A new proposal of blind channel estimation method for long term evoluation (LTE) based on combining advantages of denoising property of wavelet transform (WT) with blind estimation capability of independent component analysis (ICA) called wavelet denoising of ICA (WD-ICA) was presented. This new method increased the spectral efficiency compared to training based methods, and provided considerab...

Independent component analysis (ICA) is a class of algorithms widely applied to separate sources in EEG data. Most ICA approaches use optimization criteria derived from temporal statistical independence and are invariant with respect to the actual ordering of individual observations. We propose a method of mapping real signals into a complex vector space that takes into account the temporal ord...

BACKGROUND AND PURPOSE Acute stroke from occlusion of the intracranial internal carotid artery (ICA) generally has a poor prognosis and appears to respond poorly to intravenous thrombolysis. Mechanical thrombectomy is a newly available modality for acute stroke therapy, but it is unknown whether this endovascular therapy may have a role in the specific setting of intracranial ICA occlusion. We ...

A perforated-patch whole-cell recording method was used to determine whether nitric oxide signaling participates in acetylcholine (ACh)-induced regulation of basal L-type Ca2+ current (ICa,L) in cat atrial myocytes. Exposure to 1 microM ACh for 2 min inhibited basal ICa,L (-21 +/- 3%), and withdrawal of ACh elicited rebound stimulation of ICa,L above control (80 +/- 13%) (n = 23). Stimulation o...

BACKGROUND We have previously shown major differences in beta-adrenergic and muscarinic modulation of L-type calcium currents (ICa) in newborn and adult rabbit heart. However, little is known about developmental changes in modulation of ICa by phosphodiesterases (PDEs), which also regulate intracellular cAMP concentration by its hydrolysis. METHODS AND RESULTS Enzymatically isolated adult and...

The effects of changing the intracellular Ca concentration ([Ca]i) on the calcium current (iCa) were studied in isolated single ventricular cells of the guinea-pig. [Ca]i was varied by an intracellular perfusion technique using a suction pipette. iCa measured from internally perfused cells at a pCa lower than 9.0 was dependent on the extracellular Ca concentration ([Ca]o). Increasing [Ca]o from...

BACKGROUND AND OBJECTIVE The relationship between EEG source signals and action-related visual and auditory stimulation is still not well-understood. The objective of this study was to identify EEG source signals and their associated action-related visual and auditory responses, especially independent components of EEG. METHODS A hand-moving-Hanoi video paradigm was used to study neural corre...

Severe internal carotid artery (ICA) stenosis is a common cause of cerebrovascular accident (CVA) in middle-aged patients. Contralateral carotid occlusion (CCO) in patients with severe ICA stenosis is associated with high risk of CVA. Carotid endarterectomy (CEA) is associated with more complications in patients with CCO than those without CCO. In this study, we present the case of a 61-year-ol...

Geometric algorithms for linear independent component analysis (ICA) have recently received some attention due to their pictorial description and their relative ease of implementation. The geometric approach to ICA has been proposed first by Puntonet and Prieto [6] in order to separate linear mixtures. One major drawback of geometric algorithms is, however, an exponentially rising number of sam...

Most ICA algorithms are sensitive to outliers. Instead of robustifying existing algorithms by outlier rejection techniques, we show how a simple outlier index can be used directly to solve the ICA problem for super-Gaussian source signals. This ICA method is outlier-robust by construction and can be used for standard ICA as well as for overcomplete ICA (i.e. more source signals than observed si...