Results 91 to 100 of about 38,554 (275)

Topographic and geologic controls on the Northeast Greenland Ice Stream

Annals of Glaciology
The Northeast Greenland Ice Stream (NEGIS) is an elongated feature extending ∼600 km into the interior of the Greenland Ice Sheet. Here, we investigate detailed subglacial topography along the length of the NEGIS to ascertain the characteristics of the ...
Charlotte M. Carter, Steven Franke, Guy J.G. Paxman, Stewart S.R. Jamieson, Michael J. Bentley, Daniela Jansen, John Paden, Olaf Eisen   +7 more
doaj   +1 more source

Prototype wireless sensors for monitoring subsurface processes in snow and firn

Journal of Glaciology, 2018
The detection and monitoring of meltwater within firn presents a significant monitoring challenge. We explore the potential of small wireless sensors (ETracer+, ET+) to measure temperature, pressure, electrical conductivity and thus the presence or ...
ELIZABETH A. BAGSHAW, NANNA B. KARLSSON, LAI BUN LOK, BEN LISHMAN, LINDSAY CLARE, KEITH W. NICHOLLS, STEVE BURROW, JEMMA L. WADHAM, OLAF EISEN, HUGH CORR, PAUL BRENNAN, DORTHE DAHL-JENSEN   +11 more
doaj   +1 more source

In Situ Demonstration of a Passive Radio Sounding Approach Using the Sun for Echo Detection

IEEE Transactions on Geoscience and Remote Sensing, 2018
Ice sheet contributions to sea level rise present one of the greatest challenges that our society will face in the next century. However, models predicting sea level rise due to ice melt lack critical information regarding processes at the base of ice ...
S. Peters, D. Schroeder, Davide Castelletti, M. Haynes, A. Romero-Wolf   +4 more
semanticscholar   +1 more source

Acidity Levels in Ice Sheets from Radio Echo-Sounding [PDF]

Annals of Glaciology, 1982
It has been suggested (Hammer 1977, Gudmandsen and Overgaard 1978, Millar 1981) that layers of acidic ice, formed after large volcanic eruptions, are a cause of radio echo layering. The power reflection coefficient (PRO of these reflecting layers may be related to their acid content and thickness.
openaire   +1 more source

Integration of Low‐Voltage Nanoscale MoS2 Memristors on CMOS Microchips

Advanced Functional Materials, EarlyView.
This article presents the first monolithic integration of nanoscale MoS2‐based memristors into the back‐end‐of‐line of foundry‐fabricated CMOS microchips in a one‐transistor‐one‐resistor (1T1R) architecture. The MoS2‐based 1T1R cells exhibit forming‐free, nonvolatile resistive switching with ultra‐low operating voltages, low cycle‐to‐cycle variability ...
Jimin Lee, Sofía Cruces, Xiaohua Liu, Yang Chen, Vasilis A. Maroufidis, Janghyun Jo, Lukas Völkel, Dennis Braun, Michael Möller, Leon Brackmann, Holger Kalisch, Michael Heuken, Andrei Vescan, Rafal E. Dunin‐Borkowski, Joachim Mayer, Stefan Wiefels, Max C. Lemme   +16 more
wiley   +1 more source

Exploring canyons beneath Devon Ice Cap for sub-glacial drainage using radar and thermodynamic modeling

Journal of Glaciology
Sub-glacial canyon features up to 580 m deep between flat terraces were identified beneath Devon Ice Cap during a 2023 radar echo sounding (RES) survey.
Chris Pierce, Mark Skidmore, Lucas Beem, Don Blankenship, Ed Adams, Christopher Gerekos   +5 more
doaj   +1 more source

Calibration of a mathematical model of Marukh Glacier, Western Caucasus

Лëд и снег, 2015
Considered in the paper, three-dimentsional mathematical model of dynamics of Marukh Glacier, Western Caucasus. Block structure of the model and interaction between blocs is described.
О. О. Rybak, Е. А. Rybak, S. S. Kutuzov, I. I. Lavrentiev, P. А. Morozova   +4 more
doaj   +1 more source

Thermally Activated Delayed Fluorescence in Phase‐Separated Nanostructures

Advanced Functional Materials, EarlyView.
A supramolecular, phase‐separation driven strategy yields charge transfer (CT) complexes from alternating electron‐deficient pyromellitic diimide and electron‐rich 4,5‐dibromoveratrole. The resulting CT complexes self‐assemble into lamellar nanosheets with nanometer‐sized domains that exhibit thermally activated delayed fluorescence (TADF) at room ...
Bart W.L. van den Bersselaar, Giovanni M. Beneventi, Philip M. Greißel, Lukas A. Mai, Stefan J. D. Maessen, Bas F.M. de Waal, E.W. Meijer, Dirk M. Guldi, Ghislaine Vantomme   +8 more
wiley   +1 more source

Radio echo-sounding of the Antarctic ice sheet.

Journal of the Japanese Society of Snow and Ice, 1989
氷床流動の観測に基づいて, 南極氷床の変動 (例えば, 氷床域の拡大, 縮小) を明らかにすることを目的として, 東南極の東経35度から東経45度に至るみずほ高原地域において, 過去20年にわたって観測が続けられてきた.その結果, 白瀬氷河流域では.年間約70cmもの氷厚の減少が観測された.この氷厚減少から, 白瀬氷河流域の氷床が不安定状態にあることが示唆され, 原因として, 氷床底面での“底面すぺり”が指摘された。そこで, 氷床底面の物理的状態を調べるために電波氷厚計を用いての電波探査が氷床上の流動測定・雪氷観測ルートに沿って, 1982年以降実施された.これまでの電波観測では, 送信時刻と基盤からの反射時刻の時間間隔から氷厚のみを求めていたが, この研究では, 氷床氷の厚さを測定するだけでなく,
openaire   +2 more sources

s‐Orbital Mediated Metavalent Bonding Enables State‐Of‐The‐Art n‐Type AgBiSe2 Thermoelectrics

Advanced Functional Materials, EarlyView.
Metavalent bonding (MVB) underpins the exceptional property portfolio of chalcogenides. Typical MVB solids are mainly found in p‐bonded systems. This work reveals that MVB can also be formed with s‐p orbital interactions upon forming a single‐electron σ‐bond, as exemplified in AgBiSe2.
Binrong Huang, Dasol Kim, Yuan Yu, Jinxuan Zhong, Jianbo Zhu, Yaoling Shen, Yu Guo, Moran Wang, Jiawei Huang, Tu Lyu, Nan Lin, Yongsheng Zhang, Matthias Wuttig, Lipeng Hu   +13 more
wiley   +1 more source