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Journal articles on the topic 'Local void'

Author: Grafiati

Published: 24 June 2021

Last updated: 29 July 2025

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1

Lindner, U., K. J. Fricke, J. Einasto, and M. Einasto. "Void Hierarchy in the Northern Local Void." Symposium - International Astronomical Union 183 (1999): 185–90. http://dx.doi.org/10.1017/s0074180900132516.

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Empirical studies of the Large–Scale Structure in the nearby Universe come in two complementary modes, namely the investigation of either the distribution of luminous matter or voids: (i) The description of the galaxy and cluster distribution employs correlation functions, clustering analysis, topological methods, et cetera. (ii) The investigation of the empty regions between systems of galaxies uses void probability functions, mean diameters of voids, the compilation of void catalogues, and so forth.

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2

Tully, R. Brent. "The Local Void is Really Empty." Proceedings of the International Astronomical Union 3, S244 (2007): 146–51. http://dx.doi.org/10.1017/s1743921307013932.

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AbstractAre voids in the distribution of galaxies only places with reduced matter density and low star formation efficiency or are they empty of matter? There is now compelling evidence of expansion away from the Local Void at very high velocities. The motion is most reasonably interpreted as an evacuation of the void, which requires that the void be very large and very empty.

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3

Curtis, Olivia, Bryanne McDonough, and Tereasa G. Brainerd. "Properties of Voids and Void Galaxies in the TNG300 Simulation." Astrophysical Journal 962, no. 1 (2024): 58. http://dx.doi.org/10.3847/1538-4357/ad18b4.

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Abstract We investigate the properties of voids and void galaxies in the TNG300 simulation. Using a luminous galaxy catalog and a spherical void-finding algorithm, we identify 5078 voids at redshift z = 0. The voids cover 83% of the simulation volume and have a median radius of 4.4 h −1 Mpc. We identify two populations of field galaxies based on whether the galaxies reside within a void (“void galaxies”; 75,220 objects) or outside a void (“nonvoid galaxies”; 527,454 objects). Within the voids, mass does not directly trace light. Instead, the mean radial underdensity profile as defined by the l

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4

Pustilnik, Simon A., Dmitri I. Makarov, and Arina L. Tepliakova. "Nearby void dwarf galaxies: recent results, the ongoing project and prospects." Proceedings of the International Astronomical Union 14, S344 (2018): 396–99. http://dx.doi.org/10.1017/s1743921318006713.

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AbstractProperties of dwarf galaxies formed and evolved in the lowest density environment remain largely unexplored and poorly understood. Especially this concerns the low-mass end (Mbar < 109M⊙). We overview the results of systematic study of a hundred void dwarfs from the nearby Lynx-Cancer void. We describe the ongoing project aiming to form Nearby Void galaxy sample (R < 25 Mpc) over the whole sky. 1354 objects with distances less than 25 Mpc fall within 25 voids delineated by 460 luminous galaxies/groups. The void major sizes range from 13 to 37 Mpc. 1088 of 1354 void galaxies resid

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Rizzi, Luca, R. Brent Tully, Edward J. Shaya, Ehsan Kourkchi, and Igor D. Karachentsev. "DRAINING THE LOCAL VOID." Astrophysical Journal 835, no. 1 (2017): 78. http://dx.doi.org/10.3847/1538-4357/835/1/78.

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6

Seehaus, Thorsten, Veniamin I. Morgenshtern, Fabian Hübner, Eberhard Bänsch, and Matthias H. Braun. "Novel Techniques for Void Filling in Glacier Elevation Change Data Sets." Remote Sensing 12, no. 23 (2020): 3917. http://dx.doi.org/10.3390/rs12233917.

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The increasing availability of digital elevation models (DEMs) facilitates the monitoring of glacier mass balances on local and regional scales. Geodetic glacier mass balances are obtained by differentiating DEMs. However, these computations are usually affected by voids in the derived elevation change data sets. Different approaches, using spatial statistics or interpolation techniques, were developed to account for these voids in glacier mass balance estimations. In this study, we apply novel void filling techniques, which are typically used for the reconstruction and retouche of images and

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Zhang, Qi, and Yongliang Lin. "Analysis of Failure Mode of Reinforced Embankments Overlying Voids Based on Discrete Method." Applied Sciences 13, no. 16 (2023): 9270. http://dx.doi.org/10.3390/app13169270.

