PubAg

Main content area

You searched for: Subject "temporal variation" Remove constraint Subject: "temporal variation"
Start Over

Search

22,519  Search Results

« Previous | 1 - 20 of 22,519 |
Number of results to display per page

Search Results

1. Basic Principles of Temporal Dynamics

Author:
Ryo, Masahiro; Aguilar-Trigueros, Carlos A.; Pinek, Liliana; Muller, Ludo A.H.; Rillig, Matthias C.
Source:
Trends in ecology & evolution 2019 v.34 no.8 pp. 723-733
ISSN:
0169-5347
Subject:
temporal variation,   etc   ; ecology; statistics;     Show all 3 Subjects
Abstract:
... All ecological disciplines consider temporal dynamics, although relevant concepts have been developed almost independently. We here introduce basic principles of temporal dynamics in ecology. We figured out essential features that describe temporal dynamics by finding similarities among about 60 ecological concepts and theories. We found that considering the hierarchically nested structure of comp ...
DOI:
10.1016/j.tree.2019.03.007

2. Correction to: Spatial and Temporal Variation in Brackish Wetland Seedbanks: Implications for Wetland Restoration Following Phragmites Control

Author:
Hazelton, Eric L. G.; Downard, Rebekah; Kettenring, Karin M.; McCormick, Melissa K.; Whigham, Dennis F.
Source:
Estuaries and coasts 2019 v.42 no.3 pp. 907
ISSN:
1559-2723
Subject:
temporal variation,   etc   ; Phragmites; wetlands;     Show all 3 Subjects
Abstract:
... The article Spatial and Temporal Variation in Brackish Wetland Seedbanks: Implications for Wetland Restoration Following Phragmites Control, written by Eric L. G. Hazelton, Rebekah Downard, Karin M. Kettenring, Melissa K. McCormick, and Dennis F. Whigham, was originally published electronically. ...
DOI:
10.1007/s12237-018-00500-2

3. Author Correction: Temporal Variation of White Rhino Dung Odours

Author:
Marneweck, Courtney; Jürgens, Andreas; Shrader, Adrian M.
Source:
Journal of chemical ecology 2019 v.45 no.4 pp. 423-427
ISSN:
0098-0331
Subject:
temporal variation,   etc   ; feces; odors;     Show all 3 Subjects
Abstract:
... The original version of this article unfortunately contained some mistakes. ...
DOI:
10.1007/s10886-019-01057-5

4. The current variation along the discharge channel in cloud-to-ground lightning

Author:
Zhang, Meng; Yuan, Ping; Liu, Guorong; Wang, Xuejuan; Cen, Jianyong; An, Tingting
Source:
Atmospheric research 2019 v.225 pp. 121-130
ISSN:
0169-8095
Subject:
temporal variation,   etc   ; electric current; lightning;     Show all 3 Subjects
Abstract:
... The spectra of cloud-to-ground lightning return strokes channels are obtained by a slit-less high-speed spectrograph. Based on the positive correlation between discharge current and the intensity of ionic lines in the spectra, variation characteristics of return stroke current along the discharge channel are investigated. The result shows that there are three types of the variation trend for disch ...
DOI:
10.1016/j.atmosres.2019.04.001

5. Dynamic N-mixture models with temporal variability in detection probability

Author:
Zhao, Qing; Royle, J. Andrew
Source:
Ecological modelling 2019 v.393 pp. 20-24
ISSN:
0304-3800
Subject:
temporal variation,   etc   ; models; probability; surveys;     Show all 4 Subjects
Abstract:
... In theory parameters of dynamic N-mixture models can be estimated with multiple years of data without the robust design under the assumption of constant detection probability. However, such an assumption can rarely be met in long-term studies, and the consequences of violating this assumption in the inferences of dynamic N-mixture models have not been assessed. In this study we used simulation stu ...
DOI:
10.1016/j.ecolmodel.2018.12.007

