58 research outputs found
Exploring the COMPIN-10 and SUCOMP-10 Scales: Measuring Inferiority and Superiority Complexes Across Nine Countries
No full textU ovome se radu predstavljaju ispitivanja kratkih ljestvica kompleksa inferiornosti (COMPIN-10) i kompleksa superiornosti (SUCOMP-10). Sudionici (N = 4010; 57 % žena) iz devet zemalja u dobi između 18 i 77 godina (M = 29.68, SD = 10.62) mrežnim su putem ispunili ljestvice na svojim materinskim jezicima. Ispitane su pouzdanost, dimenzionalnost i konvergentna valjanost ljestvica. Potvrđeni su zadovoljavajući koeficijenti pouzdanosti za obje ljestvice. Jednodimenzijsku strukturu ljestvice COMPIN-10 podržali su uzorci iz različitih zemalja, dok ljestvica SUCOMP-10 nije pokazala jednodimenzijsku strukturu. Osim toga, rezultati su ukazali na to da je ljestvica COMPIN10 postigla jedino invarijantnost opterećenja, dok se kod ljestvice SUCOMP-10 nije pokazala invarijantnost među zemljama. Rezultati na ljestvici inferiornosti bili su negativno povezani s mjerama samopoštovanja, ekstraverzijom, ugodnošću i savjesnošću, a rezultati na ljestvici superiornosti bili su pozitivno povezani s mjerama samopoštovanja, ekstraverzijom i savjesnošću, što potvrđuje konvergentnu valjanost obiju ljestvica u uzorcima svih zemalja. Rezultati ove višenacionalne studije pokazuju da je ljestvica COMPIN-10 robusniji istraživački instrument; međutim, preporučuju se daljnja revizija i usavršavanje obiju ljestvica.This study introduces the short Inferiority Complex (COMPIN-10) and Superiority Complex (SUCOMP-10) scales. Participants (N = 4,010; 57% women), aged between 18 and 77 years (M = 29.68, SD = 10.62), were recruited from nine countries and completed the scales online in their native languages. The reliability, dimensionality, and convergent validity of the scales were examined. Satisfactory reliability coefficients were confirmed for both scales. The unidimensional structure of the COMPIN-10 scale was supported across country samples, whereas the SUCOMP10 scale did not exhibit a unidimensional structure. Additionally, the results indicated that the COMPIN-10 scale only achieved loading invariance, while the SUCOMP-10 scale lacked invariance across countries. The inferiority scores correlated negatively with self-esteem measures, extraversion, agreeableness, and conscientiousness, and the superiority scores correlated positively with self-esteem measures, extraversion, and conscientiousness, confirming the convergent validity of both scalesin the respective country samples. The results of this multi-country study indicate that the COMPIN-10 scale is a more robust research instrument; however, further revision and refinement of both scales is recommended
Local extinction and colonisation in native and exotic fish in relation to changes in land use
Get PDFDistribution patterns of many native and exotic fish species are well documented, yet little is known about the temporal dynamics of native and exotic diversity in relation to changes in land use. We hypothesised that colonisation rates would be higher for exotic fish species and that extinction rates would be higher for native species in large stream systems. We also predicted that cold-water species would be more impacted than thermally tolerant species. To test these hypotheses, we used generalised linear mixed models to compare changes in native and exotic fish species richness over 10 years in a French drainage basin subjected to landscape alterations. Exotic fish were more susceptible to local extinction than the native ones. Extinction was greater among cold-tolerant species and at higher elevations. Colonisation by exotic species was higher at lower elevations. Although a decade of expanding urbanisation affected fish colonisation, agricultural lands experienced higher extinction rates. In the context of global changes in land use and population pressure, our study suggests that the temporal dynamics of fish diversity are driven by landscape alterations as well as by the thermal tolerance of species
Sur les thiosulfocarbamates et les xanthates de cobalt et de nickel /
No full textThèse de doctorat: Pharmacie: Ecole supérieure de Pharmacie de l'Université de Paris: 1919
Environmental effects related to the local absence of exotic fish
Get PDFGiven the extent of biological invasions in industrialized countries, our understanding of the determinants of overall patterns of biological invasions could gain most from consideration of why exotic species are absent from some areas, rather than from distribution patterns of exotic species. Fish communities were sampled at 381 sites representing 221 rivers in the Adour-Garonne stream system (116 000 km², SW France). Very few rivers were not colonized by exotic fish species, however, on a local basis, only 33% of the sampling sites hosted exotics. Using General Linear Modelling, we found that patterns of exotic fish (occurrence, number of species, proportion within assemblage) responded to both land-use and physical variables, whereas patterns of native fish only responded to the local meso-scale characteristics of each stream reach from headwaters to mouth. All fish communities were susceptible to invasion regardless of native species richness, and higher native species richness did not decrease the opportunity for establishment by exotic species. The likelihood that exotic fish are absent primarily increased with elevation and with lower human influence upon the land cover, while human-impacted landscapes (agricultural and urban areas) were more likely to host exotic fish and higher numbers of exotic species. In light of urban and agricultural development, our ability to detect responses of exotic species to landscape alterations using a combination of simple physical and land cover variables exemplifies a cost-effective technique for assessing areas at greater invasion risk in large stream systems
