Results 51 to 60 of about 286,343 (348)

Wavelength-Scale Imaging of Trapped Ions using a Phase Fresnel lens [PDF]

, 2011
A microfabricated phase Fresnel lens was used to image ytterbium ions trapped in a radio frequency Paul trap. The ions were laser cooled close to the Doppler limit on the 369.5 nm transition, reducing the ion motion so that each ion formed a near point ...
A. Jechow, Amini, B. G. Norton, Bakr, Biercuk, Chapman, Chou, Cirac, D. Kielpinski, Deslauriers, Duan, E. W. Streed, García-Ripoll, Gerritsma, Hadden, Harlander, James, Kielpinski, Kielpinski, Kielpinski, Leger, Leibfried, M. J. Petrasiunas, Maiwald, Neuhauser, Nägerl, Shu, Sondermann, Streed, Streed, Streed, Vahala   +31 more
core   +2 more sources

Wafer‐Scale Integration of α‐quartz Thin Films toward Super High Frequency Piezoelectric bioNEMS for Chikungunya Virus Detection

Advanced Functional Materials, EarlyView.
Epitaxial piezoelectric α‐quartz/Si BioNEMS sensors, made using soft chemistry, effectively detect the Chikungunya virus. They have a mass sensitivity of 205 pg Hz−1 in liquid and can detect the virus at a limit of 9 ng mL−1. This development enables high‐frequency mass devices for point‐of‐care testing in healthcare and other electronic applications ...
Raissa Rathar, Sijie Ding, David Sanchez‐Fuentes, Claire Jolly, Charlotte André‐Arpin, Rudy Desgarceaux, Nicolas Guillaume, Gustavo Ardila, Ricardo Garcia‐Bermejo, Jaume Gazquez, Sergi Plana‐Ruiz, Laura Picas, Adrian Carretero‐Genevrier   +12 more
wiley   +1 more source

Single camera 3D planar Doppler velocity measurements using imaging fibre bundles [PDF]

, 2006
Two frequency planar Doppler Velocimetry (2ν-PDV) is a modification of the Planar Doppler Velocimetry (PDV) method that allows velocity measurements to be made, quickly and non intrusively, across a plane defined by a laser light sheet.
Charrett, Thomas O. H., Ford, Helen D., Tatam, Ralph P.   +2 more
core   +1 more source

The Realization of Multidirectional, Free‐Standing 3D Plasmonic Nanostructures via 3D Nanoprinting: A Case Study of Fractal Antennas

Advanced Functional Materials, EarlyView.
Free‐standing plasmonic gold‐based fractal antennas are fabricated by 3D nanoprinting, employing focused electron beam induced deposition and an optimized purification method to remove carbon while conserving structural fidelity. Simulation and experiment show broadband plasmonic activity, including customizable polarizability, thereby paving the way ...
Verena Reisecker, Robert Winkler, Ulrich Hohenester, Evelin Fisslthaler, Daniel Knez, Gerald Kothleitner, Georg Haberfehlner   +6 more
wiley   +1 more source

Multibeam single frequency synthetic aperture radar processor for imaging separate range swaths [PDF]

, 1982
A single-frequency multibeam synthetic aperture radar for large swath imaging is disclosed. Each beam illuminates a separate ""footprint'' (i.e., range and azimuth interval).
Jain, A.
core   +1 more source

Hepatic artery thrombosis after liver transplantation: Radiologic evaluation [PDF]

, 1986
Hepatic artery thrombosis after liver transplantation is a devastating event requiring emergency retransplantation in most patients. Early clinical signs are often nonspecific.
Bowen, A, Bron, KM, Penkrot, RJ, Segel, MC, Skolnick, ML, Starzl, TE, Zajko, AB   +6 more
core   +1 more source

Forward-looking Multi-channel Synthetic Aperture Radar Imaging and Array Attitude Error Compensation

Leida xuebao, 2023
To solve the problem of left-right Doppler ambiguity in forward-looking Synthetic Aperture Radar (SAR) imaging, Forward-Looking Multi-Channel SAR (FLMC-SAR) can achieve Doppler ambiguity resolving imaging through beamforming.
Xinshuo WANG, Jingyue LU, Zhichao MENG, Lei ZHANG   +3 more
doaj   +1 more source

A Single‐Metal‐Doped Nanoplatform for Ferroptosis‐Driven cGAS‐STING Pathway Activation in Hepatocellular Carcinoma Immunotherapy

Advanced Functional Materials, EarlyView.
The cGAS‐STING pathway boosts HCC antitumor immunity but lacks specific activation. Nanoplatform ZMRPF induces HCC ferroptosis via lipid ROS, releasing mtDNA. It synergizes with ZMRPF‐released Mn2⁺ to activate cGAS‐STING, amplifies antigen‐presenting cell activity, reverses HCC immunosuppression, and enables robust systemic antitumor immunity ...
Yuchen Zhang, Shuang Feng, Jie Luo, Kaige Xu, Junfeng Guo, Xingyue Zhang, Mengxue Yuan, Qiang Luo, Yu Huang, Chaoqiang Fan, Kibret Mequanint, Donghui Zhu, Malcolm Xing, Shiming Yang   +13 more
wiley   +1 more source

Doppler images of II Pegasi for 2004-2010 [PDF]

, 2012
Aims. We study the spot activity of II Peg during the years 2004-2010 to determine long- and short-term changes in the magnetic activity. In a previous study, we detected a persistent active longitude, as well as major changes in the spot configuration ...
Berdyugina, Berdyugina, Berdyugina, Berdyugina, Doyle, Frasca, Frasca, Gustafsson, Hackman, I. Ilyin, I. Tuominen, Jeffers, Järvinen, Kitchatinov, Korhonen, Kupka, Lehtinen, Lindborg, M. J. Mantere, M. Lindborg, Makarov, Mohin, Moss, N. Piskunov, O. Kochukhov, Ottmann, Rodonò, Roettenbacher, Siwak, T. Hackman, Tuominen, Vogt   +31 more
core   +1 more source

The imaging algorithm in the optimal range FrFT domain based on Doppler parameters [PDF]

AIP Advances
In view of the error impact of Doppler parameters estimation on SAR imaging performance, this paper constructs the energy focusing axis based on the optimal rotation angle in the optimal range FrFT (fractional Fourier transform) domain.
Z. L. Wang, Y. Xu, J. Y. Liu, G. L. Gao
doaj   +1 more source