Results 71 to 80 of about 88,929 (292)

Tumbling Magnetic Microrobots for Targeted In Vivo Drug Delivery in the GI Tract

Advanced Robotics Research, EarlyView.
We introduce a microrobot design and integrated system for on‐demand targeted drug release in the gastrointestinal tract. The microrobot has an embedded magnet for actuation with external magnetic fields and is visualized in real time using ultrasound. It has two drug release ports sealed with a thermally sensitive wax. Local heating of the wax using a
Aaron C. Davis, Luis Carlos Sanjuan Acosta, Shubh P. Mehta, Baiyan Qi, Yang Yang, Luis Solorio, Craig J. Goergen, David J. Cappelleri   +7 more
wiley   +1 more source

Multiphoton‐Printed Microrobotic Arrays Powered by Discrete, Monolithically Integrated Hydrogel Actuators

Advanced Robotics Research, EarlyView.
Functional surfaces are investigated as a foundation for reconfigurable microscale systems with sensing and actuation capabilities. Advances in additive manufacturing enable our development of planar arrays of hybrid‐material, compliant microdevices that convert environmental stimuli into programmed motion and visual responses.
Sandra Edward, Eric Nieto Gonzalez, Michael Gallegos, Thomas Golecki, Bryan Kaehr, Holly M. Golecki   +5 more
wiley   +1 more source

Non-conventional ultrasound transducer geometry facilitates remote light control within samples

JPhys Photonics
Light control inside a sample is central in areas as relevant as life sciences and material sciences. Traditionally, this is achieved by using external devices, which can be limited by a short working distance, scattering-limited focusing depth, and ...
Jordi Torres-Durall, Martí Duocastella
doaj   +1 more source

Acoustic and relaxation processes in supercooled o-ter-phenyl by optical-heterodyne transient grating experiment

, 2001
The dynamics of the fragile glass-forming o-ter-phenyl is investigated by time-resolved transient grating experiment with an heterodyne detection technique in a wide temperature range. We investigated the dynamics processes of this glass-former over more
A. Patkowski, A. Taschin, A. Taschin, A. Tölle, A.A. Maznev, B. B. Berne, D.M. Paolucci, E. Bartsch, G. D’Arrigo, G. Hinze, G. Hinze, G. Monaco, G.D. Goodno, H. J. Eichler, H.Z. Cummins, H.Z. Cummins, J. P. Boon, J. T. Fourkas, M. Sampoli, N.O. Birge, R. Torre, R. Torre, R. Torre, S.D. Gottke, W. Götze, W. Götze, W. Steffen, W. Steffen, Y. Yan, Y. Yan, Y. Yang, Y. Yang, Y. Yang, Y.H. Hwang   +33 more
core   +1 more source

MicroRoboScope: A Portable and Integrated Mechatronic Platform for Magnetic and Acoustic Microrobotic Experimentation

Advanced Robotics Research, EarlyView.
This work presents the MicroRoboScope, a highly integrated, compact, and portable microrobotic experimentation platform combining electromagnetic and acoustic actuation with real‐time visual feedback into a single, end‐to‐end device. The system enables closed‐loop control and tracking algorithm experimentation within an accessible and unified hardware ...
Max Sokolich, Yanda Yang, Subrahmanyam Cherukumilli, Fatma Ceren Kirmizitas, Sambeeta Das   +4 more
wiley   +1 more source

In Situ Characterisation of Hydrogels via Dynamic Interface Printing

Advanced Science, EarlyView.
ABSTRACT Hydrogels have become pivotal materials for tissue engineering, robotics, biomedical devices, and sensing applications due to their diverse material compositions and tunable mechanical properties. While significant effort has focused on developing novel manufacturing approaches such as extrusion bioprinting and light‐based fabrication methods,
Callum Vidler, Michael Halwes, David J. Collins   +2 more
wiley   +1 more source

Axial Signal Analysis and Image Reconstruction in Acoustic Lens Photoacoustic Imaging System

IEEE Access, 2017
The lateral imaging characteristic of an acoustic lens is similar to the well-known object-image relationship of an optical lens. In this paper, axial signal analysis is carried on and reconstruction methods for a sample's axial photoacoustic (PA) image ...
Yu Zhang, Zhilie Tang, Yongbo Wu, F. D. Jiantong Zhang   +3 more
doaj   +1 more source

Acoustic crystallization and heterogeneous nucleation

, 2001
By focusing a high intensity acoustic wave in liquid helium, we have observed the nucleation of solid helium inside the wave above a certain threshold in amplitude. The nucleation is a stochastic phenomenon.
Balibar, S., Caupin, F., Chavanne, X.
core   +1 more source

Ultrasound Modulation of Visual Circuits in Mice Independent of Auditory Confound

Advanced Science, EarlyView.
In this study, Qiu et al. found that low‐intensity ultrasound can directly activate sparse ultrasound‐sensitive neurons (UNs) in the primary visual cortex (V1) of deafened mice. The proportion of these sparse UNs is pressure‐dependent. Furthermore, ultrasound modulates visual circuitry with distinct excitatory and inhibitory effects.
Jiaru He, Jiejun Zhu, Xinxin Wang, Zihao Chen, Jin Yang, Zhen Yuan, Hongzhi Xu, Lei Sun, Zhihai Qiu   +8 more
wiley   +1 more source

Analysis of advanced optical glass and systems [PDF]

Optical lens systems performance utilizing optical materials comprising reluctant glass forming compositions was studied. Such special glasses are being explored by NASA/Marshall Space Flight Center (MSFC) researchers utilizing techniques such as ...
Feng, Chen, Johnson, R. Barry
core   +1 more source