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The mode of the reinforced embankment overlying voids was generated based on discrete element software. By changing the vertical distance H and the horizontal distance L, the influence of the void position on the bearing capacity characteristics, displacement field, stress field and its reinforcement deformation law of the reinforced embankment was analyzed when a local overload was applied. Numerical simulation results show that the vertical displacement of the geogrid is symmetrical around the center of the loading plate, and the transverse displacement of the geogrid shows a centrosymmetric

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8

Shao, Shuai, Yimin Wu, Helin Fu, Sheng Feng, and Jiawei Zhang. "Numerical Investigation of Longitudinal through Voids in Tunnel Secondary Lining Vaults and Steel Plate Strengthening." Materials 16, no. 12 (2023): 4248. http://dx.doi.org/10.3390/ma16124248.

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This study investigates the influence of longitudinal through voids on vault lining. Firstly, a loading test was carried out on a local void model, and the CDP model was used for numerical verification. It was found that the damage to the lining caused by a longitudinal through void was primarily located at the void boundary. On the basis of these findings, an overall model of the vault’s through void was established using the CDP model. The effects of the void on the circumferential stress, vertical deformation, axial force, and bending moment of the lining surface were analyzed, and the dama

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9

Bland-Hawthorn, J., and S. Sharma. "Void asymmetries in the cosmic web: a mechanism for bulk flows." Proceedings of the International Astronomical Union 11, S308 (2014): 561–70. http://dx.doi.org/10.1017/s1743921316010589.

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AbstractBulk flows of galaxies moving with respect to the cosmic microwave background are well established observationally and seen in the most recent ΛCDM simulations. With the aid of an idealised Gadget-2 simulation, we show that void asymmetries in the cosmic web can exacerbate local bulk flows of galaxies. The {\it Cosmicflows-2} survey, which has mapped in detail the 3D structure of the Local Universe, reveals that the Local Group resides in a “local sheet” of galaxies that borders a “local void” with a diameter of about 40 Mpc. The void is emptying out at a rate of 16 km s-1Mpc-1. In a c

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10

Wan, Ya-Ting, Jian-Li Shao, Guang-Ze Yu, Er-Fu Guo, Hua Shu, and Xiu-Guang Huang. "Evolution of Preset Void and Damage Characteristics in Aluminum during Shock Compression and Release." Nanomaterials 12, no. 11 (2022): 1853. http://dx.doi.org/10.3390/nano12111853.

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It is well known that initial defects play an essential role in the dynamic failure of materials. In practice, dynamic tension is often realized by release of compression waves. In this work, we consider void-included single-crystal aluminum and investigate the damage characteristics under different shock compression and release based on direct atomistic simulations. Elastic deformation, limited growth and closure of voids, and the typical spall and new nucleation of voids were all observed. In the case of elastic deformation, we observed the oscillatory change of void volume under multiple co

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11

Jones, M. K., M. F. Horstemeyer, and A. D. Belvin. "A Multiscale Analysis of Void Coalescence in Nickel." Journal of Engineering Materials and Technology 129, no. 1 (2006): 94–104. http://dx.doi.org/10.1115/1.2400265.

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An internal state variable void coalescence equation developed by Horstemeyer, Lathrop, Gokhale, and Dighe (2000, Theor. Appl. Fract. Mech., 33(1), pp. 31–47) that comprises void impingement and void sheet mechanisms is updated based on three-dimensional micromechanical simulations and novel experiments. This macroscale coalescence equation, developed originally from two-dimensional finite element simulations, was formulated to enhance void growth. In this study, three-dimensional micromechanical finite element simulations were employed using cylindrical and spherical void geometries in nickel

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12

Kurapati, Sushma, Renée C. Kraan-Korteweg, D. J. Pisano, et al. "H i galaxy signatures in the SARAO MeerKAT galactic plane survey – II. The Local Void and its substructure." Monthly Notices of the Royal Astronomical Society 528, no. 1 (2024): 542–57. http://dx.doi.org/10.1093/mnras/stad3823.

