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The dynamics of a fluid flow about its limit cycle can be analysed through phase reduction analysis – an approach that distils a high-dimensional dynamical system to its scalar phase dynamics. This technique provides insights into phase sensitivity, revealing the mechanisms that advance or delay phase dynamics. The phase-based reduced-order model derived from this approach serves as a foundation for identifying lock-on conditions and designing flow control techniques. Recent work by Sumanasiri et al. (J. Fluid Mech. vol. 1020, 2025, R4) applied phase reduction analysis to the fluid–structure interaction problem of aerofoil flutter in a free stream. Their analysis systematically changed the stiffness of the structural dynamics to decipher the phase dynamics mechanism of flutter. Moreover, they considered the use of optimised heaving motion to suppress the emergence of flutter. Their approach opens new avenues for modifying flow physics through innovative modifications of material properties and structural dynamics.
The bestselling book, If Christ Came to Chicago, was published in 1894. It was a work of sensationalist, exposé journalism, documenting with titillating details the city’s rampant vice, dire social problems such as unemployment and homelessness, and corrupt officials and politicians. The book was, among other things, a contribution to the Social Gospel movement. It even inspired Charles M. Sheldon’s bestselling novel, In His Steps (1896), with its refrain, “What would Jesus do?” The author of If Christ Came to Chicago, W. T. Stead (1849–1912), however, was an Englishman. Stead’s earlier efforts at the New Journalism had been focused upon London, including his “Maiden Tribute of Modern Babylon” articles and ghostwriting In Darkest England and the Way Out (1890) for the founder of the Salvation Army, William Booth. When he turned to the Windy City, however, Stead was attacked for being an interloper, a foreigner who should not have presumed to pronounce a harsh judgment upon an American city. One of his responses to this charge was to try to recast himself as an insider through evoking the category of “our common English-speaking race.” This article explores transatlantic crossings, collaborations, and condemnations. Stead himself died in one of the greatest failed transatlantic crossings of the twentieth century, the sinking of the Titanic.
This study aimed to evaluate patients with beta thalassaemia major using the cardiac electrophysiological index of balance, a new electrocardiography parameter, and to predict ventricular arrhythmias.
Methods:
In this study, 60 beta thalassaemia major and 60 healthy children were included. All patients were evaluated with echocardiography. P-wave dispersion, repolarisation times, repolarisation dispersion times, and cardiac electrophysiological balance index were measured using 12-lead electrocardiography. Heart rate variability parameters were evaluated with a 24-hour Holter electrocardiography.
Results:
Left ventricular functions were similar between the groups. Although repolarisation times (QT, JT, and JTp) were significantly lower in the beta thalassaemia major group, heart rate-corrected repolarisation times were similar. Except for Tpe/QT, which is one of the repolarisation dispersion parameters, the other parameters were similar. The heart rate-corrected cardiac electrophysiological index of balance ratio was significantly higher in the beta thalassaemia major group. QRS duration and QRS-dispersion duration (QRS-d) were similar between the groups. There was a correlation between blood ferritin levels and LVmass-i, Tpe/QT, Tpe/QTc, QTc/QRS ratio, and QT, JT, and JTp values.
Discussion:
Patients with beta thalassaemia major are at high risk for ventricular arrhythmia due to a high QTc/QRS ratio, despite normal left ventricular systolic, diastolic, and autonomic function in the early period. We believe that there is a moderate correlation between blood ferritin levels and the QTc/QRS ratio and that the QTc/QRS ratio can provide important information for the follow-up and evaluation of patients with beta thalassaemia major.
Conclusions:
Despite normal early ventricular function in the beta thalassaemia major group, they were at high risk of ventricular arrhythmias.
Macella, specialized market structures built in various urban centers in Roman Italy and the provinces between the Middle Republic and the Late Antique period, have been interpreted widely as urban symbols of elite prestige and conspicuous consumption. While it is true that elites often acted as benefactors of these buildings and written sources emphasize the sale of luxury foods, documentary and archaeological evidence suggest that bureaucratic incentives played a crucial role in their initial establishment. This article presents a new interpretation of the development of macella and argues, in contrast to traditional views, that these markets were not primarily designed as spaces of luxury consumption catering exclusively to elite customers. Rather, they were conceived as physical and permanent institutional control mechanisms over urban food trade in an increasingly complex and integrated Roman economy.
