Soft Switcing techniques have recently been applied in the design of dc-ac converters, in order to achive better performance, higher efficiency, and power density. One of the soft switching techniques uesd in inverters is resonant dc links. These topologies have some disadvantages such as irregular current peaks, large voltage peaks, uncotrollble pulse width, etc. Another soft switching method ...

The dynamic properties of dry Leighton Buzzard sand have been investigated using a resonant column test apparatus. These data are compared with very low frequency cyclic tests on identical specimens of sand. The comparison indicates that the properties of dry sand are independent of frequency. A simple one-dimensional model of kinematic hardening plasticity is used to predict the dynamic behavi...

Vibration fixtures, at times, have resonant frequencies that exist in the frequency range needed for conducting vibration tests. These resonant frequencies can cause significant problems when running vibration tests over ranges which include these resonances. A test engineer will attempt to control the shaker system through a feedback accelerometer which controls the level of vibration input in...

Table 1: Possible sources of GW with their typical frequency. The last column lists the way to detect such signals. Frequency (Hz) Source Detection Method 10 Primordial Anisotropy of CBR 10 Primordial, Cosmic String Timing of ms pulsars Binary Starts 10 ÷ 10 Supermassive BH Laser interferometers in space Binaries of NS or BH 10 ÷ 10 Supernovae, Pulsars Laser interferometers on earth Coalescence...

An accurate model named as the Modified Wolff Model (MWM) is presented as an efficient CAD tool for determination of resonant frequency of the dominant and higher order modes under the multi-layer condition in thin and thick circular microstrip patch antennas. The effects of dielectric cover on the resonant frequency obtained from MWM have been compared against the result of theoretical method ...

Creating extended, highly homogeneous plasma columns like that required by wakefield accelerators can be a challenge. We study the propagation of ultra-short, TW power ionizing laser pulses in 10-meter-long rubidium vapor and they create. perform experiments numerical simulations for with 780 nm central wavelength, which is resonant D$_2$ transition from ground state atoms, as well 810 some dis...

Soft Switcing techniques have recently been applied in the design of dc-ac converters, in order to achive better performance, higher efficiency, and power density. One of the soft switching techniques uesd in inverters is resonant dc links. These topologies have some disadvantages such as irregular current peaks, large voltage peaks, uncotrollble pulse width, etc. Another soft switching method ...