Results 21 to 30 of about 1,852,356 (316)

The impact of retirement on physical activity [PDF]

open access: yes, 2005
Most adults do not achieve the levels of physical activity currently recommended for a healthy lifestyle. Population surveys suggest that there is a linear decline of activity levels with age, yet physical activity has many health benefits for older ...
Der, G.   +3 more
core   +1 more source

Models of birdsong (physics)

open access: yesScholarpedia, 2009
Fil: Trevisan, Marcos Alberto. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Departamento de Fisica. Laboratorio de Sistemas Dinamicos; Argentina. Consejo Nacional de Investigaciones Cientificas y Tecnicas. Oficina de Coordinacion Administrativa Ciudad Universitaria. Instituto de Fisica de Buenos Aires.
Trevisan, Marcos Alberto   +1 more
openaire   +2 more sources

Physical System Modeling [PDF]

open access: yesJournal of Dynamic Systems, Measurement, and Control, 2010
603011
Stein, J. L.   +5 more
openaire   +2 more sources

Recent Design Optimization Methods for Energy-Efficient Electric Motors and Derived Requirements for a New Improved Method—Part 1

open access: yesProceedings, 2018
Energy-efficient electric motors are gathering an increased attention since they are used in electric cars or to reduce operational costs, for instance.
Johannes Schmelcher   +4 more
doaj   +1 more source

On physical web models

open access: yes2016 International Siberian Conference on Control and Communications (SIBCON), 2016
The Physical Web is a generic term describes interconnection of physical objects and web. The Physical Web lets present physical objects in a web. There are different ways to do that and we will discuss them in our paper. Usually, the web presentation for a physical object could be implemented with the help of mobile devices.
Manfred Sneps-Sneppe, Dmitry Namiot
openaire   +2 more sources

Structural explanations in Minkowski spacetime: which account of models? [PDF]

open access: yes, 2010
In this paper we argue that structural explanations are an effective way of explaining well known relativistic phenomena like length contraction and time dilation, and then try to understand how this can be possible by looking at the literature on ...
Felline, Laura   +4 more
core   +1 more source

Models in physics [PDF]

open access: yes, 2018
In its most common use, the term ‘model’ refers to a simplified and stylised version of the so-called target system, the part or aspect of the world that we are interested in. For instance, in order to determine the orbit of a planet moving around the sun we model the planet and the sun as perfect homogenous spheres that gravitationally interact with ...
openaire   +1 more source

The Effects of Scales on Modeling of Flow Patterns Over Spillway [PDF]

open access: yesمجلة جامعة النجاح للأبحاث العلوم الطبيعية
Climate changes leading to extreme events when the occurrence and intensity of severe phenomena have impeded the development and rehabilitation of hydraulic infrastructure, such as weirs and spillways according to these new conditions. The scale physical
Humam Khalid Ibrahim, Ammar Hatem Kamel
doaj   +1 more source

Accuracy of boundary layer treatments at different Reynolds scales

open access: yesOpen Engineering, 2020
Resistive forces associated to boundary layers (‘friction’) are usually out of scale in physical models of hydraulic structures, especially in the case of hydraulically smooth walls, generating distortions in the model results known as scale effects ...
Badano Nicolás D., Menéndez Angel N.
doaj   +1 more source

A data-driven model for Fennoscandian wildfire danger [PDF]

open access: yesNatural Hazards and Earth System Sciences, 2023
Wildfires are recurrent natural hazards that affect terrestrial ecosystems, the carbon cycle, climate and society. They are typically hard to predict, as their exact location and occurrence are driven by a variety of factors.
S. J. Bakke   +3 more
doaj   +1 more source

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