Recently, LSI (Latent Semantic Indexing) based on SVD (Singular Value Decomposition) is proposed to overcome the problems of polysemy and homonym in traditional lexical matching. However, it is usually criticized as with low discriminative power for representing documents although it has been validated as with good representative quality. In this paper, SVD on clusters is proposed to improve th...

This paper discusses an SVD-based signal enhancement procedure, applied to noise reduction in multi-microphone speech signals. The SVD-based signal enhancement procedure amounts to a specific optimal filtering problem when the so-called ‘desired response’ signal cannot be observed. The optimal filter can then be written as a function of the generalized singular vectors and singular values of a ...

PURPOSE Ocular toxoplasmosis is associated with vitreoretinal complications that can potentially cause severe visual loss. The aim of this study is to report the preoperative, intraoperative, and postoperative outcomes of vitreous surgery in eyes with vitreoretinal complications secondary to ocular toxoplasmosis. METHODS This retrospective study included 15 eyes of 15 patients (8 men, 7 women...

PURPOSE The purpose of this study was to compare images of the retina and choroid obtained with Spectralis 1050-nm spectral-domain optical coherence tomography (SD-OCT) with and without enhanced depth imaging (EDI) to the commercially available 870-nm SD-OCT with and without EDI. METHODS Full-length 30° line scans were obtained with both 870- and 1050-nm Spectralis OCT instruments, with and w...

Purpose. To investigate the effect of menstrual cycle on perioperative bleeding of primary vitreoretinal surgery. Methods. Data on female patients who had vitrectomy surgery was retrospectively collected. Exclusion criteria were history of trauma, vitreous hemorrhage, previous vitreoretinal surgery, diabetic retinopathy, endophthalmitis, acute retinal necrosis, single vitreous opacity, and use ...

PURPOSE To determine whether long-term brimonidine (BRI) treatment prevents the hyperglycemia-induced increase in vitreoretinal vascular endothelial growth factor (VEGF) expression and breakdown of the blood-retinal barrier (BRB) in streptozotocin (STZ)-induced diabetic rats. METHODS Brown Norway/Long-Evans rats were divided into three groups with similar distributions of blood glucose and bo...