A new global landslide dam database (RAGLAD) and analysis utilizing auxiliary global fluvial datasets

AbstractTo address the current data and understanding knowledge gap in landslide dam inventories related to geomorphological parameters, a new global-scale landslide dam dataset named River Augmented Global Landslide Dams (RAGLAD) was created. RAGLAD is a collection of landslide dam records from multiple data sources published in various languages and many of these records we have been able to precisely geolocate. In total, 779 landslide dam records were compiled from 34 countries/regions. The spatial distribution, time trend, triggers, and geomorphological characteristic of the landslides and catchments where landslide dams formed are summarized. The relationships between geomorphological characteristics for landslides that form river dams are discussed and compared with those of landslides more generally. Additionally, a potential threshold for landslide dam formation is proposed, based on the relationship of landslide volume to river width. Our findings from our analysis of the value of the use of additional fluvial datasets to augment the database parameters indicate that they can be applied as a reliable supplemental data source, when the landslide dam records were accurately and precisely geolocated, although location precision in smaller river catchment areas can result in some uncertainty at this scale. This newly collected and supplemented dataset will allow the analysis and development of new relationships between landslides located near rivers and their actual propensity to block those particular rivers based on their geomorphology.

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The communication of intellectual capital: the “whys” and “whats”

Journal of Intellectual Capital ◽

10.1108/jic-01-2016-0007 ◽

2016 ◽

Vol 17 (3) ◽

pp. 414-438 ◽

Cited By ~ 2

Author(s):

Janet C.N. Wee ◽

Alton Y.K. Chua

Keyword(s):

Human Capital ◽

Content Analysis ◽

English Language ◽

Global Scale ◽

Current Data ◽

Relational Capital ◽

Content Type ◽

Structural Capital ◽

Management Responsibility ◽

Data Source

Purpose – The purpose of this paper is twofold: first, to identify motivations that drive communication of IC (CIC); and second, to investigate content and format used in CIC from three perspectives, namely, human capital information, relational capital information and structural capital information. Design/methodology/approach – A global survey was conducted with 200 banks’ senior executives responsible for annual report (AR), followed by content analysis of each bank’s AR. Findings – The study found four motivations of CIC, namely, management responsibility to stakeholders, collective behavior, corporate responsibility and compliance. Content analysis of banks’ AR found structural capital information most prevalent, followed by human capital and relational capital. Five types of formats were analyzed to show the different presentation used in the CIC. Research limitations/implications – Current data source was limited to banking and focussed on English language publications. Practical implications – The study provides regulators insights to forces that either compel or hinder CIC, and updates literature on management’s thinking and priorities in CIC. Originality/value – This study is possibly the first paper that investigates the motivation of CIC for reporting, where IC is an important asset to organizations. The findings on the content and format used in CIC extend existing studies to a wider, global scale.

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A global scale geospatially located landslide dam dataset

10.5194/egusphere-egu2020-5881 ◽

2020 ◽

Author(s):

Hang Wu ◽

Mark Trigg ◽

William Murphy

Keyword(s):

Spatial Distribution ◽

Spatial Information ◽

Hot Spot ◽

Landslide Dam ◽

Volcanic Eruptions ◽

Data Access ◽

Global Scale ◽

Mountainous Areas ◽

Characteristic Analysis ◽

Landslide Dams

Landslide dams are a common hazard reported in mountainous areas around the world, where the dams block the normal flow of the river and can cause catastrophic flooding downstream when the temporary dam subsequently fails. Most of the research that couples landslide dams and fluvial systems have been concentrated on a site-specific scale and thus little is known about where these hazards are clustered and how they connect to climate and geology. A detailed and comprehensive dataset of landslide dams is not currently available at the global scale, since most global landslide dam datasets contain very little precise spatial information, which makes it harder to explore and to analyze the impacts on floods by modelling over larger scales.&#160;To narrow this data gap, we are developing a new global landslide dam dataset, recording: spatial coordinates, time information, dam materials, geomorphic characteristics of catchments, landslides, landslide dams and impounded lakes, and hydrographic characteristics of subsequent flood events and their consequent damage. This has been collated from bibliographic works in a number of languages. In the process of building the database we have encountered several obstacles including language barriers, indistinct naming standards, vague and patchy spatial information, and the diversity of data access in different countries. So far, we have data from over 700 individual events that have been synthesized into the same data format with consistent units and spatial references.The spatial distribution of landslide dam shows hazard hot spot areas concentrated around mountainous areas. The number of landslide dams reported increases exponentially during the past 1000 years, with the highest peak in the last 20 years. This increase is most likely due to better records in more recent years. Some extreme large-scale events, including earthquakes, floods, typhoons and volcanic eruptions have contributed to other peaks in the record. Initial analysis of the data will be used to explore distribution differences of dimension data, such as height, length and volume, of landslide dams that are induced by different triggers, to explore the triggers effect on landslide dam formation.The summary information of the dataset and the characteristic analysis result will be presented with a comparison to existing landslide dam datasets. A spatial distribution map of landslide dams and hazard hot spot areas will also be presented. This extensive global landslide dam dataset will allow researchers to understand the spatial distribution, geomorphic characteristics of landslide dams, and the connections among the dimensions of landslide sources, landslide dams, impounded lakes and upstream catchments. We will continue to develop this current landslide dam dataset and welcome feedback and additional datasets to supplement the database. Upon completion, the dataset will be made open access for wider research purposes and collaborations.

