961 resultados para Last deglaciation


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The questions set on databases with solutions.

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In this article we make a critical analysis about the situation of maternal mortality in Colombia, considering some of the most current rates of this problem and the public policy rules adopted in the last years to decrease its prevalence. We think that the rate of maternal mortality in Colombia is too hight because the State does not guarantee the right health care to Colombian women. In this way, the structure and resources distribution established by the policies on sexual and reproductive health have not reflected the population necessities, specially in the case of young mothers left aside by the social security system.

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Es por la noche y toda la familia Bean se va a la cama pero el señor Bean no puede dormir y la señora Bean empieza a roncar, entonces decide ir a la habitación de su hijo pero éste esta jugando a ser un avión. Se baja a la cocina, sale al jardín, se sube al coche pero tampoco concilia el sueño. Cuando regresa a su cama suena el despertador.

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Es por la noche y toda la familia Bean se va a la cama pero el señor Bean no puede dormir y la señora Bean empieza a roncar, entonces decide ir a la habitación de su hijo pero éste esta jugando a ser un avión. Se baja a la cocina, sale al jardín, se sube al coche pero tampoco concilia el sueño. Cuando regresa a su cama suena el despertador.

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Maurice se sube en la silla para alcanzar la última galleta de chocolate que queda en el plato, pero su madre le advierte que primero ha de ofrecerla a los demás. Y Maurice hace exactamente lo que se le dice y la ofrece absolutamente a todos. Incluso, a un monstruo del espacio.

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Es por la noche y toda la familia Bean se va a la cama pero el señor Bean no puede dormir y la señora Bean empieza a roncar, entonces decide ir a la habitación de su hijo pero éste esta jugando a ser un avión. Se baja a la cocina, sale al jardín, se sube al coche pero tampoco concilia el sueño. Cuando regresa a su cama suena el despertador.Edición idónea para la lectura compartida.

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The presentation will focus on ICOM Switzerland‘s works concerning training designed for museums professionals. Its implication in this field is increasing, within the framework of its own offer of continuous education, as well as within partnerships with other external institutions (for example universities).In September 2008, the first Master in Museology in Switzerland (Master en études muséales) will be launched, as a result of the cooperation of ICOM Switzerland, the University of Neuchâtel and l‘Association des musées suisses (the National Swiss Museums Association).ICOM Switzerland is involved in reflections with museum professionnals. For instance, it collaborated with Swiss museum educators (the médiateurs culturels) in order to define quality standards for their working areas. This year also, a certification has also been set up, regarding training for museums professionals. The project has been presented in Vienna last year and it is now operational.

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We have integrated information on topography, geology and geomorphology with the results of targeted fieldwork in order to develop a chronology for the development of Lake Megafazzan, a giant lake that has periodically existed in the Fazzan Basin since the late Miocene. The development of the basin can be best understood by considering the main geological and geomorphological events that occurred thought Libya during this period and thus an overview of the palaeohydrology of all Libya is also presented. The origin of the Fazzan Basin appears to lie in the Late Miocene. At this time Libya was dominated by two large rivers systems that flowed into the Mediterranean Sea, the Sahabi River draining central and eastern Libya and the Wadi Nashu River draining much of western Libya. As the Miocene progressed the region become increasingly affected by volcanic activity on its northern and eastern margin that appears to have blocked the River Nashu in Late Miocene or early Messinian times forming a sizeable closed basin in the Fazzan within which proto-Lake Megafazzan would have developed during humid periods. The fall in base level associated with the Messinian desiccation of the Mediterranean Sea promoted down-cutting and extension of river systems throughout much of Libya. To the south of the proto Fazzan Basin the Sahabi River tributary know as Wadi Barjuj appears to have expanded its headwaters westwards. The channel now terminates at Al Haruj al Aswad. We interpret this as a suggestion that Wadi Barjuj was blocked by the progressive development of Al Haruj al Aswad. K/Ar dating of lava flows suggests that this occurred between 4 and 2 Ma. This event would have increased the size of the closed basin in the Fazzan by about half, producing a catchment close to its current size (-350,000 km(2)). The Fazzan Basin contains a wealth of Pleistocene to recent palaeolake sediment outcrops and shorelines. Dating of these features demonstrates evidence of lacustrine conditions during numerous interglacials spanning a period greater than 420 ka. The middle to late Pleistocene interglacials were humid enough to produce a giant lake of about 135,000 km(2) that we have called Lake Megafazzan. Later lake phases were smaller, the interglacials less humid, developing lakes of a few thousand square kilometres. In parallel with these palaeohydrological developments in the Fazzan Basin, change was occurring in other parts of Libya. The Lower Pliocene sea level rise caused sediments to infill much of the Messinian channel system. As this was occurring, subsidence in the Al Kufrah Basin caused expansion of the Al Kufrah River system at the expense of the River Sahabi. By the Pleistocene, the Al Kufrah River dominated the palaeohydrology of eastern Libya and had developed a very large inland delta in its northern reaches that exhibited a complex distributary channel network which at times fed substantial lakes in the Sirt Basin. At this time Libya was a veritable lake district during humid periods with about 10% of the country underwater. (C) 2008 Elsevier B.V. All rights reserved.

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Simulations of the last 500 yr carried out using the Third Hadley Centre Coupled Ocean-Atmosphere GCM (HadCM3) with anthropogenic and natural (solar and volcanic) forcings have been analyzed. Global-mean surface temperature change during the twentieth century is well reproduced. Simulated contributions to global-mean sea level rise during recent decades due to thermal expansion (the largest term) and to mass loss from glaciers and ice caps agree within uncertainties with observational estimates of these terms, but their sum falls short of the observed rate of sea level rise. This discrepancy has been discussed by previous authors; a completely satisfactory explanation of twentieth-century sea level rise is lacking. The model suggests that the apparent onset of sea level rise and glacier retreat during the first part of the nineteenth century was due to natural forcing. The rate of sea level rise was larger during the twentieth century than during the previous centuries because of anthropogenic forcing, but decreasing natural forcing during the second half of the twentieth century tended to offset the anthropogenic acceleration in the rate. Volcanic eruptions cause rapid falls in sea level, followed by recovery over several decades. The model shows substantially less decadal variability in sea level and its thermal expansion component than twentieth-century observations indicate, either because it does not generate sufficient ocean internal variability, or because the observational analyses overestimate the variability.