Subsoil Competence Evaluation of Proposed Sites for Underground Utilities Using Non-destructive Integrated Geophysical Surveys and Geotechnical Method

2016 ◽  
Vol 8 (2) ◽  
pp. 1-15
Author(s):  
O Falowo ◽  
O Bamidele ◽  
Y Akindureni ◽  
E Imeokparia
Keyword(s):  
Competence Evaluation ◽  
Geophysical Surveys ◽  
Underground Utilities ◽  
Non Destructive

REFLECTIVITY OF ELECTROMAGNETIC (EM) WAVE IN SHALLOW GROUND PENETRATING RADAR (GPR) SURVEY

2016 ◽  
Vol 78 (7-3) ◽  
Author(s):  
Nur Azwin Ismail ◽  
Nordiana Mohd Muztaza ◽  
Rosli Saad
Keyword(s):  
Dielectric Properties ◽  
Ground Penetrating Radar ◽  
Geophysical Method ◽  
Wave Reflections ◽  
Material Parameters ◽  
Geophysical Surveys ◽  
Underground Utilities ◽  
Dielectric Contrast ◽  
Different Depths ◽  
Ground Penetrating

Ground Penetrating Radar (GPR) is a geophysical method that is widely used in geophysical surveys, civil engineering applications, archaeological studies and locating underground utilities or hidden objects. It works by sending electromagnetic (EM) wave into the ground by transmitter and recording the returning signals by receiver. The returning signals bring information about the materials and changes in material parameters at different depths. The changes in dielectric properties () of two adjacent media result in EM wave reflections. In this study, several types of materials with different dielectric properties () are used in order to identify the reflectivity of the EM wave. Results prove that the larger the dielectric contrast, the higher the reflection coefficient thus the stronger the reflection.

scholarly journals Geophysical survey at late roman Mediana

Starinar ◽  
2011 ◽  
pp. 275-284
Author(s):  
Gordana Milosevic ◽  
Daniel Peters ◽  
Holger Wendling
Keyword(s):  
Geophysical Survey ◽  
Archaeological Remains ◽  
Geophysical Surveys ◽  
The University ◽  
The Town ◽  
Non Destructive ◽  
Destructive Methods ◽  
Late Roman

This article discusses the results of geophysical surveys conducted at Mediana, near the town Nis (Serbia) in April 2010. The research was realized in cooperation with the Romano-Germanic Commission of the German Archaeological Institute, the Archaeological Institute and the University of Belgrade. Mediana geomagnetic prospecting sites, as a form of non-destructive methods of investigation, provided many new details about the architectural and archaeological remains, particularly in the eastern part of the site.

scholarly journals Ground penetrating radar for buried utilities detection and mapping: a review

2021 ◽  
Vol 2107 (1) ◽  
pp. 012056
Author(s):  
Hasimah Ali ◽  
Nurul Syahirah Mohd Ideris ◽  
A F Ahmad Zaidi ◽  
M S Zanar Azalan ◽  
T S Tengku Amran ◽  
...  
Keyword(s):  
Machine Learning ◽  
Image Processing ◽  
Experimental Design ◽  
Data Collection ◽  
Ground Penetrating Radar ◽  
Machine Learning Techniques ◽  
Learning Techniques ◽  
Underground Utilities ◽  
Ground Penetrating ◽  
Non Destructive

Abstract This paper presents a review on Ground Penetrating Radar (GPR) detection and mapping of buried utilities which have been widely used as non-destructive investigation and efficiently in terms of usage. The reviews cover on experimental design in GPR data collection and survey, pre-processing, extracting hyperbolic feature using image processing and machine learning techniques. Some of the issues and challenges facing by the GPR interpretation particularly in extracting the hyperbolas pattern of underground utilities have also been highlighted.

Non-destructive technologies for the maintenance of underground utilities

2010 ◽  
Vol 97 (5) ◽  
pp. 33-39
Author(s):  
Michele Di Sivo ◽  
Daniela Ladiana
Keyword(s):  
Underground Utilities ◽  
Non Destructive

scholarly journals NON-DESTRUCTIVE GPR ANALYSIS OF THREATENED ANGKORIAN CERAMIC KILNS AT BANGKONG, SIEM REAP, CAMBODIA

2014 ◽  
Vol 34 ◽  
pp. 42 ◽  
Author(s):  
Till F Sonnemann ◽  
Rachna Chhay
Keyword(s):  
3D Visualization ◽  
Archaeological Site ◽  
Antenna System ◽  
The North ◽  
Siem Reap ◽  
Geophysical Surveys ◽  
Non Destructive ◽  
Sample Case

<p class="Abstract"><span lang="EN-GB">Pedestrian surveys have identified a large number of 9th century ceramic kilns to the north of the early Angkorian centre of Hariharalaya. Recent development in this area has put this archaeological site under threat. With a large number of kilns already destroyed before analysis, it was necessary to identify the sites for protection from further damage.</span></p><p class="Abstract">Since the defined areas showed little evidence on the surface, GPR surveys were conducted to find out what additional subsurface features could be used for classification. Using a 250MHz antenna system, the surveys were conducted over four kilns in varying state of preservation. The analysis included one definite and partly exposed kiln, and three potential kilns. Of the latter, one had been completely bulldozed, one partly destroyed and another one had remained undisturbed.</p> <p class="Abstract"><span lang="EN-GB">The geophysical surveys shows the possibilities to better define the extent of the kiln mound. 3D visualization of the data displays depth and extent of the fire box and ware chamber of this type of Khmer kiln, providing the opportunity to better outline the area to be protected. The survey serves as a successful sample case for the systematic non-destructive mapping of known and newly discovered kiln sites.</span></p>

scholarly journals Identification of the Grindulu Fault in Pacitan, East Java using Magnetic Method

