Results 91 to 100 of about 63,150 (264)

Toward Wireless Implantable Robotic Systems Driven by Magnetic Field for Personalized Therapy

Advanced Robotics Research, EarlyView.
Robotic materials are playing an increasingly vital role in enabling sensing and actuation at small scales. This perspective highlights recent advances in magnetic materials and magnetically actuated devices for wireless sensing, actuation, and energy harvesting toward implantable robotic systems for closed‐loop therapy.
Yusheng Wang, Ruijian Ge, Xiaoguang Dong
wiley   +1 more source

NASA Thesaurus Supplement: A three part cumulative supplement to the 1982 edition of the NASA Thesaurus (supplement 2) [PDF]

The three part cumulative NASA Thesaurus Supplement to the 1982 edition of the NASA Thesaurus includes: part 1, hierarchical listing; part 2, access vocabulary, and part 3, deletions. The semiannual supplement gives complete hierarchies for new terms and

core   +1 more source

Cosmological-parameter determination with microwave background maps [PDF]

, 1996
The angular power spectrum of the cosmic microwave background (CMB) contains information on virtually all cosmological parameters of interest, including the geometry of the Universe (Ω), the baryon density, the Hubble constant (h), the cosmological ...
Jungman, Gerard, Kamionkowski, Marc, Kosowsky, Arthur, Spergel, David N.   +3 more
core  

Mass coupling and $Q^{-1} of impurity-limited normal $^3$He in a torsion pendulum

, 2010
We present results of the $Q^{-1}$ and period shift, $\Delta P$, for $^3$He confined in a 98% nominal open aerogel on a torsion pendulum. The aerogel is compressed uniaxially by 10% along a direction aligned to the torsion pendulum axis and was grown ...
A. D. Fefferman, A.I. Golov, D. Einzel, D. Einzel, E. Nazaretski, G. Morley, J. Elbs, J. M. Parpia, J. Pollanen, J. Pollanen, J.M. Parpia, J.M. Parpia, J.M. Parpia, J.M. Parpia, J.P. Davis, J.V. Porto, K. Aoyama, K. Y. Fang, M. Bagley, N. Zhelev, P. Sharma, P. Venkataramani, R. Blaauwgeers, R. G. Bennett, R. Nomura, S. Higashitani, T. Sato, V.V. Dmitriev, V.V. Dmitriev, W. P. Halperin   +29 more
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Compliant Pneumatic Feet with Real‐Time Stiffness Adaptation for Humanoid Locomotion

Advanced Robotics Research, EarlyView.
A compliant pneumatic foot with real‐time variable stiffness enables humanoid robots to adapt to changing terrains. Using onboard vision and pressure control, the foot modulates stiffness within each gait cycle, reducing impact forces and improving balance. The design, cast in soft silicone with embedded air chambers and Kevlar wrapping, offers durable,
Irene Frizza, Hiroshi Kaminaga, Philippe Fraisse, Gentiane Venture   +3 more
wiley   +1 more source

Passive isolation/damping system for the Hubble space telescope reaction wheels [PDF]

NASA's Hubble Space Telescope contain large, diffraction limited optics with extraordinary resolution and performance for surpassing existing observatories. The need to reduce structural borne vibration and resultant optical jitter from critical Pointing
Hasha, Martin D.
core   +1 more source

Active-to-absorbing state phase transition in the presence of fluctuating environments: Weak and strong dynamic scaling

, 2012
We investigate the scaling properties of phase transitions between survival and extinction (active-to-absorbing state phase transition, AAPT) in a model, that by itself belongs to the directed percolation (DP) universality class, interacting with a ...
A.-L. Barabasi, Abhik Basu, J. Marro, J.-F. Joanny, L. D. Landau, M. Henkel, Niladri Sarkar, P. Grassberger, U. Täuber, V. N. Gribov, V. N. Gribov, V. N. Gribov, V. N. Gribov   +12 more
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Advances in Electroactive Liquid Crystal Elastomers for Intelligent Robotics and Electronics

Advanced Robotics Research, EarlyView.
Electroactive liquid crystal elastomers (eLCEs) integrate molecular anisotropy with electrical functionality to enable programmable actuation and reconfigurable electronics. This review classifies eLCEs into robotic actuators and adaptive electronics, summarizes key actuation mechanisms, and highlights fabrication strategies that bridge materials to ...
Kavita Ramesh Rathod, Sena Chon, Jae Hyuk Hwang, Sung Hyuk Park, Woohwa Lee, Joonmyung Choi, Shi Hyeong Kim, Seung Hwan Ko, Changsoon Choi, Seon Jeong Kim, Dong‐Gyun Kim, Habeom Lee, Kyung Gook Cho, Woon‐Hong Yeo, Hyun Kim   +14 more
wiley   +1 more source

THE INSERTION LOSS OF POROELASTIC PLATE SILENCERS IN A FLOW DUCT [PDF]

, 2008
Idealized silencers consisting of cavity-backed clamped porous elastic plates parallel to the direction of flow can result in low frequency attenuation of noise in the duct.
Aygun, Haydar
core   +1 more source

Helix Alignment, Chevrons, and Edge Dislocations in Twist‐Bend Ferroelectric Nematics

Advanced Science, EarlyView.
The recently discovered twist‐bend ferroelectric nematic (NTBF) is the new member of the multiferroic family, representing a fluid with an oblique helicoidal (heliconical) periodic structure of spontaneous electric polarization. The work presents a thorough exploration of the material properties of this phase, how the periodic modulation of ...
Bijaya Basnet, Priyanka Kumari, Sathyanarayana Paladugu, Damian Pociecha, Jakub Karcz, Przemysław Kula, Nataša Vaupotič, Ewa Górecka, Oleg D Lavrentovich   +8 more
wiley   +1 more source