Search results for "FIELD"

How Important is the Reproduction Technique for the Perception of Spaciousness in Music?

2016

Sound fields are preferred when spaciousness is perceived. “Spaciousness means that auditory events, in a characteristic way, are themselves perceived as being spread out in an extended region of space”. The author’s former study (2012) investigated the perception of spaciousness of five musical genres. Participants evaluated spaciousness while listening to music with loudspeakers. Resulting, these genres allowed classifications of spatial features such as “big”, “wide” and “open”. A new idea of conducting listening tests has arisen using wave field synthesis instead of headphones. Firstly, this study aims to reveal the perceptional characteristics of spaciousness in music itself with headp…

Nano-graphite cold cathodes for electric solar wind sail

2015

The nanographite (NG) films consisting of tiny graphite crystallites (nanowalls) are produced by carbon condensation from methane–hydrogen gas mixture activated by a direct current discharge. High aspect ratio and structural features of the NG crystallites provides efficient field electron emission (FE). Applicability and performance of the NG films in an electron gun (E-gun) of a solar wind thruster system with an electric sail (E-sail) is tested. The long-term tests are demonstrated suitability of E-gun assembly with the NG cathodes for the real space missions. The results of the tests are analyzed and physical mechanisms of the cathode aging and practical methods for improvement performa…

Interaction en champ proche entre une sonde nanométrique et le champ de composants à cristal photonique:- interaction faible, microscopie spatialemen…

2008

With the improvement of fabrication techniques, the nanophotonics and more especially the photonics crystals which are periodic structure at the Wavelength scale have been recently developed. In this work, by using a scanning near-field optical microscope, we study such components. Firslty, we use the local probe to visualize the light distribution inside photonic crystal microcavities etched into semiconductor III/V. We focus us on the explanation of the near-field maps formation and on the probe influence on these maps. Thus, we have visualize degeneracy splitting of optical cavity modes and clearly observed in near-field cavity modes which were not visible in far-field. Moreover, in the …

Etude en champ proche et en champ lointain de composants périodiquement nanostructurés : cristaux photoniques et tamis à photons

2004

Recently, a new class of optical components is appeared. Its main characteristic is to be formed by a periodical sub-wavelength pattern, leading to the apparition of a spectral domain where propagation of light inside the structure is forbidden -- a photonic bandgap. This work is devoted to the study in the near- and far-field of two kinds of periodical optical components: photonic crystals (PCs) and nanostructured metallic films that exhibit the so-called enhanced transmission. First, we study two-dimensional PCs with a scanning near-field optical microscope (SNOM) in collection mode. With this SNOM, we directly map the intensity distribution inside PC-based microcavities. We also evidence…

Strong field phenomena: Atoms, Molecules, Nanostructures.

HFt-LBT with Eu3+: a new nanovector for bioimaging applications

2021

Going through the lockdown: a longitudinal study on the psychological consequences of the coronavirus pandemic

2021

Coronavirus 2019 pandemic lockdown in Italy lasted for 2 months, 1 week and 2 days. During this long period, one of the longest in Europe, the restrictions produced effects on people’s psychological well-being, with consequences that also continued after lockdown. The purpose of the study is to investigate these effects and how they changed in the general population over a period of time. We are also interested in exploring people’s post-lockdown anxiety and concerns. We conducted an online survey using snowball sampling techniques. The longitudinal study consisted of four administrations covering a period of 10 weeks between April (baseline) and June (last follow-up). Levels of anxiety and…

A critical re-examination of the academic literature on venture capital networks

2020

This paper proposes a critical re-examination of the recent trends of the literature on venture capital networks. This brief review thoroughly scrutinises three papers that are representative of the recent academic literature in this field of study. I identify their points of strength and limitations, in order to pave the way for future research. This paper shows that the study of network weak and informal ties and the role of risk management strategies are promising areas for pushing the frontiers of research on venture capital networks. Extending our knowledge on this topic is crucial to understand the best strategic decisions venture capital firms should take, as parts of an inter-organi…

Exotic properties of neutrinos using effective Lagrangians and specific models

2013

289 páginas. Tesis Doctoral del Departamento de Física Teórica, de la Universidad de Valencia, y del Instituto de Física Corpuscular (IFIC).

Population Properties of Compact Objects from the Second LIGO-Virgo Gravitational-Wave Transient Catalog

2021

Abbott, R., et al. (LIGO and Virgo Collaboration)