We study the propagation of very large amplitude localized excitations in a model of DNA that takes explicitly into account the helicoidal structure. These excitations represent the "transcription bubble," where the hydrogen bonds between complementary bases are disrupted, allowing access to the genetic code. We propose these kinds of excitations in alternative to kinks and breathers. The model...

Vibration isolators are widely used in high-precision machines to reduce the transmissibility function T , which represents the transfer from base frame vibrations to payload vibrations. Active vibration control (AVC) can be used to further improve T . However, for industrial systems with AVC it is often difficult to show improvement of T via system identification, since it is hard to sufficien...

tuned liquid dampers (tld) are among passive control devices that have been used to suppress the vibration of structures in recent years. these structures must be adequately presentable as an equivalent single degree of freedom system with long fundamental period. the tld, located at the top floors of the structure, can dissipate the external input energy into the system through the sloshing ef...

When structures are subjected to strong ground motion excitations, structural elements may be prone to yielding, and consequently experience significant levels of inelastic behavior. The effects of inelastic behavior on the distribution of peak floor loads are not explicitly accounted for in current seismic code procedures. During recent years, many studies have been conducted to develop new de...

Base-isolated structures achieve superior seismic performance but with the cost of large deformation base floor, which possibly causes superstructure collapse during severe earthquakes. Hence, it is great interest to develop hybrid isolation systems that can reduce and simultaneously improve superstructure’s performance. Recently, several using inerter-based dampers have emerged; however, nonli...

In the last two decades, there has been an increasing interest in structural engineering control methods. Shape memory alloys and seismic isolation systems are examples of passive control systems that use of any one alone, effectively improve the seismic performance of the structure. Characteristics such as large strain range without any residual deformation, high damping capacity, excellent re...