Results 181 to 190 of about 7,601,055 (365)

The Topological Complexity of a Surface

, 2015
Let $p$ be a branched covering of a Riemann surface to the Riemann sphere $\mathbb{P}^1$, with branching set $B \subset \mathbb{P}^1$. We define the complexity of $p$ as infinity, if $\mathbb{P}^1 \setminus B$ does not admit a hyperbolic structure, or the product of its degree and the hyperbolic area of $\mathbb{P}^1 \setminus B$, otherwise.
openaire   +2 more sources

Reconfigurable 3D Magnetic Nanoarchitectures

Advanced Functional Materials, EarlyView.
This experimental study confirms that 3D magnetic tetrapods grown by focused electron beam‐induced deposition exhibit sequential, controllable magnetization reversal in the individual nanowire legs. The magnetic state of the nanoarchitecture can be controlled individually, on‐demand, through a variation of the direction and magnitude of the applied ...
Sabri Koraltan, Fabrizio Porrati, Robert Kraft, Sven Barth, Markus Weigand, Claas Abert, Dieter Suess, Michael Huth, Sebastian Wintz   +8 more
wiley   +1 more source

Reconfigurable Metamirrors Based on Compliant Mechanisms

Advanced Functional Materials, EarlyView.
Providing the basis for numerous practical applications, the reconfigurability of metadevices is of great importance. Through the integration of controlled mechanical deformation with chiral meta‐atoms, a compliant mechanism based metamirror is demonstrated for active control over the polarization of electromagnetic waves.
Galestan Mackertich‐Sengerdy, Lei Kang, Sawyer D. Campbell, Douglas H. Werner   +3 more
wiley   +1 more source

Design Considerations of a New IPM Rotor With Efficient Utilization of PMs Enabled by Additive Manufacturing

IEEE Access
This paper presents a new design concept for interior permanent magnet (IPM) rotor using the capabilities of additive manufacturing (AM). In conventional laminated IPM topology, the presence of rotor ribs is essential for maintaining the mechanical ...
Akbar Mohammadi Ajamloo, Mohamed N. Ibrahim, Peter Sergeant   +2 more
doaj   +1 more source

Programmable Entanglement of Granular Mechanical Metamaterials

Advanced Functional Materials, EarlyView.
This paper introduces entangled granular metamaterials—clusters of complex grains whose interlocking drives emergent, tunable properties. Here, we identify geometric features that enable entanglement and quantify them via disentanglement dynamics. We demonstrate robotic handling where magnetically controlled grains achieve robust collective picking and
Ashkan Rezanejad, Mostafa Mousa, Christian D. Lorenz, Matthew Howard, Antonio Elia Forte   +4 more
wiley   +1 more source

Analysis of Tooth Surface Error of Topology Modification Gear

Jixie chuandong, 2017
When gear topology modification using the forming method grinding,the tooth profile modification is achieved by trimming the wheel truncation,while the tooth modification is achieved by adding an additional movement of the wheel or gear.
Wang Zhonghou, Liu Shaokun, Liu Xinrong, Zhang Liming   +3 more
doaj  

Comparison of the Fermi-surface topologies of -(BEDT-TTF)₂Cu(NCS)₂and its deuterated analogue [PDF]

, 2003
R. S. Edwards, A. Narduzzo, John Singleton, Arzhang Ardavan, J.A. Schlueter   +4 more
openalex   +1 more source

When superhydrophobic coatings are icephobic: Role of surface topology

Surface & Coatings Technology, 2019
Xinghua Wu, V. Silberschmidt, Zhong-ting Hu, Zhong Chen   +3 more
semanticscholar   +1 more source

Emergent Spin‐Glass Behavior in an Iron(II)‐Based Metal–Organic Framework Glass

Advanced Functional Materials, EarlyView.
A one‐pot, solvent‐free synthesis yields an Fe2+‐based metal‐organic framework (MOF) glass featuring a continuous random network structure. The material exhibits spin‐glass freezing at 14 K, driven by topological‐disorder and short‐range magnetic frustration, showcasing the potential of MOF glasses as a plattform for cooperative magnetic phenomena in ...
Chinmoy Das, Soma Salamon, Joachim Landers, Jan‐Benedikt Weiß, Wen‐Long Xue, Pascal Kolodzeiski, Roman Pallach, Heiko Wende, Sebastian Henke   +8 more
wiley   +1 more source

Correlative ex situ and Liquid-Cell TEM Observation of Bacterial Cell Membrane Damage Induced by Rough Surface Topology. [PDF]

Int J Nanomedicine, 2020
Banner DJ, Firlar E, Jakubonis J, Baggia Y, Osborn JK, Shahbazian-Yassar R, Megaridis CM, Shokuhfar T.   +7 more
europepmc   +1 more source