Results 291 to 300 of about 3,945,589 (324)

Coevolution in Temporally Variable Environments

The American Naturalist, 2003
Many potentially mutualistic interactions are conditional, with selection that varies between mutualism and antagonism over space and time. We develop a genetic model of temporally variable coevolution that incorporates stochastic fluctuations between mutualism and antagonism.
Scott L, Nuismer, Richard, Gomulkiewicz, Martin T, Morgan   +2 more
openaire   +2 more sources

Temporal variability and local adaptation

Trends in Ecology & Evolution, 1996
Gene flow is often regarded as a constraining force because it can counteract selective forces that lead to local adaptationl. Local adaptation (adaptive deme formation) can be studied relatively easily in the context of host-parasite and plant-herbivore interactions through transplant experiment+4.
S, Gandon, Y, Michalakis, D, Ebert
openaire   +2 more sources

Temporal variability of soil organic carbon in paddies during 13‐year conservation tillage

Land Degradation and Development, 2019
Decreasing temporal variability of soil organic carbon (SOC) can avoid its temporary loss, which is positive to SOC accumulation and mitigation of climate change.
Jian-ying Qi, Xing Wang, Xin Zhao, Chao Pu, Zhengrong Kan, Chao Li, Peng-fei Liu, Xiao-ping Xiao, R. Lal, Hailin Zhang   +9 more
semanticscholar   +1 more source

Temporal Variability–Based Functional Brain Lateralization Study in ADHD

Journal of Attention Disorders, 2019
Objective: The aim of this work is to explore the relationship between temporal variability and brain lateralization in ADHD. Method: The temporal variabilities of 116 brain regions based on resting-state functional magnetic resonance imaging (rs-fMRI ...
Hongliang Zou, Jian Yang
semanticscholar   +1 more source

Towards temporal linguistic variables

10th IEEE International Conference on Fuzzy Systems. (Cat. No.01CH37297), 2002
Although fuzzy logic has been successfully applied in many different problem domains, fuzzy solutions typically structure the problem task as one of static categorisation. This may not be appropriate for dynamic systems, especially where higher-order information is unavailable.
J. Halliwell, null Qiang Shen
openaire   +1 more source

Spatio‐temporal variability of extreme precipitation in Nepal

International Journal of Climatology, 2018
Nepal is one of the most vulnerable countries to climate change impacts. Extreme weather events associated with heavy precipitations are the principal causes of landslides, debris flows and all types of floods disasters in the country, which by causing ...
R. Talchabhadel, Ramchandra Karki, B. R. Thapa, M. Maharjan, B. Parajuli   +4 more
semanticscholar   +1 more source

Normal temporal variability of the P100

Electroencephalography and Clinical Neurophysiology/Evoked Potentials Section, 1987
Determination of clinically significant temporal changes in P100 latency requires knowledge of the degree of normal intraindividual variability. Checkerboard visual evoked potentials using 3 check sizes (17', 35' and 70') were performed serially on 20 healthy volunteers. Each subject was tested at least twice an average of 6 months apart.
B S, Oken, K H, Chiappa, E, Gill
openaire   +2 more sources

A logic of temporal variables

Engineering Applications of Artificial Intelligence, 1995
Abstract Temporal variables can be used to verify and enforce temporal consistency which is usually essential for safe operation of physical processes and devices. A theory of non-continous intervals is used to represent temporal variables. This results in a set of five axioms which form the foundation for an intuitive, deductive temporal logic.
A.G. Stothert, I.M. Macleod
openaire   +1 more source

Temporal variability in population and community dynamics

Ecology, 2021
AbstractPopulations and communities fluctuate in their overall numbers through time, and the magnitude of fluctuations in individual species may scale to communities. However, the composite variability at the community scale is expected to be tempered by opposing fluctuations in individual populations, a phenomenon often called the portfolio effect ...
Tad A. Dallas, Andrew M. Kramer
openaire   +3 more sources

Increased temporal variability of striatum region facilitating the early antidepressant response in patients with major depressive disorder

Progress in Neuro-psychopharmacology and Biological Psychiatry, 2018
The aim of this study is to identify the difference of temporal variability among major depressive disorder (MDD) patients (with different early antidepressant responses) and healthy controls (HC), and further explore the relationship between pre ...
Z. Hou, Youyong Kong, Xiaofu He, Yingying Yin, Yuqun Zhang, Yonggui Yuan   +5 more
semanticscholar   +1 more source