Michal Kuchař, Alexander Morávek, Niels Hammer, Petr Henyš
{"title":"From pelvic geometry to modal compliance: sex-specific deformation pathways in the human pelvic ring.","authors":"Michal Kuchař, Alexander Morávek, Niels Hammer, Petr Henyš","doi":"10.1098/rsif.2026.0555","DOIUrl":"10.1098/rsif.2026.0555","url":null,"abstract":"<p><p>Walking, posture and childbirth all depend on the pelvic ring, yet human pelvic dimorphism is usually interpreted from static birth-canal dimensions. We asked whether sex differences in pelvic function are explained by overall size and static pelvimetry or by available mechanical deformation pathways. We analysed 278 anatomically standardized lumbopelvic finite-element models built from clinical computed tomography scans. In each model, modal decomposition separated pelvic deformation into a shared, ranked set of pathways, allowing us to compare pathway stiffness, load recruitment and sensitivity to ligamentous and cartilaginous constraints. Overall pelvic size accounted for much of the baseline stiffness spectrum, confirming a strong size-dependent component. However, size- and age-adjusted sex differences remained: male pelves showed approximately 20% higher eigenvalues than female pelves in modes 2 and 9. Loading probes showed a common backbone in both sexes during habitual support, whereas inlet opening revealed a different response organization, with female pelves distributing deformation across a broader, coordinated set and a higher effective number of participating modes. The principal inlet-opening pathway was most sensitive to the pubic symphysis and anterior sacroiliac ligamentous constraints. Pelvic dimorphism, therefore, lies not only in canal shape, but in the organization of mechanical pathways that balance support with deformation.</p>","PeriodicalId":17488,"journal":{"name":"Journal of The Royal Society Interface","volume":"23 243","pages":""},"PeriodicalIF":3.4,"publicationDate":"2026-10-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC13641948/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149111468","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"综合性期刊","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Jindong Zhang, Simon Baeckens, Raoul Van Damme, Kirsten Wommer, Kristina Wanieck
{"title":"Who mimics nature? Disciplinary asymmetry in biomimetic and bioinspired research teams.","authors":"Jindong Zhang, Simon Baeckens, Raoul Van Damme, Kirsten Wommer, Kristina Wanieck","doi":"10.1098/rsif.2026.0324","DOIUrl":"10.1098/rsif.2026.0324","url":null,"abstract":"<p><p>Biomimetics is generally viewed as inherently interdisciplinary, yet the disciplinary composition of biomimetic research teams has not been systematically quantified. We analysed 74 407 biomimetics-related publications from the past two decades and classified 436 010 author-paper affiliation records by biological or technical expertise to reconstruct team composition. Our analysis reveals an asymmetric disciplinary landscape: technical authors outnumber biological researchers by roughly two to one. Team organization is more balanced-while purely technical teams still represent the largest share of publications, interdisciplinary Bio-Tech teams have expanded over 20-fold since 2004 and now nearly match purely technical teams in annual output. Pathways to interdisciplinarity vary geographically: countries achieve Bio-Tech collaboration through distinct organizational models, from domestic multi-institutional networks to international partnerships. Interdisciplinary teams also achieve higher citation performance than teams composed exclusively of biological or technical researchers. Team composition is further associated with biological models used for inspiration: purely biological teams draw on a broader range of taxa, whereas studies involving technical researchers rely more often on a narrower set of conventional organisms and typically report their biological models with lower taxonomic specificity. These findings map the team architecture of biomimetics and support more targeted approaches to interdisciplinary collaboration.</p>","PeriodicalId":17488,"journal":{"name":"Journal of The Royal Society Interface","volume":"23 243","pages":""},"PeriodicalIF":3.4,"publicationDate":"2026-10-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC13641953/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149111466","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"综合性期刊","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Alannah Neff, Alexandra Vallet, Mariia Dvoriashyna
{"title":"How brain pulsations drive solute transport in the cranial subarachnoid space: insights from a toy model.","authors":"Alannah Neff, Alexandra Vallet, Mariia Dvoriashyna","doi":"10.1098/rsif.2026.0196","DOIUrl":"10.1098/rsif.2026.0196","url":null,"abstract":"<p><p>Cerebrospinal fluid (CSF) circulates around and through the brain, supporting neural homeostasis by regulating the extracellular chemical environment. Yet, the physical mechanisms governing CSF-driven solute transport remain poorly understood, limiting the design of diagnostic and therapeutic strategies targeting brain clearance and drug delivery. Pulsatile CSF flow in the cranial subarachnoid space (cSAS) is driven by cardiac, respiratory and sleep-related vasomotion. Over longer timescales, weaker steady flows, such as inertial steady streaming, Stokes drift and