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ABSTRACT The Local Void is one of the nearest large voids, located at a distance of 23 Mpc. It lies largely behind the Galactic Bulge and is therefore extremely difficult to observe. We use H i 21 cm emission observations from the SARAO MeerKAT Galactic Plane Survey (SMGPS) to study the Local Void and its surroundings over the Galactic longitude range 329° &lt; ℓ &lt; 55°, Galactic latitude |b| &lt; 1.5°, and redshift cz &lt; 7500 $\rm km \, s^{-1}$. We have detected 291 galaxies to median rms sensitivity of 0.44 mJy per beam per 44 $\rm km \, s^{-1}$ channel. We find 17 galaxi

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13

Tikhonov, Anton V., and Anatoly A. Klypin. "Voids in the Local Volume: a Limit on Appearance of a Galaxy in a Dark Matter Halo." Proceedings of the International Astronomical Union 3, S244 (2007): 152–56. http://dx.doi.org/10.1017/s1743921307013944.

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AbstractCurrent explanation of the overabundance of dark matter subhalos in the Local Group (LG) indicates that there maybe a limit on mass of a halo, which can host a galaxy. This idea can be tested using voids in the distribution of galaxies: at some level small voids should not contain any (even dwarf) galaxies. We use observational samples complete to MB = −12 with distances less than 8 Mpc to construct the void function (VF): the distribution of sizes of voids empty of any galaxies. There are ~ 30 voids with sizes ranging from 1 to 5 Mpc. We then study the distribution of dark matter halo

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14

Lindner, Ulrich, Klaus J. Fricke, Jaan Einasto, and Maret Einasto. "The Distribution of BCDGs in Voids." Highlights of Astronomy 11, no. 1 (1998): 111–12. http://dx.doi.org/10.1017/s1539299600020128.

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Generally the density of the environment is important for the formation and evolution of galaxies: bright elliptical galaxies reside in the centers of galaxy clusters, whereas late type galaxies preferentially populate small groups, filaments or the outskirts of rich clusters of galaxies. Furthermore, fainter galaxies define smaller voids than bright galaxies. Our investigation of void catalogues in the Northern Local Void region shows that large voids are interlaced by systems of faint galaxies dividing them into smaller subvoids (Lindner et al., 1995). This void hierarchy is an important pro

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15

Eliasson, Sara, Mathilda Karlsson Hagnell, Per Wennhage, and Zuheir Barsoum. "An Experimentally Based Micromechanical Framework Exploring Effects of Void Shape on Macromechanical Properties." Materials 15, no. 12 (2022): 4361. http://dx.doi.org/10.3390/ma15124361.

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A micromechanical simulation approach in a Multi-Scale Modeling (MSM) framework with the ability to consider manufacturing defects is proposed. The study includes a case study where the framework is implemented exploring a cross-ply laminate. The proposed framework highlights the importance of correct input regarding micromechanical geometry and void characteristics. A Representative Volume Element (RVE) model is developed utilizing true micromechanical geometry extracted from micrographs. Voids, based on statistical experimental data, are implemented in the RVE model, and the effects on the f

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16

Franco, C., F. Avila, and A. Bernui. "The mystery of Local Cosmic Void." Cadernos de Astronomia 5, Especial (2024): 38–47. http://dx.doi.org/10.47456/cad.astro.v5nespecial.44878.

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O Modelo ΛCDM-plano (Λ é a constante cosmológica e CDM, cold dark matter) é o que melhor se ajusta aos dados observacionais atualmente. Ele se fundamenta no Princípio Cosmológico, que assume a homogeneidade e a isotropia estatísticas do universo em larga escala. Estudando as propriedades desta última no Universo Local (UL) por meio do catálogo ALFALFA (Arecibo Legacy Fast ALFA Survey) – um levantamento que cobre ∼ 7000 deg2 do céu e conta com 31502 fontes extragalácticas de HI, distribuídas no intervalo 0 < z < 0.06 e divididas entre os hemisférios Norte e Sul Galácticos – encontramos re

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17

Lee, Kyo-Moon, Soo-Jeong Park, Tianyu Yu, Seong-Jae Park, and Yun-Hae Kim. "Experimental prediction of internal defects according to defect area on NDI via water absorption behavior." International Journal of Modern Physics B 35, no. 14n16 (2021): 2140021. http://dx.doi.org/10.1142/s021797922140021x.

