Search results for "HQ"
showing 6 items of 276 documents
Joint second-order parameter estimation for spatio-temporal log-Gaussian Cox processes
2018
We propose a new fitting method to estimate the set of second-order parameters for the class of homogeneous spatio-temporal log-Gaussian Cox point processes. With simulations, we show that the proposed minimum contrast procedure, based on the spatio-temporal pair correlation function, provides reliable estimates and we compare the results with the current available methods. Moreover, the proposed method can be used in the case of both separable and non-separable parametric specifications of the correlation function of the underlying Gaussian Random Field. We describe earthquake sequences comparing several Cox model specifications.
Il Belice prima e dopo il 1968 attraverso le iconografie
2014
Il saggio presenta come l' intero territorio della valle del Belice abbia cambiato identità dopo il terremoto del 1968. Attraverso le iconografie (fotografie, disegni) di architetture esistite e poi distrutte. The 1968 earthquake in western Sicily is a break point in the history of a territory rich and layered. The journalism has mainly dealt with the case Gibellina, but in reality is the entire geographical area to have changed relationships and vocations. The iconography and photographs can witness the difference that occurred within a few years. In fact, the contemporary architecture linked to the reconstruction is only one of the parameters suitable to interpret mutations identity of pl…
L'utilizzo del ferro a Palermo dopo il terremoto del 1726
2016
La ricerca, basata essenzialmente sullo studio di una consistente mole di documenti emersi attraverso nuove indagini archivistiche, mira a indagare gli aspetti tecnici legati agli interventi sul patrimonio architettonico di Palermo successivi al terremoto del 1726, approfondendo il ruolo degli architetti e dei maestri coinvolti nel processo di ricostruzione delle fabbriche colpite e ponendo particolare attenzione alle tecnologie messe in atto facenti ricorso all’uso ferro, indagate attraverso lo studio di alcuni casi esemplificativi. Questo materiale, infatti, trovò in questa occasione diverse applicazioni. L’intervento più frequente fu relativo all’inserimento di catene in ferro in corrisp…
Timber framed with masonry infill: a historical anti-seismic device. The Portuguese Pombaline gaiola.
2017
La ricostruzione postsismica e la prevenzione sismica sono stati da sempre un fondamento costruttivo.Questo studio analizza la tipologia costruttiva della gaiola pombalina, un sitema costruttivo e strutturale molto diffuso in Portogallo ma non solo, adottato a Lisbona a seguito del terremoto del 1755. Si analizzano i materiali e le tecniche costruttive, gli elementi utili al rinforzo e consolidamento della struttura muraria, ampiamente diffuso in area mediterranea a partire dal XVIII secolo.Questo sistema costruttivo può e deve anche oggi essere considerato un utile presidio antisismico da riconoscere e preservare da interventi incolti, se non addirittura da incongrue demolizioni. Post-seis…
Epilepsijas pacientu depresijas un trauksmes simptomu pašnovērtējums
2021
Ievads. Epilepsija ir saistīta ar paaugstinātu risku attīstīties tādiem psihiatriskiem traucējumiem kā depresija un trauksme. Šie traucējumi negatīvi ietekmē epilepsijas ārstēšanas rezultātus, dzīves kvalitāti, kā arī paaugstina pašnāvības risku. Tomēr tie joprojām netiek pietiekami atpazīti un ārstēti. Mērķis. Darba mērķis ir novērtēt depresijas un trauksmes simptomu sastopamību cilvēkiem ar epilepsiju, salīdzinot ar cilvēkiem, kuriem nav epilepsijas, balstoties uz simptomu pašnovērtējumu. Materiāli un metodes. Pētījums tika veikts Rīgas Austrumu klīniskajā universitātes slimnīcā 2020. gadā, un tajā iekļauts 21 pacients ar epilepsiju, 21 – bez epilepsijas. Dalībnieki aizpildīja simptomu pa…
A new picking algorithm based on the variance piecewise constant models
2022
AbstractIn this paper, we propose a novel picking algorithm for the automatic P- and S-waves onset time determination. Our algorithm is based on the variance piecewise constant models of the earthquake waveforms. The effectiveness and robustness of our picking algorithm are tested both on synthetic seismograms and real data. We simulate seismic events with different magnitudes (between 2 and 5) recorded at different epicentral distances (between 10 and 250 km). For the application to real data, we analyse waveforms from the seismic sequence of L’Aquila (Italy), in 2009. The obtained results are compared with those obtained by the application of the classic STA/LTA picking algorithm. Althoug…