Relevant bibliographies by topics / MASW

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  1. Journal articles
  2. Dissertations / Theses
  3. Books
  4. Book chapters
  5. Conference papers
  6. Reports

Academic literature on the topic 'MASW'

Author: Grafiati
Published: 4 June 2021
Last updated: 7 September 2023

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Journal articles on the topic "MASW"

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Khaheshi Banab, Kasgin, and Dariush Motazedian. "On the Efficiency of the Multi-Channel Analysis of Surface Wave Method for Shallow and Semi-Deep Loose Soil Layers." International Journal of Geophysics 2010 (2010): 1–13. http://dx.doi.org/10.1155/2010/403016.

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The multi-channel analysis of surface waves (MASWs) method was used to obtain the shear wave velocity variations through near surface (depth < 30 m) and semi-deep (30 m < depth < 100 m) soil layers in the city of Ottawa, Canada. Sixteen sites were examined to evaluate the capability of the active and passive MASW methods for cases where the shear wave velocity(Vs)contrast between very loose soil (Vs< 200 m/s) and very firm bedrock (Vs> 2,300 m/s) is very large. The MASW velocity results compared with those of other geophysical approaches, such as seismic reflection/refraction methods and borehole data, where available, mostly confirming the capability of the MASW method to distinguish the high shear wave velocity contrast in the study area. We have found that, of the inversion procedures of MASW data, the random search inversion technique provides better results than the analytical generalized inversion method.
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Miller, Rick, Jianghai Xia, Choon B. Park, and Julian M. Ivanov. "The history of MASW." Leading Edge 27, no. 4 (April 2008): 568. http://dx.doi.org/10.1190/tle27040568.1.

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Hutchinson, Peter J., and Maggie H. Beird. "3D mapping with MASW." Leading Edge 35, no. 4 (April 2016): 350–52. http://dx.doi.org/10.1190/tle35040350.1.

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Park, Choon. "MASW for geotechnical site investigation." Leading Edge 32, no. 6 (June 2013): 656–62. http://dx.doi.org/10.1190/tle32060656.1.

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İlkimen, Elif Meriç. "Soil Parameters of Creep Movement Şirinköy-Denizli Example." October 2022 3, no. 4 (December 15, 2022): 1–5. http://dx.doi.org/10.36937/cebel.2022.1767.

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This study, it is aimed to determine how soil parameters affect mass movement. The study area was carried out in the Şirinköy District of Merkezefendi District of Denizli. As a basis for the prevention of mass movements; Geophysical methods are of great importance in terms of determining and monitoring the properties of the sliding forces by determining the ground conditions in the region. For this reason, in this study, the characteristics of the mass movement were determined by determining the soil properties of the study area by using the seismic multi-channel surface wave (MASW) method, which is one of the geophysical methods. With the MASW method, it was determined that the seismic velocities of the area were lower than 910 m/s. The boundaries and units of the geological formations of the ground in the region have been determined. Limestone and fill surface slip surfaces in the area were observed in MASW sections. By evaluating all these studies together, the mass movement in the region was determined as slow flow (creep). Blocky limestone detected in the study area (it is the unit that relatively forms the slip surface. For this reason, developments such as groundwater, growth of roots of plants and trees, wetting, drying and freezing of the ground with the effect of precipitation may cause an acceleration of the movement speed should be followed.
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Ivanov, Julian, Richard D. Miller, Pierre Lacombe, Carole D. Johnson, and John W. Lane. "Delineating a shallow fault zone and dipping bedrock strata using multichannal analysis of surface waves with a land streamer." GEOPHYSICS 71, no. 5 (September 2006): A39—A42. http://dx.doi.org/10.1190/1.2227521.

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The multichannel analysis of surface waves (MASW) seismic method was used to delineate a fault zone and gently dipping sedimentary bedrock at a site overlain by several meters of regolith. Seismic data were collected rapidly and inexpensively using a towed 30-channel land streamer and a rubberband-accelerated weight-drop seismic source. Data processed using the MASW method imaged the subsurface to a depth of about [Formula: see text] and allowed detection of the overburden, gross bedding features, and fault zone. The fault zone was characterized by a lower shear-wave velocity [Formula: see text] than the competent bedrock, consistent with a large-scale fault, secondary fractures, and in-situ weathering. The MASW 2D [Formula: see text] section was further interpreted to identify dipping beds consistent with local geologic mapping. Mapping of shallow-fault zones and dipping sedimentary rock substantially extends the applications of the MASW method.
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Nguyen, Ngan Nhat Kim, Luu Van Do, Van Thanh Nguyen, Trinh Phuc Tran, and Khuong Manh Vo. "Maximizing the energy of surface wave and diminishing the effect of lateral inhomogenousness in the multichannel analysis of the surface wave (MASW)." Science and Technology Development Journal - Natural Sciences 2, no. 5 (July 2, 2019): 105–12. http://dx.doi.org/10.32508/stdjns.v2i5.785.

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Multichannel analysis of surface wave (MASW) is one of the novel seismic methods in geophysic field in Vietnam. MASW is able to survey the stiffness of the soil environment under the ground via the shear-wave velocity VS by analyzing the spectral image of surface wave. We did the 1D MASW survey upon the borehole belonged to the residential development project at district 2, Ho Chi Minh city with fixed receiver system, different source orientations and different source offsets. The spectral images of surface wave were combined to maximize the surface wave’s energy on the spectral image of surface wave to minimize the effect of lateral inhomogenousness and near - far source offsets. The data points were chosen on the phase curve on spectral image of surface wave for the inversion process to define shear wave velocity VS. The VS from MASW was compared to the petrographic components and another seismic method (downhole). The relative difference of the obtained VS values between two methods was less than 10%. The change of VS in MASW was absolutely compatible to petrographic components in geological borehole, near surface filled soil layer (93 m/s), dark-gray silty layer (68–157 m/s), sandy clay layer (250–265 m/s) and lower clay layer (254–400 m/s).
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Samui, Pijush, and T. Sitharam. "Correlation between SPT, CPT and MASW." International Journal of Geotechnical Engineering 4, no. 2 (April 2010): 279–88. http://dx.doi.org/10.3328/ijge.2010.04.02.279-288.

