639 research outputs found
On the evolution of the entropy and pressure profiles in X-ray luminous galaxy clusters at z > 0.4
Galaxy clusters are the most recent products of hierarchical accretion over
cosmological scales. The gas accreted from the cosmic field is thermalized
inside the cluster halo. Gas entropy and pressure are expected to have a
self-similar behaviour with their radial distribution following a power law and
a generalized Navarro-Frenk-White profile, respectively. This has been shown
also in many different hydrodynamical simulations. We derive the
spatially-resolved thermodynamical properties of 47 X-ray galaxy clusters
observed with Chandra in the redshift range 0.4 < z < 1.2, the largest sample
investigated so far in this redshift range with X-rays spectroscopy, with a
particular care in reconstructing the gas entropy and pressure radial profiles.
We search for deviation from the self-similar behaviour and look for possible
evolution with redshift. The entropy and pressure profiles lie very close to
the baseline prediction from gravitational structure formation. We show that
these profiles deviate from the baseline prediction as function of redshift, in
particular at z > 0.75, where, in the central regions, we observe higher values
of the entropy (by a factor of 2.2) and systematically lower estimates (by a
factor of 2.5) of the pressure. The effective polytropic index, which retains
informations about the thermal distribution of the gas, shows a slight linear
positive evolution with the redshift and the concentration of the dark matter
distribution. A prevalence of non-cool-core, disturbed systems, as we observe
at higher redshifts, can explain such behaviours.Comment: 14 pages, 18 figures, accepted for publication by A&
Lo stigma anti-transgender da una prospettiva ecologico-sociale: Effetti sulla salute psico-fisica e strategie di intervento
The present study offers an overview on stigma against transgender people, analyzing its effects on physical and psychological well-being. We adopted a socio-ecological perspective, according to which antitransgender stigma may manifest at different levels: along the environment-individual spectrum, stigma may occur at the institutional, interpersonal and individual level. All these typologies make transgender people a very vulnerable group, at risk for several health problems. Authors will finally overview some specific psycho-social interventions aimed at reducing stress, by matching each level of stigma with internationally well-established good practices
Intraguild interactions between two egg parasitoids of a true bug in semi-field and field conditions
Research on interspecific competitive interactions among insect parasitoids has often been characterized by laboratory studies in which host insects are exposed to female parasitoids of different species in various sequences and combinations. In the last years, an increasing number of studies have investigated interspecific interactions under field and semi-field conditions although just a few number of works focused on egg parasitoids. In this work, we undertook a two-year study to investigate interspecific interactions between Trissolcus basalis (Wollaston) (Hymenoptera: Platygastridae) and Ooencyrtus telenomicida (Vassiliev) (Hymenoptera: Encyrtidae), two egg parasitoids of the pest Nezara viridula (L.) (Heteroptera: Pentatomidae) that co-occur in cultivated crops. Under semi-field (in out-door mesh cages) and field conditions, we investigated: 1) the seasonal occurrence of competing parasitoid species on sentinel egg masses; 2) the impact achieved by competing species on the shared host on naturally laid egg masses; 3) the outcome of intraguild interactions under controlled conditions. Results from sentinel egg masses showed that T. basalis occurs in May and successfully parasitizes hosts until the end of September/beginning of October, whereas O. telenomicida is mainly occurring in July-August. In both years, it was found that T. basalis is predominant. From naturally laid egg masses, results indicated that T. basalis achieves higher impact on the hosts, even in those egg masses which are parasitized by more than one female of different species ( = multiparasitism). Results from manipulating intraguild interactions showed that T. basalis achieves higher impact on N. viridula when released alone, but it suffers from competition with O. telenomicida. The ecological factors that play a role in intraguild interactions in the context of biological control perspective are discussed
Group psychodynamic counselling with final-year undergraduates in clinical psychology: A clinical methodology to reinforce academic identity and psychological well-being
Educational institutions should ensure that students develop a professional identity, as well as safeguarding their well-being and activating awareness and change processes. The aim of this study was to assess the efficacy of group psychodynamic counselling as a means of reinforcing academic identity–considered the forerunner of professional identity–and psychological well-being in a group of final-year undergraduates studying clinical psychology. Thirty-three final-year-students of clinical psychology who participated in six group psychodynamic counselling sessions were compared with sixteen final-year students of clinical psychology who had never participated in an intervention of this kind. The results suggested that group psychodynamic counselling made students feel more capable of managing their lives and more open to new experiences as well as encouraging them to perceive their relationships as more positive and satisfying, to believe that their life is meaningful, and to achieve greater self-acceptance. The in-depth exploration also prompted students to consider their commitment to their choice of career. Group psychodynamic counselling also reinforced students’ educational choice, as the likelihood of students becoming less committed to this choice was reduced after the intervention. Thus, the study confirmed the efficacy of group psychodynamic counselling as a means of reinforcing both academic identity and promoting well-being and demonstrated that it is a tool clinical psychologists and university teachers could use to activate self-reflection and change within educational settings
The Influence of Minority Stress, Gender, and Legalization of Civil Unions on Parenting Desire and Intention in Lesbian Women and Gay Men: Implications for Social Policy and Clinical Practice
Although the rate of lesbian and gay (LG) parents is increasing, lesbian and gay adults are less likely than heterosexual adults to be parents, as desire and intention to become a parent tend to be lower. This study aims at assessing 290 childless LG individuals (120 lesbian women and 170 gay men) to explore the influence of minority stress, gender differences, and legalization of civil unions in Italy on parenting desire and intention. The results indicated that the minority stressors associated with parenting dimensions included prejudice events, outness, and internalized homophobia
