Search results for "ibers"
showing 10 items of 578 documents
Characterization of electrospun poly(lactide) composites containing multiwalled carbon nanotubes
2019
The author(s) disclosed receipt of the following financial support for the research, authorship, and/or publication of this article: The authors would like to thank the Ministry of Education, Science and Technological Development, Republic of Serbia, for funding projects III45022 and 172056 and European Cooperation in Science and Technology (COST) action CA15107.
Solid-state electrochemistry of LDH-supported polyaniline hybrid inorganic–organic material
2008
Abstract The solid-state electrochemistry of a Zn–Al layered double hydroxide-supported polyaniline material (LDH-PANI) in contact with aqueous electrolytes is described. Interconversion processes between different forms (emeraldine, protoemeraldine, leucoemeraldine, nigraniline and pernigraniline) of the LDH-supported polyaniline units are involved in redox processes. This material exhibits significant variations of impedance upon application of different conditioning potentials, acting as an electrochemical frequency filter. Using Fe (CN) 6 4 - as redox probe, LDH-PANI can be used as a chemical–electrochemical information processing system equivalent to different combinational logic circu…
Motivos para el consumo de cibersexo y su relación con el grado de severidad
2018
La práctica del cibersexo es un comportamiento frecuente que puede desembocar en un patrón de consumo compulsivo, incontrolado y asociado a un deterioro funcional en diversos ámbitos (adicción al cibersexo). Por tanto, conocer los motivos que explicarían que una persona realice esta conducta (de modo recreativo o patológico) es prioritario. Así, este trabajo se plantea el objetivo de analizar la prevalencia de distintos motivos para el consumo de cibersexo, las diferencias en función del género y el vínculo entre estos motivos y los síntomas de consumo problemático. Tomando una muestra de 400 jóvenes (50% hombres) de entre 18-30 años (M=22.2), se constata que las motivaciones más frecuentes…
Adicción al cibersexo en función de la orientación sexual: prevalencia y predictores
2020
El cibersexo, una práctica sexual generalizada en la sociedad, puede entrañar ciertos beneficios, aunque también conlleva riesgos (como desarrollar una adicción). Dado que el colectivo LGTBI (Lesbianas, gays, transexuales, bisexuales e intersexuales) lo consume más frecuentemente, el riesgo de adicción también podría ser mayor. Este estudio pretende analizar si la orientación sexual aumentaba el riesgo de consumo adictivo de cibersexo, y si la preferencia por determinadas Actividades Sexuales Online (ASOs) y las motivaciones para su realización explicaban este incremento. A tal fin, 553 personas de entre 18-40 años (54.2% hombres; 36.2% heterosexuales, 36.2% bisexuales, 27.7% homosexuales) …
Conductas sexuales online y sus motivaciones: Una aproximación desde la diversidad sexual
2020
El uso de Internet con objetivos sexuales (cibersexo) es una actividad cada vez más generalizada en todos los sectores de la población. Sin embargo, el modo en el que se realiza (frecuencia, tipos de actividad sexual online –ASO–, motivaciones, etc.) puede cambiar en función de características como la orientación sexual. Cuando el hecho de sentir atracción sexual hacia personas del mismo sexo suponía mayor rechazo y estigmatización que en la actualidad, el cibersexo constituía un espacio seguro donde experimentar con la sexualidad; así, era fácil comprender que su consumo entre personas homosexuales y bisexuales fuera superior. Actualmente, su empleo como espacio seguro parece quedar en seg…
Assessment of Arundo donax Fibers for Oil Spill Recovery Applications
2019
In the last years, natural fibers are increasingly investigated as an oil recovery system in order to overcome the oil spillage phenomena, thus preserving environment and aquatic life. In particular, lignocellulose-based fibers have recently been employed with promising results. In such a context, the aim of this paper is to assess the oil sorption capability of natural fibers extracted from the stem of the giant reed Arundo donax L., a perennial rhizomatous grass belonging to the Poaceae family that grows naturally all around the world thanks to its ability to tolerate different climatic conditions. Sorption tests in several pollutants and water as a reference were carried out. The fibers …
Experimental generation of optical flaticon pulses
2013
International audience; We experimentally investigate the nonlinear reshaping of a continuous wave which leads to chirp-free and flat-top intense pulses or flaticons exhibiting strong temporal oscillations at their edges and a stable self-similar expansion upon propagation of their central region. This study was performed in the normal dispersion regime of a non-zero dispersion-shifted fiber and involved a sinusoidal phase modulation of the continuous wave. Our fiber optics experiment is analogous to considering the collision between oppositely directed currents near the beach, and it may open the way to new investigations in the field of hydrodynamics.
All-optical signal processing at ultra-low powers in bottle microresonators using the Kerr effect.
2010
We present experimental results on nonlinear, ultra-low power photonics applications based on a silica whispering-gallery-mode microresonator. Our bottle microresonator combines an ultrahigh quality factor of Q10(8) with a small mode volume V. The resulting Q(2)/V-ratio is among the highest realized for optical microresonators and allows us to observe bistable behavior at very low powers. We report single-wavelength all-optical switching via the Kerr effect at a record-low threshold of 50 microW. Moreover, an advantageous mode geometry enables the coupling of two tapered fiber waveguides to a bottle mode in an add-drop configuration. This allows us to route a CW optical signal between both …
Observation of Kuznetsov-Ma soliton dynamics in optical fibre
2012
International audience; The nonlinear Schro¨dinger equation (NLSE) is a central model of nonlinear science, applying to hydrodynamics, plasma physics, molecular biology and optics. The NLSE admits only few elementary analytic solutions, but one in particular describing a localized soliton on a finite background is of intense current interest in the context of understanding the physics of extreme waves. However, although the first solution of this type was the Kuznetzov-Ma (KM) soliton derived in 1977, there have in fact been no quantitative experiments confirming its validity. We report here novel experiments in optical fibre that confirm the KM soliton theory, completing an important serie…
On the mechanical behavior of BFRP to aluminum AA6086 mixed joints
2013
The aim of this work is to analyze the possibility to join aluminum alloy AA6086 and composite laminates reinforced with basalt fibers, an innovative material which use is growing in several applications as an alternative to glass fibers. To this goal, three joining techniques were investigated: mechanical by Self Piercing Riveting (in the next called SPR), adhesive by co-curing technique and mixed in which the joining techniques (i.e. adhesive and mechanical) were combined. Two manufacturing technologies (i.e. hand lay-up and vacuum bagging) were used both to produce composite substrates and to realize co-curing adhesion between the substrates to be joined. Mixed joints were realized by in…