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Journal articles on the topic 'Geometric cohesion'

Author: Grafiati
Published: 17 May 2025
Last updated: 31 July 2025

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1

Franklin, Scott V. "Geometric cohesion in granular materials." Physics Today 65, no. 9 (2012): 70–71. http://dx.doi.org/10.1063/pt.3.1726.

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2

Duarte, Anderson Ribeiro, Luiz Duczmal, Sabino José Ferreira, and André Luiz F. Cançado. "Internal cohesion and geometric shape of spatial clusters." Environmental and Ecological Statistics 17, no. 2 (2010): 203–29. http://dx.doi.org/10.1007/s10651-010-0139-7.

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3

Aponte, D., N. Estrada, J. Barès, M. Renouf, and E. Azéma. "Experimental Study of Granular Materials Composed of Platonic Polipods: Exploring Geometric Cohesion and Solid Fraction." IOP Conference Series: Earth and Environmental Science 1480, no. 1 (2025): 012118. https://doi.org/10.1088/1755-1315/1480/1/012118.

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Abstract In this study, we explored the stability and compactness of columns formed from highly irregular particles. These particles, known as Platonic polypods, are fashioned by extruding arms onto the faces of Platonic solids, for which we systematically varied the number and thickness of these arms. We investigated the emergence and vanishing of geometric cohesion (i.e., solid-like characteristics, in the absence of adhesive forces among particles). We first built columns by depositing particles within a cylindrical container, which was then removed to assess the structure’s stability. Expe
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4

Scheffler, Otto C., and Corné J. Coetzee. "Discrete Element Modelling of a Bulk Cohesive Material Discharging from a Conveyor Belt onto an Impact Plate." Minerals 13, no. 12 (2023): 1501. http://dx.doi.org/10.3390/min13121501.

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The discrete element method (DEM) has become the numerical method of choice for analysing and predicting the behaviour of granular materials in bulk handling systems. Wet-and-sticky materials (WSM) are especially problematic, resulting in build-up and blockages. Furthermore, due to the large number of particles in industrial-scale applications, it is essential to decrease the number of particles in the model by increasing their size (upscaling or coarse graining). In this study, the accuracy with which upscaled DEM particles can model the discharge of a cohesive material from a belt conveyor o
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Krasnyi, B. L., N. A. Makarov, K. I. Ikonnikov, et al. "Technology of manufacturing large-format ceramic refractory products of different composition and structure by 3D printing. Part 1. The principle of form building." NOVYE OGNEUPORY (NEW REFRACTORIES), no. 7 (November 30, 2023): 12–16. http://dx.doi.org/10.17073/1683-4518-2023-7-12-16.

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The technology of 3D printing of large-format ceramic refractories used in thermal units and in refractory equipment has been developed. The proposed technology makes it possible, due to the capillary effect at the grain boundary in printed layers, to achieve very high interlayer cohesion and thereby obtain ceramic refractory products not limited by geometric dimensions and shape, including the finished lining of any thermal units.
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Zhao, Chuan, Linlin Jiang, Xin Lu, and Xiang Xiao. "Analysis of Wet Soil Granular Flow down Inclined Chutes Using Discrete Element Method." Water 11, no. 11 (2019): 2399. http://dx.doi.org/10.3390/w11112399.

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This paper presents numerical simulation and analysis of two numerical experiments of wet soil granular flow down inclined chutes based on the JKR(Johnson-Kendall-Roberts)-cohesion model of the discrete element method. JKR is a cohesive contact model, which can reflect the influence of van der Waals forces in the contact range to simulate cohesive granular matter. A surface energy coefficient kw was proposed to reflect the liquid surface tension between particles, and maximum surface energy (γmax) of wet soil composed of uniform particles was obtained at 0.2 J/m2. Computational results show th
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Lammali, Walid, Jean-Noël Roux, and Anh-Minh Tang. "Quasistatic response of loose cohesive granular materials." EPJ Web of Conferences 249 (2021): 14021. http://dx.doi.org/10.1051/epjconf/202124914021.

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DEM-simulated model cohesive assemblies of spherical grains of diameter d, with contact tensile strength F0, once prepared in loose states, are quasistatically subjected to growing isotropic pressure P, and then to triaxial compression, maintaining lateral stresses σ2 = σ3 = P while increasing axial stress σ1 = P + q and strain є1. Reduced pressure P* = d2P/F0 varies from 0.1 (cohesion dominated case, for which systems typically equilibrate with solid fraction Ф ≃ 0.35), to large values for which the cohesionless behavior is retrieved. In triaxial compression, while the moderate strain respons
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8

Makul, Natt. "Perspective/Discussion on “Quantum Mechanical Metric for Internal Cohesion in Cement Crystals” by C. C. Dharmawardhana, A. Misra and Wai-Yim Ching." Crystals 11, no. 12 (2021): 1450. http://dx.doi.org/10.3390/cryst11121450.

