Results 21 to 30 of about 1,981,461 (291)

Survey on Intentional Interference Techniques of GNSS Signals and Radio Links between Unmanned Aerial Vehicle and Ground Control Station [PDF]

TransNav
With the rapid development of unmanned aerial vehicle (UAV) technology, UAVs are gaining increasing importance in civilian, industrial, and military applications.
Jan Dulowicz, Pawel Skokowski, Jan Kelner   +2 more
doaj   +1 more source

Frequency Spectrum Analysis of Signals Used in Transcorneal Electrical Stimulation

Nova Scientia, 2022
The contribution of this research work focuses on understanding the biological behavior of time-varying electric fields, specifically in the eyeball, by proposing sensitive frequency ranges, specifically for primary open-angle glaucoma POAG and RP ...
Jorge Santiago Amaya , José Antonio Mendoza Hernández, Félix Gil Carrasco , Jarumi Aguilar Guggembuhl, Claudio López García   +4 more
doaj   +1 more source

Experimental study on the lubrication characteristics of porous journal bearings with hydrodynamic shape forming at annular surface under sine-wave vibrated conditions (Examination into the shaft rotating behavior at the starting state by identifying the rotational modes with Frequency Spectrum Analysis of the time history waveform on shaft)

Nihon Kikai Gakkai ronbunshu, 2019
This report describes the study on the lubrication characteristics of porous journal bearings, which were made with oil impregnated sintered materials having some hydrodynamic shapes, to apply them for a DC Spindle Motor’s bearing system. Herring Bone (I
Shigeru OHTSUKA, Masaki YAKABE, Yasutaka HAYAMIZU, Koichi OTSUKA   +3 more
doaj   +1 more source

The NuSTAR View of a QPO Evolution of GRS 1915+105 [PDF]

, 2015
We report a timing analysis of the black hole binary GRS 1915+105 with the NuSTAR observatory. A strong type-C QPO below 2 Hz appears in the power density spectrum during the whole observation, whose frequency is correlated with the 3-25 keV count rate ...
Bu, Qingcui, Chen, Li, Qu, Jinlu, Zhang, Liang   +3 more
core   +2 more sources

Possible Signatures Of Dissipation From Time-Series Analysis Techniques Using A Turbulent Laboratory Magnetohydrodynamic Plasma [PDF]

, 2016
The frequency spectrum of magnetic fluctuations as measured on the Swarthmore Spheromak Experiment is broadband and exhibits a nearly Kolmogorov 5/3 scaling.
Brown, Michael R., Rock, Ariel B., , \u2716, Schaffner, D. A.   +2 more
core   +2 more sources

Frequency spectrum characteristic of quartz sandstone rock mass with GPR

工程科学学报, 2015
Ground penetrating radar(GPR) electromagnetic waves which penetrate through rock and soil mediums and are reflected back carry internal information about the target objects.
YANG Guang, LIU Dun-wen
doaj   +1 more source

Analysis and optimization of rubidium spectrum lamp to eliminate frequency fluctuations of rubidium atomic frequency standard [PDF]

MATEC Web of Conferences, 2020
Rubidium atomic frequency standard (RAFS) is the most widely used frequency standard in space. The light used to pump the atoms and detect the resonance signal is emitted by rubidium spectrum lamp, so the light intensity of rubidium spectrum lamp ...
Lian Jiqing, Zhang Jinhai, Shi Fucheng, Zhang Jun, Wei Lixun, Wang Kuan   +5 more
doaj   +1 more source

Photoacoustic spectrum analysis for spherical target size and optical property determination: A feasibility study

Photoacoustics, 2023
The photoacoustic signal generated by an optically absorbing target is determined by the spatial profile of absorbed optical energy within the target.
M. Dantuma, D.B. Gasteau, S. Manohar
doaj   +1 more source

The very steep spectrum radio halo in Abell 697 [PDF]

, 2010
In this paper we present a detailed study of the giant radio halo in the galaxy cluster Abell 697, with the aim to constrain its origin and connection with the cluster dynamics.
Abell, Aharonian, Aharonian, Bacchi, Bauer, Blasi, Blasi, Bonafede, Bonamente, Brunetti, Brunetti, Brunetti, Brunetti, Brunetti, Brunetti, Brunetti, Brunetti, Buote, Cassano, Cassano, Churazov, Condon, D. Dallacasa, Dahle, Dallacasa, De Filippis, Dennison, Dermer, Dolag, Ebeling, Feretti, Ferrari, Fujita, G. Brunetti, G. Macario, Giacintucci, Giacintucci, Giovannini, Giovannini, Girardi, Govoni, Govoni, Jaffe, Kempner, Laganá, Metzger, Moskalenko, Orrú, Ota, Petrosian, Pfrommer, R. Athreya, R. Cassano, Rengelink, Rybichi, S. Bardelli, S. Giacintucci, Sarazin, T. Venturi, van Weeren, Venturi, Venturi, Vikhlinin   +62 more
core   +1 more source

Experimental study on the lubrication characteristics of porous circular journal bearing under shaft unsteady condition (Examination into the whirling behavior of shaft at pivot supported condition by measuring the time history waveform of shaft with parameter of diametral clearance changes)

Nihon Kikai Gakkai ronbunshu, 2015
This report is described the study on the lubrication characteristics of porous circular journal bearing made with oil impregnate sintered materials as a DC spindle motor's bearing system.
Shigeru OHTSUKA, Masaki YAKABE, Takeshi GONDA, Hiroyuki YAMADA   +3 more
doaj   +1 more source