The objective of this paper is to mitigate the wave-induced vibration of offshore platform with magneto-rheological (MR) damper. The model of the platform coupled with MR damper is established where the external wave force is approximated with a white noise via a designed filter. Based on Linear Quadratic Gaussian (LQG) method, the optimal control force is determined when taking the measurement...

Two of recent progress in lattice QCD approach to nuclear force are reported. (i) Tensor force from quenched lattice QCD: By truncating the derivative expansion of inter-nucleon potential to the strictly local terms, we obtain central force VC r and tensor force VT r separately from swave and d-wave components of Bethe-Salpeter wave function for two nucleon state with JP 1 . Numerical calculati...

Ocean wave simulation has a wide range of applications in movies, video games and training systems. Wind force is the main energy resource for generating ocean waves, which are the result of the interaction between wind and the ocean surface. While numerous methods to handle simulating oceans and other fluid phenomena have undergone rapid development during the past years in the field of comput...

We give an almost complete classification of empty lattice simplices in dimension 4 using the conjectural results of Mori-Morrison-Morrison, later proved by Sankaran and Bober. In particular, all of these simplices correspond to cyclic quotient singularities, and all but finitely many of them have width bounded by 2.

Reliable transmission of digital data is essential in today’s society given its role in technological advances such as transmission of satellite images, wireless communications, and data storage/retrieval. The aim of channel coding is to allow transmission of information over a noisy channel in such a way that the receiver can recover the original information. To accomplish this, some level of ...

A high power millimeter (mm) wave, in the presence of a magnetic wiggler, produces a large longitudinal ponderomotive force that can accelerate electrons. When a plasma of density n ~ ncr, where ncr is critical density, is introduced in the interaction region, the ponderomotive force resonantly drives a plasma wave that accelerates electrons to higher energies. However, propagation of the mm wa...

she returns to time and time again in her many interviews and articles. In her reflections on motherhood, both inside and outside her fiction, Morrison articulates a fully developed theory of African American mothering that is central to her larger political and philosophical stance on black womanhood. Building upon black women’s experiences of, and perspectives on motherhood, Morrison develops...