scholarly journals Multilayer-HySEA model validation for landslide generated tsunamis. Part II Granular slides

Author(s):  
Jorge Macías ◽  
Cipriano Escalante ◽  
Manuel J. Castro

Abstract. The overall objective of the present work is to benchmark the novel Multilayer-HySEA model using laboratory experiment data for landslide generated tsunamis. In particular, this second part of the work deals with granular slides, while the first part, in a companion paper, considers rigid slides. The experimental data used have been proposed by the US National Tsunami Hazard and Mitigation Program (NTHMP) and established for the NTHMP Landslide Benchmark Workshop, held in January 2017 at Galveston. Three of the seven benchmark problems proposed in that workshop dealt with tsunamis generated by rigid slides and are collected in the companion paper (Macías et al., 2020). Another three benchmarks considered tsunamis generated by granular slides. They are the subject of the present study. In order to reproduce the laboratory experiments dealing with granular slides, two models need to be coupled, one for the granular slide and a second one for the water dynamics. The coupled model used consists of a new and efficient hybrid finite volume/finite difference implementation on GPU architectures of a non-hydrostatic multilayer model coupled with a Savage-Hutter model. A brief description of model equations and the numerical scheme is included. The dispersive properties of the multilayer model can be found in the companion paper. Then, results for the three NTHMP benchmark problems dealing with tsunamis generated by granular slides are presented with a description of each benchmark problem.

2021 ◽  
Vol 21 (2) ◽  
pp. 791-805
Author(s):  
Jorge Macías ◽  
Cipriano Escalante ◽  
Manuel J. Castro

Abstract. The final aim of the present work is to propose a NTHMP-benchmarked numerical tool for landslide-generated tsunami hazard assessment. To achieve this, the novel Multilayer-HySEA model is validated using laboratory experiment data for landslide-generated tsunamis. In particular, this second part of the work deals with granular slides, while the first part, in a companion paper, considers rigid slides. The experimental data used have been proposed by the US National Tsunami Hazard and Mitigation Program (NTHMP) and were established for the NTHMP Landslide Benchmark Workshop, held in January 2017 at Galveston (Texas). Three of the seven benchmark problems proposed in that workshop dealt with tsunamis generated by rigid slides and are collected in the companion paper (Macías et al., 2021). Another three benchmarks considered tsunamis generated by granular slides. They are the subject of the present study. The seventh benchmark problem proposed the field case of Port Valdez, Alaska, 1964 and can be found in Macías et al. (2017). In order to reproduce the laboratory experiments dealing with granular slides, two models need to be coupled: one for the granular slide and a second one for the water dynamics. The coupled model used consists of a new and efficient hybrid finite-volume–finite-difference implementation on GPU architectures of a non-hydrostatic multilayer model coupled with a Savage–Hutter model. To introduce the multilayer model more fluidly, we first present the equations of the one-layer model, Landslide-HySEA, with both strong and weak couplings between the fluid layer and the granular slide. Then, a brief description of the multilayer model equations and the numerical scheme used is included. The dispersive properties of the multilayer model can be found in the companion paper. Then, results for the three NTHMP benchmark problems dealing with tsunamis generated by granular slides are presented with a description of each benchmark problem.


Author(s):  
Jorge Macías ◽  
Cipriano Escalante ◽  
Manuel J. Castro

Abstract. The present work is devoted to the benchmarking of the Multilayer-HySEA model using laboratory experiment data for landslide generated tsunamis. This first part of the work deals with rigid slides and the second part, in a companion paper, with granular slides. The US National Tsunami Hazard and Mitigation Program (NTHMP) has proposed the experimental data used and established for the NTHMP Landslide Benchmark Workshop, held in January 2017 at Galveston. The first three benchmark problems proposed in this workshop dealt with rigid slides, simulated as a moving bottom topography, that must be imposed as a prescribed boundary condition. These three benchmarks are used here to validate the Multilayer-HySEA model. This new model of the HySEA family consists of an efficient hybrid finite volume/finite difference implementation on GPU architectures of a non-hydrostatic multilayer model. A brief description of model equations, its dispersive properties, and the numerical scheme is included. The benchmarks are described and the numerical results compared against the lab measured data for each of them. The specific aim of the present work is to validate this new code for tsunamis generated by rigid slides. Nevertheless, the overall objective of the current benchmarking effort is to produce a ready-to-use numerical tool for real world landslide generated tsunami hazard assessment. This tool has already been used to reproduce the Port Valdez Alaska 1969 event.


