Results 71 to 80 of about 970,714 (298)

Background Subtraction Approach Based on Independent Component Analysis

Sensors, 2010
In this work, a new approach to background subtraction based on independent component analysis is presented. This approach assumes that background and foreground information are mixed in a given sequence of images.
Hugo Jiménez-Hernández
doaj   +1 more source

Structural biology of ferritin nanocages

FEBS Letters, EarlyView.
Ferritin is a conserved iron‐storage protein that sequesters iron as a ferric mineral core within a nanocage, protecting cells from oxidative damage and maintaining iron homeostasis. This review discusses ferritin biology, structure, and function, and highlights recent cryo‐EM studies revealing mechanisms of ferritinophagy, cellular iron uptake, and ...
Eloise Mastrangelo, Flavio Di Pisa
wiley   +1 more source

Human Pose Estimation by Exploiting Spatial and Temporal Constraints in Body-Part Configurations

IEEE Access, 2017
We present an algorithm for estimating a sequence of articulated upper-body human pose in unconstrained videos. Most previous work often fails to locate forearms in those video scenes suffering from illumination varieties, background clutter, camera ...
Qingwu Li, Feijia He, Tian Wang, Liangji Zhou, Shuya Xi   +4 more
doaj   +1 more source

Ghost Detection and Removal Based on Two-Layer Background Model and Histogram Similarity

Sensors, 2020
Detecting and removing ghosts is an important challenge for moving object detection because ghosts will remain forever once formed, leading to the overall detection performance degradation. To deal with this issue, we first classified the ghosts into two
Yiping Xu, Hongbing Ji, Wenbo Zhang
doaj   +1 more source

Real-Time Predictive Modeling and Robust Avoidance of Pedestrians with Uncertain, Changing Intentions

, 2014
To plan safe trajectories in urban environments, autonomous vehicles must be able to quickly assess the future intentions of dynamic agents. Pedestrians are particularly challenging to model, as their motion patterns are often uncertain and/or unknown a ...
CE Rasmussen, D Helbing, D Vasquez, GS Aoude, J Joseph, JP How, M Basseville, M Bennewitz, Q Zhu, T Bandyopadhyay   +9 more
core   +1 more source

A methionine‐lined active site governs carbocation stabilization and product specificity in a bacterial terpene synthase

FEBS Letters, EarlyView.
This study reveals a unique active site enriched in methionine residues and demonstrates that these residues play a critical role by stabilizing carbocation intermediates through novel sulfur–cation interactions. Structure‐guided mutagenesis further revealed variants with significantly altered product profiles, enhancing pseudopterosin formation. These
Marion Ringel, Carl P. O. Helmer, Shani Zev, Ronja Driller, Emily Buhr, Markus Reinbold, Renana Schwartz, Gabriel Foley, Mikael Boden, Daniel Garbe, Gerhard Schenk, Dan Thomas Major, Bernhard Loll, Thomas Brück   +13 more
wiley   +1 more source

A Flexible and Stretchable MXene/Waterborne Polyurethane Composite-Coated Fiber Strain Sensor for Wearable Motion and Healthcare Monitoring

Sensors
Fiber-based flexible sensors have promising application potential in human motion and healthcare monitoring, owing to their merits of being lightweight, flexible, and easy to process.
Junming Cao, Yuanqing Jiang, Xiaoming Li, Xueguang Yuan, Jinnan Zhang, Qi He, Fei Ye, Geng Luo, Shaohua Guo, Yangan Zhang, Qi Wang   +10 more
doaj   +1 more source

Movement-in-a-Video Detection Scheme for Sign Language Gesture Recognition Using Neural Network

Applied Sciences, 2022
Sign language aids in overcoming the communication barrier between hearing-impaired individuals and those with normal hearing. However, not all individuals with normal hearing are skilled at using sign language.
Angela C. Caliwag, Han-Jeong Hwang, Sang-Ho Kim, Wansu Lim   +3 more
doaj   +1 more source

Cooling to the Ground State of Axial Motion for One Atom Strongly Coupled to an Optical Cavity [PDF]

, 2006
Localization to the ground state of axial motion is demonstrated for a single, trapped atom strongly coupled to the field of a high finesse optical resonator.
A. Boca, A. D. Boozer, A. S. Parkins, B. G. Englert, H. J. Kimble, H.-J. Briegel, R. Miller, S. Haroche, T. E. Northup   +8 more
core   +2 more sources

Principles of visual motion detection [PDF]

Trends in Neurosciences, 1989
Motion information is required for the solution of many complex tasks of the visual system such as depth perception by motion parallax and figure/ground discrimination by relative motion. However, motion information is not explicitly encoded at the level of the retinal input. Instead, it has to be computed from the time-dependent brightness patterns of
Borst, Alexander, Egelhaaf, Martin
openaire   +4 more sources