production-drainage flow, may contribute to solute transport, but their role and relative importance remain unclear. Here, we develop a simplified two-dimensional model of CSF flow and solute transport in the cSAS using lubrication theory. Through multiple-timescale and asymptotic analyses, we derive a reduced long-time transport equation in which advection is governed by the Lagrangian mean velocity, incorporating steady streaming, production-drainage flow and Stokes drift. Analysing three physiologically relevant case studies, we show that steady flows can substantially reshape concentration profiles, enhance dispersion and alter clearance efficiency. Our results clarify the mechanisms underlying CSF-mediated transport, predict distinct regimes in humans and mice and highlight the importance of subject-specific physiological parameters when interpreting contrast-agent and intrathecal drug-delivery studies.</p>","PeriodicalId":17488,"journal":{"name":"Journal of The Royal Society Interface","volume":"23 243","pages":""},"PeriodicalIF":3.4,"publicationDate":"2026-10-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC13641946/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149111484","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"综合性期刊","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Evolution expresses the second law of thermodynamics in action.","authors":"Arto Annila, Keith Baverstock","doi":"10.1098/rsif.2026.0430","DOIUrl":"10.1098/rsif.2026.0430","url":null,"abstract":"<p><p>Evolution through natural selection has long been considered unique to biological systems, yet similar patterns emerge from physical, chemical, technological, economic and social processes. Skewed distributions, often near-lognormal, and sigmoidal courses, often with a power-law central region, recur across scales and scopes, making no distinction between living and non-living. This ubiquity suggests that evolution, in all its manifestations, expresses a universal principle. The second law of thermodynamics, derived from the statistical physics of open systems, explains the recurrent patterns: flows of energy naturally select the means and mechanisms that bring about balance in the least time. As a sequence of changes, evolution is destined for the free-energy minimum, equivalent to the entropy maximum; yet its paths remain profoundly unpredictable, even chaotic, as the process alters its own course by consuming its driving forces. By integrating all these interdependencies under the atomistic axiom, the equation of evolution becomes a holistic formulation. Unlike additive genetic models, thermodynamics naturally accounts for multiplicative dynamics and allometric scaling observed in proliferation, adaptation, speciation, cooperation, competition and self-organization, as well as in disintegration, degeneration and extinction. In this way, thermodynamics finally provides the long-sought unified theory from microscopic constituents to macroscopic phenomena.</p>","PeriodicalId":17488,"journal":{"name":"Journal of The Royal Society Interface","volume":"23 243","pages":""},"PeriodicalIF":3.4,"publicationDate":"2026-10-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC13641944/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149111475","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"综合性期刊","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Jérémie Vilpellet, Alexandre Darmon, Michael Benzaquen
{"title":"From random walks to thermal rides: universal anomalous transport in soaring flights.","authors":"Jérémie Vilpellet, Alexandre Darmon, Michael Benzaquen","doi":"10.1098/rsif.2026.0227","DOIUrl":"10.1098/rsif.2026.0227","url":null,"abstract":"<p><p>Cross-country soaring flights rely on intermittent atmospheric updrafts to cover long distances, producing trajectories that alternate between rapid relocation and local exploration. From a large dataset of paraglider, hang glider and sailplane flights, we uncover a universal transport law: beyond short ballistic times, horizontal motion is persistently sub-ballistic, with a Hurst exponent ≈0.88 largely independent of aircraft type. Phase-resolved analysis using a probabilistic segmentation method shows that this scaling arises from the fundamentally intermittent, two-dimensional and directionally correlated nature of soaring transport, in which successive ballistic segments do not add coherently. We find that pilot skill, reflected in more efficient exploration and decision-making, manifests primarily in the search phase, enhancing the ability to efficiently probe the air mass and locate the next thermal. Overall, our results suggest that atmospheric structure and the generic organization of the transition-search-climb cycle dominate transport properties, placing human soaring alongside biological and physical systems where anomalous transport emerges from intermittency and persistence.</p>","PeriodicalId":17488,"journal":{"name":"Journal of The Royal Society Interface","volume":"23 243","pages":""},"PeriodicalIF":3.4,"publicationDate":"2026-10-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC13641945/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149111494","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"综合性期刊","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Varun K Rao, Ryan Higgs, Hautahi Kingi, Filippo Radicchi, Santo Fortunato, Maria Litvinova
