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59 articles for “porosity”
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Research ArticleOpen accessIn the abstractPreparation of Porous Silicon P-Type and Thermal Diffusivity Measurement Using Photoacoustic TechniqueMohammed Jabbar Hussein, Suaad Sahib Hindal, Amany Akram AwaadPorous silicon (PSi) layers were formed on a p-type Si wafer. Electrochemical method was used to prepare 36 samples with three values of current density (10, 20 and 30) mA/cm2, each involved ( 20, 40, 60 and 80) min etching times the samples were heated to three selected temperatures of 100, 200 and 350°C in three groups. The first group … …International Journal of Structural Glass and Advanced Materials Research, Vol. 2, Issue 1 · 14 Nov 2018 · 7,437 accessesView PDFCite
Research ArticleOpen accessIn the abstractHeterogeneities and Intra Sand-Body Compartmentalization in Late Oligocene Delta-Front Deposit, Niger Delta, NigeriaRaphael Oaikhena Oyanyan, Michael Ndubuisi OtiThis paper presents the study of the heterogeneity in lithofacies, porosity, permeability, mineral grain density, pore-throats sizes and hydraulic rock types and the intra sand-body compartmentalization in cored delta-front deposit of Greater Ughelli depobelt of Niger Delta. Sedimentological study of core samples results in the identification of nine lithofacies and the interpretation of environments of deposition as mainly proximal and … …Current Research in Geoscience, Vol. 6, Issue 1 · 28 Mar 2016 · 8,090 accessesView PDFCite
Research ArticleOpen accessIn the abstractSedimentology and Depositional Environment of D2 Sand in Part of Greater Ughelli Depobelt, Onshore Niger Delta, NigeriaPrince Suka Momta, Jonathan O. Omoboh, Minapuye I. OdigiThe sedimentology and depositional environment of D2 sand in part of the Greater Ughelli depobelt have been studied using well logs and core data. Three wells were correlated to establish the lateral continuity of the D2 sand across the field and standard gamma ray log trends was used to infer depositional environments. Cored section of well B was described to … …American Journal of Engineering and Applied Sciences, Vol. 8, Issue 4 · 19 Sep 2015 · 8,585 accessesView PDFCite
Research ArticleOpen accessIn the abstractIdentification of Defects in Composite Materials Using an Improved Wavelet Analysis AlgorithmYahiaoui Aicha, Si-Chaib Med, O.A. ChellilProblem statement: The present work carries on the use of a method based on the wavelet transform to detect internal flaws of composite materials. The objective of this work consists in working out a data processing sequence of an ultrasonic signal identifying nearly flaws in composite laminate materials and estimating their position. Approach: The use of a numerical signal processing … …Physics International, Vol. 2, Issue 2 · 12 Mar 2012 · 8,163 accessesView PDFCite
Research ArticleOpen accessIn the abstractPores Reconfiguration in Compacted Bernam Series SoilZuraidah Yahya, Aminuddin Husin, Jamal Talib et al.Problem statement: The introduction of mechanization in oil palm (Elaeis guineensis) plantations resulted in soil compaction with increased bulk density and reduced porosity due to reconfiguration of soil pores. This could be a serious problem in the future as soil pores are important for aeration and water movement. Approach: This study was carried out to determine the effect of mechanization … …American Journal of Applied Sciences, Vol. 8, Issue 3 · 25 Mar 2011 · 8,681 accessesView PDFCite
Research ArticleOpen accessIn the abstractEffect of Converting Secondary Tropical Peat Swamp Forest into Oil Palm Plantation on Selected Peat Soil Physical PropertiesMohd Suffian Firdaus, Seca Gandaseca, Osumanu Haruna Ahmed, Nik Muhamad Ab. MajidProblem statement: The conversion of forest land into oil palm plantation is considered to be one of the causes of soil degradation and loss of tropical land forest in Southeast Asia. The objective of this study was to compare selected peat soil physical properties of secondary tropical peat swamp forest and oil palm plantation to determine the effect of forest … …American Journal of Environmental Sciences, Vol. 6, Issue 4 · 31 Aug 2010 · 8,742 accessesView PDFCite
Research ArticleOpen accessIn the abstractSoil-moisture Retention Characteristics of Earth Materials in the Weathering Profile over a Porphyritic Biotite GraniteJohn Kuna RajProblem statement: Three broad morphological zones and several sub-zones were differentiated within the weathering profile based on variations in earth materials and the degree of preservation of original bedrock minerals, textures and structures. Approach: The topmost Zone I (Grade 6) is some 12 m thick and comprises completely weathered bedrock materials (mainly a stiff, clayey sand) with indistinct relict bedrock … …Current Research in Geoscience, Vol. 1, Issue 1 · 30 Jun 2010 · 9,466 accessesView PDFCite
Research ArticleOpen accessIn the abstractMachinery Compaction Effects on Physical Properties of Bernam Series in an Oil Palm PlantationZuraidah Yahya, Aminuddin Husin, Jamal Talib et al.Problem statement: Introduction of mechanisation in oil palm (Elaeis guineensis) plantations could result in soil compaction and cause soil degradation. This could be a serious problem in the future due to increase in size, weight and transportation frequency of machines used. Objectives: This trial was carried out to evaluate the effect of different trailer weights and transportation frequencies on the … …American Journal of Applied Sciences, Vol. 6, Issue 12 · 31 Dec 2009 · 8,081 accessesView PDFCite
Research ArticleOpen accessIn the abstractIntegrations of Seismic Data, Petro-physical Evaluation and Reserve Estimation in Fimkassar Oil Field of Eastern Potwar, PakistanMuhammad Ishfaque, Hafeez Ur Rehman, Bilal Khalid et al.In upper Indus basin Potwar plateau is a successful exploration area for hydrocarbon. The study area is consisting of Fimkassar oil field and research data is obtained from Land Mark Resources with the special permission of Director General of Petroleum Concession Ministry of petroleum and natural resources Islamabad. The study area consists of well#1 and #2 and seismic lines 97-CP-07, … …American Journal of Engineering and Applied Sciences, Vol. 10, Issue 2 · 13 Apr 2017 · 8,092 accessesView PDFCite
Research ArticleOpen accessIn the abstractSubsidence Inferred from a Time Lapse Reservoir Study in a Niger Delta Field, NigeriaChukwuemeka Ngozi Ehirim, Tamunonengiyeofori DagogoProduction-induced subsidence due to compressibility and fluid property changes in a Niger delta field has been investigated using well log and 4D seismic data sets. The objective of the study is to evaluate changes in time lapse seismic attributes due to hydrocarbon production and infer to probable ground subsidence. Petrophysical modeling and analysis of well data revealed that Density (ρ), … …Current Research in Geoscience, Vol. 6, Issue 2 · 25 Oct 2016 · 8,216 accessesView PDFCite