1,384 research outputs found
Therapeutic and prophylactic gel for external use adainst candidiasis based on probiotic balis
No full textAim: to develop a gel product based on filtrates of live cultures Bacillus subtilis , Bacillus licheniformis and lectinlinking component from Lactobacillus fermentum for the treatment and prevention of dysbiosis, in particular caused by Candida. Proposed sanitary products for women based on extracellular products of probiotic strains of bioproduct Balis, increases antibacterial protection. Balis restores normal human microflora. Preventive action is provided by high antagonistic activity of probiotic components, suppression of adhesion of fungi and bacteria on the mucosal epithelium in the competitive type, increasing of anti-infective resistance
Experimental insight on an updating method with application on non-conventional wing structure
No full textIn the prediction of the dynamic behaviour of mechanical structures, the updating of the numerical model is a crucial point for industrials. Indeed, structural updating allows one to tune the numerical model to the experimental dynamic data leading first to the identification of missmodelled regions, and then to a new numerical model more representative of the experimental "real" structure with respect to the initial one. Several updating methods are available in literature most of them are classifiable as iterative sensitivity methods: the identification of missmodelled regions is obtained building a sensitivity function to structural parameters to be updated, and then performing an iterative procedure until convergence of the values of the updating parameters is reached. This paper is focused on the actual capability of the Predictor-Corrector sensitivity method to perform structural updating by means of experimental data. The main characteristic of this method is that it considers the sensitivity of two correlation functions, evaluated by the knowledge of the frequency response function of the structure: this feature is very important since the updating procedure is based only on data directly achievable from experimental tests, avoiding then numerical approximations introduced by data handling required to identify eigenfrequencies and eigenmodes of the test structure. Moreover the effectiveness of an enhancement of the Predictor-Corrector method aimed to reduce the updating parameters to be used in the iterative procedure is tested with experimental data. The experimental analyses have been carried out both on a cantilever beam and on a non-conventional aircraft wing structure with the innovative, but not so much, box-wing design. The experimental setup was formed by a Dynamic Signal Analyzer, and Transfer and Control from DIFA Measurement System, while the experimental data processing was obtained with LMS CADA-PC. The Finite Element models represent the numerical description of such structural components: the updating capabilities are investigated for different levels of structural modification experimentally obtained by changes in stiffness properties of the test articles
Four-dimensional distribution of the 2010 Eyjafjallajökull volcanic cloud over Europe observed by EARLINET
No full textThe eruption of the Icelandic volcano Eyjafjallajökull in April–May 2010 represents a "natural experiment" to study the impact of volcanic emissions on a continental scale. For the first time, quantitative data about the presence, altitude, and layering of the volcanic cloud, in conjunction with optical information, are available for most parts of Europe derived from the observations by the European Aerosol Research Lidar NETwork (EARLINET). Based on multi-wavelength Raman lidar systems, EARLINET is the only instrument worldwide that is able to provide dense time series of high-quality optical data to be used for aerosol typing and for the retrieval of particle microphysical properties as a function of altitude. In this work we show the four-dimensional (4-D) distribution of the Eyjafjallajökull volcanic cloud in the troposphere over Europe as observed by EARLINET during the entire volcanic event (15 April–26 May 2010). All optical properties directly measured (backscatter, extinction, and particle linear depolarization ratio) are stored in the EARLINET database available at http://www.earlinet.org. A specific relational database providing the volcanic mask over Europe, realized ad hoc for this specific event, has been developed and is available on request at http://www.earlinet.org. During the first days after the eruption, volcanic particles were detected over Central Europe within a wide range of altitudes, from the upper troposphere down to the local planetary boundary layer (PBL). After 19 April 2010, volcanic particles were detected over southern and south-eastern Europe. During the first half of May (5–15 May), material emitted by the Eyjafjallajökull volcano was detected over Spain and Portugal and then over the Mediterranean and the Balkans. The last observations of the event were recorded until 25 May in Central Europe and in the Eastern Mediterranean area. The 4-D distribution of volcanic aerosol layering and optical properties on European scale reported here provides an unprecedented data set for evaluating satellite data and aerosol dispersion models for this kind of volcanic events
