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    Wyświetlanie 1-13 z 13
    Tytuł:
    A Review on Impulse RADAR
    Autorzy:
    Kumar, Saket
    Kumar, Amit
    Singh, Vikrant
    Singh, Abhishek Kumar
    Powiązania:
    https://bibliotekanauki.pl/articles/2055207.pdf
    Data publikacji:
    2021
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    radar
    impulse radar
    ground penetrating radar
    GPR
    Opis:
    RADAR plays a vital role in military applications since its origin in the 2nd world war. Recently it has been used in surface inception, health monitoring, infrastructure health monitoring, etc. In these applications, Ultra-wideband RADAR systems are more popular than traditional RADAR systems. Impulse RADAR is a special kind of ultra-wideband RADAR, which is mostly used for surface penetration, through-wall imaging, antimissile detection, anti-stealth technology, etc. because of its high resolution and low center frequency. Out of all these applications, impulse RADAR has been used intensively as a ground-penetrating RADAR for the detection of land mines, underlying pipelines, buried objects, etc. This report has attempted to provide the steps for designing the impulse ground penetrating RADAR (GPR) as well as provides the value of crucial parameters required in the design process of commercial GPR systems.
    Źródło:
    International Journal of Electronics and Telecommunications; 2021, 67, 4; 579--587
    2300-1933
    Pojawia się w:
    International Journal of Electronics and Telecommunications
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Variability of temperature and thickness of permafrost active layer at coastal sites of Svalbard
    Autorzy:
    Budzik, Tomasz
    Dolnicki, Piotr
    Grabiec, Mariusz
    Puczko, Dariusz
    Gawor, Łukasz
    Klementowski, Jan
    Powiązania:
    https://bibliotekanauki.pl/articles/2051381.pdf
    Data publikacji:
    2013
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    Arctic
    Spitsbergen
    Nordaustlandet
    active layer
    ground penetrating radar
    permafrost
    Źródło:
    Polish Polar Research; 2013, 4; 353-374
    0138-0338
    2081-8262
    Pojawia się w:
    Polish Polar Research
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Results of geophysical scanning of a Roman senatorial villa in the Santa Marina Bay (Croatia, Istria) using the amplitude data comparison method (ADCM)
    Autorzy:
    Welc, Fabian
    Rousse, Corinne
    Bencic, Gaetano
    Powiązania:
    https://bibliotekanauki.pl/articles/2024852.pdf
    Data publikacji:
    2020
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    archaeology
    geophysics
    ground-penetrating radar
    magnetometry
    Roman period
    Croatia
    Opis:
    The article presents application of the new geophysical amplitude data comparison method (ADCM), resulting from integrated geophysical survey using ground-penetrating radar (GPR) and magnetometry. The ADCM was applied to recognize the horizontal and vertical stratigraphy of a Roman senatorial villa located in Santa Marina (western part of Croatian Istria). The measurements were carried out in 2017−2019 at this site, accompanied by a use of GPR and gradientometer. These two methods significantly differ from each other, but on the other hand, they are complementary to some extent. This is due to the fact that the methods register different types of underground materials. The GPR records electromagnetic waves reflected from real buried remains or boundaries between geological or archaeological layers that differ significantly in electrical properties. The magnetic method, in turn, records the anomalies of the magnetic field intensity resulting from the underground concentration of ferromagnetic minerals, hence it is ideal for searching structures filled with organic matter or burning material. However, a separate usage of these methods does not guarantee a full picture of archaeological structures that are preserved underground. Only the application of the ADCM allowed for a comparison of GPR and magnetic amplitude data reading, following which a spatial image (2D and 3D) of the preserved archaeological structures and the geological stratigraphy of the Santa Maria site were obtained.
