Results 111 to 120 of about 83,235 (283)

Stability of equilibria in quantitative genetic models based on modified-gradient systems

Journal of Biological Dynamics, 2018
Motivated by questions in biology, we investigate the stability of equilibria of the dynamical system $ \mathbf {x}^{\prime }=P(t)\nabla f(x) $ which arise as critical points of f, under the assumption that $ P(t) $ is positive semi-definite. It is shown
Benjamin J. Ridenhour, Jerry R. Ridenhour   +1 more
doaj   +1 more source

Update on Ouratea cidiana Sastre (Ochnaceae), a microendemic species from the Amazon: enlightening the identity and conservation status

Nordic Journal of Botany, EarlyView.
Ouratea cidiana (Ochnaceae) is a microendemic shrub species from the Brazilian Amazonia, occurring along the banks of the Trombetas River and restricted to the Cachoeira Porteira region, in western Pará State. Since the original collection nearly forty years ago, no additional records have been made, which is concerning given the continuous decline in ...
Clebiana de Sá Nunes, Mayara Dias Caldas, Fúvio Rubens Oliveira‐da‐ Silva, Anna Luiza Ilkiu‐ Borges, André dos Santos Bragança Gil   +4 more
wiley   +1 more source

Do cultural taboos regulate hunting in transitioning Indigenous communities? The case of the Idu Mishmi of Northeast India

People and Nature, EarlyView.
Abstract There is rising recognition of resource‐use rights of Indigenous Peoples and Local Communities (IPLCs) within wildlife conservation. Historically, sociocultural institutions ensured wildlife sustainability in many IPLC areas. However, the future viability of such institutions is uncertain as IPLCs change in response to external pressures and ...
Sahil Nijhawan, Achili Mihu, Iho Tapo, Alinji Rondo, Jibi Pulu, Marcus Rowcliffe   +5 more
wiley   +1 more source

Chaotic Dynamics Analysis and FPGA Implementation Based on Gauss Legendre Integral

Mathematics
In this paper, we first design the corresponding integration algorithm and matlab program according to the Gauss–Legendre integration principle. Then, we select the Lorenz system, the Duffing system, the hidden attractor chaotic system and the Multi-wing
Li Wen, Li Cui, Hairong Lin, Fei Yu
doaj   +1 more source

Multistability and variations in basin of attraction in power-grid systems

New Journal of Physics, 2018
Power grids sustain modern society by supplying electricity and thus their stability is a crucial factor for our civilization. The dynamic stability of a power grid is usually quantified by the probability of its nodes’ recovery to phase synchronization ...
Heetae Kim, Sang Hoon Lee, Jörn Davidsen, Seung-Woo Son   +3 more
doaj   +1 more source

Colonization and spatiotemporal distribution of bruchid pests in lentil and faba bean fields

Pest Management Science, EarlyView.
This study of 104 fields identifies Bruchus signaticornis in lentils and B. rufimanus in faba beans as the sole grain‐damaging species. Their uniform distribution within fields and the strong effect of regulatory factors on larvae and egg survival emphasize the need for species‐specific, phenology‐based and spatially informed integrated pest management
Anastasia Chery‐Lagrange, Antoine Gardarin, Yann Tricault, Mélissandre Gabet, Jean‐David Chapelin‐Viscardi, Cayetano Herrera, Anne‐Sophie Voisin, Laurent Bedoussac   +7 more
wiley   +1 more source

Multistability Mechanisms for Improving the Performance of a Piezoelectric Energy Harvester with Geometric Nonlinearities

Fractal and Fractional
This study presents multistability mechanisms that can enhance the energy harvesting performance of a piezoelectric energy harvester (PEH) with geometrical nonlinearities. To configure triple potential wells, static bifurcation diagrams in the structural
Zhenhua Wang, Huilin Shang
doaj   +1 more source

Host phenology‐driven infestation patterns of the carob moth (Ectomyelois ceratoniae) in Mediterranean walnut orchards: insights from comparison with codling moth (Cydia pomonella)

Pest Management Science, EarlyView.
In Mediterranean walnut orchards, Ectomyelois ceratoniae replaces Cydia pomonella as the primary pest. Capture peaks between packing tissue brown (PTB) stage and husk dehiscence define a critical window for monitoring and early harvest to prevent kernel infestation.
Fortuna Miele, Flavia de Benedetta, Enza Petito, Giovanna Avventura, Francesco Migliaccio, Francesco Nugnes, Umberto Bernardo   +6 more
wiley   +1 more source

Synergistic attraction: Development and field evaluation of a multicomponent lure for Zeugodacus cucurbitae based on host‐plant volatiles and gut bacterium‐derived volatiles

Pest Management Science, EarlyView.
The newly developed ternary blend was validated in field trials and proved highly effective in attracting both male and female Zeugodacus cucurbitae. Abstract BACKGROUND Zeugodacus cucurbitae is a global quarantine pest. Management of this pest relies heavily on chemical insecticides, which impose substantial environmental burdens. Male‐specific lures [
Jinhua Li, Guangmei Chen, Yang Yue, Jingjing Wang, Yanan Liu, Zhenya Tian, Jingfang Yang, Bin Zhang, Zhongshi Zhou   +8 more
wiley   +1 more source

Turbulent snow transport and accumulation: New reduced‐order models and diagnostics

Quarterly Journal of the Royal Meteorological Society, EarlyView.
Our new reduced‐order models of snow particle transport provide high‐fidelity calculations of snow accumulation in turbulent flows at significantly reduced computational costs. Additional accumulation diagnostics from the reduced‐order model predict complex patterns of particle concentration in turbulent boundary layers via coherent flow structures in ...
Nikolas O. Aksamit, Alex P. Encinas‐Bartos, Holt Hancock, Alexander Prokop   +3 more
wiley   +1 more source