Results 41 to 50 of about 2,574,547 (240)

Polarization-Enhanced Underwater Detection Method for Multiple Material Targets Based on Deep-Learning

IEEE Photonics Journal, 2023
Underwater target detection is an essential topic in the applications of underwater exploration. However, underwater target detection faces serious challenges, such as complex scattering, low visibility, and target clutter.
Guochen Wang, Jie Gao, Yubin Chen, Xin Wang, Jiangtao Li, Khian-Hooi Chew, Rui-Pin Chen   +6 more
doaj   +1 more source

Polarization‐resolved femtosecond Vis/IR spectroscopy tailored for resolving weak signals in biological samples using minimal sample volume

FEBS Open Bio, EarlyView.
Unique biological samples, such as site‐specific mutant proteins, are available only in limited quantities. Here, we present a polarization‐resolved transient infrared spectroscopy setup with referencing to improve signal‐to‐noise tailored towards tracing small signals. We provide an overview of characterizing the excitation conditions for polarization‐
Clark Zahn, Karsten Heyne
wiley   +1 more source

Optically controlled grippers for manipulating micron-sized particles [PDF]

, 2007
We report the development of a joystick controlled gripper for the real-time manipulation of micron-sized objects, driven using holographic optical tweezers (HOTs).
Barron, L., Padgett, Miles, Miles Padgett, Beck, F., Louise Barron, Gibson, G., Gibson, Graham, Fiona Beck, Whyte, G., Graham Gibson, Padgett, M., Graeme Whyte, Beck, Fiona, Whyte, Graeme, Barron, Louise   +14 more
core   +1 more source

Non-Line-of-Sight Target Tracking With a Single Time Multiplexed Channel

IEEE Photonics Journal
Here we propose a non-line-of-sight (NLOS) tracking scheme using only one single-pixel single-photon channel. It is demonstrated that sending multiple beams with proper time delay enables multiplexing of multi-echoes of the hidden object in the single ...
Xianmin Zheng, Tailin Li, Ke Ding, Yihan Luo   +3 more
doaj   +1 more source

A light‐triggered Time‐Resolved X‐ray Solution Scattering (TR‐XSS) workflow with application to protein conformational dynamics

FEBS Open Bio, EarlyView.
Time‐resolved X‐ray solution scattering captures how proteins change shape in real time under near‐native conditions. This article presents a practical workflow for light‐triggered TR‐XSS experiments, from data collection to structural refinement. Using a calcium‐transporting membrane protein as an example, the approach can be broadly applied to study ...
Fatemeh Sabzian‐Molaei, Fredrik Orädd, Konstantinos Magkakis, Magnus Andersson   +3 more
wiley   +1 more source

Analysing the significance of small conformational changes and low occupancy states in serial crystallographic data

FEBS Open Bio, EarlyView.
This protocol paper outlines methods to establish the success of a time‐resolved serial crystallographic experiment, by means of statistical analysis of timepoint data in reciprocal space and models in real space. We show how to amplify the signal from excited states to visualise structural changes in successful experiments.
Jake Hill, Yelyzaveta Pulnova, Elke De Zitter, Helen M. Ginn, Briony A. Yorke   +4 more
wiley   +1 more source

Advanced photonic methodologies for the 'in vitro' manipulation of cellular systems [PDF]

, 2011
This thesis investigates the application of a variety of optical techniques for the manipulation of single cells and their local micro-environment. The methodologies developed provide enhanced control over a single cell under study affording exquisite
McDougall, Craig
core   +2 more sources

Longitudinally continuous varying high-order cylindrical vector fields enabled by spin-decoupled metasurfaces

Nanophotonics
The manipulation of vector optical fields in three-dimensional (3D) space plays a vital role in both fundamental research and practical implementations of polarization optics.
He Xinye, Bao Hanlin, Zhang Fei, Kang Tongtong, Pu Mingbo, Chen Yan, Guo Yinghui, Gong Jintao, Xu Mingfeng, Luo Xiangang   +9 more
doaj   +1 more source

Low Altitude UAV Detection in Complex Contexts

IEEE Access
With the rapid development of drone technology and its widespread application in various fields, low-altitude drone detection has become an important technological approach for ensuring public safety and implementing effective supervision.
Zhengwei Tang, Wen Lu, Weihua Tang, Dong He, Yongmei Huang, Qiang Wang   +5 more
doaj   +1 more source

Molecular characterization of covRS mutations in M1UK Streptococcus pyogenes

FEBS Open Bio, EarlyView.
Group A Streptococcus (GAS) acquires covRS mutations driving a hypervirulent bacterial state, frequently associated with invasive disease‐like necrotizing fasciitis. We demonstrate that the newly emerged M1UK GAS lineage can also acquire these mutations.
Jarrad Pritchard, Emma‐Jayne Proctor, Jiawa Wang, Nikolas P. Johnston, Andrew Hayes, Georgia McCorkell, Haibo Yu, Jai Tree, Mark R. Davies, Mark J. Walker, Ronald Sluyter, Stephan Brouwer, Martina L. Sanderson‐Smith   +12 more
wiley   +1 more source