Search results for "Tuni"

Adaptive tuning system and parameter estimation of a digitally controlled boost converter with STM32

2019

. This paper proposes a diagnostic system of a power electronic converter, based on a cheap STM32 Nucleo board, aiming to extract some relevant measurements which gives back important values of the converter's parameters behavior. Moreover the designed system is also exploited for implementing the converter's auto tuning in order to optimize its dynamic performance.

REDU : revista de docencia universitaria

2014

[ES] Desde su origen, la misión de la universidad ha sido formar profesionales y especialistas en diversas áreas de conocimiento, pero también, la formación de una auténtica ciudadanía, responsable y comprometida éticamente con la realidad social que la rodea. El artículo presenta una contribución a los debates sobre una nueva conceptualización de la iniciativa empresarial social, así como sobre el desarrollo de planes de estudio en el espacio universitario que expliciten procesos de enseñanza-aprendizaje en emprendimiento social.Aplicamos el método de análisis de contenido para llevar a cabo una revisión crítica de los títulos universitarios que ofrecen las universidades públicas valencian…

UNIVERSITY STUDENTS’ GROWTH GOALS, OPPORTUNITIES FOR GOAL FULFILLMENT, AND PERCEIVED UNIVERSITY AND MESOSYSTEM SUPPORT

2021

This study assessed the relationship between students’ growth goals and perceived opportunities to achieve these goals in Latvia and the perceived support from the university and the mesosystem. Socialization models emphasize that the setting of personal goals occurs in continuous interaction with the sociocultural context, which includes perceived opportunities to achieve these goals and the interpersonal environment. Both – perceived support from close people (mesosystems) and perceived support from the university – are significant for students. The study involved 432 university students between 18 and 49. We have assessed the extent to which students’ goals regarding education, work, and…

Coopetition Strategy and Entrepreneurial Opportunities: Advantages from Multilevel Analyses

2018

The study aims to provide a set of insights concerning the benefits associated with applying a multilevel perspective to the investigation of the link between coopetition strategies and entrepreneurial opportunities. We emphasize that a firm capability to recognize, form, and exploit business opportunities is strictly connected to its coopetitive strategy. In order to fully understand the potential of coopetitive strategies, the focus has to be not just on the examination of the single coopetitive relationship, but also on the micro-foundations underlying such strategies: i.e. the role covered by entrepreneurs’ or CEOs’ personal traits, heuristics, and previous experiences. We also suggest …

A constrained genetic algorithm to optimize a maintenance global service

2014

It is herein developed an approach to optimize the maintenance services policy related to a Global Service Contract. In particular, the latter requires the performing of corrective maintenance and replacements of the failed components on a set of equal vehicles of a logistic Company. The tackled problem concerns the determination of an effective opportunistic maintenance policyon the basis of which when a fault occurs, it is replaced the failed component and, depending on the age of the others components, also replacements of others suitable components are performed, even if they are not yet broken, thus saving a substantial amount of system downtime. The problem is mathematically formulate…

Un evento di Archeologia Cristiana: Sur les traces du Christianisme antique en Sicile et en Tunisie. L’antiquité tardive: un legs commun entre la Tun…

2007

Les paradoxes de l'emploi féminin sur le pourtour méditérranéen

2012

Cette invitation originale à un voyage sur le pourtour de la Méditerranée permet de mieux appréhender les raisons de la colère des jeunes. L'analyse comparative dans quatorze pays révèle les paradoxes de l'emploi féminin dans des contextes sociaux, démographiques, culturels et économiques, plus ou moins distants, à la lumière de données statistiques les plus récentes. Ces contrées reflètent une image pessimiste : en écho d'une segmentation du marché du travail, le chômage frappe particulièrement la jeunesse, les itinéraires des jeunes femmes ressemblent à un dédale d'incertitudes et de contradictions. Pourtant, certains pays leur offrent davantage d'opportunités.

Crocidura cossyrensis Contoli, 1989 (Mammalia, Soricidae): karyotype, biochemical genetics and hybridization experiments

2004

The shrew Crocidura cossyrensis Contoli, 1989 from Pantelleria (I), a Mediterranean island 100 km south of Sicily and 70 km west from Tunisia, was investigated in order to understand its origin and its relationship with C. russula from Tunisia, Morocco and Switzerland. With the exception of a single heterozygote centric fusion, C. cossyrensis had a karyotype identical with that of C. russula from Tunisia (2N = 42, NF = 70 to 72), but it differed from C. russula from Morocco and Switzerland (2N = 42, NF = 60). The former have 5-6 pairs of chromosomes with small arms that are acrocentric in the latter. Genetic comparisons with allozyme data revealed small genetic distance (0.04) between C. co…

Population response during an Oceanic Anoxic Event: The case of Posidonotis (Bivalvia) from the Lower Jurassic of the Neuquén Basin, Argentina

2019

Benthonic marine species show a wide range of biological reactions to seawater chemical changes through time, from subtle adjustments to extinction. The Early Toarcian Oceanic Anoxic Event (T-OAE) was recently recognized in the Neuquén Basin, Argentina, confirming its global scope. The event was identified chemostratigraphically on the basis of a relative increase in marine organic carbon and a characteristic negative carbon-isotope excursion (δ13Corg) in bulk rock and fossil wood in the upper Pliensbachian–lower Toarcian interval in the Arroyo Lapa section (Neuquén). Simultaneously with collection of lithological samples, a high-resolution biostratigraphical survey was carried out, and the…

Cytotoxic activity of Ciona intestinalis (Tunicata) hemocytes: Properties of the in vitro reaction against erythrocyte targets

1993

Hemocytes (effectors) of Ciona intestinalis showed a natural cytotoxic capacity (HCA) when assayed in vitro against erythrocytes (targets). Cytotoxic cells lysed, to a variable extent, rabbit (RE), human (A, B, O), guinea pig, and sheep (SE) erythrocytes. Hemocyte cytotoxic activity (HCA) assayed against SE is a calcium-dependent reaction, occurs rapidly (15-30 min), at 25-37 degrees C over a wide range of pH (5.4-8.0). Assays were carried out using: 1) the medium in which hemocytes were maintained, 2) the soluble portion of hemocyte lysates, and 3) debris prepared from hemocyte lysates. Results suggest that HCA is a cell-mediated process that requires effector-target cell contacts. Anti-SE…