Search Results - "Harada, Masaaki"
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Construction of binary LCD codes, ternary LCD codes and quaternary Hermitian LCD codes
Published in Designs, codes, and cryptography (01-10-2021)“…We give two methods for constructing many linear complementary dual (LCD for short) codes from a given LCD code, by modifying some known methods for…”
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A method for constructing quaternary Hermitian self-dual codes and an application to quantum codes
Published in Designs, codes, and cryptography (2024)“…We introduce quaternary modified four μ -circulant codes as a modification of four circulant codes. We give basic properties of quaternary modified four μ…”
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Characterization and classification of optimal LCD codes
Published in Designs, codes, and cryptography (01-04-2021)“…Linear complementary dual (LCD) codes are linear codes that intersect with their dual trivially. We give a characterization of LCD codes over F q having large…”
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Some restrictions on the weight enumerators of near-extremal ternary self-dual codes and quaternary Hermitian self-dual codes
Published in Designs, codes, and cryptography (01-05-2023)“…We give restrictions on the weight enumerators of ternary near-extremal self-dual codes of length divisible by 12 and quaternary near-extremal Hermitian…”
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Quaternary Hermitian Linear Complementary Dual Codes
Published in IEEE transactions on information theory (01-05-2020)“…The largest minimum weights among quaternary Hermitian linear complementary dual codes are known for dimension 2. In this paper, we give some conditions on the…”
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On the minimum weights of binary linear complementary dual codes
Published in Cryptography and communications (01-03-2020)“…Linear complementary dual codes (or codes with complementary duals) are codes whose intersections with their dual codes are trivial. We study the largest…”
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On the minimum weights of binary LCD codes and ternary LCD codes
Published in Finite fields and their applications (01-12-2021)“…Linear complementary dual (LCD) codes are linear codes that intersect with their dual codes trivially. We study the largest minimum weight d2(n,k) among all…”
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Hadamard matrices related to a certain series of ternary self-dual codes
Published in Designs, codes, and cryptography (01-03-2023)“…In 2013, Nebe and Villar gave a series of ternary self-dual codes of length 2 ( p + 1 ) for a prime p congruent to 5 modulo 8. As a consequence, the third…”
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On the classification of quaternary optimal Hermitian LCD codes
Published in Cryptography and communications (2022)“…We propose a method for classifying quaternary Hermitian LCD codes having large minimum weights. For example, we classify quaternary optimal Hermitian LCD…”
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Ternary Extremal Four-Negacirculant Self-Dual Codes
Published in Graphs and combinatorics (01-05-2024)“…In this note, we complete a classification of ternary extremal four-negacirculant self-dual codes of lengths 40, 44, 48, 52 and 60…”
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On the classification of skew Hadamard matrices of order 36 and related structures
Published in Designs, codes, and cryptography (2024)“…Two skew Hadamard matrices are considered SH-equivalent if they are similar by a signed permutation matrix. This paper determines the number of SH-inequivalent…”
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Quasi-unbiased Hadamard matrices and weakly unbiased Hadamard matrices: A coding-theoretic approach
Published in Mathematics of computation (01-03-2017)“…This paper is concerned with quasi-unbiased Hadamard matrices and weakly unbiased Hadamard matrices, which are generalizations of unbiased Hadamard matrices,…”
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On the existence of extremal Type II ℤ_{2 }-codes
Published in Mathematics of computation (01-05-2014)“…For lengths 8 8 , 16 16 , and 24 24 , it is known that there is an extremal Type II Z 2 k \mathbb {Z}_{2k} -code for every positive integer k k . In this…”
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On extremal double circulant self-dual codes of lengths 90–96
Published in Applicable algebra in engineering, communication and computing (01-11-2019)Get full text
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Classification of Quaternary Hermitian Self-Dual Codes of Length 20
Published in IEEE transactions on information theory (01-06-2011)“…A classification of quaternary Hermitian self-dual codes of length 20 is given. Using this classification, a classification of extremal quaternary Hermitian…”
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A neutrophil elastase inhibitor improves lung function during ex vivo lung perfusion
Published in General thoracic and cardiovascular surgery (01-12-2015)“…Objective Ex vivo lung perfusion (EVLP) has been used not only for graft evaluation but also for graft reconditioning prior to lung transplantation…”
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On the classification of weighing matrices and self-orthogonal codes
Published in Journal of combinatorial designs (01-01-2012)“…We provide a classification method of weighing matrices based on a classification of self‐orthogonal codes. Using this method, we classify weighing matrices of…”
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Self-dual codes over F 5 and s-extremal unimodular lattices
Published in Discrete mathematics (01-01-2023)Get full text
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Self-dual codes over F5 and s-extremal unimodular lattices
Published in Discrete mathematics (01-01-2023)“…New s-extremal extremal unimodular lattices in dimensions 38, 40, 42 and 44 are constructed from self-dual codes over F5 by Construction A. In the process of…”
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Effect of donor pre-mortem hypoxia and hypotension on graft function and start of warm ischemia in donation after cardiac death lung transplantation
Published in The Journal of heart and lung transplantation (01-04-2011)“…Background The start of warm ischemic time (WIT) of donor lungs in donation after cardiac death (DCD) is not clearly defined. We investigated the effect of…”
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