Results 51 to 60 of about 270,103 (305)

Radio techniques for the measurement of ice thickness [PDF]

Polar Record, 1963
In recent years, phenomena observed in two quite separate fields of study have led to the suggestion that radio waves may propagate through cold ice masses with sufficiently small loss by absorption to permit the thickness to be measured, and some information about the nature of the bottom surface to be derived by radar.
openaire   +1 more source

Coherent radar ice thickness measurements over the Greenland ice sheet [PDF]

Journal of Geophysical Research: Atmospheres, 2001
We developed two 150‐MHz coherent radar depth sounders for ice thickness measurements over the Greenland ice sheet. We developed one of these using connectorized components and the other using radio frequency integrated circuits (RFICs). Both systems are designed to use pulse compression techniques and coherent integration to obtain the high ...
Gogineni, Sivaprasad, Tammana, Dilip, Braaten, David A., Leuschen, Carl J., Legarsky, Justin, Kanagaratnam, Pannirselvam, Stiles, James Marion, Allen, Christopher Thomas, Jezek, Kenneth C., Akins, Torry L.   +9 more
openaire   +2 more sources

Baltic sea ice thickness estimation based on X-band SAR data and background information

Annals of Glaciology
In this study an operational sea ice thickness (SIT) estimation algorithm, based on HH-polarized X-band synthetic aperture radar (SAR) data, background information from the most recent, typically from the previous day, available daily Baltic Sea ice ...
Juha Antero Karvonen, Bin Cheng
doaj   +1 more source

Including debris cover effects in a distributed model of glacier ablation [PDF]

, 2012
Distributed glacier melt models generally assume that the glacier surface consists of bare exposed ice and snow. In reality, many glaciers are wholly or partially covered in layers of debris that tend to suppress ablation rates.
Andersen, Anderson, Anderson, Anslow, Arnold, Arnold, B. W. Brock, Bolch, Braithwaite, Brock, Brock, Brock, Dadic, F. Pellicciotti, Foster, Fountain, Hubbard, Intergovernmental Panel on Climate Change, Kellerer-Pirklbauer, Kirkbride, Klok, Kossmann, Lhomme, M. Carenzo, MacDougall, Michlmayr, Mihalcea, Nakawo, Nicholson, Oerlemans, Pellicciotti, Pellicciotti, Pellicciotti, Petersen, Popovnin, Reid, Reijmer, Rye, Scherler, Shea, Shukla, Stokes, Strasser, Swinbank, T. D. Reid, Tenchov, Turnipseed, Zemp, Østrem   +48 more
core   +1 more source

Radar measurements of ice sheet thickness of outlet glaciers in Greenland [PDF]

IEEE International Geoscience and Remote Sensing Symposium, 2003
We have conducted airborne measurements over the Greenland ice sheet from the NASA P-3B aircraft using a 150-MHz coherent radar depth sounder to obtain extensive ice sheet thickness measurements. Simultaneous measurements of ice sheet elevation were also made using a laser altimeter.
David Braaten, Sivaprasad Gogineni
openaire   +1 more source

Engineered extracellular vesicles enriched with the miR‐214/199a cluster enhance the efficacy of chemotherapy in ovarian cancer

Molecular Oncology, EarlyView.
Loss of the miR‐214/199a cluster is associated with recurrence in ovarian cancer. Engineered small extracellular vesicles (m214‐sEVs) elevate miR‐214‐3p/miR‐199a‐5p in tumor cells, suppress β‐catenin, TLR4, and YKT6 signaling, reprogram tumor‐derived sEV cargo, reduce chemoresistance and migration, and enhance carboplatin efficacy and survival in ...
Weida Wang, Ayesha Alvero, Yi Qin, Mingjin Wang, Alexandra Fox, Yanfeng Li, Michael Millman, Amy Kemper, Gil Mor, Xian Shuang Liu, Michael Chopp, Zheng Gang Zhang, Yi Zhang   +12 more
wiley   +1 more source

The bedrock topography of Gries- and Findelengletscher [PDF]

, 2018
Knowledge of the ice thickness distribution of glaciers is important for glaciological and hydrological applications. In this contribution, we present two updated bedrock topographies and ice thickness distributions for Gries- and Findelengletscher ...
Farinotti, Daniel, Feiger, Nadine, Huss, Matthias, Leinss, Silvan, Sold, Leo   +4 more
core   +2 more sources

Proteasome inhibitor, ixazomib prevents topoisomerase‐I degradation and reverses irinotecan resistance in colorectal cancer

Molecular Oncology, EarlyView.
Ixazomib inhibits proteasome‐mediated degradation of topoisomerase I induced by irinotecan, thereby restoring drug sensitivity and promoting tumor cell death in colorectal cancer. Irinotecan, a topoisomerase I (topoI) inhibitor, is widely used for colorectal cancer, but resistance remains a major clinical challenge.
Yuho Ebata, Koji Ando, Hirofumi Hasuda, Koshi Mimori, Elizabeth C. Unan, Siddhartha Pulukuri, Aahana Tiku, Allison Berger, Eiji Oki, Ajit Bharti, Tomoharu Yoshizumi   +10 more
wiley   +1 more source

Kennicott Glacier, Alaska: Ice Thickness Measurements using Ground Penetrating Radar (and Inexperienced Skiiers) [PDF]

, 2013
What happens when you send a professor, a mentor, and seven inexperienced undergraduates into the field? Dr. Erin Pettit and UAF graduate student Christina Carr led myself and six other undergraduates onto Kennicott Glacier in hopes of teaching us about
Albert, Sarah
core  

A Passive Probe for Subsurface Oceans and Liquid Water in Jupiter's Icy Moons

, 2014
We describe an interferometric reflectometer method for passive detection of subsurface oceans and liquid water in Jovian icy moons using Jupiter's decametric radio emission (DAM).
Heggy, Essam, Liewer, Kurt, Maiwald, Frank, Ries, Paul, Romero-Wolf, Andrew, Vance, Steve   +5 more
core   +1 more source