This paper presents a new solution approach to the optimal control problem of fixed frequency switch-mode DC-DC converters using hybrid systems methodologies. In particular, the notion of the N -step model is introduced to capture the hybrid nature of these systems, and an optimal control problem is formulated and solved online, which allows one to easily incorporate in the controller design sa...

We consider the at-the-money strike derivative of implied volatility as the maturity tends to zero. Our main results quantify the growth of the slope for infinite activity exponential Lévy models. As auxiliary results, we obtain the limiting values of short maturity digital call options, using Mellin transform asymptotics. Finally, we discuss when the at-the-money slope is consistent with the s...

Chemotherapy-induced peripheral neuropathy is a frequent treatment-limiting factor that significantly impairs patients' everyday life, also because of a lack of valid palliative options. Here, we report a case of a male patient with a history of metastatic colon cancer and previous chemotherapies. He came to our attention with a peripheral neuropathy that impaired his quality of life and could ...

The minority game is a simple congestion game in which the players’ main goal is to choose among two options the one that is adopted by the smallest number of players. We characterize the set of Nash equilibria and the limiting behavior of several well-known learning processes in the minority game with an arbitrary odd number of players. Interestingly, different learning processes provide consi...

The use of the nasocheek sulcus flap with a cartilage strut provides an aesthetically pleasing result in total columella reconstruction. This provides thin hairless skin appropriate for the subunit. Mohs surgery aids in limiting the excision to the tumor involved area, providing a complete clearance and conserving precious units, which have an impact on the reconstructive options. The method of...

Many high performance liquid chromatography (HPLC) users are confronted with questions about how to improve upon the of an existing or recently developed method. These days, we have many technological options consider, but do choose one (or a few) try? The variables that most important for improving separation complex samples quite different from those convenient resolution simpler samples. Con...

This paper investigates the effect of exit options for the poor on regime stability and distributive spending. Since Hirschman (1970), scholars have long recognized the significance of exit options in explaining regime survival and transition. Much of this work, however, focuses almost exclusively on capital elites and asset mobility. Unfortunately, this focus is quite limiting. Divestment and ...