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The single most important structural material, and the major Portland cement binding phase in application globally, is calcium silicate hydrate (C-S-H). The concentration has increasingly changed due to its atomic level comprehension because of the chemistry and complex structures of internal C-S-H cohesion in cement crystals at different lengths. This perspective aimed at describing on calcium-silicate-hydrates (C-S-H) structures with differing contents of Ca/Si ratio based on the report entitled “Quantum mechanical metric for internal cohesion in cement crystals” published by C. C. Dharmawar
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9

Keba Lukueta, Eric, and Koichi Isobe. "Bearing Capacity of a Shallow Foundation above the Soil with a Cavity Based on Rigid Plastic Finite Element Method." Applied Sciences 14, no. 5 (2024): 1975. http://dx.doi.org/10.3390/app14051975.

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Based on the Rigid Plastic Finite Element Method (RPFEM), this study investigates the performance of the footing on the soil with a cavity. The RPFEM is used in plane strain conditions and necessitates only a few materials to predict the bearing capacity: the unit weight of the soil, the cohesion, the shear resistance angle, and the dilation angle. Considering diverse soil types, including cohesive and intermediate soils, the findings are presented through dimensionless 2D charts in which the horizontal axis X and vertical axis Y are normalized to parameters R and H, representing the horizonta
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10

Gapova, Elena. "Things to Have for a Belarusian: Rebranding the Nation via Online Participation." Digital Icons: Studies in Russian, Eurasian and Central European New Media, no. 17 (June 7, 2017): 47–71. https://doi.org/10.5281/zenodo.14716275.

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The paper focuses on online consumer activism targeting Belarusian vyshyvanka, i.e. commodities with geometric ornament. Its reinvention was spurred by a global trend of nation branding and by post-socialist nation building. The consumption of ornamented products incites ‘rebranding of the nation’ which gets resemanticized and reinvented via online user-led content creation, as prosumers, often younger cosmopolitan urbanites, like, share, discuss, remix and perform other kinds of digital manipulations with recognizable geometric imagery. In their online incarnations, ornamented pro
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11

Ali, Waqar, Amani Milinga, Tao Luo, et al. "Rubber plant root properties induce contrasting soil aggregate stability through cohesive force and reduced land degradation risk in southern China." SOIL 11, no. 2 (2025): 507–21. https://doi.org/10.5194/soil-11-507-2025.

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Abstract. In southern China, the island of Hainan faces land degradation risks due to a combination of soil physical, chemical, and climatic factors: soil physical properties like a high proportion of microaggregates (<0.25 mm), chemical properties such as low soil organic matter (SOM) content, and a climatic factor of frequent uneven rainfall. The cohesive force between soil particles, which is influenced by plant root properties and root-derived SOM, is essential for improving soil aggregate stability and mitigating land degradation. However, the mechanisms by which rubber plant root prop
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12

Rajakumar, C., and P. Kodanda Rama Rao. "Slope Stability Analysis of Kattery Watershed in Nilgiris District." International Journal of ChemTech Research 12, no. 6 (2019): 163–69. http://dx.doi.org/10.20902/ijctr.2019.120621.

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The slope stability analysis is always under severe threats in many parts of nilgiris district, causing disruption, loss of human life and economy. The stability of slopes depends on the soil shear strength parameters such as Cohesion, Angle of internal friction, Unit weight of soil and Slope geometry. The stability of a slope is measured by its factor of safety using geometric and shear strength parameter based on infinite slopes. In this research, investigation was carried out at 5 locations in Kattery watershed in nilgiris district. The factor of safety of the slope determined by Mohr Coulo
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13

Zayatzev, Andrey, Albina Lukianova, Dmitry Demoretsky, and Yulia Alexandrova. "Evaluation of the influence geometric parameters of a cylindrical specimen for tensile adhesion testing of thermally sprayed coating." E3S Web of Conferences 402 (2023): 09001. http://dx.doi.org/10.1051/e3sconf/202340209001.

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The problem of calculating the required adhesion strength and the accuracy of measuring the adhesive/cohesive strength of thermally sprayed coatings (thermal barrier, electrically insulating, irradiation) on a cylindrical test specimen is of practical interest from the point of view of improving the reliability of highly loaded parts of internal combustion engines of agricultural machines, various parts of the aerospace and nuclear industries. There have been carried out a set of studies on the application in practice of standard test method for assessing adhesion or cohesion strength of elect
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14

Meng, Suyun, Guoqing Zhao, and Yuyou Yang. "Impact of Plant Root Morphology on Rooted-Soil Shear Resistance Using Triaxial Testing." Advances in Civil Engineering 2020 (November 5, 2020): 1–13. http://dx.doi.org/10.1155/2020/8825828.

