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Assessing the Importance of Spatial Scale in Climate-Health Models: The Effect of Temperature on Emergency Department Visits in Richmond, Virginia. [PDF]

Geohealth
Le-Huynh TL, Novicoff WM, DeGuzman PB, Davis RE.   +3 more
europepmc   +1 more source

Integrating multiple time-scales to advance relationship science

Journal of Social and Personal Relationships, 2023
It is widely acknowledged that social relationships unfold across multiple time-scales. For example, social interactions that take place over moments, hours, or days also shape relationship change and outcomes over months, years, and even decades. These
David Sbarra, Lizbeth Benson, Saida Heshmati   +2 more
exaly   +2 more sources

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Time-scaled coordination of multiple manipulators

IEEE International Conference on Robotics and Automation, 2004. Proceedings. ICRA '04. 2004, 2004
Coordinating multiple manipulators in a shared workspace while considering their dynamics is an important problem. This problem of collision-free coordination arises in assembly, materials transfer, and welding workcells. Previous approaches that considered robot dynamics have typically been restricted to coordinating just two or three manipulators ...
Srinivas Akella, Jufeng Peng
openaire   +1 more source

Multiple time-scales in network-of-networks

2016 American Control Conference (ACC), 2016
This paper examines a multiple time-scale system where each layer of time-scale dynamics corresponds to a network. Coupling between layers induces a network-of-networks dynamic system. Assuming a hierarchical interaction structure between network time-scale layers with sufficient time-scale differences, layers can be studied under a separation ...
Airlie Chapman, Mehran Mesbahi
openaire   +1 more source

On the Reconstitution Problem in the Multiple Time-Scale Method

Nonlinear Dynamics, 1999
The authors consider general systems of the form \(\ddot q+F(q, \dot q,t;\mu)=0\), where \(\mu\) is a vector containing small physical quantities, or small deviations from the critical values of other parameters. A perturbation parameter \(\varepsilon\) is introduced by the equation \(\mu= \varepsilon \widehat\mu\), \(\widehat\mu= O(1)\), then the ...
LUONGO, Angelo, Paolone A.
openaire   +4 more sources

Multiple time scales in multi‐state models

Statistics in Medicine, 2013
In multi‐state models, it has been the tradition to model all transition intensities on one time scale, usually the time since entry into the study (‘clock‐forward’ approach). The effect of time since an intermediate event has been accommodated either by changing the time scale to time since entry to the new state (‘clock‐back’ approach) or by ...
IACOBELLI, SIMONA, Carstensen, B.
openaire   +6 more sources

Multiple time scale analysis of lasers

AIP Conference Proceedings, 2000
In many areas of engineering and science the mathematical formulation leads to nonlinear problems that are difficult to solve even numerically. Many of the numerical difficulties come from the stiffness of the equations due to the presence of small or large parameters multiplying time derivatives. Very often, the solution exhibits different time scales
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Learning to Control at Multiple Time Scales

2003
In reinforcement learning the interaction between the agent and the environment generally takes place on a fixed time scale, which means that the control interval is set to a fixed time step. In order to determine a suitable fixed time scale one has to trade off accuracy in control against learning complexity.
Ralf Schoknecht, Martin A. Riedmiller
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Multiple time scales in survival analysis

Lifetime Data Analysis, 1995
In some problems in survival analysis there may be more than one plausible measure of time for each individual. For example mileage may be a better indication of the age of a car than months. This paper considers the possibility of combining two (or more) time scales measured on each individual into a single scale.
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Modeling heterogeneous sources on multiple time scales

Proceedings of IEEE INFOCOM '96. Conference on Computer Communications, 2002
We develop parameters and results for a set of traffic models which emulate the traffic patterns at the packet and buffer levels. We show that traffic models at these levels are dependent on the network capacity as well as source-induced bottlenecks such as buffer reads and writes. We propose a pragmatic approach which uses three variations of a simple
Emilie T. Saulnier, Kenneth S. Vastola
openaire   +1 more source