45,980 research outputs found
Right Inverses of linear maps on convex sets
No full textWe study, via continuous selections of multivalued maps, the problem of finding a right inverse to the restriction of a linear map to a convex body.
Let be a convex body in a finite dimensional real space and let a (continuous) linear surjection, where is also a real vector space. We address here the problem of finding a continuous function such that for every (i.e. a right inverse of the restriction ). This has interesting applications: for example, when with and convex body in and the sum in , can we find with ? \\We try to partially solve these kind of problem using convex closed multivalued mappings and in particular Michael theorem
R codes for "Plant functional traits couple with range size and shape in European trees" (Midolo, 2024)
No full textSupplementary R codes for:Midolo, G. (2024) Plant functional traits couple with range size and shape in European trees. Global Ecology and Biogeography https://doi.org/10.1111/geb.13838Author: Gabriele Midolo11: Department of Spatial Sciences, Faculty of Environmental Sciences, Czech University of Life Sciences Prague, Praha-Suchdol, Czech RepublicORCID: https://orcid.org/0000-0003-1316-2546e-mail: gabriele.midolo [at] gmail [dot] comContent description:getRLI.function.R: This code contains the function to calculate range shape (elongation) using Range Linearity Index (RLI).Related references:Graves, G. R. (1988). Linearity of Geographic Range and Its Possible Effect on the Population Structure of Andean Birds. The Auk, 105(1), 47–52. https://doi.org/10.1093/auk/105.1.47Pigot, A. L., Owens, I. P. F., & Orme, C. D. L. (2010). The environmental limits to geographic range expansion in birds. Ecology Letters, 13(6), 705–715. https://doi.org/10.1111/j.1461-0248.2010.01462.xrun.MRPMM.R: A reproducible example on how to run multi-response phylogenetic mixed effect models (MR-PMMs).Related references:Halliwell, B. & Yates, L. A. (2024) Multi-Response Phylogenetic Mixed Models. GitHub. https://benjamin-halliwell.github.io/MR-PMM/MR-PMM_tutorial.html [Accessed on March 2024]Halliwell, B., Yates, L. A., & Holland, B. R. (2022). Multi-Response Phylogenetic Mixed Models: Concepts and Application. BioRxiv. https://doi.org/10.1101/2022.12.13.520338Housworth, E. A., Martins, E. P., & Lynch, M. (2004). The Phylogenetic Mixed Model. The American Naturalist, 163(1), 84–96. https://doi.org/10.1086/380570Westoby, M., Yates, L., Holland, B., & Halliwell, B. (2023). Phylogenetically conservative trait correlation: Quantification and interpretation. Journal of Ecology, 111(10), 2105-2117 https://doi.org/10.1111/1365-2745.1415</p
The vulnerability of insecure minds: The mediating role of mentalization in the relationship between attachment styles and psychopathology
No full textInsecure attachment is linked to mentalizing difficulties and psychopathology. The current study aimed to examine if failures in mentalization, as observed in the form of uncertainty about mental states, mediated the relationship between attachment styles and global psychopathology in a group of 812 adults (66.5% females) from the community. Participants completed measures on attachment styles, uncertainty about mental states, and clinical symptoms. The authors found that uncertainty about mental states was a partial mediator of the associations between attachment styles and psychopathology. Furthermore, the findings supported the role of secure attachment in protecting from mentalization failures and psychopathology; on the contrary, increased scores on attachment styles involving a negative view of the self (preoccupied and fearful attachment styles) predicted high levels of uncertainty about mental states and psychopathology. Accordingly, clinicians may wish to promote mentalizing abilities in individuals who display a negative view of the self embedded in their attachment styles
Impulsivity and alexithymia in virtual worlds: A study on players of World of Warcraft
No full textObjective: Symptoms of problematic Internet use (PIU) may be increased in people who display an excessive involvement in Massively Multiplayer Online Role-Playing Games (MMORPGs). Notably, impulsivity and alexithymia have not been investigated together in the literature addressing the predictors of PIU among gamers, despite evidence that these personality traits may play a pivotal role in the development of problematic gaming patterns. The purpose of this research was to explore the relationship between facets of alexithymia and impulsivity and PIU scores among MMORPG players. Method: In the current study, 364 World of Warcraft (WoW) players (272 males, 74.7%) aged 18 to 48 years old provided socio-demographic information and completed questionnaires on PIU, time spent online playing WoW, alexithymia, and impulsivity. Results: PIU scores were negatively associated with age and positively associated with alexithymia scores, impulsivity scores, and time spent online playing WoW. A linear regression analysis showed that PIU scores were predicted by time spent online playing WoW, the alexithymic features concerning difficulties identifying and describing feelings, and attentional impulsivity. Conclusions: Our findings suggest that MMORPG players with difficulties concerning affect awareness and a tendency to be distracted by novel stimuli may spend an excessive amount of time playing video games and may also show prominent symptoms of PIU
Schooling and education.