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This study analyzed the relationship between the defect area identified through a C-scan and the void volume in CF-PEKK composite materials through the water absorption behavior to predict the void volume. The water absorption content varies with the defect area; however, the defect area identified through a C-scan and the water absorption content did not show a proportional relationship. This is because voids are distributed in the through-thickness. The results indicated that the absorption behavior could be used to predict the void volume. Irreversible absorption was found to be independent

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18

Lindner, U., K. J. Fricke, J. Einasto, and M. Einasto. "Faint Structures in Low Density Regions of the Nearby Universe." Symposium - International Astronomical Union 183 (1999): 256. http://dx.doi.org/10.1017/s0074180900132735.

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We present an investigation of the galaxy distribution in the huge underdense region between the Hercules, Coma and Local Superclusters, the so-called Northern Local Void (NLV), using void statistics (for details refer to Lindner et al. this Volume). Reshift data for galaxies and poor clusters of galaxies are available in low and high density regions as well. Samples of galaxies with different morphological type and various luminosity limits have been studied separately and void catalogues have been compiled from three different luminosity limited galaxy samples for the first time. Voids have

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19

Villata, M. "“Dark energy” in the Local Void." Astrophysics and Space Science 339, no. 1 (2012): 7–12. http://dx.doi.org/10.1007/s10509-012-0994-9.

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20

Moffat, J. W., and D. C. Tatarski. "Cosmological Observations in a Local Void." Astrophysical Journal 453 (November 1995): 17. http://dx.doi.org/10.1086/176365.

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21

Nasonova, O. G., and I. D. Karachentsev. "Kinematics of the Local cosmic void." Astrophysics 54, no. 1 (2011): 1–14. http://dx.doi.org/10.1007/s10511-011-9153-1.

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22

Banabic, Dorel, and Abdolvahed Kami. "Applications of the Gurson’s model in sheet metal forming." MATEC Web of Conferences 190 (2018): 01002. http://dx.doi.org/10.1051/matecconf/201819001002.

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Recent advances in the modelling of metals encompass modelling of metals structural inhomogeneity, damage, porosity, twinning/untwining and non-local and second order effects. This presentation is focused on modelling the void growth in ductile fractures. The growth and coalescence of microscopic voids are the main mechanisms in ductile fracture of bulk metallic parts. In sheet metals, ductile fracture is preceded by necking during which existing voids do not have significant growth. However, necking is highly sensitive to plastic flow direction which in turn is sensitive to the presence of vo

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23

Xiong, Rui, Wenyu Jiang, Fa Yang, Kehong Li, Bowen Guan, and Hua Zhao. "Investigation of Voids Characteristics in an Asphalt Mixture Exposed to Salt Erosion Based on CT Images." Materials 12, no. 22 (2019): 3774. http://dx.doi.org/10.3390/ma12223774.

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The performance of an asphalt mixture will deteriorate under the condition of salt erosion, but there are different opinions on the mechanism of deterioration. Few studies have focused on the relation between the change of void characteristics and performance deterioration of an asphalt mixture exposed to salt erosion. To explore the relation between the air voids characteristics of an asphalt mixture and mechanical damage under salt erosion, the mechanical damage in an asphalt mixture was measured by splitting strength. The asphalt mixture specimens, immersion solutions, asphalt mortar, and a

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Li, Haizhen, Xin Feng, and Ankui Hu. "Mechanical and Numerical Assessment of Localized Soil Voids Under PCCP Joints." Buildings 14, no. 11 (2024): 3624. http://dx.doi.org/10.3390/buildings14113624.

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Uniform support from the surrounding soil is important for maintaining the stable operation of buried pipelines. For segmented prestressed concrete cylinder pipe (PCCP), localized soil voids around the joint due to leakage or engineering activities make the pipe unsupported partially and threaten its integrity and strength. In this paper, the impact of a localized soil void on a pipe joint is qualitatively assessed using a beam-on-elastic-spring approximation model. It further provides quantitative analysis through a nonlinear finite element (FE) model of PCCPs and the surrounding soil. The de

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25

Lian, H. Y., G. Noghrehkar, A. M. C. Chan, and M. Kawaji. "Effect of Void Fraction on Vibrational Behavior of Tubes in Tube Bundle Under Two-Phase Cross Flow." Journal of Vibration and Acoustics 119, no. 3 (1997): 457–63. http://dx.doi.org/10.1115/1.2889745.

