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Unbound Medicine.
(vortex)
9,506 results
  • Trapping of swimmers in a vortex lattice. [Journal Article]
    Chaos. 2020 Jun; 30(6):063121.Berman SA, Mitchell KA
  • We examine the motion of rigid, ellipsoidal swimmers subjected to a steady vortex flow in two dimensions. Numerical simulations of swimmers in a spatially periodic array of vortices reveal a range of possible behaviors, including trapping inside a single vortex and motility-induced diffusion across many vortices. While the trapping probability vanishes at a sufficiently high swimming speed, we fi…
  • Reanalysis comparisons of upper tropospheric/lower stratospheric jets and multiple tropopauses. [Journal Article]
    Atmos Chem Phys. 2017 Sep 30; 17(18):11541-11566.Manney GL, Hegglin MI, … Daffer WH
  • The representation of upper tropospheric/lower stratospheric (UTLS) jet and tropopause characteristics is compared in five modern high-resolution reanalyses for 1980 through 2014. Climatologies of upper tropospheric jet, subvortex jet (the lowermost part of the stratospheric vortex), and multiple tropopause frequency distributions in MERRA (Modern Era Retrospective Analysis for Research and Appli…
  • Diastolic Vortex Alterations with Reducing Left Ventricular Volume: An in Vitro Study. [Journal Article]
    J Biomech Eng. 2020 Jun 30 [Online ahead of print]Samaee M, Nelsen N, … Santhanakrishnan A
  • Despite the large number of studies of intraventricular filling dynamics for potential clinical applications, little is known as to how the diastolic vortex ring properties are altered with reduction in internal volume of the cardiac left ventricle (LV). The latter is of particular importance in LV diastolic dysfunction and in congenital diseases such as hypertrophic cardiomyopathy (HCM), where L…
  • The Hydrodynamics of Jellyfish Swimming. [Journal Article]
    Ann Rev Mar Sci. 2020 Jun 29 [Online ahead of print]Costello JH, Colin SP, … Sutherland KR
  • Jellyfish have provided insight into important components of animal propulsion, such as suction thrust, passive energy recapture, vortex wall effects, and the rotational mechanics of turning. These traits are critically important to jellyfish because they must propel themselves despite severe limitations on force production imposed by rudimentary cnidarian muscular structures. Consequently, jelly…
  • Replication of left ventricular haemodynamics with a simple planar mitral valve model. [Journal Article]
    Biomed Tech (Berl). 2020 Jun 29 [Online ahead of print]Daub A, Kriegseis J, Frohnapfel B
  • Tools for the numerical prediction of haemodynamics in multi-disciplinary integrated heart simulations have to be based on computational models that can be solved with low computational effort and still provide physiological flow characteristics. In this context the mitral valve model is important since it strongly influences the flow kinematics, especially during the diastolic phase. In contrast…
  • The speed of FtsZ treadmilling is tightly regulated by membrane binding. [Journal Article]
    Sci Rep. 2020 Jun 26; 10(1):10447.García-Soriano DA, Heermann T, … Schwille P
  • As one of the key elements in bacterial cell division, the cytoskeletal protein FtsZ appears to be highly involved in circumferential treadmilling along the inner membrane, yielding circular vortices when transferred to flat membranes. However, it remains unclear how a membrane-targeted protein can produce these dynamics. Here, we dissect the roles of membrane binding, GTPase activity, and the un…
  • Impact of excipient choice on the aerodynamic performance of inhalable spray-freeze-dried powders. [Journal Article]
    Int J Pharm. 2020 Jun 23 [Online ahead of print]Wanning S, Süverkrüp R, Lamprecht A
  • Spray-freeze-drying (SFD) is a process in which a solution is dispersed into a freezing medium and dried by sublimation, resulting in lyophilized powders with spherical particles. This study aims at screening and evaluating the impact of the excipient choice and spray solution characteristics in SFD on the physico-chemical characteristics of lyospheres and rate their suitability for producing pul…
  • Inbreeding depression in one of the last DFTD-free wild populations of Tasmanian devils. [Journal Article]
    PeerJ. 2020; 8:e9220.Gooley RM, Hogg CJ, … Grueber CE
  • Vulnerable species experiencing inbreeding depression are prone to localised extinctions because of their reduced fitness. For Tasmanian devils, the rapid spread of devil facial tumour disease (DFTD) has led to population declines and fragmentation across the species' range. Here we show that one of the few remaining DFTD-free populations of Tasmanian devils is experiencing inbreeding depression.…
  • Little-Parks effect governed by magnetic nanostructures with out-of-plane magnetization. [Journal Article]
    Sci Rep. 2020 Jun 25; 10(1):10370.de Ory MC, Rollano V, … Vicent JL
  • Little-Parks effect names the oscillations in the superconducting critical temperature as a function of the magnetic field. This effect is related to the geometry of the sample. In this work, we show that this effect can be enhanced and manipulated by the inclusion of magnetic nanostructures with perpendicular magnetization. These magnetic nanodots generate stray fields with enough strength to pr…
  • A novel cylindrical overlap-and-fling mechanism used by sea butterflies. [Journal Article]
    J Exp Biol. 2020 Jun 25 [Online ahead of print]Karakas F, Maas AE, Murphy DW
  • The clap-and-fling mechanism is a well-studied, unsteady lift generation mechanism widely used by flying insects and is considered obligatory for tiny insects flying at low to intermediate Re However, some aquatic zooplankters including some pteropod (i.e. sea butterfly) and heteropod species swimming at low to intermediate Re also use the clap-and-fling mechanism. These marine snails have extrem…
  • Application of microfluidic technology in food processing. [Review]
    Food Funct. 2020 Jun 25 [Online ahead of print]He S, Joseph N, … Raston CL