    Źródło:
    Studia Quaternaria; 2020, 37; 79-90
    1641-5558
    2300-0384
    Pojawia się w:
    Studia Quaternaria
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Application of ground penetrating radar method combined with sedimentological analyses in studies of glaciogenic sediments in central Poland
    Autorzy:
    Lejzerowicz, Anna
    Wysocka, Anna
    Kowalczyk, Sebastian
    Powiązania:
    https://bibliotekanauki.pl/articles/2025229.pdf
    Data publikacji:
    2018
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    ground penetrating radar
    radar facies
    glaciogenic deposits
    sedimentological studies
    central Poland
    Opis:
    GPR method is perfectly suited for recognizing of sedimentary facies diversity in shallowly occurring sediments if there is a contrast of electrical properties between and/or within each layer. The article deals with the issue of the correlation between GPR surveys results and sedimentological analyses. As a result of this correlation a conceptual model of depositional systems of studied areas was developed. Studies were performed in two areas located in central Poland, where glacial deposits formed in the Middle Polish (Saalian) Glaciation are present. The study was based on 49 sediment samples and 21 GPR profiles. Analyses of lithofacies as well as granulometric and mineralogical composition of deposits of collected samples were carried out, showing the diversity of glacial deposits in both study sites. During GPR measurements shielded antenna with a frequency of 500 MHz was used which allowed high-resolution mapping of the internal structure of deposits and to identify four characteristic radar facies. Correlation of GPR profiles with point, one-dimensional sedimentological studies allowed the unambiguous interpretation of the GPR image and draw conclusions about the formation environment of individual units. Geophysical and sedimentological data obtained during study provide a new and detailed insight into selected glacial deposits in central Poland.
    Źródło:
    Studia Quaternaria; 2018, 35; 103-119
    1641-5558
    2300-0384
    Pojawia się w:
    Studia Quaternaria
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Reading of ground-penetrating radar (gpr) images of prehistoric flint mine; case study from Krzemionki Opatowskie archaeological site in central Poland
    Autorzy:
    Welc, Fabian
    Mieszkowski, Radosław
    Conyers, Lawrence B.
    Budziszewski, Janusz
    Jedynak, Artur
    Powiązania:
    https://bibliotekanauki.pl/articles/2027072.pdf
    Data publikacji:
    2016
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    ground-penetrating radar
    prehistoric flint mines
    Krzemionki Opatowskie
    Polska
    Polska
    Opis:
    Geo phys i cal sur veys con ducted in or der to map tun nels and ver ti cal shafts at the Neo lithic chert min ing field Krzemionki used a ground-pen e trat ing ra dar (GPR) to test hy poth e ses re gard ing ori en ta tion, depth and subsurface com - plex ity of these voids. Us ing two-di men sional re flec tion pro files the ver ti cal shafts, now mostly filled with lithic de - bris, were eas ily vis i ble. Am pli tude map ping vi su al ized de bris at shaft mar gins as well as a col lapsed ma te rial in side the voids. Some shal lower hor i zon tal tun nels were also vis i ble as sub-hor i zon tal pla nar re flec tions gen er ated from both ceil ing and floors of these void spaces. Ex ten sion of these in ter pre ta tions to un-mapped ar eas of the an cient min - ing dis trict and com plex ity of these pre his toric min ing fea tures could be ex am ined to de ter mine ex ca va tion in ten sity and ex ploi ta tion tech niques used dur ing the Neo lithic.
    Źródło:
    Studia Quaternaria; 2016, 33; 117-130
    1641-5558
    2300-0384
    Pojawia się w:
    Studia Quaternaria
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Ground penetrating radar sounding on an active rock glacier on James Ross Island, Antarctic Peninsula region
    Autorzy:
    Fukui, Kotaro
    Sone, Toshio
    Strelin, Jorge A.
    Torielli, Cesar A.
