The three-dimensional instability of the flow past a 5 : 1 rectangular cylinder is investigated via Floquet analysis and direct numerical simulations. A quasi-subharmonic (QS) unstable mode detected, marking an important difference with bodies lower aspect ratio and/or smooth leading edge. QS becomes at Reynolds number (based on thickness free-stream velocity) $Re \approx 480$ ; its spanwise wa...

For optimization of real-world arch dams, it is unavoidable to consider two or more conflicting objectives. This paper employs two multi-objective differential evolution algorithms (MoDE) in combination of a parallel working MATLAB-APDL code to obtain a set of Pareto solutions for optimal shape of arch dams. Full dam-reservoir interaction subjected to seismic loading is considered. A benchmark ...

© 2011 ETRI Journal, Volume 33, Number 2, April 2011 Battiti’s mutual information feature selector (MIFS) and its variant algorithms are used for many classification applications. Since they ignore feature synergy, MIFS and its variants may cause a big bias when features are combined to cooperate together. Besides, MIFS and its variants estimate feature redundancy regardless of the correspondin...

Understanding and controlling the nonlinear coupling in micro/nanomechanical resonators are of great importance to exploitation advanced devices. The recently observed electrostatic parametric is a very interesting topic. However, theoretical model remains unclear. This paper explicitly derives electrostatically induced dispersive which reveals ability tune bifurcation topology capacitive analy...

[1] Decadal trends have been noted in the leading mode of boreal winter variability. Given that this mode is thought to be an internal mode of the atmosphere it remains unclear as to what is responsible for interannual to interdecadal oscillations of this mode. We demonstrate that continentalscale snow cover varies at the same multi-year time periods as the atmosphere but leads the atmosphere b...

Making magnetic atoms interact Two magnets interact with each other through a force that depends on the distance between them and on their mutual orientation. How do these long-range dipolar forces affect the behavior of a system of many magnets? Baier et al. used a gas of erbium atoms, which have a large magnetic moment, to answer this question. The gas—which they “housed” in an optical lattic...

Cooperation in work settings goes through communicative interactions where colleagues need to reach a certain level of mutual understanding for coordinating their actions or finding negotiated decisions. Mutual understanding is complex because of the heterogeneity of the participants which makes the interpretations uncertain and unpredictable. We argue here that chronic cooperation is still mor...