Results 61 to 70 of about 511 (174)

Tropical Solution of Discrete Best Approximation Problems

open access: yesMathematics
We consider discrete best approximation problems in the setting of tropical algebra, which is concerned with the theory and application of algebraic systems with idempotent operations. Given a set of input–output pairs of an unknown function defined on a
Nikolai Krivulin
doaj   +1 more source

Semi-field and indoor setups to study malaria mosquito swarming behavior

open access: yesParasites & Vectors, 2019
Background The recent resurgence of interest in sterile insect techniques to control vector mosquitoes has renewed interest in novel methods for observing mating behavior.
Abdoulaye Niang   +8 more
doaj   +1 more source

On the multiplication groups of semifields

open access: yesEuropean Journal of Combinatorics, 2010
The multiplication group of a loop is the permutation group generated by all right and left multiplications of the loop. The author uses finite semifields (i.e. non-associative division algebras) to obtain loops whose multiplication groups are between \(\text{PSL}(n,q)\) and \(\text{PGL}(n,q)\), for \(n\geq 3 \) and \(q^n>8\); the proof is based on ...
openaire   +2 more sources

Quantifying the impact of Psylliodes chrysocephala injury on the productivity of oilseed rape

open access: yesPest Management Science, Volume 80, Issue 5, Page 2383-2392, May 2024.
The impact of Psylliodes chrysocephala adult and larval damage on oilseed rape yield was quantified to help develop improved thresholds for Integrated Pest Management. Up to 90% leaf area loss (simulated using a hole punch) during early growth did not affect yield.
Duncan J Coston   +5 more
wiley   +1 more source

Breaking the beetle barrier: Innovative strategies for controlling Hylurgus ligniperda in China

open access: yesEcotoxicology and Environmental Safety
Hylurgus ligniperda is a major quarantine pest of forest trees in China. Exploring emergency control techniques in the field can effectively avoid large outbreaks and the spread of H. ligniperda. In this study, H.
Ruting Chen   +5 more
doaj   +1 more source

Central Weak Nucleus Semifields

open access: yesEuropean Journal of Combinatorics, 1981
Using results of S. D. Cohen and the author, we characterize certain infinite families of finite semifields. This yields several infinite families of finite projective planes, all of which have order a power of 3, and which appear to be previously unknown.
openaire   +1 more source

Experimental arena settings might lead to misinterpretation of movement properties

open access: yesInsect Science, Volume 31, Issue 1, Page 271-284, February 2024.
Many studies examine movement in the laboratory and use different laboratory conditions, specifically arenas differing in structure, size, and shape. We examined the effect of the arena structure on movement properties using the red flour beetle as a model. The arena structure greatly affected movement properties, such as movement distance, turn angles,
Inon Scharf   +2 more
wiley   +1 more source

Non-Apis bees as model organisms in laboratory, semi-field and field experiments

open access: yesJournal für Kulturpflanzen, 2020
As part of the registration process of plant protection products (PPPs) and their active substances in the EU, the risk of PPPs for bees has been assessed so far by using the European honey bee (Apis mellifera L.) as a surrogate species.
Anke C. Dietzsch, Tobias Jütte
doaj   +1 more source

Evaluating a new aphid biocontrol agent: The role of aphid density in modulating oviposition behaviour in the American hoverfly, Eupeodes americanus, and the aphid midge, Aphidoletes aphidimyza

open access: yesJournal of Applied Entomology, Volume 148, Issue 1, Page 5-12, February 2024.
Abstract Hoverfly larvae are voracious predators of aphids but have limited dispersal capacity, so their survival depends critically on female selection of oviposition sites. For aphid control purposes, the ability of females to find small aphid colonies is especially valuable.
Noémie Gonzalez   +3 more
wiley   +1 more source

Effects of Gamma Irradiation on Mating Competitiveness of Male Culex quinquefasciatus (Diptera:Culicidae) in Laboratory

open access: yesAtom Indonesia, 2020
Culex quinquefasciatus is the main vector of lymphatic filariasis in Pekalongan City. Sterile Insect Technique (SIT) can be employed as complementary vector control for filariasis.
T. Ramadhani   +5 more
doaj   +1 more source

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