Results 71 to 80 of about 166,451 (293)

Cascade Failure in a Phase Model of Power Grids

, 2012
We propose a phase model to study cascade failure in power grids composed of generators and loads. If the power demand is below a critical value, the model system of power grids maintains the standard frequency by feedback control.
Amaral L. A. N., Arenas A., Barabási A. L., Buldyrev S. V., Buzna L., Chassin D. P., Dörfler F., Filatrella G., Hines P., Kinney R., Moreno M., Sakaguchi H., Sakaguchi H., Sauer P. W., Strogatz S. H., Watts D. J.   +15 more
core   +1 more source

Distinct online and offline effects of alpha and beta transcranial alternating current stimulation (tACS) on continuous bimanual performance and task-set switching

Scientific Reports, 2019
In the present study we examined the effect of bihemispheric in-phase synchronization of motor cortical rhythms on complex bimanual coordination. Twenty young healthy volunteers received 10 Hz or 20 Hz tACS in a double-blind crossover design while ...
K. Heise, T. S. Monteiro, I. Leunissen, D. Mantini, S. Swinnen   +4 more
semanticscholar   +1 more source

Bioinspired Materials, Designs, and Manufacturing Strategies for Advanced Impact‐Resistant Helmets

Advanced Engineering Materials, EarlyView.
This review explores how bioinspired materials, structures, and manufacturing strategies transform helmet design to achieve enhanced impact resistance. Drawing inspiration from nacre, porcupine quills, beetle exoskeletons, and skull architectures, it highlights advances in auxetic lattices, nanocomposites, and functionally graded foams.
Joseph Schlager, Yi Jin, Mohammad Faruk, Jay Alberts, C. Chase Cao   +4 more
wiley   +1 more source

Does 20 Hz Transcranial Alternating Current Stimulation over the Human Primary Motor Cortex Modulate Beta Rebound Following Voluntary Movement?

Brain Sciences
Beta frequency oscillations originating from the primary motor cortex increase in amplitude following the initiation of voluntary movement, a process termed beta rebound.
Mayu Akaiwa, Yuya Matsuda, Ryo Kurokawa, Yasushi Sugawara, Rin Kosuge, Hidekazu Saito, Eriko Shibata, Takeshi Sasaki, Kazuhiro Sugawara, Naoki Kozuka   +9 more
doaj   +1 more source

Nonstationary Synchronization of Equatorial QBO with SAO in Observations and a Model [PDF]

, 2009
It has often been suggested that the period of the quasi-biennial oscillation (QBO) has a tendency to synchronize with the semiannual oscillation (SAO). Apparently the synchronization is better the higher up the observation extends. Using 45 yr of the 40-
Jiang, Xun, Kuai, Le, Shia, Run-Lie, Tung, Ka-Kit, Yung, Yuk L.   +4 more
core   +1 more source

Dual-site high-density 4Hz transcranial alternating current stimulation applied over auditory and motor cortical speech areas does not influence auditory-motor mapping

Brain Stimulation, 2019
Background Verbal repetition of auditory speech requires the mapping of a sensory acoustic input onto articulatory motor plans (auditory-motor mapping).
B. Preisig, Matthias J. Sjerps, A. Kösem, L. Riecke   +3 more
semanticscholar   +1 more source

3D (Bio) Printing Combined Fiber Fabrication Methods for Tissue Engineering Applications: Possibilities and Limitations

Advanced Functional Materials, EarlyView.
Biofabrication aims at providing innovative technologies and tools for the fabrication of tissue‐like constructs for tissue engineering and regenerative medicine applications. By integrating multiple biofabrication technologies, such as 3D (bio) printing with fiber fabrication methods, it would be more realistic to reconstruct native tissue's ...
Waseem Kitana, Indra Apsite, Leonid Ionov   +2 more
wiley   +1 more source

Self‐Powered Real‐Time Temperature Sensing Based on Flexible Ionic Elastomer on Triboelectric Nanogenerators

Advanced Functional Materials, EarlyView.
This study introduces a self‐powered real‐time ionic TENG temperature sensing system for flexible thermal management with high and real‐time temperature monitoring. Ionic liquids and elastomer chains are investigated under temperature via electrochemical and physical analysis, resulting in enhancing thermal sensitivity and output performance on TENG ...
Hee Jae Hwang, Joo Sung Kim, Seungin Oh, Jeonghoon Han, Hanbin Choi, Youngsuk Nam, Jin‐Gyun Kim, Do Hwan Kim, Kwun‐Bum Chung, Dukhyun Choi   +9 more
wiley   +1 more source

Selective modulation of interhemispheric functional connectivity by HD-tACS shapes perception.

PLoS Biology, 2014
Oscillatory neuronal synchronization between cortical areas has been suggested to constitute a flexible mechanism to coordinate information flow in the human cerebral cortex.
Randolph F Helfrich, Hannah Knepper, Guido Nolte, Daniel Strüber, Stefan Rach, Christoph S Herrmann, Till R Schneider, Andreas K Engel   +7 more
doaj   +1 more source

Effects of transcranial alternating-current stimulation to secondary motor areas on cortical oscillations in stroke patients

bioRxiv, 2019
Background There is growing evidence that secondary motor areas are relevant for recovery after motor stroke. Communication among brain areas occurs via synchronization of oscillatory activity which can potentially be modulated via transcranial ...
Lutz A. Krawinkel, M. Bönstrup, J. Feldheim, R. Schulz, W. Backhaus, T. Schneider, J. Misselhorn, B. Cheng, C. Gerloff   +8 more
semanticscholar   +1 more source