The present study sets out to integrate the performance-based seismic design approach with the connection topology optimization method. Performance-based connection topology optimization concept aims to simultaneously optimize the size of members and the type of connections with respect to the framework of performance-based seismic design. This new optimization concept is carried out for unbrac...

This paper deals with the design of a periodic output feedback controller for a flexible beam structure modeled with Timoshenko beam theory, Finite Element Method, State space methods and embedded piezoelectrics concept. The first 3 modes are considered in modeling the beam. The main objective of this work is to control the vibrations of the beam when subjected to an external force. Shear piezo...

' ~ e ~ a r t m e n t of Mechanical Engineering, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong E-mail: [email protected] 2Department of Industrial Engineering, Texas A & M University, College Station, T X 77843, USA E-mail: apley @ tamu.edu Department of Industrial Engineering, University of Wisconsin, Madison, Madison, W I 53 706, USA E-mail: [email protected] 4~epart...

ID: 4805 Title: For small field Radiosurgery Intermediate Energy Photons (800kV) show superior dose distributions compared to megavoltage beams Purpose: Beam penumbra is significant when using stereotactic radiosurgery to treat small volumes with limited microscopic extensions. It is challenging to irradiate these lesions if a highly critical structure is in close contact with the target. Previ...

the present study sets out to integrate the performance-based seismic design approach with the connection topology optimization method. performance-based connection topology optimization concept aims to simultaneously optimize the size of members and the type of connections with respect to the framework of performance-based seismic design. this new optimization concept is carried out for unbrac...

We demonstrate the use of neareld scanning optical microscopy (NSOM) for the measurement of the beam properties of SQW-GRINSCH ridge laser diodes. Using NSOM, we measure the eld intensity in the transverse plane at neareld and as a function distance from the facet. The divergence of the laser beam and the beam waists in vertical and lateral dimensions are directly measured and the astigmatism o...

Accelerating structures at mm-wave frequencies are under investigation at SLAC for the purpose of high gradient acceleration. Power sources adequate for substantial acceleration of a beam in a W-band structure are presently not available. An alternative way to achieve high eld levels in a mm wave structure is to drive the structure with a beam that is bunched at a subharmonic frequency. Since t...