103,152 research outputs found
Archaeology and Hydrogeology in Sicily: Solunt and Tindari
No full textThis contribution concerns the relationship between the hydrogeological and archaeological characteristics of Solunt and Tindari (North Sicily), within the framework of the Watertraces project. The two cities face the Tyrrhenian Sea, on the northern coast of Sicily, are characterised by a relatively recent urban history compared to other Greek or Phoenician cities, being founded in the 4th century BC. The Hellenistic-Roman city of Solunt was moved from the promontory of Solanto to Mount Catalfano after the devastation of the first in 397 BC. The new position of the habitat offered advantageous defensive conditions and allowed it to control a vast territory, from the Gulf of Palermo to the Gulf of Termini and the hinterland. The steep slopes of Mount Catalfano did not prevent the inhabitants realising a regular urban network. Considering the hydrogeological characteristics of the mountain, the rise of hydrothermal waters along fracking planes led to the formation of small surges which were used by the inhabitants and whose waters were collected through tanks and basins. In this way, the city could benefit from a double supply of water: precipitation and natural rises.
Tindari is also located on a cliff overlooking the sea. The site was founded at the beginning of the 4th century BC. The city soon became an important commercial centre due to its advantageous geographical location. As for Solunt, the orographic features provided an important natural defence of the site, reinforced by powerful ramparts embracing the contour lines. The discovery of travertine formations close to a cistern underlines, as in Solunt, the importance of the hydrogeological context, here characterised by karst exes whose waters served the city and more probably the public area.
In Solunt and Tindari, the hydrothermal and karstic springs are now dry. This could be related to a seismic event described in the ancient sources. We know in fact that the city of Tindari was shaken by several earthquakes during its history. One of them is reported to us by Pliny and dates back to the 1st century BC. Another one would have caused several devastations in the city during the late period. Ongoing analyses at the archaeological, geomorphological, hydrogeological and palaeosimological levels, coupled with geochronology and isotopic water geochemistry, little by little, we discover the history of the water supply and management of these two key cities of the Hellenistic-Roman Sicilian world
Inner-outer curvatures, Ollivier-Ricci curvature and volume growth of graphs
No full textWe are concerned with the study of different notions of curvature on graphs. We show that if a graph has stronger inner-outer curvature growth than a model graph, then it has faster volume growth too. We also study the relationships of volume growth with other kind of curvatures, such as the Ollivier-Ricci curvature
Duvalius (Neoduvalius) G. Muller 1913
No full textSubgenus <i>Neoduvalius</i> G. Müller, 1913b <p> <i>Neoduvalius</i> M̹ller, 1913b: 180; type-species: <i>Anophthalmus reitteri</i> L. Miller, 1881.</p> <p> <i>= Serboduvalius</i> Ćurčić S.B., Pavićević & Ćurčić B.P.M., 2001: 52; type-species: <i>Serboduvalius dragacevensis</i> Ćurčić S.B., Pavićević & Ćurčić B.P.M.</p> <p> = <i>Rascioduvalius</i> Ćurčić S.B., Brajković, Mitić & Ćurčić B.P.M., 2003: 484; type-species: not designated (formally unavailable - see Belousov, 2017 - but it is obvious that the author worked with <i>Duvalius cvijici</i>)</p> <p>This heterogenous subgenus actually comprises 20 taxa distributed from the north of Croatia to the southwestern part of Serbia and northern area of Montenegro (Belousov, 2017).</p>Published as part of <i>Quéinnec, Eric & Ollivier, Eric, 2021, Duvalius (Neoduvalius) lohaji n. sp., a new remarkable subterranean taxon of the isotopic Trechini lineage from Dinaric karst, Bosnia and Herzegovina (Coleoptera Carabidae: Trechinae), pp. 173-192 in Zootaxa 4942 (2)</i> on page 176, DOI: 10.11646/zootaxa.4942.2.2, <a href="http://zenodo.org/record/4600424">http://zenodo.org/record/4600424</a>
En Orient; études ethnologiques et linguistiques a travers les ages et les peuples.
No full textAt head of title: Ollivier-Beauregard.Mode of access: Internet
The relationships between organic farming and agroecology.
