Results 41 to 50 of about 497,594 (265)

Pulsed Digital Oscillators for Electrostatic MEMS [PDF]

, 2012
This paper introduces a new actuation scheme for implementing Pulsed Digital Oscillators (PDOs) for electrostatic MEMS resonators. In this scheme, the capacitance of the device is biased with a voltage and it is periodically sampled. Short pulses of zero
Pons Nin, Joan, Blokhina, Elena, Madrenas, J., Gorreta, Sergi, Gorreta Mariné, Sergio, Domínguez Pumar, Manuel, O'Connell, Diarmuid, Feely, Orla, Dominguez, Manuel, Jiménez Serres, Vicente, Ruiz Fernández, Daniel, Madrenas Boadas, Jordi, Fernandez, D., O\u27Connell, Diarmuid, O'Connell, D., Jimenez, V.   +15 more
core   +1 more source

Stiffness of clays and silts: Modeling considerations [PDF]

, 2014
A large database has recently been published that details the development of new empirical expressions for the stiffness reduction with strain of clays and silts.
Vardanega, Paul J, Bolton, Malcolm
core   +1 more source

A self-centering and stiffness-controlled MEMS accelerometer

Microsystems & Nanoengineering
This paper presents a high-performance MEMS accelerometer with a DC/AC electrostatic stiffness tuning capability based on double-sided parallel plates (DSPPs).
Yiming Jin, Zhipeng Ma, Ziyi Ye, Mingkang Li, Xudong Zheng, Zhonghe Jin   +5 more
doaj   +1 more source

Large Stepwise Discrete Microsystem Displacements Based on Electrostatic Bending Plate Actuation

Actuators, 2021
We present the design, fabrication, and experimental characterization of microsystems achieving large and stepwise discrete displacements. The systems consist of electrostatic bending plate actuators linked in a chain with increasing electrode gaps to ...
Lisa Schmitt, Martin Hoffmann
doaj   +1 more source

Metastatic niche shaped by host factors influences disseminated cancer cell fate

FEBS Letters, EarlyView.
Metastasis is shaped not only by cancer cells but also by the environments they encounter. This review explores how factors such as aging, diet, the microbiome, lifestyle, and environmental exposures remodel organ‐specific niches in the lung, liver, bone, and brain, influencing where metastatic cells survive, remain dormant, or grow, and ultimately ...
Gwennan Delyth Ward, Álvaro Ruiz‐Tabas, Patricia Altea‐Manzano   +2 more
wiley   +1 more source

Constraints on chameleon gravity from the measurement of the electrostatic stiffness of the MICROSCOPE mission accelerometers

, 2021
This article is dedicated to the use the MICROSCOPE mission's data to test chameleon theory of gravity. We take advantage of the technical sessions aimed to characterize the electrostatic stiffness of MICROSCOPE's instrument intrinsic to its capacitive measurement system.
Pernot-Borràs, Martin, Bergé, Joel, Brax, Philippe, Uzan, Jean-Philippe, Metris, Gilles, Rodrigues, Manuel, Touboul, Pierre   +6 more
openaire   +2 more sources

Electrostatic tuning of the bending stiffness of a large scale GFRP-CFRP beam [PDF]

SPIE Proceedings, 2006
The suppression of vibrations of a structure is commonly considered a necessary measure for the extension of its lifetime, when high amplitude vibrations are observed. As an alternative to the introduction of discrete damping devices, the modification of the stiffness of a beam is proposed as a means to suppress vibrations due to resonance, thank
Bergamini, A., Christen, R., Motavalli, M.   +2 more
openaire   +2 more sources

Paclitaxel induces NM2‐dependent cellular contraction through GEF‐H1 dissociation from microtubules and RhoA/ROCK activation in cancer cells

Molecular Oncology, EarlyView.
Taxanes are widely used chemotherapeutics whose effects on cellular mechanics remain poorly understood. We show that paclitaxel induces rapid cellular contraction by promoting GEF‐H1 dissociation from microtubules and non‐muscle myosin II activation through RhoA/ROCK.
Gloria Asensio‐Juárez, Rafael Pérez‐Díaz, Hugo Ramos‐Solano, Marina Garrido‐Casado, Vanessa C. Talayero, Miguel Vicente‐Manzanares   +5 more
wiley   +1 more source

Mechanical Simplification of Variable-Stiffness Actuators Using Dielectric Elastomer Transducers

Actuators, 2019
Legged and gait-assistance robots can walk more efficiently if their actuators are compliant. The adjustable compliance of variable-stiffness actuators (VSAs) can enhance this benefit. However, this functionality requires additional mechanical components
David P. Allen, Edgar Bolívar, Sophie Farmer, Walter Voit, Robert D. Gregg   +4 more
doaj   +1 more source

INFLUENCE OF REINFORCING POLYMETHYL METHACRYLATE BY CARBON FIBRES ON FRICTION AND WEAR [PDF]

Journal of the Egyptian Society of Tribology, 2017
The present work aims to investigate the influence of reinforcing polymethyl methacrylate (PMMA) by continuous carbon fibres (CF) on the friction coefficient and wear resistance.
A. A. Ibrahim
doaj   +1 more source