Proceedings of the Royal Society A: Mathematical, Physical and Engineering Sciences最新文献

In silico modelling of mechanical response of breast cancer cell to interstitial fluid flow 乳腺癌细胞对间质流体流动的机械反应的硅学建模

IF 3.5 3区综合性期刊

Proceedings of the Royal Society A: Mathematical, Physical and Engineering Sciences Pub Date : 2024-06-05 DOI: 10.1098/rspa.2024.0046

Vaibhav Kalra, Sweta Prabhakar, Anubhav Rawat, Abhishek Kumar Tiwari, Dharmendra Tripathi

{"title":"In silico modelling of mechanical response of breast cancer cell to interstitial fluid flow","authors":"Vaibhav Kalra, Sweta Prabhakar, Anubhav Rawat, Abhishek Kumar Tiwari, Dharmendra Tripathi","doi":"10.1098/rspa.2024.0046","DOIUrl":"https://doi.org/10.1098/rspa.2024.0046","url":null,"abstract":"A cell’s mechanical environment regulates biological activities. Several studies have investigated the response of healthy epithelial mammary (MCF10A) and breast cancer (MCF7) cells to vascular and interstitial fluid motion-induced hydrodynamic forces. The mechanical stiffness of healthy and breast cancer cells differ significantly, which can influence the transduction of forces regulating the cell’s invasive behaviour. This aspect has not been well explored in the literature. The present work investigates the mechanical response of MCF10A and MCF7 cells to tissue-level interstitial fluid flow. A two-dimensional fluid flow–cell interaction model is developed based on the actual shapes of the cells, acquired from experimental fluorescent images. The material properties of the cell compartments (cytoplasm and nucleus) were assigned in the model based on the literature. The outcomes indicate that healthy MCF10A cells experience higher von Mises and shear stresses than the MCF7 cells. In addition, the MCF7 cell experiences higher strain and displacements than its healthy counterpart. Thus, the different mechano-responsiveness of MCF10A and MCF7 cells could be responsible for regulating the invasive potential of the cells. This work enhances our understanding of mechanotransduction activities involved in cancer malignancy which can further help in cancer diagnosis based on cell mechanotype.","PeriodicalId":20716,"journal":{"name":"Proceedings of the Royal Society A: Mathematical, Physical and Engineering Sciences","volume":"24 1","pages":""},"PeriodicalIF":3.5,"publicationDate":"2024-06-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141258425","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"综合性期刊","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Quasi-static responses of marine mussel plaques detached from deformable wet substrates under directional tensions 海洋贻贝斑块在定向张力作用下脱离可变形湿基质的准静态响应

IF 3.5 3区综合性期刊

Proceedings of the Royal Society A: Mathematical, Physical and Engineering Sciences Pub Date : 2024-05-29 DOI: 10.1098/rspa.2023.0465

Yong Pang, Wei Sun, Tao Liu

{"title":"Quasi-static responses of marine mussel plaques detached from deformable wet substrates under directional tensions","authors":"Yong Pang, Wei Sun, Tao Liu","doi":"10.1098/rspa.2023.0465","DOIUrl":"https://doi.org/10.1098/rspa.2023.0465","url":null,"abstract":"Quantifying the response of marine mussel plaque attachment to wet surfaces remains a significant challenge to a mechanistic understanding of plaque adhesion. Here, we develop a novel, customized microscope system, combined with two-dimensional in situ digital image correlation (DIC), to quantify the in-plane deformation of a deformable substrate that interacts with a mussel plaque under directional tension. By examining the strain field within the substrate, we acquired an understanding of the mechanism by which in-plane traction forces are transmitted from the mussel plaque to the underlying substrate. Finite-element (FE) models were developed to assist in the interpretation of the experimental measurement. Our study revealed a synergistic effect of pulling angle and substrate stiffness on plaque detachment, with mussel plaques anchoring to a ‘stiff’ substrate at small pulling angles, i.e. natural anchoring angles, having mechanical advantages with higher load-bearing capacity and less plaque deformation. We identify two distinct failure modes, i.e. shear-traction-governed failure (STGF) and normal-traction-governed failure (NTGF). It was found that increasing the stiffness of the substrate or reducing the pulling angle results in a change of the failure mode from NTGF to STGF. Our findings offer new insights into the mechanistic understanding of mussel plaque–substrate interaction, providing a plaque-inspired strategy to develop high-performance and artificial wet adhesion.","PeriodicalId":20716,"journal":{"name":"Proceedings of the Royal Society A: Mathematical, Physical and Engineering Sciences","volume":"8 1","pages":""},"PeriodicalIF":3.5,"publicationDate":"2024-05-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141258330","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"综合性期刊","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