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Mechanical reinforcement by plant roots increases the soil shearing strength. The geometric and distribution characteristics of plant roots affect the soil shearing strength. Current research on the shear strength of rooted-soil is mostly based on direct shear tests with a fixed shear surface and thus cannot reflect the actual failure state of the rooted-soil. In this study, Golden Vicary Privet was used to create a rooted-soil, and a triaxial test method was used for soil mechanical property analysis. The influence of the root geometry (root diameter and individual root length) and distributi
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15

Yang, Yu, and Ning Li. "Quantitative Assessment of Rock Burst Risk in Roadway Tunneling Considering Variation of Coal Mass Parameters." Applied Sciences 14, no. 18 (2024): 8211. http://dx.doi.org/10.3390/app14188211.

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To investigate the influence of varied mechanical parameters of coal mass on rock burst occurrence during deep roadway tunneling, the surrounding coal and rock mass of a deep roadway were taken as the research objects. A geometric model of roadway tunneling was developed using 3DEC numerical simulation software, and the failure characteristics of the coal mass in the roadway side were analyzed based on the rock burst mechanism and stress difference gradient theory for deep mining. The risk of rock burst during roadway tunneling was quantitatively assessed using the change rate of the stress di
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16

Schiavone, Nicola, Vincent Verney, and Haroutioun Askanian. "Pozzolan Based 3D Printing Composites: From the Formulation Till the Final Application in the Precision Irrigation Field." Materials 14, no. 1 (2020): 43. http://dx.doi.org/10.3390/ma14010043.

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A new eco-composite polymer for material extrusion fabrication based on fine fraction pozzolan waste was developed. In addition, the composite materials obtained were used to produce a self-watering pot with complex geometry and a permeable porous part to regulate the passage of water from the storage area to the roots of the plant. Moreover, the system was devised with a cover characterized by a UV-B barrier film. The results have shown the possibility of the 3D printing of complex geometric parts as microporous structures or thin films using a composite based on poly lactic acid (PLA) and po
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17

Chatziangelou, M., and B. Christaras. "Influence of the geometric characteristics of wedges on the safety of Vrasna tunnel in Egnatia highway, N. Greece." Bulletin of the Geological Society of Greece 40, no. 4 (2007): 1634. http://dx.doi.org/10.12681/bgsg.17067.

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The present paper concerns the influence of the geometric characteristics of the potential wedges on tunnels safety, which are supported by shotcrete and rock bolts, during the excavation of poor and medium quality rock mass, in accordance to RMR classification system. The geological and tectonic data which were used in our estimations were collected in situ during the excavation of Vrasna's tunnel. According to shear test along discontinuities planes, friction angle was considered 21° on schistosity planes and 35° on joint planes. Furthermore, no cohesion was taken into account, as the fractu
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18

Putsiata, A. V., A. O. Shimanovsky, M. G. Gegedesh, and P. M. Afanaskou. "IMPROVMENT OF THE RAILWAY ROLLING STOCK DESIGN ON THE BASE OF TRANSPORTED CARGO DEFORMATION CONSIDERATION." Bulletin of Russian academy of natural sciences 24, no. 1 (2024): 75–83. http://dx.doi.org/10.52531/1682-1696-2024-24-1-75-83.

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The features of solving problems on the railway rolling stock design dynamics and strength on the basis of computer modeling in engineering packages of solid-state and finite element analysis are considered taking into account high deformability of the transported cargo. There are demonstrated the results of the analysis of rails fastening dynamics for the case of rails transportation on the coupling of railway platforms. The stresses and deformations in the C11N17 T11 tank container at the longitudinal impact of cars are investigated. There is presented the analysis of the bulk cargo cohesion
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19

Niewiadomska-Kaplar, Justyna. "New Approach to the Molecular Electronics of Graphene." Materials Science Forum 1058 (April 5, 2022): 63–78. http://dx.doi.org/10.4028/p-g8qm59.

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The structure of graphene has been described in this research work by introducing some innovative elementary theoretical concepts such as: - interpretation of the free electron pair not as a concentration of the electron cloud on one side of the nucleus (lone pair), but as a symmetrical distribution of the electron cloud on both sides, - hypothesis that in polar bonds and the vast majority of multiple bonds, one electron is shared, not an electron pair and distinction of intermolecular bonds in bi-electronic and mono-electronic, - interpretation of the transformation of the geometry of molecul
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20

Lim, Hyunsung, Seunghwan Seo, Junyoung Ko, and Moonkyung Chung. "Effect of Joint Characteristics and Geometries on Tunnel-Type Anchorage for Suspension Bridge." Applied Sciences 11, no. 24 (2021): 11688. http://dx.doi.org/10.3390/app112411688.

