Dipterous insects (the true flies) have a sophisticated pair of equilibrium organs called halteres that evolved from hind wings. The halteres are sensitive to Coriolis forces that result from angular rotations of the body and mediate corrective reflexes during flight. Like the aerodynamically functional fore wings, the halteres beat during flight and are equipped with their own set of control m...

The Indian Armed Forces with a closely knit community, life of their own provides a unique opportunity to study the adaptive and maladaptive characteristics of his actions. In this study thirty two percent of attempted suicide in the Armed Forces achieved discharge from service is a testament to the urgency and intensity of the need to get out of the service. Twently-two percent of control psyc...

Rotational Fresnel drag - or orbital Faraday rotation in a rotating magnetised plasma is uncovered and studied analytically for Trivelpiece-Gould Whistler-Helicon waves carrying angular momentum (OAM). Plasma shown to introduce non-zero phase shift between OAM-carrying eigenmodes with opposite helicities, similarly the phase-shift spin associated classical effect at rest. By examining dispersio...

At the initial phase of the mechanical product development, it is very important to effectively obtain the modal damping ratio of the bolted joint structure for accurately predicting dynamic response. The energy dissipation has been estimated using a finite element model incorporating the effect of pretension force of the bolted joint. First, the modal damping ratios of the first four modes are...

This paper presents a computer effective nonlinear time-domain strip theory formulation for dynamic positioning (DP) and low-speed manoeuvring. Strip theory or 2D potential theory, where the ship is divided in 20 to 30 cross sections, can be used to compute the potential coefficients (added mass and potential damping) and the exciting wave loads (Froude-Krylov and diffraction forces). Commercia...

This paper describes how a physical simulation can be integrated with our Responsive Workbench system to support complex assembly tasks involving multiple hands and users. Our system uses the CORIOLIS physical simulation package extended to meet the real time requirements for our highly interactive virtual environment. We develop a new set of interface tools that exploit the natural properties ...

Damping in air gaps is studied at RF frequencies and modelled with a viscoelastic wave propagation model, since the traditional squeezed-film damping model is not valid in the MHz regime. The FEM study shows that above a certain frequency the wave propagation in the air gap can be modelled assuming closed damper borders. This closed-border problem is solved analytically from the linearized Navi...

In textbooks of geophysical fluid dynamics, the Coriolis force and the centrifugal force in a rotating fluid system are derived by making use of the fluid parcel concept. In contrast to this intuitive derivation to the apparent forces, more rigorous derivation would be useful not only for the pedagogical purpose, but also for the applications to other kinds of rotating geophysical systems rathe...

In textbooks of geophysical fluid dynamics, the Coriolis force and the centrifugal force in a rotating fluid system are derived by making use of the fluid parcel concept. In contrast to this intuitive derivation to the apparent forces, more rigorous derivation would be useful not only for the pedagogical purpose, but also for the applications to other kinds of rotating geophysical systems rathe...