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The paper partially covered Active Constrained Layer Damping (ACLD) cantilever beams' dynamic modeling, active vibration control, and parameter optimization techniques as the main topic of this research. The dynamic model of the viscoelastic sandwich beam is created by merging the finite element approach with the Golla Hughes McTavish (GHM) model. The governing equation is constructed based on Hamilton's principle. After the joint reduction of physical space and state space, the model is modified to comply with the demands of active control. The control parameters are optimized based on the Kalman filter and genetic algorithm. The effect of various ACLD coverage architectures and excitation signals on the system's vibration is investigated. According to the research, the genetic algorithm's optimization iteration can quickly find the best solution while achieving accurate model tracking, increasing the effectiveness and precision of active control. The Kalman filter can effectively suppress the impact of vibration and noise exposure to random excitation on the system.
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http://www.ncbi.nlm.nih.gov/pmc/articles/PMC11504219 | PMC |
http://dx.doi.org/10.3390/biomimetics9100584 | DOI Listing |
Objective: There are very few studies on the use of a thermomechanical device for reducing injection pain in pediatric dentistry, especially for inferior alveolar nerve blocks (IANBs). The purpose of this study was to assess the efficacy of a thermomechanical device (Buzzy, Pain Care Labs) for reducing pain associated with an IANB for pediatric dental patients.
Methods: A total of 30 children, 5 to 8 years of age undergoing bilateral mandibular dental treatment requiring IANBs, were included in this randomized crossover study.
Int J Sport Nutr Exerc Metab
September 2025
Department of Physical Education and Sport, Faculty of Sport Sciences, University of Granada, Granada, Spain.
The Union Cycliste Internationale recognizes several mountain biking (MTB) disciplines, including downhill, enduro, cross-country short track, cross-country Olympic, cross-country marathon, and multiday stage racing. Cyclocross is recognized as a separate cycling discipline. Both MTB and cyclocross include cycling on off-road surfaces of varying technicality on specialized bicycles purposed for the respective disciplines.
View Article and Find Full Text PDFNeuron
September 2025
Shanghai Stomatological Hospital & School of Stomatology, State Key Laboratory of Medical Neurobiology and MOE Frontiers Center for Brain Science, Institutes of Brain Science, Fudan University, Shanghai, China. Electronic address:
Existing treatments for chronic pain often prove ineffective and carry adverse side effects, highlighting the need for better analgesics, including non-pharmacological treatments. We demonstrate that transcutaneous electrical nerve stimulation (TENS), when repeatedly applied during the early phase of nerve injury in mice, produces sustained analgesic effects by activating the dorsal column nucleus (DCN)-thalamic-cortical pathway, which transmits vibration, discriminative touch, and proprioception. Mechanistically, TENS selectively activates glutamatergic neurons in the DCN (DCN) via exciting Aβ low-threshold mechanoreceptors (Aβ-LTMRs) in dorsal root ganglia (DRGs).
View Article and Find Full Text PDFDysphagia
September 2025
Department of Occupational Therapy, CNC Purun Hospital, Cheongju, Chungcheongbuk-do, Republic of Korea.
This study examined the effects of vibratory stimulation on swallowing-related muscle strength in patients with dysphagia due to stroke, using three types of stimulators and a systematic exercise program. This study was conducted in two stages. In Experiment 1, we examined the effects of three types of vibratory stimulation on the pressure of the tongue and lips (N = 23).
View Article and Find Full Text PDFJ Phys Chem Lett
September 2025
Center for Science at Extreme Conditions (CSEC) and the School of Physics and Astronomy, The University of Edinburgh, EH9 3JZ Edinburgh, United Kingdom.
Through high-pressure diamond anvil cell experiments, we report the synthesis of two novel potassium superhydrides (KH-I and KH-II) and investigate their structural and vibrational properties via synchrotron X-ray powder diffraction and Raman spectroscopy, complemented by density functional theory (DFT) calculations. Above 17 GPa at room temperature, KH-II and H react to form KH-I; this reaction can be accelerated with temperature. KH-I possesses a face-centered-cubic () potassium sublattice with a slight rhombohedral distortion (space group 3̅).
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