Results 41 to 50 of about 3,575 (176)

Transient Vibration of Unsteady Linear Closed Loop Systems

open access: yesEngineering Transactions, 2015
A problem of unsteady linear closed loop system vibration is formulated and solved in this paper. Proportional, ideal derivative and delayed feedback interaction is considered.
E. Wittbrodt, K.J. Kaliński
doaj   +1 more source

Wildebeest movement responses to electric conservation fencing in the African Savannah ecosystem

open access: yesConservation Science and Practice, EarlyView.
These findings provide GPS‐based empirical evidence of how a newly constructed electric conservation fence alters migratory wildebeests, and show that effects are context‐dependent across habitat type, time of day, and distance to the boundary. While such fences can reduce human–wildlife conflict and support conservation goals, they must be carefully ...
Michael Honorati Kimaro   +5 more
wiley   +1 more source

Genetic, phenotypic, and ecological differentiation indicate a new cryptic and threatened species in the orchid genus Epidendrum from Alcatrazes Island, southeastern Brazil

open access: yesJournal of Systematics and Evolution, EarlyView.
Epidendrum insularis occurs on the remote Alcatrazes Island in the southeastern Brazilian coast. The description of this new cryptic species was only possible by the joint use of molecular markers, reproductive experiments, flower morphometry, functional traits, and community analysis.
Beatriz L. Arida   +12 more
wiley   +1 more source

Evaluation of earthquake-triggered landslides in el Salvador using a Gis based newmark model [PDF]

open access: yes, 2008
In this work, a model for evaluating earthquake-triggered landslides hazard following the Newmark methodology is developed in a Geographical Information System (GIS).
Havenith, Hans   +5 more
core  

Shallow Landslide Susceptibility Mapping in Sochi Ski-Jump Area Using GIS and Numerical Modelling

open access: yesISPRS International Journal of Geo-Information, 2019
The mountainous region of Greater Sochi, including the Olympic ski-jump complex area, located in the northern Caucasus, is always subjected to landslides.
Kai Kang   +4 more
doaj   +1 more source

Nonlinear Response‐History Analyses of Masonry and Mixed Structures With HybriDFEM

open access: yesEarthquake Engineering &Structural Dynamics, Volume 55, Issue 8, Page 1694-1709, 10 July 2026.
ABSTRACT The hybrid discrete‐finite element (HybriDFEM) method, previously developed to perform static and modal analysis in discrete and coupled discrete‐finite element models, is extended to nonlinear response‐history analyses. The equations of motion for the HybriDFEM model are solved through various numerical time‐integration schemes, both explicit
Igor Bouckaert   +2 more
wiley   +1 more source

Stochastic Newmark schemes for the discretization of hysteretic models [PDF]

open access: yes, 2010
The need to study and to obtain digital solutions of stochastic nonlineardifferential equations is a common situation in Seismic Engineering. This isthe case for the hysteretic models.
Pedro Vieira   +2 more
core  

An efficient numerical procedure for calculating periodic vibrations of elastic mechanisms

open access: yesVietnam Journal of Mechanics, 2016
This paper proposes a numerical procedure based on the well-known Newmark integration method to determine initial conditions for the periodic solution of a system of linear differential equations with time-periodic coefficients.
Nguyen Van Khang   +2 more
doaj   +1 more source

General Framework for Multi‐Degree‐of‐Freedom Stiffness Matrix Updating for Iterative Solution Algorithms in Hybrid Simulation

open access: yesEarthquake Engineering &Structural Dynamics, Volume 55, Issue 9, Page 1947-1967, 25 July 2026.
ABSTRACT Iterative solvers are advantageous for handling nonlinear structural analysis problems. The iterative solvers often require updating the stiffness matrix, which limits their application in static and pseudo‐dynamic hybrid simulations because: (1) updating the stiffness matrix of a system involving a physical specimen is challenging; (2 ...
Junyan Xiao, Oh‐Sung Kwon, Evan Bentz
wiley   +1 more source

The simulation of cable harness based on mass-spring model

open access: yesMATEC Web of Conferences, 2015
The simulation of cable harnesses is challenging due to the complex structure and the large deformation during the assembly operations. In this paper an improved mass-spring model is approached to simulate the shape of cable harnesses and to calculate ...
Yuan Bin   +3 more
doaj   +1 more source

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