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  • 1
    Online-Ressource
    Online-Ressource
    San Diego :Elsevier,
    Schlagwort(e): Electronic books.
    Materialart: Online-Ressource
    Seiten: 1 online resource (352 pages)
    Ausgabe: 1st ed.
    ISBN: 9780128118436
    Serie: Issn Series
    DDC: 551.0285
    Sprache: Englisch
    Anmerkung: Front Cover -- Advantages and Pitfalls of Pattern Recognition -- Advantages and Pitfalls of Pattern Recognition -- Copyright -- Contents -- Preface -- Acknowledgments -- I - From data to methods -- 1 - Patterns, objects, and features -- 1.1 Objects and patterns -- 1.2 Features -- 1.2.1 Types -- 1.2.2 Feature vectors -- 1.2.3 Feature extraction -- 1.2.3.1 Delineating segments -- 1.2.3.2 Delineating regions -- 1.2.4 Transformations -- 1.2.4.1 Karhunen-Loève transformation (Principal Component Analysis) -- 1.2.4.2 Independent Component Analysis -- 1.2.4.3 Fourier transform -- 1.2.4.4 Short-time Fourier transform and spectrograms -- 1.2.4.5 Discrete wavelet transforms -- 1.2.5 Standardization, normalization, and other preprocessing steps -- 1.2.5.1 Comments -- 1.2.5.2 Outlier removal -- 1.2.5.3 Missing data -- 1.2.6 Curse of dimensionality -- 1.2.7 Feature selection -- Appendix 1 Basic notions on statistics -- A1.1 Statistical parameters of an ensemble -- A1.2 Distinction of ensembles -- 2 - Supervised learning -- 2.1 Introduction -- 2.2 Discriminant analysis -- 2.2.1 Test ban treaty-some history -- 2.2.2 The MS-mb criterion for nuclear test identification -- 2.2.3 Linear Discriminant Analysis -- 2.3 The linear perceptron -- 2.4 Solving the XOR problem: classification using multilayer perceptrons (MLPs) -- 2.4.1 Nonlinear perceptrons -- 2.5 Support vector machines (SVMs) -- 2.5.1 Linear SVM -- 2.5.2 Nonlinear SVM, kernels -- 2.6 Hidden Markov Models (HMMs)/sequential data -- 2.6.1 Background-from patterns and classes to sequences and processes -- 2.6.2 The three problems of HMMs -- 2.6.3 Including prior knowledge/model dimensions and topology -- 2.6.4 Extension to conditional random fields -- 2.7 Bayesian networks -- Appendix 2 -- Appendix 2.1 Fisher's linear discriminant analysis -- Appendix 2.2 The perceptron -- Backpropagation. , Appendix 2.3 SVM optimization of the margins -- Appendix 2.4. Hidden Markov models -- Appendix 2.4.1. Evaluation -- Appendix 2.4.2. Decoding-the Viterbi algorithm -- Appendix 2.4.3. Training-the expectation-maximization /Baum-Welch algorithm -- 3 - Unsupervised learning -- 3.1 Introduction -- 3.1.1 Metrics of (dis)similarity -- 3.1.2 Clustering -- 3.1.2.1 Partitioning clustering -- 3.1.2.1.1 Fuzzy clustering -- 3.1.2.2 Hierarchical clustering -- 3.1.2.3 Density-based clustering -- 3.2 Self-Organizing Maps -- 3.2.1 Training of an SOM -- Appendix 3 -- Appendix 3.1. Analysis of variance (ANOVA) -- Appendix 3.2 Minimum distance property for the determinant criterion -- Appendix 3.3. SOM quality -- Topological error -- Designing the map -- II - Example applications -- 4 - Applications of supervised learning -- 4.1 Introduction -- 4.2 Classification of seismic waveforms recorded on volcanoes -- 4.2.1 Signal classification of explosion quakes at Stromboli -- 4.2.2 Cross-validation issues -- 4.3 Infrasound classification -- 4.3.1 Infrasound monitoring at Mt Etna-classification with SVM -- 4.4 SVM classification of rocks -- 4.5 Inversion with MLP -- 4.5.1 Identification of parameters governing seismic waveforms -- 4.5.2 Integrated inversion of geophysical data -- 4.6 MLP in regression and interpolation -- 4.7 Regression with SVM -- 4.7.1 Background -- 4.7.2 Brief considerations on pros and cons of SVM and MLP in regression problems -- 4.8 Classification by hidden Markov models and dynamic Bayesian networks: application to seismic waveforms of tectonic, volcani ... -- 4.8.1 Background -- 4.8.2 Signals related to volcanic and tectonic activity -- 4.8.3 Classification of icequake and nonterrestrial seismic waveforms as base for further research -HMM -- 4.8.3.1 Icequakes -- 4.8.3.2 Moon quakes. , 4.8.3.3 Classification of seismic waveforms using dynamic Bayesian networks -- 4.9 Natural hazard analyses-HMMs and BNs -- 4.9.1 Estimating volcanic unrest -- 4.9.2 Reasoning under uncertainty-tsunami early warning tasks -- Appendix 4.1. Normalization issues -- Appendix 4.2. SVM Regression -- Appendix 4.3. Bias-Variance Trade-off in Curve Fitting -- 5 - Applications with