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Long, Michael, and Shane Donohue. "In situ shear wave velocity from multichannel analysis of surface waves (MASW) tests at eight Norwegian research sites." Canadian Geotechnical Journal 44, no. 5 (May 1, 2007): 533–44. http://dx.doi.org/10.1139/t07-013.

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The multichannel analysis of surface waves (MASW) technique, which is used to determine shear wave velocity (Vs) and hence small strain stiffness (Gmax), has recently generated considerable interest in the geophysics community. This is because of the ease of carrying out the test and analysis of the data. The objective of this work was to assess the repeatability, accuracy, and reliability of MASW surface wave measurements for use in engineering studies. Tests were carried out at eight well-characterized Norwegian clay, silt, and sand research sites where Vs had already been assessed using independent means. As well as being easy and quick to use, the MASW technique gave consistent and repeatable results, and the MASW Vs profiles for the clay sites were similar to those obtained from other techniques. Reasonable results were also obtained for the silt and sand sites, with the best result being obtained for the finer silt. This work also confirms that MASW Vs clay profiles are comparable to those obtained by correlation with cone penetration test (CPT) data. For these sites there also seems to be a good correlation between normalized small strain shear modulus and in situ void ratio or water content, and the data fit well with published correlations for clays.Key words: soft clays, silts, sands, small strain stiffness, shear wave velocity.
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Ivanov, Julian, Richard D. Miller, Daniel Feigenbaum, Sarah L. C. Morton, Shelby L. Peterie, and Joseph B. Dunbar. "Revisiting levees in southern Texas using Love-wave multichannel analysis of surface waves with the high-resolution linear Radon transform." Interpretation 5, no. 3 (August 31, 2017): T287—T298. http://dx.doi.org/10.1190/int-2016-0044.1.

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Shear-wave velocities were estimated at a levee site by inverting Love waves using the multichannel analysis of surface waves (MASW) method augmented with the high-resolution linear Radon transform (HRLRT). The selected site was one of five levee sites in southern Texas chosen for the evaluation of several seismic data-analysis techniques readily available in 2004. The methods included P- and S-wave refraction tomography, Rayleigh- and Love-wave surface-wave analysis using MASW, and P- and S-wave cross-levee tomography. The results from the 2004 analysis revealed that although the P-wave methods provided reasonable and stable results, the S-wave methods produced surprisingly inconsistent shear-wave velocity [Formula: see text] estimates and trends compared with previous studies and borehole investigations. In addition, the Rayleigh-wave MASW method was nearly useless within the levee due to the sparsity of high frequencies in fundamental-mode surface waves and complexities associated with inverting higher modes. This prevented any reliable [Formula: see text] estimates for the levee core. Recent advances in methodology, such as the HRLRT for obtaining higher resolution dispersion-curve images with the MASW method and the use of Love-wave inversion routines specific to Love waves as part of the MASW method, provided the motivation to extend the 2004 original study by using horizontal-component seismic data for characterizing the geologic properties of levees. Contributions from the above-mentioned techniques were instrumental in obtaining [Formula: see text] estimates from within these levees that were very comparable with the measured borehole samples. A Love-wave approach can be a viable alternative to Rayleigh-wave MASW surveys at sites where complications associated with material or levee geometries inhibit reliable [Formula: see text] results from Rayleigh waves.
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Dissertations / Theses on the topic "MASW"

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Ardito, Julio Cesar. "O uso do método de análise de ondas superficiais empregando fontes passivas e ativas." Universidade de São Paulo, 2013. http://www.teses.usp.br/teses/disponiveis/14/14132/tde-04062018-164457/.

