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Fi rms in the LDCs need to adopt and indige n i ze tra n s fe rred tech n o l ogy befo re u s age. The adoption costs depend on the state of the infra s t ru c t u re and on the l o c a l i zed spillover effects ge n e rated by a rival fi rm. In this context, the pap e r examines the timing of such technological adoption. It shows that strategic decisions regarding time may result in a “waiting...

This chapter deals with the control of chaos exhibited in the behavior of a one-degree-of-freedom impact mechanical oscillator with a single rigid constraint. The mathematical model of such impact oscillator is represented by an impulsive hybrid linear non-autonomous dynamics. The proposed control approach is based chiefly on the OGY method. First, an analytical expression of a constrained cont...

John Snow is closely linked to the his tory of chol era, but even more so to ep i de mi ol ogy, med i cal ge og raphy and car tog ra phy. Yet in most con tem po rary text books the de scrip tion of his work tends to be cur sory, leav ing out rich de tails of his ex is tence. To pres ent a wider view of John Snow and his ac com plish ments, a website was cre ated at the UCLA De part ment of Ep i...

This paper aims at providing a numerical calculation method of the spectrum of Lyapunov exponents in a four-dimensional impulsive hybrid nonlinear dynamics of a passive compass-gait model under the OGY control approach by means of a controlled hybrid Poincaré map. We present a four-dimensional simplified analytical expression of such hybrid map obtained by linearizing the uncontrolled impulsive...

Chaotic dynamical systems characteristically exhibit erratic, seemingly random, behavior. They are highly sensitive to initial conditions. Any alteration to the state of a chaotic system will eventually lead to very large differences in behavior. Until recently, the preferred approach to chaotic dynamical systems has been to avoid them. A method developed by Ott, Grebogi, and Yorke (OGY) takes ...

Widespread interest in composting as a means of municipal sludge treatment began in the early 1970s, and has i n c r e d dramatically since that time. In 1984, the U. S. Environmental Protection Agency (EPA) initiated a technology evaluation of municipal sludge composting based on investigations at five o p erating facilities.' The facilities studied generally processed sludge reliably and effe...

Cells are basic functional units of life and control a wide range of intraand extra-cellular activities. They are highly complex structures with unique biomechanical properties to withstand the physiological environment as well as mechanical stimuli. Studies related to the mechanics of single cells are aimed at describing the molecular mechanisms responsible for the physical integrity of the ce...

In the field of computational terminology, in addition to work on term extraction, more and more research highlights the importance of structuring terminology, that is, finding and labeling the links between terminological units. Retrieving such relations between terms is usually undertaken using either “external” or “internal” methods (see Daille et al. (2004) for an overview). External method...