Identification and Updating of AB 204 Helicopter Blade F.E. Model by Means of Static and Dynamic Tests
No full textIn this paper, the structural properties of the AB 204 helicopter rotor blade, whose characteristics are completely unavailable, have been identified through both static and dynamic tests, and by a further structural updating of the corresponding Finite Element numerical model. Under the hypothesis that the dynamic behavior of the blade is well described by a beam representation, this "reverse engineering" analysis estimates first the stiffness distribution, along the blade span, by measuring the displacements of the structure when known static loads are applied. Then, the mass distribution is further estimated using the modal parameters achieved from experimental tests. The 1-D finite element model, obtained using these - experimentally evaluated - elastic and mass characteristics, has been further improved by an updating procedure based on the sensitivity of frequency-response-based correlation functions to changes in the design parameters adopted for the updating process
Action trypanocide du chlorhydrate de chlorure d\u27Isométamidium (+) sur Trypanosoma evansi et essai de traitement de la trypanosomiase du dromadaire
No full textSee PDF file of the article.Vaya al archivo pdf del artículo.Le chlorhydrate de chlorure d\u27Isométamidium est doué de peu d\u27activité à l\u27égard de Trypanosoma evansi. En l\u27absence de produits plus actifs, son utilisation chez le dromadaire par injection intraveineuse ou intramusculaire à des doses comprises entre 0,50 et 1 mg/kg, permet d\u27attendre durant 2 à 3 semaines une thérapeutique réellement curativ
Description de Rhipicephalus bergeoni n. sp. (Acariens, Ixodida) des montagnes d\u27Ethiopie
No full textSee PDF file of the article.Vaya al archivo pdf del artículo.Rhipicephalus bergeoni n. sp., dont les adultes sont parasites du bétail dans les communautés forestières de montagne et dans les zones d\u27altitude des prairies subtropicales d\u27Ethiopie, appartient au groupe de Rh. sanguineus, quoique certaines particularités morphologiques puissent le faire confondre avec Rh. appendiculatus, qui semble à ce jour absent de ce pays
Validation of ESA EO Aerosol Height products with EARLINET Lidar observations
No full textIn the following, we report on the activities performed within the European Space Agency Quality Assurance for Earth Observation, QA4EO, project, Work Package 2191, titled Validation of ESA EO Aerosol Height products with EARLINET Lidar observations.
The purpose of our study is to investigate the ability of the TROPOspheric Monitoring Instrument (TROPOMI) on board on the Sentinel-5P, to deliver accurate geometrical features of lofted aerosol layers in a continental scale. Comparisons with ground-based correlative measurements constitute a key component in the validation of passive satellite products related to aerosol properties. For this purpose, we use ground-based lidar data from lidar stations belonging to the European Aerosol Research Lidar, EARLINET, network. In the frame of this work, we have developed and applied an optimal methodology for validation purposes using EARLINET optical profiles a TROPOMI aerosol products, aiming at the investigation of Aerosol Layer Height product. This approach followed is based on the previous expertise and methodology that have been firstly developed and applied in EARLINET for the GOME-2/MetOp validation activities. We are looking for collocated cases between EARLINET and TROPOMI/SS5P overpasses for the time period 2018 – 2021, over the Mediterranean Basin which is selected as the domain of interest. We focus on selecting lidar stations located near the sea, because the ALH retrieval becomes unreliable over the land. Overall, for 7 selected EARLINET stations across the Mediterranean, 25 coincident aerosol cases were found, checked and flagged for the comparison against satellite retrievals. The presented validation methodology uses the lidar backscatter profiles and collocated TROPOMI ALH pixels for a standard set of collocation thresholds in time and space. We find high correlation (R2 =0.91) between satellite and ground-based data, but also that TROPOMI ALH values underestimate by -1.2±0.86 km on average the ground-based lidar observations for the selected cases with a remarkable aerosol load.
