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Political representation is challenged by social acceleration, the rise of populism, and electoral volatility. Politicians’ need for prioritizing time and energy is acute and consequential for democracy. Voters’ preferences constitute one democratically relevant standard for guiding such priorities. However, current research mainly focuses on voters’ preferences for representatives’ personality traits or policy outcomes, which are hard for an individual politician to control. This study provides a conceptual framework for analyzing politicians’ task priority by separating functional legislative tasks from relational representative tasks, and employs this framework in surveys among Danish, German, UK, and US voters. Analyses of open-ended answers, time allocations, and conjoint experiments show that voters assign higher importance to functional tasks compared to relational tasks. The framework offers a new approach to studying political representation in practice, and the results provide guidance for how politicians should prioritize scarce resources for political representation in a high-speed, volatile political context.
Common ragweed (Ambrosia artemisiifolia L.) is a globally distributed, difficult to control weed that can cause severe crop yield losses if not properly managed. Clopyralid is a synthetic auxin herbicide widely used to control A. artemisiifolia and other Asteraceae weeds. In 2016, a highly clopyralid-resistant A. artemisiifolia population, which we call AMBEL-40, was reported on a Michigan Christmas tree farm. We investigated the inheritance and potential clopyralid resistance mechanisms in this population using greenhouse dose–response assays; test crosses with a susceptible line—AMBEL-39; and RNA-seq. The ED50 values for AMBEL-40 and AMBEL-39 were 2,110.8 and 74.5 g ha−1, respectively; therefore, the resistant/susceptible ratio is 28.3. Dose–response results with triclopyr, fluoxypyr, 2,4-D, or dicamba demonstrate no multiple or cross-resistance in AMBEL-40. AMBEL-40 and AMBEL-39 crossed F1 generations (M3F1, M3F2, and M1F1) showed increased resistance compared with AMBEL-39, with ED50 values of 1,379.2, 1,134.0, and 542.5 g ha−1. Chi-square tests of three sib-mated F1 to generate F2 generations rejected a single-gene 1:3 model and supported a two-gene 3:13 segregation, consistent with multigenic inheritance. We identified 23 Aux/IAA transcripts containing the degron (IAA protein subdomain) sequence in the published A. artemisiifolia genome; of these, three contained polymorphisms in our RNA-seq data, but none consistently co-segregated with resistance. Differential expression analysis identified 70 genes with 39 upregulated and 31 downregulated in AMBEL-40, including candidates in auxin/ethylene signaling, metabolism, cuticular wax biosynthesis, and stress modulation, supporting a non–target site resistance mechanism. Together, these results indicate that clopyralid resistance in A. artemisiifolia is recessive and multigenic, with potentially altered signaling, metabolism, and uptake as a mechanism of resistance rather than a single Aux/IAA degron mutation.
Melting alpine ice threatens (pre)historic archaeological sites. Current trends suggest loss of ice will continue. Here, we present recent fluctuations in yearly minimum extent from 2017 to 2024 for three central Norwegian ice patches: Storhornet, Elghøa and Lågtangan. We discuss how melting ice affects their archaeological potential and introduce the term ghost patch to describe archaeological ice patch sites no longer containing ice. Future archaeological fieldwork prioritization must account for ice patch to ghost patch transitions. We suggest updated archaeological approaches for a future with less and less ice.
Depressive symptoms are closely associated with cognitive decline and risk of incident dementia, and plasma biomarkers may play a significant role in this relationship. We aimed to investigate the influence of plasma biomarkers and explore the underlying mechanisms.
Methods
This study included 1,658 dementia-free community residents recruited in 2009–2011 from the Shanghai Aging Study. At baseline, we assayed plasma phosphorylated tau 217 (p-tau217) and neurofilament light chain (NfL), and assessed depressive symptoms using the Center for Epidemiologic Studies Depression scale. Cox regression models were performed to estimate the risks of incident dementia and Alzheimer’s disease (AD) during the 5-year follow-up. Parallel and serial mediation models were applied to investigate whether plasma p-tau217 and NfL mediated the relationship between depressive symptoms and cognitive decline.
