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Quantum vortices get stretched

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Frontiers of physics 2024年第3期19卷 225-227页

作者： emanuel A.L.Henn São Carlos Institute of Physics University of São Paulo-PO Box 36913560-970São CarlosBrazil

Since its discovery, superfluidity [1,2] remains one of the most remarkable phenomena in quantum physics. The onset of the quantum regime in liquid helium is visually striking, when the fluid flows without dissipation or detaches from a rotating bucket, remaining still upon soft rotations. The same phenomenon is present in the context of ultracold bosonic quantum gases where, most of the time, superfluidity walks hand-in-hand with the transition to Bose−Einstein condensation [3].

关键词： quantum rotating rotation

Approximate contact solutions for non-axisymmetric homogeneous and power-law graded elastic bodies:A practical tool for design engineers and tribologists

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Friction 2024年第2期12卷 340-355页

作者： Valentin L.POPOV Qiang LI emanuel WILLERT Institute of Mechanics Technische Universität BerlinBerlin 10623Germany

In two recent papers,approximate solutions for compact non-axisymmetric contact problems of homogeneous and power-law graded elastic bodies have been suggested,which provide explicit analytical relations for the force–approach relation,the size and the shape of the contact area,as well as for the pressure distribution *** solutions were derived for profiles,which only slightly deviate from the axisymmetric *** the present paper,they undergo an extensive testing and validation by comparison of solutions with a great variety of profile shapes with numerical solutions obtained by the fast Fourier transform(FFT)-assisted boundary element method(BEM).Examples are given with quite significant deviations from axial symmetry and show surprisingly good agreement with numerical solutions.

关键词： normal contact non-axisymmetric indenter extremal principle generalized method of dimensionality reduction(mdR) functional elastic grading

Advancing oxygen separation:insights from experimental and computational analysis of La_(0.7)Ca_(0.3)Co_(0.3)Fe_(0.6)M_(0.1)O_(3-δ)(M=Cu,Zn)oxygen transport membranes

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Frontiers of Chemical Science and Engineering 2024年第6期18卷 17-29页

作者： Guoxing Chen Wenmei Liu Marc Widenmeyer Xiao Yu Zhijun Zhao Songhak Yoon Ruijuan Yan Wenjie Xie Armin Feldhoff Gert Homm emanuel Ionescu Maria Fyta Anke Weidenkaff Fraunhofer Research Institution for Materials Recycling and Resource Strategies IWKS Alzenau 63755Germany Electrochemistry Laboratory Paul Scherrer InstituteVilligen PSI 5232Switzerland Department of Materials and Earth Sciences Materials and ResourcesTechnical University of DarmstadtDarmstadt 64287Germany Institute of Physical Chemistry and Electrochemistry Leibniz University HannoverHannover 30167Germany Institute for Computational Physics University of StuttgartStuttgart 70569Germany Computational Biotechnology RWTH AachenAachen 52074Germany

In this study,perovskite-type La_(0.7)Ca_(0.3)Co_(0.3)Fe_(0.6)M_(0.1)O_(3-δ)(M=Cu,Zn)powders were synthesized using a scalable reverse co-precipitation method,presenting them as novel materials for oxygen transport *** comprehensive study covered various aspects including oxygen permeability,crystal structure,conductivity,morphology,CO_(2) tolerance,and long-term regenerative durability with a focus on phase structure and *** membrane La_(0.7)Ca_(0.3)Co_(0.3)Fe_(0.6)M_(0.1)O_(3-δ)exhibited high oxygen permeation fluxes,reaching up to 0.88 and 0.64 mL·min^(−1)·cm^(−2) under air/He and air/CO_(2) gradients at 1173 K,*** 1600 h of CO_(2) exposure,the perovskite structure remained intact,showcasing superior CO_(2) resistance.A combination of first principles simulations and experimental measurements was employed to deepen the understanding of Cu/Zn substitution effects on the structure,oxygen vacancy formation,and transport behavior of the *** findings underscore the potential of this highly CO_(2)-tolerant membrane for applications in high-temperature oxygen *** enhanced insights into the oxygen transport mechanism contribute to the advancement of next-generation membrane materials.

关键词： perovskite oxygen permeation membrane oxygennionsdiffusiono xygen vacancy formation energy energy barrier

Oral fluoroquinolones and the risk of Achilles tendon rupture

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Journal of Sport and Health Science 2024年第6期13卷 749-750页

作者： Peter Vibe Rasmussen Jarl emanuel Strange Anders Holt Department of Cardiology Herlev-Gentofte University HospitalCopenhagen 2730Denmark Department of Cardiology Bispebjerg-Frederiksberg University HospitalCopenhagen 2400Denmark Department of Cardiology Rigshospitalet University HospitalCopenhagen 2100Denmark

Dear editor,Fluoroquinolones(FQs)are a class of antibiotics used to treat bacterial infections,such as lower respiratory,gastrointestinal,and urinary tract *** to its broad-spectrum action and wide availability,it is ... 详细信息

关键词： prescribed spectrum action

A new perspective on intervertebral disc calcification—from bench to bedside

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Bone Research 2024年第1期12卷 50-61页

