Results 31 to 40 of about 1,342,457 (294)

Coincidence summing correction for a voluminous 152Eu source

Nuclear Engineering and Technology, 2020
A code is developed to correct for the coincidence summing effect in detecting a voluminous gamma source, and this code is applied to a152Eu standard source as a test case. The source is 1000 mL of liquid in a cylindrical shape.
Eun Taek Yoon, Min Young Kang, In Jung Kim, Gwang Min Sun, Hee-Dong Choi   +4 more
doaj   +1 more source

ICEBIN: Image Contrast Enhancement Based on Induced Norm and Local Patch Approaches

IEEE Access, 2021
Traditional histogram equalization may cause degraded results of over-enhanced images under uneven illuminations. In this paper, a simple and effective image contrast enhancement method is proposed to achieve high dynamic range imaging.
Tzu-Chia Tung, Chiou-Shann Fuh
doaj   +1 more source

Liver organoids: modelling complexity in homeostasis and disease

FEBS Letters, EarlyView.
Studying liver in vitro has been challenging because simple 2D cell cultures fail to capture liver's cellular and architectural complexity. To bridge this gap, scientists increasingly use organoids, 3D liver models which better mimic liver composition and function. This review examines recent advances in liver organoid complexity and realism, discusses
Anna M. Dowbaj, Meritxell Huch
wiley   +1 more source

FCDFusion: A fast, low color deviation method for fusing visible and infrared image pairs

Computational Visual Media
Visible and infrared image fusion (VIF) aims to combine information from visible and infrared images into a single fused image. Previous VIF methods usually employ a color space transformation to keep the hue and saturation from the original visible ...
Hesong Li, Ying Fu
doaj   +1 more source

Non-Uniform-Illumination Image Enhancement Algorithm Based on Retinex Theory

Applied Sciences, 2023
To address the issues of fuzzy scene details, reduced definition, and poor visibility in images captured under non-uniform lighting conditions, this paper presents an algorithm for effectively enhancing such images.
Xiu Ji, Shuanghao Guo, Hong Zhang, Weinan Xu   +3 more
doaj   +1 more source

Correction: Gamma-Ray Observatory [PDF]

Nature, 1991
LAST month's account of the launching of the Gamma-Ray Observatory (GRO) (Nature 350,451; 1991) contained a concise and accurate description of a grazing incidence photon detector. Unfortunately, such devices work only for X-rays, and GRO has no such thing on board. The two large instruments, EGRET and COMPTEL, are based on scintil-lators.
openaire   +1 more source

Structural and biochemical analysis of a B12 superbinder

FEBS Letters, EarlyView.
BtuG proteins are vitamin B12 scavengers in Bacteroides thetaiotaomicron, a dominant human gut bacterium. We present crystal structures of three BtuG homologs bound to cobalamin and its precursor cobinamide, revealing picomolar binding affinities, among the highest known for any natural protein.
Jose M. Martinez Felices, Jacob J. Whittaker, Dirk J. Slotboom, Albert Guskov   +3 more
wiley   +1 more source

Multi-Color Channel Gamma Correction in Fringe Projection Profilometry

Photonics
Three-dimensional shape measurement plays an important role in various fields. As a way of three-dimensional measurement, fringe projection profilometry (FPP) is widely used because of its non-contact, simple structure, and high stability. One of the key
Xiang Sun, Yunpeng Zhang, Lingbao Kong, Xing Peng, Zhenjun Luo, Jie Shi, Liping Tian   +6 more
doaj   +1 more source

Fast and Efficient Visibility Restoration Technique for Single Image Dehazing and Defogging

IEEE Access, 2021
Poor weather conditions are detrimental to transportation systems and increase the likelihood of road accidents. Haze and fog are the most responsible atmospheric parameters affecting visibility and hence the traffic performance.
Apurva Kumari, Subhendu K. Sahoo, M. C. Chinnaiah   +2 more
doaj   +1 more source

The Shewanella oneidensis Fic enzyme SoFic targets the switch‐I region of EF‐Tu for AMPylation

FEBS Letters, EarlyView.
Fic enzymes mediate diverse post‐translational modifications across all domains of life, including AMPylation. Prokaryotic EF‐Tu can be AMPylated and deAMPylated by the conserved Fic enzyme SoFic. Structural and biochemical approaches were used to characterize the effect of AMPylation on EF‐Tu, SoFic's enzymatic activities, and the enzyme‐target ...
Svenja Runge, Vivian Pogenberg, Alexander Baumgart, Bente Siebels, Hartmut Schlüter, Michael Hecht‐Bucher, Aymelt Itzen   +6 more
wiley   +1 more source