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In this study, the pull-out behavior of a tunnel-type anchorage was examined by considering both geometric and rock joint characteristics. Three-dimensional finite element analyses were performed with reference to the tunnel-type anchorage cases designed and constructed in Korea. The factors influencing the anchorage response were analyzed: the enlarged part, anchorage spacing, joint orientation, spacing, and the shear strength of the rock joints. According to the numerical studies, the size of the enlarged part influenced the failure shape of the tunnel-type anchorage. It was found that the a
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21

Wu, Qiang, Yan Dong, and Liping Xie. "Finding the Key Structure of Mechanical Parts with Formal Concept Analysis." Information 11, no. 2 (2020): 116. http://dx.doi.org/10.3390/info11020116.

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Aiming at the problem that the assembly body model is difficult to classify and retrieve (large information redundancy and poor data consistency), an assembly body retrieval method oriented to key structures was presented. In this paper, a decision formal context is transformed from the 3D structure model. The 3D assembly structure model of parts is defined by the adjacency graph of function surface and qualitative geometric constraint graph. The assembly structure is coded by the linear symbol representation of compounds in chemical database. An importance or cohesion as the weight to a decis
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22

di Filippo, A., S. Antinozzi, M. Limongiello, and B. Messina. "AN EFFECTIVE APPROACH FOR POINT CLOUD DENOISING IN INTEGRATED SURVEYS." International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences XLVIII-2/W4-2024 (February 14, 2024): 181–87. http://dx.doi.org/10.5194/isprs-archives-xlviii-2-w4-2024-181-2024.

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Abstract. Outliers and noise in point cloud data are unavoidable due to intrinsic and/or extrinsic survey factors. Significant errors may result from false geometry produced by a collection of anomalies, compounded by sparse structure, irregular densities, and lack of geometric cohesion typical of point clouds nature. Thus, filtering techniques on raw data are required to produce accurate point clouds suitable for further processing. This objective is pursued in the following study through a comparative analysis between two registered clouds, one obtained from TLS, used as reference dataset an
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23

Buchanan, P., and K. W. Savigny. "Factors controlling debris avalanche initiation." Canadian Geotechnical Journal 27, no. 5 (1990): 659–75. http://dx.doi.org/10.1139/t90-079.

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Heavy rainfall during a January 1983 storm triggered numerous debris avalanches and associated debris torrents in the Smith Creek basin, western Whatcom County, Washington, United States. Four classes of debris avalanches are recognized: wedges, drainage depressions, logging roads, and discontinuity surfaces. Nine different debris avalanche headscarps that are representative of these four classes are studied in detail. The geometric configuration of each headscarp, the properties of soils comprising the headscarps, and water tables based on numerical models of hillslope hydrology are used in l
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Al-Jokhadar, Amer, and Wassim Jabi. "APPLYING THE VERNACULAR MODEL TO HIGH-RISE RESIDENTIAL DEVELOPMENT IN THE MIDDLE EAST AND NORTH AFRICA." International Journal of Architectural Research: ArchNet-IJAR 11, no. 2 (2017): 175. http://dx.doi.org/10.26687/archnet-ijar.v11i2.1254.

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In the age of globalisation and continuous urbanisation, architects have a greater responsibility to design residential buildings with comfortable and sustainable environments. However, sustainable solutions should not concern themselves only with utilising technology, but also with creating synergies amongst a community’s social, cultural, historical, and environmental aspects. This research focuses on the implications of this wider definition of sustainability within the hot-arid climates of the Middle East and North Africa. Most of the current high-rise residential buildings in these region
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LUO Rudan, ZENG Zhikun, GE Zhuan, JIANG Yonglun, and WANG Yujie. "Experimental Study on The Packing Structure of "Hexapod" Concave Particles under Tapping based on X-Ray Tomography." Acta Physica Sinica 74, no. 13 (2025): 0. https://doi.org/10.7498/aps.74.20250231.

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Granular materials are ubiquitous in nature and industrial production. Investigating the structure of packing is crucial for understanding the physical properties of granular materials. Owing to their symmetry and simple geometry, spherical particles have long served as an ideal model for studying granular packing, yielding numerous research outcomes.<br>In recent years, the influence of particle shape on packing structures has drawn considerable attention. Non-spherical particles, characterized by complex shapes, tend to interlock and form stable structures. Their significant geometric
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26

Almeida, Susana, Elizabeth Ann Holcombe, Francesca Pianosi, and Thorsten Wagener. "Dealing with deep uncertainties in landslide modelling for disaster risk reduction under climate change." Natural Hazards and Earth System Sciences 17, no. 2 (2017): 225–41. http://dx.doi.org/10.5194/nhess-17-225-2017.

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Abstract. Landslides have large negative economic and societal impacts, including loss of life and damage to infrastructure. Slope stability assessment is a vital tool for landslide risk management, but high levels of uncertainty often challenge its usefulness. Uncertainties are associated with the numerical model used to assess slope stability and its parameters, with the data characterizing the geometric, geotechnic and hydrologic properties of the slope, and with hazard triggers (e.g. rainfall). Uncertainties associated with many of these factors are also likely to be exacerbated further by
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27

Thalmann, William G. "““The Most Divinely Approved and Political Discord””: Thinking about Conflict in the Developing Polis." Classical Antiquity 23, no. 2 (2004): 359–99. http://dx.doi.org/10.1525/ca.2004.23.2.359.