2020 ◽  
Vol 10 (1) ◽  
pp. 22
Author(s):  
Latifatul Cholifah ◽  
Nurul Mufidah ◽  
Eden Lazuardi ◽  
Bagus Jaya Santosa ◽  
Sungkono Sungkono ◽  
...  
Keyword(s):  
Region Of Interest ◽  
Normal Fault ◽  
Magnetic Method ◽  
Magnetic Intensity ◽  
Fault Line ◽  
Geophysical Surveys ◽  
Filtering Technique ◽  
Local Anomalies ◽  
The City ◽  
Non Destructive

Magnetic method in geophysical surveys is common for its non-destructive use of sub-surface structure delineation. In this study, ground-based measurements of magnetic intensity were performed using a set of instruments in some regions of Pacitan, a city in the southern area of East Java province. Based on these measurements, data acquisition was used to identify the Grindulu faulting zone in the region of interest, potentially vulnerable to geohazards. The data were first corrected using the IGRF and diurnal corrections. A filtering technique of upward continuation at a height of 900 m was then applied to separate local anomalies from regional ones as the targeted sources in the present case. These separate anomalies and their corresponding reductions to the poles as further filtering processes were analyzed for predicting the location and direction of the fault. The results, extracted from data analysis and interpretation, show that the main path of the Grindulu is directed along the NE-SW fault line or N60oE. The resulting anomalies also reflect that the Grindulu is a normal fault with surrounding minor faults lying across the Grindulu, calling for increased awareness of vulnerability in the city to seismic threats.

scholarly journals Topographical research in the canabae of Brigetio in 2014

2015 ◽  
pp. 451-457
Author(s):  
Dávid Bartus ◽  
László Borhy ◽  
Zoltán Czajlik ◽  
Balázs Holl ◽  
Sándor Puszta ◽  
...  
Keyword(s):  
Present Article ◽  
Aerial Photography ◽  
Geophysical Surveys ◽  
Non Destructive ◽  
Destructive Methods

The present article introduces a recently started project which aims at studying the topography of the canabae and legionary fortress of Brigetio using non-destructive methods such as aerial photography and different geophysical surveys. After a brief summary of earlier research, the methods and results of the topographical work carried out in 2014 will be discussed below.

Luminescence from individual dislocations in II-VI and III-V semiconductors

1991 ◽  
Vol 49 ◽  
pp. 834-835
Author(s):  
J W Steeds
Keyword(s):  
Group Iv ◽  
Luminescence Properties ◽  
Carrier Recombination ◽  
Transmission Electron ◽  
Wide Range ◽  
Basic Physics ◽  
Semiconducting Compounds ◽  
Diamond Group ◽  
Non Destructive ◽  
Technological Significance

There is a wide range of experimental results related to dislocations in diamond, group IV, II-VI, III-V semiconducting compounds, but few of these come from isolated, well-characterized individual dislocations. We are here concerned with only those results obtained in a transmission electron microscope so that the dislocations responsible were individually imaged. The luminescence properties of the dislocations were studied by cathodoluminescence performed at low temperatures (~30K) achieved by liquid helium cooling. Both spectra and monochromatic cathodoluminescence images have been obtained, in some cases as a function of temperature.There are two aspects of this work. One is mainly of technological significance. By understanding the luminescence properties of dislocations in epitaxial structures, future non-destructive evaluation will be enhanced. The second aim is to arrive at a good detailed understanding of the basic physics associated with carrier recombination near dislocations as revealed by local luminescence properties.

Forensic Identifications Aided by Scanning Electron Microscopy of Silicone-Epoxy Microreplicas of Calcified and Cornified Structures

1975 ◽  
Vol 33 ◽  
pp. 678-679 ◽  
Author(s):  
R.F. Sognnaes
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Forensic Science ◽  
George Washington ◽  
Epithelial Surface ◽  
Extended Application ◽  
Tissue Surfaces ◽  
Non Destructive ◽  
Scanning Electron ◽  
Surface Changes

Sufficient experience has been gained during the past five years to suggest an extended application of microreplication and scanning electron microscopy to problems of forensic science. The author's research was originally initiated with a view to develop a non-destructive method for identification of materials that went into objects of art, notably ivory and ivories. This was followed by a very specific application to the identification and duplication of the kinds of materials from animal teeth and tusks which two centuries ago went into the fabrication of the ivory dentures of George Washington. Subsequently it became apparent that a similar method of microreplication and SEM examination offered promise for a whole series of problems pertinent to art, technology and science. Furthermore, what began primarily as an application to solid substances has turned out to be similarly applicable to soft tissue surfaces such as mucous membranes and skin, even in cases of acute, chronic and precancerous epithelial surface changes, and to post-mortem identification of specific structures pertinent to forensic science.

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