Results 11 to 20 of about 1,232 (181)

Associations Between the Built Environment in GPS-Derived Activity Spaces and Sedentary Behavior, Light Physical Activity, and Moderate-to-Vigorous Physical Activity. [PDF]

Int J Environ Res Public Health
Built environment and physical activity (PA) studies have predominantly used fixed or home-centric approaches to identify environmental exposures. In this study, GPS-derived daily activity spaces were used to examine the relationships between the built ...
Vittor DG, Wilson JS, Crouter SE, Ethier BG, Shi L, Camhi SM, Troped PJ.   +6 more
europepmc   +2 more sources

On the theory and applications of stochastic gradient descent in continuous time [PDF]

, 2022
Stochastic optimisation problems are ubiquitous across machine learning, engineering, the natural sciences, economics, and operational research. One of the most popular and widely used methods for solving such problems is stochastic gradient descent.
Sharrock, Louis
core   +1 more source

Risk analysis and management in the water utility sector - a review of drivers, tools and techniques [PDF]

, 2004
The provision of wholesome, affordable and safe drinking water that has the trust of customers is the goal of the international water utility sector. Risk management, in terms of protecting the public health from pathogenic and chemical hazards has ...
MacGillivray, Brian H., Hrudey, S. E., Hamilton, Paul D., Hamilton, P. D., Strutt, J E, Pollard, S. J. T., Hrudey, Steve E., MacGillivray, B H, Strutt, J. E., Hamilton, P D, Pollard, S J T, MacGillivray, Brian, Hrudey, S E, Pollard, Simon J. T.   +13 more
core   +1 more source

Unveiling Chemical Cues of Insect-Tree and Insect-Insect Interactions for the Eucalyptus Weevil and Its Egg Parasitoid by Multidimensional Gas Chromatographic Methods

, 2022
Multidimensional gas chromatography is, presently, an established and powerful analytical tool, due to higher resolving power than the classical 1D chromatographic approaches.
Branco, Sofia, Schütz, Stefan; 4Department of Forest Zoology and Forest Conservation, Buesgen-Institute, Göttingen University, 37077 Göttingen, Germany; s.schuetz_137@gmx.de, Mateus, Eduardo P.; 3Center for Environmental and Sustainability Research (CENSE), Department of Environmental Sciences and Engineering, NOVA School of Science and Technology, NOVA University of Lisbon, 2829-516 Caparica, Portugal; mrp@fct.unl.pt (M.R.P.); epm@fct.unl.pt (E.P.M.), Gomes da Silva, Marco, Paiva, Maria Rosa; 3Center for Environmental and Sustainability Research (CENSE), Department of Environmental Sciences and Engineering, NOVA School of Science and Technology, NOVA University of Lisbon, 2829-516 Caparica, Portugal; mrp@fct.unl.pt (M.R.P.); epm@fct.unl.pt (E.P.M.), Branco, Sofia; 2The Forest Research Centre (CEF), School of Agriculture University of Lisbon (ISA), Tapada da Ajuda, 1349-017 Lisbon, Portugal, Mateus, Eduardo P., Mendes, Davide, Paiva, Maria Rosa, Gomes da Silva, Marco; 1Associated Laboratory for Green Chemistry (LAQV) of the Network of Chemistry and Technology (REQUIMTE), Chemistry Department, NOVA School of Science and Technology, NOVA University of Lisbon, 2829-516 Caparica, Portugal; dm.mendes@campus.fct.unl.pt, Schütz, Stefan, Mendes, Davide; 1Associated Laboratory for Green Chemistry (LAQV) of the Network of Chemistry and Technology (REQUIMTE), Chemistry Department, NOVA School of Science and Technology, NOVA University of Lisbon, 2829-516 Caparica, Portugal; dm.mendes@campus.fct.unl.pt   +11 more
core   +1 more source

Forecast of power generation and heat production from renewable energy sources

, 2017
The share of renewable energy sources (RES) in the end use of energy in the UE will increase from the present level of about 25% to 50 % in 2030 according to the assumptions of the European Commission. In Poland the RES Act was passed in 2015.
Mateusz Szydłowski, Janusz Sowiński, Tadeusz Pydych   +2 more
core   +2 more sources

Large-eddy simulation of orientation and rotation of ellipsoidal particles in isotropic turbulent fows

, 2015
The rotational motion and orientational distribution of ellipsoidal particles in turbulent flows are of significance in environmental and engineering applications.
Chen JC(陈进财), Jin GD(晋国栋), Zhang J(张健)   +2 more
core   +2 more sources

A stochastic differential equation SIS epidemic model

, 2011
In this paper we extend the classical susceptible-infected-susceptible epidemic model from a deterministic framework to a stochastic one and formulate it as a stochastic differential equation (SDE) for the number of infectious individuals $I(t)$. We then
Hu, L., X. Mao, Greenhalgh, David, D. Greenhalgh, Mao, Xuerong, Gray, Alison, Pan, Jiafeng, A. Gray, L. Hu, J. Pan   +9 more
core   +1 more source

Consensus Formation and Change are Enhanced by Neutrality

Advanced Science, EarlyView.
Neutral agents are shown to enhance both the formation and overturning of consensus in collective decision‐making. A general mathematical model and experiments with locusts and humans reveal that neutrality enables robust consensus via simple interactions and accelerates consensus change by reducing effective population size.
Andrei Sontag, Janina A. Hoffmann, Tim Rogers, Christian A. Yates   +3 more
wiley   +1 more source

Localizable Fluorescent Metal Ion Indicators With Tunable Colors

Advanced Science, EarlyView.
A modular platform enables the generation of fluorescent metal ion indicators with tunable emission colors and precise subcellular localization. Conjugation to self‐labeling proteins yields bright, color‐tunable potassium probes that permit wash‐free live‐cell imaging, revealing dynamic potassium efflux in stimulated neurons.
Ming‐Ming Wang, De‐en Sun, Klara Gries, Kai Johnsson   +3 more
wiley   +1 more source

Effect of environmental fluctuation in an eco-epidemiological model on the Salton Sea

, 2001
Elevated salinity, accelerated eutrophication, blooms of Avian botulism and dramatic water quality fluctuation are the key factors for massive die-offs of Tilapias and pelicans in the Salton Sea.
Bairagi, N., Sarkar, RamRup, Chattopadhayay, J., Chattopadhyay, J.   +3 more
core   +1 more source