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O método da análise multicanal de ondas superficiais foi empregado em um estudo de caso no sítio controlado do Instituto de Astronomia, Geofísica e Ciências Atmosféricas da Universidade de São Paulo - IAG-USP, localizado no campus Butantã, São Paulo, em terrenos da bacia sedimentar de São Paulo. O estudo visou à investigação geológica rasa, ou seja, ao mapeamento dos estratos sedimentares presentes e do contato sedimentos-embasamento. Além disso, procurou-se, através de testes de diversos parâmetros de aquisição, chegar-se a uma rotina para a aquisição e tratamento dos dados provenientes de fontes ativas (marreta e queda de peso) e passivas (tráfego de veículos) que possa ser indicada para ensaios em outras áreas da cidade de São Paulo que apresentem condições semelhantes às da área estudada. Na aquisição com fontes ativas foram registrados dados com diversos offsets mínimos e na passiva foi aplicada a técnica Passive Roadside com o arranjo de geofones disposto próximo e paralelamente à via de tráfego. Foram realizadas as etapas de pré-processamento dos dados, geração das imagens de dispersão, extração das curvas de dispersão e inversão. A combinação de imagens geradas a partir de dados adquiridos com diferentes fontes resultou numa imagem com melhor razão sinal-ruído, e consequentemente na produção de melhores curvas que foram invertidas para a geração dos perfis 1D das velocidades da onda S. De modo geral, os perfis de velocidades obtidos a partir dos dados obtidos com o emprego de uma marreta para geração da onda mapearam as interfaces geológicas mais superficiais, já os perfis resultantes dos dados adquiridos com o uso de uma fonte tipo queda de peso alcançaram profundidades maiores, por vezes amostrando o embasamento. No caso das fontes passivas, as principais interfaces de contato foram imageadas, conseguindo-se com sucesso o mapeamento do embasamento, que na área está a mais de 50 metros de profundidade. Correlações com o perfil litológico e de dados de ensaios SPT de um furo de sondagem localizado no centro do arranjo revelaram que as diferenças na determinação da profundidade das interfaces foram menores do que 10%. Desta forma, o método mostrou ser uma ferramenta prática e eficiente nas aplicações geotécnicas, principalmente em ix áreas urbanas onde o ruído é elevado, o que muitas vezes inviabiliza o uso da investigação sísmica convencional (refração ou reflexão).
The multichannel analysis of surface waves (MASW) method was employed in a case study on the controlled site in the Institute of Astronomy, Geophysics and Atmospheric Sciences (IAG), University of São Paulo (USP), located on the campus Butantã, São Paulo, in the grounds of the sedimentary basin São Paulo. The study aimed to shallow geological investigation, in other words, mapping of sedimentary strata present and the sediment-basement contact. In addition, It is sought to, by testing with different acquisition parameters, to get a routine for the acquisition and processing of data from active sources (sledgehammer and drop weight) and passive (vehicle traffic) that can be suitable for testing in other areas of the city of São Paulo who have similar conditions of the study area. In the acquisition with active sources were registered data with many different offsets and passive acquisition has been applied to the Passive Roadside MASW technique with the conventional linear receiver array disposed near and parallel to the traffic lane. Were performed, pre-processing of the data, generation of images of dispersion, extraction of dispersion curves and inversion. The combination of images generated based on data acquired from various sources resulted in image with improved signal to noise ratio and consequently in the production of finest curves that have been inverted to generate the 1D shear-wave velocities profiles. In general, the velocity profiles obtained from the data were acquired with the use of a sledgehammer to the wave generation mapped shallowest geological interfaces, but the resulting profiles of the acquired data using a font type \"drop weight\" reached greater depths, sometimes sampling the basement. In the case of passive sources, the main contact interfaces were imaged, achieving successful mapping of the basement, which in this area is over 50 meters deep. Correlations with the lithological profile and SPT data from a borehole located in the center of the array revealed that the differences in the depth determination of the interfaces was less than 10%. Thus, the method showed to be an efficient and practical tool in geotechnical applications, especially in urban areas where the noise is high, which often prevents the use of conventional seismic survey (reflection or refraction).
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Gibbens, Clem Alexander Molloy. "The Use of the Multi-channel Analysis of Surface Waves (MASW) Method as an Initial Estimator of Liquefaction Susceptibility in Greymouth, New Zealand." Thesis, University of Canterbury. Geological Sciences, 2014. http://hdl.handle.net/10092/10244.

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Combined analysis of the geomorphic evolution of Greymouth with Multi-channel Analysis of Surface Waves (MASW) provides new insight into the geotechnical implications of reclamation work. The MASW method utilises the frequency dependent velocity (dispersion) of planar Rayleigh waves created by a seismic source as a way of assessing the stiffness of the subsurface material. The surface wave is inverted to calculate a shear wave velocity (Park et al., 1999). Once corrected, these shear-wave (Vs) velocities can be used to obtain a factor of safety for liquefaction susceptibility based on a design earthquake. The primary study site was the township of Greymouth, on the West Coast of New Zealand’s South Island. Greymouth is built on geologically young (Holocene-age) deposits of beach and river sands and gravels, and estuarine and lagoonal silts (Dowrick et al., 2004). Greymouth is also in a tectonically active region, with the high seismic hazard imposed by the Alpine Fault and other nearby faults, along with the age and type of sediment, mean the probability of liquefaction occurring is high particularly for the low-lying areas around the estuary and coastline. Repeated mapping over 150 years shows that the geomorphology of the Greymouth Township has been heavily modified during that timeframe, with both anthropogenic and natural processes developing the land into its current form. Identification of changes in the landscape was based on historical maps for the area and interpreting them to be either anthropogenic or natural changes, such as reclamation work or removal of material through natural events. This study focuses on the effect that anthropogenic and natural geomorphic processes have on the stiffness of subsurface material and its liquefaction susceptibility for three different design earthquake events. Areas of natural ground and areas of reclaimed land, with differing ages, were investigated through the use of the MASW method, allowing an initial estimation of the relationship between landscape modification and liquefaction susceptibility. The susceptibility to liquefaction of these different materials is important to critical infrastructure, such as the St. John Ambulance Building and Greymouth Aerodrome, which must remain functional following an earthquake. Areas of early reclamation at the Greymouth Aerodrome site have factors of safety less than 1 and will liquefy in most plausible earthquake scenarios, although the majority of the runway has a high factor of safety and should resist liquefaction. The land west of the St. John’s building has slightly to moderately positive factors of safety. Other areas have factors of safety that reflect the different geology and reclamation history.
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Hicks, Malcolm Andrew. "Geotechnical Investigations of Wind Turbine Foundations Using Multichannel Analysis of Surface Waves (MASW)." Thesis, University of Canterbury. Geological Sciences, 2011. http://hdl.handle.net/10092/6519.

