Results 61 to 70 of about 947,716 (287)

Research on Fiber-Optic Optical Coherence Ranging System Based on Laser Frequency Scanning Interferometry

Sensors
In this paper, a system for absolute distance measurement is proposed based on laser frequency scanning interferometry (FSI). The system utilizes a digitally tunable laser as the light source and employs synchronized pulses to drive an analog-to-digital ...
Yingjian Zhou, Yanhong Yuan, Meixue Su
doaj   +1 more source

On measuring the absolute scale of baryon acoustic oscillations

, 2012
The baryon acoustic oscillation (BAO) feature in the distribution of galaxies provides a fundamental standard ruler which is widely used to constrain cosmological parameters.
Sutherland, Will
core   +1 more source

HST/WFPC2 observations of the LMC pulsar PSR B0540-69 [PDF]

, 2010
The study of the younger, and brighter, pulsars is important to understand the optical emission properties of isolated neutron stars. PSRB0540-69, the second brightest (V~22) optical pulsar, is obviously a very interesting target for these investigations.
A. De Luca, A. Sartori, A. Słowikowska, B. Rudak, Becker, Becker, Bignami, Boyd, Campana, Caraveo, Caraveo, Caraveo, Cardelli, Chanan, Cocke, Costa, Cusumano, De Luca, De Luca, de Plaa, Deeter, Dolphin, Dyks, Edelstein, Finley, Fitzpatrick, G. Kanbach, Gaensler, Gotthelf, Gouiffes, Hill, Hirayama, Hobbs, Holtzman, Johnston, Johnston, Kaaret, Kamae, Kanbach, Kaplan, Kern, Korpela, Lasker, Lasker, Lattanzi, Livingstone, Manchester, Manzali, Middleditch, Middleditch, Mignani, Mignani, Mignani, Mineo, Monet, Nagase, Nasuti, P. A. Caraveo, Pacini, Petre, Pétri, R. P. Mignani, Serafimovich, Seward, Shearer, Skrutskie, Takata, Trippe, Wallace, Willingale, Zacharias, Zacharias, Zhang, Ögelman   +73 more
core   +2 more sources

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

Review of low timing jitter mode-locked fiber lasers and applications in dual-comb absolute distance measurement

Nanotechnology and Precision Engineering, 2018
Passively mode-locked fiber lasers emit femtosecond pulse trains with excellent short-term stability. The quantum-limited timing jitter of a free running femtosecond erbium-doped fiber laser working at room temperature is considerably below one ...
Haosen Shi, Youjian Song, Runmin Li, Yuepeng Li, Hui Cao, Haochen Tian, Bowen Liu, Lu Chai, Minglie Hu   +8 more
doaj   +1 more source

Rapid absolute distance measurement by dynamic chirped pulse interferometry

Acta Physica Sinica, 2021
Frequency combs have given rise to revolutionary progress in a variety of applications. The absolute distance measurement by using frequency comb has been developing rapidly in recent years. In this paper, a method of rapid ranging via the dynamic chirped pulse interferometry is proposed.
Xin-Yang Xu, Hai-Han Zhao, Zhi-Wen Qian, Chao Liu, Jing-Sheng Zhai, Han-Zhong Wu   +5 more
openaire   +1 more source

Applicability of mitotic figure counting by deep learning: a development and pan‐cancer validation study

FEBS Open Bio, EarlyView.
In this study, we developed a deep learning method for mitotic figure counting in H&E‐stained whole‐slide images and evaluated its prognostic impact in 13 external validation cohorts from seven different cancer types. Patients with more mitotic figures per mm2 had significantly worse patient outcome in all the studied cancer types except colorectal ...
Joakim Kalsnes, Maria X. Isaksen, Frida Julbø, Manohar Pradhan, Andreas Kleppe, Sepp De Raedt, Ole‐Johan Skrede, Turid Torheim, John Arne Nesheim, Hans Martin Mohn, Hanne A. Askautrud, Karolina Cyll, Wanja Kildal, Emma Rewcastle, Melinda Lillesand, Vebjørn Kvikstad, Emiel Janssen, Robert Jones, Odd Terje Brustugun, Bjørn Brennhovd, Erik Skaaheim Haug, Lill‐Tove Rasmussen Busund, Elin Richardsen, Sigve Andersen, Tom Dønnem, Kristina Lindemann, Gunnar Kristensen, Neil A. Shepherd, Marco Novelli, Knut Liestøl, David Kerr, Håvard E. Danielsen, Tarjei S. Hveem   +32 more
wiley   +1 more source

Compensation of Frequency Drift in Frequency-Sweep Polarization-Modulation Ranging System

Applied Sciences, 2019
In frequency-sweep polarization-modulation ranging, distance is determined by the frequency of modulated waves and the corresponding wavelength multiple when emitted and returned waves are in phase.
Shuyuan Gao, Rongyi Ji, Yao Li, Chun Liu, Junkai Shi, Yingling Pan, Weihu Zhou   +6 more
doaj   +1 more source

Similarity evaluation of stratum anti-drilling ability and a new method of drill bit selection

Petroleum Exploration and Development, 2021
Considering the stratum anti-drilling ability, drill bit working conditions, drill bit application effect and drill bit economic benefits, the similarity of stratum anti-drilling ability was evaluated by grey relational analysis theory to screen out ...
Tie YAN, Rui XU, Wenfeng SUN, Weikai LIU, Zhaokai HOU, Yuan YUAN, Yang SHAO   +6 more
doaj   +1 more source

Single‐molecule DNA flow‐stretch assays for high‐throughput DNA–protein interaction studies

FEBS Open Bio, EarlyView.
We describe an optimised single‐molecule DNA flow‐stretch assay that visualises DNA–protein interactions in real time. Linear DNA fragments are tethered to a surface and stretched by buffer flow for fluorescence imaging. Using λ and φX174 DNA, this protocol enhances reproducibility and accessibility, providing a versatile approach for studying diverse ...
Ayush Kumar Ganguli, Mohammad Nour Alsamsam, Ugnė Bagdonaitė, Van Truc Vu, Chun‐Jen Huang, Polina Kuzhir, Mindaugas Zaremba, Aurimas Kopūstas, Marijonas Tutkus   +8 more
wiley   +1 more source