Results 51 to 60 of about 936 (209)

A secure semi-field system for the study of Aedes aegypti. [PDF]

open access: yesPLoS Neglected Tropical Diseases, 2011
BACKGROUND: New contained semi-field cages are being developed and used to test novel vector control strategies of dengue and malaria vectors. We herein describe a new Quarantine Insectary Level-2 (QIC-2) laboratory and field cages (James Cook University
Scott A Ritchie   +8 more
doaj   +1 more source

On automorphisms of semifields and semifield planes

open access: yesSibirskie Elektronnye Matematicheskie Izvestiya, 2016
Изучается взаимосвязь полуполевой проективной плоскости и ее координатизирующего полуполя с использованием линейного пространства и регулярного множества. Установлен геометрический смысл инволюторного автоморфизма конечного полуполя, доказаны некоторые его свойства.
openaire   +4 more sources

A survey of finite semifields

open access: yesDiscrete Mathematics, 1999
An algebraic system \(S\) with two binary operations (addition and multiplication) is called a semifield if the following axioms are fulfilled: 1. \((S;+)\) is a group with identity \(0\). 2. If \(a,b\in S\) and \(ab=0\) then \(a=0\) or \(b=0\). 3. If \(a,b,c\in S\) then \(a(b+c)=ab+ac\) and \((a+b)c=ac+bc\). 4.
Minerva Cordero, Gregory P. Wene
openaire   +1 more source

Semifields and a theorem of Abhyankar [PDF]

open access: yesCommentationes Mathematicae Universitatis Carolinae, 2017
Abhyankar proved that every field of finite transcendence degree over $\mathbb{Q}$ or over a finite field is a homomorphic image of a subring of the ring of polynomials $\mathbb{Z}[T_1, \dots, T_n]$ (for some $n$ depending on the field). We conjecture that his result can not be substantially strengthened and show that our conjecture implies a well ...
openaire   +3 more sources

The generalized translation dual of a semifield [PDF]

open access: yes, 2017
In this paper, elaborating on the link between semifields of dimension n over their left nucleus and s-linear sets of rank en disjoint from the secant variety $\Omega({\mathcal S}_{n,n})$ of the Segre variety ${\mathcal S}_{n,n}$ of $PG(n2−1,q)$, $q=se$,
LUNARDON, GUGLIELMO   +9 more
core   +1 more source

Applied statistics in field and semi-field studies with bees

open access: yesJulius-Kühn-Archiv, 2020
Field and semi-field studies are important tools in the ecotoxicological risk assessment of plant protection products for bees (honey bees, bumblebees and solitary bees).
Zumkier, Ulrich   +4 more
doaj   +1 more source

On the semifield planes of order $5^4$ and dimension 2 over the kernel [PDF]

open access: yes, 2003
Enter section title between curly braces In this article we consider the problem of determining all non-Desarguesian semifield planes of order $5^4$ and kernel GF$(5^2)$.
Figueroa, Raul, Cordero, Minerva
core   +2 more sources

Semifield root phenotyping: Root traits for deep nitrate uptake [PDF]

open access: yes, 2022
Deep rooting winter wheat genotypes can reduce nitrate leaching losses and increase N uptake. We aimed to investigate which deep root traits are correlated to deep N uptake and to estimate genetic variation in root traits and deep 15N tracer uptake. In 2
Olga Popovic   +13 more
core   +1 more source

Dihedral and Quaternion Autotopism Subgroups of Semifield Projective Planes of Order $p^4$

open access: yesИзвестия Иркутского государственного университета: Серия "Математика"
Dihedral and Quaternion Autotopism Subgroups of Semifield Projective Planes of Order $p^4$}In 1959, D.R.~Hughes conjecture that the full collineation group of any finite non-Desarguesian semifield projective plane is solvable (see also the question 11.76
O. V. Kravtsova, D. S. Skok
doaj   +1 more source

Semifield planes of order q4 with kernel Fq2 and center Fq [PDF]

open access: yes, 2006
A classification of semifield planes of order $q^4$ with kernel $F_{q^2}$ and center $F_q$ is given. For $q$ odd prime, this proves the conjecture stated in by M.~Cordero and R.~Figueroa.
CARDINALI I.   +8 more
core   +1 more source

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