2021 ◽  
Vol 21 (2) ◽  
pp. 775-789 ◽  
Author(s):  
Jorge Macías ◽  
Cipriano Escalante ◽  
Manuel J. Castro

Abstract. This paper is devoted to benchmarking the Multilayer-HySEA model using laboratory experimental data for landslide-generated tsunamis. This article deals with rigid slides, and the second part, in a companion paper, addresses granular slides. The US National Tsunami Hazard and Mitigation Program (NTHMP) has proposed the experimental data used and established for the NTHMP Landslide Benchmark Workshop, held in January 2017 at Galveston (Texas). The first three benchmark problems proposed in this workshop deal with rigid slides. Rigid slides must be simulated as a moving bottom topography, and, therefore, they must be modeled as a prescribed boundary condition. These three benchmarks are used here to validate the Multilayer-HySEA model. This new HySEA model consists of an efficient hybrid finite-volume–finite-difference implementation on GPU architectures of a non-hydrostatic multilayer model. A brief description of model equations, dispersive properties, and the numerical scheme is included. The benchmarks are described and the numerical results compared against the lab-measured data for each of them. The specific aim is to validate this new code for tsunamis generated by rigid slides. Nevertheless, the overall objective of the current benchmarking effort is to produce a ready-to-use numerical tool for real-world landslide-generated tsunami hazard assessment. This tool has already been used to reproduce the Port Valdez, Alaska, 1964 and Stromboli, Italy, 2002 events.


1994 ◽  
Vol 9 (4) ◽  
pp. 327-354 ◽  
Author(s):  
Ian Watson ◽  
Farhi Marir

AbstractCase-Based Reasoning (CBR) is a relatively recent problem solving technique that is attracting increasing attention. However, the number of people with first-hand theoretical or practical experience of CBR is still small. The main objective of this review is to provide a comprehensive overview of the subject to people new to CBR. The paper outlines the development of CBR in the US in the 1980s. It describes the fundamental techniques of CBR and contrasts its approach to that of model-based reasoning systems.1A critical review of currently available CBR software tools is followed by descriptions of CBR applications both from academic research and, in more detail, three CBR systems that are presently being used commercially. Each of the three commercial case studies highlights features that made CBR particularly suitable for the application. Moreover, the last case study describes a development methodology for implementing CBR systems. The paper concludes with a research agenda for CBR. A detailed categorized bibliography of CBR research is provided in a companion paper (Marir & Watson, 1994).


2009 ◽  
Vol 27 (1) ◽  
pp. 65-92
Author(s):  
Susan Jones

This article explores the diversity of British literary responses to Diaghilev's project, emphasising the way in which the subject matter and methodologies of Diaghilev's modernism were sometimes unexpectedly echoed in expressions of contemporary British writing. These discussions emerge both in writing about Diaghilev's work, and, more discretely, when references to the Russian Ballet find their way into the creative writing of the period, serving to anchor the texts in a particular cultural milieu or to suggest contemporary aesthetic problems in the domain of literary aesthetics developing in the period. Figures from disparate fields, including literature, music and the visual arts, brought to their criticism of the Ballets Russes their individual perspectives on its aesthetics, helping to consolidate the sense of its importance in contributing to the inter-disciplinary flavour of modernism across the arts. In the field of literature, not only did British writers evaluate the Ballets Russes in terms of their own poetics, their relationship to experimentation in the novel and in drama, they developed an increasing sense of the company's place in dance history, its choreographic innovations offering material for wider discussions, opening up the potential for literary modernism's interest in impersonality and in the ‘unsayable’, discussions of the body, primitivism and gender.


2020 ◽  
Vol 65 (2) ◽  
pp. 297-319
Author(s):  
Aluaș Alina

"The Theatrical Potential in David Foenkinos’ Work. Analysis of the Novel, the Scenario and the Film “La Délicatesse”. Our interest, especially when it comes to the subject of literature, is to show the manner in which the text processing done by the author (script writer/director) brings to light the guidelines of the novelistic text’s semantics, which under careful analysis reveals a kind of personal myth of the novelist. The skewed, syncopated, interrupted writing which disrupts the chronotope serves the needs of the script as well as the director’s selective vision. Unconsciously, the novel seems to follow the structure of the theatrical model. These traits can also be found in the cinematographic structure of the film. Keywords: love, eroticism, delicacy, theatricality, scenario, film. "


