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Sentiment analysis and stance detection are key tasks in text analysis, with applications ranging from understanding political opinions to tracking policy positions. Recent advances in large language models (LLMs) offer significant potential to enhance sentiment analysis techniques and to evolve them into the more nuanced task of detecting stances expressed toward specific subjects. In this study, we evaluate lexicon-based models, supervised models, and LLMs for stance detection using two corpuses of social media data—a large corpus of tweets posted by members of the U.S. Congress on Twitter and a smaller sample of tweets from general users—which both focus on opinions concerning presidential candidates during the 2020 election. We consider several fine-tuning strategies to improve performance—including cross-target tuning using an assumption of congressmembers’ stance based on party affiliation—and strategies for fine-tuning LLMs, including few shot and chain-of-thought prompting. Our findings demonstrate that: 1) LLMs can distinguish stance on a specific target even when multiple subjects are mentioned, 2) tuning leads to notable improvements over pretrained models, 3) cross-target tuning can provide a viable alternative to in-target tuning in some settings, and 4) complex prompting strategies lead to improvements over pretrained models but underperform tuning approaches.
We propose a novel multiple-scale spatial marching method for flows with slow streamwise variation. The key idea is to couple the boundary region equations, which govern large-scale flow evolution, with local exact coherent structures that capture the small-scale dynamics. This framework is consistent with high-Reynolds-number asymptotic theory and offers a promising approach to constructing time-periodic finite-amplitude solutions in a broad class of spatially developing shear flows. As a first application, we consider a non-uniformly curved channel flow, assuming that a finite-amplitude travelling-wave solution of plane Poiseuille flow is sustained at the inlet. The method allows for the estimation of momentum transport and highlights the impact of the inlet condition on both the transport properties and the overall flow structure. We then consider a case with gradually decreasing curvature, starting with Dean vortices at the inlet. In this setting, small external oscillatory disturbances can give rise to subcritical self-sustained states that persist even after the curvature vanishes.
The war of 1578–1590 marked a turning point in Ottoman-Safavid relations. It followed thirty-three years of peace and ushered in over half a century of nearly continuous crisis and bloodshed. Militarily, the conflict was centered primarily in the Caucasus, where the Ottomans achieved significant territorial gains, formalized in the Treaty of Constantinople (1590). This war is among the better documented of the Ottoman-Safavid conflicts thanks to a wealth of contemporary sources, particularly from the Ottoman side. However, the lack of contemporary Safavid sources, as well as the neglect of local and global perspectives, has led to a biased and partial understanding, which the present special section seeks to address. Two of this section’s articles focus on the Caucasus campaign of 1578–1579, emphasizing Ottoman interactions with local populations and the daily experiences of ordinary soldiers (Alsancakli and Stevens). Two other articles examine Safavid relations with Russia and the Italian states in the context of a potential anti-Ottoman alliance (Rybar and Trentacoste). All four contributions are based on the presentation and publication or translation of previously unknown or overlooked primary sources.
The Hyphantria cunea (Drury) is a highly polyphagous invasive pest that has become widespread and destructive in China. Although sex pheromone components of H. cunea have been identified, the weak field attraction of synthetic sex pheromone has hindered the application of sex pheromone-based lures in efficient monitoring and management of this pest. In this study, the electroantennographic (EAG) and field responses of H. cunea male adults to three synthetic sex pheromone components, including Z9, Z12, Z15-18Ald (C18:Ald), Z3, Z6-9S,10 R-epoxy-21Hy (C21-2Epo), and 1, Z3, Z6-9S,10 R-epoxy-21Hy (C21-3Epo), were evaluated. Male antennae exhibited significant dose-dependent response to three individual components and a ternary mixtures. The younger and virgin male moths showed stronger electrophysiological activity to synthetic compounds, whereas sensitivity decreased significantly after mating. Among the three components, C21-3Epo elicited the strongest antennal responses. Field trapping revealed that neither single compounds nor binary blends attracted males, whereas only the ternary blend of C18:3Ald, C21-2Epo, and C21-3Epo (ratio 8:1:1; 10 mg total load) effectively captured large numbers of males. In addition, the field trapping indicated that the green rubber septum functioned as a practical dispenser for synthetic pheromones. The Unitraps baited with the green rubber septum showed significantly higher trapping efficiency than cotton wicks, highlighting the septum as a promising dispenser for field deployment of synthetic sex pheromones. Finally, the green rubber septum baited with a ternary blend monitored the dynamics of H. cunea occurrence and detected that the emergence period overlapped with the commercially available synthetic lure. In general, the bioactivity of the synthetic sex pheromone of H. cunea was validated. It could effectively capture H. cunea male adults, be used to monitor and control H. cunea, and further be incorporated into the integrated pest management programme.
