geoscience /

22 Articles

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Life on another Planet? Water Vapour Found on Habitable-Zone Exoplanet for 1st Time

  admin    August 19, 2021    0

K2-18b also known as EPIC 201912552 b is a distant exoplanet around a small red dwarf star (K2-1) over 110 light-years […]

Shallow Marine Cretaceous Sequences and Petroleum Geology of the Onshore Portion Rio del Rey Basin, Cameroon, Gulf of Guinea

  admin    August 19, 2021    0

Olivier Anoh Njoh, Agbor Junior Taku Department of Geology, University of Buea, Buea, Cameroon Received 8 December 2015; accepted 19 […]

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Black Gold Chronicles 2: Advanced Artificial Lift Systems

  admin    August 18, 2021    0

The systematics of petroleum production from a borehole shows that the rate of fluid flow is directly proportional to the reservoir pressure. Hence, flow rate in low reservoir pressure boreholes needs to be enhanced by an artificial system.

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IMAGING THE UNDERWORLD: GROUND PENETRATING RADAR FOR SITE INVESTIGATIONS

  admin    August 18, 2021    0

Ground penetrating radar (GPR) is a high resolution, field-portable geophysical technique that produces graphic sections of subsurface ground structure. Typical site investigation applications include void detection, accurate location of buried obstructions and mapping subsurface soil and rock interfaces and defining buried archaeological structures.

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IDENTIFY THE RELATIONSHIP: PRINCIPAL COMPONENT ANALYSIS EXPLAINED

  admin    August 18, 2021    0

Principal Component Analysis (PCA) can be thought of as a method of dimension reduction. It is a set of variables analysed to reveal major dimensions of variation. Original data set in PCA can be replaced by a new and smaller data set with minimum loss of information. This reveals the relationship among these variables. (IBM SPSS)

Principal component analysis seeks the standard linear combination of the original variables which have proximal variance. It makes use of a few linear combinations which can be used to summarize the data; losing as little information as possible in the process.

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COUNTING THE GRAINS: PARTICLE SIZE CLASSIFICATION

  admin    August 18, 2021    0

The size of individual particles has an important influence on the behavior of soils. It is a general practice to classify the soils into four broad groups, namely; gravel, sand, silt size and clay size.
Classification based on particle size is of immense value in the case of coarse-grained soils rather than fine-grained soils because the behavior of such soils depends mainly on the particle size, whereas fine-grained soils depend on the plasticity characteristics. Some of the classification systems based on particle size alone are:

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MUDFLOW TERROR: LAHARS (VOLCANIC DEBRIS FLOWS)

  admin    August 18, 2021    0

Lahars are also known as volcanic mudflows. These are slopes that originate on the slopes of vocanoes and are a type of debris flow. A lahar mobilizes the loose accumulations of tephra( the airborne solids erupted from the volcano) and related debris.

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THE BRIDGE: GEOTECHNICAL-GEOPHYSICS

  admin    August 18, 2021    0

Geophysics is the application of physics principles to the study of the Earth.

The Earth is comprised of materials that have different physical properties. Clay and granite, for example, have different densities, acoustic velocities, elastic moduli, electrical conductivities, magnetic susceptibilities, and dielectric constants.