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Understanding the Recovery of the Intervertebral Disc:A Comprehensive Review of In Vivo and In Vitro Studies

Journal of Bionic Engineering 2024年第4期21卷 1919-1948页

作者： Faten Feki Fahmi Zaïri Abderrahman Tamoud Melissa Moulart Rym Taktak Nader Haddar Fahed Zaïri Sfax University ENISMaterials Engineering and Environment Laboratory3038SfaxTunisia University of Lille IMT Nord EuropeJUNIAUniversity of ArtoisULR 4515-LGCgELaboratoire de Génie Civil et geo-Environnement59000LilleFrance PrediTwins Lab 59000LilleFrance Japet Medical Device 59000LilleFrance Sfax University ENISLaboratory of Advanced Materials3038SfaxTunisia Ramsay Générale de Santé Hôpital PrivéLe Bois59000LilleFrance

Within the consistent daily rhythm of human life,intervertebral discs endure a variety of complex loads beyond the influences of gravity and muscle forces,leading to significant morphological changes(in terms of volume,area,and height)as well as biomechanical alterations,including an increase in disc stiffness and a decrease in intradiscal ***,the discs demonstrate an ability to regain their original morphological and biomechanical characteristics after a period of nocturnal *** preservation of normal disc function is critically dependent on this recovery phase,which serves to forestall premature disc *** phenomenon of disc recovery has been extensively documented through numerous in vivo studies employing advanced clinical techniques such as Magnetic Resonance Imaging(MRI),stadiometry,and intradiscal pressure ***,the findings from in vitro studies present a more complex picture,with reports varying between full recovery and only partial recuperation of the disc ***,research focusing on degenerated discs in vitro has shed light on the quantifiable impact of degeneration on the disc ability to *** dynamics within the disc are considered a primary factor in recovery,yet the disc intricate multiscale structure and its viscoelastic properties also play key *** elements interact in complex ways to influence the recovery mechanism,particularly in relation to the overall health of the *** objective of this review is to collate,analyze,and critically evaluate the existing body of in vivo and in vitro research on this topic,providing a comprehensive understanding of disc recovery *** understanding offers a blueprint for future advancements in medical treatments and bionic engineering solutions designed to mimic,support,and enhance the natural recovery processes of intervertebral discs.

关键词： Intervertebral disc Recovery In vivo vs.in vitro studies Degeneration Viscoelastic effects Fluid dynamics

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A comprehensive analysis of formation conditions,intrinsic properties,and mechanical responses of gas hydrate-bearing sediments

Rock Mechanics Bulletin

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Rock Mechanics Bulletin 2024年第2期3卷 39-62页

作者： Hualin Zhang Hanbing Bian Shuangxing Qi Jijing Wang Univ.Lille IMT Lille DouaiUniv.ArtoisJUNIAULR 4515-LGCgELaboratoire de Genie Civil et Geo-EnvironnementF-59000LilleFrance China National Chemical Southern Construction&Investment(Jiangxi)Co. LtdGanzhou 341499JiangxiChina School of Traffic&Transportation Engineering Changsha University of Science&TechnologyChangsha 410114HunanChina

Natural gas hydrates(NGH)stored in submarine deposits are a promising energy resource,Yet,the deterioration in sediment strength can trigger geological disasters due to drilling-induced hydrate ***,an in-depth investigation on geo physical-mechanical performance of gas hydrate-bearing sediments(GHBS)is crucial for recovery hydrates safely and *** paper provides a comprehensive assessment of the research progress on formation conditions,intrinsic properties,and mechanical responses of *** key findings have been presented:gas composition,inhibitors and promoters alter hydrate formation by modifying the thermodynamic equilibrium of temperature and ***,we identified the key determinants of porosity of GHBS and revealed the correlation between permeability,hydrate saturation,and hydrate ***,we highlighted the differences in mechanical behavior between hydrate-free sediments and GHBS along with their underlying ***,we examined the methods for GHBS preparation as well as the employed test apparatuses,providing critical insights into the limitations and *** synthe-sizing data from existing literature,we conducted a comprehensive analysis of the dependence of mechanical parameters of GHBS on factors such as hydrate saturation,effective confining stress,and temperature,and dis-cussed the mechanical responses subjected to various hydrate dissociation ***,we offer a perspective for future research to focus on the micro-scale aspects,heterogeneous distribution,and long-term stability of *** discerned patterns and mechanical mechanisms are expected to guide the improvement of predictive model for geo physical-mechanical behavior of GHBS and establish a reference for developing effective strategies for recovery hydrates.