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The effects of local two-phase flow parameters on the vibrational behavior of tubes have been studied in an in-line 5 × 20 tube bundle subjected to air-water cross-flow. One of the tubes was flexibly mounted and instrumented for vibration measurement and the others were rigid. Parameters obtained include local void fraction fluctuations, RMS amplitude of void fraction fluctuations, void fraction distributions across the tube bundle, flow regimes based on probability density function of void fraction signals, damping ratio, and tube vibration response as a function of mass flux, void fraction a

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26

ANH, HO LE TUAN, and SHAO CHIN CINDY NG. "COSMOLOGICAL CONSTRAINTS ON THE LOCAL VOID WITH THE UNION SUPERNOVA COMPILATION." International Journal of Modern Physics A 24, no. 18n19 (2009): 3531–37. http://dx.doi.org/10.1142/s0217751x09047156.

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A simple inhomogeneous cosmological model with a local void is constrained with the latest Union supernova compilation. To fit the supernova data, a large local void on the scales of 1 Gpc is found, contrary to the small scales of 200 Mpc in the previous finding. A more realistic inhomogeneous cosmological model may be required to fit the supernova data. Alternatively, a clumpy universe with α < 1 can fit the supernova data with reduced local void scales.

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27

Guo, Yi, Chaitanya Paramatmuni, and Egemen Avcu. "Void Nucleation and Growth from Heterophases and the Exploitation of New Toughening Mechanisms in Metals." Crystals 13, no. 6 (2023): 860. http://dx.doi.org/10.3390/cryst13060860.

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Heterophases, such as precipitates, inclusions, second phases, or reinforcement particles, often drive void nucleation due to local incompatibilities in stresses/strains. This results in a significant life-limiting condition, as voids or their coalescence can lead to microcracks that reduce the ductility and fatigue life of engineering components. Continuum-mechanics-based analytical models have historically gained momentum due to their relative ease in predicting failure strain. The momentum of such treatment has far outpaced the development of theories at the atomic and micron scales, result

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Chen, Feng Yun, and Wei Min Liu. "Research on Measurement of Void Fraction for Vertically Rising Pipes by Optical Fiber Probe." Advanced Materials Research 361-363 (October 2011): 671–75. http://dx.doi.org/10.4028/www.scientific.net/amr.361-363.671.

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A way of measuring the average cross-sectional void fraction for vertically rising oil pipes by using closing valves quickly and optical fiber probe has been researched. Experiments were performed in oil-gas two-phase flow and the range of the average void fraction is 0.1～0.5. The relationship between average cross-sectional void fraction of a oil-gas two-phase flow and pipe’s center void fraction in vertically rising oil pipes, for different pipe diameters and varying oil flow, is obtained. An exponential model of average void fraction is also obtained with reference to Bankoff’s[1] variable

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29

Kukuryk, Marcin. "Experimental and FEM Analysis of Void Closure in the Hot Cogging Process of Tool Steel." Metals 9, no. 5 (2019): 538. http://dx.doi.org/10.3390/met9050538.

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In the present study, a new complex methodology for the analysis the closure of voids and a new forging system were developed and tested. The efficiency of the forging parameters and the effective geometric shapes of anvils to improve void closure were determined. A new cogging process provided a complete closure of an ingot’s axial defects, as confirmed by experimental tests. The evolution behavior of these defects with different sizes was investigated during the hot cogging process by means of the professional plastic forming software Deform-3D. A comprehensive procedure was developed using

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30

Tully, R. Brent, Daniel Pomarède, Romain Graziani, Hélène M. Courtois, Yehuda Hoffman, and Edward J. Shaya. "Cosmicflows-3: Cosmography of the Local Void." Astrophysical Journal 880, no. 1 (2019): 24. http://dx.doi.org/10.3847/1538-4357/ab2597.

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31

Tomita, K. "A local void and the accelerating Universe." Monthly Notices of the Royal Astronomical Society 326, no. 1 (2001): 287–92. http://dx.doi.org/10.1046/j.1365-8711.2001.04597.x.

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32

Xie, L., L. Gao, and Q. Guo. "The Local Void: for or against CDM?" Monthly Notices of the Royal Astronomical Society 441, no. 2 (2014): 933–38. http://dx.doi.org/10.1093/mnras/stu513.

