Search results for "risc"
showing 10 items of 584 documents
Ranke, Burckhardt e il "rinascimento orientale"
2020
Il saggio ricostruisce le reazioni di Ranke e di Burckhardt al "Rinascimento Orientale" del romanticismo e della cultura del tardo Ottocento. I temi trattati riguardano il tema della violenza nella storia, il significato del "sacrificio", il pericolo dell'anonimato e del quantitativo nella vita metropolitana. Un riferimento importante è svolto nel saggio da Quinet, cui si ricorre come a un "fil rouge". What stance on “Eastern Renaissance” did Ranke and Burckhardt take? This subject needed to make a survey of the German-Romantic idea of the East, focusing on Herder’s anthropology. Notoriously, Ranke and Burckhardt were very different historians, but they shared a negative opinion on “Eastern…
Kinematics, deformation partitioning and late Variscan magmatism in the Agly massif, Eastern Pyrenees, France
2020
International audience; In order to constrain the finite deformation pattern of the Variscan basement of the Agly massif, a detailed structural analysis over the whole Agly massif was performed. Our investigation combined geological mapping, reappraisal of published and unpublished data completed with our own structural work. Results are provided in the form of new tectonic maps and series of regional cross-sections through the Agly massif. At variance from previous studies, we identified three deformation fabrics named D1, D2 and D3. The D1 deformation is only relictual and characterized by a broadly northwest-southeast striking and eastward dipping foliation without any clear mineral and …
Characterization of a Newly Developed Aircraft-Based Laser Ablation Aerosol Mass Spectrometer (ALABAMA) and First Field Deployment in Urban Pollution…
2011
We present here the development and first field deployment of a novel Aircraft-based Laser ABlation Aerosol MAss spectrometer (ALABAMA), which is capable of measuring the chemical composition and size of individual ambient aerosol particles in the size range between 150 and 900 nm. The instrument uses a continuous wave 532 nm laser to size and detect the particles, a pulsed 266 nm laser to ablate and ionize the particles, and a bipolar, Z-shaped time-of-flight mass spectrometer to detect positive and negative ions. The ALABAMA fits into a 19"-aircraft rack of 150 cm height and has a total weight of 140 kg, thus currently being one of the smallest and lightest-weight instruments of its type.…
Rich fen development in CE Europe, resilience to climate change and human impact over the last ca. 3500 years
2017
Here, for the first time in SE Poland, we document the long-term development of a rich fen and assess its sensitivity to climate change and human impacts over the last ca. 3500 years. Our results are based on a high-resolution, continuous plant macrofossil remains, mollusc and pollen record, complemented by geochemical, mineral magnetic and physical characterisation, and radiocarbon dating from Bagno Serebryskie rich fen located in SE Poland. Based on the palaeoecological data we distinguished five stages of wet habitat conditions: 5000–3300, 2800–2150, 1600–1100, 750–230, 150–10 cal yr BP and five dry periods at ca. 3300–2800, 2150–1600, 1100–750, 230–150, 10 to − 64 cal yr BP. The pollen …
Development of Rich Fen on the SE Baltic Coast, Latvia, during the Last 7500 Years, Using Paleoecological Proxies: Implications for Plant Community D…
2016
We present the paleoecological development of a rich fen located in the dune area on the SE Baltic coast, during the last 7500 years. The Apsuciems Mire hosts rare and endangered plant communities in Europe, such as Schoenus ferrugineus and Cladium mariscus. Analysis at high-resolution of plant macroremains in two peat cores was carried out to reconstruct local vegetation succession and fluctuations in moisture availability on the peatland, while a pollen record was developed to reconstruct plant succession, moisture variability and human activity at the regional scale. Based on the presence or the absence of macroremains of plants that occur in wet habitat e.g. Cladium mariscus, Schoenople…
Responses of a native plant species from invaded and uninvaded areas to allelopathic effects of an invader
2019
Invaders exert new selection pressures on the resident species, for example, through competition for resources or by using novel weapons. It has been shown that novel weapons aid invasion but it is unclear whether native species co‐occurring with in‐ vaders have adapted to tolerate these novel weapons. Those resident species which are able to adapt to new selective agents can co‐occur with an invader while others face a risk of local extinction. We ran a factorial common garden experiment to study whether a native plant species, Anthriscus sylvestris, has been able to evolve a greater tolerance to the allelochemicals exerted by the invader, Lupinus polyphyllus. Lupinus polyphyllus produces …
Survival of an Endangered OrchidLiparis loeseliiin Habitats with Different Water Level Fluctuations
2018
Liparis loeselii (L.) Rich. is an endangered orchid species which occurs in wetland habitats. For successful conservation of this orchid it is necessary to recognize its adaptive traits and special habitat requirements. Therefore, we examined morphological and anatomical traits in relation to the water level, cover of vascular plants and seed viability of L. loeselii in habitats with different water level fluctuations. Field studies of L. loeselii were carried out in nine localities and four habitat types: alkaline fen, calcareous fen with Cladium mariscus, transition mire and quaking bog. The fluctuations of seasonal water level were defined in the range from dry substrate to short time fl…
Early cave art and ancient DNA record the origin of European bison
2016
The two living species of bison (European and American) are among the few terrestrial megafauna to have survived the late Pleistocene extinctions. Despite the extensive bovid fossil record in Eurasia, the evolutionary history of the European bison (or wisent, Bison bonasus) before the Holocene (<11.7 thousand years ago (kya)) remains a mystery. We use complete ancient mitochondrial genomes and genome-wide nuclear DNA surveys to reveal that the wisent is the product of hybridization between the extinct steppe bison (Bison priscus) and ancestors of modern cattle (aurochs, Bos primigenius) before 120 kya, and contains up to 10% aurochs genomic ancestry. Although undetected within the fossil re…
Efectos organizacionales y activacionales de la testosterona sobre la asunción de riesgos en conductas económicas: una revisión sistemática
2017
Resumen El objetivo de esta revision sistematica es evaluar la influencia de la testosterona circulante (efectos activacionales) y de la exposicion prenatal a ella (efectos organizacionales) sobre la asuncion de riesgos en conductas economicas, evaluando los trabajos de investigacion existentes hasta la fecha acerca de la tematica. La base bibliografica analizada se obtuvo de distintas bases de datos especializadas en el ambito de la psicologia y las neurociencias. Los resultados obtenidos concluyen en una relacion contrastada entre la testosterona circulante y la asuncion de riesgo financiero. En lo referente a la exposicion prenatal se evidencia un estado inmaduro de la investigacion sobr…
El Valle de Ayora
1982
¿Qué es el Valle de Ayora? El Valle de Ayora forma una comarca situada en una espaciosa hoya rodeada de elevados montes. Consta de seis municipios: Cofrentes, Jalance, Jarafuel, Teresa de Cofrentes, Zarra y Ayora. Las villas están situadas en lugares estratégicos, coincidiendo en ellas alturas coronadas de castillos —a excepción de Zarra—, de larga tradición histórica. Todos estos castillos datan de siglos, algunos incluso de antiguos bastiones romanos. Durante la época musulmana el Valle tuvo mucha importancia por ser zona de tránsito entre reinos y frontera de los mismos. El Valle es una comarca natural con características muy comunes. Todas las villas de la comarca se encuentran en el ce…