Search results for "Critical time"
showing 4 items of 4 documents
Guideline-adherence regarding critical time intervals in the German Chest Pain Unit registry
2020
Background: Since 2008, the German Cardiac Society certified 256 Chest Pain Units (CPUs). Little is known about adherence to recommended performance measures in patients with suspected acute coronary syndrome (ACS) presenting to CPUs. We investigated guideline-adherence regarding critical time intervals and selected performance measures in German Chest Pain Units. Methods: From 2008 to 2014, 23,804 consecutive patients with suspected ACS were prospectively enrolled in the Chest Pain Unit registry of the German Cardiac Society. Results: Median time from symptom onset to first medical contact was 2 h in patients with ST-elevation myocardial infarction (STEMI) and 4 h in patients with unstable…
Numerical Study of the semiclassical limit of the Davey-Stewartson II equations
2014
We present the first detailed numerical study of the semiclassical limit of the Davey–Stewartson II equations both for the focusing and the defocusing variant. We concentrate on rapidly decreasing initial data with a single hump. The formal limit of these equations for vanishing semiclassical parameter , the semiclassical equations, is numerically integrated up to the formation of a shock. The use of parallelized algorithms allows one to determine the critical time tc and the critical solution for these 2 + 1-dimensional shocks. It is shown that the solutions generically break in isolated points similarly to the case of the 1 + 1-dimensional cubic nonlinear Schrodinger equation, i.e., cubic…
Permanenze e innovazioni nell'architettura del MediterraneoMediterranean Architecture between Heritage and Innovation
2011
Il volume offre numerosi spunti sul tema Permanenze e innovazioni nell'architettura del Mediterraneo, dimostrandone l'ampiezza di aspetti riconducibili alla Tecnologia dell'architettura, di cui si evidenzia la flessibilita dei confini disciplinari con riferimento ai diversi significati assumibili dal concetto di risorsa. Letta in continuita con le precedenti pubblicazioni Osdotta, questa consente di seguire quanto si va sviluppando nel terzo livello di formazione in un momento particolarmente critico per l'istituzione universitaria, continuando a porre l'accento sul nodo domanda/offerta di ricerca, nel confronto con altre istituzioni e con il mondo della produzione di settore, nell'attuale …
Reliability Estimation of Optimal Viscoelastic Composite Shells in Critical-Time Calculations
2003
The problem of reliability estimation for optimal viscoelastic composite shells in critical-time calculations is considered. The weight minimization of a viscoelastic composite shell, with constraints on deflections at the critical time, leads to a system deforming unstably, whose deflections grow in time with an increasing rate. A method for estimating the reliability of such shells in calculating the critical time is discussed. This time is regarded as a random variable depending on many, roughly equivalent, factors. An analysis of the reliability is carried out for different values of coefficients of variation, occurring in practice.