Search results for "Opera"

Parametric and nonparametric A-Laplace problems: Existence of solutions and asymptotic analysis

2021

We give sufficient conditions for the existence of weak solutions to quasilinear elliptic Dirichlet problem driven by the A-Laplace operator in a bounded domain Ω. The techniques, based on a variant of the symmetric mountain pass theorem, exploit variational methods. We also provide information about the asymptotic behavior of the solutions as a suitable parameter goes to 0 + . In this case, we point out the existence of a blow-up phenomenon. The analysis developed in this paper extends and complements various qualitative and asymptotic properties for some cases described by homogeneous differential operators.

Sociedades fragiles

2001

Kardiovaskulārā riska izvērtējums ar FFR-CT metodi pacientiem ar perifēro artēriju oklizīvu slimību perioperatīvajā periodā

2018

Ievads. Perifēro artēriju okluzīva slimība (PAOS) ir aterosklerotiska saslimšana, kas raksturojas ar vienas vai vairāku perifēro artēriju stenozi vai oklūziju. Kopīgie riska faktori PAOS un koronāro artēriju slimībai (KAS) rezultējas ar to, ka pacientiem ar PAOS ir lielāka KAS incidence, kā arī risks jauniem koronāriem notikumiem. PAOS pacientu mirstība koronāro notikumu dēļ ir 6,6 reizes lielāka nekā pacientiem bez šīs slimības (Duran et al., 2010). Frakcionētās plūsmas rezerves aprēķināšana izmantojot datortomogrāfijas angiogrāfiju (FFRCT) ir metode, kas ļauj neinvazīvi izmeklēt vainagartērijas un diagnosticēt hemodinamiski nozīmīgas stenozes. Metodes un materiāli. PSKUS prospektīvā pētīj…

The realization of autonomous, aircraft-based, real-time aerosol mass spectrometry in the upper troposphere and lower stratosphere

2022

Abstract. We report on the developments that enabled the field deployment of a fully-automated aerosol mass spectrometer, specially designed for high-altitude measurements on unpressurised aircraft. The merits of the two main categories of real-time aerosol mass spectrometry, i.e. (a) single particle laser desorption and ionization, and (b) continuous thermal desorption / electron impact ionization of aerosols, have been integrated into one compact apparatus with the aim to perform in-situ real-time analysis of aerosol chemical composition. The demonstrated instrument, named ERICA (European Research council Instrument for the Chemical composition of Aerosols), operated successfully aboard t…

Adapting rail and road networks to weather extremes: Case studies for southern Germany and Austria

2013

Published version of an article in the journal: Natural Hazards. Also available from the publisher at: http://dx.doi.org/10.1007/s11069-013-0969-3 The assessment of the current impacts of extreme weather conditions on transport systems reveals high costs in specific locations. Prominent examples for Europe are the economic consequences of the harsh winter periods 2009/2010 and 2010/2011 and the floods in Austria, Eastern Europe, Germany and the United Kingdom in 2005 and 2007. Departing from the EC-funded project WEATHER, this paper delves into the subject of adaptation strategies by revisiting the project’s general findings on adaptation strategies and by adding two specific cases: (1) adv…

Operational forecasting of daily summer maximum and minimum temperatures in the Valencia Region

2013

Extreme-temperature events have a great impact on human society. Thus, knowledge of summer temperatures can be very useful both for the general public and for organizations whose workers operate in the open. An accurate forecasting of summer maximum and minimum temperatures could help to predict heatwave conditions and permit the implementation of strategies aimed at minimizing the negative effects that high temperatures have on human health. The objective of this work is to evaluate the skill of the regional atmospheric and modelling system (RAMS) model in determining daily summer maximum and minimum temperatures in the Valencia Region. For this, we have used the real-time configuration of…

Introduction to the Special Section on Temporal Change Observation for Bio-Geophysical Parameters

2011

The nine papers in this special section are contributions from the AgriSAR-2006 Campaign Workshop, held at ESA-ESTEC, Noordwijk, The Netherlands, in October 2008.

IWAL–An Interactive Weather Analysis Laboratory

2015

Abstract Complementary key elements of meteorological education are the provision of a thorough theoretical understanding of the physical laws governing atmospheric motions, and the hands-on investigation and visualization of specific weather systems. However, the latter task is technically challenging, because specific skills must be acquired for flexibly handling meteorological data. Some examples are superimposing satellite pictures and reanalysis fields, producing an isentropic potential vorticity (PV) map, and visualizing a vertical section across a flow feature of interest. Although learning these technical issues has its own merits, it can distract students from investigating the com…

The effects of histamine on the isolated mouse uterus

2000

1. A study is made of the contractile and relaxant effects, and mechanism of action, of histamine on isolated uterus from mice treated with diethylstilboestrol, employing acetylcholine and adrenaline as contractile and relaxant standard agents. 2. Concentration-response curves for histamine agonists were obtained in the absence and presence of selective histaminergic blocking drugs (clemizole, ranitidine and thioperamide) and indomethacin. A number of experiments were carried out in uterus from reserpinised mice. Concentration-response curves for acetylcholine and adrenaline were also obtained in the absence and presence of their selective antagonist (atropine and propranolol). 3. In isolat…

Taking part in Nordic collaboration : nursing students' experiences and perceptions from a learning perspective: a qualitative study

2015

BACKGROUND: Nordic networking of different kinds has a long tradition aiming to increase collaboration and understanding between citizens in different countries. Cultural competence in relation to health care and nursing is important for clinical nurses and is a central issue in nurse education. OBJECTIVE: To gain an understanding of what nurse students experienced and learned during an intensive course in diabetes together with students and nurse educators from Denmark, Finland, Iceland, Norway, Sweden and the Faroe Islands. METHODS: In 2012, an intensive course within the Nordic network, Nordkvist, was conducted in Faroe Islands with the theme "Nursing - to live a good life with diabetes"…