Results 51 to 60 of about 305,280 (307)

Rotation-Activity-Age Relations for Solar-Type and Cooler Stars [PDF]

, 2016
The fact that stellar rotation and chromospheric emission are correlated with age was explicitly noted by Wilson (1963) and reinforced by Kraft (1967). Wilson knew that Ca II emission was correlated with surface magnetic field in the Sun. Skumanich (1972)
Basri, Gibor, Basri, Gibor (5201506)
core   +1 more source

Evaluating the JULES land surface model energy fluxes using FLUXNET data [PDF]

, 2010
Surface energy flux measurements from a sample of ten FLUXNET sites selected to represent a range of climate conditions and biome types were used to assess the performance of the Hadley Centre land surface model (JULES).
Lloyd, Amanda, Shuttleworth, Jim, Lloyd, A., Pryor, M., Weedon, G.P., Blyth, E., Blyth, Eleanor, Gash, John, Weedon, Graham P., Gash, J.H.C., Shuttleworth, J., Pryor, Matthew, Lloyd, A.J.   +12 more
core   +1 more source

On the duality between rotational minimal surfaces and maximal surfaces

Journal of Mathematical Analysis and Applications, 2018
We investigate the duality between minimal surfaces in Euclidean space and maximal surfaces in Lorentz-Minkowski space in the family of rotational surfaces. We study if the dual surfaces of two congruent rotational minimal (or maximal) surfaces are congruent. We show that in the duality process by means of a one-parameter group of rotations, it appears
Rafael López, Seher Kaya
openaire   +3 more sources

Structural insights into an engineered feruloyl esterase with improved MHET degrading properties

FEBS Letters, EarlyView.
A feruloyl esterase was engineered to mimic key features of MHETase, enhancing the degradation of PET oligomers. Structural and computational analysis reveal how a point mutation stabilizes the active site and reshapes the binding cleft, expading substrate scope.
Panagiota Karampa, Konstantinos Makryniotis, Theofani‐Iosifina Sousani, Evangelos Topakas, Vangelis Daskalakis, Maria Dimarogona   +5 more
wiley   +1 more source

Residual tail twisting in ascidian larvae is stabilized by asymmetric myofibrils that resist bilateral symmetry restoration

FEBS Letters, EarlyView.
Ascidian Ciona larvae initially show strong clockwise tail twisting, which is largely corrected during development. However, a small residual twist remains. This study shows that organized helical myofibrils in tail muscles mechanically stabilize this residual asymmetry, preventing complete restoration of bilateral symmetry and revealing how embryos ...
Yuki S. Kogure, Misaki K. Nishio, Satoru Okuda, Kohji Hotta   +3 more
wiley   +1 more source

MRI-based skeletal hand movement model [PDF]

, 2012
The kinematics of the human hand is optimal with respect to force distribution during pinch as well as power grasp, reducing the tissue strain when exerting forces through opposing fingers and optimising contact faces.
Hillenbrand, Ulrich, Stillfried, Georg, Ulrich Hillenbrand, Patrick van der Smagt, Marcus Settles, Georg Stillfried, Settles, Marcus, van der Smagt, Patrick   +7 more
core   +1 more source

Projection Friction Stir Spot Welding: A New Welding Technique for Creating Safe and Reliable Aluminum Welds [PDF]

Iranian Journal of Oil & Gas Science and Technology, 2020
A novel friction stir welding method called projection friction stir spot welding (PFSSW) was introduced to produce safe and reliable welds by using a pinless tool and a specially-designed projection on the surface of a backing anvil.
Ali Arabzadeh, Seyed Mostafa Mousavizade, Bahman Korojy, Seyed Alireza Hosseini   +3 more
doaj   +1 more source

Flare differentially rotates sunspot on Sun’s surface [PDF]

Nature Communications, 2016
AbstractSunspots are concentrations of magnetic field visible on the solar surface (photosphere). It was considered implausible that solar flares, as resulted from magnetic reconnection in the tenuous corona, would cause a direct perturbation of the dense photosphere involving bulk motion.
Gary, Dale, Wang, Haimin, Jing, Ju, Wang, Jiasheng, Hudson, Hugh, Lee, Jeongwoo, Deng, Na, Cao, Wenda, Xu, Yan, Liu, Chang, Wang, Haimin, Jing, Ju, Wang, Jiasheng, Gary, Dale, Hudson, Hugh, Lee, Jeongwoo, Deng, Na, Cao, Wenda, Xu, Yan, Liu, Chang   +19 more
openaire   +5 more sources

Biophysical approaches for studying viral entry

FEBS Letters, EarlyView.
Viruses infect all living organisms and have been responsible for major epidemics and pandemics. Their ongoing evolutionary battle with host defenses creates a constant need for improved tools to study viral behavior. Advancing methods to probe viral attachment, fusion, and genome release deepen our understanding of how infections begin and support the
Inbar Yosibash, Raya Sorkin
wiley   +1 more source

Near-uniform internal rotation of the main-sequence γ Doradus pulsator KIC 7661054 [PDF]

, 2016
We used Kepler photometry to determine the internal rotation rate of KIC 7661054, a chemically normal γ Dor star on the main sequence at spectral type F2.5 V.
Kurtz, Donald W., Grassitelli, Luca, Murphy, Simon J., Bedding, Timothy R., Saio, Hideyuki, Wang, Edric S., Fossati, Luca   +6 more
core   +1 more source