Results 11 to 20 of about 2,891,099 (365)
BMJ Global Health, 2021 Background Previous review studies have not systematically mapped the existing body of knowledge on adolescent sexual and reproductive health (ASRH) in sub-Saharan Africa (SSA).
Anthony Idowu Ajayi +4 more
doaj +1 more source
Experimental evolution of a pheromone signal
Ecology and Evolution, 2022 Sexual signals are important in speciation, but understanding their evolution is complex as these signals are often composed of multiple, genetically interdependent components.
Thomas Blankers +3 more
doaj +1 more source
Effect of HIV status on fertility intention and contraceptive use among women in nine sub-Saharan African countries: evidence from Demographic and Health Surveys [PDF]
Global Health Action, 2014 Background: Expanding access to antiretroviral therapy (ART) means that HIV is no longer a death sentence. This change has implications for reproductive decisions and behaviors of HIV-infected individuals.
Joyce N. Mumah +2 more
doaj +1 more source
Extinction in population dynamics [PDF]
Physical Review E, 2004 We study a generic reaction-diffusion model for single-species population dynamics that includes reproduction, death, and competition. The population is assumed to be confined in a refuge beyond which conditions are so harsh that they lead to certain extinction.
Javier Buceta +3 more
openaire +4 more sources
Interactions With Plant Defences Isolate Sympatric Populations of an Herbivorous Mite
Frontiers in Ecology and Evolution, 2022 Host plant specialisation can promote evolutionary divergence between herbivore populations associated with different plant species. While the mechanisms by which specialist species exploit their hosts have been studied widely across taxa, less is known ...
Ernesto Villacis-Perez +6 more
doaj +1 more source
BMC Public Health, 2020 Background Of all lifestyle behaviours, smoking caused the most deaths in the last century. Because of the time lag between the act of smoking and dying from smoking, and because males generally take up smoking before females do, male and female smoking ...
Maarten Wensink +4 more
doaj +1 more source
BMJ Open, 2023 Introduction Global morbidity from enteric infections and diarrhoea remains high in children in low-income and middle-income countries, despite significant investment over recent decades in health systems and water and sanitation infrastructure.
Blessing Mberu +14 more
doaj +1 more source
Juvenile Spider Mites Induce Salicylate Defenses, but Not Jasmonate Defenses, Unlike Adults
Frontiers in Plant Science, 2020 When plants detect herbivores they strengthen their defenses. As a consequence, some herbivores evolved the means to suppress these defenses. Research on induction and suppression of plant defenses usually makes use of particular life stages of ...
Jie Liu +7 more
doaj +1 more source
Constrained distributed optimization : A population dynamics approach [PDF]
, 2016 Large-scale network systems involve a large number of states, which makes the design of real-time controllers a challenging task. A distributed controller design allows to reduce computational requirements since tasks are divided into different systems ...
Barreiro Gómez, Julián +2 more
core +2 more sources
Stratification in health and survival after age 100: evidence from Danish centenarians
BMC Geriatrics, 2021 Background The existence of a super-select group of centenarians that demonstrates increased survivorship has been hypothesized. However, it is unknown if this super-select group possesses similar characteristics apart from extreme longevity.
Jesús-Adrián Alvarez +4 more
doaj +1 more source