92,266 research outputs found
On Z(2)Z(4)[xi]-skew cyclic codes
No full textZ(2)Z(4)-additive codes have been defined as a subgroup of Zr-2 xZ(4)(s) in [6] where Z(2), Z(4) are the rings of integers modulo 2 and 4 respectively and r and s are positive integers. In this study, we define a family of codes over the set Z(2)[(xi) over bar](r) x Z(4)[xi](s) where xi is a root of a monic basic primitive polynomial in Z(4)[x]. We give the standard form of the generator and parity-check matrices of codes over Z(2)[(xi) over bar](r) x Z(4)[xi](s) and also we introduce skew cyclic codes and their spanning sets. Moreover, we study the Gray images of codes over both Z(4)[xi] and Z(2)[(xi) over bar](r) x Z(4)[xi](s) with respect to homogeneous weight and give the necessary and sufficient condition for their Gray images to be a linear code. We further present some examples of optimal codes which are actually Gray images of skew cyclic codes
The Benefits of Being Economics Professor A (and not Z)
No full textAlphabetic name ordering on multi-authored academic papers, which is the convention in the economics discipline and various other disciplines, is to the advantage of people whose last name initials are placed early in the alphabet. As it turns out, Professor A, who has been a first author more often than Professor Z, will have published more articles and experienced afaster growth rate over the course of her career as a result of reputation and visibility. Moreover, authors know that name ordering matters and indeed take ordering seriously: Several characteristics of an author group composition determine the decision to deviate from the default alphabetic name order to a significant extent.performance measurement, incentives, economists, name ordering
Final word on Jersey Dutch
No full textIn this article, William Z. Shetter compares and contrasts the dialects that developed between different Dutch colonies in the New World. He explores in-depth the nuances of Jersey Dutch, and provides theories to explain how Dutch and colonial languages blended. The article is reprinted from American Speech, December 1958, Volum XXXIII, No. 4
Sanctissimi... Clementis Papae XI. Constitutio unigenitus theologicè propugnata : tomus secundus cum Synpsi.
No full textPortada a dos tintas.Texto a dos colSign.:A-B\p4\s,A-Z\p4\s,2A-2Z\p4\s,3A-3Z\p4\s,4A\p4\s,a-x\p2\sPort. con grab.calc.:"I.Freij fe.";viñetas xi
Study of the processes and
No full textUsing decays collected with the BESIII
detector at the BEPCII storage rings, the branching fractions and
angular distributions of the decays and
are measured based on a
partial-reconstruction technique. The decays and
are observed for the first time with statistical
significances of 7 and 15, respectively. The results of this
analysis are in good agreement with previous measurements and have
significantly improved precision.Comment: 10 pages, 3 figures, 4 tables, consistent with the publication in
JHEP06(2022)07
On obstructions to K*( ; Z/2)- orientability
No full textLet be an orientable -plane bundle. Since the seminal work of
Atiyah-Bott-Shapiro, it is well known that is orientable in
K\roman O-theory
if and only if w\sb 2(\xi)=0; similarly, is orientable in
K\roman U-theory
if and only if w\sb 2(\xi) lifts to integral cohomology.
The present paper investigates orientability in mod 2 complex -theory
K\sp*(\;;\bold Z/2).
The author shows that for a spherical fibration
over a CW complex , the primary obstruction to orientability in
K\sp*(\ ;\bold Z/2) is the Stiefel Whitney class
w\sb 1(\xi)\sp 3+w\sb 1(\xi)w\sb 2(\xi)+w\sb 3(\xi).
If, moreover, is orientable
in the usual sense, then w\sb 1(\xi)=0 and so
the primary obstruction is w\sb3(\xi). An analysis is also given of the
secondary obstruction. The proofs use Atiyah-Hirzebruch spectral sequence
calculations.
Presumably, the lack of a commutative multiplication on the spectrum
representing K\sp*(\ ;\bold Z/2) prevents the kind of analysis that Peter
May
and his school have given for -theory orientations
Water-soluble mercury induced by organic amendments affected microbial community assemblage in mercury-polluted paddy soil
No full textMercury (Hg) pollution or organic amendments (OA) may individually induce changes in the microbial community of paddy soils. However, little is known regarding the interaction of Hg and OA and the effect of different OA applications on the microbial community assemblage in Hg-polluted paddy soil. A soil incubation experiment was performed by applying three organic amendments (OA), namely a food waste compost (FC), and its HA and FA, into an Hg-polluted paddy soil to examine the changes in the microbial community and merA/merB gene abundance. The results showed that the OA treatments promoted total (SOC) and dissolved organic carbon (DOC) in soils, which may harbor copiotrophic bacteria. The HA and FA treatments decreased microbial diversity and richness along with an increase of water-soluble Hg (WHg) through the complexation of DOC to Hg, which may be mainly attributed to the enhanced Hg biotoxicity to soil microbiome induced by the increased WHg under these two treatments. Additionally, the WHg enhancement also contributed to the increase of Hg-resistant bacteria and merA/merB gene abundance, and consequently, induced changes in the microbial community. These results indicated the interaction of Hg and different OA induced the variation of WHg fraction in paddy soil, which played a fundamental role in the distinct responses of the microbial community assemblage. Collectively, the application of FA and HA to Hg-polluted soil should be limited considering Hg risk to microbiome, and FC can be an alternative. (C) 2019 Elsevier Ltd. All rights reserved
miRNA-1-3p is an early embryonic male sex-determining factor in the Oriental fruit fly Bactrocera dorsalis
No full textRegulation of male sexual differentiation by a Y chromosome-linked male determining factor (M-factor) is one of a diverse array of sex determination mechanisms found in insects. By deep sequencing of small RNAs from Bactrocera dorsalis early embryos, we identified an autosomal-derived microRNA, miR-1-3p, that has predicted target sites in the transformer gene (Bdtra) required for female sex determination. We further demonstrate by both in vitro and in vivo tests that miR-1-3p suppresses Bdtra expression. Injection of a miR-1-3p mimic in early embryos results in 87–92% phenotypic males, whereas knockdown of miR-1-3p by an inhibitor results in 67–77% phenotypic females. Finally, CRISPR/Cas9-mediated knockout of miR-1-3p results in the expression of female-specific splice variants of Bdtra and doublesex (Bddsx), and induced sex reversal of XY individuals into phenotypic females. These results indicate that miR-1-3p is required for male sex determination in early embryogenesis in B. dorsalis as an intermediate male determiner
Sprawozdanie z XI Międzynarodowego Kongresu Azjatyckiego w Toruniu (23 – 24 V 2024).
No full textSprawozdanie z XI Międzynarodowego Kongresu Azjatyckiego w Toruniu. 
Observation of Hyperon Transverse Polarization in
No full textUsing a sample of decays
collected with the BESIII detector at BEPCII, we report an observation of
transverse polarization with a significance of in the
decay
(,
, ,
). The relative phase of the electric and
magnetic form factors is determined to be rad. This is the first measurement of the relative phase for a
decay into a pair of hyperons. The
decay parameters (, ) and their conjugates
(, ), the angular-distribution
parameter , and the strong-phase difference
for - scattering are measured to be
consistent with previous BESIII results.Comment: 8 pages, 3 figures, consistent with paper published in Phys. Rev. D
(Letter) 106, L091101 (2022
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