6. Correction to: Spatio-temporal trends in monthly pan evaporation in Aguascalientes, Mexico

Author:
Ruiz-Alvarez, Osias; Singh, Vijay P.; Enciso-Medina, Juan; Munster, Clyde; Kaiser, Ronald; Ontiveros-Capurata, Ronald Ernesto; Diaz-Garcia, Luis Antonio; Costa dos Santos, Carlos Antonio
Source:
Theoretical and applied climatology 2019 v.136 no.1-2 pp. 791-794
ISSN:
0177-798X
Subject:
temporal variation,   etc   ; evaporation; spatial variation; Mexico;     Show all 4 Subjects
Abstract:
... The original version of this article unfortunately contained a mistake. Tables 1 and 2 have errors. ...
DOI:
10.1007/s00704-018-2514-5

7. From single cells to tissue self‐organization

Author:
Xavier da Silveira dos Santos, Aline; Liberali, Prisca
Source:
TheFEBS journal 2019 v.286 no.8 pp. 1495-1513
ISSN:
1742-464X
Subject:
temporal variation,   etc   ; cell differentiation; homeostasis; tissues;     Show all 4 Subjects
Abstract:
... Self‐organization is a process by which interacting cells organize and arrange themselves in higher order structures and patterns. To achieve this, cells must have molecular mechanisms to sense their complex local environment and interpret it to respond accordingly. A combination of cell‐intrinsic and cell‐extrinsic cues are decoded by the single cells dictating their behaviour, their differentiat ...
DOI:
10.1111/febs.14694

8. Response to environmental, spatial, and temporal mechanisms of the phytoplankton metacommunity: comparing ecological approaches in subtropical reservoirs

Author:
Bortolini, Jascieli Carla; da Silva, Pedro Rogério Leandro; Baumgartner, Gilmar; Bueno, Norma Catarina
Source:
Hydrobiologia 2019 v.830 no.1 pp. 45-61
ISSN:
0018-8158
Subject:
temporal variation,   etc   ; biodiversity; environmental factors; models; phytoplankton;     Show all 5 Subjects
Abstract:
... Our objective was to evaluate the effect of environmental, spatial, and temporal predictors on different ecological approaches in phytoplankton metacommunity of two subtropical reservoirs. Our hypothesis was that the morphological structure, represented by morphological traits, would be related to both environmental and spatial factors, while the functional structure, represented by the physiologi ...
DOI:
10.1007/s10750-018-3849-8

9. Explaining the Transition from Diffusion Limited to Reaction Limited Surface Assembly of Molecular Species through Spatial Variations

Author:
Carroll, Keith M.; Knoll, Armin W.; Wolf, Heiko; Duerig, Urs
Source:
Langmuir 2018 v.34 no.1 pp. 73-80
ISSN:
1520-5827
Subject:
temporal variation,   etc   ; diffusivity; equations; models;     Show all 4 Subjects
Abstract:
... Surface assembly is often decomposed into two classes: diffusion and reaction limited processes. The transition between the two cases is complex because the dynamics are so different. In this article, we simulate, explain, and experimentally discuss the evolution of the spatial distribution for surface assemblies with diffusion limited and reaction limited processes. Explicitly, we demonstrate tha ...
DOI:
10.1021/acs.langmuir.7b03050
PubMed:
29237260
PubMed Central:
PMC5763283

10. Identifying key landscape pattern indices influencing the ecological security of inland river basin: The middle and lower reaches of Shule River Basin as an example

Author:
Ma, Libang; Bo, Jie; Li, Xiaoyang; Fang, Fang; Cheng, Wenjuan
Source:
The Science of the total environment 2019 v.674 pp. 424-438
ISSN:
0048-9697
Subject:
temporal variation,   etc   ; anthropogenic activities; ecosystems; landscapes; spatial variation; watersheds;     Show all 6 Subjects
Abstract:
... Landscape pattern evolution leads to changes of landscape spatial structure, which are intuitively reflected in the changes of ecosystem structure and composition and finally affect ecological security. In this paper, we assessed the spatiotemporal variation of the ecological security and landscape pattern of the middle and lower reaches of Shule River Basin in 1987–2015. Further, we analyzed the ...
DOI:
10.1016/j.scitotenv.2019.04.107

11. Downstream electric utility restructuring and upstream generation efficiency: Productivity dynamics of Indian coal and gas based electricity generators

