Search results for "AHA"
showing 10 items of 1702 documents
Depolarization�ratio profiling at several wavelengths in pure Saharan dust during SAMUM 2006
2009
Vertical profiles of the linear particle depolarization ratio of pure dust clouds were measured during the Saharan Mineral Dust Experiment (SAMUM) at Ouarzazate, Morocco (30.9°N, –6.9°E), close to source regions in May–June 2006, with four lidar systems at four wavelengths (355, 532, 710 and 1064 nm). The intercomparison of the lidar systems is accompanied by a discussion of the different calibration methods, including a new, advanced method, and a detailed error analysis. Over the whole SAMUM periode pure dust layers show a mean linear particle depolarization ratio at 532 nm of 0.31, in the range between 0.27 and 0.35, with a mean Ångström exponent (AE, 440–870 nm) of 0.18 (range 0.04–0.34…
Regional Saharan dust modelling during the SAMUM 2006 campaign
2011
The regional dust model system LM-MUSCAT-DES was developed in the framework of the SAMUM project. Using the unique comprehensive data set of near-source dust properties during the 2006 SAMUM field campaign, the performance of the model system is evaluated for two time periods in May and June 2006. Dust optical thicknesses, number size distributions and the position of the maximum dust extinction in the vertical profiles agree well with the observations. However, the spatio-temporal evolution of the dust plumes is not always reproduced due to inaccuracies in the dust source placement by the model. While simulated winds and dust distributions are well matched for dust events caused by dry syn…
Extreme, wintertime Saharan dust intrusion in the Iberian Peninsula: Lidar monitoring and evaluation of dust forecast models during the February 2017…
2019
The research leading to these results has received funding from the H2020 program from the European Union (grant agreement no. 654109, 778349) and also from the Spanish Ministry of Industry, Economy and Competitiviness (MINECO, ref. CGL2013-45410-R, CGL2016-81092-R, CGL2017-85344-R, TEC2015-63832-P), the Spanish Ministry of Science, Innovation and Universities (ref. CGL2017-90884-REDT); the CommSensLab "Maria de Maeztu" Unity of Excellence (ref. MDM-2016-0600) financed by the Spanish Agencia Estatal de Investigación. Co-funding was also provided by the European Union through the European Regional Development Fund (ref. POCI-01-0145-FEDER-007690, ALT20-03-0145-FEDER-000004, ALT20-03-0145-FED…
Spectral surface albedo over Morocco and its impact on radiative forcing of Saharan dust
2011
In May–June 2006, airborne and ground-based solar (0.3–2.2 μm) and thermal infrared (4–42 μm) radiation measurements have been performed in Morocco within the Saharan Mineral Dust Experiment (SAMUM). Upwelling and downwelling solar irradiances have been measured using the Spectral Modular Airborne Radiation Measurement System (SMART)-Albedometer. With these data, the areal spectral surface albedo for typical surface types in southeastern Morocco was derived from airborne measurements for the first time. The results are compared to the surface albedo retrieved from collocated satellite measurements, and partly considerable deviations are observed. Using measured surface and atmospheric prope…
LogDet divergence-based metric learning with triplet constraints and its applications.
2014
How to select and weigh features has always been a difficult problem in many image processing and pattern recognition applications. A data-dependent distance measure can address this problem to a certain extent, and therefore an accurate and efficient metric learning becomes necessary. In this paper, we propose a LogDet divergence-based metric learning with triplet constraints (LDMLT) approach, which can learn Mahalanobis distance metric accurately and efficiently. First of all, we demonstrate the good properties of triplet constraints and apply it in LogDet divergence-based metric learning model. Then, to deal with high-dimensional data, we apply a compressed representation method to learn…
Protocol for developing a mental imagery intervention: a randomised controlled trial testing a novel implementation imagery e-health intervention to …
2019
IntroductionDrowning due to driving into floodwater accounts for a significant proportion of all deaths by drowning. Despite awareness campaigns such as 'If it's flooded, forget it', people continue to drive into floodwater. This causes loss of life, risk to rescuers and damage to vehicles. The aim of this study was to develop and evaluate an online e-health intervention to promote safe driving behaviour during flood events.Methods and analysisThe study will use a 2×3 randomised controlled trial in which participants are randomised into one of two conditions: (1) education about the risks of driving into floodwater or (2) education about the risks of driving into floodwater plus a theory-ba…
Vanhempien merkitys yläkoululaisten liikunta-aktiivisuuteen
2012
Rahoitusmarkkinainformaatio BRIC-maiden laajennetussa Taylorin säännössä
2017
Tutkielmassa tarkastellaan BRIC-maiden harjoittamaa rahapolitiikkaa vuosina 2005-2015. Tutkielman päämääränä on selvittää, ovatko keskuspankit reagoineet rahapolitiikallaan inflaation ja tuotantokuilun lisäksi myös rahoitusmarkkinainformaatioon. Aineistona on käytetty reaaliaikaista aineistoa inflaation ja tuotantokuilun osalta. Rahoitusmarkkinainformaatiolla tarkoitetaan tutkielmassa kohdemaan valuuttakurssia ja keskimääräistä osinkotuottoa. Rahapolitiikkaa on arvioitu sekä sen hetkisten että eteenpäin katsovien Taylorin sääntöjen avulla. Rahoitusmarkkinainformaation roolia on tutkittu estimoimalla erilaisia rahoitusmarkkinainformaatiolla laajennettuja Taylorin sääntöjä ja arvioimalla laaj…
: The Place of the State in Africa according to the World Bank : limits of a neo-liberal policy
2005
This contribution aims to analyse the change in discourse held by the World Bank concerning the reform of the State in Africa in the educational sphere. After inspection, it emerges that despite new discourses on the "fight against poverty", the World Bank's neo-liberal policy still grants the State a minor role in the design and execution of educational policies. One would have thought of an evolution from the strict structural adjustment policies towards a policy of social adjustment where fundamental assets concerning the social field would be taken into account. That is not the case : the fight against poverty policy maintains the course of adjustment policies, by preserving a minimal s…
La Place de l'Etat en Afrique selon la Banque mondiale : De l'ajustement structurel à l'ajustement social. Les limites d'une politique néo-libérale «…
2007
07003 - 17 p.; Les Documents de travail de l'IREDU 2007/3; Cette contribution a pour objectif d'analyser le changement de discours que porte la Banque mondiale sur la réforme de l'État en Afrique, et ce dans la sphère éducative. Après examen, il ressort que malgré les nouveaux discours de « lutte contre la pauvreté », la politique néo-libérale de la Banque mondiale accorde à l'État une place toujours aussi mineure dans la conception et l'exécution des politiques éducatives. On aurait pu croire à la réalité d'une évolution de la politique d'ajustement structurel stricte vers une politique d'ajustement social où des acquis fondamentaux seraient pris en compte concernant le domaine social. Il …