  • Microfluidic technology is interdisciplinary with a diversity of applications including in food processing. The rapidly growing global population demands more advanced technologies in food processing to produce more functional and safer food, and for such processing microfluidic devices are a popular choice. This review critically critiques the state-of-the-art designs of microfluidic devices and…
  • Transfer of orbital angular momentum of light to plasmonic excitations in metamaterials. [Journal Article]
    Sci Adv. 2020 Jun; 6(24):eaay1977.Arikawa T, Hiraoka T, … Tanaka K
  • The emergence of the vortex beam with orbital angular momentum (OAM) has provided intriguing possibilities to induce optical transitions beyond the framework of the electric dipole interaction. The uniqueness stems from the OAM transfer from light to material, as demonstrated in electronic transitions in atomic systems. In this study, we report on the OAM transfer to electrons in solid-state syst…
  • Vortex phases and glassy dynamics in the highly anisotropic superconductor HgBa2CuO4+δ. [Journal Article]
    Sci Rep. 2020 Jun 24; 10(1):10239.Eley S, Willa R, … Civale L
  • We present an extensive study of vortex dynamics in a high-quality single crystal of HgBa2CuO4+δ, a highly anisotropic superconductor that is a model system for studying the effects of anisotropy. From magnetization M measurements over a wide range of temperatures T and fields H, we construct a detailed vortex phase diagram. We find that the temperature-dependent vortex penetration field Hp(T), s…
  • Vortex 4.0 on chip. [News]
    Light Sci Appl. 2020; 9:103.Zhang Q, Ni J, Qiu CW
  • The orbital angular momentum (OAM) of light has promising applications, ranging from information multiplexing andhigh-speed optical communication to computation. Dynamically tunable and switchable vortex microlasers combinedwith direct photocurrent detection of the topological charges of OAM states have paved unexplored routes for thedevelopment and integration of fourth-generation (4.0) vortex t…
  • Multi-domain structures in spheroidal Co nanoparticles. [Journal Article]
    Sci Rep. 2020 Jun 23; 10(1):10173.Usov NA, Nesmeyanov MS
  • The structure of multi-domain micromagnetic states in hcp cobalt nanoparticles of spheroidal shape has been studied using numerical simulation in the range of diameters 20-200 nm. The single-domain diameters of the particles are determined depending on their aspect ratio. The complicated vortex structure of domain walls for two- and three-domain micromagnetic configurations is investigated. It ha…
  • Positive-negative tunable liquid crystal lenses based on a microstructured transmission line. [Journal Article]
    Sci Rep. 2020 Jun 23; 10(1):10153.Algorri JF, Morawiak P, … López-Higuera JM
  • In this work, a novel technique to create positive-negative tunable liquid crystal lenses is proposed and experimentally demonstrated. This structure is based on two main elements, a transmission line acting as a voltage divider and concentric electrodes that distribute the voltage homogeneously across the active area. This proposal avoids all disadvantages of previous techniques, involving much …
  • Topological thermalization via vortex formation in ultrafast quenches. [Journal Article]
    Phys Rev E. 2020 May; 101(5-1):052113.Tello-Fraile M, Cano A, Donaire M
  • We investigate the thermalization of a two-component scalar field across a second-order phase transition under extremely fast quenches. We find that vortices start developing once the thermal bath sets the control parameter to its final value in the nonsymmetric phase. Specifically, we find that vortices emerge as the fluctuating field relaxes and departs macroscopically from its symmetric config…
  • Semi-Lagrangian lattice Boltzmann method for compressible flows. [Journal Article]
    Phys Rev E. 2020 May; 101(5-1):053306.Wilde D, Krämer A, … Foysi H
  • This work thoroughly investigates a semi-Lagrangian lattice Boltzmann (SLLBM) solver for compressible flows. In contrast to other LBM for compressible flows, the vertices are organized in cells, and interpolation polynomials up to fourth order are used to attain the off-vertex distribution function values. Differing from the recently introduced Particles on Demand (PoD) method [Dorschner, Bösch, …
  • Mapping the near-field spin angular momenta in the structured surface plasmon polariton field. [Journal Article]
    Nanoscale. 2020 Jul 02; 12(25):13674-13679.Li CC, Shi P, … Yuan XC
  • Optical spin angular momenta in a confined electromagnetic field exhibit a remarkable difference with their free space counterparts; in particular, the optical transverse spin that is locked with the energy propagating direction lays the foundation for many intriguing physical effects such as unidirectional transportation, quantum spin Hall effects, photonic Skyrmions, etc. In order to investigat…
  • Immobilized atmospheric particulate matter on leaves of 96 urban plant species. [Journal Article]
    Environ Sci Pollut Res Int. 2020 Jun 23 [Online ahead of print]Muhammad S, Wuyts K, Samson R
  • Plants provide many ecosystem services in urban environments, including improving ambient air quality. Leaves of plants permit the deposition of particulate matter (PM) and, depending on their leaf traits, PM may be immobilized within the epicuticular wax (EW) layer, on trichomes, on hyphae of fungi, or inside stomatal cavities. In this study, leaves of 96 perennial urban plant species consisting…
  • Acoustic trapping of microbubbles in complex environments and controlled payload release. [Journal Article]
    Proc Natl Acad Sci U S A. 2020 Jun 22 [Online ahead of print]Baresch D, Garbin V
  • Contactless manipulation of microparticles using acoustic waves holds promise for applications ranging from cell sorting to three-dimensional (3D) printing and tissue engineering. However, the unique potential of acoustic trapping to be applied in biomedical settings remains largely untapped. In particular, the main advantage of acoustic trapping over optical trapping, namely the ability of sound…
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