Search results for "HQ"
showing 10 items of 276 documents
Static Properties of a Simulated Supercooled Polymer Melt: Structure Factors, Monomer Distributions Relative to the Center of Mass, and Triple Correl…
2004
We analyze structural and conformational properties in a simulated bead-spring model of a non-entangled, supercooled polymer melt. We explore the statics of the model via various structure factors, involving not only the monomers, but also the center of mass (CM). We find that the conformation of the chains and the CM-CM structure factor, which is well described by a recently proposed approximation [Krakoviack et al., Europhys. Lett. 58, 53 (2002)], remain essentially unchanged on cooling toward the critical glass transition temperature of mode-coupling theory. Spatial correlations between monomers on different chains, however, depend on temperature, albeit smoothly. This implies that the g…
Statistical Analysis of Macroseismic Data for a better Evaluation of Earthquakes Attenuation Laws
2020
In this work we propose a statistical approach, based on the joint analysis of macroseismic data of Italian seismic events of the last two centuries, with which we obtain simultaneously maximum likelihood estimates of attenuation laws and coordinates of hypocenters. Our first results encourage us to use in the future more complex models, with a larger number of historical earthquakes.
Fragmentation dynamics within shear bands--a model for aging tectonic faults?
2001
A numerical model for packing of fragmenting blocks in a shear band is introduced, and its dynamics is compared with that of a tectonic fault. The shear band undergoes a slow aging process in which the blocks are being grinded by the shear motion and the compression. The dynamics of the model have the same statistical characteristics as the seismic activity in faults. The characteristic magnitude distribution of earthquakes appears to result from frictional slips at small and medium magnitudes, and from fragmentation of blocks at the largest magnitudes. Aftershocks to large-magnitude earthquakes are local recombinations of the fragments before they reach a new quasi-static equilibrium. The …
Prevalence and determinants of post-traumatic stress disorder, anxiety and depression symptoms in street children survivors of the 2010 earthquake in…
2017
International audience; Working with street children and adolescents who lived through the 2010 earthquake in Port-au-Prince, this paper aims to assess the prevalence of symptoms of PTSD, anxiety and depression in relation to peritraumatic distress, and age, and to explore other risk factors and socio-demographic characteristics, four years after the events. Between March and June 2014, with a sample of 128 children and adolescents (120 boys and 8 girls) aged between 7 and 18, of an average age of 13.88 (SD = 2.15), all living on the streets of Port-au-Prince, we used the following scales: the Trauma Exposure (TE), the Life Events Subscale of the CAPS; the Peritraumatic Distress Inventory (…
Imatges del món i miralls literaris. L'escriptura metaficcional en l'obra de Carme Riera
2021
L'article proposa una anàlisi, com a eix vertebrador de la literatura de Carme Riera, dels elements que, a l'interior de la diègesi, giren l'atenció cap a la mateixa condició literària del text i cap als mecanismes de construcció i de funcionament que li són propis; és a dir, d'aquells elements que posen de manifest el caràcter ficcional de l’obra i mitjançant els quals s'hi planteja un pacte metaficcional. L'autoconsciència i l'autoreferencialitat del text metaficcional trenquen amb la il·lusió mimètica pròpia del pacte realista per a plantejar una reflexió sobre l'artifici dels sistemes de captació del real per part de la literatura, deixant al descobert els límits i els codis que regeixe…
Characterization of MEMS accelerometer self-noise by means of PSD and Allan Variance analysis
2017
In this paper, we have studied the sources of error of a low-cost 3-axis MEMS accelerometer by means of Power Spectral Density and Allan Variance techniques. These techniques were applied to the signals acquired from ten identical devices to characterize the variability of the sensor produced by the same manufacturer. Our analysis showed as identically produced accelerometer have somehow variable behavior in particular at low frequency. It is therefore of paramount importance before their use in Inertial Navigation or Earthquakes Monitoring System, a complete characterization of each single sensors.
Digital simulation of multivariate earthquake ground motions
2000
In this paper a new generation procedure of multivariate earthquake ground motion is presented. The technique takes full advantage of the decomposition of the power spectral density matrix by means of its eigenvectors. The application of the method to multivariate ground accelerations shows some very interesting physical properties which allows one to obtain significant reduction of the computational effort in the generation of sample functions relative to multivariate earthquake ground motion processes. Copyright © 2000 John Wiley & Sons, Ltd.
Submitting “Alternative Facts” to Debate: A Weberian Perspective on Post-truth Politics
2018
'Oxford Dictionaries' chose “post-truth” as the “Word of the Year 2016”, while the association of German linguists (Gesellschaft für deutsche Sprache) did the same for '“postfaktische Politik'”. “Alternative facts”, launched by Kellyanne Conway concerning the attendance at Donald Trump’s inaugural, was a third variant in this cluster. In this article, I shall discuss Max Weber’s parliamentary perspective on the critique of given facts and of the powers of science in relation to the debates around post-truth politics. A critical assessment of Leo Strauss’s critique of Weber as a nihilist and relativist introduces the problematic. One aim of the article is to illustrate how even trivial sloga…
Synthesis, characterization and thermal degradation of 8-hydroxyquinoline–guanidine–formaldehyde terpolymer
2007
Abstract Terpolymer (8-HQGF) has been synthesized using the monomers 8-hydroxyquinoline, guanidine, formaldehyde in 1:1:2 molar proportions. The structure of 8-HQGF terpolymer has been elucidated on the basis of elemental analysis and various physicochemical techniques, i.e. UV–Visible, FTIR–ATR and 1 H NMR spectroscopy. Detailed thermal degradation study of the new terpolymer has been carried out to ascertain its thermal stability. Thermal degradation curve is discussed which shows two decomposition steps (265–475 °C and 540–715 °C). Sharp–Wentworth and Freeman–Carroll methods have been used to calculate activation energies and thermal stability. The activation energy ( E a ) calculated by…
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…