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Landslide dam susceptibility in the Austrian Alps inferred from modelled landslides, potential valley damming and lake formation

10.5194/egusphere-egu2020-8040 ◽

2020 ◽

Author(s):

Anne-Laure Argentin ◽

Günther Prasicek ◽

Jörg Robl ◽

Daniel Hölbling ◽

Lorena Abad ◽

...

Keyword(s):

Landslide Susceptibility ◽

Landslide Dam ◽

Susceptibility Map ◽

Flow Solver ◽

Austrian Alps ◽

Natural Hazard Mitigation ◽

Landslide Dams ◽

Landslide Volume ◽

Susceptibility Maps ◽

Lake Formation

In mountain landscapes, landslides often block river courses. Although landslides are well-known threats, the risks imposed by landslide dams are sometimes neglected. The impeding of a river can lead to the submergence of parts of the upstream valley and a failure of the dam can flood downstream terrain in a catastrophic event.Our aim is two-fold: we are interested in creating a landslide dam susceptibility map relying on modelled landslides and resulting damming of valleys and formation of lakes, and in studying the relation between the occurrence of landslide dams and lithology.Landslide susceptibility maps are a common tool for natural hazard mitigation, but landslide dam susceptibility maps are rarely produced. Several simple indices (Blockage Index, Backstow Index) have been developed to predict the obstruction capacity and stability of landslides on a river from landslide and catchment characteristics (landslide volume, catchment area, dam height etc.). However, those methods were applied on observed landslides, and did not consider landslide susceptibility. Here, we created a first modelling-based landslide dam susceptibility map and compared it to the results provided by the indices.Although the relation between lithology and landsliding has been thoroughly studied, no connection with dam formation has been highlighted so far. Lithology has an impact on various characteristics of the landslide, including its volume, and also influences valley geometry. We investigated if some alpine lithological units are more prone to landslide dam formation than others.In our modelling approach we used a 10 m DEM of the Austrian Alps and stochastically triggered landslides based on slope thresholds. We then simulated the runout of the landslides using a fluid flow solver. For each landslide deposit we computed the maximum dammed volume by filling the landslide-dammed DEM, and compared those volumes to the lithology. We also tested the different theoretical geomorphological indices to predict the impounding of the river and compared them to the actual results provided by our method.

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Cognitive Disequilibrium and Service-Learning in Physical Education Teacher Education: Perceptions of Pre-Service Teachers in a Study Abroad Experience

Journal of Teaching in Physical Education ◽

10.1123/jtpe.2015-0006 ◽

2017 ◽

Vol 36 (1) ◽

pp. 70-82 ◽

Cited By ~ 5

Author(s):

Stefan Ward ◽

Heidi Henschel Pellett ◽

Mark I. Perez

Keyword(s):

Preservice Teachers ◽

Service Learning ◽

Study Abroad ◽

Physical Education Teacher Education ◽

Multiple Data ◽

Teachers Experiences ◽

Data Source ◽

Axial Coding ◽

Member Checks ◽

Cognitive Disequilibrium

Purpose:The purpose of this study was to explore preservice teachers’ experiences of cognitive disequilibrium (CD) theory during a service-learning project in a study abroad experience.Method:A case study with 8 participants was used. Data sources consisted of: Formal interviews, videos of planning, videos of teaching, videos of reflection sessions, and informal interviews. Data were analyzed utilizing open and axial coding (Corbin & Strauss, 2008). Trustworthiness strategies included: prolonged engagement, multiple data source triangulation, and member checks.Results:Results indicated four themes: “We made it our own thing”, “Summer camp for teachers”, “Struggle and disequilibrium”, and “By the end it was a transformation”.Discussion/Conclusions:CD was ultimately positive for these students. The positive resolution of CD catalyzed a transformative effect on their perceptions of their teaching. This was supported by positive peer interaction.

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Meaning Relationship of the Verb Hope and Wish in English

SIGEH ELT : Journal of Literature and Linguistics ◽

10.36269/sigeh.v1i1.357 ◽

2021 ◽

Vol 1 (1) ◽

pp. 46-63

Author(s):

Carla Maretha

Keyword(s):

Grammatical Form ◽

Data Source ◽

British National Corpus ◽

Relationship Of ◽

National Corpus

This research is qualitative which aims to describe grammatical form of wish and hope, to classify elements of wish and hope sentences, and to analyse meaning of both words based on meaning tendency of grammatical form and elements. This research uses British National Corpus as data source, then the data are presented informally. This research shows that hope and wish have the same 5 grammatical forms, but hope and wish cannot be used interchangeable for having different tendency. Hope and wish can be synonymous conceptually, but characteristically they cannot be (real-unreal, and desired-wanted).

