4,215 research outputs found
Du management théorique au management réel: l'importance de la praxis managériale dans l'organisation et l'animation des colloques d'équipe
Does circular economy mitigate the extraction of natural resources? Empirical evidence based on analysis of 28 European economies over the past decade
Moving towards a circular economy (CE) has become one of the main strategic initiatives on a global scale in the search for sustainable economic systems. However, the conceptual relationship between sustainable development and the circular economy is a matter of ongoing debate. In particular, the extent to which CE initiatives are contributing to the mitigation of resource extraction seems to be a still unclear topic. This paper investigates the relationship between the extraction of natural resources and the CE, and also analyses the effects of critical socioeconomic drivers such as economic and population growth and economic structures. The analysis is based on a panel data covering 28 European countries during the period 2010â2019. Results confirm that promoting a shift towards more circular economic systems can reduce the extraction of primary resources. However, the mitigating effect of CE initiatives remains rather marginal when compared to the impact of economic growth. Namely, estimates show that the primary resources extracted annually linked to economic growth are roughly four times the resources saved by CE initiatives. The findings provide evidence that the circularity of economic systems should be approached from a systemic perspective that includes both production and consumption as well as waste management. In particular, complementary measures addressing behavioural consumption are needed if we want to achieve a sustainable development
On the origin of beliefs about the sexual orientation and gender-role development of children raised by gay-male and heterosexual parents : An Italian study
In three studies, heterosexual participants were presented with descriptions of heterosexual and gay-male parents. Importantly, the level of gender-role conformity of the gay-male parents was experimentally manipulated, resulting in their level of gender-role conformity ranging from high to low. Compared to the son of a heterosexual couple, the son of all gay-male couples had a lower expected likelihood of developing as heterosexual. This result was independent of the level of gender-role conformity of the gay-male couples (study 1â3). The beliefs about the gender-role development of the son, in terms of anticipated masculinity (study 1), gender stereotyping (study 2), and affective adjustment (study 3), mapped onto the level of gender-role conformity of the parents, regardless of their sexual orientation. Also, heterosexual parents were consistently judged more positively than gay-male parents, independently of their level of gender-role conformity (study 1â3). Results were discussed within the theoretical framework of stereotypes about gay-male parenting
DynamiQS: Quantum Secure Authentication for Dynamic Charging of Electric Vehicles
Dynamic Wireless Power Transfer (DWPT) is a novel technology that allows
charging an electric vehicle while driving thanks to a dedicated road
infrastructure. DWPT's capabilities in automatically establishing charging
sessions and billing without users' intervention make it prone to cybersecurity
attacks. Hence, security is essential in preventing fraud, impersonation, and
user tracking. To this aim, researchers proposed different solutions for
authenticating users. However, recent advancements in quantum computing
jeopardize classical public key cryptography, making currently existing
solutions in DWPT authentication nonviable. To avoid the resource burden
imposed by technology upgrades, it is essential to develop
post-quantum-resistant solutions. In this paper, we propose DynamiQS, the first
post-quantum secure authentication protocol for dynamic wireless charging.
DynamiQS is privacy-preserving and secure against attacks on the DWPT. We
leverage an Identity-Based Encryption with Lattices in the Ring Learning With
Error framework. Furthermore, we show the possibility of using DynamiQS in a
real environment, leveraging the results of cryptographic computation on real
constrained devices and simulations. DynamiQS reaches a total time cost of
around 281 ms, which is practicable in dynamic charging settings (car and
charging infrastructure)
Regional monitoring frameworks for the circular economy: implications from a territorial perspective
Progress in implementing circular solutions in European regions has so far been limited. This is partly due to the multifaceted territorial contexts characterizing the continent. Ultimately, the understanding of territorial dynamics is key to envisage a successful transition to a circular economy (CE). However, CE discussion from a regional standpoint is still limited and CE frameworks that can be applied to monitor and measure the CE potential in a specific territory remain at a rather theoretical level. This paper contributes to this research gap by (1) presenting a regional monitoring framework across three case studies; (2) analysing the respective territorial patterns from a CE perspective. The three case studies include the central cross-border Scandinavian area, Switzerland and Liechtenstein, and the Duchy of Luxembourg. The results reveal that circular initiatives are generally designed on the basis of available local resources and, depending on these, regional strategies seek to optimize the technical and/or biological cycles of local economies. Furthermore, the increasing levels of waste generation observed in all case studies challenge traditional waste policy approaches, generally centred on end-of-life management, in favour of more ambitious initiatives aimed at optimizing use of resources and preventing waste.This work received funding from the ESPON 2020 Cooperation Programme within the framework of the initiative to support young researchers and dissemination of ESPON results among the scientific community
