We apply analytical and numerical methods to study the linear stability of stripe patterns in two generalizations of the two-dimensional Swift-Hohenberg equation that include coupling to a mean flow. A projection operator is included in our models to allow exact stripe solutions. In the generalized models, stripes become unstable to the skew-varicose, oscillatory skew-varicose, and cross-roll i...

The Dye-sensitized nanocrystaline TiO2 solar cell (nc-DSC) developed by Grätzel [1] has the potential to reach low costs in future outdoor power applications. In addition, due to its expected ease of production and possibilities to adjust its appearance, the potential for application is very broad. When plastic foil is used as a substrate for the nc-DSC the production and application possibilit...

in this paper, the enhancement of vehicle stability and handling is investigated by control of the active geometry suspension system (ags). this system could be changed through control of suspension mounting point’s position in the perpendicular direction to wishbone therefore the dynamic is alternative and characteristics need to change. for this purpose, suitable controller needs to change mo...

This paper discusses the role of active anti-roll bar system in order to enhance roll stability cars, thereby preventing rollover phenomenon high speed emergency situations. First, an integrated full car model is proposed including longitudinal, lateral, vertical motions and electro-hydraulic actuator model. In this model, control signal being input current which supplied actuators create torqu...

Work is in progress at IMO-SLF on the development of so called "Second Generation Intact Stability Criteria". This development is expected to be embedded in a three-plus-one-tiers framework comprising vulnerability criteria of level 1 and 2, direct stability assessment and operational guidance. This paper presents two procedures for addressing parametric roll at a vulnerability level 1 and the ...

While the effects of legal and institutional arrangements on political participation are well documented, little attention has been given to the potential participatory effects of one of the United States’ most important electoral laws: constitutionally mandated reapportionment. By severing the ties between constituents and their incumbents, we argue, redistricting raises information costs, lea...

First we develop the theory of reduced instability in order to analyze stability of bifurcating solutions via the Liapunov{Schmidt reduction. Next, this theory is generalized to cover sideband instabilities using a Floquet ansatz. The method is applied to roll patterns in the Swift{Hohenberg equation which serves as a model for pattern formation. We analyze the stability problem of small rolls ...

A simple robust yaw controller for the nonlinear single-track model is designed, making use of active di erential and active roll control systems. Robustness is studied for uncertainties in several model parameters, namely the vehicle longitudinal velocity, the road adherence coe cients and the hand wheel angle. Constructive nonlinear dynamics are employed for the controller design. The control...

• Planning stowage with the presence of dangerous goods is critical. Step-wise planning approach proposed for Roll-on Roll-off Ships. The shows significant improvement in safety, and fuel CO 2 reduction. Realistic test instances are based on real data from collaborating shipping company. This first research study topic stowing ships transporting goods. critical to ensure safety at sea. In this ...