Search results for "dance"
showing 10 items of 2075 documents
Una scuola che orienta nella formazione del progetto di vita
2019
The vocational training project is studied, within the wider life project, towards the end of adolescence. It is identified in the absence of planning, the main cause of the high number of young people who do not study, do not work and are not trained. To encourage a vocational training project by the students, teachers, in carrying out educational activities, should always bear in mind the educational and cultural profile of the young people at the end of high school.
Influence of annealing conditions on the photoelectrocatalytic performance of WO3 nanostructures
2020
[EN] Nanostructured WO3 photoanodes have been synthesized by electrochemical anodization under controlled hydrodynamic conditions in acidic media in the presence of 0.05 M H2O2. Subsequently, samples have been subjected to a thermal treatment (annealing) at different temperatures (400 degrees C, 500 degrees C and 600 degrees C) and under different gaseous atmospheres (air, N-2, Ar). The influence of these annealing conditions on the morphology, crystallinity, photoelectrochemical behavior and dopant chemistry of the different photoanodes has been investigated through Electronic Microscopy, Raman Spectroscopy, Photoelectrochemical Impedance Spectroscopy and Mott-Schottky analysis. In general…
Controlling dielectrical properties of polymer blends through defined PEDOT nanostructures
2016
[EN] The paper reports the crucial role of the morphology of poly(3,4-ethylenedioxythiophene) (PEDOT) nanostructures on the thermal and dielectric properties of polymer blends prepared thereof. PEDOT nanostructures with two different morphologies (nanoparticles and nanowires) were synthesized. The size for the nanoparticles was in the range 10 40 nm and the diameter of the nanowires was of ca. 200 nm. These nanostructures were blended with an insulating polymer matrix, poly(methyl methacrylate) (PMMA), to evaluate the dielectrical properties of the materials. The results of broadband dielèctric spectroscopy showed a strong correlation between the morphology of the nanostructure and the impr…
Negative differential resistance in carbon nanotube field-effect transistors with patterned gate oxide.
2010
We demonstrate controllable and gate-tunable negative differential resistance in carbon nanotube field-effect transistors, at room temperature and at 4.2 K. This is achieved by effectively creating quantum dots along the carbon nanotube channel by patterning the underlying, high-kappa gate oxide. The negative differential resistance feature can be modulated by both the gate and the drain-source voltage, which leads to more than 20% change of the current peak-to-valley ratio. Our approach is fully scalable and opens up a possibility for a new class of nanoscale electronic devices using negative differential resistance in their operation.
Enhancement of photoelectrochemical activity for water splitting by controlling hydrodynamic conditions on titanium anodization
2015
This work studies the electrochemical and photoelectrochemical properties of a new type of TiO2 nanostructure (nanosponge) obtained by means of anodization in a glycerol/water/NH4F electrolyte under controlled hydrodynamic conditions. For this purpose different techniques such as Scanning Electronic Microscopy (SEM), Raman Spectroscopy, Electrochemical Impedance Spectroscopy (EIS) measurements, Mott–Schottky (M−S) analysis and photoelectrochemical water splitting tests under standard AM 1.5 conditions are carried out. The obtained results show that electron–hole separation is facilitated in the TiO2 nanosponge if compared with highly ordered TiO2 nanotube arrays. As a result, nanosponges en…
La scrittura espressiva: fondamenti teorici, applicazioni e nuove prospettive di ricerca
2014
Raccontare le esperienze traumatiche e stressanti della propria vita, cercando di chiarirne i significati personali, serve non solo ad oggettivare i propri vissuti ed a conoscersi meglio, ma può anche migliorare le condizioni di salute psico-fisica, l’efficienza personale e modificare in senso positivo il modo di pensare, gli atteggiamenti, i comportamenti e le relazioni interpersonali. James Pennebaker ha inaugurato un filone di studi sperimentali volti a chiarire gli effetti della scrittura espressiva e i meccanismi psicofisiologici che si innescano quando traumi ed esperienze stressanti sono verbalizzati. Il pensiero narrativo è la prospettiva che dà fondamento teorico a tale metodo di r…
Chapter 4. Transactional Avoidance, National Laws and Possible Reforms
2017
This chapter contains an overview of the different national systems on transactional avoidance. It also contains an analysis of model laws and other efforts that UNCITRAL and other international agencies have been making in order to harmonise national regulations on transactional avoidance.
Unemployment and health in Spain
1994
We present the results of a study on the association between unemployment and health and the use of health services, exploring the influence of the socio-economic environment on these relationships. With this aim, data from the Spanish National Health Survey (SNHS) were used. Health was measured by subjective health status, presence of chronic illnesses and psychological symptoms. The use of health services was measured by drug consumption (over the counter and/or prescribed drugs), doctor consultation, hospital admission and casualty attendance. A total of 13,344 individuals aged between 16 and 65 years were included. Results were analysed for all of Spain and for 3 regions with different …
Mammalian nest predator feces as a cue in avian habitat selection decisions
2012
Breeding habitat selection is expected to be adaptive. Animals should respond to strong agents of natural selection, such as expected offspring mortality due to nest predators, in their settlement decisions. In birds, mammalian nest predators are a significant mortality source and birds are known to respond to their presence. However, the mechanism used by birds to perceive mammalian nest predators and estimate the nest predation risk remains unknown, in particular at larger spatial scales while comparing potential breeding habitat patches. We experimentally tested whether the farmland bird community can detect and perceive cues of a mammalian nest predator (urine and feces), and how this p…
The Evolution of Individuality at the Molecular and Protocellular Levels
1984
The most important bioelements (= organoelements) hydrogen, carbon, oxygen and nitrogen, are also the most abundant elements throughout the Universe besides helium, neon, and silicon (Fig, 1). In the Universe carbon is about four times as abundant as silicon. Certainly, the abundance of elements in various celestial bodies may vary greatly depending on the history of these celestial bodies.