Results 21 to 30 of about 1,768 (208)
Intraductal Tissue Sampling Device Designed for the Biliary Tract
IEEE Journal of Translational Engineering in Health and Medicine, 2021 Clinical sampling of tissue that is read by a pathologist is currently the gold standard for making a disease diagnosis, but the few minimally invasive techniques available for small duct biopsies have low sensitivity, increasing the likelihood of false ...
Malay S. Patel +3 more
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FEATURES OF CALCULATION OF UNEVEN SWELLING SCREW PILES OF OIL AND GAS PIPELINES IN FROZEN GROUND
Вестник СибАДИ, 2017 The article is devoted to the problem of buckling of helical piles and deformation of the superstructure of oil and gas pipelines under the action of forces of frost heaving of soils.
V. N. Kuznetsova, M. V. Oryol
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Helical buckling in columnar assemblies of soft discotic mesogens [PDF]
Physical Review E, 2015 We investigate the emergence of chiral meso-structures in one-dimensional fluids consisting of stacked discotic particles and demonstrate that helical undulations are generated spontaneously from internal elastic stresses. The stability of these helical conformations arises from an interplay between long-ranged soft repulsions and nanopore confinement ...
Morales-Anda, L., Wensink, H. H.
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Erosion Factor Analysis of Coiled Tubing with Helical Buckling
Shiyou jixie, 2023 During coiled tubing(CT)operations,a wide annulus between CT and casing may lead to helical buckling and serious erosion of the CT inner wall.The inner wall erosion of CT with helical buckling was investigated through physical experiment and numerical ...
Cao Yinping +4 more
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Materials & Design, 2022 This study designs a series of helically oriented tubular structures inspired by Bouligand-type natural materials to optimize their mechanical performance.
Cheng-Che Tung +3 more
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BuildingsTo address the issue of local buckling in thin-walled steel tube concrete columns, a form of helical stiffening ribs was proposed. Axial compression tests were conducted on five sections of square steel tube concrete column specimens.
Penggang Tian +5 more
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A Closed-Form Buckling Formula for Open-Coiled and Properly Supported Circular-Bar Helical Springs
Journal of Mechanical Engineering, 2018 As a continuation of the author’s previous studies on the buckling analysis of helical springs, a closed-form formula having been obtained with the help of the artificial neural network (ANN) is proposed and discussed in detail for the first time for a ...
Vebil Yildirim
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Nucleation of Multiple Buckled Structures in Intertwined DNA Double Helices [PDF]
Physical Review Letters, 2017 We study the statistical-mechanical properties of intertwined double-helical DNAs (DNA braids). In magnetic tweezers experiments we find that torsionally-stressed stretched braids supercoil via an abrupt buckling transition, which is associated with nucleation of a braid end loop, and that the buckled braid is characterized by proliferation of multiple
Brahmachari, Sumitabha +4 more
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Frontiers in Physiology, 2014 The transformation of the straight embryonic heart tube into a helically wound loop is named cardiac looping. Such looping is regarded as an essential process in cardiac morphogenesis since it brings the building blocks of the developing heart into an ...
Jörg eMänner, Meric eBayraktar
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Advanced Functional Materials, EarlyView.A gradient‐engineered all‐paper sensor is fabricated by integrating MXene and in situ grown AgNPs within hierarchical cellulose networks. The device breaks the sensitivity–detection range trade‐off through cascaded conductive pathways, enabling ultrahigh pressure sensitivity, humidity–pressure decoupled dual‐mode sensing, and outstanding EMI shielding,
Ao Li +7 more
wiley +1 more source