Results 1 to 10 of about 835,120 (286)

Numerical Study on Effects of High-Frequency Arrayed Energy Deposition on Scramjet Combustor Performance [PDF]

Hangkong bingqi, 2023
For the supersonic flows have large momentum, it is difficult to get higher penetration depth because of the influence of transverse jet on incoming flow so as to affect the mixing and combustion efficiency of jet in scramjet combustor.
Cai Zilin, Gao Feng, Wang Hongyu, Ma Cenrui
doaj   +1 more source

Bonuses and pitfalls of a paperless drive-through screening and COVID-19: A field report

Journal of Microbiology, Immunology and Infection, 2021
As the world witnessed the rapid spread of SARS-CoV-2, the World Health Organization has called for governing bodies worldwide to intensify case findings, contact tracing, monitoring, and quarantine or isolation of contacts with COVID-19.
Elly Lee, Nurul Yaqeen Mohd Esa, Tong Ming Wee, Chun Ian Soo   +3 more
doaj   +1 more source

VELOcities of CEpheids (VELOCE) [PDF]

Astronomy & Astrophysics
We present the first data release of VELOcities of CEpheids (VELOCE), dedicated to measuring the high-precision radial velocities (RVs) of Galactic classical Cepheids (henceforth, Cepheids). The first data release (VELOCE DR1) comprises 18 225 RV measurements of 258 bona fide classical Cepheids on both hemispheres collected mainly between 2010 and 2022,
Anderson, Richard I., Viviani, Giordano, Shetye, Shreeya S., Mowlavi, Nami, Eyer, Laurent, Palaversa, Lovro, Holl, Berry, Blanco-Cuaresma, Sergi, Kravchenko, Kateryna, Pawlak, Michal, Reyes, Mauricio Cruz, Khan, Saniya, Netzel, Henryka E., Loebling, Lisa, Papics, Peter I., Postel, Andreas, Roelens, Maroussia, Spetsieri, Zoi T., Thoul, Anne, Zak, Jiri, Bonvin, Vivien, Martin, David V., Millon, Martin, Saesen, Sophie, Wyttenbach, Aurelien, Figueira, Pedro, Marmier, Maxime, Prins, Saskia, Raskin, Gert, van Winckel, Hans   +29 more
openaire   +7 more sources

Assessing the Efficiency of an Active Viscous Damper in Near-Field and Far-Field Earthquakes [PDF]

Journal of Structural and Construction Engineering, 2021
The present article involves evaluating the efficiency of an active viscous damper in controlling vibrations caused by near and far field earthquakes. Being installed on chevron bracing systems, the damper is able to provide necessary controlling forces ...
Ali Jalaeefar, Mahdi Kiani
doaj   +1 more source

Residual strain measurement based on longitudinal to shear wave velocity ratio with a dual-mode EMAT

Frontiers in Materials, 2023
In this paper, a new and noncontact method with measuring longitudinal to shear wave velocity ratio by a dual-mode electromagnetic acoustic transducer is proposed for residual strain measurement in a metal structure without knowing its thickness. Firstly,
Geng Dang, Geng Dang, Cuixiang Pei, Zhanfeng Yang, Haiqiang Zhou   +4 more
doaj   +1 more source

Feasibility of challenging treadmill speed-dependent gait and perturbation-induced balance training in chronic stroke patients with low ambulation ability: a randomized controlled trial

Frontiers in Neurology, 2023
BackgroundTreadmill training shows advantages in the specificity, amount, and intensity of gait and balance practice for the rehabilitation of stroke patients.ObjectiveTo investigate the feasibility and effectiveness of challenging treadmill speed ...
Jia Hu, Lingjing Jin, Yubing Wang, Xia Shen, Xia Shen   +4 more
doaj   +1 more source

Comparative Appraisal of Three Low-Cost GPS Speed Sensors with Different Data Update Frequencies

AgriEngineering, 2021
Low-cost GPS (Global Positioning System) speed sensors have been available to quantify vehicle speed on different platforms including agricultural tractors in precision agriculture applications such as yield monitoring, variable rate fertilizer and ...
Mustafa Akkamis, Muharrem Keskin, Yunus Emre Sekerli   +2 more
doaj   +1 more source

Studying sediment transport dynamics by using the Smart sphere

International Journal of Energetica, 2020
A new method is introduced by using high precision accelerometer and gyroscope micro-electromechanical sensors (MEMS), which can record Lagrangian observations of sediments and shed light into the dynamics of sediment transport processes at above ...
Zaid Alhusban, Manousos Valyrakis
doaj   +1 more source

Velocity and Velocity-Difference Distributions in Burgers Turbulence [PDF]

Physical Review Letters, 2004
We consider the one-dimensional Burgers equation randomly stirred at large scales by a Gaussian short-time correlated force. Using the method of dissipative anomalies, we obtain velocity and velocity-difference probability density functions and confirm the results with high-resolution numerical simulations.
Boldyrev, S., Linde, T., Polyakov, A.
openaire   +3 more sources

Debris Emergence Elevations and Glacier Change

Frontiers in Earth Science, 2021
Debris-covered glaciers represent potentially significant stores of freshwater in river basins throughout High Mountain Asia (HMA). Direct glacier mass balance measurements are extremely difficult to maintain on debris-covered glaciers, and optical ...
Joseph M. Shea, Philip D. A. Kraaijenbrink, Walter W. Immerzeel, Fanny Brun   +3 more
doaj   +1 more source