Search results for "technique"
showing 10 items of 5596 documents
Technique et religion, de Kircher à Pontifex: questions et enjeux
2014
Innovación en la gestión educativa: un estudio empírico
2021
ABSTRACT This paper analyzes the impact of innovative education tools-in this case, based on experimental methodology-on the acquisition of theoretical knowledge among management students. The study incorporates a clear split-sample design using two equivalent, randomly created groups. One group participates in a classroom experiment designed to illustrate the concept of the Phillips Curve, while the other participated in a traditional non-experimental lesson. The experiment is implemented under a strict protocol, while results evaluation is based on the comparison of post-experiment academic performance, which guarantees full anonymity and privacy of decisions. This design analyzes the imp…
Il saggio di capitalizzazione della terra e dei miglioramenti fondiari
2008
Cytotoxic necrotizing factor type 2 produced by virulent Escherichia coli modifies the small GTP-binding proteins Rho involved in assembly of actin s…
1994
Cytotoxic necrotizing factor type 2 (CNF2) produced by Escherichia coli strains isolated from intestinal and extraintestinal infections is a dermonecrotic toxin of 110 kDa. We cloned the CNF2 gene from a large plasmid carried by an Escherichia coli strain isolated from a lamb with septicemia. Hydropathy analysis of the deduced amino acid sequence revealed a largely hydrophilic protein with two potential hydrophobic transmembrane domains. The N-terminal half of CNF2 showed striking homology (27% identity and 80% conserved residues) to the N-terminal portion of Pasteurella multocida toxin. Methylamine protection experiments and immunofluorescence studies suggested that CNF2 enters the cytosol…
I ponti in Sicilia fra XVIII e XIX secolo attraverso la rappresentazione inconografica
2014
Il contributo presenta i primi esiti di una più ampia indagine sui ponti siciliani, finalizzato alla inventariazione dei materiali iconografici relativi alle strutture realizzate o progettate e mai costruite in Sicilia fra XVIII e XIX secolo. I disegni di architettura conservati negli archivi pubblici isolani consentono di verificare conoscenze, tecniche e prerogative dei professionisti chiamati a realizzare o a ristrutturare i ponti. L’intervento prende le mosse dalla celebre incisione del ponte sul fiume Milicia (1729) dell’architetto Ferdinando Fuga, oggetto di una lunga contesa, fino alle sperimentazioni con materiali innovativi e tecniche d’importazione attuate alla metà del XIX secolo…
I ponti in Sicilia fra XVIII e XIX secolo attraverso la rappresentazione iconografica
2013
La comunicación tiene como objetivo catalogar el material iconográfico relacionado con los puentes y los proyectos de puentes elaborados en Sicilia entre los siglos XVIII y XIX. A través de una investigación que estudie los dibujos arquitectónicos conservados en los archivos públicos, se pueden comprobar los conocimientos, las técnicas y las peculiaridades de los profesionales llamados a crear o a restaurar los puentes. Las características orográficas de la isla, rica en ríos de régimen torrencial obligó a una especial atención en este campo. De hecho, son frecuentes las polémicas y los debates en situaciones complejas enfrentando el constante peligro de derrumbe determinado por las inundac…
Photoluminescent Detection of Human T-Lymphoblastic Cells by ZnO Nanorods.
2020
The precise detection of cancer cells currently remains a global challenge. One-dimensional (1D) semiconductor nanostructures (e.g., ZnO nanorods) have attracted attention due to their potential use in cancer biosensors. In the current study, it was demonstrated that the possibility of a photoluminescent detection of human leukemic T-cells by using a zinc oxide nanorods (ZnO NRs) platform. Monoclonal antibodies (MABs) anti-CD5 against a cluster of differentiation (CD) proteins on the pathologic cell surface have been used as a bioselective layer on the ZnO surface. The optimal concentration of the protein anti-CD5 to form an effective bioselective layer on the ZnO NRs surface was selected. …
La communication poli-tweet
2015
International audience
Positron production using a 9 MeV electron linac for the GBAR experiment
2020
For the GBAR (Gravitational Behaviour of Antihydrogen at Rest) experiment at CERN's Antiproton Decelerator (AD) facility we have constructed a source of slow positrons, which uses a low-energy electron linear accelerator (linac). The driver linac produces electrons of 9 MeV kinetic energy that create positrons from bremsstrahlung-induced pair production. Staying below 10 MeV ensures no persistent radioactive activation in the target zone and that the radiation level outside the biological shield is safe for public access. An annealed tungsten-mesh assembly placed directly behind the target acts as a positron moderator. The system produces $5\times10^7$ slow positrons per second, a performan…
Drawing techniques as tools for the evaluation of scholastic integration and emotional components in primary and secondary school : a cross-sectional…
2023
IntroductionIn the last decades, many studies have emphasized emotion’s role in psycho-educational processes during childhood, such as scholastic integration. Emotional variables in childhood can be assessed through projective graphic techniques, as they allow children to use kinetic components of the draws to communicate emotions.Method1.757 couple of draws were collected, from primary school children (N = 1.270; F = 643 [50.6%]; Age = 8.6; SD = 1.31) and secondary school children (N = 487; F = 220 [45.2%]; Age = 11.72; SD = 0.70) and from eight schools in Sicily and over 60 different classrooms. The Drawn Stories Technique and the Classroom Draw were used to assess children’s current emot…