Implementation and collapse of exchange rate pegging schemes are recurrent events. A currency crisis is often followed by an economic downturn while pegging often begets a boom. In this paper I study why a benevolent central bank should pursue a monetary policy that leads to those recurrent currency crises and subsequent periods of pegging. I show that the optimal policy induces a competitive e...

In recent years, agricultural machinery for precision agriculture has made extensive use of information and communication technologies. An Android-based module was developed in this study to allow the nozzles on field sprayer booms be opened closed as a group. The tested 24 m working width sprayer, controlling 48 pairs 4-8 groups based GPS position data. For control, an electronic control unit ...

In the design of supersonic low-boom aircraft, it is important to balance the aerodynamic performance and sonic boom requirements in a way that represents the best compromise for the overall design. Since the ground sonic boom is typically not a smooth function of the design variables and may actually contain multiple local minima, it is important to select an optimization algorithm that is abl...

The practical use of high-fidelity multidisciplinary optimization techniques in low-boom supersonic business jet designs has been limited because of the high computational cost associated with CFD-based evaluations of both the performance and the loudness of the ground boom of the aircraft. This is particularly true of designs that involve the sonic boom loudness as either a cost function or a ...

We introduce the Boom Chameleon, a novel input/output device consisting of a flat-panel display mounted on a tracked mechanical boom. The display acts as a physical window into 3D virtual environments, through which a one-to-one mapping between real and virtual space is preserved. The Boom Chameleon is further augmented with a touch-screen and a microphone/speaker combination. We present a 3D a...

This article argues that competitive electricity markets are prone to the same cycles of boom and bust that appear in commodity markets and in a specialized industry like real estate. The article then demonstrates how boom and bust might appear in the western electricity system using computer simulation. A “business as usual” simulation shows that the west might be at the crest of a building bo...