The evaluation of usual food intake is of central importance in nutritional epidemiology studies. Some authors propose the usual dietary recall (UDR) as a viable method for assessing usual food intake; however, its characteristics remain poorly understood. The objective of this study is to review the literature on the application and performance characteristics of the UDR as a dietary assessment method. Electronic search strategies were conducted using the Excerpta Medica Database, Publisher Medline, Cochrane Central Register of Controlled Trials, Latin American and Caribbean Health Sciences Literature, Coordination for the Improvement of Higher Education Personnel (CAPES) Periodicals Portal, and Google Scholar. Studies published in Portuguese, English, and Spanish were included, with no restrictions on publication date. Eligible studies included those utilising the UDR in experimental or observational designs, as well as literature reviews. A total of 116 studies were included in the review. The most common application method (n 34; 29·3 %) involved reporting foods typically consumed over a 24-h period. However, most studies (n 66; 56·9 %) did not specify the method for applying the UDR. Key limitations identified included under or overestimation (n 9; 7·8 %), memory bias (n 7; 6·0 %) and the lack of instrument validation (n 5; 4·3 %). Findings show that the UDR lacks a standardised application method, and its validity remains unconfirmed. Future research should establish a standardised protocol and assess its psychometric properties to reduce errors and biases, ensuring accurate dietary assessments in nutritional epidemiology.
This paper is situated within the context of the onset of British imperialism in Nigeria at the end of the nineteenth century, with a particular focus on the conquest of the Ijebu Kingdom. The episode, as discussed in the paper, is intended for stage or screen theatrical adaptation. It demonstrates the value of historical dramatization based on data foregrounded by standard historical and relevant research methodologies. The principal text in the paper, derived from primary and research-based sources, is outlined in a chronological narrative. The general idea is to enable the development of a script to create a historical drama.
L-carnitine is essential for myocardial metabolism, and its depletion may compromise heart function. We conducted a prospective observational study to assess serum carnitine profiles in 26 children under 36 months of age undergoing elective open-heart surgery with cardiopulmonary bypass. Measurements included free carnitine, acylcarnitine, and the acylcarnitine-to-free carnitine ratio, recorded preoperatively and at multiple postoperative time points up to 24 hours. We observed a significant postoperative decline in free carnitine and an increase in the acylcarnitine-to-free carnitine ratio, both of which correlated with cardiopulmonary bypass duration. These results highlight a perioperative disturbance in carnitine metabolism, suggesting potential relevance for postoperative cardiac recovery.
We propose an evolutionary competition model to investigate the green transition of firms, highlighting the role of adjustment costs, state-dependent transition risk, and positive externalities in green technology adoption. Firms base their decisions to adopt either green or brown technologies on relative performance. To incorporate the costs of switching to another technology into their decision-making process, we adopt a novel, ad hoc crafted, replicator dynamics. Our global analysis reveals that increasing transition risk, e.g., by threatening to impose stricter environmental regulations, effectively incentivizes the green transition. Economic policy recommendations derived from our model further suggest maintaining high transition risk regardless of the industry’s level of greenness. Subsidizing the costs of adopting green technologies can reduce the risk of a failed green transition. While positive externalities in green technology adoption can amplify the effects of green policies, they do not completely eliminate the possibility of a failed green transition. Finally, evolutionary pressure reduces the extent of green economic policies required to ensure a successful green transition.
In the paper, we consider a two-dimensional free-surface flow past a single point vortex in fluid of infinite depth. The flow moves from left to right with uniform speed $c$ far upstream and is subject to the downward acceleration $g$ of gravity. A point vortex of circulation $\varGamma$ is located at depth $H$. The positive direction of circulation is counterclockwise. The flow is characterised by two dimensionless parameters which are the dimensionless vortex circulation $\gamma =\varGamma /(\textit{cH}\,)$ and the Froude number $ \textit{Fr}=c/\sqrt {gH}$. The goal of the paper is to find the solutions of the solitary wave type with one or several crests on the free surface. These solutions are waveless far downstream and have a vertical line of symmetry. We have established that for a fixed Froude number $ \textit{Fr}\le 0.8$, there exists a finite set of positive $\gamma$ for which the solutions of the solitary wave type occur.
This study examines public-private partnerships (PPPs) in home- and community-based services (HCBS) for older adults in Guangzhou, China, amid growing efforts to increase non-state actor participation and market mechanisms in welfare provision. Based on semi-structured interviews with non-state actors, this research examines both contractual and relational dimensions of PPPs and why achieving their full potential remains challenging. Findings reveal that state actors maintain a leading role in PPPs, with non-state actors primarily positioned as implementers of predefined welfare objectives. The power imbalance embedded in China’s sociopolitical context blurs the boundaries among the Party, state, and society, shaping coordination challenges in PPPs. These structural constraints hinder integrated service delivery and limit the extent to which PPPs can meaningfully leverage the expertise of various actors. This study enhances understanding of PPPs in China’s authoritarian, state-led market context and offers insights into the evolving landscape of welfare socialisation reforms.