关键词： Gas hydrate-bearing sediments Hydrate formation and dissociation Hydrate morphology geo physical-mechanical performance Recovery hydrates

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Tree structure and diversity shape the biomass of primary temperate mountain forests

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Forest Ecosystems 2024年第4期11卷 568-579页

作者： Dheeraj Ralhan Ruffy Rodrigo Heather Keith Annemiek Irene Stegehuis Jakob Pavlin Yumei Jiang Milos Rydval Juliana Nogueira Alexandre Fruleux Marek Svitok Martin Mikolas Daniel Kozak Martin Dusatko Pavel Janda Oleh Chaskovsky Catalin-Constantin Roibu Miroslav Svoboda Czech University of Life Sciences Prague Faculty of Forestry and Wood SciencesKamycka 129Suchdol16521 Praha 6Czech Republic Department of Forest Science Biliran Province State UniversityBiliran6549Philippines Griffith Climate Action Beacon Griffith UniversityParklands DriveSouthportGold CoastQueensland4222Australia laboratoire de geologie IPSLCNRSUMR 8538Ecole Normale SuperieurePSL UniversityParisFrance Univ.Lille Institut Mines-TelecomUniv.ArtoisJuniaULR 4515LGCgELaboratoire de Genie Civil et Geo-EnvironnementF-59000LilleFrance Department of Biology and General Ecology Faculty of Ecology and Environmental SciencesTechnical University in ZvolenMasaryka 2496001ZvolenSlovakia Institute of Forest Management Ukrainian National Forestry UniversityLvivUkraine Forest Biometrics Laboratory–Faculty of Forestry Stefan Cel Mare University of SuceavaUniversitații Street Number.13Suceava720229Romania

Primary forests are spatially diverse terrestrial ecosystems with unique characteristics,being naturally regenerative and heterogeneous,which supports the stability of their carbon storage through the accumulation of live and dead ***,little is known about the interactions between biomass stocks,tree genus diversity and structure across a temperate montane primary ***,we investigated the relationship between tree structure(variability in basal area and tree size),genus-level diversity(abundance,tree diversity)and biomass stocks in temperate primary mountain forests across Central and Eastern *** used inventory data from726 permanent sample plots from mixed beech and spruce across the Carpathian *** used nonlinear regression to analyse the spatial variability in forest biomass,structure,and genus-level diversity and how they interact with plot-level tree age,disturbances,temperature and *** found that the combined effects of genus and structural indices were important for addressing the variability in biomass across different spatial *** processes in disturbance regimes and uneven tree age support forest hete rogeneity and the accumulation of live and dead biomass through the natural regeneration,growth and decay of the forest *** complexities in basal area index,supporte d by genus-level abundance,positively influence total biomass stocks,which was modulated by tree age and *** forests showed higher tree density and basal area than mixed beech forests,though mixed beech still contributes significantly to biomass across *** heterogeneity was strongly influenced by complexities in forest composition(tree genus diversity,structure).We addressed the importance of primary forests as stable carbon stores,achieved through structure and *** such ecosystems is critical for ensuring the stability of the primary forest,carbon store and biodiversity into the future.

关键词： Biodiversity indicators Biomass carbon stock Ecosystem functioning Forest composition Primary forest structure Tree size distribution

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Smart technology applications for the optimal management of underground facilities

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Underground Space 2021年第5期6卷 551-559页

作者： Isam Shahrour Hanbing Bian Xiongyao Xie Zixin Zhang School of civil Engineering Tongji UniversityShanghai 200092China laboratoire de genie civil et geo-environnement Universite de LilleLille 59000France

This study centers on the use of smart technology to improve the lifecycle management of underground *** presents a comprehensive digital solution that addresses the challenges of underground facilities,particularly those related to the extensive use of underground space,as well as the requirements for safety,sustainability,and quality of *** proposed solution emerged from discussions with experts,companies,and cities involved in the design,construction,and management of underground *** this paper,we first discuss the major challenges of underground facilities,then,we present the development of a smart solution to address these *** study demonstrates a promising perspective for the use of smart technology in the optimal management of underground facilities,and paves the way for its implementation.

关键词： Artificial intelligence Lifecycle Safety Smart city Maintenance Smart technology Underground facilities

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Use of soft computing techniques for tunneling optimization of tunnel boring machines

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Underground Space 2021年第3期6卷 233-239页

作者： Isam Shahrour Wengang Zhang College of civil Engineering Tongji UniversityShanghai 200092China laboratoire genie civil et geo-environnement Universite de LilleFrance School of civil Engineering Chongqing UniversityChina

Thanks to advances in tunnel boring machine(TBM)and monitoring,significant progress has been achieved in the application of soft computing techniques for the optimization of TBM tunneling and the reduction of disturbance related to tunneling in urban *** experimental,analytical,and numerical methods have limitations in solving problems related to TBM tunneling,engineers can use soft computing techniques in analyzing the relationship between the target tunneling responses and influential design inputs parameters,including the geometrical,geological,and TBM operational *** techniques are useful in achieving robust and low-cost ***,engineers face difficulties in making an optimal choice of the soft computing technique to solve the complex problems related to TBM *** help with this choice,this study presents state of the art about the use of soft computing techniques in TBM tunneling through practical *** study proposes recommendations for the optimal use of these techniques,in particular(i)the importance of preliminary analyses for the selection and reduction of input parameters,(ii)the necessity to complete insufficient data using laboratory tests and numerical modeling,(iii)the selection of reduced number of hidden layers and nodes to avoid overfitting,(iv)the use of recurrent neural networks to deal with time-series data,and(v)the association of soft computing methods with hybrid optimization techniques to reduce the risk of convergence to local minima.

