Results 51 to 60 of about 31,420 (299)

Radio-Echo Sounding: Focusing Effects in Wavy Strata [PDF]

Geophysical Journal International, 1971
Summary An airborne radio-echo sounding system, employing a wide downward-looking beam, has produced records of the Antarctic ice sheet containing fault-like, near-vertical lines through the strata of partially-reflecting layers within the ice. It is shown that interpretation of these lines as near-vertical faults is in general incorrect, and a more
openaire   +1 more source

A Digital Radio Echo-Sounding and Navigation Recording System [PDF]

Annals of Glaciology, 1987
The Scott Polar Research Institute (SPRI) Mk IV 60 MHz radio echo-sounding (RES) system has proven itself to be a most effective and versatile tool in glaciology. During the last 15 years, it has been used from a variety of platforms, both surface and airborne, and over a range of ice thicknesses from 4000 m to 100 m.
M.R. Gorman, A.P.R. Cooper
openaire   +1 more source

Mycobacterial cell division arrest and smooth‐to‐rough envelope transition using CRISPRi‐mediated genetic repression systems

FEBS Open Bio, EarlyView.
CRISPRI‐mediated gene silencing and phenotypic exploration in nontuberculous mycobacteria. In this Research Protocol, we describe approaches to control, monitor, and quantitatively assess CRISPRI‐mediated gene silencing in M. smegmatis and M. abscessus model organisms.
Vanessa Point, Wafaa Achache, Janïs Laudouze, Eliana Sepulveda Ramos, Mickaël Maziero, Céline Crauste, Stéphane Canaan, Pierre Santucci   +7 more
wiley   +1 more source

Deriving iceberg ablation rates using an on-iceberg autonomous phase-sensitive radar (ApRES)

Annals of Glaciology
The increase in iceberg discharge into the polar oceans highlights the importance of understanding how quickly icebergs are deteriorating and where the resulting freshwater injection is occurring.
Kristin M. Schild, Irena Vaňková, David A. Sutherland, Keith Nicholls   +3 more
doaj   +1 more source

The effects of crustal magnetic fields and solar EUV flux on ionopause formation at Mars

, 2019
We study the ionopause of Mars using a database of 6,893 ionopause detections obtained over 11 years by the MARSIS (Mars Advanced Radar for Subsurface and Ionosphere Sounding) experiment.
Chu, F., Duru, F., Girazian, Z., Gurnett, D. A., Halekas, J., Kopf, A. J., Morgan, D. D., Thiemann, E. M. B.   +7 more
core   +1 more source

Characterization of Defect Distribution in an Additively Manufactured AlSi10Mg as a Function of Processing Parameters and Correlations with Extreme Value Statistics

Advanced Engineering Materials, EarlyView.
Predicting extreme defects in additive manufacturing remains a key challenge limiting its structural reliability. This study proposes a statistical framework that integrates Extreme Value Theory with advanced process indicators to explore defect–process relationships and improve the estimation of critical defect sizes. The approach provides a basis for
Muhammad Muteeb Butt, Varma Kvvssn, Hossein Laieghi, Zia Uddin, Peyman Ansari, E. Kıvanç Sadak, Can Barış Toprak, Hüseyin Kızıl, Enrico Salvati   +8 more
wiley   +1 more source

Comparing numerical ice-sheet model output with radio-echo sounding measurements in the Weddell Sea sector of West Antarctica

Annals of Glaciology, 2020
Numerical ice-sheet models are commonly matched to surface ice velocities from InSAR measurements by modifying basal drag, allowing the flow and form of the ice sheet to be simulated. Geophysical measurements of the bed are rarely used to examine if this
Hafeez Jeofry, Neil Ross, Martin J. Siegert   +2 more
doaj   +1 more source

Internal Structure of Ariebreen, Spitsbergen, from radio-echo sounding data [PDF]

, 2008
Ariebreen (77º 01' N, 15º 29' E) is a small valley glacier (ca. 0.36 km2 in August 2007) located at Hornsund, Spitsbergen, Svalbard, ca. 2.5 km to the west of Hornsund Polish Polar Station.
Gabriec, M., Jonsell, Ulf, Navarro Valero, Francisco Jose, Nawrot, A., Puczko, D.   +4 more
core   +1 more source

Deep learning for face detection using matlab [PDF]

, 2020
This project report presents face detection using Convolutional Neural Network algorithm and Deep Learning combination (DCT / DL) throughout MATLAB simulation and modeling.
Slim, Salim Adnan
core  

Miniature high-power impulse transmitter for radio-echo sounding [PDF]

Journal of Glaciology, 1994
AbstractWe have developed a miniature high-power impulse transmitter for radio-echo sounding of glaciers. It features two synchronous second break-down pulse generators operating in a differential configuration. Specifications include bipolar 550 V pulses having rise times less than 2 ns, 512 Hz repetition rate, 180 mA at 10-14 V d.c.
B. Barry Narod, Garry K.C. Clarke
openaire   +1 more source