Results 71 to 80 of about 59,731 (197)

Stellar intensity interferometry over kilometer baselines: Laboratory simulation of observations with the Cherenkov Telescope Array

, 2014
A long-held astronomical vision is to realize diffraction-limited optical aperture synthesis over kilometer baselines. This will enable imaging of stellar surfaces and their environments, show their evolution over time, and reveal interactions of stellar
Dravins, Dainis, Lagadec, Tiphaine
core   +1 more source

Gravitational Wave (GW) Classification, Space GW Detection Sensitivities and AMIGO (Astrodynamical Middle-frequency Interferometric GW Observatory) [PDF]

, 2017
After first reviewing the gravitational wave (GW) spectral classification. we discuss the sensitivities of GW detection in space aimed at low frequency band (100 nHz-100 mHz) and middle frequency band (100 mHz-10 Hz).
Ni, Wei-Tou
core   +3 more sources

Glutamine Deprivation Triggers Tribbles Homolog 3 Dependent G‐Quadruplex Resolution to Maintain DNA Repair and Tumor Survival

Advanced Science, EarlyView.
Glutamine deprivation triggers transient DNA damage yet activates adaptive repair in hepatocellular carcinoma cells. We identify TRIB3 as a stress‐induced nuclear scaffold that associates with DDX5 and G‐quadruplex DNA atBRCA1 andRAD51AP1 promoters. TRIB3 loss increases G4 accumulation, suppresses HR gene transcription, elevates γ‐H2A.X, and sensitizes
Qiang Ji, Xuedan Sun, Zhangran Sun, Mengfan Li, Xinyu Cheng, Shuai Tian, Rick F. Thorne, Jinming Li, Guangzhi Liu, Mian Wu, Xiaoying Liu   +10 more
wiley   +1 more source

A Compact Laser Imaging System for Concurrent Reflectance Confocal Microscopy and Laser Doppler Flowmetry

IEEE Photonics Journal, 2016
We propose a compact laser feedback interferometry imaging system for concurrent reflectance confocal microscopy and laser Doppler flowmetry. This system acquires both confocal reflectance and Doppler signals in a confocal architecture to image dynamic ...
Alireza Mowla, Thomas Taimre, Yah Leng Lim, Karl Bertling, Stephen J. Wilson, Tarl W. Prow, Aleksandar D. Rakic   +6 more
doaj   +1 more source

Ultrathin‐Gold‐Resonators‐Enabled Bolometers with High Linearity, Responsivity, and Repeatability

Advanced Science, EarlyView.
This work demonstrates ultrathin gold nanomechanical resonators operating in HF/VHF bands, unveiling their potential for laser power sensing. By exploiting frequency shifts resulting from laser‐induced thermal tension, these devices can function as sensitive nanoscale bolometers, with outstanding linearity, responsivity, and repeatability. The findings
Jiaqi Wu, Luming Wang, Jing Yu, Chenfei Lv, Ziluo Su, Jiaze Qin, Bo Xu, Kuai Yu, Jiankai Zhu, Zenghui Wang   +9 more
wiley   +1 more source

Novel Principle of Contactless Gauge Block Calibration

Sensors, 2012
In this paper, a novel principle of contactless gauge block calibration is presented. The principle of contactless gauge block calibration combines low-coherence interferometry and laser interferometry.
Ondřej Číp, Josef Lazar, Martin Čížek, Břetislav Mikel, Zdeněk Buchta, Šimon Řeřucha   +5 more
doaj   +1 more source

Cells Dynamically Adapt Their Nuclear Volumes and Proliferation Rates During Single to Multicellular Transitions

Advanced Science, EarlyView.
It is currently not well understood how cells regulate basic properties, e.g., volume and mechanics within dense multicellular environments like tumors. Here, we show that different cell types of cancer and also normal cells largely decrease their nuclear and cellular volumes in emerging cell clusters and that this is partly driven by cell cycle shifts.
Vaibhav Mahajan, Keshav Gajendra Babu, Markus Mukenhirn, Antje Garside, Vinita Ajit Kini, Trishla Adhikari, Timon Beck, Byung Ho Lee, Kyoohyun Kim, Carsten Werner, Raimund Schlüßler, Alf Honigmann, Sebastian Aland, Anna Verena Taubenberger   +13 more
wiley   +1 more source

Representation-free description of light-pulse atom interferometry including non-inertial effects

, 2015
Light-pulse atom interferometers rely on the wave nature of matter and its manipulation with coherent laser pulses. They are used for precise gravimetry and inertial sensing as well as for accurate measurements of fundamental constants.
Kajari, Endre, Kleinert, Stephan, Roura, Albert, Schleich, Wolfgang P.   +3 more
core   +1 more source

Characterization of digital dispersive spectrometers by low coherence interferometry [PDF]

, 2017
We propose a procedure to determine the spectral response of digital dispersive spectrometers without previous knowledge of any parameter of the system.
Izquierdo, J. G., Martínez Matos, Ó., Rickenstorff, C., Vaveliuk, Pablo, Zamora, S.   +4 more
core   +2 more sources

Ultraviolet Photodetectors Based on 4H‐SiC With Honeycomb‐Like Light‐Trapping Structures

Advanced Science, EarlyView.
A facile photoelectrochemical etching method creates honeycomb‐like light‐trapping microstructures on SiC. These microstructures suppress UV reflection and enhance absorption by extending the optical path and facilitating multiple internal reflections, while strengthening the local electric field.
Huifan Xiong, Xiliang Luo, Qunsi Yang, Yibo Hu, Jieshi Chen, Lihui Song, Deren Yang, Xiaodong Pi   +7 more
wiley   +1 more source