نتایج جستجو برای: block structure

تعداد نتایج: 1699975  

1996
CHRIS BERNHARDT

The forcing relation on n-modal cycles is studied. If α is an nmodal cycle then the n-modal cycles with block structure that force α form a 2n-horseshoe above α. If n-modal β forces α, and β does not have a block structure over α, then β forces a 2-horseshoe of simple extensions of α.

2015
Yoad Lewenberg Yonatan Sompolinsky Aviv Zohar

Distributed cryptographic protocols such as Bitcoin and Ethereum use a data structure known as the block chain to synchronize a global log of events between nodes in their network. Blocks, which are batches of updates to the log, reference the parent they are extending, and thus form the structure of a chain. Previous research has shown that the mechanics of the block chain and block propagatio...

Journal: :IEEE Trans. Information Theory 1991
Tadao Kasami Toyoo Takata Toru Fujiwara Shu Lin

In this correspondence, we investigate two important structural properties of block 2tary PSK modulation codes, namely: linear structure and phase symmetry. For an AWGN channel, the error performance of a modulation code depends on its squared Euclidean distance distribution. Linear structure of a code makes the error performance analysis much easier. Phase symmetry of a code is important in re...

2018
Michael Akerman Nada Pejčić Ivan Veličković

The use of truncal nerve blocks has been described since 2001. Since then, there have been many studies trying to understand the ideal clinical scenarios for its use. Since 2001, the transversus abdominis plane block has evolved in many ways including from landmark based technique to ultrasound guided and more recently, into the quadratus lumborum (QL) block. Its anatomical placement, concentra...

Journal: :Journal of hand surgery 1999
B Povlsen A Sirsjö

The effects of guanethidine sympathetic nerve blocks on reperfusion of skeletal muscle was studied in rats. After 3 hours of ischaemia reperfusion was significantly better in animals that had received guanethidine.

Journal: :CoRR 2016
Sheng-Yi Hsu Yuan-fu Lou Chuen-Tsai Sun

The blocks editor, such as the editor in Scratch [13], is widely applied for visual programming languages (VPL) nowadays. Despite it’s friendly for non-programmers, it exists three main limitations while displaying block codes: (1) the readability, (2) the program structure, and (3) the re-use. To cope with these issues, we introduce a novel formatting tool, block shelves, into the editor for o...

Journal: :CoRR 2017
Kwangsu Lee

A block cipher is a bijective function that transforms a plaintext to a ciphertext. A block cipher is a principle component in a cryptosystem because the security of a cryptosystem depends on the security of a block cipher. A Feistel network is the most widely used method to construct a block cipher. This structure has a property such that it can transform a function to a bijective function. Bu...

2004
Donald W. K. Andrews

1 The asymptotic refinements attributable to the block bootstrap for time series are not as large as those of the nonparametric iid bootstrap or the parametric bootstrap. One reason is that the independence between the blocks in the block bootstrap sample does not mimic the dependence structure of the original sample. This is the join-point problem. In this paper, we propose a method of solving...

2004
W. K. ANDREWS DONALD W. K. ANDREWS

The asymptotic refinements attributable to the block bootstrap for time series are not as large as those of the nonparametric iid bootstrap or the parametric bootstrap. One reason is that the independence between the blocks in the block bootstrap sample does not mimic the dependence structure of the original sample. This is the joinpoint problem. In this paper, we propose a method of solving th...

2004
Nebojsa Jojic Vladimir Jojic David Heckerman

Haplotypes, the global patterns of DNA sequence variation, have important implications for identifying complex traits. Recently, blocks of limited haplotype diversity have been discovered in human chromosomes, intensifying the research on modelling the block structure as well as the transitions or co-occurrence of the alleles in these blocks as a way to compress the variability and infer the as...

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