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The geophysical technique known as Multichannel Analysis of Surface Waves, or MASW (Park et al., 1999) is a relatively new seismic characterisation method which utilises Rayleigh waves propagation. With MASW, the frequency dependent, planar travelling Rayleigh waves are created by a seismic source and then measured by an array of geophone receivers. The recorded data is used to image characteristics of the subsurface. This thesis explains how MASW was used as a geotechnical investigation tool on windfarms in the lower North Island, New Zealand, to determine the stiffness of the subsurface at each wind turbine site. Shear‐wave velocity (VS) profiles at each site were determined through the processing of the MASW data, which were then used to determine physical properties of the underlying, weathered greywacke. The primary research site, the Te Rere Hau Windfarm in the Tararua Ranges of the North Island, is situated within the Esk Head Belt of Torlesse greywacke (Lee & Begg, 2002). Due to the high level of tectonic activity in the area, along with the high rates of weathering, the greywacke material onsite is highly fractured and weathering grades vary significantly, both vertically and laterally. MASW was performed to characterise the physical properties at each turbine site through the weathering profile. The final dataset included 1‐dimensional MASW shear‐wave evaluations from 100 turbine sites. In addition, Poisson’s ratio and density values were characterised through the weathering profile for the weathered greywacke. During the geotechnical foundation design at the Te Rere Hau Windfarm site, a method of converting shear wave velocity profiles was utilised. MASW surveying was used to determine VS profiles with depth, which were converted to elastic modulus profiles, with the input parameters of Poisson’s ratio and density. This study focuses on refining and improving the current method used for calculating elastic modulus values from shear‐wave velocities, primarily by improving the accuracy of the input parameters used in the calculation. Through the analysis of both geotechnical and geophysical data, the significant influence of overburden pressure, or depth, on the shear wave velocity was identified. Through each of the weathering grades, there was a non‐linear increase in shear wave velocity with depth. This highlights the need for overburden pressure conditions to be considered before assigning characteristic shear wave velocity values to different lithologies. Further to the dataset analysis of geotechnical and geophysical information, a multiple variant non‐linear regression analysis was performed on the three variables of shear wave velocity, depth and weathering grade. This produced a predictive equation for determining shear wave velocity within the Esk Head belt ‘greywacke’ when depth and weathering data are known. If the insitu geological conditions are not comparable to that of the windfarm sites in this study, a set of guidelines have been developed, detailing the most efficient and cost effective method of using MASW surveying to calculate the elastic modulus through the depth profile of an investigation site.
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Shahsavari, Vahid. "L'application de la méthode MASW pour déterminer l'épaisseur des couches superficielles du béton." Mémoire, Université de Sherbrooke, 2011. http://savoirs.usherbrooke.ca/handle/11143/1610.

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Nowadays, many environmental and climatic factors such as weathering actions, temperature variation, chemical attacks, abrasion and other degradation processes can cause near surface damage (0.0 m to 0.5 m) to most concrete structures exposed to severe environmental conditions. As such, the spread of such damage and, subsequently, the loss of mechanical properties of materials are very progressive in long term. The main purpose of Multichannel Analysis of Surface Waves (MASW) method is to 1) characterize near surface damage in concrete structures as a nondestructive testing procedure, 2) estimate the thickness of superficial layers and determine shear-wave velocity (V[subscript S]) profiles. The originality of this research is the application of MASW as a non-destructive method for the evaluation of near surface damage in concrete structures. Indeed, major applications of this method are concerning geotechnical applications. Experiments have been conducted on two concrete slabs (0.80 m, 3 m et 3.50 m) at IREQ with different typical simulated near surface pathologies in order to test the accuracy of MASW method. The results demonstrate that the MASW method has a potential to identify the homogeneity of concrete and estimate the thickness of superficial layers in concrete structures.
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Castelan, Jean-Sébastien. "Estimation des fréquences naturelles d'un site par la méthode des rapports spectraux influence de la topographie." Mémoire, Université de Sherbrooke, 2008. http://savoirs.usherbrooke.ca/handle/11143/1450.

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Localement, les mouvements du sol en surface peuvent être amplifiés durant un séisme. Les plus grands déplacements se situent à la fréquence naturelle du sol. Son estimation est donc nécessaire pour caractériser l'effet de site. L'analyse du bruit ambiant permet de déterminer directement la fréquence fondamentale hors activité sismique et sans nuisance pour l'environnement. Plusieurs campagnes de bruit ambiant ont été réalisées entre 2006 et 2007 par la commission géologique du Canada sur le territoire québécois. Les résultats obtenus ont permis de tester la validité de la méthode et d'en étudier les différents paramètres d'analyses. Une campagne d'enregistrement de bruit ambiant a été effectuée en juin 2007 dans le cadre d'une étude de stabilité de pente. Elle a permis de mettre en évidence le rôle important de la topographie dans l'estimation de la fréquence de résonance. Malgré une différence de hauteur du dépôt en amont et en aval de la pente, les fréquences naturelles sont identiques. Afin de confirmer l'influence de la topographie sur l'estimation locale de la fréquence de résonance, les résultats de deux méthodes d'investigation ont été comparés. La méthode MASW (Modal Analysis of Surface Waves), développée à l'université de Sherbrooke, permet de déterminer le profil des vitesses de cisaillement en surface et ainsi la fréquence propre. La méthode de Nakamura propose d'étudier le rapport spectral des composantes horizontales et verticales du bruit ambiant. Ce rapport spectral présente un pic à la fréquence fondamentale. Cette étude démontre que la méthode des rapports spectraux donne une estimation de la fréquence naturelle d'un sol qui prend en compte l'ensemble du relief. Les données obtenues à partir de la méthode MASW, ont permis d'effectuer des simulations numériques avec des vitesses de cisaillement du sol et des topographies différentes. Plusieurs modèles ont été réalisés pour trois vitesses de cisaillement, avec deux pentes différentes et avec une variation de topographie en surface et au niveau du roc. Les résultats obtenus indiquent que la topographie d'un site créée une bande de fréquence néfaste pour le dimensionnement parasismique. Cette bande est comparable au pic étalé en fréquence sur les rapports spectraux. Par ailleurs, les bornes de cette bande de fréquence sont les fréquences fondamentales théoriques des épaisseurs de dépôt extremum du site.
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Kump, Joseph Lee. "Efficient Algorithms for Data Analytics in Geophysical Imaging." Thesis, Virginia Tech, 2021. http://hdl.handle.net/10919/103864.

