263 research outputs found
The LEGEND experiment for the search for the Majorana neutrino
No full textThe search for the neutrinoless double beta (0νββ) decay is con- sidered the most promising way to prove the Majorana nature of neutrinos. The LEGEND (Large Enriched Germanium Detector for Neutrinoless ββ Decay) col- laboration aims at building a 1 ton 76Ge-based 0νββ experiment with 3σ half-life discovery sensitivity of 1028 years to fully span the inverted neutrino mass ordering region. Combining the efforts of previous Gerda and MAJORANA experiments, the LEGEND project will first proceed by deploying 200 kg of enriched HPGe de- tectors in the already existing Gerda facility at Laboratori Nazionali del Gran Sasso (LNGS) in Italy. With an exposure of 1 t·yr and a background index of 0.5 counts/(FWHM·t·yr), LEGEND-200 will reach a 3σ half-life discovery sensitivity for the 0νββ decay of 1027 yr. An overview of the LEGEND project together with the current status and preliminary performance of LEGEND-200 are presented in this work
L'ultimo Doeblin: Das Goldene Tor e la ricerca della verità << durch das Tor des Grauens und der Verzweiflung>>
No full textAlfred Döblin is one of the most important writers of the twentieth century, ceaselessly inventive and productive, and comparable to his contemporaries Thomas Mann, Robert Musil and Franz Kafka. His works are unique, they often seem confused and challenging, but in their polyphonic, kaleidoscopic nature lies their importance. However, still to this day, the popular reception of Döblin rests almost solely on Berlin Alexanderplatz. His reputation grew throughout the Sixties encouraged by Günther Grass’s speech Über meinen Lehrer Döblin in 1967.
This work aims to analyse the late Döblin’s work whilst reflecting on his engagement with Germany and its population after the Second World War and on his perpetual search for truth. After 12 years exile around Europe first, and then in America, Döblin decided to return to Germany immediately after the end of the War. He wanted to contribute to the re-education and the denazification of the land and of the people. After examining the causes that had led to the tragedy of Nazism and therefore the condition of his fellow countrymen, he started a re-educational program which included the establishment of the magazine «Das Goldene Tor», which was published from 1946 to 1951, but which turned out to be a failure. The magazine should have contributed to the freedom and the solidarity of people and populations and aimed to recover the spiritual continuity that the Nazism had sharply interrupted. His conversion to Catholic religion, which had started in 1940 in France during his exile and had been completed the following year in Los Angeles, played a central role for the author and for his program. After the failure of his magazine, Döblin didn’t lose his enthusiasm and his determination but influenced by Tauler and Kierkegaard understood that an ethic revolution still could take place in everyone’s inner being. This emerges in Döblin’s late works, especially in November 1918 and in Hamlet oder die lange Nacht nimmt ein Ende. After the exploration of these two works and their two protagonists’ life paths throughout evil and pain, we come to the author’s truth: evil and sufferings are parts of human existence, which are finally to be perceived as positive experiences leading the individuals to their redemption. In his last years, Döblin got more and more influenced by the Christian religion, the New Covenant, the Gospels and especially by Saint Paul. In his last autobiographical memories, Vom Leben und Tod, die es beide nicht gibt, Döblin realized that life and death are only parts of our life cycle and in the very union with God man can reach salvation and the real truth
Stabilized materials from contaminated waste recycling : characterization, immobilization, and leaching of contaminants
No full textThe contamination of soils, sediments, and industrial wastes from both heavy metals and organic pollutants is recognised as a very important environmental problem, highlighting the need to improve or develop effective remediation techniques to support sustainable management strategies.
In particular, the High Performance Solidification/Stabilization process is a S/S treatment specifically addressed to the production of a granular material reusable as building material. In this context, it is fundamental to understand the mechanisms involved in the retention and leaching of potentially hazardous contaminants from the granular material produced, to both improve their performances and develop new processes for the sustainable management of contaminated matrixes.
This Ph.D. thesis focuses on the characterization of several stabilized granular materials obtained from the application HPSS® process by means of analytical techniques such as Inductively Coupled Plasma Mass and Optical Emission Spectrometry (ICP-MS and ICP-OES), Ultraviolet–Visible spectroscopy (UV-Vis), Gas Chromatography (GC), X-Ray Diffraction (XRD), and Scanning Electron Microscopy (SEM).
