Results 11 to 20 of about 1,675,688 (289)

Geographical and temporal variation of suicide in India, 2006–2015: An investigation of factors associated with suicide risk difference across states/union territories

open access: yesIndian Journal of Psychological Medicine, 2019
Background: In India, about 130,000 people died by suicide in the year 2015. It is important to understand the variation of suicide across different parts of India and the trend of suicide rates over the years.
Parthasarathy Ramamurthy   +1 more
doaj   +1 more source

Evolution of Helping and Harming in Viscous Populations When Group Size Varies [PDF]

open access: yes, 2013
Funding: Balliol College and the Royal Society.Recent years have seen huge interest in understanding how demographic factors mediate the evolution of social behavior in viscous populations.
Gardner, Andy, Rodrigues, Antonio M. M.
core   +1 more source

Spatio-temporal variation of conversational utterances on Twitter [PDF]

open access: yes, 2013
Conversations reflect the existing norms of a language. Previously, we found that utterance lengths in English fictional conversations in books and movies have shortened over a period of 200 years.
Alis, Christian M., Lim, May T.
core   +4 more sources

Long-Term Air Quality Study in Fairbanks, Alaska: Air Pollutant Temporal Variations, Correlations, and PM2.5 Source Apportionment

open access: yesAtmosphere, 2020
As one of the most polluted U.S. cities, Fairbanks was reclassified as a “serious” nonattainment area by the Environmental Protection Agency (EPA) in 2017 for its fine particulate matter (PM2.5) pollution.
Lexuan Ye, Yungang Wang
doaj   +1 more source

Urbanization, environmental stabilization and temporal persistence of bird species: A view from Latin America [PDF]

open access: yes, 2018
Background. A scarcely studied consequence of urbanization is the effect of temporal stabilization of the environment on bird communities. This alteration is thought to dampen environmental variations between day and night, seasons and years, promoting a
Leveau, Lucas Matias
core   +2 more sources

Trophic structure of fish assemblages associated with macrophytes in lakes of an abandoned meander on the middle river Purus, brazilian Amazon

open access: yesActa Scientiarum: Biological Sciences, 2016
The trophic structure of fish assemblages associated with banks of aquatic macrophytes in abandoned meander lakes on the river Purus is investigated. Comparisons between lakes and between different periods of the hydrological cycle are undertaken.
Monik da Silveira Suçuarana   +2 more
doaj   +1 more source

Comparison of Seasonal and Diurnal Concentration Profiles of BVOCs in Coniferous and Deciduous Forests

open access: yesAtmosphere, 2023
Ambient atmospheric concentrations of isoprene and monoterpenes were measured at two forest sites, one deciduous and one coniferous, over the year 2022. Both sites in a regional area were sampled monthly between April and September.
Helko Borsdorf   +4 more
doaj   +1 more source

Temporal and spatial variation on heavy metal concentrations in the bivalve Perna perna (LINNAEUS, 1758) on the northern coast of Rio de Janeiro State, Brazil

open access: yesBrazilian Archives of Biology and Technology, 2004
Heavy metal (Cd, Cr, Cu, Fe, Mn, Ni, Pb and Zn) concentrations were studied in Perna perna from three beaches (Barra do Furado, Buena and Ponta do Retiro) on the northern coast of Rio de Janeiro State by ICP-AES. The average concentration was 0.3 ± 0.04 (
Alexandre Gomes Ferreira   +2 more
doaj   +1 more source

The selective advantage of reaction norms for environmental tolerance [PDF]

open access: yes, 1992
A tolerance curve defines the dependence of a genotype's fitness on the state of an environmental gradient. It can be characterized by a mode (the genotype's optimal environment) and a width (the breadth of adaptation). It seems possible that one or both
Gabriel, Wilfried, Lynch, Michael
core   +1 more source

Temporal and spatial variation of limnological variables and biomass of different macrophyte species in a Neotropical reservoir (São Paulo - Brazil) [PDF]

open access: yes, 2013
Aim: This study reports an investigation of limnological characteristics and aquatic macrophyte occurrence in a neotropical reservoir in order to assess the spatio-temporal variation of water and sediment variables and their influence on plant ...
Bottino, Flávia   +2 more
core   +2 more sources

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