Search results for "Elastic"
showing 10 items of 2162 documents
Elastic Geobarometry for Anisotropic Inclusions in Anisotropic Host Minerals: Quartz-in-Zircon
2021
Current models for elastic geobarometry have been developed with the assumption that the host and/or inclusion minerals are elastically isotropic. This assumption has limited applications of elastic thermobarometry to mineral inclusions contained in cubic quasi-isotropic host minerals (e.g., garnet). Here, we report a new elastic model that takes into account the anisotropic elastic properties and relative crystallographic orientation (RCO) of a host-inclusion system where both minerals are noncubic. This anisotropic elastic model can be used for host-inclusion elastic thermobarometric calculations provided that the RCO and elastic properties of both the host and inclusion are known. We the…
Anomāliju noteikšana ELK Stack
2020
Ingas Kauliņas maģistra darba mērķis ir izpētīt ELK stack un Elastic SIEM uzbūvi un komponentes, veikt to salīdzinājumu ar citiem risinājumiem SIEM darbību veikšanai un izveidot ZZDats piemērotu risinājumu anomāliju noteikšanai ELK stack, ko varētu pielietot SIEM funkciju veikšanā. Mērķa sasniegšanai tika izpētītas dokumentācijas Elastic produkiem, dokumentācija Humio sistēmai, padziļinātāk aplūkota anomāliju noteikšana, Elastic SIEM, Humio, Oracle shēmā un mašīnmācīšanās pielietošana anomāliju noteikšanā, kā arī veikti secinājumi par izstrādātā risinājuma sniegtajām priekšrocībām. Darba gaitā, padziļinātāk pētot anomāliju noteikšanu izvēlētajās sistēmās, autore saskārās gan ar plusiem gan …
Search for low-energy neutrinos from astrophysical sources with Borexino
2019
We report on searches for neutrinos and antineutrinos from astrophysical sources performed with the Borexino detector at the Laboratori Nazionali del Gran Sasso in Italy. Electron antineutrinos ($\bar{\nu}_e$) are detected in an organic liquid scintillator through the inverse $\beta$-decay reaction. In the present work we set model-independent upper limits in the energy range 1.8-16.8 MeV on neutrino fluxes from unknown sources that improve our previous results, on average, by a factor 2.5. Using the same data set, we first obtain experimental constraints on the diffuse supernova $\bar{\nu}_e$ fluxes in the previously unexplored region below 8 MeV. A search for $\bar{\nu}_e$ in the solar ne…
Accuracy of Transient Elastography in Assessing Fibrosis at Diagnosis in Naïve Patients With Primary Biliary Cholangitis: A Dual Cut-Off Approach
2021
Background & aims Liver fibrosis holds a relevant prognostic meaning in primary biliary cholangitis (PBC). Non-invasive fibrosis evaluation using vibration-controlled transient elastography (VCTE) is routinely performed. However, there is limited evidence on its accuracy at diagnosis in PBC. We aimed to estimate the diagnostic accuracy of VCTE in assessing advanced fibrosis at disease presentation in PBC. Approach & results We collected data from 167 consecutive treatment-naive PBC patients who underwent liver biopsy(LB) at diagnosis at six Italian centers. VCTE examinations were completed within 12 weeks of LB. Biopsies were scored by two blinded expert pathologists, according to Ludwig sy…
Force measurements and tip shape approximation with the atomic force microscope
2011
The Atomic Force Microscope (AFM) is an instrument with huge impact on modern research in the nanosciences and in nanotechnology. In AFM, a tip which is sharp on a scale of nanometers or tens of nanometers, is scanning along the surface which is imaged. A few among the large numbers of factors that potentially affect the interaction between the tip and the surface were studied in the experimental work that form this Thesis. Friction and elasticity measurements with AFM and the approximation of the tip shape are discussed. Also the contribution of the imaging environment is studied. A commercial AFM was modified into a so called environmental-AFM (env- AFM) , where the imaging conditions, su…
A thermoelastic instability problem for axially moving plates
2016
Problems of stability and deformation of a moving web, traveling between a system of rollers at a constant velocity are considered. The plate is subjected to a combined thermomechanical loading, including pure mechanical in-plane tension and also centripetal forces. Thermal strains corresponding to thermal tension and bending of the plate are accounted for. The problem of out-of-plane thermomechanical divergence (buckling) is reduced to an eigenvalue problem, which is studied analytically.
Apunts de teoria d'introducció a l'economia
2013
Aquest material ha rebut un dels incentius de la convocatoria 2013 per a la qualitat en l'elaboració de materials docents del Servei de Política Lingüística de la Universitat de València. Apunts de teoría de l'assignatura "Introducció a l'economia" dins dels estudis de grau en Administració i Direcció d'Empreses. Temari: 1) Princips bàsics d'economia. 2) La demanda i l'oferta. 3) L'elasticitat i la seua aplicación. 4) L'oferta, la demanda i les polítiques del govern. 5) Els mercats i el benestar. 6) Introducció a la funció de producción i els mercats de factors. 7) Introducció: conceptes bàsics de comptabilitat nacionsl. 8) Els determinants de la producción agregada a llarg termini. 9) Rend…
Problemes i aplicacions d'Introducció a l'Economia
2014
El document forma part dels materials docents programats mitjançant l'ajut del Servei de Política Lingüística de la Universitat de València. Problemes i aplicacions de l'assignatura "Introducció a l'Economia" dins del estudis de grau en Administració i Direcció d'Empreses. Temari: 1) Principis bàsics d'Economia, 2) La demanda i l'oferta, 3) L'elasticitat i la seua aplicació, 4) L'oferta, la demanda i les polítiques del govern, 5) Els mercats i el benestar, 6) Introducció a la funció de producció i els mercats de factors, 7) Introducció: Conceptes bàsics de comptabilitat nacional, 8) Els determinants de la producció agregada a llarg termini, 9) Renda i despesa: l'estalvi, la inversió i els f…
Energy metabolism and metabolic rate of the alder leaf beetle Agelastica alni (L.) (Coleoptera, Chrysomelidae) under aerobic and anaerobic conditions…
2003
In early fall, adult alder leaf beetles (Agelastica alni L.) retreat, for overwintering, to the top layer of the soil near their forage trees where the ground gets easily waterlogged so that the beetles will be submerged and cut off from atmospheric oxygen. Hence, unlike most other adult insects, alder leaf beetles encounter hypoxia/anoxia in their natural habitat and this may occur at moderate temperature. Exposing beetles to pure nitrogen gas at 20 degrees C had similar behavioral and metabolic effects as submerging them in water, causing rapid immobility and increasing the content of lactate about sevenfold to some 5mgr;molg(-1) body weight during 10h anoxia. Recovery from 10 h hypoxia/a…
Modeling of the viscoelastic behavior of paving bitumen using fractional derivatives
2009
The paving grade bitumen used in the production of asphalt mixtures for road construction is significantly able to affect the in-service performances of flexible road pavements. It has been proved that, when subjected to loading conditions comparable with most pavement operating conditions, bituminous binders behave as linear visco-elastic materials. The aim of this paper is to propose a model based on fractional differential equations which is able to describe the behavior of bituminous binders in the linear viscoelastic range. Shear creep testing and creep recovery testing were carried out over a range of temperatures and by applying a stress level which makes it possible to maintain the …