Invertebrate distribution patterns and river typology for the implementation of the water framework directive in Martinique, French Lesser Antilles
Get PDFOver the past decade, Europe's Water Framework Directive provided compelling reasons for developing tools for the biological assessment of freshwater ecosystem health in member States. Yet, the lack of published study for Europe's overseas regions reflects minimal knowledge of the distribution patterns of aquatic species in Community's outermost areas. Benthic invertebrates (84 taxa) and land cover, physical habitat and water chemistry descriptors (26 variables) were recorded at fifty-one stations in Martinique, French Lesser Antilles. Canonical Correspondence Analysis and Ward's algorithm were used to bring out patterns in community structure in relation to environmental conditions, and variation partitioning was used to specify the influence of geomorphology and anthropogenic disturbance on invertebrate communities. Species richness decreased from headwater to lowland streams, and species composition changed from northern to southern areas. The proportion of variation explained by geomorphological variables was globally higher than that explained by anthropogenic variables. Geomorphology and land cover played key roles in delineating ecological sub-regions for the freshwater biota. Despite this and the small surface area of Martinique (1080 km²), invertebrate communities showed a clear spatial turnover in composition and biological traits (e.g., insects, crustaceans and molluscs) in relation to natural conditions
AIM (Artery in microgravity): Design and development of an ice cubes mission
Get PDFThe Artery In Microgravity (AIM) project is the first experiment to be selected for the “Orbit Your Thesis!” programme of ESA Academy. It is a 2U experiment cube designed for the ICE Cubes facility on board of the International Space Station. The experiment is expected to be launched on SpaceX-20 in early 2020. The project is being developed by an international group of students from ISAE-SUPAERO and Politecnico di Torino, under the supervision of the ISAE-SUPAERO and Politecnico di Torino staff. The experiment is a test-bench for investigating haemodynamics in microgravity focusing on coronary heart disease, the most common form of cardiovascular disease and the cause of approximately 9 million deaths every year. Coronary heart disease is caused by stenosis of the coronary artery due to the build-up of plaque. While the development of atherosclerosis is not fully understood, the primary event seems to be subtle and repeated injury to the artery walls through various mechanisms including physical stresses from flow disturbances as well as from systemic and biological risk factors. In the presence of severe stenosis, patients are treated with the implantation of one or more coronary stents, which are tubular scaffolds devoted to restore and maintain myocardial perfusion. The coronary stenting procedure is largely applied (e.g., 1.8 million stents per year implanted in USA) In view of the impact that coronary artery disease has on humans, as well as of the increasing number of people that will be involved in space flights in the future, the way astronauts in space coronary hemodynamics is affected by the absence of gravity in the presence of stenosis or of stenting needs to be investigated in depth. In addition, as most stents are metallic objects, the radiation exposure in space might interact with their surface, altering blood flow, inducing particles release and ultimately leading to stent failure. Therefore, the aim of AIM is to start studying the vascular haemodynamics in a stented and a stenosed coronary artery on Earth and in microgravity and the stent-radiation coupling. This will allow to learn about the effect gravity plays on coronary artery haemodynamics, the effects of microgravity and radiation on the performance of implantable devices and ultimately the risks of myocardial infarction to astronauts on long-distance spaceflight. The experimental setup consists of a closed hydraulic loop containing two models of a coronary artery in series. An electric pump and reservoir will control the flow of a blood-mimicking fluid through the system. One model of the coronary artery will contain a coronary stent. The pressure of the fluid will be studied along its path using a series of pressure sensors and a camera will visualise the flow. The same experiments will be repeated on the ground with the same conditions as the in-flight model for comparison. The paper will outline in detail the design and development of the AIM experiment cube and the results of testing. The full data and results will be available after the completion of the mission which is expected to be between March and June 2020
Biological traits of European pond macroinvertebrates
