Results 1 to 10 of about 415,013 (243)

Harvesting in seasonal environments

Journal of Mathematical Biology, 2004
Most harvest theory is based on an assumption of a constant or stochastic environment, yet most populations experience some form of environmental seasonality. Assuming that a population follows logistic growth we investigate harvesting in seasonal environments, focusing on maximum annual yield (M.A.Y.) and population persistence under five commonly ...
Xu, Cailin, Boyce, Mark S, Daley, Daryl
openaire   +3 more sources

In-Season Transshipments Among Competitive Retailers [PDF]

Manufacturing & Service Operations Management, 2012
A decentralized system of competing retailers that order and sell the same product in a sales season is studied. When a customer demand occurs at a stocked-out retailer, that retailer requests a unit to be transshipped from another retailer who charges a transshipment price.
Comez, N., Stecke, K. E., Cakanyildirim, M.   +2 more
openaire   +4 more sources

Sleep in seasonal affective disorder

Current Opinion in Psychology, 2020
Sleep in seasonal affective disorder (SAD) has been primarily characterized by delayed sleep timing and self-reports of hypersomnolence. It is unclear whether delayed sleep timing is due to circadian or behavioral misalignment and if effective treatments operate independently of the circadian system.
Delainey L Wescott, Adriane M Soehner, Kathryn A Roecklein   +2 more
openaire   +3 more sources

Pharmacokinetic considerations in seasonal malaria chemoprevention

Trends in Parasitology, 2022
Los niños africanos menores de 5 años soportan la principal carga de la mortalidad mundial por malaria. La quimioprevención estacional de la malaria (SMC) con sulfadoxina-pirimetamina (SP) más amodiaquina (AQ) administrada mensualmente durante la temporada de lluvias es una intervención altamente efectiva contra la malaria para niños de entre 3 meses y
Chotsiri, P, White, NJ, Tarning, J
openaire   +2 more sources

Insight in seasonal affective disorder

Comprehensive Psychiatry, 1997
Lack of insight complicates the evaluation and treatment of patients with psychotic and affective disorders. No studies of insight in seasonal affective disorder (SAD) have been reported. Thirty patients with SAD diagnosed by the Structured Clinical Interview for DSM-III-R but no other axis I conditions were treated short-term with light-therapy ...
S N, Ghaemi, G S, Sachs, C F, Baldassano, C J, Truman   +3 more
openaire   +2 more sources

Persistence in seasonally forced epidemiological models [PDF]

Journal of Mathematical Biology, 2011
In this paper we address the persistence of a class of seasonally forced epidemiological models. We use an abstract theorem about persistence by Fonda. Five different examples of application are given.
Rebelo, C., Margheri, A., /Bacaër, Nicolas   +2 more
openaire   +3 more sources

Testing a General Theory for Optimal Flowering Time in Deciduous Perennial Plants as a Function of Growing Season Length. [PDF]

Ecol Lett
Park JS, Jackson J, Bergsten A, Ågren J.   +3 more
europepmc   +1 more source

Artificial light at night extends pollen season and elevates allergen exposure. [PDF]

PNAS Nexus
Geist B, Meng L, Katz DSW, Li H, Hölker F, Xiao Q.   +5 more
europepmc   +1 more source

Decomposition and nutrient release from leaves of some common agroforestry tree/shrub species of Sudano-Sahelian West Africa. [PDF]

Sci Rep
Fané S, Agbotui DK, Ingold M, Ndiaye C, Sanogo S, Buerkert A.   +5 more
europepmc   +1 more source

Diet Switching and Interspecific Competition in Sympatric Steppe Ungulates Under Seasonal Resource Variability. [PDF]

Ecol Evol
Dong H, Feng B, Yang S, Jia Y, Qin M, Bai W.   +5 more
europepmc   +1 more source