Author:
Sugathan, Anish; Malghan, Deepak; Chandrashekar, S.; Sinha, Deepak K.
Source:
Energy 2019 v.178 pp. 832-852
ISSN:
0360-5442
Subject:
temporal variation,   etc   ; coal; data collection; electric generators; power generation; India;     Show all 6 Subjects
Abstract:
... This paper investigates the producer-level temporal dynamics of total factor productivity and operational performance changes in coal- and gas-based generators during the 2000–20013 period of major structural reforms in the downstream utilities in India. The total factor productivity is estimated using a recently developed improvement in the Stochastic Frontier panel method that controls for time- ...
DOI:
10.1016/j.energy.2019.04.107

12. Does food-drink pairings affect appetitive processing of food cues with different rewarding properties? Evidence from subjective, behavioral, and neural measures

Author:
Buodo, Giulia; Rumiati, Rino; Lotto, Lorella; Sarlo, Michela
Source:
Food quality and preference 2019 v.75 pp. 124-132
ISSN:
0950-3293
Subject:
temporal variation,   etc   ; appetite; desserts; dissociation; meat; neurophysiology; pizza; processing stages;     Show all 8 Subjects
Abstract:
... The present study aimed at investigating the impact of cultural conventions about food-drink pairings on subjective, behavioral, and neural responses to pictures of food with different rewarding properties (i.e., meat, pizza, and dessert). Viewing times, subjective ratings of appetite, valence and arousal, and event-related potentials (ERPs) were measured in response to food pictures in a passive ...
DOI:
10.1016/j.foodqual.2019.03.003

13. Delineating robust rectangular management zones based on column generation algorithm

Author:
Albornoz, Víctor M.; Ñanco, Linco J.; Sáez, José L.
Source:
Computers and electronics in agriculture 2019 v.161 pp. 194-201
ISSN:
0168-1699
Subject:
temporal variation,   etc   ; algorithms; computer software; models; precision agriculture; soil; vegetation;     Show all 7 Subjects
Abstract:
... This paper considers a management zone delineation problem in a precision agriculture framework that defines a partition of a field into rectangular and homogeneous management zones according to certain vegetation or soil indexes. Modeling the problem as a robust optimization model accounts for spatial and temporal variability of the index considered, representing this variability according to a f ...
DOI:
10.1016/j.compag.2019.01.045

14. Does urbanization always lead to rural hollowing? Assessing the spatio-temporal variations in this relationship at the county level in China 2000–2015

Author:
Zhang, Ruijuan; Jiang, Guanghui; Zhang, Qiang
Source:
Journal of cleaner production 2019 v.220 pp. 9-22
ISSN:
0959-6526
Subject:
temporal variation,   etc   ; autocorrelation; decision making; models; spatial variation; urbanization; China;     Show all 7 Subjects
Abstract:
... The assessment of the spatial and temporal variations in the relationship between rural hollowing and urbanization is necessary for policy-making related to coordinating urban-rural development in counties with different levels and modes of urbanization. Based on county-level data in China from 2000 to 2015, this paper measured the urbanization rates and the rural hollowing index of counties and i ...
DOI:
10.1016/j.jclepro.2019.02.148

15. Spatial and temporal characteristics and removal methodology of suspended particulate matter speckles from Geostationary Ocean Color Imager data

Author:
Lee, Min-Sun; Park, Kyung-Ae; Moon, Jeong-Eon; Kim, Wonkook; Park, Young-Je
Source:
International journal of remote sensing 2019 v.40 no.10 pp. 3808-3834
ISSN:
1366-5901
Subject:
temporal variation,   etc   ; color; particulates; reflectance; remote sensing; water vapor;     Show all 6 Subjects
Abstract:
... Reviewing six years of Geostationary Ocean Color Imager (GOCI) suspended particulate matter (SPM) concentration images from 2011 to 2016 revealed unexpected and some enormously high or low values. These speckles are randomly scattered throughout the entire study area or congregated at a certain part, which has strongly restricted the scientific applications of GOCI data thus far. They can be class ...
DOI:
10.1080/01431161.2018.1552818

16. The generalized ideal free distribution model: Merging current ideal free distribution models into a central framework

