This review presents possible strategies to increase the operational frequency range of vibration-based micro-generators. Most vibration-based micro-generators are spring-mass-damper systems which generate maximum power when the resonant frequency of the generator matches the frequency of the ambient vibration. Any difference between these two frequencies can result in a significant decrease in...

Cardiac pacing as a clinical discipline is now over 20 years old. The end of the first decade saw the development of the demand pacemaker, the first "intelligent" implantable prosthetic device. Further progress took place mostly in the latter half of the second decade, with the introduction of lithium power sources with greater longevity, miniaturisation of electronic circuits, overall improvem...

This work presents a Wound Field Synchronous Generators (WFSG) terminal voltage control system modeling and design. The approach proposes simple robust static excitation using Buck converter powered from an external source. calculation of the RMS value voltages for feedback is replaced by obtaining vd component three-phase voltages. Experimental results prove maintenance within established limi...

Abstract Nigeria is endowed with abundant sunshine year-round; thus, solar PV would solve the environmental problems associated petrol-powered generators. However, it unclear whether households are willing to transition. Thus, we analyze households’ willingness pay (WTP) for under four scenarios: (i) WTP when a complemented generator, (ii) completely displaces (iii) plus subsidy, and (iv) given...

Foam Thermoelectric Generators An elastic and durable thermoelectric generator using carbon nanotubes/polydimethylsiloxane foam shows stable power generation in the real stress environment of an automobile engine, where compressive vibrational stresses occur continuously irregularly. The proposed approach by Song Yun Cho, Bumjoon J. Kim, co-workers (article number 2106108) will significantly co...

Fire hazard has destroyed humanity creations. detectors have been developed by using different techniques. Thermoelectric generator (TEG) is a part of energy harvesting which able to convert heat into electricity because temperature difference between hot and cold side thermoelectric device (TE). Different materials are used for generators depend on the characteristics source, sink design gener...

Wind power is experiencing steady growth, and wind turbine technologies are continually developing. Currently, power ratings of up to 20 MW are being considered for future wind farms. Offshore applications, which call for the largest and most powerful wind turbines, demand a higher standard of reliability and maintainability. Because they offer better overall efficiencies and higher reliability...

Biodiesel (FAME) is increasingly used in diesel fuel formulations, however, even small amounts of biodiesel are not appropriate in certain engine applications. For example, biodiesel in aviation fuel and in back-up electric generators used in nuclear power plants can cause significant issues. Likewise, the presence of trace biodiesel in diesel fuel specified for marine pleasure crafts is proble...

A linear, mathematical model of cochlear biomechanics is presented in this paper. In this model, active elements are essential for simulating the high sensitivity and sharp tuning characteristic of the mammalian cochlea. The active elements are intended to represent the motile action of outer hair cells; they are postulated to be mechanical force generators that are powered by electrochemical e...