نتایج جستجو برای: stiction

تعداد نتایج: 277  

Journal: :Biomedical Materials & Devices 2022

Abstract Thermal profiling provides the understanding needed to enhance reliability of Polymerase Chain Reaction (PCR) systems, but is difficult perform experimentally when reagents are housed in capillary tubes. The use 3D numerical simulation with COMSOL here showed that tubes attached a slider moved over 3 differentially heated blocks without slots, central axis temperature points tube provi...

Journal: :Journal of microelectromechanical systems 2023

Vapor hydrogen fluoride (vHF) sacrificial SiO $_{2}$ etching is a crucial process for wafer-level packaging based on silicon migration seal (SMS) technology. In this study, by using test samples with several kinds of patterns and stru...

Journal: :Science and Technology of Nuclear Installations 2023

Establishing a dynamic model that accurately describes realistic pressurized water reactor (PWR) fuel assembly is crucial to precisely evaluate the mechanical properties of in seismic or loss coolant accidents (LOCAs). The pluck test combined with logarithmic decrement method has been widely applied previous studies extract fundamental modal parameters calibrate models. However, most investigat...

2007
J. P. Hayes

We have previously demonstrated that it is possible to fabricate densely-packed high aspect ratio structures in SU-8 by means of a top-plate support member which stiffens the overall structure and prevents pattern collapse. In this work we have computed the tensile stresses induced in the top-plate structures due to the capillary forces that arise between the columns due to the surface tension ...

2008
C. Calandra

We study the influence of the electromagnetic vacuum force on the behaviour of a model device based on materials, like germanium tellurides, that undergo fast and reversible metalinsulator transitions on passing from the crystalline to the amorphous phase. The calculations are performed at finite temperature and fully accounting for the behaviour of the material dielectric functions. The result...

Journal: :Advanced Functional Materials 2023

Diffractive optical elements such as periodic gratings are fundamental devices in X-ray imaging – a technique that medical, material science, and security scans rely upon. Fabrication of structures with high aspect ratios at the nanoscale creates opportunities to further advance applications, especially terms relaxing source coherence requirements. This is because typical grating-based phase te...

2012
Maolin Jin Sang Hoon Kang Pyung Hun Chang

Friction accounts for more than 60% of the motor torque, and hard nonlinearities due to Coulomb friction and stiction severely degrade control performances as they account for nearly 30% of the industrial robot motor torque. Although many friction compensation methods are available (Armstrong-Helouvry et al., 1994; Lischinsky et al., 1999; Bona & Indri, 2005;), here we only introduce relatively...

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