{"title":"Modelling plant disease spread via high-resolution human mobility networks.","authors":"Varun K Rao, Ryan Higgs, Hautahi Kingi, Filippo Radicchi, Santo Fortunato, Maria Litvinova","doi":"10.1098/rsif.2026.0213","DOIUrl":"10.1098/rsif.2026.0213","url":null,"abstract":"<p><p>Human mobility plays a crucial role in the spread of human diseases but is rarely quantified in plant disease epidemics. To address this gap, we integrate a unique, high-resolution network of human movements in New Zealand with a metapopulation model to mechanistically simulate pathogen transmission. We calibrate the model on the nationwide 2010 kiwifruit vine disease (Psa-V) outbreak and show that it reproduces the observed spatio-temporal spread, confirming that the human mobility network is a strong foundation for modelling human-mediated transmission dynamics. By analysing spatial infection trends, we find that most dispersal occurs locally, as often illustrated in the plant-outbreak literature. However, sporadic long-range connections are necessary to model a nationwide outbreak. Using the model as an in silico laboratory, we demonstrate that the severity of human-mediated pathogen transmission is highly sensitive to the timing and location of initial importation. We observe a potential causal link between seasonal labour patterns and epidemic risk in high-traffic seasons. This study showcases a novel data-driven framework for modelling the spatio-temporal spread of agricultural pathogens when human-mediated dispersal is epidemiologically relevant, underscoring the importance of leveraging human mobility networks for building better biosecurity systems.</p>","PeriodicalId":17488,"journal":{"name":"Journal of The Royal Society Interface","volume":"23 243","pages":""},"PeriodicalIF":3.4,"publicationDate":"2026-10-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC13641950/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149111499","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"综合性期刊","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Alexander Triccas, Mariana Verezhak, Johannes Ihli, Manuel Guizar-Sicairos, Mirko Holler, Fraser Laidlaw, Martin R Singleton, Virginie Chamard, Rachel Wood, Tilman A Grünewald, Fabio Nudelman
{"title":"Deciphering coccolith formation: advanced microscopy insights from the biomineralization of Gephyrocapsa huxleyi.","authors":"Alexander Triccas, Mariana Verezhak, Johannes Ihli, Manuel Guizar-Sicairos, Mirko Holler, Fraser Laidlaw, Martin R Singleton, Virginie Chamard, Rachel Wood, Tilman A Grünewald, Fabio Nudelman","doi":"10.1098/rsif.2026.0369","DOIUrl":"10.1098/rsif.2026.0369","url":null,"abstract":"<p><p>Coccolithophores are unicellular marine phytoplankton that produce complex and intricately shaped mineralized scales called coccoliths. Coccoliths are produced in an intracellular vesicle where crystal nucleation occurs, from which several individual calcite units develop with anisotropic crystallographic facets, prompting studies into the cellular mechanisms that control crystal growth within the cell. Here, we characterize those morphological developments in three dimensions that occur during the formation of coccoliths by the species Gephyrocapsa huxleyi using cryo-ptychographic X-ray computed tomography. This technique is ideally suited to study coccolith mineral development, as intracellular structures can be imaged intact in their native state without needing to disrupt cells. Combined with additional imaging of developing coccoliths using cryo-transmission electron microscopy and scanning electron microscopy, we report a quasi-continuous sequence of coccolith growth with the respective calculated mass for each state. Within this growth sequence, we identified that a significant proportion of the coccoliths were at the proto-coccolith ring stage, consistent with a rate-limiting step in their formation that we correlated to the shift in growth of the crystals from isotropic to anisotropic, potentially owing to constraints imposed by adjacent crystal units. This study provides unique insights into the morphological evolution of coccoliths during their development, and strengthens our understanding of this important biomineralization process.</p>","PeriodicalId":17488,"journal":{"name":"Journal of The Royal Society Interface","volume":"23 243","pages":""},"PeriodicalIF":3.4,"publicationDate":"2026-10-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC13641947/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149111396","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"综合性期刊","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Ludovic Jami, Bertrand Siboulet, Thomas Zemb, Jérôme Casas, Jean-François Dufrêche
