Results 21 to 30 of about 254,167 (296)

EFFECT OF HEIGHT, TILT AND TWIST ANGLES OF AN ACTIVE REFLECTANCE SENSOR ON NDVI MEASUREMENTS [PDF]

Engenharia Agrícola, 2019
The application of nitrogen (N) fertilizer is complex and expensive, so its correct management has financial and environmental benefits. The use of optical proximity sensors is a promising technique. However, the movement of the agricultural machinery or
Vinícius Stocker, Eduardo G. de Souza, Jerry A. Johann, Humberto M. Beneduzzi, Franciléia de O. e Silva   +4 more
doaj   +1 more source

UNWINDING MOTION OF A TWISTED ACTIVE REGION FILAMENT [PDF]

The Astrophysical Journal, 2014
To better understand the structures of active-region filaments and the eruption process, we study an active-region filament eruption in active region NOAA 11082 in detail on June 22, 2010. Before the filament eruption, the opposite unidirectional material flows appeared in succession along the spine of the filament. The rising of the filament triggered
Yan, X. L., Xue, Z. K., Liu, J. H., Kong, D. F., Xu, C. L.   +4 more
openaire   +2 more sources

Experimental Validation and Evaluation of a Coupled Twist-Camber Morphing Wing Concept

Applied Sciences, 2021
A morphing wing concept allowing for coupled twist-camber shape adaptation is proposed. The design is based on an optimized thickness distribution both spanwise and chordwise to be able to morph the wing sections into targeted airfoil shapes ...
José Lobo do Vale, John Raffaelli, Afzal Suleman   +2 more
doaj   +1 more source

Nonlinear force-free models for the solar corona I. Two active regions with very different structure [PDF]

, 2007
With the development of new instrumentation providing measurements of solar photospheric vector magnetic fields, we need to develop our understanding of the effects of current density on coronal magnetic field configurations.
Alissandrakis, Altschuler, Aly, Amari, Amari, Amari, Berger, Bleybel, Canfield, Chiu, Close, Démoulin, E. R. Priest, Finn, Gary, Grad, Jiao, Kusano, Leka, Leka, Longcope, Mackay, Maclean, Maclean, Martin, Masuda, Metcalf, Mickey, Moon, Nakagawa, Nindos, Pevtsov, Priest, Priest, Rayrole, Riley, Rust, Régnier, Régnier, Régnier, Régnier, Régnier, S. Régnier, Sakurai, Schrijver, Seehafer, Semel, Smith, Wiegelmann, Wiegelmann, Wiegelmann, Wiegelmann   +51 more
core   +2 more sources

The active site structure and catalytic mechanism of arsenite oxidase

Scientific Reports, 2017
Arsenite oxidase is thought to be an ancient enzyme, originating before the divergence of the Archaea and the Bacteria. We have investigated the nature of the molybdenum active site of the arsenite oxidase from the Alphaproteobacterium Rhizobium sp. str.
Thomas P. Warelow, M. Jake Pushie, Julien J. H. Cotelesage, Joanne M. Santini, Graham N. George   +4 more
doaj   +1 more source

Tensile deformation behavior of twist grain boundaries in CoCrFeMnNi high entropy alloy bicrystals

Scientific Reports, 2021
High entropy alloys (HEA) are a class of materials that consist of multiple elemental species in similar concentrations. The use of elements in far from dilute concentrations introduces a multi-dimensional composition design space by which the properties
Hyunsoo Lee, Mitra Shabani, Garrett J. Pataky, Fadi Abdeljawad   +3 more
doaj   +1 more source

The Warped Nuclear Disk of Radio Galaxy 3C 449 [PDF]

, 2005
Among radio galaxies containing nuclear dust disks, the bipolar jet axis is generally observed to be perpendicular to the disk major axis. The FR I radio source 3C 449 is an outlier to this statistical majority, as it possesses a nearly parallel jet/disk
Axon, David, Baum, Stefi A., Capetti, Alessandro, Chiaberge, Marco, Floyd, David J. E., Macchetto, F. Duccio, Madrid, Juan P., Miley, George K., Noel-Storr, Jacob, O'Dea, Christopher P., Perlman, Eric, Quillen, Alice C., Sparks, William B., Tremblay, Grant R.   +13 more
core   +1 more source

The Influence of Age and Exercise Training Status on Left Ventricular Systolic Twist Mechanics in Healthy Males—An Exploratory Study

Journal of Cardiovascular Development and Disease
Age-related differences in twist may be mitigated with exercise training, although this remains inconclusive. Moreover, temporal left ventricular (LV) systolic twist mechanics, including early-systolic (twistearly), and beyond peak twist (twistpeak ...
Alexander J. Beaumont, Amy K. Campbell, Viswanath B. Unnithan, David Oxborough, Fergal Grace, Allan Knox, Nicholas F. Sculthorpe   +6 more
doaj   +1 more source

Novel Design of Variable Stiffness Pneumatic Flexible Shaft Coupling: Determining the Mathematical-Physical Model and Potential Benefits

Machines, 2023
Presently, mechanical system vibroisolation is becoming increasingly important. One of the new approaches is semi-active vibroisolation using elements capable of changing a selected mechanical property.
Peter Kaššay, Robert Grega, Matej Urbanský, Jozef Krajňák, Matúš Kačír, Lucia Žuľová   +5 more
doaj   +1 more source

Current Helicity and Twist as Two Indicators of The Mirror Asymmetry of solar Magnetic Fields

, 2008
A comparison between the two tracers of magnetic field mirror asymmetry in solar active regions, twist and current helicity, is presented. It is shown that for individual active regions these tracers do not possess visible similarity while averaging by ...
A.A. Pevtsov, A.R. Choudhuri, D. N. Tomin, D. Sokoloff, D. Sokoloff, D.M. Rust, E.N. Parker, E.N. Parker, E.N. Parker, H. Xu, H. Zhang, H. Zhang, H. Zhang, H. Zhang, J. Zhao, K. M. Kuzanyan, K.M. Kuzanyan, L. Gizon, L. Woltjer, M. Hagino, N. Kleeorin, N. Kleeorin, N. Seehafer, S.D. Bao, S.D. Bao, T.J. Wang, V. N. Obridko, V. N. Tutubalin, V.I. Abramenko, V.I. Abramenko, Yu.B. Ponomarenko, Yu.B. Ponomarenko   +31 more
core   +1 more source