unsupervised learning -- 5.1 Introduction -- 5.2 Cluster analysis of volcanic tremor data -- 5.3 Density based clustering -- 5.4 Climate zones -- 5.5 Monitoring spectral characteristics of seismic signals and volcano alert -- 5.6 Directional features -- Appendix 5 -- Appendix 5.1 Davies-Bouldin index -- Appendix 5.2 Dunn index -- Appendix 5.3 Silhouette index -- Appendix 5.4 Gap index -- Appendix 5.5 Variation of information -- III - A posteriori analysis -- 6 - A posteriori analyses-advantages and pitfalls of pattern recognition techniques -- 6.1 Introduction -- 6.2 Testing issues -- 6.3 Measuring error -- 6.4 Targets -- 6.5 Objects -- 6.6 Features and metrics -- 6.7 Concluding remarks -- 6.7.1 Multilayer perceptrons -- 6.7.2 Support Vector Machines -- 6.7.3 MLP and SVM in regression analysis -- 6.7.4 Hidden Markov models and Bayesian networks -- 6.7.5 Supervised and unsupervised learning -- 7 - Software manuals -- 7.1 Example scripts related to Chapter 2 -- 7.1.1 Linear discrimination, principal components, and marginal distributions -- 7.1.2 The perceptron -- 7.1.3 Support Vector Machines -- 7.1.4 HMM example routines (from Theodoridis et al., 2010, see http://booksite.elsevier.com/9780123744869) -- 7.2 Example scripts and programs related to Chapter 3 (unsupervised learning) -- 7.2.1 K-means clustering -- 7.2.2 Mixed models -- 7.2.3 Expectation maximization clusters -- 7.2.4 Fuzzy clustering -- 7.2.5 Hierarchical clustering -- 7.2.6 Density-based clustering. , 7.2.7 Unsupervised learning toolbox: KKAnalysis -- 7.2.7.1 Preliminaries -- 7.2.7.2 Installation -- 7.2.7.3 Files -- 7.2.7.3.1 Input files -- 7.2.7.3.2 Output files -- 7.2.7.4 Getting started -- 7.2.7.4.1 The "Input File" frame -- 7.2.7.4.2 The "figures" frame -- 7.2.7.5 Configuring KKAnalysis-the "settings" -- 7.3 Programs related to applications (Chapter 4) -- 7.3.1 Back propagation neural network (BPNN) -- 7.3.2 SVM library -- 7.4 Miscellaneous -- 7.4.1 DMGA-generating ground deformation, magnetic and gravity data -- 7.4.2 Treating fault plane solution data -- Bibliography -- Bibliography -- Index -- A -- B -- C -- D -- E -- F -- G -- H -- I -- J -- K -- L -- M -- N -- O -- P -- Q -- R -- S -- T -- U -- V -- W -- X -- Back Cover.
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  • 2
    Publikationsdatum: 2021-03-01
    Beschreibung: Augmented Reality (AR) is a new way to interact with the world around us by means of the alteration of reality perceived through specific sensors. Virtual elements are indeed overlapped to our visual perception using a video camera or special glasses. In the light of this experience, the AR user will see real images mixed with virtual objects and movies, hear sounds, perceive tactile sensations and, in the next future, have olfactory experiences. We exploit AR features for dissemination purposes in the field of non-structural damage caused by earthquakes as part of our activities within the European project KnowRISK (Know your city, Reduce selSmic risK through non-structural elements). In this presentation, we propose an AR application that allows the user on the field to access information based on a geo database. Accordingly, the application can work in outdoor guided tours as well as field surveys in the form of a virtual assistant. The application requires a tablet and is developed using the WikitudeTM framework, provided by Wikitude GmbH (www.wikitude.com), under Android OS version 4+. From a technical point of view, it is based on the Wikitude Software Development Kit (SDK), which represents an all-in-one AR solution including image recognition and tracking, video overlay, and location based AR service. We developed our prototype application as field trip experience of the town of Noto (Italy), destroyed by an earthquake in 1693. In the middle Ages, the old town of Noto was an important and rich stronghold chosen by Arabs as chief town of one of the three districts (Val di Noto) in which Sicily was divided. Houses, churches, convents and monasteries in Noto were totally destroyed by earthquakes with intensity I=X-XI MCS between 1542 and 1693. The victims were 3,000 out of a total population of 12,000 inhabitants. Our AR application provides historical information on Noto along images and seismic data. Building-up similar tools can be useful not only for laypersons, but also for professionals in support to their field surveys.