A mathematical model of the Bray–Liebhafsky reaction 布雷-李布哈佛斯基反应的数学模型

IF 3.5 3区综合性期刊

Proceedings of the Royal Society A: Mathematical, Physical and Engineering Sciences Pub Date : 2024-05-29 DOI: 10.1098/rspa.2023.0964

Heath Dimsey, Lawrence K. Forbes, Andrew P. Bassom, Courtney Quinn

{"title":"A mathematical model of the Bray–Liebhafsky reaction","authors":"Heath Dimsey, Lawrence K. Forbes, Andrew P. Bassom, Courtney Quinn","doi":"10.1098/rspa.2023.0964","DOIUrl":"https://doi.org/10.1098/rspa.2023.0964","url":null,"abstract":"It is known that the widely studied Bray–Liebhafsky reaction typically exhibits complex chemical behaviour. Numerous mathematical systems have been proposed to describe the iodine oscillations that occur during this process. Recently, a four-variable model of the Bray–Liebhafsky reaction has been proposed and analytical and numerical investigations suggested that chaotic solutions may exist. We revisit this four-variable model here and perform what appears to be the first detailed work on this system. We suggest that this model is perhaps not chaotic after all. Informed by these fresh insights, we propose a reduced two-variable model based upon the four-variable system. This model is created with the twin goals of enabling simpler mathematical analysis while retaining the underlying chemical mechanisms. We are able to demonstrate that our reduced problem performs very well when compared with the full model for realistic parameter values. In particular, key regions of parameter space are identified within which temporal oscillations can occur. Moreover, these persistent oscillations are consistent with the available qualitative experimental observations.","PeriodicalId":20716,"journal":{"name":"Proceedings of the Royal Society A: Mathematical, Physical and Engineering Sciences","volume":"1 1","pages":""},"PeriodicalIF":3.5,"publicationDate":"2024-05-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141258552","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"综合性期刊","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

A tensor density measure of topological charge in three-dimensional nematic phases 三维向列相中拓扑电荷的张量密度测量方法

IF 3.5 3区综合性期刊

Proceedings of the Royal Society A: Mathematical, Physical and Engineering Sciences Pub Date : 2024-05-22 DOI: 10.1098/rspa.2023.0564

Cody D. Schimming, Jorge Vinals

{"title":"A tensor density measure of topological charge in three-dimensional nematic phases","authors":"Cody D. Schimming, Jorge Vinals","doi":"10.1098/rspa.2023.0564","DOIUrl":"https://doi.org/10.1098/rspa.2023.0564","url":null,"abstract":"A path-independent measure in order parameter space is introduced such that, when integrated along any closed contour in a three-dimensional nematic phase, it yields the topological charge of any line defects encircled by the contour. A related measure, when integrated over either closed or open surfaces, reduces to known results for the charge associated with point defects (hedgehogs) or Skyrmions. We further define a tensor density, the disclination density tensor <math display=\"inline\">\u0000<mstyle displaystyle=\"true\" scriptlevel=\"0\">\u0000<mrow>\u0000<mrow>\u0000<mi mathvariant=\"bold\">D</mi>\u0000</mrow>\u0000</mrow>\u0000</mstyle>\u0000</math>, from which the location of a disclination line can be determined. This tensor density has a dyadic decomposition near the line into its tangent and its rotation vector, allowing a convenient determination of both. The tensor <math display=\"inline\">\u0000<mstyle displaystyle=\"true\" scriptlevel=\"0\">\u0000<mrow>\u0000<mrow>\u0000<mi mathvariant=\"bold\">D</mi>\u0000</mrow>\u0000</mrow>\u0000</mstyle>\u0000</math> may be non-zero in special configurations in which there are no defects (double-splay or double-twist configurations), and its behaviour there is provided. The special cases of Skyrmions and hedgehog defects are also examined, including the computation of their topological charge from <math display=\"inline\">\u0000<mstyle displaystyle=\"true\" scriptlevel=\"0\">\u0000<mrow>\u0000<mrow>\u0000<mi mathvariant=\"bold\">D</mi>\u0000</mrow>\u0000</mrow>\u0000</mstyle>\u0000</math>.","PeriodicalId":20716,"journal":{"name":"Proceedings of the Royal Society A: Mathematical, Physical and Engineering Sciences","volume":"30 1","pages":""},"PeriodicalIF":3.5,"publicationDate":"2024-05-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141258326","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"综合性期刊","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Isospectral open cavities and gratings 等谱开腔和光栅

