Electricity markets are considered to be the most volatile amongst commodity markets. The non-storability of electricity and need for instantaneous balancing demand supply can often cause extreme short-lived fluctuations in prices. These termed price spikes. In this paper, we employ a multiclass Support Vector Machine (SVM) model forecast occurrence spikes German intraday market. As spikes, def...

An accurate measurement of field-grown wheat traits, including spike number, dimension and volume are essential for crop phenotyping yield analysis. A high-throughput method to image in three dimensions is presented with an accompanying unsupervised measuring obtain individual data. Images captured using four structured light scanners on a field mobile platform, creating dimensionally sub-milli...

We study time-delayed coupling in one-dimensional arrays of discrete excitable FitzHugh-Nagumo elements. For small time delays in an excitatory coupling, noise-triggered spikes undergo a slight prolongation. For larger delay times, the coupling to adjacent elements leads to a splitting of spikes and an "echo" effect that produces dampened series of spikes. For very large delay times, a transiti...

What do dendritic nonlinearities tell a neuron about signals injected into the dendrite? Linear and nonlinear dendritic components affect how time-varying inputs are transformed into action potentials (APs), but the relative contribution of each component is unclear. We developed a novel systems-identification approach to isolate the nonlinear response of layer 5 pyramidal neuron dendrites in m...

Alzheimer's disease (AD) is a neurodegenerative disease that gradually induces cognitive deficits. Impairments of working memory have been typically observed in AD. It is well known that spikes and local field potentials (LFPs) as well as the coordination between them encode information in normal brain function. However, the abnormal coordination between spikes and LFPs in the cognitive deficit...

We consider the constrained optimization of excitatory synaptic input patterns to maximize spike generation in leaky integrate-and-fire (LIF) and theta model neurons. In the case of discrete input kicks with a fixed total magnitude, optimal input timings and strengths are identified for each model using phase plane arguments. In both cases, optimal features relate to finding an input level at w...

ER for tiny calcium domains iny microdomains of mitosis-driving calcium signals are created by the ER, as shown by Parry et al. on page 47. Although these calcium spikes were suspected to exist—based on findings that blocking calcium signals prevents mitosis in sea urchins—they have often eluded visualization. Parry et al. were able to detect the calcium spikes by using fly embryos, in which th...

: In order to study the effect of different nitrogen levels on yield components and seed yield of three barley cultivars, an experiment was conducted in 2011-2012 in a research farm of farming building of Islamic Azad University Khorasgan (Isfahan) Branch located in Khatunabad village (latitude 32o /40' N and Longitude 51o /48' E). A split plot layout within randomized com...

Introduction: The functional effects of orexin-B on the calcium spikes and excitability of the neuronal soma membrane of garden snail, Helix aspersa were studied. Methods: Conventional intracellular recording, under the current clamp conditions was performed to examine the effects of orexin-B on the configuration and electrophysiological properties of calcium spikes. Results: Application o...