2020 ◽  
Vol 18 (1/2020) ◽  
pp. 33-67
Author(s):  
Olga Stevanovic

The subject of this paper encompasses US policy towards Poland and the Baltic States regarding energy security during Donald Trump’s presidency. It is discernible that vast domestic energy resources have created an opportunity for the US to project more power to these countries, and the surrounding region. We argue that Trump and his administration’s perceptions have served as an intervening variable in that opportunity assessment, in accordance with the neoclassical realist theory. The main research question addressed in this paper is whether US has used that opportunity to contribute to energy security in countries it has traditionally deemed as allies. Two aspects of US approach to energy security of the designated countries are taken into consideration: liquified natural gas exports and support for the Three Seas Initiative. The way Trump presented his policy and its results in his public statements has also been considered in this paper. The article will proceed as follows. The first subsection of the paper represents a summary of energy security challenges in Poland and the Baltic States. The second subsection is dedicated to the opportunity for the US to project energy power and to Trump’s perceptions relevant for the opportunity assessment. The third subsection deals with American LNG exports to these countries as a possible way for contributing to energy security in Poland and the Baltic States. The last part of the paper addresses the Three Seas Initiative and US approach to this platform.


2017 ◽  
Vol 12 (1) ◽  
pp. 39-57
Author(s):  
Jamie McKeown

This article reports the findings from a study of discursive representations of the future role of technology in the work of the US National Intelligence Council (NIC). Specifically, it investigates the interplay of ‘techno-optimism’ (a form of ideological bias) and propositional certainty in the NIC’s ‘Future Global Trends Reports’. In doing so, it answers the following questions: To what extent was techno-optimism present in the discourse? What level of propositional certainty was expressed in the discourse? How did the discourse deal with the inherent uncertainty of the future? Overall, the discourse was pronouncedly techno-optimist in its stance towards the future role of technology: high-technological solutions were portrayed as solving a host of problems, despite the readily available presence of low-technology or no-technology solutions. In all, 75.1% of the representations were presented as future categorical certainties, meaning the future was predominantly presented as a known and closed inevitability. The discourse dealt with the inherent uncertainty of the subject matter, that is, the future, by projecting the past and present into the future. This was particularly the case in relation to the idea of technological military dominance as a guarantee of global peace, and the role of technology as an inevitable force free from societal censorship.


2012 ◽  
Vol 40 (1) ◽  
pp. 99-115 ◽  
Author(s):  
Chase Pielak

In George Eliot'sDanielDeronda, animal vitality figures prominently in shaping the human shell, to use an opening animal metaphor. Approaching the significance of the animal leads to a reading of Gwendolen Grandcourt's character as a responsible creature. Gwendolen is Eliot's heroine, one half of the pair of protagonists around whom the novel revolves. Eliot's fantastic character takes shape in three movements, each punctuated by its own animal metaphor: Gwendolen morphs from Lamia to mastered-animal to white doe. Animal imagery appears at the edge of the human, the point at which humanity gains and loses subjectivity, and Gwendolen's novel is fundamentally one of finding her place in the world, her singularity, her responsibility. Images of animals stand in the linguistic gaps – in the places words fail – to figure the subject.1Animals appear at the end of the ability of language to mean. Nevertheless, this analysis is not intended to encompass the complex range of animal representations in George's Eliot's oeuvre, or even to catalog every example inDaniel Deronda. Instead, it suggests the possibility of using animal metaphor as a map for reading a Victorian heroine.


Transilvania ◽  
2021 ◽  
pp. 121-127
Author(s):  
Anca-Simina Martin

Jews as a collective have long served as scapegoats for epidemics and pandemics, such as the Bubonic Plague and, according to some scholars, the 1918–1920 influenza pandemic. This practice reemerged in the early days of the Covid-19 pandemic, when more and more fake news outlets in the US and Europe started publishing articles on a perceived linkage between Jewish communities and the novel coronavirus. What this article aims to achieve is to facilitate a dialogue between the observations on the phenomenon made by the Elie Wiesel National Institute for the Study of the Holocaust in Romania and the latest related EU reports, with a view to charting its beginnings in Romania in relation to other European countries and in an attempt to see whether Romania, like France and Germany, has witnessed the emergence of “grey area” discourses which are not fully covered by International Holocaust Remembrance Alliance working definition of antisemitism.


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