IF 3.5 3区综合性期刊

Proceedings of the Royal Society A: Mathematical, Physical and Engineering Sciences Pub Date : 2024-05-15 DOI: 10.1098/rspa.2023.0853

Sebastiano Cominelli, Benjamin Vial, Sébastien Guenneau, Richard V. Craster

{"title":"Isospectral open cavities and gratings","authors":"Sebastiano Cominelli, Benjamin Vial, Sébastien Guenneau, Richard V. Craster","doi":"10.1098/rspa.2023.0853","DOIUrl":"https://doi.org/10.1098/rspa.2023.0853","url":null,"abstract":"Open cavities are often an essential component in the design of ultra-thin subwavelength metasurfaces and a typical requirement is that cavities have precise, often low frequency, resonances while simultaneously being physically compact. To aid this design challenge, we develop a methodology to allow isospectral twinning of reference cavities with either smaller or larger ones, enforcing their spectra to coincide so that open resonators are identical in terms of their complex eigenfrequencies. For open systems, the spectrum is not purely discrete and real, and we pay special attention to the accurate twinning of leaky modes associated with complex-valued eigenfrequencies with an imaginary part orders of magnitude lower than the real part. We further consider twinning of two-dimensional gratings, and model these with Floquet–Bloch conditions along one direction and perfectly matched layers in the other one; complex eigenfrequencies of special interest are located in the vicinity of the positive real line and further depend upon the Bloch wavenumber. The isospectral behaviour is illustrated, and quantified, throughout by numerical simulation using finite-element analysis.","PeriodicalId":20716,"journal":{"name":"Proceedings of the Royal Society A: Mathematical, Physical and Engineering Sciences","volume":"26 1","pages":""},"PeriodicalIF":3.5,"publicationDate":"2024-05-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141258328","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"综合性期刊","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Newtonian gravitational waves from a continuum 来自连续体的牛顿引力波

IF 3.5 3区综合性期刊

Proceedings of the Royal Society A: Mathematical, Physical and Engineering Sciences Pub Date : 2024-05-15 DOI: 10.1098/rspa.2023.0656

Peter Vadasz

{"title":"Newtonian gravitational waves from a continuum","authors":"Peter Vadasz","doi":"10.1098/rspa.2023.0656","DOIUrl":"https://doi.org/10.1098/rspa.2023.0656","url":null,"abstract":"Gravitational waves are being shown to derive directly from Newtonian dynamics for a continuous mass distribution, e.g. compressible fluids or equivalent. It is shown that the equations governing a continuous mass distribution, i.e. the inviscid Navier–Stokes equations for a general variable gravitational field <math display=\"inline\">\u0000<mstyle displaystyle=\"true\" scriptlevel=\"0\">\u0000<mrow>\u0000<mrow>\u0000<mi mathvariant=\"bold-italic\">g</mi>\u0000</mrow>\u0000<mrow>\u0000<mo>(</mo>\u0000<mrow>\u0000<mi>t</mi>\u0000<mo>,</mo>\u0000<mrow>\u0000<mi mathvariant=\"bold-italic\">x</mi>\u0000</mrow>\u0000</mrow>\u0000<mo>)</mo>\u0000</mrow>\u0000</mrow>\u0000</mstyle>\u0000</math>, are equivalent to a form identical to the Maxwell equations from electromagnetism, subject to a specified condition. The consequence of this equivalence is the creation of gravity waves that propagate at a finite speed. The latter implies that Newtonian gravitation as presented in this paper is not ‘spooky action at a distance’ but rather is similar to electromagnetic waves propagating at finite speed, despite the apparent form appearing in the integrated field formula. In addition, this proves that, in analogy to the Maxwell equations, the Newtonian gravitation equations are Lorentz invariant for waves propagating at the speed of light. Since gravitational waves were so far derived only from Einstein’s general relativity theory, it becomes appealing to check if there is a connection between the Newtonian waves presented in this paper and the general relativity type of waves at least in a certain limit of overlapping validity, i.e. as a flat-space approximation. The latter is left for follow-up research.","PeriodicalId":20716,"journal":{"name":"Proceedings of the Royal Society A: Mathematical, Physical and Engineering Sciences","volume":"41 1","pages":""},"PeriodicalIF":3.5,"publicationDate":"2024-05-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141258413","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"综合性期刊","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Discrete-to-continuum models of pre-stressed cytoskeletal filament networks 预应力细胞骨架丝网的离散到连续模型