    Beschreibung: Published
    Beschreibung: INGV - Osservatorio Etneo, Catania Italy
    Beschreibung: 7IT. Educazione e divulgazione scientifica
    Beschreibung: open
    Schlagwort(e): Seismic, Non structural elements ; 04. Solid Earth::04.06. Seismology::04.06.11. Seismic risk
    Repository-Name: Istituto Nazionale di Geofisica e Vulcanologia (INGV)
    Materialart: Poster session
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  • 3
    Publikationsdatum: 2019-12-05
    Beschreibung: Early-warning assessment of a volcanic unrest requires that accurate information from monitoring is continuously gathered before volcanic activity starts. Seismic data are an optimal source of such information, overcoming safety problems due to dangerous conditions for field surveys or cloud cover that may hinder visibility. We designed a multi-station warning system based on the classification of patterns of the background seismic radiation, so-called volcanic tremor, by using Self-Organizing Maps (SOM) and fuzzy clustering. The classifier automatically detects patterns that are typical footprints of volcanic unrest. The issuance of the SOM colors on DEM allows their geographical visualization according to the stations of detection; this spatial location makes it possible to infer areas potentially impacted by eruptive phenomena. Tested at Mt. Etna (Italy), the classifier forecasted in hindsight patterns associated with fast-rising magma (typical of lava fountains) as well as a relatively long lead time of the outburst (lava flows from eruptive fractures). Receiver Operating Characteristics (ROC) curves gave an Area Under the Curve (AUC) ∼0.8 indicative of a good detection accuracy that cannot be achieved from a mere random choice.
    Beschreibung: This work was supported by the MED-SUV project, which has received funding from the European Union’s Seventh Program for research, technological development and demonstration under grant agreement No 308665.
    Beschreibung: Published
    Beschreibung: id 6506
    Beschreibung: 4V. Processi pre-eruttivi
    Beschreibung: JCR Journal
    Schlagwort(e): Etna, Volcanic tremor ; Volcano Monitoring, Pattern recognition ; Self organizing map, Fuzzy clustering ; 04.06. Seismology ; 04.08. Volcanology ; 05.01. Computational geophysics
    Repository-Name: Istituto Nazionale di Geofisica e Vulcanologia (INGV)
    Materialart: article
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  • 4
    Publikationsdatum: 2019-04-04
    Beschreibung: To ensure an efficient natural risk management, we need an in-depth understanding and assessment of risk as well as the adoption of effective prevention measures. Modern techniques such as Augmented Reality (AR) and Virtual Reality (VR) offer the opportunity to explore our environment for professional as well as educational purposes, conveying useful information not only to scientists, but also to at-risk populations. “Virtual navigation on volcanoes by Augmented Reality and 3D-headset” was a geoevent we organized in the framework of the 6th edition of the Italian “Settimana del Pianeta Terra” (Week of Planet Earth) in October 2018. The geoevent featured AR and Virtual Reality exhibits, highlighting the benefits of these tools in applications for Earth monitoring, also with positive contributions in mitigation actions to reduce the impact of natural hazards. We proposed virtual 3D models of volcanic regions in Iceland and Italy (at Etna volcano), which guided the visitors in a virtual survey through hazardous contexts like landslide prone areas and fault zones. The event was supported as part of the 3DTeLC project funded through the Erasmus+ Key Action 2 Strategic Partnerships for Higher Education scheme (Project Reference: 2017-1-UK01-KA203-036719).