作者： emanuel J.Novais Rajkishen Narayanan Jose A.Canseco Koen van de Wetering Christopher K.Kepler Alan S.Hilibrand Alexander R.Vaccaro Makarand V.Risbud Department of Orthopaedic Surgery Sidney Kimmel Medical CollegeThomas Jefferson UniversityPhiladelphiaPAUSA Unidade Local de Saúde do Litoral Alentejano Orthopedic DepartmentSantiago do CacémPortugal Rothman Orthopedic Institute at Thomas Jefferson University PhiladelphiaPAUSA

Disc degeneration primarily contributes to chronic low back and neck ***,there is an urgent need to understand the spectrum of disc degeneration phenotypes such as fibrosis,ectopic calcification,herniation,or mixed *** these phenotypes,disc calcification is the least *** calcification,by definition,is the pathological mineralization of soft tissues,widely studied in the context of conditions that afflict vasculature,skin,and ***,disc calcification is associated with poor surgical outcomes and back pain refractory to conservative *** is frequently seen as a consequence of disc aging and progressive degeneration but exhibits unique molecular and morphological characteristics:hypertrophic chondrocyte-like cell differentiation;TNAP,ENPP1,and ANK upregulation;cell death;altered Pi and PPi homeostasis;and local *** studies in mouse models have provided a better understanding of the mechanisms underlying this *** is essential to recognize that the presentation and nature of mineralization differ between AF,NP,and EP ***,the combination of anatomic location,genetics,and environmental stressors,such as aging or trauma,govern the predisposition to ***,the systemic regulation of calcium and Pi metabolism is less important than the local activity of PPi modulated by the ANK-ENPP1 axis,along with disc cell death and differentiation *** there is limited understanding of this phenotype,understanding the molecular pathways governing local intervertebral disc calcification may lead to developing disease-modifying drugs and better clinical management of degeneration-related pathologies.

关键词： degeneration metabolism intervertebral

Patterns of Ips cembrae(Herr)infestation on trap and standing trees of European larch(Larix decidua Mill.)

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林业研究:英文版 2023年第6期34卷 2041-2050页

作者： Jakub Špoula emanuel Kula Faculty of Forestry and Wood Technology Department of Forest Protection and Wildlife ManagementMendel University in BrnoZemědělská3Brno 61300Czech Republic

The large larch beetle,Ips cembrae,is a significant pest causing the death of *** 2020,the attack density of *** on larch trap trees and standing trees was evaluated using sample sections placed along the *** a defensive measure against ***,trap trees were highly effective in both spring and *** attack density increased with increasing trap tree surface area/*** were established evenly throughout the entire trunk including the thin upper *** the number of trap trees was low and their capacity full,a continual aggregation of adults occurred due to pheromone communication,leading to attacks on healthy standing trees in the immediate *** was found that *** attacked standing trees from the trunk base,with a continual colonization of the stem up to 70%of the tree height in a time-differentiated progression of development *** attack density of *** on standing trees was up to 40%lower than on the trap trees.

关键词： Forest protection Ips cembrae Larix decidua Stem infestation Trap tree

Regulating autophagy:a novel role for SETX(Senataxin)

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Neural Regeneration Research 2021年第10期16卷 2008-2009页

作者： Patricia Richard emanuel Rosonina Stellate Therapeutics Inc. JLABS@NYCNew YorkUSA Department of Biology York UniversityTorontoCanada

Mutations in the gene encoding SETX,also known as Senataxin,are mainly linked to two distinct neurodegenerative diseases,a cerebellar ataxia known as oculomotor apraxia type 2(AOA2)and a form of juvenile amyotrophic l... 详细信息

关键词： al. diseases degenerative

Moving least-squares approximations for linearly-solvable stochastic optimal control problems

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控制理论与应用（英文版） 2011年第3期9卷 451-463页

作者： Mingyuan Zhong emanuel Todorov Department of Applied Mathematics University of Washington Seattle USA Department of Computer Science University of Washington Seattle USA

Nonlinear stochastic optimal control problems are fundamental in control theory.A general class of such problems can be reduced to computing the principal eigenfunction of a linear ***,we describe a new method for finding this eigenfunction using a moving least-squares function *** use efficient iterative solvers that do not require matrix factorization,thereby allowing us to handle large numbers of basis *** bases are evaluated at collocation states that change over iterations of the algorithm,so as to provide higher resolution at the regions of state space that are visited more *** shape of the bases is automatically defined given the collocation states,in a way that avoids gaps in the *** results on test problems are provided.

关键词： Stochastic optimal control Bellman equations

Delayed Teleoperation with Force Feedback of a Humanoid Robot

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International Journal of Automation and computing 2021年第4期18卷 605-618页

作者： Viviana Moya emanuel Slawinski Vicente Mut Institute of Automation National University of San JuanSan Martin 5400Argentina

Teleoperation systems allow the extension of human capabilities to remote-control devices by providing the operator with conditions similar to those at the remote site through a communication channel that sends information from one site to the other. This article aims to present an analysis of the benefits of force feedback applied to the bilateral teleoperation of a humanoid robot with timevarying delay. As a control scheme, we link adaptive inverse dynamics compensation, balance control, and P+d like controllers. Finally,a test is performed where an operator simultaneously handles the locomotion(forward velocity and turn angle) and arm of a simulated 3D humanoid robot to do a pick-and-place task using two master devices with force feedback, where indexes such as time to complete the task, coordination errors, path tracking error, and percentage of successful tests are reported for different time-delays. We conclude with the results achieved.

关键词： Humanoid robot bilateral teleoperation time delay force feedback walking manipulation