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Modern sensing systems such as distributed acoustic sensing (DAS) can produce massive quantities of geophysical data, often in remote locations. This presents significant challenges with regards to data storage and performing efficient analysis. To address this, we have designed and implemented efficient algorithms for two commonly utilized techniques in geophysical imaging: cross-correlations, and multichannel analysis of surface waves (MASW). Our cross-correlation algorithms operate directly in the wavelet domain on compressed data without requiring a reconstruction of the original signal, reducing memory costs and improving scalabiliy. Meanwhile, our MASW implementations make use of MPI parallelism and GPUs, and present a novel problem for the GPU.
Master of Science
Modern sensor designs make it easier to collect large quantities of seismic vibration data. While this data can provide valuable insight, it is difficult to effectively store and perform analysis on such a high data volume. We propose a few new, general-purpose algorithms that enable speedy use of two common methods in geophysical modeling and data analytics: crosscorrelation, which provides a measure of similarity between signals; and multichannel analysis of surface waves, which is a seismic imaging technique. Our algorithms take advantage of hardware and software typically available on modern computers, and the mathematical properties of these two methods.
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Lagarde, Julien. "Utilisation des ondes de surface pour l'inspection des parois de galeries." Thesis, Vandoeuvre-les-Nancy, INPL, 2007. http://www.theses.fr/2007INPL067N/document.

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La Multi-Channel Acquisition of Surface Waves (MASW) est devenu populaire depuis quelques années pour l'auscultation non destructive de milieux tabulaires naturels ou artificiels (Béton). Cette méthode, basée sur le comportement dispersif des ondes de surface, comporte deux étapes principales. Une courbe de dispersion des vitesses de phase des ondes de surface est, dans un premier temps, extraite d'un sismogramme par une transformée du champ d'onde (transformée p-?). L'inversion de cette dernière conduit enfin à une interprétation du milieu ausculté sous la forme d'un profil 1D des vitesses de propagation des ondes transverses en fonction de la profondeur. Cette dissertation propose une évaluation de la faisabilité de l’utilisation de la MASW pour le contrôle non destructif de structures souterraines. Cette étude s’est focalisée à évaluer puis à procéder aux différentes modifications nécessaires pour son utilisation en milieu présentant une surface concave (surface très répandue dans les structures de type galeries, tunnel ou puits)
Multi-Channel Acquisition of Surface Waves (MASW) has become very popular in recent years for non destructive testing of both layered natural and artificial (concrete) media. This method, based on the dispersive behaviour of surface waves, consists of two major steps. A phase velocity dispersion curve is first extract from the seismogram using a wave field transform (p-? transform). Then the inversion of this latter produces a 1D interpretation of the medium in terms of transverse wave velocities versus depth. While these two major steps of the method are well-documented for plane stratified media, it’s not the case when the investigated structure has a complex geometry. This dissertation deals with the evaluation of the feasibility to use MASW for non destructive evaluation of underground structures. After a brief survey of the problems that could be encountered with tunnel non destructive evaluation, this study focuses to determine and then proceed to the modifications needed to adapt the method for a concave geometry structure use
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Sfaxi, Houssem Eddine. "Application de la méthode MASW pour la détection de zones de faiblesse sous les chaussées." Mémoire, Université de Sherbrooke, 2002. http://savoirs.usherbrooke.ca/handle/11143/1198.

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Le but de ce document est d'appliquer une méthode entièrement développée à l'Université de Sherbrooke appelée Modal-Analysis-of-Surface-Waves (MASW) afin de détecter les zones de faiblesses sur les structures de chaussées telles que les cavités causées par infiltration de sol dans les vieux ponceaux par exemple. Cette méthode d'investigation sismique utilise l'enregistrement rapide des ondes de surface comme base de données. À partir d'essais in-situ non intrusifs, la méthode permet d'obtenir un profil des ondes de cisaillement en fonction de la profondeur. La première partie est consacrée à l'état des connaissances sur les ondes et les différentes méthodes géophysiques de caractérisation des pavages. Elle comprend la théorie de propagation des différentes ondes (compression, cisaillement et de surface); les modèles théoriques de calcul de la vitesse des ondes de cisaillement pour les sols granulaires et argileux; les différentes méthodes sismiques présentement utilisées sur les pavages en ingénierie. La deuxième partie explique de façon approfondie la méthode MASW: son historique, l'équipement nécessaire et le cheminement typique d'un essai. Elle présente aussi une nouvelle configuration pour la méthode MASW afin de mieux l'adapter à la reconnaissance des structures des chaussées. Il s'agit d'une excitation à côté du pavage au lieu du dessus. La troisième partie résume les résultats de différentes études numériques visant d'abord à minimiser au maximum l'effet de la couche de pavage sur le profil de vitesses des ondes de cisaillement des couches inférieures et ensuite à détecter et à localiser la présence de zones de faiblesse. Une correction de la courbe de dispersion a été envisagée permettant de réduire l'effet de la couche de pavage sur les couches sous-jacentes. Enfin, la quatrième partie présente les résultats obtenus pour deux sites ayant fait l'objet d'une reconnaissance avec la méthode MASW sur les structures de chaussée.
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Sfaxi, Houssem Eddine. "Application de la méthode MASW pour la détection de zones de faiblesse sous les chaussees." Sherbrooke : Université de Sherbrooke, 2002.

