Results 91 to 100 of about 291,896 (358)

The Dust Trail of Comet 67P/Churyumov-Gerasimenko

, 2007
We report the detection of comet 67P/Churyumov-Gerasimenko's dust trail and nucleus in 24 micron Spitzer Space Telescope images taken February 2004. The dust trail is not found in optical Palomar images taken June 2003.
A'Hearn, A'Hearn, A'Hearn, Agarwal, Agarwal, Brownlee, Burns, Colangeli, David J. Lien, Fernández, Fomenkova, Fukugita, Fulle, Fulle, Fulle, Fulle, Gehrz, Giorgini, Glassmeier, Green, Groussin, Groussin, Hanner, Harker, Harker, Harris, Hörz, Ishiguro, Ishiguro, Ishiguro, Jenniskens, Jenniskens, Keller, Kidger, Kimura, Kolokolova, Lamy, Lamy, Lamy, Lasue, Lebofsky, Levasseur-Regourd, Lisse, Lisse, Lisse, Lisse, Mathis, McDonnell, McDonnell, Meech, Michael S. Kelley, Neckel, Osip, Reach, Reach, Rieke, Schleicher, Smith, Spencer, Spitzer Science Center, Sykes, Sykes, Vaubaillon, Werner, William T. Reach   +64 more
core   +1 more source

Strain Partitioning in the Southeastern Tibetan Plateau From Kinematic Modeling of High‐Resolution Sentinel‐1 InSAR and GNSS

Geophysical Research Letters
Fault slip rates estimated from geodetic data are being integrated into seismic hazard models. The standard approach requires modeling velocities and relative (micro‐)plate motions, which is challenging for fault‐based models.
Jin Fang, Tim J. Wright, Kaj M. Johnson, Qi Ou, Richard Styron, Tim J. Craig, John R. Elliott, Andy Hooper, Gang Zheng   +8 more
doaj   +1 more source

Calibration of SAR Polarimetric Images by Covariance Matching Estimation Technique with Initial Search

Remote Sensing
To date, various methods have been proposed for calibrating polarimetric synthetic aperture radar (SAR) using distributed targets. Some studies have utilized the covariance matching estimation technique (Comet) for SAR data calibration.
Jingke Liu, Lin Liu, Xiaojie Zhou
doaj   +1 more source

Spiro‐Phenothiazine Hole‐Transporting Materials: Unlocking Stability and Scalability in Perovskite Solar Cells

Advanced Materials, EarlyView.
Fluorene‐functionalized spiro‐phenothiazine (PTZ‐Fl) exhibits strong Li+ affinity and thermal stability, enabling a PCE of 25.75% in small‐area cells and 22.07% in 25 cm2 modules. Under ISOS‐L3 conditions, PTZ‐Flbased devices retain over 80% efficiency after 1000 hours, demonstrating superior stability and scalability compared to spiro‐OMeTAD for next ...
Javier Urieta‐Mora, Seung Ju Choi, Jaeki Jeong, Silvia Orecchio, Inés García‐Benito, Manuel Pérez‐Escribano, Joaquín Calbo, Likai Zheng, Minseop Byun, Seyeong Song, Gi‐Hwan Kim, Shaik M. Zakeeruddin, Seog‐Young Yoon, Yimhyun Jo, Agustín Molina‐Ontoria, Enrique Ortí, Nazario Martín, Michael Grätzel   +17 more
wiley   +1 more source

Follow-up observations of Comet 17P/Holmes after its extreme outburst in brightness end of October 2007

, 2009
We present follow-up observations of comet 17/P Holmes after its extreme outburst in brightness, which occurred end of October 2007. We obtained 58 V-band images of the comet between October 2007 and February 2008, using the Cassegrain-Teleskop-Kamera ...
Barnard, Boss, Buzzi, Campbell, Fernández, Holmes, Krueger, Mugrauer, Skrutskie, Whipple   +9 more
core   +1 more source

An investigation of changes to commercial aircraft flight paths during volcanic eruptions

Journal of Applied Volcanology
Volcanic eruptions can inject ash into the atmosphere, which is then advected by meteorological winds, potentially affecting large volumes of airspace. Volcanic Ash Advisory Centres (VAACs) issue volcanic ash advisories (VAAs) when airspace is likely to ...
Juliette Delbrel, Mike Burton, Samantha Engwell, Benjamin Esse, Catherine Hayer   +4 more
doaj   +1 more source

Nearly Three Centuries of Lava Flow Subsidence at Timanfaya, Lanzarote

Geochemistry, Geophysics, Geosystems, 2022
The 1730–1736 eruption on Lanzarote was one of the most significant volcanic eruptions to occur on the Canary Islands, with lavas covering over 200 km2.
Victoria Purcell, Eoin Reddin, Susanna Ebmeier, Pablo J. González, Andrew Watson, Yu Morishita, John Elliott   +6 more
doaj   +1 more source

Role of the Setae in an Ectoparasitic Seal Louse in Reducing Surface Drag: Numerical Modeling Approach

Advanced Theory and Simulations, EarlyView.
The seal louse Echinophthirius horridus has uniquely shaped setae that may reduce drag during its host's dives. Using numerical simulations, this study demonstrates that their natural inclination promotes vortex formation, minimizing friction and energy loss. These findings provide insights into biological surface adaptations and may inspire the design
Anika Preuss, Stanislav N. Gorb, Alexander Kovalev, Alexander E. Filippov   +3 more
wiley   +1 more source

EPOXI Mission: Comet on a Stick [PDF]

, 2009
In this activity, students examine their concepts of a comet by designing and building a model. The goal is to have students replicate the scientific processes of observing, modeling, forming an explanation, making new observations, and revising. In this
John Risvey
core  

Systematic satellite observations of the impact of aerosols from passive volcanic degassing on local cloud properties [PDF]

Atmospheric Chemistry and Physics, 2014
The impact of volcanic emissions, especially from passive degassing and minor explosions, is a source of uncertainty in estimations of aerosol indirect effects.
S. K. Ebmeier, A. M. Sayer, R. G. Grainger, T. A. Mather, E. Carboni   +4 more
doaj   +1 more source