The GOME-2 Absorbing Aerosol Height validation against EARLINET lidar profiles can be viewed in the relevant publication:
Michailidis, K., Koukouli, M.-E., Siomos, N., Balis, D., Tuinder, O., Tilstra, L. G., Mona, L., Pappalardo, G., and Bortoli, D.: First validation of GOME-2/MetOp absorbing aerosol height using EARLINET lidar observations, Atmos. Chem. Phys., 21, 3193–3213, https://doi.org/10.5194/acp-21-3193-2021, 2021
Earlinet validation of CATS L2 product
No full textThe Cloud-Aerosol Transport System (CATS) onboard the International Space Station (ISS), is a lidar system providing vertically resolved aerosol and cloud profiles since February 2015. In this study, the CATS aerosol product is validated against the aerosol profiles provided by the European Aerosol Research Lidar Network (EARLINET). This validation activity is based on collocated CATS-EARLINET measurements and the comparison of the particle backscatter coefficient at 1064nm.Atmospheric Remote Sensin
Sign of the Times: Interactions between D/deaf and Hearing Communities at Arizona State University (ASU)
No full textabstract: This study examines the interactions and intentions of D/deaf and hearing students who participate in the American Sign Language (ASL) Club and deaf Devils Club at Arizona State University (ASU). By exploring how and why students choose to participate in these organizations, one can better understand interactions between D/deaf and hearing communities. This study explores reasons hearing students become involved with d/Deaf communities, the types of interactions the hearing and d/Deaf students participate in, and how student involvement can benefit from these interactions. Qualitative interviews with students of different hearing abilities and observations inside both clubs inform this study. The implications of this research may be applicable to other D/deaf communities
EU MarcoPolo project | SO2 emission inventory over China
No full textThe aposteriori SO2 emissions for year 2014, in the domain from 102°E to 132°E and from 15°N to 55°N, in a 0.25°x0.25° spatial resolution and monthly temporal resolution, have been provided to the MarcoPolo project and can be found at http://users.auth.gr/mariliza/MarcoPolo/SO2_EmissionInventory/. For details on the creation of the inventory refer to http://users.auth.gr/mariliza/MarcoPolo/D3.4_SO2_emission_estimates.pdf and for the inclusion of the SO2 emission inventory to the MarcoPolo Emission Database refer to: http://users.auth.gr/mariliza/MarcoPolo/D4.2_DescriptionMarcoPoloInventory.pdf as well as http://users.auth.gr/mariliza/MarcoPolo/D4.3_assessment_impact_updated_emission_inventories_v2.0.pdf .
The main reference to this dataset is found here:
Koukouli, M.-E., Theys, N., Ding, J., Zyrichidou, I., Mijling, B., Balis, D., and van der A, R. J.: Updated SO2 emission estimates over China using OMI/Aura observations, Atmos. Meas. Tech. Discuss., https://doi.org/10.5194/amt-2017-256, in review, 2017.
The netcdf data files contain the following structure:
Dimensions
lat = 129
lon = 121
Attributes
author = "MariLiza Koukouli"
contact information = "[email protected]"
institution = "Laboratory of Atmospheric Physics, Aristotle University of Thessaloniki"
time frame = "2014"
sector classification = "total emissions"
emis_cat_name = "sulphur dioxide emissions"
source_type_name = "sulphur dioxide emissions"
pollutant_description = "updated sulphur dioxide emissions based on the CHIMERE model running the MEIC emissions and the OMI/Aura observations"
unit_emissions = "Mg/month"
nodata_value = "-9999.0"
Variables
float emissions(lon, lat)
</ul
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