1,721,035 research outputs found
Programming Agent Mobility
No full textMobile agents seem an interesting solution for the design and deployment of Web services and applications in the Internet scenario. However, mobility complicates the design of applications and calls for new approaches to facilitate the specification and control of the mobility behaviour without any impact on agent implementation. The paper advocates a policy-based model to specify mobility strategies separately from the agent code and presents a policy controlled mobile agents framework. This approach permits to adapt agent applications to the evolving conditions of the execution environment. The paper also presents a case study to validate our policy-based solution to agent mobility. © Springer-Verlag 2002
A Policy-based Mobile Agent Infrastructure
No full textThe mobile agent paradigm seems to provide promising solutions for developing applications in the Internet environment. However, the adoption of mobile agents introduces specific problems related to the specification and control of agent migration strategies. The paper advocates a policy-based solution to support the flexible management and dynamic configurability of agent mobility behaviour. Our solution permits to define agent migration strategies at a high level of abstraction, separately from the agent code, thus promoting a clear separation between mobility and computational concerns. The paper describes the policy-based middleware that allows to adapt at run time agent migration strategies to evolving application requirements and environment conditions without impact on the agent code implementation
In vitro assessment of a new algorithm for quantitative echo measurement of heart valve regurgitant jet
No full textSpace and time dependency of inertial and convective contribution to the transmitral pressure drop during ventricular filling
No full textExtreme hyperosmolarity and severe ketoacidosis in a child with type 1 diabetes mellitus at onset safely treated with current guidelines
No full textNot availabl
Differences in both matrix metalloproteinase 9 concentration and zymographic profile between plasma and serum with clot activators are due to the presence of amorphous silica or silicate salts in blood collection devices.
Full text linkThe vortex-an early predictor of cardiovascular outcome?
No full textBlood motion in the heart features vortices that accompany the redirection of jet flows towards the outlet tracks. Vortices have a crucial role in fluid dynamics. The stability of cardiac vorticity is vital to the dynamic balance between rotating blood and myocardial tissue and to the development of cardiac dysfunction. Moreover, vortex dynamics immediately reflect physiological changes to the surrounding system, and can provide early indications of long-term outcome. However, the pathophysiological relevance of cardiac fluid dynamics is still unknown. We postulate that maladaptive intracardiac vortex dynamics might modulate the progressive remodelling of the left ventricle towards heart failure. The evaluation of blood flow presents a new paradigm in cardiac function analysis, with the potential for sensitive risk identification of cardiac abnormalities. Description of cardiac flow patterns after surgery or device therapy provides an intrinsic qualitative evaluation of therapeutic procedures, and could enable early risk stratification of patients vulnerable to adverse cardiac remodelling
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