830 research outputs found
Eradicate Invasive Louisiana Red Swamp and Preserve Native white Clawed Crayfish in Friuli Venezia Giulia
No full textTop-down and Bottom-up coupling effects of subsidy on recipient ecosystem
No full textR Codes related to S. E. Osakpolor, A. Manfrin, S. J. Leroux, R. B. Schäfer, A. M. McLeod. Top-down and Bottom-up coupling effects of subsidy on recipient ecosystem.</p
Notes on a paper of Pokhozhaev
No full textWe prove a second order identity for the Kirchhoff equation which yields, in
particular, a simple and direct proof of Pokhozhaev's second order conservation
law when the nonlinearity has the special form . As
applications, we give: an estimate of order for the lifespan
of the solution of the Cauchy problem with initial data of size
in Sobolev spaces when the nonlinearity is given by any
function ; a necessary and sufficient condition for boundedness of a
second order energy of the solutions.Comment: 7 page
Top-down and Bottom-up coupling effects of subsidy on recipient ecosystem
No full text R Codes related to S. E. Osakpolor, A. Manfrin, S. J. Leroux, R. B. Schäfer, A. M. McLeod. Top-down and Bottom-up coupling effects of subsidy on recipient ecosystem. </p
Il cavallo nella protostoria dell’Italia settentrionale: aspetti archeozoologici e storico-culturali
No full textIl presente contributo propone una panoramica, condotta sull’edito, sui resti di cavallo
attestati in Italia settentrionale dall’antica Età del Bronzo alla romanizzazione. Come noto,
il cavallo ha rivestito un ruolo di grande rilievo nelle società antiche. Manca tuttavia un
lavoro di sintesi aggiornato che analizzi gli aspetti archeozoologici e storico-culturali dei
cavalli protostorici del Nord Italia. In relazione a questo, gli obiettivi dell’intervento sono
principalmente tre: individuare una o più possibili direttrici attraverso cui il cavallo è stato
introdotto in Italia settentrionale, confermando anche, possibilmente, le ipotesi formulate
finora circa la cronologia effettiva della sua introduzione; comprenderne le implicazioni
socio-economiche e ideologiche; eseguire una stima delle variazioni dimensionali dei
cavalli provenienti dai siti esaminati per tentare di distinguere possibili differenze e/o
affinità tra i diversi comparti geografici e culturali nel corso del tempo. Nel primo step
della ricerca la raccolta dei dati ha permesso la creazione di un database, funzionale alla
successiva elaborazione di carte di distribuzione (GIS) delle attestazioni dei resti equini
nell’area esaminata. Lo studio è poi proseguito con l’analisi delle altezze al garrese, ipotizzando quelle non note attraverso confronti osteometrici di determinati elementi anatomici. I risultati ottenuti permettono, sia pure con le necessarie cautele dovute allo stato
dei rinvenimenti, di delineare un quadro aggiornato sulla presenza del cavallo in Nord
Italia sotto vari punti di vista.This contribution aims to provide an overview of the published horse remains
attested in Northern Italy from the ancient Bronze Age to Romanization. As is known, the
horse played a significant role in ancient societies. However, there is a lack of updated
synthesis work that analyses the zooarchaeological and cultural-historical aspects of
protohistoric horses in Northern Italy. Given this background, the objectives of the intervention are primarily threefold: to identify one or more possible directions through
which the horse was introduced to Northern Italy, also confirming, if possible, the hypotheses published so far regarding the chronology of its introduction; to understand
its socio-economic and ideological implications; to carry out an estimation of the size
variations of horses from the examined sites in an attempt to distinguish possible differences and/or affinities between different geographical and cultural compartments over
time. The first step of the research involved data collection, which allowed the creation
of a database, functional for the subsequent elaboration of distribution maps (GIS) of
horse remains in the examined area. The study then continued with the analysis of withers heights, assuming those not known through osteometric comparisons of selected
anatomical elements. The results obtained make it possible, albeit with caution due to
the state of the findings, to outline an updated overview of the presence of the horse in
Northern Italy from various points of view
Middle triassic ammonoid fauna from the recoaro and tretto areas (NE Italy) and its stratigraphic and paleobiogeographic evidence
No full textBetween the mid 19th and the beginning of the 20th centuries, several Austrian and German geologists such as Beyrich, Mojsisovics and Tornquist, studied the geology of the Recoaro area (NE Italy). They described important ammonoid faunas, the majority being collected from a stratigraphic unit known as the Nodosus Formation.
Among these faunas are problematic species that have been the focus of long discussion both from a biostratigraphic and taxonomic point of view. Unfortunately, most of the historical material has been either destroyed or lost, and recent studies in the field provided only a few scarce specimens thus making taxonomic revision difficult. One of the unresolved issues is related to the possible occurrence of the ceratitids peculiar to the Upper Muschelkalk of the Central Europa (Germanic) Basin and the Sephardic Triassic province among the Alpine ammonoids. An unexpected discovery of an old ammonoid collection stored at the Museo Geologico e Paleontologico of Padova University (MGP-PD) permitted confirmation of the presence of a distinctive ammonoid species Alloceratites tornquisti (Philippi) within the Triassic Recoaro domain. Two other species of Alloceratites have also been found in the Val Gola section near Trento. These occurrences are significant taxonomically, biostratigraphically and in relation to Middle Triassic sequence stratigraphy
I manufatti in materia dura animale
No full textIl Capitolo riassume le informazioni che riguardano i manufatti realizzati in materia dura animale, sui reperti
semifiniti e i relativi scarti di lavorazione, in parte compatibili col contesto tecnico metallurgico in esame (per
esempio, come manici di coltelli). Presentiamo un totale di 26 reperti provenienti dagli scavi P.ET.R.A., più
altri 10 rinvenuti durante il micro-scavo del blocco in laboratorio, accompagnati da una serie di scarti/schegge
di lavorazione di dimensioni limitate (inferiori ai 5 cm), alcune delle quali sembrano il frutto di operazioni
di taglio modulare. La maggior parte dei resti lavorati sono realizzati in palco di cervo. Sono presenti,
come materie prime, anche cavicchie ossee di capra e bovino ed elementi post-craniali di bovino e cavallo.The Chapter summarises the information regarding artefacts made from animal hard material, the semi-finished
finds and the associated processing scraps, some of which are compatible with the technical metallurgical context
under investigation (e.g. as knife handles). We present a total of 26 finds from the P.ET.R.A. excavations, plus a
further 10 artefacts found during the micro-excavation of the block in the workshop, accompanied by a series of
minor (less than 5 cm) processing waste pieces, some of which appear to be the result of modular cutting operations.
Most of the processed remains are made of deer antler. Bony cavicles of goat and cattle and post-cranial elements of
cattle and horse are also present as raw materials
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