1,721,163 research outputs found
Geomorphology of the urban area of Palermo (Italy)
Full text linkThe results of a geomorphological study carried out in the urban area of Palermo are summarized in a thematic map. Field survey, analysis of aerial photographs and topographic maps, consultation of historical documents and maps, stratigraphic and topographic reconstruction from numerous wells and subsoil data, and bibliographic search were performed, in order to display the geomorphological changes produced by man over time in a densely populated area and to define the Anthropocene of the study area. Palermo town rises along large marine terrace surfaces cut by small river valleys and bordered by wide degraded and abandoned coastal cliffs. Over the last 2700 years, this area was affected by remarkable man-made changes to topographic surface and underground, exposing large areas of the city to hydraulic, sinkhole, and landslide risks, and increasing the levels of seismic susceptibility. In light of these results, the produced map is useful for urban planning studies
Abluftreinigung durch Elektronenstrahl. Die mobile Versuchsanlage AGATE-M
No full textIndustrial off gases, containing pollutants (Volatile Organic Compounds, NO_x) may be cleaned by irradiation with accelerated electrons. Laboratory tests show, that this process is especially suitable for low concentrated off gases because of high removal efficiencies at low energy consumption. In addition it must be noted, that the process is insensitive towards particulates and may be easily adjusted to different load conditions. The goals of this project are the test and the demonstration of the process in an industrial environment. The mobile test facility AGATE-M was constructed in cooperation between the Forschungszentrum Karlsruhe and the Institute for Surface Modification (IOM). As first projects we plan to use the mobile plant for cleaning the waste gases from paint production plant, from a remediation plant emitting chlorinated hydrocarbons (CHC) and from an automobil tunnel. The plant and the electron accelerator are controlled by programmable computer units. The relevant operation data are being measured by suitable instruments and saved by an electronic data logger. The gas compositions at the plants inlet and outlet are measured by flame ionization detector (FID) and by gas chromatography (GC). Additional analyzers are employed according to demand. (orig./SR)Industrielle Abgase, die Schadstoffe (Loesungsmittel, NO_x) enthalten, koennen durch Bestrahlung mit beschleunigten Elektronen gereinigt werden. In Laborversuchen konnte gezeigt werden, dass das Verfahren sich durch hohe Abscheidegrade bei niedrigem Energieverbrauch auszeichnet, insbesondere fuer stark verduennte Abluft. Weiterhin sind die Unempfindlichkeit des Verfahrens gegenueber staubfoermigen Verunreinigungen sowie seine leichte Regelbarkeit hervorzuheben. Fuer Versuche und Demonstration des Verfahrens zur Abluftreinigung durch Elektronenstrahl wurde der mobile Versuchsstand AGATE-M in Zusammenarbeit mit dem Institut fuer Oberflaechenmodifizierung (Leipzig) geschaffen. Zunaechst sind Einsaetze der Anlage zur Reinigung der Abgase einer Lackproduktion, einer CKW-Sanierungsmassnahme sowie der Abluft eines Automobiltunnels vorgesehen. Die Versuchsanlage ist weitgehend automatisiert. Sie wird durch eine Speicherprogrammierbare Steuerung (SPS) gesteuert. Die wesentlichen Betriebsdaten werden messtechnisch erfasst und mittels eines Datenloggers abgespeichert. Die Gaszusammensetzung wird roh- und reingasseitig durch einen Flammenionisationsdetektor (FID) sowie durch einen Gaschromatographen (GC) ueberwacht. Weitere Analysengeraete werden je nach Bedarf eingesetzt. (orig./SR)SIGLEAvailable from TIB Hannover: ZA 5141(5524) / FIZ - Fachinformationszzentrum Karlsruhe / TIB - Technische InformationsbibliothekDEGerman
Active north-vergent thrusting in the northern Sicily continental margin in the frame of the quaternary evolution of the Sicilian collisional system
No full textA three-stage evolution has characterized the Sicilian Fold and Thrust Belt (SFTB) during the last 15 My: two main thin-skinned shortening events involving mainly Meso-Cenozoic carbonate units, followed by thick-skinned thrusting involving Plio-Pleistocene deposits in the frontal area as well as the crystalline basement in the inner and deeper sector of the chain. We investigated the northern Sicily continental margin, by using differently-penetrative seismic reflection data and new field surveys, which revealed, both offshore and onshore, north-vergent compressional structures that affected the tectonic edifice during Quaternary time. These structures, correlated with the kinematic setting pointed out by seismicity and GPS measurements, could disclose an important change in distribution and orientation of deformation in the frame of the Africa-Europe convergence. Our hypothesis is that the most recent tectonic processes in the northern Sicily continental margin are representative of a jump of the deformation from the frontal area of the SFTB in the Sicily Channel to the inner sector in the Southern Tyrrhenian Sea. This study is in agreement with recent interpretations about a change in the subduction polarity in the central Mediterranean orogenic system, as a consequence of the ongoing collision of the African promontory with the thinned continental to oceanic sectors (Algerian and Tyrrhenian basins) of the European plate. The seismic activity associated with the north-vergent thrust could have implication for the assessment of the seismic risk in the Central Mediterranean and understanding of active structures in marine areas that could be responsible for tsunami hazard
Going Beyond Counting First Authors in Author Co-citation Analysis
Full text linkThe 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
Variations on the Author
Full text link“Variations on the Author” discusses two of Eduardo Coutinho’s recent films (Um Dia na Vida, from 2010, and Últimas Conversas, posthumously released in 2015) and their contribution to the general question of documentary authorship. The director’s filmography is characterized by a consistent yet self-effacing form of authorial self-inscription: Coutinho often features as an interviewer that rather than express opinions propels discourses; an interviewer that is good at listening. This mode of self-inscription characterizes him as an author who is not expressive but who is nonetheless markedly present on the screen. In Um Dia na Vida, however, Coutinho is completely absent form the image, while Últimas Conversas, on the contrary, includes a confessional prologue that moves the director from the margins to the center of his films. This article examines the ways in which these works stand out in the filmography of a director who offers new insights into the notion of cinematic authorship
Appropriate Similarity Measures for Author Cocitation Analysis
Full text linkWe provide a number of new insights into the methodological discussion about author cocitation analysis. We first argue that the use of the Pearson correlation for measuring the similarity between authors’ cocitation profiles is not very satisfactory. We then discuss what kind of similarity measures may be used as an alternative to the Pearson correlation. We consider three similarity measures in particular. One is the well-known cosine. The other two similarity measures have not been used before in the bibliometric literature. Finally, we show by means of an example that our findings have a high practical relevance.information science;Pearson correlation;cosine;similarity measure;author cocitation analysis
Dispelling the Myths Behind First-author Citation Counts
Full text linkWe 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
koamabayili/VECTRON-author-checklist: VECTRON author checklist
No full textWe have done our best to complete the author checklist relating to the use of animals in the hut study. Note that the objective for the hut study was to evaluate the IRS treatment applications for residual efficacy against Anopheles mosquitoes, including the local An. coluzzii mosquito population. Cows were only used to attract mosquitoes into the huts and no tests were carried out directly on the cows. The author checklist is intended for use with studies where experiments are carried out on animals, which is why we have had such difficulty in completing this for the hut study, as many of the questions do not relate to how the cows were used
- …
