Results 131 to 140 of about 902,097 (310)
Polar bear predation on barrier island bird colonies in Arctic Alaska increases with sea-ice decline
Anthropogenic carbon emissions are warming the Arctic, disrupting ecosystems, and changing the behaviour and interactions of their component species. As summer sea ice diminishes, polar bears (Ursus maritimus) are losing access to traditional seal prey ...
Van der Laan, Anneke +3 more
core +1 more source
, 2009 During recent fieldwork in Svalbard, a well preserved subfossil left mandible of a polar bear (Ursus maritimus Phipps, 1774) was discovered. A 14C age determination shows that it is older than 45 Ky (kilo-years), and an age determination with infrared ...
Wiig, Øystein, Ingólfsson, Ólafur
core +1 more source
LDPC–Polar Code Comparison under 5G NR: Toward Hybrid Coding Schemes for 6G [PDF]
EPJ Web of ConferencesThis article presents an in-depth analysis of the performance of Low-Density Parity-Check (LDPC) codes and polar codes as defined in the 5G NR standard, with a view to their use in 6G communication systems. Simulations were conducted in MATLAB by varying
Aqil Chakir +4 more
doaj +1 more source
FEBS Open Bio, EarlyView.We report the first β‐glucosidase with demonstrated hydrolytic activity on an N‐linked glycopyranoside. The enzyme, native to maize, was biochemically characterised for this novel reaction, and structural modelling of the enzyme–substrate complex revealed several clues to the underlying reduced catalytic rate relative to its native O‐glycopyranoside ...
Hani Gharabli +3 more
wiley +1 more source
Review of The expeditions of the first International Polar Year 1882–83, by William Barr
, 2009 It is probably safe to assume that no readers of Polar Research are unaware that we have just come through a fourth International Polar Year (IPY). All science is, or should be, based on the previous achievements of others, and thus the experiences and ...
Barr, Susan
core +1 more source
Modelling polar bear maternity den habitat in east Svalbard
, 2020 We evaluated a novel tool that predicts possible maternity den habitat of the polar bear (Ursus maritimus) based on a physical snow transport model, a digital terrain model and weather data.
Aars, Jon +2 more
core +1 more source
psp-codes/adaptive-conformation-sampling: Public Release
, 2021 This is the public release of the codes for the project detailed in the manuscript titled "Adaptive Stochastic Optimization to Improve Protein Conformation Sampling".
psp-codes
core +1 more source
Polar Code Appropriateness for Ultra-Reliable and Low-Latency Use Cases of 5G Systems
International Journal of Networked and Distributed Computing (IJNDC)Polar code is considered as a major breakthrough of past decade in channel coding area. The unprecedented performance of polar codes compelled third generation partnership project (3GPP) to adopt the polar codes for control channels functions in one of ...
A. Sharma, M. Salim
doaj +1 more source
Polar codes for distributed hierarchical source coding
Advances in Mathematics of Communications, 2015 We show that polar codes can be used to achieve the rate-distortion functions in the problem of hierarchical source coding also known as the successive refinement problem. We also analyze the distributed version of this problem, constructing a polar coding scheme that achieves the rate distortion functions for successive refinement with side ...
Min Ye 0005, Alexander Barg
openaire +3 more sources
FEBS Open Bio, EarlyView.Biophysical characterisation shows that NanX, a membrane transport protein from the major facilitator superfamily (MFS), forms both monomers and dimers after purification. AlphaFold modelling and substrate docking provide information on residues likely involved in substrate recognition for NanX and another MFS member, NanT.
Michael C. Newton‐Vesty +13 more
wiley +1 more source