Results 261 to 270 of about 45,963 (298)

Mechanically actuated frequency reconfigurable metamaterial absorber

Sensors and Actuators A: Physical, 2019
Abstract In this paper, a mechanically actuated frequency reconfigurable metamaterial electromagnetic absorber is proposed. The absorber’s metamaterial unit cell is designed to exploit LC resonance from inductive and capacitive coupling. Because this inductance and capacitance determine the absorber’s resonant frequency, we propose a mechanical ...
Jongyeong Kim, Heijun Jeong, Sungjoon Lim   +2 more
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A Mechanically Controlled Reconfigurable Reflective Metasurface

2020 Cross Strait Radio Science & Wireless Technology Conference (CSRSWTC), 2020
This paper proposes a reconfigurable metasurface to control the state of the reflected circularly polarized waves through mechanical rotation of different ring parts in the structure. At the working frequency of 5.8GHz, the reflected wave can be focused, scattered, or beam direction controlled. Through simulation, the performance of different functions
Yu Xia, Yi Wang, Qunsheng Cao
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Shape optimization in mechanically reconfigurable antennas

2013 IEEE Antennas and Propagation Society International Symposium (APSURSI), 2013
This paper describes the optimization methodology to mechanically reshape an antenna deformable reflector with a set of actuators in order to produce a desired contoured beam. The set of actuator commands for reshaping the reflector is determined by global optimization with Simulated Annealing.
Goncalo Rodrigues, Jean-Christophe Angevain, Julian Santiago-Prowald   +2 more
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Carton erection using reconfigurable folder mechanisms

Packaging Technology and Science, 2009
AbstractConsideration of the motions involved in erecting a range of carton types shows that the individual motions are essentially simple. It is the combination of them that gives the complexity that is often required. This suggests that it is possible to design mechanisms to generate the individual motions and then combine these, thus creating an ...
Dai, J,S, Medland, A, Mullineux, G
openaire   +1 more source

Toward mechanical proprioception in autonomously reconfigurable kirigami-inspired mechanical systems

Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences
Mechanical metamaterials have recently been exploited as an interesting platform for information storing, retrieval and processing, analogous to electronic devices. In this work, we describe the design and fabrication a two-dimensional (2D) multistable metamaterial consisting of building blocks that can be switched between two distinct stable phases ...
Weijian Jiao, Hang Shu, Qiguang He, Jordan R. Raney   +3 more
openaire   +2 more sources

Systematization of morphing in reconfigurable mechanisms

Mechanism and Machine Theory, 2016
Abstract This paper addresses metamorphic and reconfigurable mechanisms based on types of morphing and ways of achieving it through a comprehensive review and a classification of mechanisms in the literature while considering various types of morphing.
Aimedee, F., Gogu, G., Dai, J. S., Bouzgarrou, C., Bouton, N.   +4 more
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Retraction of “Mechanical Reconfiguration of Stereoisomers”

Journal of the American Chemical Society, 2015
Poly(methyl acrylate) of varying molecular weight was grown from the enantiopure ditopic initiator (R)- or (S)-1,1′-binaphthyl-2,2′-bis-(2-bromoisobutyrate). Subjecting CH3CN solutions of high-molecular-weight derivatives (MN > 25 kDa) to sonication at 0 °C resulted in >95% racemization after 24 h, as determined by circular dichroism; no appreciable ...
Kelly M. Wiggins, Todd W. Hudnall, Qilong Shen, Matthew J. Kryger, Jeffrey S. Moore, Christopher W. Bielawski   +5 more
openaire   +1 more source

Non-mechanical reconfigurable zoom metalenses

Active Photonic Platforms 2022, 2022
Fan Yang, Hung-I Lin, Mikhail Shalaginov, Katherine Stoll, Sensong An, Clara Rivero-Baleine, Myungkoo Kang, Anuradha M. Agarwal, Kathleen Richardson, Hualiang Zhang, Juejun Hu, Tian Gu   +11 more
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Reconfiguration Mechanism for Holonic Manufacturing Systems

IFAC Proceedings Volumes, 2008
Abstract Although holonic manufacturing systems (HMS) have been recognized as a paradigm to cope with changes in manufacturing environment based on a flexible architecture, several characteristics of HMS such as re-configurability have not been characterized quantitatively.
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Single Motor-Controlled Mechanically Reconfigurable Reflectarray

IEEE Transactions on Antennas and Propagation, 2023
Zhongyao Cao, Yue Li, Zhijun Zhang, Magdy F. Iskander   +3 more
openaire   +1 more source