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Abstract This paper considers literary responses to the role of competition in the polis of the late Geometric and Archaic periods through the semantics of the word eris (““strife,”” ““discord””), with particular reference to Hesiod's account of the two Erides at Works and Days 11––26. As Homeric and Epic Cycle usage makes clear, the innovation in this passage is not the assertion that there is a positive as well as a destructive form of eris but the qualitative polarization between them. This polar opposition is a reflex of, and an attempt to gain cognitive mastery over, a fundamental cultura
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28

Costa, Wagner Silva, Plácido R. Pinheiro, Nádia M. dos Santos, and Lucídio dos A. F. Cabral. "Aligning the Goals Hybrid Model for the Diagnosis of Mental Health Quality." Sustainability 15, no. 7 (2023): 5938. http://dx.doi.org/10.3390/su15075938.

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The social distancing imposed by the COVID-19 pandemic has been described as the “greatest psychological experiment in the world”. It has tested the human capacity to extract meaning from suffering and challenged individuals and society in Brazil and abroad to promote cohesion that cushions the impact of borderline experiences on mental life. In this context, a survey was conducted with teachers, administrative technicians, and outsourced employees at the Federal Institute of Piauí (IFPI). This educational institution offers professional and technological education in Piauí, Brazil. This study
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29

F., William Lawvere. "Birkhoff's theorem from a geometric perspective: A simple example." Categories and General Algebraic Structures with Applications 4, no. 1 (2016): 1–7. https://doi.org/10.5281/zenodo.7079058.

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From Hilbert's theorem of zeroes‎, ‎and from Noether's ideal theory‎, ‎Birkhoff derived certain algebraic concepts (as explained by Tholen) that have a dual significance in general toposes‎, ‎similar to their role in the original examples of algebraic geometry‎. ‎I will describe a simple example that illustrates some of the aspects of this relationship‎. The dualization from algebra to geometry in the basic Grothendieck spirit can be accomplished (without the intervention of topological spaces) by the following method‎, ‎known as Isbell conju
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Khodaei, Meysam, Ebrahim Biniaz Delijani, Mastaneh Hajipour, Kasra Karroubi, and Ali Naghi Dehghan. "Analyzing the correlation between stochastic fracture networks geometrical properties and stress variability: a rock and fracture parameters study." Journal of Petroleum Exploration and Production Technology 11, no. 2 (2021): 685–702. http://dx.doi.org/10.1007/s13202-020-01076-z.

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AbstractIn this study, the correlation between geometric properties of the fracture network and stress variability in a fractured rock was studied. Initially, discrete fracture networks were generated using a stochastic approach, then, considering the tensorial nature of stress, the stress field under various tectonic stress conditions was determined using finite-difference method. Ultimately, stress data were analyzed using tensor-based mathematical relations. Subsequently, the effects of four parameters including rock tensile strength, rock cohesion, fracture normal stiffness and fracture di
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Md., Mahmud Sazzad, and Mohayminul Islam Md. "Stability Analysis of an Earthen Embankment Dam with Internal Clay Core." Journal of Water Resources and Pollution Studies 4, no. 1 (2019): 1–9. https://doi.org/10.5281/zenodo.2629532.

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This study aims at evaluating the effect of the material properties of dam, saturation conditions and seismic loads on the stability of earthen embankment dam with internal clay core by using Limit Equilibrium Method (LEM). The cross-section of two dimensional geometric model of the earthen embankment dam with internal clay core is incorporated in GEO5, a tool for analyzing the LEM based slope stability problems. The factor of safety of earthen embankment dam with internal clay core is calculated by using Bishop, Spencer, Fellenius, Janbu and Morgenstern-Price methods. From the analysis, it is
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McKENNA-NEUMAN, C., and W. G. NICKLING. "A THEORETICAL AND WIND TUNNEL INVESTIGATION OF THE EFFECT OF CAPILLARY WATER ON THE ENTRAINMENT OF SEDIMENT BY WIND." Canadian Journal of Soil Science 69, no. 1 (1989): 79–96. http://dx.doi.org/10.4141/cjss89-008.

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A theoretical model of the effect of small amounts of water on the threshold shear velocity of sand grains has been tested in wind-tunnel studies. The model is based upon the capillary forces developed at interparticle contacts surrounded by isolated wedges of water. These forces (Fc) are inversely proportional to moisture tension (P) and directly proportional to the geometric properties of the contacts (G). Given[Formula: see text]the cohesion of the material decreases with increasing moisture tension and particle angularity. The incorporation of this capillary force model into Bagnold's thre
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33

Jahangir, Vafa, Maziyar S. Yaghmaee, and Reza Riahifar. "Macro-to-Nano Scale Modeling the Effect of Surface Energies on Surface Melting Phenomena in Metallic NanoTubes/Wires." Advanced Materials Research 829 (November 2013): 236–43. http://dx.doi.org/10.4028/www.scientific.net/amr.829.236.

