Search results for "Rust"

Late Hercynian Plate and Intraplate Processes within Europe

1987

The Hercynian orogenic belt of Europe consists of a central crystalline ridge which is accompanied on both sides by a rather unmetamorphosed foldbelt. It is speculated that the crystalline ridge represents some kind of island arc system underlain by a segment of continental crust. On both sides this island arc system was involved in subduction of oceanic crust, first of the Mideuropean Sea in the North and then of the Paleotethys in the South. When the continental areas to the north and south of the oceanic areas (North America/Northern Europe and Africa) finally got involved in the subduction processes, continent/continent collision took place on both sides of the island arc system. The tw…

La voce, il gesto, la scena. Elementi teatrali nelle commedie latine del XII e XIII secolo

2019

In questo volume, dopo aver delineato un panorama organico delle cosiddette commedie latine elegiache del XII e XIII secolo, viene discussa l'antica questione della reale possibilità di rappresentare questi testi, cercando di mostrare - anche sulla base di alcune glosse di Arnolfo di Orléans e un'intera serie di spie e indizi interni dei testi stessi - come è ipotizzabile una rappresentazione teatrale, almeno per alcune di queste commedie. Gli argomenti qui trattati riguardano l'alternanza, nelle composizioni comico-elegiache, tra parti narrative e sezioni monologiche e / o dialogiche; le didascalie "interne"; possibili relazioni con la tradizione giullaresca; la convivenza, all'interno di …

Vie quotidienne et artisanat : la pars rustica de la villa de Beire-le-Châtel (Côte-d'Or)

2017

National audience

Jallerange (25), Groseliers, Sous les Meix, Nautrey, Le Parc de la Ferme. Du cimetière protohistorique à la villa antique : occupations de la vallée …

2011

Embedded access points for trusted data and resources access in HPC systems

2010

Biometric authentication systems represent a valid alternative to the conventional username-password based approach for user authentication. However, authentication systems composed of a biometric reader, a smartcard reader, and a networked workstation which perform user authentication via software algorithms have been found to be vulnerable in two areas: firstly in their communication channels between readers and workstation (communication attacks) and secondly through their processing algorithms and/or matching results overriding (replay attacks, confidentiality and integrity threats related to the stored information of the networked workstation). In this paper, a full hardware access poi…

V-Belt Winding along Archimedean Spirals During the Variator Speed Ratio Shift

2010

Starting from a previous model for the shift mechanics of rubber belt variators, this lecture elaborates practical design formulas for the torque and the axial thrust making use of the very close resemblance of the belt path to a linear spiral of Archimedes along a large part of the arc of contact. In addition, as an alternative to the modern calculus tools, it is shown how the drive variables can be equally calculated applying some propositions of Archimedes’ classical treatise πeρί ‘eλίκων (On Spirals).

Baltic Journal of Psychology; Volume 19, Number 1&2  

2019

Association between malocclusion and orofacial myofunctional disorders of pre‐school children in Latvia

2019

Objects Abnormal use of muscles of tongue and lips is called orofacial myofunctional disorders (OMD). In this study, we aimed to investigate the interrelation between occlusal findings and OMD in primary and mixed dentition and to find out the reasons for malocclusions, and the effect modification of these associations by the number of sources that parents used to receive the information on child oral health issues (NSI). Setting and sample population Cross-sectional study was performed in one kindergarten in Latvia (cluster sampling). The study sample comprised 141 children-mothers' pairs of pre-school children aged 4-7 years. Materials and methods Children' myofunctional situation, occlus…

Host searching in Argulus foliaceus L. (Crustacea: Branchiura): the role of vision and selectivity.

1998

In laboratory experiments, the swimming behaviour of the ectoparasite Argulus foliaceus and its infection rates on juvenile perch (Perca fluviatilis) and roach (Rutilus rutilus) were examined. The highest infection rate and a preference for perch juveniles were obtained in darkness, the lowest infection rate and a lack of preference in the light, when aquaria with glass walls (high reflectivity) were used. In the light, when aquaria were lined with black plastic (low reflectivity) an intermediate level of infection for perch and the highest for roach was recorded. Under such conditions roach were significantly more heavily infected than perch; an attack rate 4 times greater was recorded for…

Potassium-rich magmatism from a phlogopite-free source

2017

The generation of strongly potassic melts in the mantle is generally thought to require the presence of phlogopite in the melting assemblage. In the Mediterranean region, trace element and isotope compositions indicate that continental crustal material is involved in the generation of many potassium-rich lavas. This is clearest in ultrapotassic rocks like lamproites and shoshonites, for which the relevant chemical signals are less diluted by extensive melting of peridotite. Furthermore, melting occurs here in young lithosphere, so the continental crust was not stored for a long period of time in the mantle before reactivation. We have undertaken two types of experiments to investigate the r…