    Mori, Junko
    Powiązania:
    https://bibliotekanauki.pl/articles/2051857.pdf
    Data publikacji:
    2007
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    Antarctic Peninsula
    James Ross Island
    rock glacier
    ground penetrating radar
    Źródło:
    Polish Polar Research; 2007, 1; 13-22
    0138-0338
    2081-8262
    Pojawia się w:
    Polish Polar Research
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Remote sensing of a roman pottery workshop. Report on a geophysical survey carried out in Crikvenica (ancient Ad Turres, Croatia)
    Autorzy:
    Welc, Fabian
    Lipovac Vrkljan, Goranka
    Konestra, Ana
    Rosić, Tea
    Powiązania:
    https://bibliotekanauki.pl/articles/2026032.pdf
    Data publikacji:
    2017
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    remote sensing
    archaeology
    geophysics
    ground-penetrating radar
    gradiometer
    Crikvenica
    Croatia
    Opis:
    The paper presents results of a geophysical survey conducted in Crikvenica, a town located at the north-eastern Adriatic Sea coast in Croatia. The main aim was to identify extent of a Roman pottery workshop discovered to the north of the present town, at the site known as “Igralište”. The performed magnetic and GPR surveys within the area of the modern playground in Crikvenica revealed a large number of anomalies that may be connected with anthropogenic activity during different periods, both in modern and ancient times. The first group consists of anomalies generated by remnants of the modern underground infrastructure. Magnetic and ground-penetrating radar maps revealed anomalies in the north-western part of the modern playground that can be very likely interpreted as remains of a large ceramic kiln dated back to the Roman Period, similar to the kiln discovered during the excavations located further to the north. Finally, the survey performed within the Crikvenica football stadium clearly indicates that the integration of different Ground Penetrating Radar and magnetic methods allows for a detailed and effective identification of buried archaeological structures in large areas.
    Źródło:
    Studia Quaternaria; 2017, 34; 119-130
    1641-5558
    2300-0384
    Pojawia się w:
    Studia Quaternaria
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Internal structure of stone-banked lobes and terraces on Rink Plateau, James Ross Island, Antarctic Peninsula region
    Autorzy:
    Mori, Junko
    Fukui, Kotaro
    Sone, Toshio
    Strelin, Jorge A.
    Torielli, Cesar A.
    Powiązania:
    https://bibliotekanauki.pl/articles/2051858.pdf
    Data publikacji:
    2007
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    Antarctic Peninsula
    James Ross Island
    ground penetrating radar
    stone-banked lobe
    solifluction
    Źródło:
    Polish Polar Research; 2007, 1; 23-30
    0138-0338
    2081-8262
    Pojawia się w:
    Polish Polar Research
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Role of geophysical surveys in the identification of water escape zones from retention lakes: a case study on a selected object in Upper Silesia
    Autorzy:
    Mieszkowski, Radosław
    Wójcik, Emilia
    Kozłowski, Mikołaj
    Popielski, Paweł
    Powiązania:
    https://bibliotekanauki.pl/articles/2025248.pdf
    Data publikacji:
    2018
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    Ground penetrating radar (GPR) method
    electrical resistivity tomography (ERT) method
    retention lake
    water reservoir
    Opis:
    The main scientific goal of this work is the presentation of the role of selected geophysical methods (Ground-Penetrating Radar GPR and Electrical Resistivity Tomography ERT) to identify water escape zones from retention reservoirs. The paper proposes a methodology of geophysical investigations for the identification of water escape zones from a retention fresh water lake (low mineralised water). The study was performed in a lake reservoir in Upper Silesia. Since a number of years the administrators of the lake have observed a decreasing water level, a phenomenon that is not related to the exploitation of the object. The analysed retention lake has a maximal depth between 6 and 10 m, depending on the season. It is located on Triassic carbonate rocks of the Muschelkalk facies. Geophysical surveys included measurements on the water surface using ground penetration radar (GPR) and electrical resistivity tomography (ERT) methods. The measurements were performed from watercrafts made of non-metal materials. The prospection reached a depth of about 1 to 5 m below the reservoir bottom. Due to large difficulties of conducting investigations in the lake, a fragment with an area of about 5,300 m2, where service activities and sealing works were already commenced, was selected for the geophysical survey. The scope of this work was: (1) field geophysical research (Ground-Penetrating Radar GPR and Electrical Resistivity Tomography ERT with geodesic service), (2) processing of the obtained geophysical research results, (3) modelling of GPR and ERT anomalies on a fractured water reservoir bottom, and (4) interpretation of the obtained results based on the modelled geophysical anomalies. The geophysical surveys allowed for distinguishing a zone with anomalous physical parameters in the area of the analysed part of the retention lake. ERT surveys have shown that the water escape zone from the reservoir was characterised by significantly decreased electrical resistivities. Diffraction hyperboles and a zone of wave attenuation were observed on the GPR images in the lake bottom within the water escape zone indicating cracks in the bottom of the water reservoir. The proposed methodology of geophysical surveys seems effective in solving untypical issues such as measurements on the water surface.
