scholarly journals High-Precision Magnetic Survey with UAV for the Archaeological Barrows at Novaya Kurya Monument in Western Siberia

2019 ◽  
Vol 17 (4) ◽  
pp. 5-12
Author(s):  
E. V. Balkov ◽  
P. G. Dyadkov ◽  
O. A. Pozdnyakova ◽  
D. A. Kuleshov ◽  
N. D. Evmenov ◽  
...  
Keyword(s):  
High Precision ◽  
Western Siberia ◽  
Statistical Processing ◽  
Archaeological Site ◽  
Magnetic Anomalies ◽  
Primary Data ◽  
Magnetic Survey ◽  
Geomagnetic Variations ◽  
Anomalous Field ◽  
Quantum Magnetometer

The paper presents the results of high-precision magnetic surveys by a quantum magnetometer using an unmanned aerial vehicle (UAV). The object of research was an area of 10 hectares (500 × 200 m) at the archaeological site of New Kurya in Western Siberia. The accuracy of the registration of the induction module of the geomagnetic field was not lower than 0.3 nT. The spatial accuracy of GPS coordinates lies in the submeter range. Magnetic anomalies caused by ancient mounds with an amplitude of up to 5–10 nT were revealed. The technique for isolating such low-amplitude anomalies included taking into account the geomagnetic variations of the external field, the regional anomalous field, and the use of a number of algorithms for the statistical processing of primary data. Identified magnetic anomalies can reliably determine the features of the device and the size of the mounds, including those not expressed in relief. The information received makes it possible to plan a strategy for archaeological study of this monument at a qualitatively different level. The prospects of further development and use of the technology in question for solving archaeological problems are noted.

A generalized multibody model for inversion of magnetic anomalies

Geophysics ◽  
1980 ◽  
Vol 45 (2) ◽  
pp. 255-270 ◽  
Author(s):  
B. K. Bhattacharyya
Keyword(s):  
Magnetic Field ◽  
Three Dimensional ◽  
Magnetization Vector ◽  
Critical Dimension ◽  
Magnetic Anomalies ◽  
Field Vector ◽  
Magnetic Survey ◽  
Multibody Model ◽  
Anomalous Field ◽  
Rectangular Block

The height of the observation surface above a magnetized region primarily determines the critical dimension of the smallest inhomogeneity in magnetization that can be resolved from magnetic survey data. When a rectangular block is smaller in size than this critical dimension, it appears homogeneously magnetized in the observed magnetic field. This consideration leads to the selection of a unit rectangular block of suitable dimensions with homogeneous magnetization. The magnetized region creating the anomalous field values in the area of observation can, therefore, be broken up into several blocks having different magnetizations, each block being equal in size and uniformly magnetized. The iterative method described here assumes initially that the anomalous field values are caused by a three‐dimensional (3-D) distribution of magnetized rectangular blocks. The optimum orientation of these blocks with respect to geographic north is then determined. This orientation is particularly insensitive to adjustments in the dimensions of the blocks. The top and bottom surfaces of each of the blocks in one or more layers are adjusted in a least‐squares sense to minimize the difference between observed and calculated field values. A method is also described for constraining the magnetization vector of each block to lie within a specified angle of the normal or reversed direction of the geomagnetic field vector. The procedure for analysis of data can also be extended to the case of anomalies over a draped surface. At the conclusion of the iterations, a 3-D distribution of magnetization is generated to delineate the magnetized region responsible for the observed anomalous magnetic field. Examples including model and aeromagnetic data are provided to demonstrate the usefulness of a generalized multibody model for inversion of magnetic anomalies.

scholarly journals The Experience of Detailing the Results of Magnetic Surveys of Archaeological Sites by Electrical Exploration Methods

2019 ◽  
Vol 17 (4) ◽  
pp. 13-22
Author(s):  
E. V. Balkov ◽  
O. A. Pozdnyakova ◽  
P. G. Dyadkov ◽  
Yu. G. Karin ◽  
I. O. Shaparenko ◽  
...  
Keyword(s):  
Survey Data ◽  
Western Siberia ◽  
Geophysical Methods ◽  
Archaeological Site ◽  
Archaeological Sites ◽  
Magnetic Survey ◽  
Maximum Information ◽  
Additional Information ◽  
Length Width ◽  
Archaeological Objects

Now, the work aimed at extracting maximum information about archaeological objects using geophysical methods is relevant. The possibilities for this give us the integration of various geophysical methods. In 2018–2019, electrical exploration works were carried out at the archaeological site Ust-Tartas mounds (Western Siberia). The sites for these works were selected based on magnetic survey data. The purpose of the research was to obtain additional information on the parameters of archaeological objects and to compare the possibilities of different geophysical methods. Several different magnetic anomalies were chosen for the studies. Methods of electromagnetic frequency sounding, electrotomography and georadiolocation were used. We were able to refine the length, width, depth of objects, and their configuration. The type of objects studied (burial or pit, settlement complex) is defined. The most informative results, which complement the magnetic survey data, are obtained using the electrotomography method.