IF 3.5 3区综合性期刊

Proceedings of the Royal Society A: Mathematical, Physical and Engineering Sciences Pub Date : 2024-05-15 DOI: 10.1098/rspa.2023.0611

J. Köry, N. A. Hill, X. Y. Luo, P. S. Stewart

{"title":"Discrete-to-continuum models of pre-stressed cytoskeletal filament networks","authors":"J. Köry, N. A. Hill, X. Y. Luo, P. S. Stewart","doi":"10.1098/rspa.2023.0611","DOIUrl":"https://doi.org/10.1098/rspa.2023.0611","url":null,"abstract":"We introduce a mathematical model for the mechanical behaviour of the eukaryotic cell cytoskeleton. This discrete model involves a regular array of pre-stressed protein filaments that exhibit resistance to enthalpic stretching, joined at cross-links to form a network. Assuming that the inter-cross-link distance is much shorter than the length scale of the cell, we upscale the discrete force balance to form a continuum system of governing equations and deduce the corresponding macroscopic stress tensor. We use these discrete and continuum models to analyse the imposed displacement of a bead placed in the domain, characterizing the cell rheology through the force–displacement curve. We further derive an analytical approximation to the stress and strain fields in the limit of small bead radius, predicting the net force required to generate a given deformation and elucidating the dependency on the microscale properties of the filaments. We apply these models to networks of the intermediate filament vimentin and demonstrate good agreement between predictions of the discrete, continuum and analytical approaches. In particular, our model predicts that the network stiffness increases sublinearly with the filament pre-stress and scales logarithmically with the bead size.","PeriodicalId":20716,"journal":{"name":"Proceedings of the Royal Society A: Mathematical, Physical and Engineering Sciences","volume":"8 1","pages":""},"PeriodicalIF":3.5,"publicationDate":"2024-05-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141258421","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"综合性期刊","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

High-order homogenization of the time-modulated wave equation: non-reciprocity for a single varying parameter 时间调制波方程的高阶同质化：单一变化参数的非互易性

IF 3.5 3区综合性期刊

Proceedings of the Royal Society A: Mathematical, Physical and Engineering Sciences Pub Date : 2024-05-08 DOI: 10.1098/rspa.2023.0776

Marie Touboul, Bruno Lombard, Raphael C. Assier, Sebastien Guenneau, Richard V. Craster

引用次数: 0

Scattering from time-modulated subwavelength resonators 来自时间调制亚波长谐振器的散射

IF 3.5 3区综合性期刊

Proceedings of the Royal Society A: Mathematical, Physical and Engineering Sciences Pub Date : 2024-05-01 DOI: 10.1098/rspa.2024.0177

Habib Ammari, Jinghao Cao, Erik Orvehed Hiltunen, Liora Rueff

引用次数: 0

On integral theorems and their statistical properties 关于积分定理及其统计特性

IF 3.5 3区综合性期刊

Proceedings of the Royal Society A: Mathematical, Physical and Engineering Sciences Pub Date : 2024-04-24 DOI: 10.1098/rspa.2023.0703

Nhat Ho, Stephen G. Walker

引用次数: 0