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1 – 10 of 27Wei Zhou, Wei Yuan, Gang Ma and Xiao-Lin Chang
The purpose of this paper is to propose a novel combined finite-discrete element method (FDEM), based on the cohesive zone model, for simulating rockslide problems at the…
Abstract
Purpose
The purpose of this paper is to propose a novel combined finite-discrete element method (FDEM), based on the cohesive zone model, for simulating rockslide problems at the laboratory scale.
Design/methodology/approach
The combined FDEM is realized using ABAQUS/Explicit. The rock mass is represented as a collection of elastic bulk elements glued by cohesive elements with zero thickness. To reproduce the tensile and shear micro-fractures in rock material, the Mohr-Coulomb model with tension cut-off is employed as the damage initiation criterion of cohesive elements. Three simulated laboratory tests are considered to verify the capability of combined FDEM in reproducing the mechanical behavior of rock masses. Three slope models with different joint inclinations are taken to illustrate the application of the combined FDEM to rockslide simulation.
Findings
The results show that the joint inclination is an important factor for inducing the progressive failure behavior. With a low joint inclination, the slope failure process is observed to be a collapse mode. As the joint inclination becomes higher, the failure mode changes to sliding and the steady time of rock blocks is shortened. Moreover, the runout distance and post-failure slope angle decrease as the joint inclination increases.
Originality/value
These studies indicate that the combined FDEM performed within ABAQUS can simulate slope stability problems for research purposes and is useful for studying the slope failure mechanism comprehensively.
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The purpose of this paper is to show how the common practice of applying the frequency interpretation of probability in risk analysis of so‐called low‐probability and…
Abstract
Purpose
The purpose of this paper is to show how the common practice of applying the frequency interpretation of probability in risk analysis of so‐called low‐probability and high‐consequence disasters can prove to be flawed, and to present a possible remedy.
Design/methodology/approach
The common practice is reviewed by using the Åknes case from Norway where an up to 100 million m3 rock slide is threatening one of Norway's most visited tourist sites, Geiranger. The same case is also reworked using the alternative approach and then a comparison is made. The study is therefore a comparative study.
Findings
The paper clearly shows the fallacy of using the frequency interpretation of probability in cases where the data are limited because the natural disasters under study appear very rarely. By exploiting the fact that responsible decision‐makers in public offices cannot claim that human losses today are worse than human losses tomorrow (human lives cannot be discounted, as it were), the alternative approach provides much more realistic decision‐support.
Practical implications
The paper presents a new approach to analyzing the risk of low probability, high impact natural disasters that can be readily applied in other low probability, high consequence cases.
Originality/value
As far as is known, the paper presents an original contribution to the analysis of risk of low probability, high consequence natural disasters in that it is shown that the commonly used frequency interpretation of probability can prove to be flawed in such cases. An alternative approach is provided.
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Chiara Bertolin and Elena Sesana
The overall objective of this study is envisaged to provide decision makers with actionable insights and access to multi-risk maps for the most in-danger stave churches (SCs…
Abstract
Purpose
The overall objective of this study is envisaged to provide decision makers with actionable insights and access to multi-risk maps for the most in-danger stave churches (SCs) among the existing 28 churches at high spatial resolution to better understand, reduce and mitigate single- and multi-risk. In addition, the present contribution aims to provide decision makers with some information to face the exacerbation of the risk caused by the expected climate change.
Design/methodology/approach
Material and data collection started with the consultation of the available literature related to: (1) SCs' conservation status, (2) available methodologies suitable in multi-hazard approach and (3) vulnerability leading indicators to consider when dealing with the impact of natural hazards specifically on immovable cultural heritage.
Findings
The paper contributes to a better understanding of place-based vulnerability with local mapping dimension also considering future threats posed by climate change. The results highlight the danger at which the SCs of Røldal, in case of floods, and of Ringebu, Torpo and Øye, in case of landslide, may face and stress the urgency of increasing awareness and preparedness on these potential hazards.
Originality/value
The contribution for the first time aims to homogeneously collect and report all together existing spread information on architectural features, conservation status and geographical attributes for the whole group of SCs by accompanying this information with as much as possible complete 2D sections collection from existing drawings and novel 3D drawn sketches created for this contribution. Then the paper contributes to a better understanding of place-based vulnerability with local mapping dimension also considering future threats posed by climate change. Then it highlights the danger of floods and landslides at which the 28 SCs are subjected. Finally it reports how these risks will change under the ongoing impact of climate change.
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Plans to rid Egypt of its slums.
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DOI: 10.1108/OXAN-DB243722
ISSN: 2633-304X
Keywords
Geographic
Topical
The purpose of this paper is to attempt to generate a better, systematic and scientific understanding of the basic reasons behind slope instability to help in developing the basic…
Abstract
Purpose
The purpose of this paper is to attempt to generate a better, systematic and scientific understanding of the basic reasons behind slope instability to help in developing the basic principles of landslide hazard zonation, monitoring and forecasting of landslide hazards for better and more effective landslide hazard mitigation and management.
Design/methodology/approach
The study is based on extensive field observations and intensive reviews of literature from secondary sources.
Findings
Mass movements especially landslides as they are known to common man are a recurring natural phenomenon and are an integral part of any geological/geomorphological circle of landform development through sequential development of slopes in any elevated region and especially in young fold mountain chains.