No full textWhile acknowledging an extension of agroecology in the organic sector and a growing influence of agroecology in the academic world, we explore their relationships. These relationships cannot be reduced to an opposition between a scientific field and a practical domain. A Brazilian case study based on the analysis of researchers and social actors trajectories exemplifies the diversity of existing relations, whether inclusive or exclusive. With a literature review, this allows characterising the specific attributes of both organic agriculture and agroecology. We discuss them in the light of current challenges for organic farming research and development
Aminobacterium
No full textInternational audienceA.min.o.bac'te.ri.um. N.L. n. aminum amine; Gr. dim. n. bakterion a small rod; N.L. neut. n. Aminobacterium the amino acid rod.Synergistetes / Incertae Sedis / Incertae Sedis / Incertae Sedis / AminobacteriumCells are strictly anaerobic, nonsporeforming, nonmotile or motile by means of one or two lateral flagella, slightly curved rods, occurring singly, in pairs, or, rarely, as chains. Gram‐stain‐negative. Mesophilic, neutrophilic. Heterotrophic, asaccharolytic. Growth by fermentation of a limited range of amino acids only in the presence of yeast extract.DNA G+C content (mol%): 44–46.Type species: Aminobacterium colombiense Baena, Fardeau, Labat, Ollivier, Thomas, Garcia and Patel 1 999c, 1325VP (Effective publication: Baena, Fardeau, Labat, Ollivier, Thomas, Garcia and Patel 1 998, 249.)
Caldanaerobacter
No full textInternational audienceCald.an.ae.ro.bac'ter. L. adj. caldus hot; Gr. pref. an not; Gr. n. aer air; N.L. masc. n. bacter equivalent of Gr. neut. dim. n. bakterion rod, staff; N.L. masc. n. Caldanaerobacter a rod that grows in the absence of air at high temperatures.Firmicutes / “Clostridia” / Thermoanaerobacterales / Thermoanaerobacteraceae / CaldanaerobacterCells are straight rods that stain Gram‐positive or negative. Endospores may be observed. Strictly anaerobic heterotrophs. Acetate and l ‐alanine are major end products of glucose fermentation, with approximately 1 mol of L‐alanine being produced per mol of glucose. Thermophilic member of the family Thermoanaerobacteraceae.DNA G+C content (mol%): 33–41.Type species: Caldanaerobacter subterraneus (Fardeau, Magot, Patel, Thomas, Garcia and Ollivier 2000) Fardeau, Bonilla‐Salinas, L'Haridon, Jeanthon, Verhé, Cayol, Patel and Garcia 2004, 471VP (Thermoanaerobacter subterraneus Fardeau, Magot, Patel, Thomas, Garcia and Ollivier 2000, 2145)
1.14 Palladium(I)-Mediated Reactions
No full textSeveral elegant reactivities can be observed in reactions involving palladium(I) species, allowing access to molecular architectures that are often beyond the capabilities of popular diamagnetic palladium complexes. This review presents three main axes of research in this context, which have mostly emerged in the last decade. Reactions promoted by visible light enable synthetic methods that are unusual in their mild experimental conditions coupled with remarkably broad functional group tolerance. The use of discrete palladium(I) dimers as precatalysts allows one to perform a wide set of cross-coupling protocols, such as Kumada and Negishi reactions, and chalcogenation reactions, with a surgical precision on the carbon—halogen bond that is initially activated. The generation of alkyl radicals and palladium(I) species through a thermal strategy proves useful for the elaboration of substrates with several polyfluorinated fragments, which are otherwise elusive coupling partners for more common two-electron processe
Bibliographie Hilarion G. Petzold 1958 – 2009 mit Anhang als Einführung
No full textDieses Archiv enthält die Gesamtbibliographie der Werke des Autors nebst einiger Texte „Über H. G. Petzold“ im Schlussteil der Bibliographie sowie einen Anhang mit einer Einführung in die Architektur des Werkes in seinem wissenslogischen Aufbau als Ausarbeitung seines „Tree of Science Modells“ (2007).This archive contains the complete bibliography of the author and some texts about H. G. Petzold, moreover an epilogue with an introduction to the architecture of the works in its epistemological structure and composition and as an elaborations of Petzold’s „Tree of Science Modell (2007).https://www.fpi-publikation.de/polyloge/01-2009-petzold-h-g-gesamtbibliographie-h-g-petzold-1958-2009-updating-november2009/peerReviewedpublishedVersio
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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