{"title":"Collective adsorption of pheromones at the water-air interface.","authors":"Ludovic Jami, Bertrand Siboulet, Thomas Zemb, Jérôme Casas, Jean-François Dufrêche","doi":"10.1098/rsif.2025.1229","DOIUrl":"10.1098/rsif.2025.1229","url":null,"abstract":"<p><p>Understanding the phase behaviour of pheromones and other messaging molecules remains a significant and largely unexplored challenge, even though it plays a central role in chemical communication. Here, we present all-atom molecular dynamics simulations to investigate the behaviour of bombykol, a model insect pheromone, adsorbed at the water-air interface. This system serves as a proxy for studying the amphiphilic nature of pheromones and their interactions with aerosol particles in the atmosphere. Our simulations reveal the molecular organization of the bombykol monolayer and its adsorption isotherm. A new soft-sticky particle equation of state accurately describes the monolayer's behaviour. The analysis uncovers a two-dimensional liquid-gas phase transition within the monolayer. Collective adsorption stabilizes the molecules at the interface and the calculated free energy gain is approximately 2kBT. This value increases under lower estimates of the dew surface concentration, thereby enhancing pheromone adsorption onto aerosols. Overall, our findings hold broad relevance for molecular interface science, atmospheric chemistry and organismal chemical communication, particularly in highlighting the critical role of phase transition phenomena.</p>","PeriodicalId":17488,"journal":{"name":"Journal of The Royal Society Interface","volume":"23 243","pages":""},"PeriodicalIF":3.4,"publicationDate":"2026-10-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC13641943/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149111323","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"综合性期刊","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Maura Seynaeve, Anna C Render, Peter C Fino, Toon de Beukelaar
{"title":"Effects of one night of sleep deprivation on single- and dual-task gait.","authors":"Maura Seynaeve, Anna C Render, Peter C Fino, Toon de Beukelaar","doi":"10.1098/rsif.2026.0047","DOIUrl":"10.1098/rsif.2026.0047","url":null,"abstract":"<p><p>Sleep deprivation (SDEP) impairs cognitive control, which may affect movements that rely on these processes, such as walking. To test whether gait changes after one night of SDEP reflect reduced cognitive capacity, we compared its effects with those of dual-task walking (i.e. walking while performing a simultaneous cognitive task). We hypothesize that SDEP will produce gait changes similar to those under dual-task conditions. Eighteen healthy adults (nine female, nine male; age, mean (s.d.): 22.2 (2.3) years) were tested the morning after a SDEP and a control night. Participants completed two 2-minute trials: single-task walking and walking with a concurrent 2-back working memory task (DT, dual-task walking). Using lateral foot and pelvis marker trajectories, we calculated spatio-temporal parameters, foot placement error in anteroposterior (FPEAP) and mediolateral (FPEML) directions, and mediolateral margin of stability (MoSML). SDEP increased average step time (p < 0.001) and step length (p = 0.002), and DT reduced spatio-temporal variability. Both SDEP (p = 0.004) and DT (p < 0.001) reduced FPEAP, but only DT reduced FPEML (p < 0.001). Additionally, mean MoSML decreased only in SDEP (p = 0.025). Overall, these findings suggest that while SDEP and dual-tasking both affect gait, the effects of SDEP on gait cannot be fully explained by reduced cognitive resources.</p>","PeriodicalId":17488,"journal":{"name":"Journal of The Royal Society Interface","volume":"23 243","pages":""},"PeriodicalIF":3.4,"publicationDate":"2026-10-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC13641949/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149111483","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"综合性期刊","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Abby Bertics, Elizabeth R Chrastil, Nina Miolane, Jean M Carlson
{"title":"Flow Tree: a model for navigator dynamics and environmental complexity.","authors":"Abby Bertics, Elizabeth R Chrastil, Nina Miolane, Jean M Carlson","doi":"10.1098/rsif.2025.0944","DOIUrl":"https://doi.org/10.1098/rsif.2025.0944","url":null,"abstract":"<p><p>Navigation is a dynamic process, involving learning new environments and manoeuvring through them. Individuals differ widely in their abilities and strategies. Prior research often uses static measures, such as total distance travelled or location tallies, which overlook the variability and asymmetry in how trajectories unfold. To address this, we introduce the Flow Tree, a novel data structure that encodes how trajectories evolve relative to each other through time and space. Branching points capture when groups split into subgroups, producing a compressed, dynamic trace of group decision-making. We apply Flow Trees to data from 97 participants navigating a virtual reality maze. We define methods to construct and quantify Flow Trees. We show that (i) Flow Tree features are more strongly correlated with path accuracy than static metrics, and (ii) Flow Trees enable data-driven prediction of individual trajectory success. Further, we (iii) introduce a statistical framework to compare groups of Flow Trees, revealing how individual differences, path types and environments affect navigation. For example, successful male and female navigators resulted in significantly different Flow Trees, indicating differences beyond accuracy. By capturing temporal structure and variability, Flow Trees provide a dynamic, interpretable framework to quantify navigation behaviour and analyse group decision-making dynamics.</p>","PeriodicalId":17488,"journal":{"name":"Journal of The Royal Society Interface","volume":"23 242","pages":""},"PeriodicalIF":3.4,"publicationDate":"2026-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149081195","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"综合性期刊","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}