关键词： Soft computing Tunneling Tunnel boring machine Artificial neural network Machine learning Optimization Settlement Convergence Artificial intelligence

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A REVISED SOLUTION OF EQUIVALENT PERMEABILITY TENSOR FOR DISCONTINUOUS FRACTURES

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Journal of Hydrodynamics 2012年第5期24卷 711-717页

作者： HE Ji CHEN Sheng-hong SHAHROUR Isam State Key Laboratory of Water Resources and Hydropower Engineering Science Wuhan University 430072Wuhan China laboratoire genie civil et geo-environnement University Lille 1 59650 Villeneuve d Ascq France

The equivalent permeability tensor is essential to the application of the equivalent porous media model in the numerical seepage simulation for fractured rock masses. In this paper, a revised solution of the equivalent permeability tensor is proposed to represent the influence of the fracture connectivity in discontinuous fractures. A correction coefficient is involved to reflect the com- plex seepage flow type through the rock bridge. This correction coefficient is back analyzed from single-hole packer tests, based on the Artificial Neural Network （ANN） back analysis and the Finite Element Method （FEM） seepage simulation. The limitation of this back analysis algorithm is that the number of single-hole packer tests should be equal or greater than the number of fracture sets, and three is the maximum number of the fracture sets. The proposed solution and the back analysis algorithm are applied in the permea- bility measurement and the seepage simulation for the Xiaowan arch dam foundation.

关键词： discontinuous fractures permeability tensor back analysis packer test Artificial Neural Network (ANN)

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Prediction of Extractable Cd,Pb and Zn in Contaminated Woody Habitat Soils Using a Change Point Detection Method

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Pedosphere 2016年第3期26卷 282-298页

作者： Christophe WATERLOT Christelle PRUVOT Géraldine BIDAR Clémentine FRITSCH Annette DE VAUFLEURY Renaud SCHEIFLER Francis DOUAY Groupe ISA Laboratoire Genie Civil et geo-Environnement(LGCgE)Lille 59046(France) Departement Chrono-Environment UMR UFC/CNRS 6249 USC INRAUniversite Bourgogne Franche-ComteBesancon 25030(France)

Accumulation of heavy metals in soils poses a potential risk to plant production, which is related to availability of the metals in soil. The phytoavailability of metals is usually evaluated using extracting solutions such as salts, acids or chelates. The purpose of this study was to identify the most significant soil parameters that can be used to predict the concentrations of acetic and citric acidextractable cadmium(Cd), lead(Pb) and zinc(Zn) in contaminated woody habitat topsoils. Multiple linear regression models were established using two analysis strategies and three sets of variables based on a dataset of 260 soil samples. The performance of these models was evaluated using statistical parameters. Cation exchange capacity, CaCO_3, organic matter, assimilated P, free Al oxide,sand and the total metal concentrations appeared to be the main soil parameters governing the solubility of Cd, Pb and Zn in acetic and citric acid solutions. The results strongly suggest that the metal solubility in extracting solutions is extractable concentrationdependent since models were overall improved by incorporating a change point. This change point detection method was a powerful tool for predicting extractable Cd, Pb and Zn. Suitable predictions of extractable Cd, Pb and Zn concentrations were obtained, with correlation coefficient(adjusted r) ranging from 0.80 to 0.99, given the high complexity of the woody habitat soils studied. Therefore,the predictive models can constitute a decision-making support tool for managing phytoremediation of contaminated soils, making recommendations to control the potential bioavailability of metals. The relationships between acetic and/or citric acid-extractable concentrations and the concentrations of metals into the aboveground parts of plants need to be predicted, in order to make their temporal monitoring easier.