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Among nonomaterial with different geometric shapes, nanotubes and nanowires received special attentions with increasing applications in electronic industry and nanorobotic due to their unique properties. Therefore, in order to study the fundamental properties of nanotubes/wires, in this paper we will focus on modeling the melting of different crystal surface of metallic materials. Although there are different models in literature based on change of cohesion energy or coordination number at nanoscale, here we present a generalized thermodynamics model which considers layer by layer melting of n
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34

Peng, Ming Xiang, and Jing Chen. "Coulomb’s solution to seismic passive earth pressure on retaining walls." Canadian Geotechnical Journal 50, no. 10 (2013): 1100–1107. http://dx.doi.org/10.1139/cgj-2012-0392.

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The conventional Mononobe–Okabe method is widely used in practice, but is only applicable for calculating total seismic earth pressure of cohesionless soil, not for solving earth pressure distribution. Based on limit equilibrium theory, the backfill is considered to be an ideal elastic–plastic material that obeys the Mohr–Coulomb yield criterion, and a family of slip-lines in the plastic zone is assumed to be a group of straight lines, i.e., planar slip surfaces. Influencing factors including inclination of wall, slope angle of backfill, cohesion and friction angle of soil, adhesion and fricti
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Etienne, Cyril, Christophe Mallet, Raphaël Cornette, and Alexandra Houssaye. "Influence of mass on tarsus shape variation: a morphometrical investigation among Rhinocerotidae (Mammalia: Perissodactyla)." Biological Journal of the Linnean Society 129, no. 4 (2020): 950–74. http://dx.doi.org/10.1093/biolinnean/blaa005.

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Abstract Many tetrapod lineages show extreme increases in body mass in their evolutionary history, associated with important osteological changes. The ankle joint, essential for foot movement, is assumed to be particularly affected in this regard. We investigated the morphological adaptations of the astragalus and the calcaneus in Rhinocerotidae, and analysed them in light of a comparative analysis with other Perissodactyla. We performed 3D geometric morphometrics and correlated shape with centroid size of the bone and body mass of the species. Our results show that mass has an influence on bo
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Pérez-Escudero, Alfonso, and Gonzalo G. de Polavieja. "Adversity magnifies the importance of social information in decision-making." Journal of The Royal Society Interface 14, no. 136 (2017): 20170748. http://dx.doi.org/10.1098/rsif.2017.0748.

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Decision-making theories explain animal behaviour, including human behaviour, as a response to estimations about the environment. In the case of collective behaviour, they have given quantitative predictions of how animals follow the majority option. However, they have so far failed to explain that in some species and contexts social cohesion increases when conditions become more adverse (i.e. individuals choose the majority option with higher probability when the estimated quality of all available options decreases). We have found that this failure is due to modelling simplifications that aid
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37

Gebrelibanos, Kalekirstos G., Kaspar Vereide, Sirak A. Weldemariam, Asli Bor, Asfafaw H. Tesfay, and Leif Lia. "Hydraulic Scale Modeling of Pressurized Sediment Laden Flow." Water 17, no. 13 (2025): 1970. https://doi.org/10.3390/w17131970.

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In hydropower tunnel systems, unlined pressurized tunnels in competent rock are commonly used for cost-effective construction. Incorporating pressurized sand traps at the downstream end of these tunnels can increase plant capacity and improve energy efficiency. The present work focuses on optimizing the performance of existing pressurized sand traps. Hydraulic scale models were developed and tested at the Hydraulic Laboratory of NTNU, Within the 960 MW Tonstad Hydropower Plant in southern Norway as a case study. This study compares 1:1 velocity/sediment scaling with Froude scaling through phys
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38

Yang, Peiju, Shurong Zhang, and Changyou Liu. "Study on Shear Failure Process and Zonal Disintegration Mechanism of Roadway under High Ground Stress: A Numerical Simulation via a Strain-Softening Plastic Model and the Discrete Element Method." Applied Sciences 14, no. 10 (2024): 4106. http://dx.doi.org/10.3390/app14104106.

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Fracture expansion in rock masses can be observed by monitoring the break of contacts between the bounding particles via the discrete element method. The latter’s realization in this study via the PFC2D program tracked the evolution process of the zonal disintegration in an exemplary roadway-surrounding rock affected by mining. Besides, the damage evolution pattern in a high-stress soft rock roadway was simulated by the FLAC2D program using a strain-softening plastic model, revealing the effects of rock mass strength, stress state, and anchor support on the zonal disintegration of the roadway.
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39

Shrestha, Saurav, Indra Prasad Acharya, and Ranjan Kumar Dahal. "Deterministic and Probabilistic Analysis of Dasdhunga Soil Slope along Narayangarh-Mugling Road Section." Journal of Advanced College of Engineering and Management 6 (July 10, 2021): 187–98. http://dx.doi.org/10.3126/jacem.v6i0.38358.

