Results 61 to 70 of about 902,097 (310)

Norway and past International Polar Years—a historical account

open access: yes, 2007
Surveying Norway’s role in past International Polar Years (IPYs), this essay by historian Stian Bones contributes to a broader understanding of Norway as a “polar nation”. He describes the strengths of Norway’s scientific traditions in the polar regions,
Bones, Stian
core   +1 more source

Polar codes with mixed kernels [PDF]

open access: yes2011 IEEE International Symposium on Information Theory Proceedings, 2011
A generalization of the polar coding scheme called mixed-kernels is introduced. This generalization exploits several homogeneous kernels over alphabets of different sizes. An asymptotic analysis of the proposed scheme shows that its polarization properties are strongly related to the ones of the constituent kernels.
Noam Presman, Ofer Shapira, Simon Litsyn
openaire   +2 more sources

Liver organoids: modelling complexity in homeostasis and disease

open access: yesFEBS Letters, EarlyView.
Studying liver in vitro has been challenging because simple 2D cell cultures fail to capture liver's cellular and architectural complexity. To bridge this gap, scientists increasingly use organoids, 3D liver models which better mimic liver composition and function. This review examines recent advances in liver organoid complexity and realism, discusses
Anna M. Dowbaj, Meritxell Huch
wiley   +1 more source

Guest editorial—the ballyhoo over polar bears

open access: yes, 2009
Critics have said that there’s little or no justification for the focus that polar bears (Ursus maritimus) have received as a threatened species. Recent studies project dramatic reductions in polar bear numbers in just a few decades, in concert with the ...
Vongraven, Dag
core   +1 more source

A path splitting and pruning strategy on list decoder for PAC codes

open access: yesIET Communications
Recently, Arıkan proposed a polarization‐adjusted convolutional (PAC) codes, demonstrating their superior error correction performance over polar codes at short block lengths.
Lei Lan, Zhongpeng Wang, Lijuan Zhang
doaj   +1 more source

Noncoherent Detection With Polar Codes

open access: yesIEEE Access, 2019
Polar codes (PCs) have attracted significant attention in the last decade, especially after their adoption in the forthcoming 5G wireless networks. However, previous studies focused on coherent polar codes, which always rely on the strong assumption of ...
Chaofan Chen   +5 more
doaj   +1 more source

Interleaved Polar (I-Polar) Codes [PDF]

open access: yesIEEE Transactions on Information Theory, 2020
31 pages, 12 ...
openaire   +4 more sources

Blind detection of polar codes [PDF]

open access: yes2017 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
openaire   +2 more sources

Golgi enzymes are retrieved from the plasma membrane to the trans‐Golgi network

open access: yesFEBS Letters, EarlyView.
Golgi enzymes are traditionally considered resident proteins retained within the Golgi apparatus. Here, we demonstrate that a subset transiently reaches the cell surface and is subsequently retrieved to the trans‐Golgi network via retrograde transport. Using a nanobody‐based toolkit, we uncover a dynamic trafficking cycle of several Golgi enzymes.
Dominik P. Buser, Tina Junne
wiley   +1 more source

SC-Fano Decoding of Polar Codes

open access: yesIEEE Access, 2019
For finite-length polar codes, the standard successive cancellation (SC) decoding has been improved, such as SC-List (SCL), SC-Stack (SCS), and SC-Flip (SCF) decodings.
Min-Oh Jeong, Song-Nam Hong
doaj   +1 more source

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