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New mathematical method reveals structure in neural activity in the brain
New mathematical method neural activity the brain
2015/11/12
A newly-developed mathematical method can detect geometric structure in neural activity in the brain. "Previously, in order to understand this structure, scientists needed to relate neural activity to...
Traveling Wave Solutions in a Reaction-Diffusion Model for Criminal Activity
Traveling Wave Solutions Reaction-Diffusion Model Criminal Activity
2015/7/14
We study a reaction-diffusion system of partial differential equations, which can be taken to be a basic model for criminal activity, first introduced in [3]. We show that the assumption of a populati...
On electrical correlates of Physarum polycephalum spatial activity: Can we see Physarum Machine in the dark?
Physarum polycephalum plasmodium electric potential behaviour
2010/12/28
Plasmodium of Physarum polycephalum is a single cell visible by unaided eye, which spans sources of nutrients with its protoplasmic network.In a very simple experimental setup we recorded electric pot...
Effect of the duration of the synaptic activity on a delayed recurrent neuronal loop
Effect of the duration synaptic activity delayed recurrent neuronal loop
2010/11/10
A recurrent loop consisting of a single neuron is considered which is influenced by a chemical excitatory delayed synaptic feedback. We show the response of the system is dependent to the duration of ...
An approximation for the activity duration distribution, supporting original PERT
PERT Beta distribution Project management
2010/9/17
The Program Evaluation and Review Technique (PERT) has been widely used as a tool for project management. In PERT analysis the activity time distribution is assumed to be a beta distribution, and the ...
Efficiency and effectiveness in multi-activity network DEA model with fuzzy data
Data envelopment analysis Multi-activity network
2010/9/17
In this paper, at first we introduce a multi-activity network DEA with fuzzy inputs and outputs (MNFDEA) then we make production possibility set with defined constrains. Objective function of this mul...
ESTIMATING THE DEGREE OF ACTIVITY OF JUMPS IN HIGH FREQUENCY DATA
Jumps index of activity infinite activity discrete sampling high frequency
2014/3/13
We define a generalized index of jump activity, propose estimators of that index for a discretely sampled process and derive the estimators’ properties.These estimators are applicable despite the pres...