关键词： acetic acid citric acid contaminated soil extractability metals multiple linear regression model soil parameters

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Influence of soil saturation on the free field response of liquefiable soils

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Underground Space 2017年第1期2卷 30-37页

作者： Hanbing Bian Isam Shahrour Yun Jia Department of geotechnical Engineering School of Civil EngineeringTongji UniversityShanghai 200092China LEM3 UMR CNRS 7239 Universite de LorraineIle du Saulcy57045 MetzFrance laboratoire de genie civil et geo-environnement Universite de Lille59650 Villeneuve d’AscqFrance laboratoire de Mecanique de Lille Universitede Lille59650 Villeneuve d’AscqFrance

The present paper presents analysis of the influence of the soil saturation on the free-field response of liquefiable *** are conducted using a finite element program developed for partially saturated soils subjected to cyclic *** performances of the proposed model are analysed by simulation of undrained triaxial tests with different water *** finite element program is then used for the analysis of the influences of the soil saturation,density and position of the water table on the liquefaction of a soil layer subjected to cyclic *** show that the soil saturation significantly affects the liquefaction of partially saturated sandy *** decrease in the soil saturation results in a reduction of liquefaction risk.

关键词： Free field Liquefaction Dynamic Cyclic loading Seismic Numerical

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Mechanical Properties of Soil-Rock Mixture Filling in Fault Zone Based on Mesostructure

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Computer Modeling in Engineering & Sciences 2022年第8期132卷 681-705页

作者： Mei Tao Qingwen Ren Hanbing Bian Maosen Cao Yun Jia Department of Engineering Mechanics Hohai UniversityNanjing210098China laboratoire de genie civil et g´eo-environnement Universite de LilleLille59000France laboratoire de Mecanique MultiphysiqueMulti-´echelleUniversite de LilleLille59000France

Soil-rock mixture(SRM)filling in fault zone is an inhomogeneous geomaterial,which is composed of soil and rock *** controls the deformation and stability of the abutment and dam foundation,and threatens the long-term safety of high arch *** study the macroscopic and mesoscopic mechanical properties of SRM,the development of a viable mesoscopic numerical simulation method with a mesoscopic model generation technology,and a reasonable parametric model is crucially desired to overcome the limitations of experimental conditions,specimen dimensions,and experiment *** this end,this study presents a mesoscopic numerical method for simulating the mechanical behavior of SRM by proposing mesoscopic model generation technology based on its mesostructure features,and a rock parameter model considering size *** validity and rationality of the presented mesoscopic numerical method is experimentally verified by the triaxial compression tests with different rock block contents(RBC).The results indicate that the rock block can increase the strength of SRM,and it is proved that the random generation technique and the rock parameter model considering size effect are ***,there are multiple failure surfaces for inhomogeneous geomaterial of SRM,and the angle of the failure zone is no longer 45◦.The yielding zones of the specimen are more likely to occur in thin sections of soil matrix isolated by blocks with the failure path avoiding the rock *** proposed numerical method is effective to investigate the meso-damage mechanism of SRM.

关键词： Soil-rock mixture(SRM) triaxial compression tests random generation technique mesostructure rock parameter model size effect finite element method

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Predictive Study of Trace Metal Pollution of Gold Panning Sites in Birimian Formations: Case of the Yaouré Furrow (Côte d’Ivoire)

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Open Journal of Applied Sciences 2024年第7期14卷 1691-1714页

作者： Tonga Paul Tiemoko Gbele Ouattara Kouassi Ernest Ahoussi laboratoire des Sciences Gographiques du Gnie Civil et des Gosciences Institut National Polytechnique Flix Houphout-Boigny (INP-HB) Yamoussoukro Cte dIvoire laboratoiredes Sciences du Sol delEauetdes Gomatriaux Universit Flix Houphout-Boigny (UFHB) Abidjan-Cocody Cte dIvoire

The present study was carried out on small-scale gold mining sites in the Yaouré region of Côte d’Ivoire. This region is geologically representative of the Birimian formations (2.1 Ga) of West Africa. The aim is to determine the potentially toxic trace metals (TMEs) generated by these sites, with a view to preventing possible contamination and/or metal pollution of the waters that provide fish products for local populations. To this end, a sampling campaign was carried out, resulting in the collection of 20 mining waste samples analyzed by X-ray fluorescence spectrometry (XRF) and 10 by X-ray diffractometer (XRD). The XRF analysis detected 06 predominant TMEs: arsenic, chromium, copper, nickel, zinc and vanadium. Statistical analysis was carried out to determine the distributions and correlations between these etMs. To assess contamination and/or pollution levels, the following indices were calculated on the basis of reference concentrations of upper continental crust MTEs: Enrichment Factor, geo-accumulation Index, Concentration Factor, Degree of contamination and those related to ecological risks. The results of statistical analyses and indices have shown that arsenic and chromium are the most predominant and can be, depending on the chemical form, potentially more toxic. The results of the DRX analysis show the occurrence of several minerals carrying these two MTEs, especially that of a rare mineral, Stenhuggarite, an arsenic oxide linked to hydrothermal veins. The majority of gold mining operations in West Africa are located in the birimian zone, hence the need for environmental monitoring by the relevant authorities, to prevent potential ecological risks to water and possibly health risks via the food chain.

关键词： Small-Scale Mining Metallic Trace Elements Mining Discharges Contamination Pollution Contamination Pollution Index

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