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33

Park, M. H., Y. Tagusari, and N. Tsuji. "Characterization of local deformation and fracture behavior in ferrite + martensite dual-phase steels having different grain sizes." IOP Conference Series: Materials Science and Engineering 1249, no. 1 (2022): 012041. http://dx.doi.org/10.1088/1757-899x/1249/1/012041.

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Abstract Low carbon dual-phase (DP) steels composed of soft ferrite and hard martensite have been widely used in the automotive industry due to their good strength-ductility balance and large strain hardening ability. DP steels have a wide variation in mechanical properties depending on several microstructural features such as grain size, phase fraction and distribution. Among them, the grain refinement of DP steels is known to be an effective option for enhancing mechanical performance in strength and ductility (especially post-uniform elongation). However, the exact reason for the significan

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Ladani, Leila Jannesari, and Abhijit Dasgupta. "Effect of Voids on Thermomechanical Durability of Pb-Free BGA Solder Joints: Modeling and Simulation." Journal of Electronic Packaging 129, no. 3 (2006): 273–77. http://dx.doi.org/10.1115/1.2753911.

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The effect of process-induced voids on the durability of Sn–Pb and Pb-free solder interconnects in electronic products is not clearly understood. Experimental studies have provided conflicting ambiguous conclusions, showing that voids may sometimes be detrimental to reliability, but they may sometimes even increase the reliability of joints, depending on the size and location. Because of the higher level of process-induced voids in Pb-free solders, this debate is more intensified in Pb-free joints. This study presents finite element analysis (FEA) of the influence of void size, location, and s

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35

Sysyn, Mykola, Michal Przybylowicz, Olga Nabochenko, and Jianxing Liu. "Mechanism of Sleeper–Ballast Dynamic Impact and Residual Settlements Accumulation in Zones with Unsupported Sleepers." Sustainability 13, no. 14 (2021): 7740. http://dx.doi.org/10.3390/su13147740.

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Unsupported sleepers or void zones in ballasted tracks are one of the most recent and frequent track failures. The void failures have the property of intensive development that, without timely maintenance measures, can cause the appearance of cost-expensive local instabilities such as subgrade damages. The reason for the intensive void development lies in the mechanics of the sleeper and ballast bed interaction. The particularity of the interaction is a dynamic impact that occurs due to void closure. Additionally, void zones cause inhomogeneous ballast pressure distribution between the void zo

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Sauter, Anne I., and W. D. Nix. "A study of stress-driven diffusive growth of voids in encapsulated interconnect lines." Journal of Materials Research 7, no. 5 (1992): 1133–43. http://dx.doi.org/10.1557/jmr.1992.1133.

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Stress-driven diffusive growth of voids in encapsulated interconnect lines is studied. By calculating the rate of growth of a single void in a passivated line subjected to an initial hydrostatic tension stress and by assuming that failure occurs when the void reaches a critical size, a model for failure of encapsulated interconnect lines by stress voiding can be developed. The model for the prediction of void growth and failure is based on two limiting kinds of void growth. In one limit, which applies at short times, radial displacements occur by diffusional flow processes around the growing v

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Xiao, Xiu, Qingzi Zhu, Shao-Wen Chen, Mamoru Ishii, Yajun Zhang, and Haijun Jia. "Experimental Study on Interfacial Area Transport of Two-Phase Flow under Vibration Conditions." Science and Technology of Nuclear Installations 2017 (2017): 1–13. http://dx.doi.org/10.1155/2017/5809541.

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An experimental study on air-water two-phase flow under vibration condition has been conducted using double-sensor conductivity probe. The test section is an annular geometry with hydraulic diameter of 19.1 mm. The vibration frequency ranges from 0.47 Hz to 2.47 Hz. Local measurements of void fraction, interfacial area concentration (IAC), and Sauter mean diameter have been performed along one radius in the vibration direction. The result shows that local parameters fluctuate continuously around the base values in the vibration cycle. Additional bubble force due to inertia is used to explain l

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Sukhumkitcharoen, Rawiwan, Junichi Koseki, Hiroyuki Kyokawa, and Masahide Otsubo. "Liquefaction behaviour of aluminium and plastic rod assemblies using bi-axial apparatus with application of image analysis." E3S Web of Conferences 544 (2024): 10002. http://dx.doi.org/10.1051/e3sconf/202454410002.

