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Browsing Earth Sciences Research Journal by Title
Now showing items 71-90 of 373
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Compression ratio of municipal solid waste simulation using artificial neural network and adaptive neurofuzzy system
The compression ratio of Municipal Solid Waste (MSW) is an essential parameter for evaluation of waste settlement. Since it is relatively time-consuming to determine compression ratio from oedometer tests and there exist ...Universidad Nacional de Colombia Revistas electrónicas UN Earth Sciences Research Journal. -
Contenido
Tabla de contenido del presente númeroUniversidad Nacional de Colombia Revistas electrónicas UN Earth Sciences Research Journal. -
Contrasting styles of lead-zinc-barium mineralization in the Lower Benue Trough, Southeastern Nigeria
In the Lower Benue Trough of Southeastern Nigeria, lead-zinc-barium mineralization occurs as widely distributed epigenetic fracture-controlled vein deposits which are restricted to Albian – Turonian sediments. Detailed ...Universidad Nacional de Colombia Revistas electrónicas UN Earth Sciences Research Journal. -
Contribution of topographic and penetrometric measurements to a site characterization, case of the kekem landslide, national road n°5 (western cameroon)
Atopographical survey and a dynamic cone penetrometer testing (DCPT) were conducted over the Kekemlandslide area.The aim of the work was to unveil new topographic features of the site, and with the penetrometer soundings ...Universidad Nacional de Colombia Revistas electrónicas UN Earth Sciences Research Journal. -
Contribution to evaluation of technical seismicity effect on buildings - case study
The study of seismic loading on buildings and structures caused by technical seismicity has intensified due to increase in loads. Loads are of interest not only for existing structures but they must be checked as partof ...Universidad Nacional de Colombia Revistas electrónicas UN Earth Sciences Research Journal. -
Conversion of 3d seismic attributes to reservoir hydraulic flow units using a neural network approach: an example from the kangan and dalan carbonate reservoirs, the world's largest non-associated gas reservoirs, near the persian gulf
This study presents an intelligent model based on probabilistic neural networks (PNN) to produce a quantitative formulation between seismic attributes and hydraulic flow units (HFUs). Neural networks have been used for the ...Universidad Nacional de Colombia Revistas electrónicas UN Earth Sciences Research Journal. -
Corrigendum
Presentamos excusas a nuestros lectores y al antropólogo Javier Andrés Sandoval Andrade puesto que en el Vol 15 No 2 del 2011 de la revista Earth Science research Journal (ESRJ) se publicó el articulotitulado "Quaternary ...Universidad Nacional de Colombia Revistas electrónicas UN Earth Sciences Research Journal. -
Critical undrained shear strength of sand-silt mixtures under monotonic loading
This study uses experimental triaxial tests with monotonic loading to develop empirical relationships to estimate undrained critical shear strength. The effect of the fines content on undrained shear strength is analyzed ...Universidad Nacional de Colombia Revistas electrónicas UN Earth Sciences Research Journal. -
Cross-section generation of various geo-scientific features without contour digitization using a visual c++ based software application ‘vigat 2005’
Cross-section can be described as a two dimensional dataset where the horizontal distances are represented on the x-axis and the depth on the y-axis. A cross-section is a window into the subsurface.This work presents the ...Universidad Nacional de Colombia Revistas electrónicas UN Earth Sciences Research Journal. -
Crs seismic processing of a geological complex area
We applied the NMO and CRS (Common Reflector Surface) approaches to a complex geological area in order to compare their performances for obtaining enhanced images. Unlike NMO, CRS does not depend on a previous time velocity ...Universidad Nacional de Colombia Revistas electrónicas UN Earth Sciences Research Journal. -
Crustal thickness variations and seismicity of northwestern south america
Any uncompensated mass of the northern Andes Mountains is presumably under pressure to adjust within the Earth to its ideal state of isostatic equilibrium. Isostasy is the ideal state that anyuncompensated mass seeks to ...Universidad Nacional de Colombia Revistas electrónicas UN Earth Sciences Research Journal. -
Csem imaging of the near surface dynamics and its impact for foundation stability at quarter 27, 15th of may city, helwan, egypt
In the present work, we involve the Control Source Electromagnetic (CSEM) Technique to image the dynamic migration center of the near surface fractures, fissures, and cracks in a new dwelling area at 15th of May city close ...Universidad Nacional de Colombia Revistas electrónicas UN Earth Sciences Research Journal. -
Debris flow susceptibility mapping in a portion of the andes and preandes of san juan, argentina using frequency ratio and logistic regression models
In this study, the frequency ratio and logistic regression models are applied and verified for the analysis of debris flow susceptibility in a portion of the Dry Frontal Andes and Occidental Preandes of San Juan at ...Universidad Nacional de Colombia Revistas electrónicas UN Earth Sciences Research Journal. -
Deep crustal structure and estimation of moho in the lhasa terrane of central tibet
Seismic attributes analysis is applied to INDEPTH II seismic profiles to develop a better understanding of the deep crustal structure and geodynamics of the Lhasa Terrane in the central Tibet area. Analyses indicate that ...Universidad Nacional de Colombia Revistas electrónicas UN Earth Sciences Research Journal. -
Deep physical structure and geotectonic implications of the eastern margin of the Qinghai–Tibet Plateau
The eastern margin of the Qinghai–Tibet Plateau (QTP) is the focus of studies on eastward lateral extrusion of the latter’s crustal material. This study aims to explore the structural response of the QTP’s eastern crust–mantle ...Universidad Nacional de Colombia Revistas electrónicas UN Earth Sciences Research Journal. -
Denoising resistivity phosphate “disturbances” using haar mother wavelet transform (sidi chennane, morocco)
Wavelet transforms originated in geophysics in the early 1980s for the analysis of seismic signals. Since then, significant mathematical advances in wavelet theory have enabled a suite of applications in diverse fields. ...Universidad Nacional de Colombia Revistas electrónicas UN Earth Sciences Research Journal. -
Derivation of Soil Moisture using Modified Dubois Model with field assisted surface roughness on RISAT-1 data
The study discusses the soil moisture estimation using dual polarimetric RISAT-1. The semi-empirical approach of Modified Dubois Model (MDM) derived by (SrinivasaRao 2013) is worked out using (σ ̊HH) and (σ ̊HV) for soil ...Universidad Nacional de Colombia Revistas electrónicas UN Earth Sciences Research Journal. -
Detección en línea de onda-p en sismogramas 3-d utilizando redes neuronales
Se desarrolla un detector en línea del tiempo de arribo de ondas P sobre registros electrónicos de tres componentes de eventos tectónicos. Se lleva a cabo la detección en línea de la onda-p empleando redes neuronales (RN), ...Universidad Nacional de Colombia Revistas electrónicas UN Earth Sciences Research Journal. -
Detecting ionospheric precursors of a deep earthquake (378.8 km) on 7 july 2013, m w=7.2, in papua new guinea under a geomagnetic storm: two-dimensional principal component analysis
Two-dimensional ionospheric total electron content (TEC) data were collected during the time period from 00:00 on 2 July to 12:00 UT on 08 July 2013. This period spanned 5 days before to 1 day after a deep earthquake (378.8 ...Universidad Nacional de Colombia Revistas electrónicas UN Earth Sciences Research Journal. -
Detecting low frequency cycles in rainfall series from colombian coffee-growing area by using descriptive methods
Descriptive statistical methods were used for improving climatic variability scenarios regarding rainfall using time series from five representative pluviometric stations (Miguel Valencia, Naranjal, Cenicafé, La Bella and ...Universidad Nacional de Colombia Revistas electrónicas UN Earth Sciences Research Journal.
