Search results for "Gain"
showing 10 items of 625 documents
Stimulated Brillouin scattering in Germanium-doped-core optical fibers up to 98% mol doping level
2018
International audience; We experimentally investigate stimulated Brillouin scattering in several highly GeO2-doped optical fibers and report wide frequency tunability over more than 3 GHz and Brillouin gain 7 times larger than in standard silica fibers.
On the possibility of observing bound soliton pairs in a "wave-breaking-free" mode-locked fiber laser
2007
To generate ultrashort pulses with higher energy in passively mode-locked fiber lasers, several groups have recently focused on the development of laser cavities operating in normal path-averaged dispersion, with a view to achieve wave-breaking-free operation. The mode-locking mechanism in fiber laser play a key role in providing scalability limitation: for instance, nonlinear polarization evolution can be overdriven. Furthermore, the differential gain of the doped fiber decreases along with the traveled distance. From all of these limitations, it follows that power scalability is always bounded for virtually any mode-locked laser cavity design. In general, the consequence is the emergence …
Un réexamen du modèle de gains de Mincer
1986
A re-appraisal of mincer's earnings model Starting from rough measures of formal schooling and on the job training, the earning model proposed by J. Mincer (1974) suceed to explain a substantial proportion of the variance of individual earning. The explanatory power of the model can be significantly boosted by increasing the quality of the variables. In spite of the robustness of the model, the interpretation of the results is to be taken cautiously. These results can be derived from alternative theoretical hypothesis and namely to the one known as the filter hypothesis. It is shown that a specification of the earnings function consistent with the filter hypothesis is proced to be empirical…
Some Plant Defense Stimulators can induce IL-1β production in human immune cells in vitro
2020
8 pages; International audience; Among Plant Protection Products (PPP), a new emerging category of pesticides act by stimulating plant defense in order to improve plant resistance against microbial pathogens. Given that these compounds, the so-called Plant Defense Stimulators (PDS) act on innate immunity, we tested, using an in vitro approach on human mononuclear leucocytes (PBMC), the potential toxicity (XTT assay) and inflammatory effects (production of IL-1β) of 4 PPP belonging to different chemical families. We found that two products (LBG-01F34® and Regalis®) did not induce any cytotoxicity or IL-1 β production. The product BION-50 WG®, that contains Acibenzolar-S-methyl (ASM) and sili…
Sesquiterpene volatile organic compounds (VOCs) are markers of elicitation by sulfated laminarine in grapevine
2015
SPE IPM UB CT1; International audience; Inducing resistance in plants by the application of elicitors of defense reactions is an attractive plant protection strategy, particularly for grapevine (Vitis vinifera), which is susceptible to severe fungal diseases. Although induced resistance (IR) can be successful under controlled conditions, in most cases, IR is not sufficiently effective for practical disease control under outdoor conditions. Progress in the application of IR requires a better understanding of grapevine defense mechanisms and the ability to monitor defense markers to identify factors, such as physiological and environmental factors, that can impact IR in the vineyard. Volatile…
Comparative analysis of PR gene expression in tomato inoculated with virulent Fusarium oxysporum f. sp. lycopersici and the biocontrol strain F. oxys…
2008
Non-pathogenic strains of Fusarium oxysporum have the capacity to protect plants against wilt induced by pathogenic strains of F. oxysporum. Among the mechanisms involved in this protection, induced systemic resistance has been demonstrated by using a split-root method. The aim of this study was to follow the accumulation kinetics of transcripts encoding 5 PR proteins in roots and leaves of tomato inoculated with a pathogenic or a protective strain in comparison to non-inoculated control. Moreover quantification of transcripts was assessed by real-time RT-PCR in cell cultures inoculated with the pathogenic or the protective strain. Results showed a lower expression of PR encoding genes in t…
Poétique de l’utilité. Fictions évaluatrices et expérimentations sexuelles chez Diderot
2016
International audience; L’objet de cet article est de montrer que l'appréhension à partir de la poétique des lois concernant la vie elle-même et sa production est à prendre au sérieux. Dans la perspective ouverte par Bordeu, les hybrides vivants imaginés ne sont pas tant des conjectures et encore moins un programme d’action, que les résultats d’un exercice réglé de la pensée, étalonné selon une règle poétique, dont l’enjeu est politique : il s’agit d’évaluer des lois positives. Cette hypothèse de lecture permet de relire d’autres textes de Diderot, d’identifier peut-être certaines sources de cette pratique philosophique et, d’un point de vue général, d’appuyer l’interprétation du discours p…
Misure di prevenzione antimafia e diritto del lavoro
2021
Il saggio affronta il tema delle interrelazioni tra misure di prevenzione e diritto del lavoro soffermandosi sul ruolo dell'amministratore giudiziario, sul licenziamento e sulla tutela del lavoratore nel mercato. The essay deals with the issue of interrelationships between prevention measures and labor law, focusing on the role of the judicial administrator, on dismissal and on the protection of the worker in the market.
Adaptation and validation of the Victim-Blaming Attitudes in Cases of Intimate Partner Violence Against Women (VB-IPVAW) Scale in Ecuadorian populati…
2021
Resumen La violencia de pareja contra la mujer (VPM) constituye un grave problema de salud pública con importantes consecuencias para la salud física y psicológica de las mujeres. Las ac titudes de culpabilización de la víctima pueden contribuir a crear un clima de aceptación social en el que la VPM se perciba como una conducta normativa, influyendo en las respuestas de los individuos, comunidades, e instituciones frente a este problema. Ecuador es uno de los países de Latinoamérica donde la prevalencia de VPM es más alta, y las investigaciones sobre esta temática son todavía escasas. El objetivo de este estudio es adaptar y validar la Escala Española de Actitudes de Culpabilización de la V…
A Cross-Cultural Exploratory Study of Health Behaviors and Wellbeing During COVID-19
2021
This study explored the influence of the COVID-19 pandemic on perceived health behaviors; physical activity, sleep, and diet behaviors, alongside associations with wellbeing. Participants were 1,140 individuals residing in the United Kingdom (n = 230), South Korea (n = 204), Finland (n = 171), Philippines (n = 132), Latin America (n = 124), Spain (n = 112), North America (n = 87), and Italy (n = 80). They completed an online survey reporting possible changes in the targeted behaviors as well as perceived changes in their physical and mental health. Multivariate analyses of covariance (MANCOVA) on the final sample (n = 1,131) revealed significant mean differences regarding perceived physical…