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It has recently been shown that the overall deformation characteristics of granular materials during liquefaction seems to be governed by local void ratio characteristics. The aim of this study is to investigate the relationship between mechanical properties and local void ratio changes during liquefaction in two materials of different weights (aluminium-type and plastic-type rod assemblies). A series of constant-volume cyclic bi-axial loading tests was conducted together with the image analysis obtaining local void behaviour. The experimental results demonstrate that the first liquefaction re

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Sysyn, Mykola, Olga Nabochenko, and Vitalii Kovalchuk. "Experimental investigation of the dynamic behavior of railway track with sleeper voids." Railway Engineering Science 28, no. 3 (2020): 290–304. http://dx.doi.org/10.1007/s40534-020-00217-8.

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Abstract The deterioration of the sleeper support on the ballasted track begins with the accumulation of sleeper voids. The increased dynamic loading in the voided zone and the ballast contact conditions cause the accelerated growth of the settlements in the voided zones, which results in the appearance of local instabilities like ballast breakdown, white spots, subgrade defects, etc. The recent detection and quantification of the sleeper voids with track-side and onboard monitoring can help to avoid or delay the development of local instabilities. The present paper is devoted to the study of

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40

Tully, R. Brent, Edward J. Shaya, Igor D. Karachentsev, et al. "Our Peculiar Motion Away from the Local Void." Astrophysical Journal 676, no. 1 (2008): 184–205. http://dx.doi.org/10.1086/527428.

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Teyssedou, A., A. Tapucu, and M. Lortie. "Impedance probe to measure local void fraction profiles." Review of Scientific Instruments 59, no. 4 (1988): 631–38. http://dx.doi.org/10.1063/1.1139847.

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Umminger, Klaus, Simon Schollenberger, Lars Dennhardt, Holger Schmidt, Oliver Herbst, and Ingo Ganzmann. "Development of procedures for local void fraction measurements." Nuclear Engineering and Design 336 (September 2018): 163–70. http://dx.doi.org/10.1016/j.nucengdes.2018.05.014.

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Fan, Xunli, and Feifei Du. "An Efficient Bypassing Void Routing Algorithm for Wireless Sensor Network." Journal of Sensors 2015 (2015): 1–9. http://dx.doi.org/10.1155/2015/686809.

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Since the sensor node’s distribution in a wireless sensor network (WSN) is irregular, geographic routing protocols using the greedy algorithm can cause local minima problem. This problem may fail due to routing voids and lead to failure of data transmission. Based on the virtual coordinate mapping, this paper proposes an efficient bypassing void routing protocol to solve the control packet overhead and transmission delay in routing void of WSN, which is called EBVRPVCM. The basic idea is to transfer the random structure of void edge to a regular one through mapping the coordinates on a virtual

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Chang, Ching-Ray, and Jyh-Shinn Yang. "Magnetization Configurations and Magnetization Reversal of Thin Submicron Permalloy Ellipses with Structural Defects." Journal of Nanoscience and Nanotechnology 8, no. 6 (2008): 2901–4. http://dx.doi.org/10.1166/jnn.2008.18316.

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We have studied the magnetic switching behavior of thin elliptical permalloy films with structural defects by micromagnetic simulations. The nonmagnetic void was found to tend to pin the adjacent magnetic moment, which alters the local equilibrium magnetization patterns and modifies the switching behavior of magnetization. In particular, for the case of voids close to the edge, the curling effect of voids is significant, and induces the occurrence of the multiple-stage modes of magnetization reversal, resulting in a high switching field.

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Ishikawa, Takashi, T. Ishiguro, N. Yukawa, H. Yoshida, and N. Fujita. "Experimental Approach for Investigation of Micro Void Behavior on Dual Phase Steel during Plastic Deformation." Key Engineering Materials 535-536 (January 2013): 393–96. http://dx.doi.org/10.4028/www.scientific.net/kem.535-536.393.

