Results 71 to 80 of about 203,115 (295)

Polar-cap accelerator and radio emission from pulsars

, 2008
Electric currents j flow along the open magnetic field lines from the polar caps of neutron stars. Activity of a polar cap depends on the ratio \alpha=j/c\rho_GJ, where \rho_GJ is the corotation charge density. The customary assumption \alpha\approx 1 is
Andrei M. Beloborodov, Arons, Beloborodov, Contopoulos, Fawley, Gil, Kennel, Levinson, Lyubarsky, Mestel, Muslimov, Spitkovsky   +11 more
core   +1 more source

INFLUENCE OF THE POLAR CAP CURRENT ON PULSAR POLARIZATION [PDF]

The Astrophysical Journal, 2012
20 pages of text, 11 figures, Revised version with the correction to abscissa of the left column panels in Figure 3, and inclusions of Figure 11 and discussions on the effect of ExB drift.
Kumar, D., Gangadhara, R. T.
openaire   +2 more sources

Characterization of Macro/Microstructure and Corrosion Resistance of Austenitic Gas Tungsten Arc Welding Cladding

Advanced Engineering Materials, EarlyView.
Cladding is a proven method that boosts the surface qualities of mechanical parts by applying a layer of more durable material over a base substrate. This work responds to the needs of offshore and pressure vessels sectors by focusing on cladding a super austenitic steel onto low‐carbon steel through gas tungsten arc welding.
E. J. da Cruz Junior, F. M. F. A. Varasquim, F. O. Carvalho, L. F. F. Santiago, V. A. Ventrella, I. Calliari, M. Pigato   +6 more
wiley   +1 more source

The spark-associated soliton model for pulsar radio emission [PDF]

, 2000
We propose a new, self-consistent theory of coherent pulsar radio emission based on the non-stationary sparking model of Ruderman & Sutherland (1975), modified by Gil & Sendyk (2000) in the accompanying Paper I.
Asseo E., Avtandil D. Pataraya, Gangadhara R. T., Gaponov A. V., George I. Melikidze, Gil J., Gil J., Gil J., Gil J., Gil J., Ichikawa Y. H., Ichikawa Y. H., Janusz A. Gil, Karpman V. I., Kazbegi A. Z., Kijak J., Lighthill M. J., Lominadze J. G., Lyne A. G., Malofeev V. M., Melikidze G. I., Melikidze G. I., Pataraya A. D., Petviashvili V. I., Radhakrishnan V., Zakharov V. A.   +25 more
core   +2 more sources

Incorporation of Selenium into Sol–Gel‐Derived Bioactive Glass: Influence on Glass Structure, Bioactivity, and its Selective Cytotoxicity

Advanced Engineering Materials, EarlyView.
Selenium was incorporated into a sol–gel‐derived bioactive glass to enable sustained therapeutic ion release. The selenium‐containing glass preserved bioactivity while selectively inducing cytotoxicity in osteosarcoma cells and maintaining osteoblastic viability.
Breno Rocha Barrioni, Thalita Marcolan Valverde, Talita Martins, Guilherme Mattos Jardim Costa, Alfredo Miranda de Goes, Marcello Rosa Dumont, Eduardo Henrique Martins Nunes, Marivalda de Magalhães Pereira   +7 more
wiley   +1 more source

Storm-time related mass density anomalies in the polar cap as observed by CHAMP [PDF]

Annales Geophysicae, 2010
Strong and localized thermospheric mass density events are observed in the polar cap region by the CHAMP satellites at about 400 km altitude during geomagnetic storms.
R. Liu, R. Liu, H. Lühr, S.-Y. Ma
doaj   +1 more source

Utilizing the polar cap index to explore strong driving of polar cap dynamics [PDF]

Journal of Geophysical Research: Space Physics, 2012
The polar cap, defined as a region of open magnetic flux, is an ideal region in which to investigate how properties of the solar wind directly affect the magnetosphere. For such studies, the polar cap (PC) index provides a useful characterization of the state of the polar ionosphere.
Gao, Ye, Kivelson, Margaret G., Ridley, Aaron J., Weygand, James M., Walker, Raymond J.   +4 more
openaire   +2 more sources

NanoMOF‐Based Multilevel Anti‐Counterfeiting by a Combination of Visible and Invisible Photoluminescence and Conductivity

Advanced Functional Materials, EarlyView.
This study presents novel anti‐counterfeiting tags with multilevel security features that utilize additional disguise features. They combine luminescent nanosized Ln‐MOFs with conductive polymers to multifunctional mixed‐matrix membranes and powder composites. The materials exhibit visible/NIR emission and matrix‐based conductivity even as black bodies.
Moritz Maxeiner, Ruben Maile, Murat Cuvalli, Andreas Wolf, Ayisha Komal, Robert Oestreich, Christoph Janiak, Karl Mandel, Alexander Knebel, Klaus Müller‐Buschbaum   +9 more
wiley   +1 more source

Plasma flow channels at the dawn/dusk polar cap boundaries: momentum transfer on old open field lines and the roles of IMF B_y and conductivity gradients [PDF]

Annales Geophysicae, 2009
Using DMSP F13 data in conjunction with IMF data we investigate the newly discovered channels of enhanced (1.5–3 km/s) antisunward convection occurring at the dawn (06:00–09:00 MLT) or dusk (15:00–18:00 MLT) flanks of the polar cap for different ...
P. E. Sandholt, C. J. Farrugia
doaj   +1 more source

Stretching the Printability Metric in Direct‐Ink Writing with Highly Extensible Yield‐Stress Fluids

Advanced Functional Materials, EarlyView.
This study introduces “drawability” as a new metric for assessing printability in direct‐ink writing, focusing on gap‐spanning performance and speed robustness. By designing yield‐stress fluids with high extensibility, we demonstrate that extensional strain‐to‐break significantly enhances printability.
Chaimongkol Saengow, Samya Sen, Joaquin Yus, Eliza E. Lovrich, Amanda G. Hoika, Kelly M. Chang, Arielle A. Pfeil, Nellie Haug, Amy J. Wagoner Johnson, Randy H. Ewoldt   +9 more
wiley   +1 more source