We demonstrate read-write-read-erase cyclical mechanical-memory properties of all-thin-film multiferroic heterostructured cantilevers when a high voltage is applied on the PbðZr0:52Ti0:48ÞO3 piezo-film. The device state switching process occurs due to the presence of a hysteresis loop in the piezo-film frequency response. The reference frequency at which the strain-mediated Fe0:7Ga0:3 based mul...

Vacuum breakdown in normal-conducting accelerating structures is a limiting factor for high gradient acceleration. Many aspects of the physics governing the breakdown process and its onset are yet to be fully understood. At Uppsala University we address these questions with an in-situ experimental setup mounted in an environmental scanning electron microscope. It consists of a piezo motor drive...

nt matter & 2013 0.1016/j.nanoen.2 thor at: School of Institute of Tech . [email protected] Abstract Piezo-phototronic effect is demonstrated in the ZnO/P3HT solar cell system and detailed study is conducted regarding the influence of crystallization and doping level of ZnO on the strength of piezo-phototronic effect as well as the overall solar cell performance. By testing and comparing five gro...

Phase modulation at 125 kHz in a Michelson interferometer using an inexpensive piezoelectric stack driven at resonance. Fast phase modulation has been achieved in a Michelson interferometer by attaching a lightweight reference mirror to a piezoelectric stack and driving the stack at a resonance frequency of about 125 kHz. The electrical behavior of the piezo stack and the mechanical properties ...

Background Piezo-electric surgery is a procedure used recently in Oral-Maxillo-Facial Surgery [1]. The basic mechanisms are ultrasounds, that working in a frequency range between 25 and 30 Khz, determining very low oscillations on the tip of the handpiece, with effectiveness in cutting hard tissue but absolutely atraumatic on the soft tissue [2], with bio-stimulating effects. Piezo-electric cut...

INTRODUCTION Continuous positive airway pressure (CPAP) is used in air ambulances to treat patients with impaired oxygenation. Differences in mechanical principles between CPAP devices may affect their performance at different ambient air pressures, as will occur in an air ambulance during flight. METHODS Two different CPAP systems, a threshold resistor device and a flow resistor device, at s...

We propose the notion of {\it resistance of a graph} as an accompanying notion of the structure entropy to measure the force of the graph to resist cascading failure of strategic virus attacks. We show that for any connected network $G$, the resistance of $G$ is $\mathcal{R}(G)=\mathcal{H}^1(G)-\mathcal{H}^2(G)$, where $\mathcal{H}^1(G)$ and $\mathcal{H}^2(G)$ are the one- and two-dimensional s...

The flow-resistive characteristics of a variety of commercially available expiratory positive-pressure valve systems used to provide continuous positive airway pressure (CPAP) and positive end-expiratory pressure were evaluated. One flow-resistor and seven threshold-resistor expiratory pressure valve systems were set at 5, 10, 15, 20, and 25 cm H2O of expiratory pressure, and sinusoidal exhaled...

We demonstrate the novel and compact implementation of literal gates with one literal window and two literal windows using only resonant tunneling diodes (RTDs). The proposed circuit consists of only three RTDs and one resistor for one literal window and four RTDs and one resistor for two literal windows, with the configuration of a series-connected RTD pair and a series-connected RTD and a res...