No full textSchooling and education by Giles R. Wright with Howard L. Green and Lee R. Parks. Number 4 in the New Jersey Ethnic Life Series. Published by New Jersey Historical Commission
Limph node micrometastases in patients with adenocarcinoma of the esophagogastric junction.
No full textSignificato prognostico delle micrometastasi linfonodali nell'adenocarcinoma esofageo
No full textThe aim of the study was to test the hypothesis that a subgroup of patients considered N0 at standard single-section pathological examination may have occult lymph-node metastases (micrometastases) associated with a poor prognosis. Fifty-nine patients with oesophageal adenocarcinoma undergoing resection were studied by standard histological examinations, serial sections and immunohistochemistry, and their long-term prognoses were compared. Eight (26%) out of 31 patients previously staged as pN0 at standard histological examination were staged as pN1 or Pn2 by serial sections and/or immunohistochemistry and had a prognosis which was significantly worse than that of true pN0 patients (5-year survival: 38% vs 76%, respectively; P < 0.05) and similar to that of pN1 patients. More than a quarter of those patients classified as pN0 at standard histological examination may have occult lymph node metastases at serial sections and/or immunohistochemistry and have a prognosis similar to that of pN1 patients
Childhood trauma, attachment and psychopathology: A correlation network approach
No full textConsistent evidence supports the view that childhood trauma is linked with insecure attachment styles and psychopathology. However, it is a matter of debate how different forms of child maltreatment may relate with dimensions of anxiety and avoidance in attachment relationships and may foster specific configurations of clinical symptoms. Accordingly, examining the associations between childhood trauma, insecure attachment and psychopathology from a correlation network perspective may serve to fill a relevant gap in the literature. Three-hundred fifty-two adults aged between 18 and 73 years old (M= 32.70; SD = 11.72) completed measures on child maltreatment, attachment styles and psychopathology. A regularized partial correlation network was estimated to examine the relationships between the three constructs. The network showed 101 out of 190 nonzero correlations linking childhood traumatic experiences, anxious and avoidant attachment dimensions, and clinical symptoms. The analysis of the network showed that being exposed to emotional abuse and emotional neglect increased the risk of being exposed to other types of childhood trauma, such as physical abuse. Anxious attachment was more strongly linked to child maltreatment and psychopathology than avoidant attachment. Suicidal ideation and maladaptive personality functioning were the clinical symptoms most strongly connected with the other variables in the network. These findings might be relevant for the assessment and treatment of individuals who display clinical problems related to insecure attachment and early relational trauma
Attached to Virtual Dreams: the Mediating Role of Maladaptive Daydreaming in the Relationship between Attachment Styles and Problematic Social Media Use
No full textMaladaptive daydreaming describes excessive fantasy activity that interferes with an individual's life. Surprisingly, the precursors of maladaptive daydreaming and its role in excessive involvement in virtual worlds have been scarcely investigated. In the current study, we examined the relationships among attachment styles, maladaptive daydreaming, and problematic social media use (PSMU) in a sample of community-dwelling adults. Eight hundred seventy-seven participants between 18 and 68 years old were recruited via an online survey and asked to fill out self-reported measures on attachment styles, maladaptive daydreaming, and PSMU. Mediation analyses showed that maladaptive daydreaming is a significant mediator in the relationships between preoccupied and fearful attachment styles and PSMU, suggesting that maladaptive daydreaming partly explains the established link between insecure attachment styles and excessive use of social media. Individuals with PSMU fostered by maladaptive daydreaming may benefit from clinical interventions that promote the use of adaptive regulatory strategies to develop feelings of security and self-confidence that may serve to reduce the excessive involvement in social media
Significato biologico delle micrometastasi linfonodali e midollari nel carcinoma esofageo
No full textThe aim of the study was to test the hypothesis that a subgroup of patients considered N0 at standard single-section pathological examination may have occult lymph-node metastases (micrometastases) associated with a poor prognosis. Fifty-nine patients with oesophageal adenocarcinoma undergoing resection were studied by standard histological examinations, serial sections and immunohistochemistry, and their long-term prognoses were compared. Eight (26%) out of 31 patients previously staged as pN0 at standard histological examination were staged as pN1 or Pn2 by serial sections and/or immunohistochemistry and had a prognosis which was significantly worse than that of true pN0 patients (5-year survival: 38% vs 76%, respectively; P < 0.05) and similar to that of pN1 patients. More than a quarter of those patients classified as pN0 at standard histological examination may have occult lymph node metastases at serial sections and/or immunohistochemistry and have a prognosis similar to that of pN1 patients
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