Indiana University has designed and finished construction of the Midwest Proton Radiotherapy Institute (MPRI) [1] consisting of one treatment room with two fixed horizontal beam lines and two treatment rooms with isocentric gantries. The first treatment room has been operating since February 2004, while the first Gantry treatment room has been in use treating patients since April 2007. The prot...

In this paper, based on the nonlocal Timoshenko beam theory, a nonlinear model is presented for the vibrational behavior of carbon nanotubes (CNTs) embedded in elastic medium in thermal environment. Using the Timoshenko beam theory and nonlocal elasticity of Eringen, the influences of rotary inertia, transverse shear deformation and small scale effect are taken into account. To model the intera...

The static pull-in instability of beam-type micro-electromechanical systems is theoretically investigated. Two engineering cases including cantilever and double cantilever micro-beam are considered. Considering the mid-plane stretching as the source of the nonlinearity in the beam behavior, a nonlinear size-dependent Euler-Bernoulli beam model is used based on a modified couple stress theory, c...

Neutralization of external stimuli in dynamic systems has the major role in health, life, and function of the system. Today, dynamic systems are exposed to unpredicted factors. If the factors are not considered, it will lead to irreparable damages in energy consumption and manufacturing systems. Continuous systems such as beams, plates, shells, and panels that have many applications in differen...

Under high gravity loads, steel double-beam floor systems need to be reinforced by beam-end concrete panels reduce the material quantity since rotational constraints from panel can decrease moment demand inducing a negative at ends of beams. However, optimal design process for beams requires time-consuming iterative analysis entire system while especially keeping in consideration composite conn...