The Results of High-Precision Magnetic Survey at An Archaeological Site, Janken (Kazakhstan)

2019 ◽  
Author(s):  
I.N. Modin ◽  
M.V. Kosnyreva ◽  
L.A. Zolotaya ◽  
A.Y. Palenov ◽  
T.V. Topilina
Keyword(s):  
High Precision ◽  
Archaeological Site ◽  
Magnetic Survey

High-Precision Magnetic Survey with UAV for the Archaeological Barrows at Novaya Kurya Monument in Western Siberia

2019 ◽  
Author(s):  
E. Balkov ◽  
D. Kuleshov ◽  
O. Pozdnyakova ◽  
P. Dyadkov ◽  
Z. Marchenko ◽  
...  
Keyword(s):  
High Precision ◽  
Western Siberia ◽  
Magnetic Survey

scholarly journals Compact Quantum Magnetometer System on an Agile Underwater Glider

Sensors ◽  
2021 ◽  
Vol 21 (4) ◽  
pp. 1092
Author(s):  
Brian R. Page ◽  
Reeve Lambert ◽  
Nina Mahmoudian ◽  
David H. Newby ◽  
Elizabeth L. Foley ◽  
...  
Keyword(s):  
Test Procedure ◽  
Reduction Process ◽  
Ground Truth ◽  
Sensor Technology ◽  
Magnetic Data ◽  
Magnetic Survey ◽  
Underwater Glider ◽  
Combined System ◽  
Extended Operation ◽  
Quantum Magnetometer

This paper presents results from the integration of a compact quantum magnetometer system and an agile underwater glider for magnetic survey. A highly maneuverable underwater glider, ROUGHIE, was customized to carry an increased payload and reduce the vehicle’s magnetic signature. A sensor suite composed of a vector and scalar magnetometer was mounted in an external boom at the rear of the vehicle. The combined system was deployed in a constrained pool environment to detect seeded magnetic targets and create a magnetic map of the test area. Presented is a systematic magnetic disturbance reduction process, test procedure for anomaly mapping, and results from constrained operation featuring underwater motion capture system for ground truth localization. Validation in the noisy and constrained pool environment creates a trajectory towards affordable littoral magnetic anomaly mapping infrastructure. Such a marine sensor technology will be capable of extended operation in challenging areas while providing high-resolution, timely magnetic data to operators for automated detection and classification of marine objects.

Ground magnetic survey for the investigation of magnetic minerals at Iboro Village, Abeokuta, south-western Nigeria

2021 ◽  
Vol 20 (2) ◽  
pp. 99-106
Author(s):  
O.I. Popoola ◽  
O.A. Adenuga ◽  
E.O. Joshua
Keyword(s):  
Magnetic Anomalies ◽  
Geological Structure ◽  
Magnetic Survey ◽  
Magnetic Minerals ◽  
Contour Maps ◽  
Ogun State ◽  
Geological Map ◽  
Regional Gradient ◽  
Ground Magnetic ◽  
Iron Ore Deposit

The geological map of the old western region of Nigeria indicates the presence of iron ore deposit at Iboro village Ogun state (7.9983o - 7.99933o N, 3.5790o - 3.5890o E). Hence a ground magnetic survey was carried out at a location at Iboro village so as to delineate the subsurface magnetic anomalies and to know whether the anomalies favour accumulation of magnetic minerals. The survey was carried out using high resolution proton precession magnetometer model G-856X. Eight traverses were run at 5m separations and earth magnetic intensity values were measured at 10m intervals along each traverse; the acquired data were corrected for drift. The residual anomalies obtained by removal of regional gradient from observed data using trend analysis were presented as profiles and maps. The treated data were qualitatively and quantitatively interpreted and the results gave values for the total ground magnetic anomalies that varied between a minimum and maximum peak values of about -33.0 and 30.6nT respectively. Depth to the basement rock was estimated using Peter’s half slope method which gave a maximum depth of about 13m. The contour maps and the total relative graphs present the subsurface picture of the geological structure that is assumed to harbour the metallic minerals through the action of the field towards the concentration of anomalies. It was suspected that the overburden was relatively thin in the study area and the minerals were at a shallow depth.

scholarly journals Parental control in children’s overweight and obesity prevention

2021 ◽  
Vol 100 (6) ◽  
pp. 629-632
Author(s):  
Liliia Sh. Nazarova ◽  
Rustem A. Daukaev ◽  
Dmitry E. Musabirov ◽  
Denis O. Karimov ◽  
Samat S. Baygildin ◽  
...  
Keyword(s):  
Parental Control ◽  
Statistical Processing ◽  
Overweight And Obesity ◽  
Primary Data ◽  
Child Feeding ◽  
Republic Of Bashkortostan ◽  
The Republic ◽  
Healthy Growth ◽  
Overweight Or Obesity ◽  
Obesity In Children

