Cu and Co codoping effects on room-temperature ferromagnetism of (Co,Cu):ZnO dilute magnetic semiconductors Role of dopant, defect, and host oxide in the observed room temperature ferromagnetism: Co-ZnO versus Co -CeO 2

The aim of this study is to investigate functional model of neurons on mesoscopic level. As a typical example, neural model of brainstem -cortex -thalamus circuit was established to simulate the global activities of neuron population. The output of the model was derivative of postsynaptic potential, which was simulated to EEG The epileptic-like EEGs were demonstrated in the case of signal conductance malfunction between brainstem and cortex. The results are useful to support the hypothesis that brainstem malfunction is responsible for the pathogenesis of Infantile Spasm -one of refractory epilepsies.

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<span style="font-size: 10pt; font-family: &quot;Times New Roman&quot;; mso-fareast-font-family: 宋体; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA; mso-bidi-font-size: 9.0pt;" lang="EN-US">The Hindmarsh-Rose (HR) model could describe different discharge property of an excitatory or inhibitory neuron by changing the parameter </span><span style="font-size: 10pt; font-family: &quot;Times New Roman&quot;; mso-fareast-font-family: 宋体; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA;" lang="EN-US">r</span><span style="font-size: 10pt; font-family: &quot;Times New Roman&quot;; mso-fareast-font-family: 宋体; mso-ansi-language: EN-US; mso-fareast-language: EN-US; mso-bidi-language: AR-SA;" lang="EN-US">.</span><span style="font-size: 10pt; font-family: &quot;Times New Roman&quot;; mso-fareast-font-family: 宋体; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA;" lang="EN-US"> In this paper, HR model is used to be the dynamical equations of the spiking model neurons, and different neurons in one neuronal population are connected with WS small-world network. A neurons spiking model in the hippocampus CA3 based on small-world network is established on the Matlab platform. Spike trains of the neurons spiking model are simulated when no stimulus and a pulse current acted on the model. Then rate coding and synchrony coding are used to analysis the simulated spiking trains. Experiment results indicate when no stimulus acts on the neurons spike model, the spike firing of hippocampus CA3 is sparse. When a stimulus acts on the neurons spike model, the mean population firing rate increased obviously. The increasing of neurons firing rate could present the ensemble activities, which highly correlate with memory.</span>