    Beschreibung: 3DTeLC project funded through the Erasmus+ Key Action 2 Strategic Partnerships for Higher Education scheme (Project Reference: 2017-1-UK01-KA203-036719)
    Beschreibung: Published
    Beschreibung: Vienna, Austria
    Beschreibung: 1TM. Formazione
    Schlagwort(e): virtual reality ; augmented reality ; natural risk management ; volcanic hazard
    Repository-Name: Istituto Nazionale di Geofisica e Vulcanologia (INGV)
    Materialart: Poster session
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  • 5
    Publikationsdatum: 2017-09-11
    Beschreibung: We analyze short- to long-term changes (from days to months) in Radon (Rn) activity measured nearby (〈2 km) the eruptive fractures that fed a lava effusion at Mt. Etna, Italy, between 13 May 2008 and 6 July 2009. The N120-1408E eruptive fractures opened between 3050 and 2620 m above sea level before a dike-forming intrusion fed the 14 month-long lava emission. Our high-rate data streams include: Rn, ambient parameters (barometric pressure and soil temperature), and seismic data (earthquakes and volcanic tremor) recorded from January 2008 to July 2009. The analysis highlights repeated episodes of rockfracturing related to seismic swarms, and vigorous gas pulses and peak values in Rn emissions (maximum 4.13105 Bq/m3 on 16 November 2008), which we interpreted in a conceptual model as the response to inputs from the magmatic system during the eruption. This multidisciplinary study: (i) provides evidence of a close relationship between Rn emission at a fumarole near the summit active craters and local earthquakes, and (ii) enables exploring the important role of the volcanic source on the temporal development of the Rn flux, which may account for the much higher ( 94 m/d) ascent speed of the Rn carrier (vapor) than diffusion. The close location of Rn probes to the active conduits, along with the application of our multidisciplinary approach, may shed new light on the internal dynamics of other active volcanoes worldwide.
    Beschreibung: Published
    Beschreibung: 2162–2176
    Beschreibung: 1T. Deformazione crostale attiva
    Beschreibung: 6T. Variazioni delle caratteristiche crostali e precursori
    Beschreibung: 2V. Struttura e sistema di alimentazione dei vulcani
    Beschreibung: 4V. Dinamica dei processi pre-eruttivi
    Beschreibung: JCR Journal
    Schlagwort(e): radon ; etna ; Solid Earth
    Repository-Name: Istituto Nazionale di Geofisica e Vulcanologia (INGV)
    Materialart: article
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  • 6
    Publikationsdatum: 2018-03-21
    Beschreibung: KnowRISK (Know your city, Reduce seISmic risK through non-structural elements) is a European project that addresses prevention measures to reduce non-structural damage caused by earthquakes. It is built on risk communication and takes action on pilot areas of the three participating countries: Portugal, Iceland, and Italy. The setting up of risk communication strategies in the project stands on the understanding local communities fragility, on their direct engagement, and on a holistic approach to vulnerability. The level of relevance of seismic compared to other hazards, the understanding, the memory of past disasters are indicators that affect the way a risk is perceived and preventive measures are taken. Similarly, the level of education, wealth, exposure to other, social, risks are aggravation parameters in risk computation to be accounted for when we communicate risk. Strategies for risk communication in KnowRISK rely on schools and citizen’s engagement, citizen’s science activities, tools for raising awareness.
    Beschreibung: Published
    Beschreibung: Reykjavik, Iceland
    Beschreibung: 2TM. Divulgazione Scientifica
    Schlagwort(e): Risk communication ; non-structural components ; earthquake hazard ; seismic risk reduction ; 04. Solid Earth::04.06. Seismology::04.06.11. Seismic risk
    Repository-Name: Istituto Nazionale di Geofisica e Vulcanologia (INGV)
    Materialart: Conference paper
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  • 7
    Publikationsdatum: 2019-01-22
    Beschreibung: KnowRISK (Know your city, Reduce seISmic risK through non-structural elements) is a European project that addresses prevention measures to reduce non-structural damage caused by earthquakes. It is built on risk communication and takes action on pilot areas of the three participating countries: Portugal, Iceland, and Italy. The setting up of risk communication strategies in the project stands on the understanding local communities fragility, on their direct engagement, and on a holistic approach to vulnerability. The level of relevance of seismic compared to other hazards, the understanding, the memory of past disasters are indicators that affect the way a risk is perceived and preventive measures are taken. Similarly, the level of education, wealth, exposure to other, social, risks are aggravation parameters in risk computation to be accounted for when we communicate risk. Strategies for risk communication in KnowRISK rely on schools and citizen’s engagement, citizen’s science activities, tools for raising awareness.
