OBJECTIVE The aim of this study was to compare the outcomes of dorsal onlay urethroplasty using buccal mucosa graft (BMG) versus penile skin flap (PSF) in the repair of long anterior urethral strictures. MATERIAL AND METHODS Patients with long anterior urethral strictures were randomized to receive either dorsal onlay BMG urethroplasty or PSF urethroplasty. All patients were evaluated preoper...

In this work, a unified model, based on a thorough analysis of experimental data, is developed for the overall Modulation Transfer Function (MTF) estimation for CMOS image sensors. The model covers the physical diffusion effect together with the impact of the pixel active area geometrical shape. Comparison of both, our predicted results and the MTF calculated from the Point Spread Function (PSF...

A blind single-image super resolution method is proposed to enhance the spatial resolution of the image with defocus blur. Firstly, according to the low resolution imaging model, a framework of blind singleimage super resolution reconstruction is presented. Secondly, utilizing Wiener filtering algorithm, the errorparameter curve of the defocus blurred image was generated, through which the defo...

Motion blur is a typical and common degradation in surveillance system. The problem of motion estimation based on super resolution reconstruction of multiple images is addressed in this paper. This paper presents a motion projection onto convex set (POCS) algorithm to restore an image from multiple blurred images. The inter and intra pixel shifts are used to compute a joined point spread functi...

Several lines of evidence indicated that P cell-stimulating factor (PSF), a T lymphocyte-derived lymphokine known to stimulate the growth of hemopoietic stem and progenitor cells, also acted on macrophages. PSF was absorbed from medium that had been mixed for two hours at 0 ‘C with either resident or thioglycollate-elicited peritoneal cells, suggesting the presence of receptors for PSF on cells...

In this paper, we have proposed an Alternate Minimization (AM) algorithm for estimating the Point-Spread Function (PSF) of a Confocal Laser Scanning Microscope (CLSM) and the specimen fluorescence distribution. A 3-D separable Gaussian model is used to restrict the PSF solution space and a constraint on the specimen is used so as to favor the stabilization and convergence of the algorithm. The ...

In many imaging systems, the point spread function (PSF) is non-stationary. Usually a computation-intensive iterative algorithm is used to de-blur the non-stationary PSF. This paper presents a new idea of using a non-iterative method to compensate for the spatially variant PSF. This method first further blurs the image with a non-stationary kernel so that the resultant image has a stationary PS...

We propose an alternate minimization algorithm for estimating the point-spread function (PSF) of a confocal laser scanning microscope and the specimen fluorescence distribution. A three-dimensional separable Gaussian model is used to restrict the PSF solution space and a constraint on the specimen is used so as to favor the stabilization and convergence of the algorithm. The results obtained fr...

BACKGROUND IbeA-induced NF-κB signaling through its primary receptor vimentin as well as its co-receptor PSF is required for meningitic E. coli K1 penetration and leukocyte transmigration across the blood-brain barrier (BBB), which are the hallmarks of bacterial meningitis. However, it is unknown how vimentin and PSF cooperatively contribute to IbeA-induced cytoplasmic activation and nuclear tr...

An insulin-like growth factor (IGF) I response element (IGFRE) in the porcine P-450 cholesterol side-chain cleavage gene (P450scc) regulates transcription through the binding of two proteins, Sp1 and polypyrimidine tract-binding protein-associated splicing factor (PSF). PSF is a component of spliceosomes and contains RNA-binding domains. In this study, we localized the NH2-terminal amino acid r...