High organic materials in palm oil mill effluent (POME) can result serious water pollution. To date, biological treatment has been used to reduce the environmental risks of these effluents prior their discharge into streams. However, effluents’ dark brownish colour remains as a significant issue that must be addressed, it affects overall quality water. Although membrane technology frequently ad...

Cosmic shear requires high precision measurement of galaxy shapes in the presence of the observational point spread function (PSF) that smears out the image. The PSF must therefore be known for each galaxy to a high accuracy. However, for several reasons, the PSF is usually wavelength dependent; therefore, the differences between the spectral energy distribution of the observed objects introduc...

This paper proposes a new deconvolution method for 3D fluorescence wide-field microscopy. Most previous methods are insufficient in terms of restoring a 3D cell structure, since a point spread function (PSF) is simply assumed as depth-invariant, whereas a PSF of microscopy changes significantly along the optical axis. A few methods that consider a depth-variant PSF have been proposed; however, ...

{ Wavefront correction by adaptive optics is often only partial and the image of a point-like source consists of a coherent peak superposed on a diiuse halo. If the point-spread function (PSF) is known, the object can be restored by deconvolution techniques. This PSF depends, however, strongly on atmospheric conditions which are variable and on the wavefront sensor reference source. For this re...

BACKGROUND PET image reconstruction methods include modeling of resolution degrading phenomena, often referred to as point-spread function (PSF) reconstruction. The aim of this study was to develop a clinically relevant phantom and characterize the reproducibility and accuracy of high-resolution PSF reconstructed images of small lesions, which is a prerequisite for using PET in the prediction a...

Nonsolvent-induced phase separation (NIPS) is widely used to prepare asymmetric gas membranes. Most industrial NIPS casting solution formulations are limited a small group of glassy polymers and, importantly, require toxic polar aprotic solvents such as N,N-dimethylacetamide (DMAc), N,N-dimethylformamide (DMF), or N-methyl-2-pyrrolidone (NMP). Growing restrictions on the use spurring search for...

In this paper we propose new blur identi cation algorithm based on singular value decomposition (SVD) of degraded image. An unknown space-invariant point-spread function (PSF) is also decomposed using SVD. Magnitude functions of PSF singular vectors (left and right) are identi ed using averaged spectra of corresponding singular vectors of degraded image. Phase functions of PSF singular vectors ...

Context. Controlling shape measurement systematics in weak gravitational lensing. Aims. Quantifying the effect of systematic errors in modelling the Point Spread Function (PSF) on cosmological parameter measurements from cosmic shear. Methods. We explore the impact of PSF fitting errors on cosmic shear measurements using the concepts of complexity and sparsity. Complexity, introduced in a previ...

BACKGROUND Fatigue is common in stroke survivors. Lesion location may influence the risk of poststroke fatigue (PSF) but it is uncertain whether location has an impact on the prognosis of PSF. This study examined the association between PSF outcome and infarct location. METHODS The study sample comprised 435 Chinese patients with acute ischemic stroke admitted to the acute stroke unit of a un...