Results
Older adults with depressive symptoms had higher risks of dementia and AD, especially among those with higher concentrations of baseline plasma p-tau217/NfL. Sex-specific analysis revealed that depressive symptoms combined with high plasma NfL increased AD risk in men (hazard ratio, HR [95% confidence interval, CI] = 5.89 [2.01, 17.27], p = 0.001), whereas women with depressive symptoms and high plasma p-tau217 showed higher AD risk (HR [95%CI] = 6.07 [2.82, 13.09], p < 0.001). Parallel mediation analysis revealed that plasma p-tau217/NfL mediated the relationship between depressive symptoms and cognitive decline, respectively. Additionally, serial mediation analysis found p-tau217 precedes NfL within the mediating pathway (β = 0.403, bootstrap 95% CI: 0.347, 0.452).
Conclusions
Plasma p-tau217 and NfL could individually or jointly mediate the relationship between depressive symptoms and cognitive decline.
Lewin and colleagues’ article in this journal gives a good overview of how artificial intelligence (AI) is contributing to the reshaping of mental healthcare. However, a deeper focus on the synergies between different approaches to AI and its goals is needed. This commentary aims to further consider the unique implications of digital mental health approaches, including predictive, explainable and generative AI, for both research and clinical objectives.
CHD are structural cardiac anomalies which are a leading cause of childhood mortality and morbidity in India and have multifactorial aetiology. Compromised socioeconomic status augments several environmental stressors and is shown to have a positive association with CHD in offspring. The presented study is an institution-based case-control study to explore the same with CHD as the primary outcome.
Methods:
A total of 2064 paediatric patients (1760 CHD cases and 304 controls with structurally normal hearts) were analysed. Demographic and socioeconomic status parameters were recorded using the Kuppuswamy scale. Statistical associations were examined using chi-square tests and odds ratios.
Results:
Majority of all patients belonged to the upper-lower class. No significant association was found between socioeconomic status and CHD (p = 0.18). However, rural residence was significantly associated with a higher risk of CHD (χ2 = 16.09, p = 0.0011; OR vs. urban = 1.59). A significant association was found between maternal education and CHD prevalence (χ2 = 20.9, p = 0.0001), with uneducated mothers having higher odds of children with CHD. Joint family structure also showed higher odds of having a child with CHD (OR = 1.75, p < 0.001).
Conclusion:
While socioeconomic status alone was not significantly associated with CHD in this cohort—likely due to universal free care at our institute—maternal education, rural residence and family structure emerged as critical determinants. These findings highlight the need for targeted public health initiatives focusing on maternal literacy, rural healthcare access, and awareness programmes to improve early CHD diagnosis and outcomes. Further population-based research is needed to elucidate socioeconomic status-CHD associations at a broader level.
After presenting Boyle’s appeal to the Sartrean notion of nonpositional self-awareness in explaining Evans’ “transparency fact” concerning self-knowledge, I argue that his explanation suffers a certain instability. To the extent that nonpositional self-awareness is taken to be a matter of first-order ‘transparent’ orientation to the world, Boyle’s suggestion concerning the character of explicit positional self-knowledge is compromised. On the other hand, to the extent that nonpositional awareness is regarded as a form of genuine self-awareness, his explanation overintellectualizes first-order mental states. I conclude by raising questions regarding Boyle’s success in providing a viable alternative to epistemic accounts of basic self-knowledge.
This essay examines the Army’s efforts to cultivate and gain congressional support for the GI Bill in the 1980s. Focusing on the relationship between Representative Sonny Montgomery, senior Army leaders like Maxwell R. Thurman and Robert Elton, and the staffers who worked for each of them, it illustrates the intentionality with which Army leaders worked to cultivate congressional support for and to head off congressional and presidential opposition to a bill that they saw as essential. Analyzing their public and private efforts at critical moments when the legislation was imperiled reveals that relations between the Army and Congress are more intricate than testimony at hearings and budget requests might reveal, that throughout the 1980s, Army leaders remained deeply concerned about sustaining the All-Volunteer Force, and that the ultimate success of that force and the legislation that helped ensure it rested with individuals who built and then leveraged personal relationships.
A chemical explosion and fire erupted in Conakry, Guinea, West Africa on December 18, 2023, destroying Guinea’s main fuel depot and resulting in 25 dead and 459 injured. Fifteen of the deaths occurred directly at the explosion site. Firefighters initiated efforts to control the blaze and transported injured, non-ambulatory victims to local hospitals with assistance from the military, Red Cross, and mining companies. Thirteen clinical facilities within an eight-mile radius of the explosion received burn and non-burn victims, with only one of these, Donka National Hospital, capable of handling burn victims. Many less seriously injured victims self-selected where they sought care, although anecdotal information indicates that an unknown number of injured did not seek care or chose to leave the city. The disaster marked the first time stakeholders from various sectors in the Guinean society (from first responders to mining companies) came together in a concerted response. Ranked 179th of 193 countries on the Human Development Index (HDI), the disaster rapidly outstripped Guinea’s response and health care capabilities, leaving behind economic shocks affecting livelihoods and the local economy. These experiences underscore the need for improved capabilities and coordination in disaster planning, warning and communication systems, and prehospital and hospital response in developing countries.
