24,754 research outputs found
Dynamics of Oscillators Coupled by a Medium with Adaptive Impact
In this article we study the dynamics of coupled oscillators. We use
mechanical metronomes that are placed over a rigid base. The base moves by a
motor in a one-dimensional direction and the movements of the base follow some
functions of the phases of the metronomes (in other words, it is controlled to
move according to a provided function). Because of the motor and the feedback,
the phases of the metronomes affect the movements of the base while on the
other hand, when the base moves, it affects the phases of the metronomes in
return.
For a simple function for the base movement (such as in which is the velocity of the base,
is a multiplier, is a proportion and and
are phases of the metronomes), we show the effects on the dynamics of the
oscillators. Then we study how this function changes in time when its
parameters adapt by a feedback. By numerical simulations and experimental
tests, we show that the dynamic of the set of oscillators and the base tends to
evolve towards a certain region. This region is close to a transition in
dynamics of the oscillators; where more frequencies start to appear in the
frequency spectra of the phases of the metronomes
Dynamic Organizations: Achieving Marketplace and Organizational Agility with People
Driven by dynamic competitive conditions, an increasing number of firms are experimenting with new, and what they hope will be, more dynamic organizational forms. This development has opened up exciting theoretical and empirical venues for students of leadership, business strategy, organizational theory, and the like. One domain that has yet to catch the wave, however, is strategic human resource management (SHRM). In an effort to catch up, we here draw on the dynamic organization (DO) and human resource strategy (HRS) literatures to delineate both a process for uncovering and the key features of a carefully crafted HRS for DOs. The logic is as follows. DOs compete through marketplace agility. Marketplace agility requires that employees at all levels engage in proactive, adaptive, and generative behaviors, bolstered by a supportive mindset. Under the right conditions, the essential mindset and behaviors, although highly dynamic, are fostered by a HRS centered on a relatively small number of dialectical, yet paradoxically stable, guiding principles and anchored in a supportive organizational infrastructure. This line of reasoning, however, rests on a rather modest empirical base and, thus, is offered less as a definitive statement than as a spur for much needed additional research
Darwinism, probability and complexity : market-based organizational transformation and change explained through the theories of evolution
The study of transformation and change is one of the most important areas of social science research. This paper synthesizes and critically reviews the emerging traditions in the study of change dynamics. Three mainstream theories of evolution are introduced to explain change: the Darwinian concept of survival of the fittest, the Probability model and the Complexity approach. The literature review provides a basis for development of research questions that search for a more comprehensive understanding of organizational change. The paper concludes by arguing for the development of a complementary research tradition, which combines an evolutionary and organizational analysis of transformation and change
The Making of Faulty Optic's Dead Wedding: Inertia, Chaos and Adaptation
An examination of Faulty Optic's creative process during the devising and construction of their show Dead Wedding. Published by Palgrave Macmillan as Chapter 3 in 'Devising in Process' edited by Alex Mermikides and Jackie Smart, 201
Waveguides with Absorbing Boundaries: Nonlinearity Controlled by an Exceptional Point and Solitons
We reveal the existence of continuous families of guided single-mode solitons
in planar waveguides with weakly nonlinear active core and absorbing
boundaries. Stable propagation of TE and TM-polarized solitons is accompanied
by attenuation of all other modes, i.e. the waveguide features properties of
conservative and dissipative systems. If the linear spectrum of the waveguide
possesses exceptional points, which occurs in the case of TM-polarization, an
originally focusing (defocusing) material nonlinearity may become effectively
defocusing (focusing). This occurs due to the geometric phase of the carried
eigenmode when the surface impedance encircles the exceptional point. In its
turn the change of the effective nonlinearity ensures the existence of dark
(bright) solitons in spite of focusing (defocusing) Kerr nonlinearity of the
core. The existence of an exceptional point can also result in anomalous
enhancement of the effective nonlinearity. In terms of practical applications
the nonlinearity of the reported waveguide can be manipulated by controlling
the properties of the absorbing cladding.Comment: Published versio
- …