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Eikmeier, Claus Naves. "Análise Multicanal de Ondas de Superfície (MASW): um estudo comparativo com fontes ativas e passivas, ondas Rayleigh e Love e diferentes modos de propagação." Universidade de São Paulo, 2018. http://www.teses.usp.br/teses/disponiveis/14/14132/tde-09042018-164758/.

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Este trabalho teve como objetivo a realização de um estudo sobre o método MASW (Análise Multicanal de Ondas de Superfície) avaliando-se comparativamente resultados obtidos por diferentes fontes (ativas e passivas), ondas Rayleigh e Love e diferentes modos de propagação das ondas de superfície. Dois ensaios sísmicos foram executados: com geometria de aquisição bidimensional e geofones triaxiais de 10Hz, e com geometria linear e geofones de componente vertical de 4,5Hz. Foram realizados estudos com as fontes marreta, compactador de solo, ruído ambiental e com o tráfego de veículos, a última através da técnica Passive Roadside MASW. Resultados de inversões com dados da componente vertical (ondas Rayleigh) das ondas de superfície foram avaliados com os de inversões conjuntas com a componente radial (ondas Rayleigh) e transversal (ondas Love). Analisou-se também os produtos de inversões da curva de dispersão do modo fundamental com os de inversões conjuntas com o primeiro modo superior. Os estudos foram realizados em frente ao Instituto de Astronomia, Geofísica e Ciência Atmosféricas (IAG) localizado no interior do campus Cidade Universitária Armando de Salles Oliveira (CUASO) da Universidade de São Paulo (USP) no bairro do Butantã, São Paulo. A área de estudo possui informações de sondagem mista com descrição geológica do material e valores SPT (Standard Penetration Test) que foram utilizados para validação dos resultados. O compactador de solo demonstrou ser uma melhor fonte ativa em relação a marreta através de diferentes aspectos: geração de maior energia tanto na componente vertical quanto na transversal; espectros (V,f) de melhor qualidade; os dados apresentam a vantagem de poderem ser processados através da técnica f-k beamforming. A aquisição com o ruído ambiental não possibilitou a interpretação de curvas de dispersão devido ao pouco tempo de aquisição utilizado. Os dados obtidos pela técnica Passive Roadside MASW contribuíram com os dados de ativa através do registro de frequências mais baixas. Além disso, devido a clara identificação do 1° modo superior em seu espectro (V,f) foi possível a identificação do mesmo modo no espectro (V,f) dos dados de ativa, interpretação até então duvidosa. No entanto, a inversão conjunta das curvas de dispersão dos dados Passive Roadside com as dos dados de ativa não resultou em uma melhor inversão comparada com a inversão obtida apenas pelas curvas de ativa. A inversão conjunta de curvas das componentes radial (ondas Rayleigh) e transversal (ondas Love) com as curvas obtidas da componente vertical (ondas Rayleigh) também não trouxe um melhor resultado quando comparada com a inversão alcançada apenas com as curvas da componente vertical. A utilização do primeiro modo superior com o modo fundamental, no entanto, mostrou trazer melhoras significativas nos resultados das inversões em comparação com inversões apenas da curva do modo fundamental. Considerando as incertezas envolvidas os melhores resultados deste trabalho são convergentes com os dados de sondagem da área de estudo. No atual estágio de desenvolvimento do método MASW diversas etapas são bastante dependentes do operador. Neste sentido os estudos realizados neste trabalho contribuem para um melhor entendimento do método nos seus fundamentos, parâmetros de aquisição e processamento.
This work aim to study the MASW (Multichannel Analysis of Surface Waves) method by comparing results obtained with different sources (active and passive), Rayleigh and Love waves and different modes of surface waves propagation. Two seismic tests were performed: one with two-dimensional acquisition geometry and 10Hz triaxial geophones, and the other with linear geometry and 4.5 Hz vertical component geophones. Studies were carried out with the following sources: sledgehammer, rammer compactor, ambient noise and vehicular traffic, the last through the Passive Roadside MASW technique. Inversions results with vertical component data (Rayleigh waves) were evaluated through joint inversions with the radial (Rayleigh waves) and transversal (Love waves) components. It were also analyzed the inversions results of the fundamental mode of the dispersion curve with the results of joint inversions with the first higher mode. The studies were carried out in front of the Instituto de Astronomia, Geofísica e Ciência Atmosféricas (IAG) (Institute of Astronomy, Geophysics and Atmospheric Science) located inside the university campus Cidade Universitária Armando de Salles Oliveira (CUASO) of Universidade de São Paulo (USP) (University of São Paulo) in the neighborhood of Butantã, São Paulo. The study area has information with a geological material description and SPT (Standard Penetration Test) values that were used to validate the results. The rammer compactor showed to be a better active source in relation to sledgehammer through different aspects: generation of greater energy in vertical and transverse components; better quality of (V,f) spectrum; the data have the advantage that they can be processed using the f-k beamforming technique. The acquisition with ambient noise did not allow the dispersion curves interpretation due to the short acquisition time used. Passive Roadside MASW data contributed to the active data through the lower frequency. Besides that, due to the clear identification of the 1st higher mode in its (V,f) spectrum it was possible to identify the same mode in the (V,f) spectrum of the active data, interpretation that was, until then, doubtful. However, the joint inversion of the Passive Roadside dispersion curves with the active curves did not produce better results compared to the inversion obtained only by the active curves. The joint inversion of dispersion curves from radial (Rayleigh) and transversal (Love waves) components with the curves obtained by the vertical component (Rayleigh waves) also did not bring a better result when compared with the inversion achieved only by the vertical component curves. The use of the first higher mode with the fundamental mode, however, showed significant improvements in the joint inversions results compared to inversions only of the fundamental mode curve. Considering the uncertainties involved, the best results of this work converge with the a priori information of the study area. At the current MASW method stage of development, several steps are quite dependent on the operator. Therefore, the studies carried out in this work contribute to a better understanding of the method in its fundamentals, acquisition parameters and processing.
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Books on the topic "MASW"

1

Masu media-hō nyūmon: Mass media law. Tōkyō: Nihon Hyōronsha, 1994.

