Results 51 to 60 of about 2,033,150 (305)
, 2010 The polar regions have captured the world’s attention, and children’s book authors and publishers are no exception. These dozen titles are just a sample of the bucketload of polar-themed children’s books that have been published during the last couple of
Goldman, Helle
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Polar bear predation on ringed seals in the fast-ice of Hornsund, Svalbard [PDF]
, 1986 Polar bear hunting success on ringed seals in subnivean lairs and basking on the fast ice, was studied in Hornsund, Svalbard. A few bears were observed while actually hunting, but in most cases bear tracks were followed by snowmobile to determine the ...
Gjertz, Ian, Lydersen, Christian
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Evaluation of the Polar Code in different environments and for different maritime activities in the two polar regions [PDF]
, 2020 Because of the decrease in sea ice coverage, maritime activities in the polar regions have increased steadily over the years and several issues related to maritime activities have arisen.
Ozsoy, Burcu, Karahalil, Meric
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Structural and biochemical analysis of a B12 superbinder
FEBS Letters, EarlyView.BtuG proteins are vitamin B12 scavengers in Bacteroides thetaiotaomicron, a dominant human gut bacterium. We present crystal structures of three BtuG homologs bound to cobalamin and its precursor cobinamide, revealing picomolar binding affinities, among the highest known for any natural protein.
Jose M. Martinez Felices +3 more
wiley +1 more source
Polarization-based puncturing pattern selection of shortened Polar code
Dianxin kexue, 2019 In order to solve the problem of inflexible Polar code length,a new puncturing pattern selection scheme based on feedback cost puncturing was proposed to generate shortened Polar codes.In this scheme,the Polarization effect was reserved,the sub-optimal ...
Shunlan LIU, Aiming HU, Jianrong BAO
doaj +2 more sources
Novel polar-coded space-time transmit diversity scheme over Rician fading MIMO channels
EURASIP Journal on Wireless Communications and Networking, 2018 In this paper, a polar-coded space-time transmit diversity (STTD) scheme is proposed in order to improve the performance of multiple-input multiple-output (MIMO) system.
Bowen Feng +4 more
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Optics Express, 2006 Two examples are presented to illustrate the advantages of polarization coded apertures, in which the incoming light will rotate its polarization at a portion of an aperture. In the first example the depth of field of a diffraction limited lens is increased without sacrificing the light throughput; in the second example the axial focal intensity of a ...
Wanli, Chi +2 more
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Blind detection of polar codes [PDF]
2017 IEEE International Workshop on Signal Processing Systems (SiPS), 2017 Polar codes were recently chosen to protect the control channel information in the next-generation mobile communication standard (5G) defined by the 3GPP. As a result, receivers will have to implement blind detection of polar coded frames in order to keep complexity, latency, and power consumption tractable.
Pascal Giard +2 more
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Reading and thinking about International Polar Years: five recent books [PDF]
, 2013 Within the polar science community the Polar (and Geophysical) Years represent signal events. We often read, largely within geoscience literature, that those events represented positive and dramatic steps forward in international science.
Dave Carlson, Carlson, Dave
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FEBS Letters, EarlyView.Mycobacterial 3‐methylcrotonyl‐CoA carboxylase uses a mobile biotin‐carrying domain to shuttle a carboxyl group between two catalytic sites, enabling carboxylation of 3‐methylcrotonyl‐CoA during leucine breakdown. Cryo‐electron microscopy captures the carrier at both sites and reveals an inward loop movement that may prevent futile rebinding to the ...
Ajit Yadav +2 more
wiley +1 more source