Results 111 to 120 of about 3,882,562 (249)

Multifrequency methods for Electrical Impedance Tomography [PDF]

, 2015
Multifrequency Electrical Impedance Tomography (MFEIT) is an emerging imaging modality which exploits the dependence of tissue impedance on frequency to recover images of conductivity.
Malone, ER
core  

Reflection of an acoustic line source by an impedance surface with uniform flow

, 2014
An exact analytic solution is derived for the 2D acoustic pressure field generated by a time-harmonic line mass source located above an impedance surface with uniform grazing flow. Closed-form asymptotic solutions in the far-field are also provided.
Gabard, Gwénaël, Brambley, E.J., Gabard, G., Brambley, E. J.   +3 more
core   +1 more source

Unlocking Terahertz Steganography: Authentication of Hidden Images in Flexible Media

Advanced Materials Technologies, EarlyView.
Hidden information in multilayered devices, such as steganographic portraits, is detected and authenticated using reflection‐mode terahertz time‐domain imaging. Image reconstruction relies on a dedicated figure‐of‐merit obtained by integrating the signal intensity over the time‐window associated with the reflection from the metallic mirror backing the ...
Tiziana Ritacco, Francesca Vittorioso, Dimitrios C. Zografopoulos, Romeo Beccherelli, Walter Fuscaldo   +4 more
wiley   +1 more source

Motion Planning for Human Crowds: from Individuals to Groups of Virtual Characters [PDF]

, 2012
Virtual worlds, to become more lively and appealing, are typically populated by large crowds of virtual characters. One of the fundamental tasks that these characters have to perform is, on one hand, to plan their paths between different locations in the
Karamouzas, I., Sub Games & Virtual Worlds begr. 1/9/13, Games and Virtual Worlds   +2 more
core   +1 more source

On‐Chip Photonic Neural Network Architectures

Advanced Optical Materials, EarlyView.
This review presents a comprehensive overview of on‐chip photonic neural network architectures, covering key photonic building blocks, representative network types, and emerging applications. Recent advances, implementation challenges, and future directions are examined, highlighting the potential of integrated photonics to enable ultrafast, energy ...
Seokjin Hong, Berkay Neseli, Seungyeon Cho, Seungsoo Lee, Yeonjun Kim, Seungyoon Choi, Hyo‐Hoon Park, Hamza Kurt   +7 more
wiley   +1 more source

Tele-Impedance control of a virtual avatar based on EMG and M-IMU sensors: a proof-of-concept

Scientific Reports
The broad spread of cooperative robots into many application domains has resulted in a demand for intuitive and effective solutions for teleoperated control.
Silvia Buscaglione, Alessia Noccaro, Nevio Tagliamonte, Giulia Ticchiarelli, Giovanni Di Pino, Domenico Formica   +5 more
doaj   +1 more source

Modeling, Analysis, Resilience Improvement of Autonomous AC Microgrids With Virtual Output Impedance Control Under False Data Injection Attacks

IEEE Open Journal of the Industrial Electronics Society
This paper focuses on the modeling, analysis, and mitigation of a new false data injection attack targeting the virtual output impedance control of droop-based distributed energy resources in a microgrid with distribution lines of low X/R ratios.
Yifeng Huang, Mianzhi Wu, Fei Xue, Lin Jiang, Chee Shen Lim   +4 more
doaj   +1 more source

Obstacle avoidance of Mobile Robot with Virtual Impedance

Journal of Korean Institute of Intelligent Systems, 2009
Abstract In this paper, a virtual force is generated and fed back to the operator to make the teleoperation more reliable, which reflects the relationship between a slave robot and an uncertain remote environment as a form of an impedance. In general, for the teleoperation, the teleoperated mobile robot t akes pictures of the remote environment and ...
openaire   +2 more sources

A Review on Sensor Technologies, Control Approaches, and Emerging Challenges in Soft Robotics

Advanced Robotics Research, EarlyView.
This review provides an introspective of sensors and controllers in soft robotics. Initially describing the current sensing methods, then moving on to the control methods utilized, and finally ending with challenges and future directions in soft robotics focusing on the material innovations, sensor fusion, and embedded intelligence for sensors and ...
Ean Lovett, Maxwell Hammond, Niloufar Seyfi, Amirreza Fahim Golestaneh, Venanzio Cichella, Caterina Lamuta   +5 more
wiley   +1 more source

Repetitive Control of Robotic Joint With Variable Impedance Utilizing Agonist-Antagonist Muscle Pair Structure Based on Virtual Trajectories

IEEE Access
Realizing accurate trajectory-tracking control for flexible robotic joints using a model-free approach is challenging. In this study, the repetitive control based on virtual trajectory, which is a model-free control method proposed for flexible human ...
Kaho Umeda, Yinlai Jiang, Hiroshi Yokoi, Shunta Togo   +3 more
doaj   +1 more source