It has already been three years since millions of Ukrainians found refuge in other countries. In our longitudinal research, we examine in what way the main news websites in Poland and Czechia portray Ukrainian refugees and through that how they contribute to their social construction as a group deserving or undeserving of societal and public policy support. Data were collected from platform X, focusing on the accounts of the five most popular news websites in each country. In 2022, we expanded CARIN to CARIN+A, highlighting assistance as a booster (Zogata-Kusz, Öbrink Hobzová, and Cekiera, 2023). Now, examining the period between February 24, 2023, and July 31, 2024, we formulate a hypothesis of dimension content modification, i.e. the meaning of deservingness dimensions change over time for the same target group. Both countries exhibited similar themes and narratives. This was most visible in the attitude and reciprocity, although identity was also important. While at the beginning of the invasion the question of deservingness tied to who they are, later how they behave became crucial. Additionally, we observed normalisation of the situation, without compassion fatigue. Longitudinal media analysis is rare but crucial for countering xenophobia and nationalism.
This study examines overlooked or underexplored fragments from Rufus of Ephesus’ On Melancholy, as cited in Abū Bakr Muḥammad b. Zakariyyāʾ al-Rāzī’s seminal medical work, The Comprehensive Book (Kitāb al-Ḥāwī fī al-Ṭibb). Through an analysis of Arabic texts and Latin translations, we present two previously unexamined fragments and one of doubtful authenticity which reference Rufus’ understanding of melancholy. Preserved across diverse linguistic and cultural contexts, these fragments illuminate the transmission of ancient Graeco-Roman medical knowledge into the Islamic Golden Age and Renaissance Europe. Arabic texts are compared with corresponding Latin editions to verify their authenticity and trace their historical transmission.
The prenatal period, childhood, and adolescence are critical periods of development characterized by high plasticity. As an extension of the Developmental Origins of Health and Disease (DOHaD) paradigm, known as Origins of Paternal Health and Disease (POHaD), recent studies in rodents provide evidence that paternal obesity is associated not only with infertility but also with an increased risk of metabolic disorders in the offspring. In rodents, litter size reduction is used to induce lactational overfeeding by increasing the amount of breast milk to pups, which causes metabolic and reproductive disorders in adulthood. This work evaluated the metabolic and reproductive alterations in the offspring of males raised in normal or small litter (SL) in the prepubertal period and in adult life. The results show that paternal obesity due to early overfeeding affects the offspring in a sex-specific manner. During the prepubertal period, male offspring of SL fathers showed decreased Lee index, tibia length, and HDL plasma levels, and increased weight of gastrocnemius muscle, while female offspring of SL fathers only showed reduced HDL plasma levels. In adulthood, male offspring of overfed males showed glucose intolerance and reduced food intake and triglycerides plasma levels, signs of metabolic dysfunction. Female offspring of overfed males showed delayed puberty onset and higher prevalence of infertile periods in the estrous cycles, indicating a potential susceptibility to reproductive dysfunction. The results of the current study show that paternal obesity due to early overfeeding affects energy balance and reproduction of their offspring in a sex-specific manner.
Taiwanese politics is often characterized as being dominated by two camps: the “blue” camp, which supports the Chinese Nationalist Party (KMT), and the “green” camp, which supports the Democratic Progressive Party (DPP). However, a substantial portion of the electorate identifies as independent, representing one of the largest but least studied groups in Taiwan’s political landscape. This study examines how independent voters differed from partisan voters in their responses to one of the most defining political moments in recent years, the legislative reform, and the subsequent Bluebird movement, one of the largest social protests in Taiwan since 2014. Drawing on two waves of original survey data, we find that independents were more likely to adopt the KMT’s framing of the protests and related legislative reforms. However, independent voters had greater support than blue camp supporters for democratic practices, despite their alignment over the Bluebird movement. These findings advance understanding of Taiwan’s electoral blocs, the dynamics of movement–party relations and the contours of democratic support among its citizens.
This study examined the relationship between food safety, food access, and nutritional status among earthquake victims in Kahramanmaraş and Hatay, Türkiye.
Methods
This descriptive, cross-sectional study was conducted face-to-face with 209 earthquake victims in 2023.
Results
The median age was 42 years, and 52.6% were female. Among women, the perception of unhealthy food, inadequate mass feeding services, and dissatisfaction with meals increased the risk of food safety concerns. In men, those with an associate degree or higher were 20.7 times more likely to perceive food safety as inadequate, while the perception of unhealthy food raised this risk by 12.4 times. Lack of access to sufficient drinking water increased the risk of food inaccessibility by 2.6 times among women. In men, employment and dissatisfaction with meals increased this risk by 2.7 and 2.8 times, respectively. Both genders exhibited inadequate intake of water, energy, protein, polyunsaturated fats, fiber, folate, potassium, calcium, magnesium, iron, zinc, and several vitamins (P <0.05), while phosphorus and sodium levels were elevated (P <0.01).
Conclusions
Food safety and access issues were critical among earthquake victims, significantly impacting nutritional status. Findings emphasize the need for improved emergency food aid and distribution systems to mitigate post-disaster nutritional risks.
