We demonstrate the design, fabrication, evaluation, and use of a self-powered microphone that is thin, flexible, easily manufactured. Our technology referred to as Self-powered Audio Triboelectric Ultra-thin Rollable Nanogenerator (SATURN) microphone. This acoustic sensor takes advantage triboelectric nanogenerator (TENG) transform vibrations into an electric signal without applying external power source. The sound quality SATURN mic, in terms sensitivity, frequency response, directivity,...

Abstract The twist angle between a pair of stacked 2D materials has been recently shown to control remarkable phenomena, including the emergence flat‐band superconductivity in twisted graphene bilayers, higher‐order topological phases moiré superlattices, and polaritons hyperbolic metasurfaces. These discoveries, at foundations emergent field twistronics, have so far mostly limited explorations atomically thin condensed matter photonic systems, with limitations on degree over geometry angle,...

Abstract Materials based on minimal surface geometries have shown superior strength and stiffness at low densities, which makes them promising continuous‐based material platforms for a variety of engineering applications. In this work, it is demonstrated how these mechanical properties can be complemented by dynamic functionalities resulting from robust topological guiding elastic waves interfaces that are incorporated into the considered platforms. Starting definition Schwarz P surface,...

In the present research, glass and basalt fiber-reinforced polypropylene composites’ behaviour in quasi-static dynamic conditions is studied. Composites were fabricated by vacuum assisted Compression molding method. failure under tension compressive was studied along with its low-velocity impact super-sonic shock loading conditions. The study results showed that (Basalt/PP) composite’s tensile strength higher than (Glass/PP). Basalt/PP no penetration against low velocity (LVI) negligible...

Quasiperiodic metastrucures are characterized by edge localized modes of topological nature, which can be significant technological interest. We here investigate such for stiffened and sandwich beams, employed as structural members with inherent vibration localization capabilities. Quasiperiodicity is achieved altering the geometric properties material beams. Specifically, in location stiffeners modulated to quasiperiodic patterns, while, core’s varied a step-wise manner generate patterns....

Ultra-high molecular weight polyethylene (UHMWPE) has the potential to make a significant contribution efforts currently being made help protect environment by reducing carbon emissions through substitution of heavy conventional materials with lightweight polymeric materials. Used on its own, UHMWPE also offers complete recyclability thermoplastic matrices. fibre-based composites (both and thermoset) offer wide range applications in various fields such as military protective suits,...

As the power requirements for microelectronics continue decreasing, environmental energy sources can begin to replace batteries in certain wearable subsystems. In this paper we report on a shoe generator based micro structured piezoelectric polymer transducer. The properties of transducer match regular filling and it is designed harness from human walk without affecting user's gait. generated regulated with self-powered dc/dc conversion circuit that achieves high 65% efficiency converting...

Aircraft preliminary design and optimization relies on the dynamic response of complex structures such as wings. This analysis cannot leverage high-fidelity that typically involves computationally expensive three-dimensional (3-D) finite element models. Complex can be reduced to one-dimensional (1-D) structures, known stick models decrease computational time. Instead, this paper presents a methodology for reducing 3-D model structure into an equivalent beam-like obtain set elastic constants...

The aim of this work is to achieve smooth multiple parallel paths (lanes) confined within a bounded volume (corridor) through controlled airspace in urban scenarios. problem formulated as two subproblems: cross-section planning and corridor planning. optimized for minimizing the width required number while taking into account downwash effects. Corridor utilizes modified A* algorithm waypoint generation conjunction with logistic curve based path smoothly connecting these waypoints accounting...

A major cost, inconvenience, and source of failure for adding sensors electronic accessories to automobiles is wiring the systems into car's power supply. We propose an alternative approach, computer-proximal energy harvesting, which harvests locally, so not needed. In this article, we provide overview principles empirical evaluations harvesting in around automobile exploring role that wind, light, vibration, heat can play process. To better explore these concepts, demonstrate two...

The present work investigates the nonlinear bending and buckling behavior of carbon nanotubes (CNTs) using variational asymptotic method. Considering a CNT as slender beam structure, an asymptotically-correct continuum model is presented. Through resulting moment-curvature relationship, captures phenomenon ovalization cross sections local CNT, which arises due to their geometrical nature. Further studies are performed in order explore effect wall thickness on structure. It shown that...

The escalating energy demands of main memory have become a concern in modern computing architectures, particularly large-scale systems, due to frequent access patterns, increasing data volumes, and the lack efficient power management strategies. Accurate modeling DRAM consumption is essential address this challenge optimize efficiency. However, existing tools that heavily rely on vendor-provided datasheet values lead big discrepancy between estimation result real-word consumption. In work,...

The escalating energy demands of main memory have become a concern in modern computing architectures, particularly large-scale systems, due to frequent access patterns, increasing data volumes, and the lack efficient power management strategies. Accurate modeling DRAM consumption is essential address this challenge optimize efficiency. However, existing tools that heavily rely on vendor-provided datasheet values lead big discrepancy between estimation result real-word consumption. In work,...

Natural fibres usually include hemp, jute, and flax are gaining importance in composites with an increasing potential to replace synthetic advanced composites. Current glass carbon fibre systems require large amount of energy production, which has led upsurge interest the reinforcement natural fibres. Especially fibres, higher variability mechanical properties is a major challenge. Therefore, prediction laminate performance at early stages design requires computation. The present work was...

Natural fibres usually include hemp, jute, and flax are gaining importance in composites with an increasing potential to replace synthetic advanced composites. Current glass carbon fibre systems require large amount of energy production, which has led upsurge interest the reinforcement natural fibres. Especially fibres, higher variability mechanical properties is a major challenge. Therefore, prediction laminate performance at early stages design requires computation. The present work was...