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Takeichi, Hideo. Zemināru Nihon no masu media: Mass media. 3rd ed. Tōkyō: Nihon Hyōronsha, 2016.

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Vaillancourt, Armand. Armand Vaillancourt: Sculpture de masse. = mass sculpture = escultura de masa. Rivière -du- Loup, Qué: Éditions Mus'Art, 2004.

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Milić, Vladimir. Tranzicija savremenog društva: Od masa u društvu do masovnog društva i svetskog društva masa : pretvaranje mase u publiku. Beograd: Savet projekta Konstituisanje Srbije kao pravne države, 1998.

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Milić, Vladimir. Tranzicija savremenog društva: Od masa u društvu do masovnog društva i svetskog društva masa : pretvaranje mase u publiku. Beograd: Savet projekta Konstituisanje Srbije kao pravne države, 1998.

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Nashonarizumu to masu media: Rentai to haijo no sōkoku = Nationalism, mass media. Tōkyō: Keisō Shobō, 2016.

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Shakespeare, William. Mass für Mass. Stuttgart: Philipp Reclam, 1985.

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Hanum, Zakiah. Masa berganti masa. Kuala Lumpur: Adhicipta (M), 1997.

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Mask for mask. Moorehead, MN: New Rivers Press, 2021.

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Media bunka o shakaigakusuru: Rekishi, jendā, nashonariti. Kyōto-shi: Sekai Shisōsha, 2009.

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Book chapters on the topic "MASW"

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Sireesha, Satya, V. Padmavathi, V. Sai Venkata Harini, and P. N. Rao. "MASW Survey for Mapping Soil Profiles at Investigation Site." In Lecture Notes in Civil Engineering, 249–56. Singapore: Springer Singapore, 2020. http://dx.doi.org/10.1007/978-981-15-3662-5_20.

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Ólafsdóttir, Elín Ásta, Bjarni Bessason, and Sigurður Erlingsson. "Application of MASW in the South Iceland Seismic Zone." In Proceedings of the International Conference on Earthquake Engineering and Structural Dynamics, 53–66. Cham: Springer International Publishing, 2018. http://dx.doi.org/10.1007/978-3-319-78187-7_5.

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Antipov, Vadim, and Vadim Ofrikhter. "Preliminary Express Assessment of Dispersive Soil Foundations Using MASW." In Lecture Notes in Civil Engineering, 55–63. Cham: Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-72404-7_6.

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Desai, Aniket, and Ravi S. Jakka. "Effect of A-priori Information on the Uncertainties in MASW Test." In Lecture Notes in Civil Engineering, 447–53. Singapore: Springer Singapore, 2021. http://dx.doi.org/10.1007/978-981-33-6564-3_38.

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Saha, Arindam, Kallol Saha, and Ashim Kanti Dey. "Seismic Site Classification and Site Period Determination of NIT Silchar Using MASW." In Lecture Notes in Civil Engineering, 507–22. Singapore: Springer Singapore, 2020. http://dx.doi.org/10.1007/978-981-15-6233-4_36.

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Parhi, Partha Sarathi, and Balunaini Umashankar. "MASW Survey to Map Soil Layers and Rock Profiles in a Construction Site." In Lecture Notes in Civil Engineering, 481–91. Singapore: Springer Singapore, 2020. http://dx.doi.org/10.1007/978-981-15-6086-6_39.

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Taipodia, Jumrik, and Arindam Dey. "Impact of Strike Energy on the Resolution of Dispersion Image in Active MASW Survey." In Proceedings of GeoShanghai 2018 International Conference: Multi-physics Processes in Soil Mechanics and Advances in Geotechnical Testing, 419–27. Singapore: Springer Singapore, 2018. http://dx.doi.org/10.1007/978-981-13-0095-0_47.

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Hamlyn, Joanna. "Case: mapping bedrock profiles for cable landings using seismic refraction and surface waves (MASW)." In Engineering Geophysics, 279–81. London: CRC Press, 2022. http://dx.doi.org/10.1201/9781003184676-45.

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Singh, Neeraj, Ashhad Imam, Sourav Bera, Keshav K. Sharma, Virendra Kumar, and A. K. L. Srivastava. "Review on the Applications of Multichannel Analysis of Surface Wave (MASW) in Indian Subcontinent." In Structural Integrity, 412–25. Cham: Springer International Publishing, 2022. http://dx.doi.org/10.1007/978-3-031-05509-6_34.

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Ezersky, Michael, and Anatoly Legchenko. "Mapping of Salt Consolidation and Permeability Using MASW Method in the Dead Sea Sinkhole Problem." In Engineering Geology for Society and Territory - Volume 5, 465–69. Cham: Springer International Publishing, 2014. http://dx.doi.org/10.1007/978-3-319-09048-1_89.

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Conference papers on the topic "MASW"

1

Park, Choon B., and Richard D. Miller. "Roadside Passive MASW." In Symposium on the Application of Geophysics to Engineering and Environmental Problems 2006. Environment and Engineering Geophysical Society, 2006. http://dx.doi.org/10.4133/1.2923570.

