Results 131 to 140 of about 2,081,195 (334)
Sustainable Development, EarlyView.ABSTRACT Djibouti's economic evolution over the past two decades reveals a distinct dual structure: a steadily expanding service sector that anchors the economy and a volatile industrial sector driven by episodic, foreign‐financed infrastructure projects.
Sadik Aden Dirir
wiley +1 more source
Greenway development and gentrification
Southern Economic Journal, EarlyView.Abstract This paper presents research on expanding access to green spaces in developed areas. Critics claim greenway projects lead to gentrification by increasing the demand for housing and pushing out residents in nearby neighborhoods. We look for evidence of this phenomenon using a sorting model and panel data on aggregate populations in Atlanta ...
Jarron VanCeylon, Richard T. Melstrom
wiley +1 more source
Statistical inverse problems for non-Gaussian vector valued random fields with a set of experimental realizations [PDF]
, 2013 International audienceThe railway track irregularities, which is a four dimensions vector-valued random field, are the main source of excitation of the train.
Duhamel, Denis +3 more
core +2 more sources
A model of a discretely supported railway track based on a 2.5D finite element approach
Journal of Sound and Vibration, 2019 The dynamic properties of a railway track are important for both the generation of rolling noise and the development of rail corrugation. A conventional track consists of long rails mounted periodically on transverse sleepers and supported in ballast. In
Xianying Zhang +6 more
semanticscholar +1 more source
Multi‐level fatigue reliability assessment of reinforced concrete railway bridges
Structural Concrete, EarlyView.Abstract This paper presents a multi‐level reliability framework for assessing the fatigue life of reinforced concrete (RC) railway trough bridges subjected to cyclic loading. The framework incorporates increasing levels of analytical complexity and real‐world data in four steps. First, an analytical model applies S–N curves and the Palmgren–Miner rule
Silvia Sarmiento +7 more
wiley +1 more source
Experimental verification of railway substructure with application of reinforced geocomposite
Communications, 2004 In the paper the authors present results of experimental measurements realized in a testing stand which was built for evaluation of reinforced effect of geocomposite MACRIT GTV/50-50 B applied into a railway substructure.
Libor Izvolt, Martin Mecar
doaj +1 more source
Vsetin - Velke Karlovice Railway Track Refurbishment (section between km 2.725 - 6.000 km) Including Track Laying Technology [PDF]
, 2014 Práce se zabývá návrhem geometrických parametrů koleje a rekonstrukcí železničního svršku na vybraném úseku železniční tratě Vsetín – Velké Karlovice. Součástí rekonstrukce je také napojení trati v odbočce Bečva.
Klar, Vít
core
Journal of Sound and Vibration, 2019 The effect of large-scale variation in the support stiffness on railway track degradation is studied using a frequency-domain approach. The model used can deal with parametric excitation due to both the discrete sleeper spacing and arbitrary large-scale ...
Mehran Sadri, T. Lu, M. Steenbergen
semanticscholar +1 more source
Ungulate substrate use in fauna passages
Wildlife Biology, EarlyView.Fauna passages are increasingly constructed at major roads and railways to mitigate the negative effects of infrastructure and traffic on wildlife. The function of such passages depends on design, including the construction materials, soil, and vegetation.
Milla Niemi, Jan Olof Helldin
wiley +1 more source
Wildlife Biology, EarlyView.Exploration of new wildlife surveying methodologies that leverage advances in sensor technology and machine learning has led to tentative research into the application of seismology techniques. This, most commonly, involves the deployment of a footfall trap – a seismic sensor and data logger customised for wildlife footfall.
Benjamin J. Blackledge +4 more
wiley +1 more source