Tsunami Hazard Evaluation at Selected Locations Along the South Andhra Coast: Numerical Modeling and Field Observations

2011 ◽  
Vol 34 (1) ◽  
pp. 29-47 ◽  
Author(s):  
V. Ranga Rao ◽  
N. T. Reddy ◽  
J. Sriganesh ◽  
M. V. Ramana Murthy ◽  
Tad S. Murty
2014 ◽  
Vol 14 (9) ◽  
pp. 2627-2635 ◽  
Author(s):  
Z. Feng ◽  
B. Li ◽  
Y. P. Yin ◽  
K. He

Abstract. Calcareous mountainous areas are highly prone to geohazards, and rockslides play an important role in cliff retreat. This study presents three examples of failures of limestone cliffs with subhorizontal bedding in the southwestern calcareous area of China. Field observations and numerical modeling of Yudong Escarpment, Zengzi Cliff, and Wangxia Cliff showed that pre-existing vertical joints passing through thick limestone and the alternation of competent and incompetent layers are the most significant features for rockslides. A "hard-on-soft" cliff made of hard rocks superimposed on soft rocks is prone to rock slump, characterized by shearing through the underlying weak strata along a curved surface and backward tilting. When a slope contains weak interlayers rather than a soft basal, a rock collapse could occur from the compression fracture and tensile split of the rock mass near the interfaces. A rockslide might shear through a hard rock mass if no discontinuities are exposed in the cliff slope, and sliding may occur along a moderately inclined rupture plane. The "toe breakout" mechanism mainly depends on the strength characteristics of the rock mass.


Werkwinkel ◽  
2014 ◽  
Vol 9 (1) ◽  
pp. 55-73
Author(s):  
Ruben van Luijk

Abstract The article gives a brief ‘idea history’ of Hesperian melancholy a.k.a. Hesperian depression, the fleeting state of dejection that some humans and animals experience at dusk. The term was apparently coined by the South African poet and naturalist Eugene Marais (1871-1936), who noticed the phenomenon during his field observations of baboons. Marais' observations of primates were in the first place an attempt to shed more light on the evolutionary roots of the human psyche and its afflictions - not in the least his own. A personal focus seems probable in his notes on the use of euphoria-inducing substances among animals and humans, which are an evident reflection of his own morphine addiction; but also in his writings about Hesperian depression. During his lifetime, Marais only published about Hesperian depression twice, once in a very concise article in English, and once in more elaborate form in Afrikaans. The term ‘Hesperian depression’ only became more current when his manuscript on primate behaviour, The Soul of the Ape, was posthumously published in 1963. Since then, the term and its description sometimes appear in (popular) publications of paleobiologists and scholars of the evolution of human behaviour. In psychology and psychiatry, the term was introduced by the eminent American psychoanalyst William G. Niederlander, who presented it in a 1971 article in Journal of the American Psychoanalytic Association as an idea of his own. It is evident, however, that he took his cue from Marais, who thus was posthumously plagiarized.


2016 ◽  
Vol 52 (3) ◽  
pp. 1591-1606 ◽  
Author(s):  
Ylva Sjöberg ◽  
Ethan Coon ◽  
A. Britta K. Sannel ◽  
Romain Pannetier ◽  
Dylan Harp ◽  
...  

Author(s):  
Mauricio Fuentes Serrano ◽  
Sebastián Riquelme Muñoz ◽  
Miguel Medina ◽  
Matias Mocanu ◽  
Rodrigo Filippi Fernandez

2012 ◽  
Vol 12 (1) ◽  
pp. 151-163 ◽  
Author(s):  
A. Grezio ◽  
P. Gasparini ◽  
W. Marzocchi ◽  
A. Patera ◽  
S. Tinti

Abstract. We present a first detailed tsunami risk assessment for the city of Messina where one of the most destructive tsunami inundations of the last centuries occurred in 1908. In the tsunami hazard evaluation, probabilities are calculated through a new general modular Bayesian tool for Probability Tsunami Hazard Assessment. The estimation of losses of persons and buildings takes into account data collected directly or supplied by: (i) the Italian National Institute of Statistics that provides information on the population, on buildings and on many relevant social aspects; (ii) the Italian National Territory Agency that provides updated economic values of the buildings on the basis of their typology (residential, commercial, industrial) and location (streets); and (iii) the Train and Port Authorities. For human beings, a factor of time exposition is introduced and calculated in terms of hours per day in different places (private and public) and in terms of seasons, considering that some factors like the number of tourists can vary by one order of magnitude from January to August. Since the tsunami risk is a function of the run-up levels along the coast, a variable tsunami risk zone is defined as the area along the Messina coast where tsunami inundations may occur.


2015 ◽  
Vol 65 (1) ◽  
pp. 73-79 ◽  
Author(s):  
Manuel Jara ◽  
Daniel Pincheira-Donoso

Animal species have evolved a remarkable diversity of defensive phenotypic strategies aimed to deceive predators and other forms of danger. By relying on deception, these adaptations increase the chances of avoiding physical contact that may otherwise have very high fitness costs. One such deceptive behaviour is the popularly-known neck flattening, or “hooding”, observed in some snakes. Hooding consists in the lateral expansion and dorso-ventral flattening of the neck, which creates the impression of a bigger opponent during confrontations. This trait is highly characteristic of cobras (Elapidae family). However, neck flattening is not exclusive to elapids, and has in fact been observed in a few other snake lineages, including some species of the families Lamprophiidae and Colubridae. Here, we present the first report of hooding behaviour in the South American colubrid genus Philodryas, based on field observations conducted on the Chilean species P. chamissonis (the long-tailed snake). Our report adds to the few cases in which this deceptive behaviour has been observed in snakes outside the cobra family.


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