Introduction. Proper nutrition is one of the fundamental factors necessary for the healthy growth and development of children. The aim of this study was to examine the role of overt and covert parental control in the formation of excess body mass index (BMI) (overweight or obesity) in children. Materials and methods. The study included 135 residents of the Republic of Bashkortostan who had 7-11 year children with a z-score for BMI of at least -1 (optimal body weight, overweight, obesity). The collection of primary data was carried out in 2019 through a questionnaire. Statistical processing of the data was performed using logistic regression analysis, where the presence of excess BMI (overweight or obesity) in a child was considered as a dependent variable, and 25 questions characterizing the use of overt and covert parental control over nutrition were considered as covariates (Birch L.L. et al., 2001 (Child Feeding Questionnaire); Ogden J., Reynolds R., and Smith A., 2006). Results. According to the data obtained, the risk of exceeding BMI in children increased if parents offered them their favourite food in exchange for good behaviour (overt control - restriction-reward) (B=0.361, p=0.016), and decreased if parents refrained from buying sweets and chips for home (covert control) (B=-0.374, p=0.033). Conclusion. Parents' use of covert controls in the form of abstaining from buying sweets and chips at home, as well as refusal of such explicit controls as using a child's favorite food in exchange for good behavior, make a significant contribution to preventing the formation of overweight and obesity in children.

A Compendium to Ensure Computational Reproducibility in High-Dimensional Classification Tasks

2004 ◽  
Vol 3 (1) ◽  
pp. 1-24 ◽  
Author(s):  
Markus Ruschhaupt ◽  
Wolfgang Huber ◽  
Annemarie Poustka ◽  
Ulrich Mansmann
Keyword(s):  
Expression Profiles ◽  
Gene Expression Profiles ◽  
Statistical Processing ◽  
Primary Data ◽  
High Dimensional ◽  
Microarray Gene Expression ◽  
Data Set ◽  
Dimensional Classification ◽  
Biological Interpretation

We demonstrate a concept and implementation of a compendium for the classification of high-dimensional data from microarray gene expression profiles. A compendium is an interactive document that bundles primary data, statistical processing methods, figures, and derived data together with the textual documentation and conclusions. Interactivity allows the reader to modify and extend these components. We address the following questions: how much does the discriminatory power of a classifier depend on the choice of the algorithm that was used to identify it; what alternative classifiers could be used just as well; how robust is the result. The answers to these questions are essential prerequisites for validation and biological interpretation of the classifiers. We show how to use this approach by looking at these questions for a specific breast cancer microarray data set that first has been studied by Huang et al. (2003).

Analysis of the Czech magnetic anomaly data obtained by ground-based and airborne magnetic surveys

2020 ◽  
Author(s):  
Pavel Hejda ◽  
Dana Čápová ◽  
Eva Hudečková ◽  
Vladimír Kolejka
Keyword(s):  
Magnetic Anomaly ◽  
Magnetic Anomalies ◽  
Data File ◽  
Ore Deposits ◽  
Substantial Contribution ◽  
Magnetic Survey ◽  
Contour Maps ◽  
Anomaly Map ◽  
Ground Magnetic ◽  
Airborne Survey

<p>The modern epoch of ground magnetic surveying activity on the Czech territory was started by the Institute of Geophysics by setting up a fundamental network of the 1<sup>st</sup> order in 1957-58. It consists of 199 points and was reoccupied in 1976-78 and 1994-96. The anomaly maps were constructed by subtraction of the IGRF model.</p><p>Extensive aeromagnetic measurements have been performed from 1959 to 1972 by permalloy probe of Soviet provenience. The accuracy of the instrumentation was about (and often above) 10 nT. The second period of airborne survey started in 1976. Thanks to the deployment of proton precession magnetometer, the accuracy improved to ~ 2 nT. Since 2004 the measurements were carried out by caesium magnetometer. The data were digitized, known anthropogenic anomalies were cleared away and data were transformed to the regular grid with step 250 m. The final data file of magnetic anomalies ΔT, administered by the Czech Geological Survey, represents a substantial contribution to the exploration of ore deposits and to the structure geology in general.</p><p>In view of the fact that data file of magnetic anomalies was compiled from data acquired by heterogeneous methods in the course of more than 50 years, our recent study is aimed at looking into the homogeneity of the data by comparison them with ground-based magnetic survey. A simple comparison of the contour maps showed good similarity of the large regional anomalies. For more detailed analysis, the variation of ΔT in the neighbourhood of all points of the fundamental network was inspected and the basic statistic characteristics were computed. Summary results as well as several examples will be presented accordingly as the INSPIRE compliant services and eventually as the user-friendly web map application and made available on the CGS Portal http://mapy.geology.cz/ and on the updated web of the CzechGeo/EPOS consortium www.czechgeo.cz. Incorporating the map into the World Digital Magnetic Anomaly Map (WDMAM – IAGA) is also under consideration. This data will also be interesting for the EPOS.</p>

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