Results 51 to 60 of about 5,323,059 (392)

Blazar sequence - an artefact of Doppler boosting

, 2008
The blazar sequence is a scenario in which the bolometric luminosity of the blazar governs the appearance of its spectral energy distribution. The most prominent result is the significant negative correlation between the synchrotron peak frequencies and ...
Antón, Blandford, Caccianiga, Donato, E. Nieppola, E. Valtaoja, Fossati, Ghisellini, Ghisellini, Guerra, Güijosa, Jorstad, Lähteenmäki, M. Kotiranta, M. Tornikoski, Nieppola, Nieppola, Padovani, Padovani, Padovani, Padovani, Padovani, Perlman, Pian, Readhead, Salonen, T. Hovatta, Takahashi, Teräsranta, Teräsranta, Teräsranta, Teräsranta, Verkhodanov, Wall, Wu   +34 more
core   +1 more source

Photonic approach for simultaneous measurements of Doppler-frequency-shift and angle-of-arrival of microwave signals.

Optics Express, 2019
A photonic method used to simultaneously measure the Doppler-frequency-shift (DFS) and angle-of-arrival (AOA) of microwave signals is proposed and experimentally demonstrated.
Peng Li, Lianshan Yan, Jia Ye, Xian-gui Feng, W. Pan, B. Luo, X. Zou, Tao Zhou, Zhiyu Chen   +8 more
semanticscholar   +1 more source

Frequency-domain waveform approximants capturing Doppler shifts [PDF]

, 2018
Gravitational wave astrophysics has only just begun, and as current detectors are upgraded and new detectors are built, many new, albeit faint, features in the signals will become accessible.
Chamberlain, Katie, Gerosa, Davide, Moore, Christopher J., Yunes, Nicolas   +3 more
core   +4 more sources

Assessment of Pain Types in Recently Diagnosed Patients With Inflammatory Arthritis

Arthritis Care &Research, EarlyView.
Objective Up to 40% of patients with inflammatory arthritis (IA) experience persistent pain, traditionally thought to be associated with a shift from peripherally to centrally mediated pain during the disease course in some patients. We assessed sensory profiles of recently diagnosed individuals with IA, hypothesizing that pain reported at this early ...
Zoe Rutter‐Locher, Sam Norton, Joseph L. Taylor, Bina Menon, Tom Esterine, Ruth Williams, Leonie S. Taams, Kirsty Bannister, Bruce W. Kirkham   +8 more
wiley   +1 more source

Photonic high-fidelity storage and Doppler frequency shift of broadband RF pulse signals.

Optics Express, 2019
A microwave photonic system which can simultaneously realize the functions of rapidly tunable Doppler frequency shift (DFS) and high fidelity storage of broadband RF signals is proposed and verified.
Zhidan Ding, Fei Yang, Jiejun Zhao, Ruixia Wu, H. Cai, Mingjun Wang, Yongxiang Weng, Zixin Zhao   +7 more
semanticscholar   +1 more source

Patterned Assembly of Transition Metal Dichalcogenide/Graphene Heterostructures via Direct Laser Writing

Advanced Functional Materials, EarlyView.
The fabrication of patterned transition metal dichalcogenide (TMD)/graphene heterostructures via direct laser writing reveals new interface chemistry and enables efficient, customizable assembly. Selective laser irradiation of functionalized TMD/graphene triggers localized reactions, forming chemically modified interfaces.
Xin Chen, Stefan Wolff, Sofiia Zuieva, Robert Schusterbauer, Rida Shaikh, Christian E. Halbig, Anton Habel, Roland Gillen, Kathrin C. Knirsch, Ievgen Donskyi, Siegfried Eigler, Janina Maultzsch, Andreas Hirsch   +12 more
wiley   +1 more source

A Cluster-Based Channel Model Incorporating Quasi-Stationary Segmentation for Vehicle-to-Vehicle Communications

IEEE Open Journal of Vehicular Technology
Vehicle-to-vehicle (V2V) wireless communication is vital for intelligent transportation systems (ITSs). The high mobility of transceivers, along with the complex 3D propagation caused by low antenna heights and short communication ranges, present ...
Fan Yu, Mingqi Guo, Qi Wang, Pengqi Zhu, Yixiao Tong, Jose Rodriguez-Pineiro, Xuefeng Yin   +6 more
doaj   +1 more source

Phase-Induced Frequency Conversion and Doppler Effect With Time-Modulated Metasurfaces [PDF]

IEEE Transactions on Antennas and Propagation, 2020
Metasurfaces consisting of electrically thin and densely packed planar arrays of subwavelength elements enable an unprecedented control of the impinging electromagnetic fields.
D. Ramaccia, D. Sounas, A. Alú, A. Toscano, F. Bilotti   +4 more
semanticscholar   +1 more source

A Vertically‐Stacked Optoelectronic Sensor for Localized Hemodynamics Monitoring

Advanced Functional Materials, EarlyView.
This work introduces a hemodynamics monitoring sensor that features vertically stacked microLEDs and a heterogeneously integrated photodetector. The vertically stacked microLEDs enable localized measurements, and by designing the interoptode distance according to the depth of the target region, this vertically stacked optoelectronic sensor is ...
Taeyeon Lee, Jieun Jung, Hyeongoh Park, Dongwuk Jung, Doyune Kim, Changeui Hong, Seungbeom Kang, Hyunsoo Kim, Tae Kim, Jongho Lee   +9 more
wiley   +1 more source

Concept for automatic Doppler compensation in two-way communication systems [PDF]

, 1968
Automatic Frequency Control system compensates for Doppler shift in two-way communication systems where one or both stations are moving. This automatic correction can be applied to the reply link to elimate frequency search for the reply or an excessive ...
Muller, R. M.
core   +1 more source