To understand how the Go Wish Cards Game (GWCG) can support the expression of values, wishes, and preferences at the end of life among women living with advanced breast and/or gynecological cancer.
Methods
This descriptive qualitative study was conducted as part of a larger randomized clinical trial. Participants were recruited from a leading cancer center in Brazil and invited to sort the GWCG cards into three categories: “very important,” “somewhat important,” and “not important.” The 10 cards rated as “very important” were discussed individually to explore their meanings. At the end of the session, participants were asked: “What did it mean for you to play the cards?” Narratives associated with the “very important” cards were analyzed using content analysis based on Bardin’s methodological framework.
Results
Thirty-three women completed the GWCG. Participants described the game as a meaningful opportunity for reflection, communication, and expression of personal values and end-of-life wishes. Discussions of the “very important” cards elicited narratives focused on trust-based relationships, emotional and spiritual support, dignity, and relief from suffering. The most frequently selected cards included wishes such as “to have a doctor I trust and nurses who care about me” and “to have my family and friends with me,” reflecting shared priorities across narratives. Values and wishes were organized into three overarching dimensions: emotional and existential connections; dignity and autonomy; and care and comfort at the end of life. The GWCG was perceived as a valuable tool for facilitating the expression of biopsychosocial and spiritual values.
Significance of results
The findings indicate that the GWCG supports reflection and the articulation of end-of-life values, wishes, and priorities, particularly those related to dignity, autonomy, comfort, and emotional connection. The tool shows potential to promote meaningful conversations and care aligned with what gives purpose and meaning to women living with advanced cancer.
People diagnosed with schizophrenia can have functional impairments in multiple domains. Cognitive impairment is central to schizophrenia and has substantial prognostic value compared with other symptoms of schizophrenia. However, no study has previously investigated directed relationships in a complex system of cognitive, sociodemographic, clinical and quality of life (QOL) variables in people diagnosed with schizophrenia.
Aims
To identify the complex relationships of components of cognition with other cognitive components, as well as with clinical and QOL variables.
Method
This study included data from 1450 participants in the Clinical Antipsychotic Trials of Intervention Effectiveness (CATIE) study. The present study reconstructed a Bayesian network from this data using cognition, clinical, sociodemographic and QOL variables.
Results
Processing speed was centrally associated with all other cognitive domains. Cognitive domains were conditionally independent of positive symptoms but moderately associated with negative symptoms (β = −0.25; P < 0.001). The positive symptoms subscale was independent of QOL, conditioning on third variables. Negative symptoms were moderately associated with QOL (β = −0.33; P < 0.001), and processing speed had a weak association with QOL (β = −0.12; P < 0.001). Processing speed was a central variable in the network.
Conclusions
Intervening with respect to processing speed may be the most beneficial way of improving other cognitive functions. More research is needed on directed networks that include social cognition and global levels of functioning.
Neurodivergence encompasses neurodevelopmental conditions including autism, attention-deficit hyperactivity disorder (ADHD) and Tourette syndrome. Particular physical traits, notably those linked to joint hypermobility, have an established association with both neurodivergence and bipolar affective disorder.
Aims
This case-control study tested, first, whether the presence of joint hypermobility predicted bipolar affective disorder and, secondly, whether neurodivergent characteristics were important in understanding this relationship.
Method
Data were collected from 52 participants with self-reported clinical diagnoses of bipolar affective disorder and from a comparison group of 54 participants without diagnosis of bipolar affective disorder. All participants were assessed on screening instruments for autism (Ritvo Autism Asperger Diagnostic Scale; RAADS-R), ADHD (Wender Utah Rating Scale; WURS) and joint hypermobility. Group differences were explored, and odds ratios calculated for the presence of bipolar and neurodivergence given the presence of hypermobility. A mediation analysis was performed to determine the contribution of neurodivergent characteristics to the relationship between joint hypermobility and bipolar affective disorder.