What do you mean by european?: spontaneous ingroup projection : evidence from sequential priming
According to the Ingroup Projection Model (Mummendey & Wenzel, 1999), people who belong to a group tend to generalize typical ingroup characteristics to the superordinate category. That is, they project ingroup features onto the inclusive category. As a consequence of this process, the more group members perceive their ingroup as prototypical for the inclusive category the more the attitudes towards an outgroup become negative (Waldzus & Mummendey, 2004). In my dissertation, evidence was found for a âspontaneous ingroup projectionâ, that is, an association between a superordinate category prime and the ingroup instead of the outgroup prototype. In order to examine the process of ingroup projection at the implicit level, I decided to rely on sequential priming techniques. These techniques have been used in the context of research on implicit stereotyping precisely because they provide strong tests for the existence of an association between two concepts (Bargh & Chartrand, 2000). Specifically, I adapted a procedure from Wittenbrink, Judd and Park (1997). In Experiment 1 (N=95), it has been examined whether there was a spontaneous association between a superordinate category and the ingroup or the outgroup stereotypes. Concretely, it has been tested whether a superordinate category prime, namely European, facilitated the processing of ingroup rather than outgroup stereotypical attributes in two different populations, namely Italian and German undergraduate students. Research rooted in Self-Categorization Theory (Turner et al., 1987) highlighted that what is believed to be true of the ingroup depends on the particular frame of reference participants are embedded. With experiment 2 (N=42), 3 (N=81), and 4 (N=53), my goal was to investigate the process of spontaneous ingroup projection in the absence of an inter-group context and to compare this âsoloâ situation (i.e., intra-group context) with a situation in which the ingroup is compared with an other group i.e., inter-group context). Interestingly, research shows that stereotyping can be context-sensitive (Wittenbrink, Judd, & Park, 2001). Along similar lines, ingroup stereotypes have been shown to be determined by the frame of reference emerging from the context (Haslam & Turner; 1992). Different from Experiments 2, 3, and 4, in Experiment 5 two different inter- roup contexts were compared (e.g., Germans vs. Italians or Germans vs. British)
Age stereotyping of gay and heterosexual men: Why does a minority sexual orientation blur the age of old men, in particular?
This research examined age stereotyping of male individuals displaying intersectional memberships stemming from the combination of age (Young vs. Elderly) and sexual orientation categories (Gay vs. Heterosexual). We found that the age stereotypes of âElderly gay menâ were blurred: âElderly gay menâ were stereotyped less on elderly- and more on young-stereotypical traits than both âElderly heterosexual menâ (Study 1) and âElderly menâ (Studies 2â4). These findings did not occur with any subtype, as was also not the case for âElderly right-handed menâ (Study 3), but replicate only with atypical subtypes (Study 4). Indeed, the blurring of the age stereotypes for âElderly gay menâ was replicated for an additional atypical subtype, âElderly Atheist menâ, and amplified when the atypical subtype involved âElderly menâ in combination with âAthlete menâ, whose stereotypes implied youthful traits (Study 4). The results informed cognitive models of multiple category stereotyping
An Off-Nucleus Nonstellar Black Hole in the Seyfert Galaxy NGC 5252
We report the discovery of a ultraluminous X-ray source (ULX; CXO
J133815.6+043255) in NGC 5252. This ULX is an off-nuclear point-source, which
is 22 away from the center of NGC 5252, and has an X-ray
luminosity of 1.5 erg s. It is one of the rare
examples of ULX, which exhibits clear counterparts in radio, optical, UV bands.
Follow-up optical spectrum of the ULX shows strong emission lines. The redshift
of [O III] emission line coincides with the systematic velocity of NGC 5252,
suggesting the ULX is gravitationally bound to NGC 5252. The flux of [O III]
appears to be correlated with both X-ray and radio luminosity in the same
manner as ordinary AGNs, indicating that the [O III] emission is intrinsically
associated with the ULX. Based on the multiwavelength data, we argue that the
ULX is unlikely to be a background AGN. A more likely option is an accreting BH
with a black hole mass of , which might be a stripped remnant
of a merging dwarf galaxy.Comment: To appear in Ap
Validation in agent-based models: an investigation on the CATS model
In this paper we deal with some validation experiments on the complex adaptive trivial system (CATS) model proposed in Gallegati et al. [Gallegati, M., Giulioni, G., Palestrini, A., Delli Gatti, D., 2003a. Financial fragility, patterns of firmsâ entry and exit and aggregate dynamics. Journal of Economic Behavior and Organization 51, 79â97; Gallegati, M., Delli Gatti, D., Di Guilmi, C., Gaffeo, E., Giulioni, G., Palestrini, A., 2005. A new approach to business fluctuations: heterogeneous interacting agents, scaling laws and financial fragility. Journal of Economic Behavior and Organization 56, 489â512]. In particular starting from a sample of Italian firms included in the AIDA database, we perform several ex post validation experiments over the simulation period 1996â2001. In the experiments, the model parameters have been estimated using actual data and the initial set up consists of a sample of agents in 1996. The CATS model is then simulated over the period 1996â2001. Using alternative validation techniques, the simulationsâ results are ex post validated respect to the actual data
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