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Park, Choon B., and Mario Carnevale. "3‐D MASW." In Symposium on the Application of Geophysics to Engineering and Environmental Problems 2009. Environment and Engineering Geophysical Society, 2009. http://dx.doi.org/10.4133/1.3176680.

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B. Park, Choon, and Richard D. Miller. "ROADSIDE PASSIVE MASW." In 19th EEGS Symposium on the Application of Geophysics to Engineering and Environmental Problems. European Association of Geoscientists & Engineers, 2006. http://dx.doi.org/10.3997/2214-4609-pdb.181.115.

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Park, C., and M. Carnevale. "3-D MASW." In 22nd EEGS Symposium on the Application of Geophysics to Engineering and Environmental Problems. European Association of Geoscientists & Engineers, 2009. http://dx.doi.org/10.3997/2214-4609-pdb.157.sageep002.

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Cirone, Alessandro, Roger Rodrigues, and Choon Park. "MASW control of grouting." In SEG Technical Program Expanded Abstracts 2017. Society of Exploration Geophysicists, 2017. http://dx.doi.org/10.1190/segam2017-17740142.1.

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Carnevale, Mario, and Choon B. Park. "Wave‐Energy Source for MASW?" In Symposium on the Application of Geophysics to Engineering and Environmental Problems 2010. Environment and Engineering Geophysical Society, 2010. http://dx.doi.org/10.4133/1.3445477.

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Hutchinson, Peter J., Bryan J. Teschke, Katherine M. Zollinger, and Jeffrey M. Dereume. "Field Applicability of MASW Data." In Symposium on the Application of Geophysics to Engineering and Environmental Problems 2008. Environment and Engineering Geophysical Society, 2008. http://dx.doi.org/10.4133/1.2963232.

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Carnevale, Mario, and Choon B. Park. "Wave-Energy Source For MASW?" In 23rd EEGS Symposium on the Application of Geophysics to Engineering and Environmental Problems. European Association of Geoscientists & Engineers, 2010. http://dx.doi.org/10.3997/2214-4609-pdb.175.sageep060.

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J. Hutchinson, Peter, Bryan J. Teschke, Katherine M. Zollinger, and Jeffrey M. Dereume. "Field Applicability Of Masw Data." In 21st EEGS Symposium on the Application of Geophysics to Engineering and Environmental Problems. European Association of Geoscientists & Engineers, 2008. http://dx.doi.org/10.3997/2214-4609-pdb.177.39.

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В. Шакуро, С. "Комплексирование электроразведки ВЭЗ и сейсморазведки MASW." In 5th EAGE International Scientific and Practical Conference and Exhibition on Engineering and Mining Geophysics. European Association of Geoscientists & Engineers, 2009. http://dx.doi.org/10.3997/2214-4609.201403836.

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Reports on the topic "MASW"

1

Phillips, C., and S. Sol. Multichannel analysis of surface waves (MASW) technique for hazard studies. Natural Resources Canada/ESS/Scientific and Technical Publishing Services, 2012. http://dx.doi.org/10.4095/291759.

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Braudaway, D. W. Mass definition, mass measurement and recommendations. Office of Scientific and Technical Information (OSTI), September 1990. http://dx.doi.org/10.2172/6546492.

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Davis, R. S. Mass calibrations. Gaithersburg, MD: National Institute of Standards and Technology, 1989. http://dx.doi.org/10.6028/nist.sp.250-31.

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Adams, B. E. Mass Sensor. Office of Scientific and Technical Information (OSTI), January 2001. http://dx.doi.org/10.2172/773361.

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Roddick, J. C. Efficient mass calibration of magnetic sector mass spectrometers. Natural Resources Canada/ESS/Scientific and Technical Publishing Services, 1996. http://dx.doi.org/10.4095/207758.

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Vladymyrov, Volodymyr. THE PROBABLE PLACE FOR BEING CREATED MASS INFORMATION THEORY BETWEEN OTHER FUNDAMENTAL THEORIES ABOUT IMPACT ON MASS AUDIENCE. Ivan Franko National University of Lviv, February 2021. http://dx.doi.org/10.30970/vjo.2021.49.11059.

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The article continues, for the first time in English in domestic science, to study the question of the need to create a new scientific theory – the theory of mass information. For the first time too raises the question of creating, in a place of the current theory of mass communication, a system of sciences including: a) mass information (shpuld be created now in rpoh of mass information), b) the theory of mass understanding (has created as a hermeneutics of the masses), c) the theory of mass communication (has created as a theory of the transfer of content) and the theory of mass emotions (started to create in 2017). This is a paradoxical situation – the absence of fundamental theory of mass information in the epoch of mass information. Researches in the scientific works of foreign mass communication also showed the absence of a holistic theory, as well as attempts to create it, even the lack of decisions on the need to create it as a new scientific field.
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Kuligowski, Erica D., Erica D. Kuligowski, Richard D. Peacock, Jason D. Averill, and Richard W. Bukowski. Mass notification messages. Gaithersburg, MD: National Institute of Standards and Technology, 2009. http://dx.doi.org/10.6028/nist.sp.1093.

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Tolksdorf, Jurgen. Mass and Curvature. GIQ, 2012. http://dx.doi.org/10.7546/giq-4-2003-303-315.

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Riesig, Wayne J., and Sandra Fralick. Mass Storage Prototype. Fort Belvoir, VA: Defense Technical Information Center, December 1998. http://dx.doi.org/10.21236/ada359816.

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Smith, Timothy C., Lauren K. Hanyok, and Michael J. Hughes. Mask Waves Benchmark. Fort Belvoir, VA: Defense Technical Information Center, October 2007. http://dx.doi.org/10.21236/ada474307.

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