing food webs on, in and beneath the carrion. During the desiccation stage in wave 6 of M,gnin's system, mites can become the dominant fauna on the decomposing body. Under conditions unfavourable for the colonisation of insects, such as concealment, low temperature or mummification, mites might become the most important or even the only arthropods on a dead body. Some mite species will be represented by a few specimens, whereas others might build up in numbers to several million individuals. Astigmata are most prominent in numbers and Mesostigmata in diversity. More than 100 mite species and over 60 mite families were collected from animal carcases, and around 75 species and over 20 families from human corpses.

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This paper analyses acarological evidence from a 130-year-old forensic investigation. It was the first case in forensic acarology, i.e., the first case where mites provided substantial information to estimate the post-mortem interval (PMI). In 1878, the mites found in the mummified body of a newborn baby girl in Paris, France, were studied by acarologist and forensic entomologist Jean Pierre M,gnin. M,gnin estimated around 2.4 million mites in the skull and identified them as Tyroglyphus longior (Gervais), a junior synonym of Tyrophagus longior. He suggested that the arrival of these mites at the corpse would have occurred by phoresy on carrier insects, roughly 5 months before the autopsy. There is no doubt about the identification of the mites, M,gnin was a highly respected acarologist. However, two main factors affecting the biology of Tyrophagus mites were not included in the original analysis. First, M,gnin stated that the mites were phoretic. However, he probably did not have access to information about the natural history of the species, because as a rule Tyrophagus mites are non-phoretic. Considering the omnipresence of Tyrophagus mites in soil, most likely the mites will have arrived almost immediately after death. Second, temperature was not taken into account during the estimations of the mite population growth rate. The new analysis is based on current knowledge of Tyrophagus biology and includes temperature, estimated following a handful of weather reports of the years 1877 and 1878. The new projections indicate that non-phoretic mites may have colonised the body just after death and the colony would have built up over 8 months, contrary to the 5 months proposed by M,gnin. This new lapse of time agrees with the PMI proposed by Brouardel: on 15 January 1878 he postulated the death of the newborn to have occurred some 8 months before the autopsy.

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Phoretic mites are likely the most abundant arthropods found on carcases and corpses. They outnumber their scavenger carriers in both number and diversity. Many phoretic mites travel on scavenger insects and are highly specific; they will arrive on a particular species of host and no other. Because of this, they may be useful as trace indicators of their carriers even when their carriers are absent. Phoretic mites can be valuable markers of time. They are usually found in a specialised transitional transport or dispersal stage, often moulting and transforming to adults shortly after arrival on a carcase or corpse. Many are characterised by faster development and generation cycles than their carriers. Humans are normally unaware, but we too carry mites; they are skin mites that are present in our clothes. More than 212 phoretic mite species associated with carcases have been reported in the literature. Among these, mites belonging to the Mesostigmata form the dominant group, represented by 127 species with 25 phoretic mite species belonging to the family Parasitidae and 48 to the Macrochelidae. Most of these mesostigmatids are associated with particular species of flies or carrion beetles, though some are associated with small mammals arriving during the early stages of decomposition. During dry decay, members of the Astigmata are more frequently found; 52 species are phoretic on scavengers, and the majority of these travel on late-arriving scavengers such as hide beetles, skin beetles and moths. Several species of carrion beetles can visit a corpse simultaneously, and each may carry 1-10 species of phoretic mites. An informative diversity of phoretic mites may be found on a decaying carcass at any given time. The composition of the phoretic mite assemblage on a carcass might provide valuable information about the conditions of and time elapsed since death.