Divine simplicity is plausibly seen as a biblical doctrine, given a standard account of the way doctrine is derived from Scripture. The polemic of Jeremiah 10 against ancient Near Eastern mis pî or ‘mouth opening’ rituals involves a commitment to a radical account of divine aseity. In dialogue with Thomas Aquinas and a number of contemporary figures, I suggest this view of divine aseity might plausibly be thought to lead to the inference to divine simplicity.
While early-life adverse experiences have been linked to late-life cognitive decline, few studies have explored war exposure. Paradoxically, one study even indicated a late-life cognitive advantage of early-childhood war exposure. In the present study, we explored these associations.
Methods:
We examined older adults exposed to World War II (1940–1944; n = 1179) and the subsequent Civil war (1946–1949; n = 962) in Greece during early and middle childhood with a comprehensive neuropsychological assessment and for ApoE-ε allele status, including demographic information and medical history.
Results:
Higher cognitive performance in language tasks predicted middle childhood, relative to early childhood, WWII-exposure group membership (B = .316, p = .038, OR:1.372, 95%CI:1.018–1.849), primarily for men, while higher attention/speed (B = .818, p = .002, OR:2.265, 95%CI:1.337–3.838) and total cognitive score (B = .536, p = .040, OR:1.709, 95%CI:1.026–2.849) were predictors of belonging to the middle-childhood group, only in men. Individuals who did not meet criteria for Mild Cognitive Impairment (MCI)/dementia were more likely to belong to the middle-childhood war-exposure group. Similarly, for the Civil war, higher cognitive scores and reduced likelihood to meet criteria for MCI/dementia were predictors of middle, relative to early childhood war exposure group membership (visuospatial score: B = .544, p = .001, OR:1.723, 95%CI:1.246–2.381, MMSE: B = .134, p = .020, OR:1.143, 95%CI:1.021–1.297), primarily for women. Results remained consistent when adjusting for multimorbidity, sex, education, current age, depression, and anxiety.
Conclusion:
The present findings suggest that better cognitive performance and lower likelihood of MCI or dementia were associated with being exposed to significant hardships, such as war, during middle childhood, regardless of potentially confounding factors. Further studies are needed to shed light on this relationship.
Granular flow down an inclined plane is ubiquitous in geophysical and industrial applications. On rough inclines, the flow exhibits Bagnold’s velocity profile and follows the so-called $\mu (I)$ local rheology. On insufficiently rough or smooth inclines, however, velocity slip occurs at the bottom and a basal layer with strong agitation emerges below the bulk, which is not predicted by the local rheology. Here, we use discrete element method simulations to study detailed dynamics of the basal layer in granular flows down both smooth and rough inclines. We control the roughness via a dimensionless parameter, $R_a$, varied systematically from 0 (flat, frictional plane) to near 1 (very rough plane). Three flow regimes are identified: a slip regime ($R_a \lesssim 0.45$) where a dilated basal layer appears, a no-slip regime ($R_a \gtrsim 0.6$) and an intermediate transition regime. In the slip regime the kinematics profiles (velocity, shear rate and granular temperature) of the basal layer strongly deviate from Bagnold’s profiles. General basal slip laws are developed that express the slip velocity as a function of the local shear rate (or granular temperature), base roughness and slope angle. Moreover, the basal layer thickness is insensitive to flow conditions but depends somewhat on the interparticle coefficient of restitution. Finally, we show that the rheological properties of the basal layer do not follow the $\mu (I)$ rheology, but are captured by Bagnold’s stress scaling and an extended kinetic theory for granular flows. Our findings can help develop more predictive granular flow models in the future.
Political misinformation represents a challenge to contemporary democracies. It is widely acknowledged that misinformation is not only spread by individual users on social media, but also by politicians employing both digital and legacy media to disseminate biased or misleading content to advance their political agendas. This study explores the mechanisms through which misinformed statements made by politicians influence public opinion and examines the effectiveness of corrections from academic/official sources or fact-checking websites, also focusing on the role of partisanship. We investigate whether agreement with a misinformed statement on key policy issues – minimum wage, COVID-19 vaccination, and working hours – increases when it is attributed to a politician, and whether corrections by academic/official sources or fact-checkers reduce agreement. Through survey experiments conducted in Italy, we find that while misinformation from politicians does not always affect agreement with false statements, corrections generally decrease agreement. However, partisanship plays a crucial role, with individuals more likely to resist correction when misinformation comes from politicians they have more positive feelings toward. These findings shed light on the complex relationship between misinformation, the effectiveness of corrective messages, and political identity in shaping public opinion.