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Instability of slopes is usually governed by a combination of intrinsic and extrinsic factors. The inherent variability of parameters make the problem probabilistic rather than a deterministic one. This research deals with evaluation of stability of slopes with the calculation of the factor of safety of Dasdhunga soil slope along Narayangarh- Mugling road section under different rainfall conditions through the use of coupled finite element and limit equilibrium method in GeoStudio and the determination of probability of failure by sliding, modeled as infinite slopes by using Monte Carlo simula
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40

Julianto, Baskoro Tri, and Sitti Filzha Fitrya Ginoga. "Sand Slope Stability Analysis Using the Bishop Simplified Hyrcan 2.0 Method with CaCO3 Reinforcement." Journal of Civil Engineering and Planning 6, no. 1 (2025): 18–23. https://doi.org/10.37253/jcep.v6i1.9979.

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Slopes are open land surfaces that form an angle and therefore their stability and safety factors need to be considered. This research aims to analyze the stability of sand slopes using the Bishop Simplified method in Hyrcan 2.0 software with the addition of calcite (CaCO3) as a reinforcement method. Sand slopes have low stability due to low cohesion and lack of interaction between particles, which is exacerbated by the influence of groundwater. The addition of CaCO3 in various concentrations (0%, 10%, and 20%) was applied to improve the shear strength parameters of the sand slope. The simulat
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41

Antico, Federica, Ana Ricardo, and Rui Ferreira. "The Logarithmic Law of the Wall in Flows over Mobile Lattice-Arranged Granular Beds." Water 11, no. 6 (2019): 1166. http://dx.doi.org/10.3390/w11061166.

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The purpose of the present paper is to provide further insights on the definition of the parameters of the log-law in open-channel flows with rough mobile granular beds. Emphasis is placed in the study of flows over cohesionless granular beds composed of monosized spherical particles in simple lattice arrangements. Potentially influencing factors such as grain size distribution, grain shape and density or cohesion are not addressed in this study. This allows for a preliminary discussion of the amount of complexity needed to obtain the log-law features observed in more realistic open-channel fl
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42

Gowda, Chandan, Fabio P. Figueiredo, Joaquim A. O. Barros, and António Ventura-Gouveia. "A numerical finite element study on connections of SFRC offshore wind towers with prestressed CFRP reinforcement and steel connectors." RILEM Technical Letters 5 (December 15, 2020): 101–13. http://dx.doi.org/10.21809/rilemtechlett.2020.117.

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The growing need for sustainable production of electricity highlights the importance and the necessity of having higher number and more effective offshore wind towers. The rapid growth of offshore wind towers is estimated to produce 4% of electricity demands in Europe by the end of 2020. The research described in this paper is part of a project dedicated for the development of innovative structural system using advanced materials for lightweight and durable offshore towers. Specifically, it discusses the nonlinear finite element modelling of the connection between representative prefabricated
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43

Cimini, Angela, Paolo De Fioravante, Ines Marinosci, et al. "Green Urban Public Spaces Accessibility: A Spatial Analysis for the Urban Area of the 14 Italian Metropolitan Cities Based on SDG Methodology." Land 13, no. 12 (2024): 2174. https://doi.org/10.3390/land13122174.

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Among the most significant impacts related to the spread of settlements and the densification of urban areas, the reduction in the availability of public green spaces plays a central role in the definition of livable cities, in terms of the environment and social cohesion, interaction, and equality. In the framework of target 11.7 of the Sustainable Development Goals (SDG) 11, the United Nations has established the objective of ensuring universal, safe, and inclusive access to public spaces by 2030, for women, children, the elderly, and people with disabilities. This study proposes the evaluat
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44

Yang, Dayong, Furui Wei, Wei Wang, Yuchen Zhang, and Lingxin Zeng. "Finite Element Modelling and Experimental Validation of the Graphite Cutting Process." Processes 11, no. 9 (2023): 2546. http://dx.doi.org/10.3390/pr11092546.

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Graphite is extensively used in the engineering field due to its unique properties, and the study of its cutting mechanism has become particularly important. However, the brittle fracture mechanism of graphite makes it rather easy for cracks with a unique pattern of initiation and growth to develop when processing. Herein, the ABAQUS was selected to establish a finite element model (FEM) of the graphite cutting process. The internal crystal structure of graphite was modelled by a Voronoi structure, and a cohesion unit was globally embedded into the solid unit to simulate crack initiation and g
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Al-Turaihi, Ahmed, Jaffar Al-Zubaydi, and Jwad Manii. "Engineering and Minerological Characteristics of Sand Dunes of Babylon Governorate, Iraq." Iraqi Geological Journal 56, no. 1E (2023): 247–58. http://dx.doi.org/10.46717/igj.56.1e.19ms-2023-5-29.