Author:
Menezes, Jorge F.S.; Kotler, Burt P.
Source:
Ecological modelling 2019 v.397 pp. 47-54
ISSN:
0304-3800
Subject:
temporal variation,   etc   ; empirical research; habitat preferences; models; prediction; researchers;     Show all 6 Subjects
Abstract:
... Density-dependent habitat selection is a central theme in ecology. Empirical studies collect data with increasing resolution and provide greater opportunities for its testing. However, several different density-dependent habitat selection models exist in the literature incorporating many different scenarios. We attempt to unify some of these models in a single framework, to increase our predictive ...
DOI:
10.1016/j.ecolmodel.2019.01.008

17. Impact of boundary excitation on stability of a diffusive boundary layer in porous media

Author:
Jafari Raad, Seyed Mostafa; Emami-Meybodi, Hamid; Hassanzadeh, Hassan
Source:
Advances in water resources 2019 v.126 pp. 40-54
ISSN:
0309-1708
Subject:
temporal variation,   etc   ; convection; mathematical models; mixing; porous media; water resources;     Show all 6 Subjects
Abstract:
... We study the effects of boundary excitation on the onset of natural convection and the dynamics of subsequent convective mixing by conducting linear stability analysis (LSA) and direct numerical simulations (DNS). A detailed parametric analysis on the stability of a diffusive boundary layer in porous media subject to three different types of linear decline, linear decline followed by constant conc ...
DOI:
10.1016/j.advwatres.2019.02.005

18. Persistent low avian malaria in a tropical species despite high community prevalence

Author:
Eastwood, Justin R.; Peacock, Lee; Hall, Michelle L.; Roast, Michael; Murphy, Stephen A.; Gonçalves da Silva, Anders; Peters, Anne
Source:
International journal for parasitology 2019 v.8 pp. 88-93
ISSN:
2213-2244
Subject:
temporal variation,   etc   ; avian malaria; birds; parasites; phylogeny; Australasian region;     Show all 6 Subjects
Abstract:
... Malarial and other haemosporidian parasites are widespread; however, their temporal dynamics are ill-understood. Longitudinal sampling of a threatened riparian bird revealed a consistently very low prevalence over 13 years (∼5%) despite infections persisting and prevalence increasing with age. In contrast, three key species within this tropical community were highly infected (∼20–75% prevalence) a ...
DOI:
10.1016/j.ijppaw.2019.01.001

19. On The Estimation of Temporal Changes of Snow Water Equivalent by Spaceborne Sar Interferometry: A New Application for the Sentinel-1 Mission

Author:
Conde, Vasco; Nico, Giovanni; Mateus, Pedro; Catalão, João; Kontu, Anna; Gritsevich, Maria
Source:
Vodohospodársky časopis 2019 v.67 no.1 pp. 93-100
ISSN:
0042-790X
Subject:
temporal variation,   etc   ; interferometry; lighting; models; snow; synthetic aperture radar; Finland;     Show all 7 Subjects
Abstract:
... In this work we present a methodology for the mapping of Snow Water Equivalent (SWE) temporal variations based on the Synthetic Aperture Radar (SAR) Interferometry technique and Sentinel-1 data. The shift in the interferometric phase caused by the refraction of the microwave signal penetrating the snow layer is isolated and exploited to generate maps of temporal variation of SWE from coherent SAR ...
DOI:
10.2478/johh-2018-0003

20. Consistent meal times improve performance on a daily time-place learning task

Author:
Wall, Kayla; Lewis, Leanna M.; Deibel, Scott H.; Hallett, Darcy; Skinner, Darlene M.; Thorpe, Christina M.
Source:
Behavioural processes 2019 v.160 pp. 26-32
ISSN:
0376-6357
Subject:
temporal variation,   etc   ; memory; operant conditioning; rats; spatial variation;     Show all 5 Subjects
Abstract:
... The ability of an animal to learn the spatiotemporal variability of stimuli is known as time-place learning (TPL). The present study investigated the role of the food-entrainable oscillator (FEO) in TPL. Rats were trained in an operant conditioning chamber which contained two levers that distributed a food reward, such that one lever provided food rewards in morning sessions, while the other lever ...
DOI:
10.1016/j.beproc.2019.01.002