    Źródło:
    Studia Quaternaria; 2018, 35; 121-129
    1641-5558
    2300-0384
    Pojawia się w:
    Studia Quaternaria
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Implementation of GPR and TLS data for the assessment of the bridge slab geometry and reinforcement
    Autorzy:
    Cafiso, S.
    Di Graziano, A.
    Goulias, D.
    Mangiameli, M.
    Mussumeci, G.
    Powiązania:
    https://bibliotekanauki.pl/articles/230272.pdf
    Data publikacji:
    2020
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    georadar
    skanowanie laserowe naziemne
    płyta mostowa
    geometria
    zbrojenie
    ground penetrating radar
    terrestrial laser scanning
    bridge slab
    geometry
    reinforcement
    Opis:
    This paper presents a suggested approach for forensic investigation of bridge decks in which Ground penetrating radar (GPR) consisting of two antennas is used to assess the current conditions. The methodology was tested on a bridge deck in central Sicily. The acquired data were analyzed for identifying the asphalt overlay thickness, concrete cover depth and deck thickness and location of the rebar reinforcement. In the proposed approach for assessing bridge deck conditions the GPR survey was complemented with (i) a site investigation on layer thicknesses for calibration/verification purposes of the GPR response and (ii) a Terrestrial Laser Scanning system (TLS) to verify the bridge design slab curvature. The study shows that this methodology has significant merits on accurately assessing such bridge deck components when bridge design records are non-existing, and by using non-invasive methods such as laser scanning and GPR. The great advantage provided by the TLS technique is the possibility to obtain a 3D output model of the scanned element with the accuracy of the best topographic instruments in order to complement GPR data surveys for bridge inspection.
    Źródło:
    Archives of Civil Engineering; 2020, 66, 1; 297-308
    1230-2945
    Pojawia się w:
    Archives of Civil Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    A Time Domain Model of GPR Antenna Radiation Pattern
    Autorzy:
    Edemsky, F.
    Popov, A.
    Zapunidi, S.
    Powiązania:
    https://bibliotekanauki.pl/articles/226318.pdf
    Data publikacji:
    2011
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    subsurface sensing
    ground penetrating radar
    electromagnetic pulse radiation
    ground-air interface
    time-domain Green function
    spatio-temporal radiation pattern
    inverse problem
    deconvolution
    Źródło:
    International Journal of Electronics and Telecommunications; 2011, 57, 3; 407-411
    2300-1933
    Pojawia się w:
    International Journal of Electronics and Telecommunications
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Ground Penetrating Radar’s (GPR) Imaging and Applications to Pavement Structural Assessment: a Case of Malaysia
    Autorzy:
    Muslim, N. H.
    Mohamed, M. I.
    Amin, Z. M.
    Shafaghat, A.
    Ismail, M.
    Keyyanfar, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/224097.pdf
    Data publikacji:
    2017
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    pavement
    assessment pavements
    geophysical tools
    ground penetrating radar
    GPR
    REFLEX 2D software
    nawierzchnia
    ocena nawierzchni
    narzędzia geofizyczne
    georadar
    oprogramowanie REFLEX 2D
    REFLEX 2D
    Opis:
    Traditionally, pavement distress evaluations were carried out by visual observation. Traditional practice requires a person to walk along the stretch of the pavement to conduct distress survey, take photo and measure defects occurred at deteriorated surfaces. However, this approach is too subjective, generates inconsistencies of information, less reliable and time-consuming. Due to these shortcomings, the transportation practitioners in pavement maintenance seek for other alternative tools and techniques to arrest incapability of traditional practices. One of the tools available in the market is Ground Penetrating Radar (GPR). GPR is a geophysical tool known by ability to accommodate extensive data in pavement assessment, geotechnical investigation and structural assessment. The application of GPR is such new to most of road maintenance industry in Malaysia. Therefore, this study has been undertaken to evaluate the benefits of using GPR imaging and its application in assessing pavement structures in Malaysia. The GPR survey was conducted in Meranti street located at UTM (Universiti Teknologi Malaysia) campus, and then analyzed using REFLEX 2D simulation software. The finding shows there are three (3) types of information obtained from GPR survey included; identification of raw image and processed image, identification of pavement segments thickness, and identification of GPR response towards surface and subsurface conditions, which illustrated in radargram images. Furthermore, the GPR can perform at high speed and can save time. It is also beneficial for long-term investment due to ability to provide extensive information at a greater depth. The research indicates that interpretation of GPR’s radargram images consumes time due to the low resolution. Therefore, selection of GPR system is subject to level of accuracy and clarity of radar images needed in a project.
