Search results for "SLI"

The weak and superfast Cretan detachment, Greece: exhumation at subduction rates in extruding wedges

2002

Low-angle normal faults (detachments) are only efficient agents for bringing rocks from 40–>100 km depth back to the Earth’s surface if they operate with extreme slip rates exceeding 20 km Ma −1 . Here we propose a slip rate of ≧20–30 km Ma −1 for the Cretan detachment in the Aegean, Greece. The Cretan detachment and the subjacent subduction thrust bounded an extruding wedge above the Miocene Hellenic subduction zone. During exhumation the high-pressure rocks in the wedge were not significantly deformed. Very low shear coupling at the bounding faults (which are therefore weak) is needed to prevent significant deformation in the extruding wedge. The proposed slip rate of ≧20–30 km Ma −1 is s…

Corrigendum: The quantum phase slip phenomenon in superconducting nanowires with a low-Ohmic environment

2013

Experimental limits of the observation of thermally activated phase-slip mechanism in superconducting nanowires

2007

The shape of experimentally observed $R(T)$ transition of thin superconducting wires is analyzed. From theoretical point of view, broadening of the transition in quasi-one-dimensional superconducting channels is typically associated with phase-slip mechanism. It is shown that such interpretation can be misleading if to consider geometrical inhomogeneity and finite dimensions of real samples studied in experiments. The analysis is based on experimental fact that for many superconducting materials the critical temperature depends on the characteristic dimension of a sample: film thickness or wire cross section.

Phase Slip Phenomena in Ultra-Thin Superconducting Wires

2006

We present results on phase-slip phenomena in a superconducting wire which can be considered as quasi-one dimensional (1D) if its characteristic transverse dimension \( \sqrt \sigma\) (√ being the cross section) is smaller than the coherence length Λ(T). The shape of the bottom part of the resistive transition R(T) of a 1D superconducting strip is described by the model of phase slips activation. If the wire is infinitely long, then there is always a finite probability that a small part of the sample is instantly driven normal.

A sliding mode approach to robust stabilisation of Markovian jump linear time-delay systems with generally incomplete transition rates

2015

Abstract This paper is devoted to investigating the problem of robust sliding mode control for a class of uncertain Markovian jump linear time-delay systems with generally uncertain transition rates (GUTRs). In this GUTR model, each transition rate can be completely unknown or only its estimate value is known. By making use of linear matrix inequalities technique, sufficient conditions are presented to derive the linear switching surface and guarantee the stochastic stability of sliding mode dynamics. A sliding mode control law is developed to drive the state trajectory of the closed-loop system to the specified linear switching surface in a finite-time interval in spite of the existing unc…

H∞ sliding mode control for uncertain neutral-type stochastic systems with Markovian jumping parameters

2015

This paper is devoted to the investigation of H ∞ sliding mode control (SMC) for uncertain neutral stochastic systems with Markovian jumping parameters and time-varying delays. A sliding surface functional is firstly constructed. Then, the sliding mode control law is designed to guarantee the reachability of the sliding surface in a finite-time interval. The sufficient conditions for asymptotically stochastic stability of sliding mode dynamics with a given disturbance attenuation level are presented in terms of linear matrix inequalities (LMIs). Finally, an example is provided to illustrate the efficiency of the proposed method.

About Objective 3-D Analysis of Airway Geometry in Computerized Tomography

2008

The technology of multislice X-ray computed tomography (MSCT) provides volume data sets with approximately isotropic resolution, which permits a noninvasive 3-D measurement and quantification of airway geometry. In different diseases, like emphysema, chronic obstructive pulmonary disease (COPD), or cystic fribrosis, changes in lung parenchyma are associated with an increase in airway wall thickness. In this paper, we describe an objective measuring method of the airway geometry in the 3-D space. The limited spatial resolution of clinical CT scanners in comparison to thin structures like airway walls causes difficulties in the measurement of the density and the thickness of these structures.…

Preliminary results of a geomorphological and DInSAR characterization of a recently identified Deep-Seated Gravitational Slope Deformation in Sicily …

2019

The study is part of a larger project that involves the analysis of recently identified Deep-Seated Gravitational Slope Deformation (DSGSD) in Sicily which have been sub-divided according to the geological framework in light of the new geological data about the regional setting. Here are presented the first results of a multidisciplinary study of a DSGSD recently identify in Mount San Calogero area (Northern Sicily). The study was performed by means of different approaches including conventional methods (field surveys) and the Differential Interferometry Synthetic Aperture Radar (DInSAR) technique. The geological and geomorphological analyses were carried out to investigate slopes dynamic, …

Hronisku sāpju terapeitiskie un diagnostiskie aspekti Tukuma slimnīcā

2020

Diplomdarba tēma - Hronisku sāpju terapeitiskie un diagnostiskie aspekti Tukuma slimnīcā. Tēmas aktualitāti nosaka hronisku sāpju biežā izplatība, kas, pieaugot iedzīvotāju labklājības līmenim, nesamazinās, un, hroniskas sāpes kļūst par vienu no biežākajiem invaliditātes iemesliem attīstītajās valstīs. Pētījuma mērķis – noskaidrot biežākos hronisku sāpju iemeslus, to pacientu vidū, kuri griežas pēc palīdzības SIA “Tukuma slimnīca”. Hroniskas sāpes ir izplatīts, taču komplekss stāvoklis un to ārstēšana joprojām nav pilnībā izprasta. Viens no pētījuma mērķiem tika noteikts apzināt, kādu pretsāpju terapiju pielieto pētījuma bāzē, kā arī veicot literatūras apskatu, salīdzināt to ar vadlīnijās r…

Tiopurīna metiltransferāzes fenotipa analīze pacientiem ar iekaisīgām zarnu slimībām

2018

Lai izvērtētu pacientu atbilstību tiopurīnu grupas medikamentu terapijai, ir iespējams veikt TPMT aktivitāti novērtējošas analīzes. Pētījuma mērķis ir pētīt Latvijā jaunas laboratoriskās diagnostikas metodes - tiopurīna metiltransferāzes aktivitātes noteikšanas asinīs – pielietošanas iespējas un nepieciešamību pacientiem ar iekaisīgām zarnu slimībām, kuri stacionēti Paula Stradiņa Klīniskās universitātes slimnīcā. Izvirzīta hipotēze, ka aptuveni 3-14% pacientu pētījumu grupā varētu būt samazināta TPMT aktivitāte. Pētījumā iekļauti dati par astoņiem pacientiem, kas ir vecāki par 18 gadiem un no kuriem 40% ir sievietes (n=3) un 60% vīrieši (n=5). Rezultāti: No astoņiem darbā iekļautajiem paci…