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In this research, micro void behavior of DPS, which has different phase volume fraction, is investigated experimentally. Prepared specimens have different amount of alloy element and heat treatment condition. Although both these specimens have almost the same strength and total elongation, these showed quite different local elongations, hole expanding ratio and bending ductility. In order to observe micro void behavior specimens, that have different strain levels, are prepared. These sectional areas are observed by laser microscope after cutting and polishing. The change ratio of micro void vo

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Sysyn, Mykola, Michal Przybylowicz, Olga Nabochenko, and Lei Kou. "Identification of Sleeper Support Conditions Using Mechanical Model Supported Data-Driven Approach." Sensors 21, no. 11 (2021): 3609. http://dx.doi.org/10.3390/s21113609.

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The ballasted track superstructure is characterized by a relative quick deterioration of track geometry due to ballast settlements and the accumulation of sleeper voids. The track zones with the sleeper voids differ from the geometrical irregularities with increased dynamic loading, high vibration, and unfavorable ballast-bed and sleeper contact conditions. This causes the accelerated growth of the inhomogeneous settlements, resulting in maintenance-expensive local instabilities that influence transportation reliability and availability. The recent identification and evaluation of the sleeper

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Mo̸rch, Knud A. "Cavitation Nuclei and Bubble Formation—A Dynamic Liquid-Solid Interface Problem." Journal of Fluids Engineering 122, no. 3 (2000): 494–98. http://dx.doi.org/10.1115/1.1287506.

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A model of the formation of cavitation nuclei is developed assuming local detachment of the liquid at locations of concave solid surface topography. The detachment is attributed to diffusion of gas molecules into the interfacial liquid, where the liquid-solid bonds are strained due to interfacial tension in the liquid. Calculations indicate that attached interfacial voids may grow into stabilized cavitation nuclei as a consequence of broad-band resonance, excited by external sources of noise or vibration in the whole range of frequencies up to the MHz regime. The gas content in the liquid and

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Kreckel, Kathryn, Jacqueline H. van Gorkom, Burcu Beygu, et al. "The Void Galaxy Survey: Galaxy Evolution and Gas Accretion in Voids." Proceedings of the International Astronomical Union 11, S308 (2014): 591–99. http://dx.doi.org/10.1017/s1743921316010644.

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AbstractVoids represent a unique environment for the study of galaxy evolution, as the lower density environment is expected to result in shorter merger histories and slower evolution of galaxies. This provides an ideal opportunity to test theories of galaxy formation and evolution. Imaging of the neutral hydrogen, central in both driving and regulating star formation, directly traces the gas reservoir and can reveal interactions and signs of cold gas accretion. For a new Void Galaxy Survey (VGS), we have carefully selected a sample of 59 galaxies that reside in the deepest underdensities of g

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Alzahrani, Sara, Devendra Kumar Gorle, Andrew Qiu, and Ant Ural. "Effect of Voids on the Percolation Conductivity of Carbon Nanotube Networks." ECS Meeting Abstracts MA2024-01, no. 9 (2024): 921. http://dx.doi.org/10.1149/ma2024-019921mtgabs.

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Two-dimensional (2D) networks consisting of one-dimensional (1D) wires, such as carbon nanotubes, metal nanowires, and graphene nanoribbons, are promising candidates for next-generation flexible transparent conducting electrodes in devices such as organic light-emitting diodes (OLEDs), solar cells, touch screens, smart windows, transparent heaters, and liquid crystal displays. Nanotube networks also have broad application potential in flexible electronics, such as thin film transistors, wearables, electronic skin, and internet of things (IoT) sensors. The electrical conductivity of carbon nano

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Haslbauer, Moritz, Indranil Banik та Pavel Kroupa. "The KBC void and Hubble tension contradict ΛCDM on a Gpc scale − Milgromian dynamics as a possible solution". Monthly Notices of the Royal Astronomical Society 499, № 2 (2020): 2845–83. http://dx.doi.org/10.1093/mnras/staa2348.

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ABSTRACT The KBC void is a local underdensity with the observed relative density contrast δ ≡ 1 − ρ/ρ0 = 0.46 ± 0.06 between 40 and 300 Mpc around the Local Group. If mass is conserved in the Universe, such a void could explain the 5.3σ Hubble tension. However, the MXXL simulation shows that the KBC void causes 6.04σ tension with standard cosmology (ΛCDM). Combined with the Hubble tension, ΛCDM is ruled out at 7.09σ confidence. Consequently, the density and velocity distribution on Gpc scales suggest a long-range modification to gravity. In this context, we consider a cosmological MOND model s

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