Maintenance procedures are critically important for preserving the structural integrity, maintaining the functionality and ensuring the operational safety of aircraft. Traditional inspection techniques used in aircraft are often costly, time-consuming and prone to human mistake. Today, the opportunities provided by digitalisation and automation in aircraft maintenance and inspection processes are paving the way for innovative approaches. In this context, the use of inspection systems supported by image processing technologies has the potential to bring about a significant transformation in aircraft maintenance. Visual inspection methods integrated with unmanned aerial vehicles (UAVs) enable the rapid, accurate and repeatable detection of defects such as corrosion and cracks on the external surfaces of aircraft. This study focuses on the automatic detection and classification of defects on the external surfaces of aircraft, based on tests and analyses carried out by artificial intelligence algorithms using high-resolution data. The model developed in this study was implemented in Python in the Google Colab environment and supported by AI algorithms trained on visual data. The main objective is to investigate the feasibility of UAV-based systems for aircraft visual inspection and to provide concrete evidence of their practical applicability. In this regard, the UAV platform selected for image acquisition is intended to comprehensively scan the target areas and capture images with sufficient resolution for processing by artificial intelligence algorithms. A review of the literature reveals that UAV- and AI-based integrated approaches have been explored in only a limited number of studies related to aircraft maintenance. In this context, the present study proposes a system that enables the rapid and accurate detection of structural defects such as corrosion and cracks on the external surfaces of aircraft.
We developed a two-phase lattice Boltzmann model by coupling the entropic multiple-relaxation-time (EMRT or KBC) collision operator enabling low fluid viscosity, with a source term (Wang et al. 2022, Phys. Rev. E vol. 105, no 4) to independently adjust surface tension. The coupling is implemented via the exact difference method (EDM), which allows full consideration of external-force effects on the entropic stabiliser in KBC, in contrast to the recent work of Wang et al. (2022 Phys. Rev. E vol. 105) and Xu et al. (2024 Comput. Math. Appl. vol. 159, 92–101). More importantly, we address a major drawback of the EDM by explicitly demonstrating how its high-order error terms influence the pressure tensor and surface tension. Using the developed model, we investigated droplet impact and splashing on a thin liquid film at a remarkably high Weber number of ${\textit{We}} = 5000$ and Reynolds number of ${\textit{Re}} = 5000$. Droplet impact and splashing on flat surfaces and mesh structures at very high ${\textit{Re}}$ (15 200) and ${\textit{We}}$ (1020) are also studied after validating four representative cases against experiments. For droplet impact on flat surfaces, hydrophobicity promotes the growth of peripheral instabilities, leading to fingering splashing. Corona splashing transitions to fingering splashing as the liquid–gas viscosity ratio increases. For droplet impact on mesh structures, large openings promote liquid penetration, whereas small openings enhance spreading. As the solid ratio increases, the maximum spreading ratio increases monotonically but nonlinearly, whereas the maximum penetrated liquid pillar length first rises and then drops. These simulations demonstrate the proposed model offers significant advantages for accurately capturing and elucidating complex droplet impact and splashing dynamics at high ${\textit{Re}}$ and ${\textit{We}}$.
This study introduces a mission-centric design optimisation framework for unmanned aerial vehicles (UAVs) to enhance mission performance across diverse operational scenarios. The proposed framework integrates multidisciplinary design optimisation with a wargaming-based simulation environment and leverages deep neural network-based surrogate models to balance key performance metrics, such as aerodynamic efficiency, radar cross section, structural weight and payload capacity. By incorporating automated task assignment, path planning and a probabilistic combat model, the framework evaluates UAV configurations in multi-domain, multi-asset scenarios. The algorithm identifies optimal solutions that maximise mission success while managing trade-offs among survivability, lethality and cost. Simulation results illustrate the framework’s functionality through representative mission scenarios, highlighting how design variables can influence operational effectiveness relative to baseline configurations. Furthermore, the modular design approach enables rapid UAV reconfiguration for evolving mission needs, offering scalable and adaptable solutions. These findings highlight the importance of integrating mission simulation tools with advanced optimisation techniques to address challenges in dynamic, high-threat environments, providing a robust methodology for UAV and fleet design.
On the Dual View, absolute and comparative welfare provide moral reasons to make individuals well off and better off. Given that dual reason-giving force, what reason does welfare provide overall? I explore two approaches. The Collective Approach first aggregates the absolute and comparative reasons separately before combining them at the collective level. However, it implies that, if an individual gains or loses enough welfare, we have reasons to create an unhappy rather than another happy individual. The Individual Approach combines the absolute and comparative reasons for each individual before aggregating across all individuals. It avoids the objection if comparative reasons mitigate but don’t outweigh absolute reasons. That, however, implies hypersensitivity and contradicts the prioritarian idea. We could also restrict comparative reasons, but only on pain of effectively abandoning the Dual View. Or we accept one half of the objection and adopt an asymmetry for comparative welfare to avoid the other half.