Practical implications
The paper presents a valuable insight into the basic reasons behind a landslide to spread awareness, to educate and sensitize people towards better and effective landslide hazard mitigation and thereby ensure people's participation in disaster management. It also aims to initiate and encourage research in the field of landslide management.
Originality/value
Landslides occur frequently and without any appreciable warning as such causing havoc and often insurmountable damage to life and property but despite their uncertainty, their causative factors and indicators of slope instability are very well known to an extent that the magnitude of these events, susceptible areas, the timing of such events and their potential impact can be studied, analyzed and evaluated on the basis of past occurrences and existing knowledge to mitigate their impact. The real value of the present study is to minimize losses due to landslides through better knowledge and enhanced levels of understanding of the phenomenon and its management by simply avoiding those particular reasons that could lead to slope instability problems.
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The purpose of this study is to respond to the Journal of Historical Research in Marketing special issue call for discussions that can assist advertising and marketing history…
Abstract
Purpose
The purpose of this study is to respond to the Journal of Historical Research in Marketing special issue call for discussions that can assist advertising and marketing history researchers locate primary sources of interest to their research by describing the resources available through the online family history websites Ancestry.com and FindMyPast.com.
Design/methodology/approach
Brief histories of Ancestry and FindMyPast are presented, based on publicly available records and secondary sources. This paper explains the types of data researchers can access via Ancestry.com and FindMypast.com, the costs of access and then provides some examples of how these resources have been used in past research by marketing and advertising historians.
Findings
Family history websites such as Ancestry and FindMyPast can provide researchers with access to a wide variety of data sources, such as census and voting records; immigration records; city directories; birth, marriage and death records; military records; and almanacs and gazetteers, but at a cost. In some cases, paying for digital access to records is more convenient, timely and can cost less than travelling to access these same documents in physical form. Depending on the researcher’s geographical location and the country from which records are sought, this can add up to quite a cost savings. When using these sources, it is wise to determine which database contains more of the records you are searching for; Ancestry tends to have better US and Canadian resources, while FindMyPast covers the UK better.
Originality/value
Researchers interested in conducting advertising and marketing history research need access to primary data sources. Given restricted travel budgets and, indeed, restricted travel under COVID-19 conditions, gaining access to primary sources in digital form can allow researchers to continue their work. At any time, gaining access to digital records without having to travel can speed up the research process. Researchers new to the field, and those with many years of experience, can benefit from learning more about family history databases as primary data sources.
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Julien Baddour and Jacques Percebois
The aim of this paper is to propose answers to such questions as: are major road projects currently implemented on Reunion Island sufficient to conclusively solve the problems of…
Abstract
Purpose
The aim of this paper is to propose answers to such questions as: are major road projects currently implemented on Reunion Island sufficient to conclusively solve the problems of traffic congestion and urban sprawl? What coercive measures are to be implemented by local authorities for post‐project period management? Which option should be chosen: congestion charges and regulations, or access rights and permits?
Design/methodology/approach
This paper is in four parts. First, the paper explains the various constraints to be overcome in road infrastructure and land development. Then the main characteristics of road transport are described. Third, the characteristics, cost and expected role are presented. Last, the various solutions are compared.
Findings
Developing road infrastructures may appear as a solution to the congestion problem. Therefore, only quality public transport development and incentive measures to control traffic can reduce road congestion in the long run – provided the alternative is technically feasible, economically motivating and reliable enough for motorists to leave their cars at home.
Originality/value
The originality of this paper is to underline the specific constraints dictated by its geographical features resulting in additional costs and technical difficulties and to mention the disastrous effects of its essentially car‐based transportation policy. It also suggests the implementation of traffic permits or tolls to access to the road infrastructures even if of such policies is not easy due to a lot of social constraints.
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Egyptian government's new policy towards informal settlements.
Details
DOI: 10.1108/OXAN-DB199901
ISSN: 2633-304X
Keywords
Geographic
Topical
Ravindra K. Pande and Rajnish Pande
The purpose of the paper is to persuade all partners in disaster management to take action and create a pair of synergistic and invincible forces – government and people – that…
Abstract
Purpose
The purpose of the paper is to persuade all partners in disaster management to take action and create a pair of synergistic and invincible forces – government and people – that interact to bring about a reduction in the impact of natural hazards in Uttaranchal, India.
Design/methodology/approach
There is an urgent need for a comprehensive tool to make the community aware of its right to safety. Today, policies and planning for disaster management are a State subject, in which the participation of the community is negligible. Therefore, disaster management has become supply‐driven instead of demand‐driven.
Findings
A Citizen's Charter of Disaster Management is considered to be another appropriate tool to bring in citizen‐centric governance. The Charter aspires to meet the present and anticipated needs of citizens in an efficient manner by eradicating errors and wastage through a scientific approach with participation between government and citizens.
Research limitations/implications
The analysis is based on the experience gained over a period of seven years (1999‐2005). The period is short for developing any hypothesis, but sufficient care has been taken to consider vital factors.
Practical implications
With the help of the Citizen's Charter of Disaster Management, the quality of public services can be improved. To make society safer it is required that people should know the mandate of the Department of Disaster Management concerned, how one can get in touch with its officials, what to expect by way of services, and how to seek a remedy if something goes wrong.
Originality/value
The Citizen's Charter of Disaster Management does not by itself create new legal rights, but it certainly helps in enforcing existing rights.
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