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showing 10 items of 409 documents
Multipactor RF Breakdown in Coaxial Transmission Lines With Digitally Modulated Signals
2016
The aim of this paper is the study of the RF multipactor breakdown in coaxial transmission lines excited by a single carrier with a digitally modulated signal. Employing an in-house developed code, numerical simulations are performed to determine the RF multipactor voltage threshold for several digitally modulated signals under different modulations schemes: quadrature phase-shift keying, 16-quadrature amplitude modulation, 16-amplitude and phase-shift keying, and 32-amplitude and phase-shift keying. Moreover, a coarse method based on the envelope integration to determine the RF multipactor voltage threshold when involving arbitrary digital modulations is also presented. These results are a…
Management of infants with neural tube defects (NTDs) in NICU
2017
Neural tube defects (NTDs) are a group of congenital malformations of the central nervous system, which derive from an altered embryological development during neurulation. The different types of NTDs are closely related to their onset in the embryonic period; precocity is an index of greater severity of clinical manifestation. The myelomeningocele is one of the most common pathological conditions which is included into the spectrum of NTDs. It is characterized by the lack of fusion of the vertebral arches, resulting in eversion of the meninges and medullary content; it is the condition which clearly needs more assistance in the neonatal intensive care unit. The management of patients with …
The motor development of preterm infants after the neonatal intensive care unit
2017
The extra uterine environment is a hostile environment, due to noises, lights and different biological activities compared to intra uterine environment for infants born preterm or underweight. Stress and painful experiences may also impact developmental outcomes. In addition, developmental delay risks increase with the decrease in gestational age. Thus, those born with immature developed systems may need neonatal intensive care units (NICU) in order to allow a correct growth and body maturation. In general, infants that need NICUs suffer from a slower development compared to their full-term peers. This may translate in a delay in oral, tactile, kinesthetic, vestibular, auditory, olfactory, …
The global crisis of multidrug resistance: how to face healthcare associated infections without effective antibiotics?
2013
[No abstract available
Bertrand Lavier : a connection between art and reality
2014
This study aims to establish how French artist Bertrand Lavier (1949) defines and expresses reality in his work. In addition, we wanted to provide a historical and critical answer to a key problematic of contemporary art's history, the link between art and life. First, we dealt with several Lavier's series, from the late 1960s till nowadays, from which emerge recurring topics : representation ontology, the problem of paintings and sculptures definition, which the artist employs himself to rebuilt. Furthermore, he also makes a methodical critic of language as a reliable component of reality, pointing its limits and flaws, acting his divorce with then dominant conceptual art, converting himse…
CSR practices in professional sport clubs : towards a new model of legitimization?
2012
The concept of Corporate Social Responsibility (CSR), developed in the US throughout the second half part of the 20th century, is the application of the principles of sustainable development in businesses. Formerly used by the multinational sector only, the concept of CSR has spread nowadays over a large kind of organizations including French professional sports clubs. The purpose of this research is to show, in the continuity of neoinstitutionnalism, that CSR practices in these organizations are primarily answering to goals of legitimating, aiming to make their activities viable towards the expectations of their environment stakeholders. Suggesting a framework, and applying it to four case…
Quels progrès en matière de statut des groupes parlementaires ?
2018
International audience
Hearing loss in neonatal intensive care units (NICUS): Follow-up surveillance
2017
Infants admitted to the neonatal intensive care unit (NICU), who represent the 4-8% of all births, present problems such as prematurity, low Apgar scores, infections, hyperbilirubinemia and hearing impairment. In particular significant hearing loss is the most common disorder at birth, occurring in 1 to 2 newborns per 1000 in the general population and 24% to 46% of newborns who are admitted to a NICU. This leads more difficulty to develope verbal skills (learning vocabulary, grammar, word order and idiomatic expressions), language, learning and speech. Hearing impairment influences also cognitive and affective development of infants making consequences in their interpersonal relationships.…
Revision of the European, North-African and Central Asian species of the genus Norbanus Walker 1843 (Hymenoptera: Pteromalidae)
2010
The European, North-African and Central Asian species of the genus Norbanus Walker are revised, providing an illustrated key to males and females of all the species. Three new synonymies are proposed: Norbanus globulariae (Szele´nyi 1941) 5 Norbanus giordanii (Ferrie`re 1952), n. syn.; Norbanus meridionalis (Masi 1922) 5 Norbanus mordellidarum Dzhanokmen 1999, n. syn.; Norbanus obscurus (Masi 1922) 5 Norbanus erdoesi (Szele´nyi 1974), n. syn. Both sexes of N. guyoni are redescribed, and its type locality clarified. A new host record together with distributional data are given for nine out of ten valid species.
Scalar mesons moving in a finite volume and the role of partial wave mixing
2012
Phase shifts and resonance parameters can be obtained from finite-volume lattice spectra for interacting pairs of particles, moving with nonzero total momentum. We present a simple derivation of the method that is subsequently applied to obtain the pi pi and pi K phase shifts in the sectors with total isospin I=0 and I=1/2, respectively. Considering different total momenta, one obtains extra data points for a given volume that allow for a very efficient extraction of the resonance parameters in the infinite-volume limit. Corrections due to the mixing of partial waves are provided. We expect that our results will help to optimize the strategies in lattice simulations, which aim at an accurat…