Results 81 to 90 of about 81,048 (231)

The properties of amalgamation and joint embedding in the meaning of positive Jonsson theories

Kazakh Mathematical Journal
In this paper, we study special subclasses of theories on the basis of the connection between the amalgamation property and the joint embedding property, as well as between the h-amalgamation property and the joint continuation property. Our results are presented in both the classical first-order logic and positive logic, which exhibit a parallel ...
Sultan Amanbekov, Ayabat Onerkhaan, Indira Tungushbayeva   +2 more
openaire   +1 more source

Between the LIL and the LSL

, 2010
In two earlier papers, two of the present authors (A.G. and U.S.) extended Lai's [Ann. Probab. 2 (1974) 432--440] law of the single logarithm for delayed sums to a multiindex setting in which the edges of the $\mathbf{n}$th window grow like $|\mathbf {n}|
Gut, Allan, Jonsson, Fredrik, Stadtmüller, Ulrich   +2 more
core   +1 more source

Effects of temperature and browning on the functional response of a freshwater top predator

Journal of Animal Ecology, EarlyView.
This study explores for the first time how temperature and browning affect the functional response of a freshwater piscivore, the northern pike. The authors find surprisingly weak effects of browning, challenging visual foraging theory. Pike displayed a rare dome‐shaped functional response in cold clear water, potentially driven by seasonal changes in ...
Viktor Nilsson‐Örtman, Erik Nilsson, Christer Brönmark   +2 more
wiley   +1 more source

Contrasting properties of predation and scavenging networks governed by megaherbivores in an African savannah

Journal of Animal Ecology, EarlyView.
For the first time, predation and scavenging networks are directly compared within a single ecosystem. Using an 8‐year dataset of African mammals, including megaherbivores, this study reveals distinct structural rules and body mass constraints, providing a scalable framework for studying consumer–resource dynamics and ecosystem function.
Solange Alexandra Batista‐Nunes, Esther Sebastián‐González, Femke Broekhuis, Frank van Langevelde, Niels Mogensen, Marcos Moleón   +5 more
wiley   +1 more source

On closure operators of Jonsson sets

Қарағанды университетінің хабаршысы. Математика сериясы
The work is related to the study of the model-theoretic properties of Jonsson theories, which, generally speaking, are not complete. In the article, on the Boolean of Jonsson subsets of the semantic model of some fixed Jonsson theory, the concept of the
Olga Ulbrikht
doaj   +1 more source

Exploring marking methods for the predatory hoverfly Sphaerophoria rueppellii (Diptera: Syrphidae)

Insect Science, EarlyView.
As important pollinators and predators of aphids, hoverflies play an important role in ecosystems. This study focuses on identifying the best marking technique for the model species Sphaerophoria rueppellii that can be used to track hoverfly feeding and oviposition sites, evaluating three methods: rubidium (RbCl), fluorescein, and fluorescent dusts ...
Michele Violi, Elena Costi, Elena Monari, Daniele Sommaggio, Lara Maistrello   +4 more
wiley   +1 more source

Model-theoretic properties of J-superstable Jonsson theories in classes defined by cosemanticness

Қарағанды университетінің хабаршысы. Математика сериясы
This article deals with the problems of model-theoretic characterization of J-superstable Jonsson theories. The characteristic features of such theories are analyzed in terms of J-stability, J-P-superstability, and J-nonmultidimensionality.
A.R. Yeshkeyev, G.E. Zhumabekova, A.K. Issayeva   +2 more
doaj   +1 more source

Museomics Deciphers the Phylogeographic Differentiation and Conservation Status of a Montane Pheasant

Integrative Zoology, EarlyView.
Museum specimens provide a rich source of historical DNA, enabling insights into phylogenetic relationships and demographic history of the endangered Koklass Pheasant. Our findings uncovered a previously unrecognized population in Guizhou province and highlighted elevated extinction risk in populations from Anhui province and Southern China, informing ...
Zhiyong Jiang, Yalin Cheng, Shuai Zhang, Wenqing Zang, Peng He, Dezhi Zhang, Jinjuan Mei, Peng Cui, Yanhua Qu, Hailong Wu   +9 more
wiley   +1 more source

Responsible Accountability? Multi‐Stakeholder Partnerships, Sustainable Development and Global Health

Global Policy, EarlyView.
ABSTRACT Following the adoption of the 2030 Agenda for Sustainable Development, multi‐stakeholder partnerships (MSPs) have received renewed political attention. In several policy fields, MSPs have been criticized for a lack of accountability, resulting in efforts to redress this problem.
Matteo De Donà, Kristina Jönsson
wiley   +1 more source

Annual flower strips under the ‘Sweden Blossom’ initiative – how do they perform for pollinators, natural enemies and herbivores?

Agricultural and Forest Entomology, EarlyView.
Pollinator‐targeted annual flower strips increase abundances of pollinators but also natural enemies and herbivores. Natural enemies and herbivores disperse in a taxon‐specific manner into nearby crops. Pest control by ground‐dwellers slightly increases in crop areas near the flower strips.
Neus Rodríguez‐Gasol, Ola Lundin, Elodie Chapurlat, Mattias Hammarstedt, Mattias Jonsson, Johan A. Stenberg, Maria Viketoft   +6 more
wiley   +1 more source