We develop and present effective PSFs for the F606W filter in the WFC, and then for five other filters. After briefly reviewing the concept of the effective PSF, we show that the WFC PSF varies with position in the detector. We represent the PSF by a 9×10 array of fiducial PSFs, between which a tailor-made PSF is to be interpolated for each star. Fitting these PSFs to star images gives photomet...

Piriform sinus fistula (PSF) is a rare branchial anomaly that causes repetitive acute suppurative thyroiditis or deep neck abscess. The definitive treatment of PSF is open neck surgery. However, such surgery has a cosmetic problem and a high risk of recurrence. Furthermore, identifying the fistula is difficult due to previous repetitive infections. We report a case of esophageal submucosal absc...

We describe the corkscrew point spread function (PSF), which can localize objects in three dimensions throughout a 3.2 μm depth of field with nanometer precision. The corkscrew PSF rotates as a function of the axial (z) position of an emitter. Fisher information calculations show that the corkscrew PSF can achieve nanometer localization precision with limited numbers of photons. We demonstrate ...

Imaging with a layered superlens is a spatial filtering operation characterized by the point spread function (PSF). We show that in the same optical system the image of a narrow subwavelength Gaussian incident field may be surprisingly dissimilar to the PSF, and the width of the PSF is not a straightforward measure of the resolution. The FWHM or standard deviation of the PSF gives ambiguous inf...

Richardson-Lucy (RL) deconvolution is one of the classical methods widely used in X-ray astronomy and other areas. Amid recent progress image processing, RL still leaves much room for improvement under a realistic situations. One direction to include positional dependence point-spread function (PSF), so-called with spatially variant PSF (RL$_{\rm{sv}}$). Another method estimating reliable numbe...

Neurology 2012;79:1414–1415 Pathologic fatigue is common in neurologic disorders and can be defined as “a state of weariness unrelated to previous exertion levels which is usually not ameliorated by rest.”1 A case definition for poststroke fatigue (PSF) has been developed,2 based on this definition,1 to identify clinically important fatigue in stroke survivors.2 The frequency of PSF ranges from...

Spectroscopic analysis and atomic force microscopy (AFM) phase imaging studies show self-assembly of phenosafranin (PSF) to multiwalled carbon nanotubes (MWNTs). The shift in absorption spectra is associated with charge transfer of valence electrons from PSF to electron accepting sites on the MWNTs. The Raman-active disorder modes are used to fingerprint PSF attachment to MWNTs via defect state...

The 5' UTR of Coxsackievirus B3 (CVB3) contains internal ribosome entry site (IRES), which allows cap-independent translation of the viral RNA and a 5'-terminal cloverleaf structure that regulates viral replication, translation and stability. Here, we demonstrate that host protein PSF (PTB associated splicing factor) interacts with the cloverleaf RNA as well as the IRES element. PSF was found t...

BACKGROUND AND PURPOSE A stroke event is often characterized by a number of debilitating consequences that may impact negatively on the health-related quality of life (HRQL) of survivors. This study examined the impact of poststroke fatigue (PSF), a persistent and prevalent stroke consequence, on HRQL of Nigerian stroke survivors. METHODS One hundred stroke survivors were recruited from the p...

Designed PSF Zhiwei Zhou, Dayong Wang Applied Science, Beijing University of Technology, Beijing, 100124, P.R.China Juan Zhao, Yuhong Wan, Zhuqing Jiang, Shiquan Tao Applied Science, Beijing University of Technology, Beijing, 100124, P.R.China Abstract The digital post-processing method is needed to restore the image quality from the blurring image output directly from optical sparse aperture i...