Results 261 to 270 of about 31,376 (304)

A Superlubricated Magnetically Steerable Microcatheter with Integrated Optical and Fluidic Channels

Advanced Robotics Research, EarlyView.
A magnetically steerable microcatheter with integrated optical and fluidic channels is developed for multifunctional navigation in tortuous anatomical environments. A surface‐grafted hydrogel coating enables low‐friction actuation. The device demonstrates stable light and fluid delivery during magnetic manipulation, offering a compact platform for ...
Yuntian Du, Ruokun He, Luqi Li, Hesheng Wang, Zhuo‐Chen Ma, Bing Han   +5 more
wiley   +1 more source

Radio Echo Sounding of Antarctic Ice by JARE-10

Annals of The Tohoku Geographycal Asocciation, 1970
openaire   +2 more sources

Observed positive feedback between surface ablation and crevasse formation drives glacier acceleration and potential surge. [PDF]

Nat Commun
Nanni U, Bouchayer C, Åkesson H, Lefeuvre PM, Mannerfelt ES, Köhler A, Gagliardini O, Kohler J, Schmidt LS, Hult J, Renard F, Schuler TV.   +11 more
europepmc   +1 more source

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Progress report on radio echo sounding

Polar Record, 1967
This report is intended to summarize activities in radio echo sounding since the introductory paper which appeared in the Polar Record four years ago (Evans, 1963 a). The field work since that time is discussed in rough chronological order, with references to the sources of more detailed information and an assessment of the principal results.
S. Evans, D. J. Drewry, G. de Q. Robin
openaire   +2 more sources

Antarctic airborne radio echo sounding, 1977–78

Polar Record, 1978
During the austral summer 1977–78 the Scott Polar Research Institute (SPRI) conducted a fifth season of airborne radio echo sounding in Antarctica as part of a joint project with the US National Science Foundation Division of Polar Programs (NSF-DPP) and the Technical University of Denmark (TUD).
D. J. Drewry, D. T. Meldrum
openaire   +1 more source

Radio echo sounding of sea ice

Ocean '74 - IEEE International Conference on Engineering in the Ocean Environment, 1974
1. Morphological structure and state (i.e. temperature, salinity) of drifting sea ice are discussed. 2. The results of laboratory and natural investigations of UHF electromagnetic characteristics ( and tg ) of drifting sea ice are given. The estimate of electromagnetic contrast on ice-sea water boundary is given. 3.
openaire   +1 more source

Airborne radio echo sounding of glaciers in Svalbard

Polar Record, 1980
During April–May 1980 the Scott Polar Research Institute (SPRI) and Norsk Polarinstitutt (NPI) conducted a joint programme of radio echo sounding (RES) in Svalbard. The principal aims were to evaluate the performance of SPRI 60 MHz echo sounding equipment of Svalbard glaciers, to measure ice thickness over a wide range of conditions, and to investigate
D. J. Drewry, O. Liestøl, C. S. Neal, O. Orheim, B. Wold   +4 more
openaire   +1 more source

Airborne radio echo sounding of outlet glaciers in Greenland

International Journal of Remote Sensing, 1997
Abstract We used a coherent radar depth sounder operating at 150MHz to collect ice thickness data on outlet glaciers in northwestern Greenland. The radar data were collected in conjunction with laser surface elevation measurements and were tagged with GPS information for accurate geolocation.
C. Allen, S. Gogineni, B. Wohletz, K. Jezek, T. Chuah   +4 more
openaire   +1 more source

Compartmental low-rank filtering of radio-echo sounding data

2016 16th International Conference on Ground Penetrating Radar (GPR), 2016
This paper presents a compartmental filtering method to improve signal-to-noise ratio (SNR) of the radio-echo sounding (RES) data of ice sheets while preserve weak signals in the deep layers. The proposed method performs local low-rank filtering on different internal layers of ice sheet to avoid weak signals from being filtered by global denoising ...
Y. Liu, Q. Wang, B. Zhao, X. J. Liu
openaire   +1 more source

Ultra high frequency radio echo sounding of glaciers

2010
For determining the thickness of ice, radio echo sounding of glaciers is well established as a technique for rapid gathering of data. However it has become evident that radio echo sounder parameters must be tailored to meet specific requirements in order to achieve best results.
openaire   +1 more source