for lesbian women, but only felt stigma among gay men. Support from family or significant others buffered the effects of minority stressors on parenting dimensions. Thus, the minority stress processes partly explain the intention and desire to become parents in LG childless individuals. Furthermore, lesbian women showed higher levels of parenting desire and intention than gay men and the levels of these parenting dimensions increased after the law on civil unions was enacted. The findings have important implications for both social policies and clinical practice
“Soccer is a matter of real men?” Sexist and homophobic attitudes in three Italian soccer teams differentiated by sexual orientation and gender identity
During the 1980s and early 1990s, homophobia and sexism were pervasive in sport contexts due to their sex-segregation, male-domination, and heteronormative culture. In the last two decades, a change in attitudes toward gender and sexuality, in particular within typically masculine sports, has been observed. Notwithstanding that, no research assessing if this change also occurred in Italy was conducted. Using semi-structured focus groups and adopting the framework of Inclusive Masculinity Theory, the current study explored sexist and homophobic attitudes in three Italian soccer teams differentiated by gender and sexual orientation. Team 1 comprised openly gay male athletes, Team 2 comprised both lesbian and heterosexual women, and Team 3 comprised heterosexual men. Narratives were analysed through constant comparison analysis. Specific macro-categories were identified in each team, as follows: Team 1: need for affiliation, in/visibility, perceived homophobia, and perceived institutionalised homophobia; Team 2: need for affiliation, masculine dominance, equal opportunities, and crossing gender boundaries; and Team 3: presumption of heterosexuality, female inferiority, and tendency toward a homosocial law. The results suggest that soccer, in Italy, still represents a context organised around men’s dominance over women and the stigmatisation of gay men. Notwithstanding, they suggest also that we are witnessing an interlocutory phase where some heterosexual soccer players are starting to challenge homophobia but, at the same time, women and openly gay players still perceive a homohysteric culture. The discussion is contextualised in the social context where discourses arose
La salute degli anziani LGBT dalla prospettiva del minority stress. Rassegna della letteratura e raccomandazioni di ricerca
Lesbian, gay, bisexual, and transgender (LGBT) older adults have not received proper attention by the scientific literature and gerontology research, especially in Italy. This lack represents only an aspect of a more general condition of social invisibility that weighs on this population. The present contribution aims to provide researchers and clinicians with a review of scientific works which, especially in the USA, have casted light on experiences of stigmatization, discrimination, and victimization experienced and perceived by this population. The theoretical framework is represented by the minority stress perspective which provides an overview of risk and protective factors related to physical and mental health of minority groups. In the current review, authors considered studies conducted through quantitative, qualitative, and mixed methods, starting from 2000. Following the above described perspective, results are presented in two sections: the first one is focused on the different forms of stigma which weigh on LGBT older adults and the second one on the mental and physical health outcomes and on protective factors. The application of the minority stress perspective on LGBT older adults provides researchers and social and health care system providers with a psychosocial and clinical framework through which reading the phenomenon. Finally, main research recommendations are discussed
Group psychodynamic counselling as a clinical training device to enhance metacognitive skills and agency in future clinical psychologists
Metacognitive skills and agency are among the main psychological abilities a clinical psychologist should have. This study aimed to assess the efficacy of group psychodynamic counselling as a clinical training device able to enhance metacognitive skills and agency in final-year undergraduates in clinical psychology within an educational context. Thirty-three final-year students of clinical psychology participated in an experiential laboratory lasting two months. Participants completed measures regarding metacognitive skills and agency at pre-, posttreatment, and 3-month follow-up assessment. The results suggested that group psychodynamic counselling made students feel more capable of recognizing emotional states, understanding causal relationships, inferring mental states of others in terms of beliefs, desires, intentions, and expectations, and thinking critically. Furthermore, the group psychodynamic counselling helped students to feel more able to derive pathways to desired goals and to motivate themselves via agency thinking to use those pathways. Thus, the study confirmed the efficacy of group psychodynamic counselling as a clinical training device able to enhance metacognitive skills and agency in future clinical psychologists
One year of CNR-IMAA multi-wavelength Raman lidar measurements in coincidence with CALIPSO overpasses: Level 1 products comparison
At CNR-IMAA, an aerosol lidar system has operated since May 2000 in the framework of EARLINET (European Aerosol Research Lidar Network), the first lidar network for tropospheric aerosol study on a continental scale. High quality multi-wavelength measurements make this system a reference point for the validation of data products provided by CALIPSO (Cloud-Aerosol Lidar and Infrared Pathfinder Satellite Observations), the first satellite-borne lidar specifically designed for aerosol and cloud study. Since 14 June 2006, dedicated measurements have been performed at CNR-IMAA in coincidence with CALIPSO overpasses. For the first time, results on 1-year comparisons between ground-based multi-wavelength Raman lidar measurements and corresponding CALIPSO lidar Level 1 profiles are presented. A methodology for the comparison is presented and discussed in detail. Night-time cases are considered to take advantage from Raman capability of the ground based lidar. Cases with the detection of cirrus clouds in CALIPSO data are separately analysed for taking into account multiple scattering effects. For cirrus cloud cases, few cases are available to draw any conclusions. For clear sky conditions, the comparison shows good performances of the CALIPSO on-board lidar: the mean relative difference between the ground-based and CALIPSO Level 1 measurements is always within its standard deviation at all altitudes, with a mean difference in the 3–8 km altitude range of (&minus;2&plusmn;12)%. At altitude ranges corresponding to the typical PBL height observed at CNR-IMAA, a mean difference of (&minus;24&plusmn;20)% is observed in CALIPSO data, probably due to the difference in the aerosol content at the location of PEARL and CALIPSO ground-track location. Finally, the mean differences are on average lower at all altitude ranges for the closest overpasses (at about 40 km) respect to the 80-km overpasses
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