    Beschreibung: Published
    Beschreibung: 413-427
    Beschreibung: 2TM. Divulgazione Scientifica
    Schlagwort(e): Risk communication ; non-structural components ; earthquake hazard ; seismic risk reduction ; 04. Solid Earth ; 04.06. Seismology ; 04.06.11. Seismic risk
    Repository-Name: Istituto Nazionale di Geofisica e Vulcanologia (INGV)
    Materialart: book chapter
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  • 8
    Publikationsdatum: 2019-03-26
    Beschreibung: Some researchers view radon emissions as a precursor to earthquakes, especially those of high magnitude [e.g., Wang et al., 2014; Lombardi and Voltattorni, 2010], but the debate in the scientific community about the applicability of the gas to surveillance systems remains open. Yet radon “works” at Italy’s Mount Etna, one of the world’s most active volcanoes, although not specifically as a precursor to earthquakes. In a broader sense, this naturally radioactive gas from the decay of uranium in the soil, which has been analyzed at Etna in the past few years, acts as a tracer of eruptive activity and also, in some cases, of seismic–tectonic phenomena. To deepen the understanding of tectonic and eruptive phenomena at Etna, scientists analyzed radon escaping from the ground and compared those data with measurements gathered continuously by instrumental networks on the volcano. Here Etna is a boon to scientists—it’s traced by roads, making it easy to access for scientific observation. Dense monitoring networks, managed by the Istituto Nazionale di Geofisica e Vulcanologia, Catania–Osservatorio Etneo (INGV-OE), have been continuously observing the volcano for more than 40 years. This continuous dense monitoring made the volcano the perfect open-air laboratory for deciphering how eruptive activity may influence radon emissions.
    Beschreibung: This work was supported by the Mediterranean Supersite Volcanoes (MED-SUV) project, which has received funding from the European Union’s Seventh Framework Programme for research, technological development, and demonstration under grant agreement 308665.
    Beschreibung: Published
    Beschreibung: 7
    Beschreibung: 4V. Processi pre-eruttivi
    Beschreibung: N/A or not JCR
    Schlagwort(e): Radon ; seismic activity ; Etna ; volcanic activity ; 04.08. Volcanology
    Repository-Name: Istituto Nazionale di Geofisica e Vulcanologia (INGV)
    Materialart: article
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  • 9
    facet.materialart.
    Unbekannt
    Springer International Publishing AG, part of Springer Nature
    Publikationsdatum: 2019-01-21
    Beschreibung: To communicate the importance of knowing the risk of non-structural damage caused by earthquakes, we developed applications based on Augmented Reality (AR) features. These applications run on mobile devices, such as tablets and smartphones, by using their video camera and other on-board sensors, such as GPS, accelerometer, and gyrocompass, from which AR users do take advantage. Combined with a specifically designed exhibit, our AR applications can contribute to increase the common awareness on seismic risk, providing useful information on how to have safer homes in case of an earthquake. Building codes do not take into account non-structural elements, leaving communities at risk of injuries, blocking escapes and even causing deaths. In this framework, the personal preparedness is of paramount importance. The development of our AR applications is supported by the European project KnowRISK (Know your city, Reduce seISmic risK through non-structural elements).
    Beschreibung: Published
    Beschreibung: 485-492
    Beschreibung: 2TM. Divulgazione Scientifica
    Schlagwort(e): seismic hazard ; augmented reality ; 04.06. Seismology
    Repository-Name: Istituto Nazionale di Geofisica e Vulcanologia (INGV)
    Materialart: book chapter
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  • 10
    Publikationsdatum: 2018-03-21
    Beschreibung: To communicate the importance of knowing the risk of non-structural damage caused by earthquakes, we developed applications based on Augmented Reality (AR) features. These applications run on mobile devices, such as tablets and smartphones, by using their video camera and other on-board sensors, such as GPS, accelerometer, and gyrocompass, from which AR users do take advantage. Combined with a specifically designed exhibit, our AR applications can contribute to increase the common awareness on seismic risk, providing useful information on how to have safer homes in case of an earthquake. Building codes do not take into account non-structural elements, leaving communities at risk of injuries, blocking escapes and even causing deaths. In this framework, the personal preparedness is of paramount importance. The development of our AR applications is supported by the European project KnowRISK (Know your city, Reduce seISmic risK through non-structural elements).
    Beschreibung: Published
    Beschreibung: Reykjavik, Iceland
    Beschreibung: 2TM. Divulgazione Scientifica
    Schlagwort(e): Non-structural damage ; Earthquake hazard ; Augmented reality ; Risk reduction ; Dissemination ; 04. Solid Earth::04.06. Seismology::04.06.11. Seismic risk
    Repository-Name: Istituto Nazionale di Geofisica e Vulcanologia (INGV)
    Materialart: Conference paper
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