The results obtained were helpful to elucidate the mechanisms, mineralogical phases, and key parameters regulating the solidification/stabilization performances of the different binders used in the treatment of different contaminated matrixes. Moreover, a new integrated process for heavy metals’ recovery from stabilized matrixes through alkaline soil washing, nanofiltration and heavy metals’ chemical precipitation was developed and tested.
The overall experimental activity led to the draft of four manuscripts that are discussed in detail in this thesis
Avaliação da lima ácida Tahiti em diferentes porta-enxertos na região do Submédio São Francisco.
No full textO objetivo deste trabalho foi identificar a(s) melhor(es) combinações de porta-enxerto para a lima ácida Tahiti irrigada no vale do São Francisco
Virtual stenting of iliac arteries: a new technique for choosing stents and stent-grafts by means of 3D rotational angiography. Preliminary data
No full textPURPOSE:
Virtual stenting (VS) is a new tool in the 3D processing work station of rotational angiography (RA) systems. This tool enables the 3D visualization of a stent or stent-graft in the site of a stenotic, obstructive or aneurysmatic lesion to be treated. We report the preliminary results obtained with this software in the treatment of segmental stenotic, obstructive or aneurysmal lesions of the iliac artery.
MATERIALS AND METHODS:
Seventeen patients under-went rotational angiography and 3D reformations for one or more stenoses (19 cases), obstructive lesions (2 cases) or aneurysms (2 cases) of the common and/or external iliac artery and were treated with stents in 22/23 of cases. In all cases, the VS tool was applied to the stenotic-obstructive lesion on the identified on the 3D angiogram obtained before the stenting procedure.
RESULTS:
The measurements of the stents/stents-grafts (length, proximal and distal diameter) provided by the tool were compared to those of the stent deployed. In 22/23 procedures, the measurements of virtual stenting and those of the deployed stent showed a good level of concordance. The system failed to provide correct measurements in only one long and tortuous iliac aneurysm.
CONCLUSIONS:
The ''virtual stenting'' tool proved to be reliable and fast, and enabled a more objective selection of the stent to be deployed on a stenotic-obstructive lesion in almost all cases. In cases of aneurysms of marked tortuosity, the system tends to suggest an inappropriate stent. The possibility of manually defining the optimal stent path within the aneurysmal sac might be useful
Reflexões impostas pela pandemia do novo coronavírus. Sairemos melhor dela?
No full textBook review:Sobrinho, L. L. P; Calgaro, C.; Rocha, L. S. (Orgs.). COVID-19 e seus paradoxos. Dados eletrônicos Itajaí, SC: UNIVALI, 2020. 424 p. (E-book).Resenha do livro:Sobrinho, L. L. P; Calgaro, C.; Rocha, L. S. (Orgs.). COVID-19 e seus paradoxos. Dados eletrônicos Itajaí, SC: UNIVALI, 2020. 424 p. (E-book)
A multitechnique approach for the identification of multiple contamination sources near a polluted industrial site
No full textDegraded land requires rapid and suitable remedial actions, thus appropriate and fast methodological approaches for estimating the spatial distribution of contaminants are needed. In this context, a methodological approach combining isotopic measurements, heavy metals concentrations mapping, X-ray diffraction, and cluster analysis, was applied to characterize a polluted industrial site where the contamination due to improper waste disposal could have spread also into the surrounding fields. This approach was applied to a set of representative topsoil (from 15 to 30 cm depth) and subsoil (from 130 to 150 cm depth) samples, selected either inside or outside the contaminated site. The X-ray diffraction analysis highlighted that only the mineralogy of the subsoil below the buried waste was noticeably altered, while the concentration mapping highlighted that the levels of several heavy metals on the edge of the contaminated site, at both depths, were very similar to those found in the samples from the outside. Based on these findings, Pb was used as a tracer for heavy metal pollution by its stable isotopes' analysis. The cluster analysis of the isotopic measurements revealed that only the contamination detected inside the industrial site could be attributed to the pollutants migration from the buried waste. Conversely, the contaminants concentrations found in the topsoil samples taken outside the site could be ascribed to contamination sources other than the polluted waste present inside the site
Multimodal approach to the endovascular treatment of embolisation or exclusion of the renal arteries and their distal and/or polar branches: personal experience
No full textNeonatal Intensive Care Unit Evacuation and Care During a Natural Disaster: The Experience of Cyclone Idai in Beira, Mozambique
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