This research systematically investigates the fluid damping for micromachined beam-type resonators with high resonant frequencies. The work s aimed to find a general fluid damping law which can quantitatively be used as a design tool for the resonance-based micro sensors by accurately redicting the quality factor for resonators operated in air or liquid. Micro-cantilevers with different dimensi...

In order to fully characterize the performance of the colloid thruster system the electrospray (ES) beam must itself be fully characterized. This may be achieved by measuring various properties such as flow rate, current, droplet/ion charge to mass ratio and current profile. Beam properties of both standard electrospray mass spectrometry (ESMS) emitters and arrays of custom made micro-fabricate...

A state of the art X-ray micro-CT scanner takes about 20 seconds to acquire a full dataset, which is too slow to capture the rapidly beating heart of small animals. We have been working to develop the first electron-beam micro-CT (EBMCT) prototype for cardiac imaging of the mice and rats. In this paper, we describe the background on electron-beam CT (EBCT) and emphasize the needs for EBMCT. The...

A laboratory diffraction system capable of illuminating individual grains in a polycrystalline matrix is described. Using a microfocus x-ray source equipped with a tungsten anode and prefigured monocapillary optic, a micro-x-ray diffraction system with a 10 microm beam was developed. The beam profile generated by the ellipsoidal capillary was determined using the "knife edge" approach. Measurem...

As complete elimination of porosity from the weld is very difficult, next option available to minimize this porosity, which crucial for safe performance welded components. However, investigation through experiments alone tedious and time consuming. Additionally, limited models are in literature accurate prediction different attributes. The present study, thus, addressees both experimental as we...

A number of protein crystallography techniques have been improved in recent years. With this advancement, many kinds of not only soluble protein but also biological important molecule such as protein complexes and membrane proteins have been analyzed. When such proteins are crystallized, it is difficult to obtain a crystal with a suitable size for the diffraction experiment (~ 100 μm) though we...