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Browsing Earth Sciences Research Journal by Title
Now showing items 1-20 of 373
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A co-occurrence region based Bayesian network stepwise remote sensing image retrieval algorithm
Although scholars have conducted numerous researches on content-based image retrieval and obtained great achievements, they make little progress in studying remote sensing image retrieval. Both theoretical and application ...Universidad Nacional de Colombia Revistas electrónicas UN Earth Sciences Research Journal. -
A methodology for the analysis of the rayleigh-wave ellipticity
In this paper, a comprehensive explanation of the analysis (filtering and inversion) of the Rayleigh-wave ellipticity is performed, and the use of this analysis to determine the local crustal structure beneath the recording ...Universidad Nacional de Colombia Revistas electrónicas UN Earth Sciences Research Journal. -
A multivariate statistical approaches on physicochemical characteristics of ground water in and around nagapattinam district, cauvery deltaic region of tamil nadu, india
Ground water samples collected at different locations in and around the Nagapattinam district were analyzed for their physicochemical characteristics. The ground water samples were collected from fifty two dug and deep ...Universidad Nacional de Colombia Revistas electrónicas UN Earth Sciences Research Journal. -
A new approach on the tectonometamorphic mechanisms associated with p–t paths of the barrovian-type silgará formation at the central santander massif, colombian andes
Metamorphic pressure and temperature trajectories are generally used as tools to interpret the tectonic history ofdeformed belts of rocks that record past activity along active plate margins. The pre-Devonian metamorphic ...Universidad Nacional de Colombia Revistas electrónicas UN Earth Sciences Research Journal. -
A new empirical relation between surface wave magnitude and rupture length for turkey earthquakes
Many practical problems encountered in quantitative oriented disciplines entail finding the best approximate solution to an over determined system of linear equations. In this study, it is investigated the usage of different ...Universidad Nacional de Colombia Revistas electrónicas UN Earth Sciences Research Journal. -
A new interpretation for the garnet zoning in metapelitic rocks of the silgará formation, southwestern santander massif, colombia
A Barrovian sequence of the Silgará Formation at the southwestern Santander Massif, Colombian Andes, contains zoned garnets in which major and trace element zoning correlates with distribution of mineral inclusions, which ...Universidad Nacional de Colombia Revistas electrónicas UN Earth Sciences Research Journal. -
A Review Of Road‒Related Soil Erosion: An Assessment Of Causes, Evaluation Techniques And Available Control Measures
Road construction has increased significantly worldwide in the last decades to meet the demands of the increasing human population and this has led to serious soil erosion problems, the bulk of which is unaccounted for, ...Universidad Nacional de Colombia Revistas electrónicas UN Earth Sciences Research Journal. -
A semi-automatic approach to identify first arrival time: the Cross-Correlation Technique
The high-quality interpretation of seismic refraction data depends on the accurate and reliable identification of the first arrival times. First arrivals can be identified on a graphic or image by conventional picking, but ...Universidad Nacional de Colombia Revistas electrónicas UN Earth Sciences Research Journal. -
Accuracy Investigation of PPP Method Versus Relative Positioning Using Different Satellite Ephemerides Products Near/Under Forest Environment
In recent years, due to the increase in providers of orbit and clock corrections of satellites for data evaluation in real-time and post-processing the method of Precise Point Positioning (PPP) using measurements of Global ...Universidad Nacional de Colombia Revistas electrónicas UN Earth Sciences Research Journal. -
Accurate gravity anomaly interpolation: a case-study in cameroon, central africa
Many treatments in geodesy and geophysics require regularly gridded gravity anomalies. The gridding of gravity data needs interpolation. For the predicted data to be accurate, the smoothest type ofgravity anomaly should ...Universidad Nacional de Colombia Revistas electrónicas UN Earth Sciences Research Journal. -
Actividad de la falla la salina a partir de instrumentación sismológica
La falla La Salina se ubica en el departamento de Santander, en una región de alta sismicidad y es definida como de tipo inversa. En general, no presenta claras evidencias morfológicas ni de actividad reciente, por lo cual ...Universidad Nacional de Colombia Revistas electrónicas UN Earth Sciences Research Journal. -
Activity and vp/vs ratio of volcano-tectonic seismic swarm zones at nevado del ruiz volcano, colombia
An analysis of the seismic activity for volcano-tectonic earthquake (VT) swarms zones at Nevado del Ruiz Volcano (NRV) was carried out for the interval 1985- 2002, which is the most seismic active period at NRV until now ...Universidad Nacional de Colombia Revistas electrónicas UN Earth Sciences Research Journal. -
Adaptive seismic ground roll attenuation using the double density dual tree discrete wavelet transform (dwt) method
Seismologists working on the reflection of seismic data have been dealing with noise and trying to attenuate noise as much as possible without damaging a particular signal. Many methods have been used to removenoise types, ...Universidad Nacional de Colombia Revistas electrónicas UN Earth Sciences Research Journal. -
Adquisición, registro y transmisión en tiempo real de señales sismológicas bajo tcp/ip
Se presenta el desarrollo de un sistema de monitoreo de variables sísmicas, que incluye la adquisición y adecuación de 16 canales simultáneos, el preproceso, la grabación y la transmisión sobre redes IP en tiempo real. EI ...Universidad Nacional de Colombia Revistas electrónicas UN Earth Sciences Research Journal. -
Algunos algoritmos para filtros digitales en el procesamiento de información electromagnética
EI proceso de análisis de señales en prospección electromagnética, ha sido trabajado desde diferentes puntos de vista y varios autores han planteado diferentes metodologías. EI objeto de este artículo es plantear algunos ...Universidad Nacional de Colombia Revistas electrónicas UN Earth Sciences Research Journal. -
Altimetric and hypsometric analysis for soil and water conservation: A case study of Anjani and Jhiri river basin, Northern Maharashtra, India
The present paper contains longitudinal profile, hypsometric analysis of river basin and geomorphological studies for future planning of soil and water conservation in Anjani and Jhiri river basin, Jalgaon district, ...Universidad Nacional de Colombia Revistas electrónicas UN Earth Sciences Research Journal. -
El alumbramiento de una ciencia
Para hablar del nacimiento e historia de una ciencia hay necesidad de saber que hace y para qua sirve esa ciencia. Definir la geofísica y engendrar definiciones no es fácil y acudir al diccionario no siempre es sabio, ...Universidad Nacional de Colombia Revistas electrónicas UN Earth Sciences Research Journal. -
Amenaza sismica por método determinista en el triángulo de fallas valera-boconó-oca en el occidente de venezuela
EI desarrollo de múltiples proyectos de geología de fallas activas en Venezuela ha permitido que el país cuente hoy día con una base de datos completa y de gran calidad, usada como complemento a la información instrumental ...Universidad Nacional de Colombia Revistas electrónicas UN Earth Sciences Research Journal. -
An algorithm for generation of DEMs from contour lines considering geomorphic features
Geomorphic information is omitted from many existing methods of generating gridded digital elevation models (DEMs) from contour lines, resulting in significant errors during interpolation. Here, we present an advanced ...Universidad Nacional de Colombia Revistas electrónicas UN Earth Sciences Research Journal. -
An appraisal of the geologic structure beneath the ikogosi warm spring in south-western nigeria using integrated surface geophysical methods
An integrated surface geophysical investigation involving resistivity and magnetic methods was carried out in the immediate vicinity of the Ikogosi warm spring situated in south-western Nigeria with a view to delineating ...Universidad Nacional de Colombia Revistas electrónicas UN Earth Sciences Research Journal.