    Źródło:
    Archives of Transport; 2017, 42, 2; 39-51
    0866-9546
    2300-8830
    Pojawia się w:
    Archives of Transport
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    GPR as a support tool in determining the causes of failure of objects built in the “white box” technology
    GPR jako narzędzie wspierające w określaniu przyczyn awarii obiektów zbudowanych w technologii "białej wanny"
    Autorzy:
    Lejzerowicz, A.
    Wutke, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/231334.pdf
    Data publikacji:
    2020
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    badanie nieinwazyjne
    metoda georadarowa
    GPR
    technologia białej wanny
    stała dielektryczna
    amplituda fali
    fala elektromagnetyczna
    non-destructive testing
    ground penetrating radar
    white box technology
    dielectric constant
    wave amplitude
    electromagnetic wave
    Opis:
    From the construction made in the “white box” technology, first of all tightness is required - on the structural elements there should not be any cracks or scratches, through which water could penetrate, which in consequence may lead to deformation of structural elements and even loosing of their load-bearing capacity. Among the methods enabling the location of weakened places in watertight concrete, the ground penetrating radar (GPR) method is effective because the local occurrence of water in the structure evokes a clear and unambiguous anomaly on the radargram. In addition, the GPR method allows you to indicate places where water flows without the necessity of excluding the object from use and interference in the construction layers. The designation of such locations will make it possible to undertake technical activities that can facilitate the takeover of water and thus ensure the desired load-bearing capacity and usability of the object. Using the GPR method, you can also designate places that have already been deformed – discontinuities or breaking. The article presents a case study of investigations that determine the causes of leakage of tunnels made in the “white box” technology in: twice within the bottom slab of the tunnel (1 GHz air-coupled and 400 MHz ground-coupled antenna) and once in the case of tunnel walls (1.6 GHz ground-coupled antenna).
    Od konstrukcji wykonanej w technologii "białej wanny" wymagana jest przede wszystkim szczelność - na elementach konstrukcyjnych nie powinno być żadnych pęknięć ani zadrapań, przez które woda może przenikać, ponieważ to w konsekwencji może prowadzić do deformacji elementów konstrukcyjnych, a nawet utraty ich nośności. Wśród metod umożliwiających lokalizację osłabionych miejsc w wodoszczelnym betonie, metoda georadarowa (ang. ground penetrating radar - GPR), jest skuteczna, ponieważ lokalne występowanie wody w strukturze wywołuje wyraźną i jednoznaczną anomalię na otrzymanym obrazie (radargramie). Ponadto metoda GPR pozwala wskazać miejsca, w których woda przepływa bez konieczności wyłączania obiektu z użytkowania i bez ingerowania w warstwy konstrukcyjne. Wyznaczenie takich miejsc umożliwia podjęcie działań technicznych, które mogą ułatwić przejęcie wody, a tym samym zapewnić pożądaną nośność i użyteczność obiektu. Za pomocą metody GPR można również wyznaczyć miejsca, które zostały już zdeformowane – miejsca nieciągłości lub ugięć czy spękań. Artykuł przedstawia studium przypadku oraz badania, które umożliwiły określenie przyczyny wycieku w obrębie tunelu wykonanego w technologii "białej wanny" - w obrębie płyty dennej tunelu (z wykorzystaniem anteny o częstotliwości 1 GHz sprzężonej z powietrzem oraz z wykorzystaniem anteny o częstotliwości 400 MHz sprzężonej z ziemią), jak również w przypadku ścian tunelu (antena o częstotliwości 1,6 GHz sprzężona z ziemią).
    Źródło:
    Archives of Civil Engineering; 2020, 66, 3; 173-189
    1230-2945
    Pojawia się w:
    Archives of Civil Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-13 z 13

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