630,598 research outputs found
Back to the Future: The Managed Care Revolution
The evolution to a managed care system did not achieve the complete, fundamental change in the health care delivery system that was envisioned by some of its early proponents. As the managed care movement evolved beyond the prepaid group practice model, it focused primarily on methods used to spread the cost of health care services
Hamiltonian dynamics of breathers with third-order dispersion
We present a nonperturbative analysis of certain dynamical aspects of breathers (dispersion-managed solitons) including the effects of third-order dispersion. The analysis highlights the similarities to and differences from the well-known analogous procedures for second-order dispersion. We discuss in detail the phase-space evolution of breathers in dispersion-managed systems in the presence of third-order dispersion
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Global perspectives on legacy systems
Summarises findings of two international workshops on legacy systems, held in conjunction with an EPSRC managed programme. Issues covered include the nature and dynamics of legacy systems, the co-evolution of software and organisations, issues around software as a technology (its engineering and its management), and organisational/people issues
Human Language Origins: Icon for Evolution or a Higher Order?
In his text Icons of Evolution, Jonathan Wells endeavors to reveal some of the many discrepancies supported as scientific fact in current evolution literature. His goal, to discredit such falsely contrived theories as Haeckel’s embryos and Darwin’s finches, is successfully managed through the observance of clear, observational evidence. Meanwhile, Wells renders these so-called “icons” of evolution as nothing more than distorted data. The question of human language origins and the evolutionist’s response serves as another icon in the rhetoric of scientific evolution, yet observations pulled from current scientific research appear to disregard this notion altogether and instead, point towards a higher ordered design. Thus, it is the purpose of this study to reveal and examine the overt discrepancies surrounding the human language origins controversy, which for too long have been undermined by evolution theorists
Stable two-dimensional dispersion-managed soliton
The existence of a dispersion-managed soliton in two-dimensional nonlinear
Schr\"odinger equation with periodically varying dispersion has been explored.
The averaged equations for the soliton width and chirp are obtained which
successfully describe the long time evolution of the soliton. The slow dynamics
of the soliton around the fixed points for the width and chirp are investigated
and the corresponding frequencies are calculated. Analytical predictions are
confirmed by direct PDE and ODE simulations. Application to a Bose-Einstein
condensate in optical lattice is discussed. The existence of a
dispersion-managed matter-wave soliton in such system is shown.Comment: 4 pages, 3 figures, Submitted to Phys. Rev.
Traffic Management Applications for Stateful SDN Data Plane
The successful OpenFlow approach to Software Defined Networking (SDN) allows
network programmability through a central controller able to orchestrate a set
of dumb switches. However, the simple match/action abstraction of OpenFlow
switches constrains the evolution of the forwarding rules to be fully managed
by the controller. This can be particularly limiting for a number of
applications that are affected by the delay of the slow control path, like
traffic management applications. Some recent proposals are pushing toward an
evolution of the OpenFlow abstraction to enable the evolution of forwarding
policies directly in the data plane based on state machines and local events.
In this paper, we present two traffic management applications that exploit a
stateful data plane and their prototype implementation based on OpenState, an
OpenFlow evolution that we recently proposed.Comment: 6 pages, 9 figure
Noise-induced perturbations of dispersion-managed solitons
We study noise-induced perturbations of dispersion-managed solitons by
developing soliton perturbation theory for the dispersion-managed nonlinear
Schroedinger (DMNLS) equation, which governs the long-term behavior of optical
fiber transmission systems and certain kinds of femtosecond lasers. We show
that the eigenmodes and generalized eigenmodes of the linearized DMNLS equation
around traveling-wave solutions can be generated from the invariances of the
DMNLS equations, we quantify the perturbation-induced parameter changes of the
solution in terms of the eigenmodes and the adjoint eigenmodes, and we obtain
evolution equations for the solution parameters. We then apply these results to
guide importance-sampled Monte-Carlo simulations and reconstruct the
probability density functions of the solution parameters under the effect of
noise.Comment: 12 pages, 6 figure
Genetically Modified Products – Contradictions and Challenges
This paper aims to identify the perception that consumers have about GM products, also taking into consideration the evolution of consumption and production of products based on genetically modified organisms. Therefore, the paper presents both aspects to clarify the concept of genetically modified organism (GMO issues such as typology, national or international regulations regarding this area) and global market development of genetically modified organisms, evolution which is presented by statistical data concerning the whole global area cultivated with genetically modified organisms. The paper has also managed to demonstrate through an exploratory research concerning consumer’s knowledge about GMO products, their attitude about biotechnology applications, the need for GMO-based products for scientific progress, the risks or advantages of genetically modified organisms and the paper has also managed to identify the key GMO-based products and to analyze the GMO Roundup Ready soybean species distribution in supermarkets in Bucharest.Biotechnology, genetically modified products, quality, market, producer, consumer
University planning and design under confucianism, colonialism, communism and capitalism : the Vietnamese experience
The university in Vietnam represents a thread of continuity that has managed to survive the political, economic and social turmoil faced so frequently by the Vietnamese people. This paper traces the evolution of the Vietnamese university in terms of its site planning and building design from the Hanoi Van Mieu, a Confucian \u27temple of literature\u27 which, built in 1070AD, is regarded as the country\u27s first university, to today’s system of general and specialised universities and polytechnic institutions. In the late 1990s another step in the process of evolution began with the rationalization and amalgamation of the tertiary system to form two large, multi-campus and multi-disciplinary universities – the Hanoi National University and the Ho Chi Minh National University.<br /
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