Results 71 to 80 of about 1,260,698 (183)

From the predator to the prey: a case study of the vulnerability of Harmonia axyridis to aggressive competitors

open access: yesInsect Science, EarlyView.
The level of aggressiveness of an individual is a factor that shapes intraguild predation (IGP) interactions. In Nabis americoferus, high aggressiveness leads to an increase in attack rate and IGP against Harmonia axyridis. Moreover, the absence of extraguild prey seems to exacerbate IGP. In docile N.
Pierre Royer   +3 more
wiley   +1 more source

The Binet formulas for the Pell and Pell-Lucas p-numbers

open access: yes, 2007
In this paper, we define the Pell and Pell-Lucas p-numbers and derive the analytical formulas for these numbers.
TUĞLU, NAİM, Kocer, E. Gokcen
core   +1 more source

GENERATING FUNCTIONS OF THE PRODUCT OF 2-ORTHOGONAL CHEBYSHEV POLYNOMIALS WITH SOME NUMBERS AND THE OTHER CHEBYSHEV POLYNOMIALS

open access: yesПроблемы анализа, 2020
In this paper, we give the generating functions of binary product between 2-orthogonal Chebyshev polynomials and kFibonacci, k-Pell, k-Jacobsthal numbers and the other orthogonal Chebyshev polynomials.
H. Merzouk, B. Aloui, A. Boussayoud
doaj   +1 more source

Behavioural responses of peach potato aphid, Myzus persicae Sulzer (Hemiptera: Aphididae), to entomopathogenic fungi infected conspecifics

open access: yesAgricultural and Forest Entomology, EarlyView.
Myzus persicae showed no detectable behavioural response to Beauveria bassiana‐colonised agar alone. Aphids spent significantly more time in odour fields containing EPF‐infected conspecifics than healthy aphids, agar or blank air. EPF infection may alter host‐associated odours, suggesting pathogen‐mediated cues could influence aphid behaviour and ...
Ben J. Clunie   +6 more
wiley   +1 more source

Agroecology and Transformative Adaptation to Climate Change

open access: yesAsia Pacific Viewpoint, EarlyView.
ABSTRACT This paper examines transformative adaptation to climate change through the EFICAS Project (Eco‐Friendly Intensification and Climate‐resilient Agricultural Systems) implemented across 12 upland communities in northern Laos from 2014 to 2020.
Jean‐Christophe Castella
wiley   +1 more source

Some Criteria for Class Numbers to Be Non-One

open access: yesJournal of Mathematics, 2020
Let d be a positive integer which is not a perfect square and n be any nonzero fixed integer. Then, the equation x2−dy2=n is known as the general Pell equation. In this paper, we give some criteria for class numbers of certain real quadratic fields to be
Ahmad Issa, Hasan Sankari
doaj   +1 more source

From Loss to Transformation? Towards Pluralistic and Politicised Agrarian‐Climate Futures

open access: yesAsia Pacific Viewpoint, EarlyView.
ABSTRACT Understanding how actors perceive and anticipate future states of the world is gaining traction in climate change governance scholarship and related calls for sustainability transformations. However, smallholder farmers, indigenous groups, and local communities, who are expected to bear disproportionate burdens of loss and damage from climate ...
Joel Persson   +4 more
wiley   +1 more source

The Properties of Binomial Transforms for Modified (s,t)-Pell Matrix Sequence

open access: yesCommunications in Advanced Mathematical Sciences
In this study, we investigate a generalization of the modified Pell sequence, which is called $(s,t)$-modified Pell sequence. By considering this sequence, we define the matrix sequence whose elements are $(s,t)$-modified Pell numbers.
Ozan Haklıdır, Şükran Uygun
doaj   +1 more source

Some Addition Formulas for Fibonacci, Pell and Jacobsthal Numbers

open access: yesAnnales Mathematicae Silesianae, 2019
In this paper, we obtain a closed form for F?i=1k${F_{\sum\nolimits_{i = 1}^k {} }}$, P?i=1k${P_{\sum\nolimits_{i = 1}^k {} }}$and J?i=1k${J_{\sum\nolimits_{i = 1}^k {} }}$ for some positive integers k where Fr, Pr and Jr are the rth Fibonacci, Pell and ...
Bilgici Göksal, Şentürk Tuncay Deniz
doaj   +1 more source

Adaptive Spaces and Rural Futures: Climate Change, Agrarian Dynamics, and Knowledge Politics in Southeast Asian Socioecological Transformations

open access: yesAsia Pacific Viewpoint, EarlyView.
ABSTRACT Contemporary rural change in Southeast Asia is shaped by complex, intersecting forces that defy simplistic narratives. Researchers must therefore develop new ways to grasp nuanced, non‐linear, and locally specific processes to understand how transformational shifts may occur (or not) in the region.
John F. McCarthy   +2 more
wiley   +1 more source

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