323,049 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
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
Diffusive author(s), cohesive author: Analysis of S/N (1994)
No full textThis study indicates the ways in which various aspects of the author(s) are brought forth in Dumb type’s performance art, the S/N production. Previous research has suggested a non-hierarchical organization of Dumb type and the absence of a “privileged author” in Dumb type’s collaborative work, S/N. However, the results that I have investigated from member’s interviews on the creative process of S/N along with my analysis of the recorded images of S/N, indicate a different aspect of the author(s). First, S/N was created through, so to speak, the collective ideas of the members of Dumb type. Further, S/N has at least nine quotations from previous performances, installations, and printed writings, besides the work-in-progress technique. Explicating one of the “author functions” as given by Michel Foucault, each text has plural subjects of the author. However, it has been revealed from members’ interviews that Teiji Furuhashi had a decision-making role in selecting the members’ ideas within the performance. Since then, S/N has had plural subjects of creation; however, Furuhashi is one of the subjects of creation along with the “privileged author.” S/N has plural authors (diffusive authors) yet at the same time, it has a “privileged author,” Teiji Furuhashi (cohesive author)
Going Beyond Counting First Authors in Author Co-citation Analysis
No full textThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
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)
Dispelling the Myths Behind First-author Citation Counts
No full textWe conducted a full-scale evaluative citation analysis study of scholars in the XML research field to explore just how different from each other author rankings resulting from different citation counting methods actually are, and to demonstrate the capability of emerging data and tools on the Web in supporting more realistic citation counting methods. Our results contest some common arguments for the continued
use of first-author citation counts in the evaluation of scholars, such as high correlations between author rankings by first-author citation counts and other citation
counting methods, and high costs of using more realistic citation counting methods that are not well-supported by the ISI databases. It is argued that increasingly available digital full text research papers make it possible for citation analysis studies to go beyond what the ISI databases have directly supported and to employ more
sophisticated methods
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