Search results for "FLE"
showing 10 items of 3517 documents
Antimicrobial activity of the extracts of Terfezia claveryi and Tirmania pinoyi against gram-positive and gram-negative bacteria causal agent of dise…
2017
Tomato diseases caused by virus, bacteria and fungi have been reported worldwide and caused considerable economic losses. Among all diseases, attention is paid to those caused by bacteria. In this study, the extracts of two “desert truffles” Terfezia claveryi and Tirmania pinoyi were tested against six bacterial species, causal agent of economically important tomato diseases: Pseudomonas corrugata, P. mediterranea, P. syringae pv. tomato Pectobacterium carotovorum subsp. carotovorum, Xanthomonas vesicatoria and Clavibacter michiganensis subsp. michiganansis. The extracts from both fungal species, evaluated by agar well diffusion method, showed an antimicrobial activity against all the teste…
Vortex shape in unbaffled stirred vessels: experimental study via digital image analysis
2011
There is a growing interest in using unbaffled stirred tanks for addressing certain processing needs. In this work, digital image analysis coupled with a suitable shadowgraphy-based technique is used to investigate the shape of the free-surface vortex that forms in uncovered unbaffled stirred tanks. The technique is based on back-lighting the vessel and suitably averaging vortex shape over time. Impeller clearance from vessel bottom and tank filling level are varied to investigate their influence on vortex shape. A correlation is finally proposed to fully describe vortex shape also when the vortex encompasses the impeller.
EXPERIMENTAL INVESTIGATION OF DILUTE SOLID-LIQUID SUSPENSION IN AN UNBAFFLED STIRRED VESSELS BY A NOVEL PULSED LASER BASED IMAGE ANALYSIS TECHNIQUE
2009
The availability of experimental information on solid distribution inside stirred tanks is a topic of great importance in several industrial applications. The measurement of solid particle distribution in turbulent multiphase flow is not simple and the development of suitable measurement techniques is still in progress. In this work a novel non-intrusive technique for measuring particle concentration fields in solid-liquid systems is employed. The technique makes use of a laser sheet, a high sensitivity digital camera for image acquisition and a Matlab procedure for post-processing the acquired images. Experimental data are here obtained for the case of an unbaffled stirred tank. Stable tor…
A simple methodology for comparing cost-benefit of traditional, green and cool roofs
2019
Energy policy makers, architects and researchers, when designing new buildings or rehabilitating the existing ones, are engaged in the attempt of limiting the energy needs for climatization (NZEB buildings) and the environmental pressure exerted by buildings (EU Climate Action). The pursuit of this demanding assignment calls for innovative solutions in conceiving the building envelope and its energy systems. Recently, among the most effective tools for improving the energy and environmental performances of buildings, the technical interventions regarding the roofs are gaining a rising attention. Indeed, covers of buildings are responsible of a relevant part of their energy losses and, on th…
ROMANIAN SMES VERSUS THE GLOBAL FINANCIAL CRISISIMPEDIMENTS AND OPPORTUNITIES
2012
This paper studies the way small and medium sized enterprises have reacted towards the global financial crisis. It also attempts to study the impact this crisis had on both the activity of these enterprises and on the business mentality in Romania. The article studies the reasons which determined the SMEs’ vulnerability during the crisis; these belong to a wide range, spreading from the tightening of the financing options or of the activity, up to the management’s nature. The impact of the economic crisis is studied starting with the statistics in the specialty literature, which highlight the SMEs’ situation starting with 2008. Having as support these numbers, the paper analyzes the effects…
Performance Improvement of a Drag Hydrokinetic Turbine
2021
Hydropower is at present in many locations, among all the other possible renewable energy sources, the best one for net cost per unit power. In contrast to traditional installation, based on water storage in artificial basins, free flow river turbines also provide a very low environmental impact due to their negligible effect on solid transport. Among them, kinetic turbines with vertical axis are very inexpensive and have almost zero impact on fish and local fauna. In application to tidal waves and sea waves, where vertically averaged velocities have alternate direction, a Savonius rotor also has the advantage of being productive during the whole time cycle. In this work, the effect of an u…
Application of EMI and FDR Sensors to Assess the Fraction of Transpirable Soil Water over an Olive Grove
2018
Accurate soil water status measurements across spatial and temporal scales are still a challenging task, specifically at intermediate spatial (0.1–10 ha) and temporal (minutes to days) scales. Consequently, a gap in knowledge limits our understanding of the reliability of the spatial measurements and its practical applicability in agricultural water management. This paper compares the cumulative EM38 (Geonics Ltd., Mississauga, ON, Canada) response collected by placing the sensor above ground with the corresponding soil water content obtained by integrating the values measured with an FDR (frequency domain reflectometry) sensor. In two field areas, characterized by different soil clay conte…
Flexicurity as a measuring leakage protection of workers: between "social pollution" and "total security"
2012
Was not the labour problem the same everywhere? The paper attempts to answer this question by proposing a re-interpretation of flexicurity through the comparison with the economic concepts of externalities and distortion of competition. After a methodological and epistemological premise, based on a multidisciplinary literature, the paper - critically addresses the origins of flexicurity and argues that it lacks an archetypical definition, especially in the formulation of the EU Commission. Hence, the paper considers flexicurity as any balance between flexibility and security and, therefore, proposes ordering any set of contracts, providing the same balance and with the same regulatory fr…
La place du français dans les programmes éducatifs plurilingues en Espagne
2014
Améliorer les compétences de communication en langues étrangères est devenu l’un des éléments clé de la politique éducative de l’Europe, en réponse à l’énorme défi de la mondialisation et à l’acquisition nécessaire de nouvelles compétences professionnelles. Les programmes plurilingues en langue étrangère ont ainsi acquis une place de plus en plus importante dans notre réalité éducative. Cet article présente une réflexion sur la situation actuelle de ces programmes et montre les obstacles à franchir pour l’enseignement du français comme deuxième langue étrangère avec l’arrivée de la LOMCE (Loi Organique pour l’Amélioration de la Qualité de l’Éducation).
«(Des)obediències de la reducció vocàlica en el català de Mallorca»
2013
En el català de Mallorca, el procés de reducció vocàlica de les vocals mitjanes de la sèrie anterior a e neutra en posició àtona no opera (o subaplica) en determinades circumstàncies: (a) en formes derivades productives amb una vocal àtona situada a la síl·laba esquerra o inicial del radical i alternant amb e tancada o e oberta en el radical de la forma primitiva; (b) en formes verbals amb una vocal àtona situada a la síl·laba esquerra o inicial del radical i alternant amb e tancada en una altra forma verbal del mateix paradigma flexiu; (c) en manlleus i paraules apreses amb una vocal àtona e situada, també, a la síl·laba esquerra o inicial del radical i generalment precedida d’una consonan…