Elsevier eBooks, Journal Year: 2024, Volume and Issue: unknown
Published: Jan. 1, 2024
Communications Engineering, Journal Year: 2024, Volume and Issue: 3(1)
Published: July 31, 2024
Abstract Triboelectric and piezoelectric energy harvesters can hardly power most microelectronic systems. Rotational electromagnetic are very promising alternatives, but their performance is highly dependent on the varying mechanical sources. This study presents an innovative approach to significantly increase of rotational harvesters, based dynamic coil switching strategies for optimization connection architecture during generation. Both analytical experimental validations concept self-adaptive harvester were carried out. The adaptive was able provide average 63.3% 79.5% when compared a non-adaptive 16-coil harmonic translation swaying excitations, respectively, 83.5% 87.2% 8-coil harvester. estimated conversion efficiency also enhanced from ~80% 90%. unravels emerging technological wide range applications that cannot be powered by other vibrationally driven harvesters.
Language: Английский
Citations
4
Applied Energy, Journal Year: 2024, Volume and Issue: 376, P. 124302 - 124302
Published: Aug. 28, 2024
Language: Английский
Citations
4
Mechanical Systems and Signal Processing, Journal Year: 2024, Volume and Issue: 214, P. 111360 - 111360
Published: April 4, 2024
The development of self-powering systems has been recognized as critical such that innovative stand-alone emerging technologies can operate sustainably from scavenged ambient energy. Electromagnetic generators (EMGs) using magnetic levitation architectures for mechanical vibration energy harvesting are a promising technology be tailored to specific needs and provide low-cost electric powering both small-scale large-scale devices. They also present non-complex design, with low maintenance requirements stable performance long periods time. Despite these prominent features, their complex non-linear hysteresis-based resonant characteristics makes optimization hard achieve still addressed function the input excitation. Numerical experimental results here provided demonstrate effectiveness new concept EMG aims dynamically adapt coil-array architecture throughout its operation ensure maximum harvested power optimize transduction mechanism efficiency. self-adaptive motion-driven levitation-based autonomously rearranges each coil independently instantaneous time-varying levitating magnet (LM) position. features two dynamic switching strategies: (i) on/off switching, by short circuiting, transmission gate switches, coils without influence on electromotive force; (ii) reversing polarity avoid sum forces cancels other. Average output powers 635 mW (up ∼4.1 W peak power) were obtained only 4-centre (out 14) permanently active coils, while 292 833 achieved 14-coils connected under optimal load conditions harmonic translational excitations 15 Hz frequency 20 mm amplitude. However, adaptive generator was able an impressive average 3 same conditions. Up 14-fold larger 5.5-fold efficiency potential proposed self-adaptation system enhancing total conversion general widespread vibrations.
Language: Английский
Citations
2
Journal of The Royal Society Interface, Journal Year: 2024, Volume and Issue: 21(218)
Published: Sept. 1, 2024
Bioelectronic bone implants are being widely recognized as a promising technology for highly personalized bone/implant interface sensing and biophysical therapeutic stimulation. Such bioelectronic devices based on an innovative concept with the ability to be applied wide range of implants, including in fixation prosthetic systems. Recently, biointerface using capacitive patterns was proposed overcome limitations standard imaging technologies other non-imaging technologies; moreover, electric stimulation non-instrumented implants. We here provide low-power miniaturized electronic system both monitoring network-architectured interdigitated patterns. It comprises five modules: sensing, stimulation, processing, communication power management. This validated vitro tests: concerning system, its detect changes ranging from tiny severe bone-implant target regions validated; significantly enhance cells’ full differentiation, matrix maturation mineralization, also confirmed. work provides impactful contribution paves way development new generation orthopaedic biodevices.
Language: Английский
Citations
2
Schrödinger Journal of Physics Education, Journal Year: 2024, Volume and Issue: 5(3), P. 107 - 116
Published: Sept. 20, 2024
Purpose of the study: The paper examines use Physics Education Technology (PhET) simulations to enhance academic performance third-year science students at Kumasi Wesley Girls' High School. Methodology: research used teacher-made tests, questionnaires, and informal observations collect data. Ninety candidates (90 students) were selected from population using a cluster sampling. questionnaire, pre-evaluation, post-evaluation tests on vectors analyzed descriptive statistics. Main Findings: study found that PhET-based teaching significantly improved in vector resolution, with paired mean difference 6.30 compared pre-treatment tests. questionnaire analysis 90 revealed 85.6% initially applications difficult, 80% felt methods unvaried boring. After PhET lab simulation intervention, 89% enthusiastic about future activities, 78% reported an understanding resultant vectors. indicates student engagement comprehension traditional lecture methods. Novelty/Originality this explores Ghanaian high school School improve resolution learning. interactive approach demystifies complex concepts, quantifies its impact students' performance. It also provides insights into attitudes towards physics education
Language: Английский
Citations
1
Nonlinear Dynamics, Journal Year: 2024, Volume and Issue: unknown
Published: Dec. 24, 2024
Language: Английский
Citations
1
IEICE Electronics Express, Journal Year: 2024, Volume and Issue: unknown
Published: Jan. 1, 2024
Language: Английский
Citations
0
Elsevier eBooks, Journal Year: 2024, Volume and Issue: unknown
Published: Jan. 1, 2024
Citations
0