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The engineering and mierological of sand dunes has been investigated in this paper. The engineering characteristics study involved studying the dimensions of the dunes, their slope angles, analyzing the curvature of their surfaces and sieve analysis. The mierological characteristics included XRD, XRF, and Thin section for specimens. The investigated area involved three differnts zones lie in the Babylon Governorate in the cnter of Iraq. The zones are called Ramlet Rashid, Ramlet Albu Faris and Birmana area. It has a desert environment, which is characterized by little rainfall, ranging from 50
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Asteris, Panagiotis G., Fariz Iskandar Mohd Rizal, Mohammadreza Koopialipoor, et al. "Slope Stability Classification under Seismic Conditions Using Several Tree-Based Intelligent Techniques." Applied Sciences 12, no. 3 (2022): 1753. http://dx.doi.org/10.3390/app12031753.

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Slope stability analysis allows engineers to pinpoint risky areas, study trigger mechanisms for slope failures, and design slopes with optimal safety and reliability. Before the widespread usage of computers, slope stability analysis was conducted through semi analytical methods, or stability charts. Presently, engineers have developed many computational tools to perform slope stability analysis more efficiently. The challenge associated with furthering slope stability methods is to create a reliable design solution to perform reliable estimations involving a number of geometric and mechanical
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47

Zahran, Khaled, and Hany El Naggar. "Effect of Sample Size on TDA Shear Strength Parameters in Direct Shear Tests." Transportation Research Record: Journal of the Transportation Research Board 2674, no. 9 (2020): 1110–19. http://dx.doi.org/10.1177/0361198120934482.

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Tire-derived aggregate (TDA), a relatively new construction material, has been gaining acceptance as a backfill material for embankments, trenches, and earth-retaining structures because of its lightweight and excellent geotechnical properties. Type A TDA has a basic geometric shape, with particles approximately 12 to 100 mm in size. As a result of the simplicity and accuracy of the direct shear test, most laboratories choose this test in preference to more complex tests. However, TDA requires large-scale direct shear apparatus because of the consistently large size of its particles, and few f
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48

Feng, Xiaojun, Zeng Ding, Qinjing Hu, Xue Zhao, Muhammad Ali, and Jefferson T. Banquando. "Orthogonal Numerical Analysis of Deformation and Failure Characteristics of Deep Roadway in Coal Mines: A Case Study." Minerals 12, no. 2 (2022): 185. http://dx.doi.org/10.3390/min12020185.

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With the development of deep, underground coal mines in China, the failure mechanism of the rocks surrounding roadways is becoming increasingly complicated and the deformational control is also significantly difficult. In this study, based on the temporal and spatial deformational distribution of the deep roadway area in the 2233 working face of Fuxin Hengda Coal Mine, factors affecting the deformation and failure mechanism of deep-buried roadways, such as cohesion (c), tensile strength (σt), internal friction angle (φ), vertical ground stress (p), and the horizontal-to-vertical stress ratio (
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49

Bhadwal, Sourav, and Manish Kumar. "Assessing Urban Green Infrastructure Transformation in Delhi (1991–2021): A Landscape Ecology and Remote Sensing Approach." Asian Journal of Geographical Research 8, no. 3 (2025): 1–22. https://doi.org/10.9734/ajgr/2025/v8i3272.

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Urban green spaces (UGS) play a crucial role in ensuring ecological stability and improving the quality of life in rapidly urbanizing regions. This study investigates the long-term transformation of UGS in the National Capital Territory of Delhi (NCTD), India, over a three decades (1991–2021), a time marked by unprecedented urban expansion. Multi-temporal Landsat satellite imagery was used for analysis, including Landsat 5 TM (1991, 2001), Landsat 8 OLI (2011), and Landsat 9 OLI-2 (2021). An unsupervised classification was carried out using the ISODATA clustering algorithm in ERDAS Imagine sof
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50

Sung, Su-Kyung, Eun-Seok Lee, and Byeong-Seok Shin. "Prevention of Mountain Disasters and Maintenance of Residential Area through Real-Time Terrain Rendering." Sustainability 13, no. 5 (2021): 2950. http://dx.doi.org/10.3390/su13052950.

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Climate change increases the frequency of localized heavy rains and typhoons. As a result, mountain disasters, such as landslides and earthworks, continue to occur, causing damage to roads and residential areas downstream. Moreover, large-scale civil engineering works, including dam construction, cause rapid changes in the terrain, which harm the stability of residential areas. Disasters, such as landslides and earthenware, occur extensively, and there are limitations in the field of investigation; thus, there are many studies being conducted to model terrain geometrically and to observe chang
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