Results 61 to 70 of about 1,765,804 (200)

Assessing impacts of sulfur deposition on aquatic ecosystems: A decision support system for the Southern Appalachians

open access: yesEcosphere, 2023
With climate change and ongoing impacts from human development and resource extraction, US federal land management agencies are acutely concerned with managing for healthy aquatic ecosystems in the Southern Appalachian Mountain (SAM) Region.
Keith M. Reynolds   +8 more
doaj   +1 more source

The effect of network structure on phase transitions in queuing networks [PDF]

open access: yes, 2012
Recently, De Martino et al have presented a general framework for the study of transportation phenomena on complex networks. One of their most significant achievements was a deeper understanding of the phase transition from the uncongested to the ...
Attila Fekete   +7 more
core   +2 more sources

Sensitivity Analysis of Buckling Loads of Bisymmetric I-Section Columns with Bracing Elements / Analiza Wrazliwosci Siły Krytycznej Słupa Cienkosciennego Ze Stezeniami

open access: yesArchives of Civil Engineering, 2010
Wyznaczono pierwsza wariacje siły krytycznej wyboczenia słupa o przekroju bisymetrycznym otwartym przy wariacji sztywnosci i połozenia stezen. Przyjeto załozenia klasycznej teorii pretów cienkosciennych o nieodkształcalnym przekroju poprzecznym ...
Iwicki P.
doaj   +1 more source

Regulated dc-to-dc converter features low power drain [PDF]

open access: yes, 1968
A regulated dc-to-dc converter requires negligible standby power for the operation of critical electronic equipment. The main operating circuitry consumes power intermittently according to load conditions, rather than ...
Thornwall, J.
core   +1 more source

Torsional-flexural buckling of unevenly battened columns under eccentrical compressive loading [PDF]

open access: yes, 2016
In this paper, an analytical model is developed to determine the torsional-flexural buckling load of a channel column braced by unevenly distributed batten plates.
AISC (American Institute of Steel Construction)   +9 more
core   +1 more source

Discrete Fracture Model with Anisotropic Load Sharing

open access: yes, 2008
A two-dimensional fracture model where the interaction among elements is modeled by an anisotropic stress-transfer function is presented. The influence of anisotropy on the macroscopic properties of the samples is clarified, by interpolating between ...
Barthelemy M   +6 more
core   +1 more source

An Islanding Detection Scheme for Critical Load Management in a Solar PV Integrated Grid System [PDF]

open access: yesE3S Web of Conferences
Islanding is a condition that causes distributed generation to continuously feed power to critical loads when there is a grid failure. Critical loads that are separated from the main grid during faults are supported by a grid-connected PV array.
Murugan A.S.S.   +4 more
doaj   +1 more source

A parametric study on the buckling of functionally graded material plates with internal discontinuities using the partition of unity method

open access: yes, 2013
In this paper, the effect of local defects, viz., cracks and cutouts on the buckling behaviour of functionally graded material plates subjected to mechanical and thermal load is numerically studied.
Chakraborty, S   +3 more
core   +1 more source

A co-rotational beam element for geometrically nonlinear analysis of plane frames

open access: yesVietnam Journal of Mechanics, 2013
A co-rotational beam element for geometrically nonlinear analysis of plane frames is presented. On the base of the shallow arch expression for local strain, the element is formulated by using exact polynomials to interpolate the transversal displacement
Nguyen Dinh Kien   +2 more
doaj   +1 more source

Coupling Finite Element Analysis and the Theory of Critical Distances to Estimate Critical Loads in Al6060-T66 Tubular Beams Containing Notches

open access: yesMetals, 2020
This paper validates a methodology for the estimation of critical loads in tubular beams containing notch-type defects. The methodology is particularized for the case of Al6060-T66 tubular cantilever beams containing U-shaped notches.
Marcos Sánchez   +3 more
doaj   +1 more source

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