Results
The presence of joint hypermobility significantly predicted the presence of bipolar disorder (odds ratio 5.1; 95% CI = 2.1, 12.4). In the bipolar affective disorder group, the prevalence of likely autism and ADHD was greater (84.6 and 65.4% respectively) than in the comparison group (22.2 and 3.7% respectively). The odds ratio for a diagnosis of bipolar affective disorder was 18.2 (95% CI = (6.70, 49.41)) in those meeting the threshold for likely autism; and 46.89 (95% CI = 9.96, 220.74) in participants meeting the threshold for likely ADHD. Mediation analysis showed that autistic, ADHD and pooled neurodivergent characteristics mediated the link between joint hypermobility and bipolar affective disorder.
Conclusions
This suggests a potential mechanism for affective pathophysiology, through developmental characteristics associated with joint hypermobility. The appreciation of interacting physical and neurodivergent traits to the expression of psychiatric illness has implications for diagnostic formulation, personalised medicine and service design.
This study was conducted to investigate the effects of blended oils with a balanced n-6/n-3 PUFA ratio of 6:1 and unsaturated fatty acid/SFA (UFA/SFA) ratio of 2·5:1 on growth performance and intestinal health in lipopolysaccharide (LPS)-challenged piglets. One hundred and twenty piglets were selected and randomly assigned to two treatments (2 % soybean oil or 2 % blended oils). On day 28, the experiment was conducted as a 2 × 2 factorial arrangement of treatments, including dietary treatment (2 % soybean oil v. 2 % blended oil) and LPS challenge (saline v. LPS). The results showed that the blended oils supplementation increased average daily gain and average daily feed intake during 1–14 d (P < 0·05), and reduced feed to gain ratio in the whole experimental period (P < 0·05). In addition, the blended oils supplementation improved intestinal morphology, increased maltase and sucrase activities and alleviated inflammation response in the intestine. Moreover, the blended oils supplementation increased proliferating cell nuclear antigen mRNA expression in jejunum and Ki67 mRNA expression in ileum (P < 0·05) in both saline-treated piglets and LPS-challenged piglets. The blended oils reduced C-myc and caspase-3 mRNA expressions and increased Axin2 and Cyclin d1 mRNA expressions after LPS challenge (P < 0·05). In conclusion, the blended oils can improve growth performance and promote intestinal health in piglets.
Factor analysis models explain dependence among observed variables by a smaller number of unobserved factors. A main challenge in confirmatory factor analysis is determining whether the factor loading matrix is identifiable from the observed covariance matrix. The factor loading matrix captures the linear effects of the factors and, if unrestricted, can only be identified up to an orthogonal transformation of the factors. However, in many applications, the factor loadings exhibit an interesting sparsity pattern that may lead to identifiability up to column signs. We study this phenomenon by connecting sparse confirmatory factor analysis models to bipartite graphs and providing sufficient graphical conditions for identifiability of the factor loading matrix up to column signs. In contrast to previous work, our main contribution, the matching criterion, exploits sparsity by operating locally on the graph structure, thereby improving existing conditions. Our criterion is efficiently decidable in time that is polynomial in the size of the graph, when restricting the search steps to sets of bounded size.
Social connections might be protective against depressive and anxious symptoms and dementia in later life. The extent to which social connections are heritable versus modifiable in older age remains unknown.
Aims
We aimed to investigate the heritability of social connections and their influence on mental and cognitive health over time among older adults in a longitudinal cohort.
Method
We analysed data from the Older Australian Twins Study (333 monozygotic, 266 dizygotic twins; 65+ years) at three time-points over 6 years. We examined the factor structure and heritability of baseline social connections and their associations with mental and cognitive health longitudinally.
Results
We found three weakly heritable social connections factors: (a) interacting with friends/neighbours/community (h2 = 0.09, 95% CI: 0.00, 0.44); (b) family interactions/childcare (h2 = 0.13, 95% CI: 0.00, 0.43); (c) involvement in religious groups/caregiving (h2 = 0.00, 95% CI: 0.00, 0.19). Strong genetic correlations were observed between depressive symptoms and factors a (r = −0.96) and b (r = −0.60). More frequent baseline interactions with friends/neighbours/community were associated with fewer depressive symptoms cross-sectionally (B = −0.14, p = .004) and longitudinally (B = −0.09, p = 0.006), but the associations between social connections and cognitive health were not significant.
Conclusions
Social connections were weakly heritable, suggesting large environmental determination. Connections with friends/neighbours/community were associated with better mental health cross-sectionally and over time.