Get PDFWhilst biological traits of river macroinvertebrates show unimodal responses to geographic changes in habitat conditions in Europe, we still do not know whether spatial turnover of species result in distinct combinations of biological traits for pond macroinvertebrates. Here, we used data on the occurrence of 204 macroinvertebrate taxa in 120 ponds from four biogeographic regions of Europe, to compare their biological traits. The Mediterranean, Atlantic, Alpine, and Continental regions have specific climate, vegetation and geology. Only two taxa were exclusively found in the Alpine and Continental regions, while 28 and 34 taxa were exclusively recorded in the Atlantic and Mediterranean regions, respectively. Invertebrates in the Mediterranean region allocated much energy to reproduction and resistance forms. Most Mediterranean invertebrate species had narrow thermal ranges. In Continental areas, invertebrates allocated lesser energy to reproduction and dispersal, and organisms were short lived with high diversity of feeding groups. These characteristics suggest higher resilience. The main difference between ponds in the Alpine and Atlantic regions was their elevation. Alpine conditions necessitate specific adaptations related to rapid temperature fluctuations, and low nutrient concentrations. Even if our samples did not cover the full range of pond conditions across Europe, our analyses suggest that changes in community composition have important impacts on pond ecosystem functions. Consistent information on a larger set of ponds across Europe would be much needed, but their low accessibility (unpublished data and/or not disclosed by authors) remains problematic. There is still, therefore, a pressing need for the incorporation of high quality data sets into a standardized database so that they can be further analyzed in an integrated European-wide manner
An elastic lidar system for the H.E.S.S. Experiment
No full textInternational audienceThe H.E.S.S. experiment in Namibia, Africa, is a high energy gamma ray telescope sensitive in the energy range from ~100 Gev to a few tens of TeV, via the use of the atmospheric Cherenkov technique. To minimize the systematic errors on the derived fluxes of the measured sources, one has to calculate the impact of the atmospheric properties, in particular the extinction parameter of the Cherenkov light (~300–650 nm) exploited to observe and reconstruct atmospheric particle showers initiated by gamma-ray photons. A lidar can provide this kind of information for some given wavelengths within this range. In this paper we report on the hardware components, operation and data acquisition of such a system installed at the H.E.S.S. site
Assessment of an artificial interlligence technique in investigating habitat partitioning by coexisting benthic invertebrates in gravel-bed rivers
No full textInternational audienc
AIM (Artery In Microgravity): An ICE Cubes Mission by University Students
Get PDFThe ICE Cubes Facility is a capable experiment platform on board the Columbus Module of the International Space Station that offers flexibility to host many different experiments. The ICE Cubes Facility is suited for any scientific research and technological demonstrator that requires the study of the effects of microgravity and radiation exposure in a pressurised volume. The ICE Cube Service is also open to different schooling levels (primary, secondary, universities) and to different STEAM curricula and offers University students (Master and PhD) the opportunity to design, develop, test and operate a real experiment for the ISS under the supervision of experts from the ICE Cube Service.The Artery In Microgravity (AIM) project is a 2U ICE Cubes experiment cube and the first experiment to be selected for the Orbit Your Thesis! programme of ESA Academy. The cube is expected to be launched on SpaceX-20 in early 2020. The project is being developed by an international group of students from ISAE-Supaero and Politecnico di Torino. The experiment will investigate coronary heart disease, the most common form of cardiovascular disease and the cause of approximately 9 million deaths every year. In view of the very long duration missions to come, such diseases may also affect healthy astronauts in space. The AIM cube is a test-bench for investigating haemodynamics in microgravity and will study the effects of microgravity on blood flow in the coronary artery with and without an implanted coronary stent and the impact of augmented radiation levels on metallic ion release from coronary stents.The experimental setup consists of a closed hydraulic loop containing two models of a coronary artery in series. An electric pump and reservoir will control the flow of a blood-mimicking fluid through the system. One model of the coronary artery will contain a coronary stent. The pressure of the fluid will be studied along its path using a series of pressure sensors and a camera will visualise the flow. Ground tests will be conducted concurrently in order to perform a comparison between the on-ground behaviour and the behaviour in microgravity.The paper will showcase the design and development of the AIM experiment cube, the results of testing and the educational applications of theICE Cubes Facility. The full data and results will be available after the completion of the mission which is expected to be between March and June 2020
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