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Knowledge as a Service Framework for Collaborative Data Management in Cloud Environments - Disaster Domain

Advances in Systems Analysis, Software Engineering, and High Performance Computing - Managing Big Data in Cloud Computing Environments ◽

10.4018/978-1-4666-9834-5.ch008 ◽

2016 ◽

pp. 183-209 ◽

Cited By ~ 1

Author(s):

Katarina Grolinger ◽

Emna Mezghani ◽

Miriam A. M. Capretz ◽

Ernesto Exposito

Keyword(s):

Data Management ◽

Service Oriented Architecture ◽

Global Scale ◽

Heterogeneous Data ◽

Information Gathering ◽

Current Data ◽

Cloud Data ◽

Related Data ◽

Disaster Data ◽

Service Oriented

Decision-making in disaster management requires information gathering, sharing, and integration by means of collaboration on a global scale and across governments, industries, and communities. Large volume of heterogeneous data is available; however, current data management solutions offer few or no integration capabilities and limited potential for collaboration. Moreover, recent advances in NoSQL, cloud computing, and Big Data open the door for new solutions in disaster data management. This chapter presents a Knowledge as a Service (KaaS) framework for disaster cloud data management (Disaster-CDM), with the objectives of facilitating information gathering and sharing; storing large amounts of disaster-related data; and facilitating search and supporting interoperability and integration. In the Disaster-CDM approach NoSQL data stores provide storage reliability and scalability while service-oriented architecture achieves flexibility and extensibility. The contribution of Disaster-CDM is demonstrated by integration capabilities, on examples of full-text search and querying services.

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The Integration of Photodiode and Camera for Visible Light Positioning by Using Fixed-Lag Ensemble Kalman Smoother

Remote Sensing ◽

10.3390/rs11111387 ◽

2019 ◽

Vol 11 (11) ◽

pp. 1387

Author(s):

Yuan Zhuang ◽

Qin Wang ◽

You Li ◽

Zhouzheng Gao ◽

Bingpeng Zhou ◽

...

Keyword(s):

Visible Light ◽

Real Time ◽

Estimation Error ◽

Navigation Systems ◽

Stochastic Sampling ◽

Kalman Smoother ◽

Multiple Data ◽

Data Source ◽

3D Positioning ◽

Single Data

Visible Light Positioning (VLP) has become one of the most popular positioning and navigation systems in this decade. Filter-based VLP systems can provide real-time solutions but have limited accuracy. On the contrary, fixed-interval smoothers can help VLP achieve higher accuracy but require post-processing. In this article, a trade-off solution, Fixed-Lag Ensemble Kalman Smoother (FLEnKS), is proposed for VLP to achieve a semi-real-time and accurate positioning solution. The forward part of the FLEnKS is based on the Ensemble Kalman Filter (EnKF), which uses stochastic sampling with ensemble members and enables a better reflection of the features of nonlinear systems. The backward filter in the FLEnKS compensates for the estimation error from the forward filter using the linearization based on error states and further reduces the estimation error. Furthermore, multiple data from both photodiode (PD) and camera are fused in the proposed FLEnKS for VLP, which further improves the accuracy of conventional VLP with a single data source. Preliminary field test results show that the proposed FLEnKS provides a semi-real-time positioning solution with the average 3D positioning accuracy of 15.63 cm in dynamic tests.

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Association Between Brain-Derived Neurotrophic Factor Val66Met Polymorphism and Methamphetamine Use Disorder: A Meta-Analysis

Frontiers in Psychiatry ◽

10.3389/fpsyt.2020.585852 ◽

2020 ◽

Vol 11 ◽

Author(s):

Li He ◽

Yanhui Liao ◽

Qiuxia Wu ◽

Tieqiao Liu

Keyword(s):

Neurotrophic Factor ◽

Meta Analysis ◽

Brain Derived Neurotrophic Factor ◽

Current Data ◽

Cochrane Library ◽

Case Control Studies ◽

Val66met Polymorphism ◽

Asian Populations ◽

Bdnf Val66met Polymorphism ◽

Relationship Of

Background: Several studies had examined the association between brain-derived neurotrophic factor (BDNF) Val66Met polymorphism and methamphetamine (METH) use disorder, whereas the results were conflicting. The aim of this study was to conduct a meta-analysis to achieve a pooled effect size of the association between BDNF Val66Met polymorphism and METH use disorder.Methods: Literature searches were conducted in PubMed, EMBASE, and Cochrane Library up to July, 2020. All relevant studies on the relationship of BDNF Val66Met polymorphism and METH addiction were retrieved. Pooled odds ratios (ORs) with 95% confidence intervals (95% CIs) were calculated in the dominant, recessive, co-dominant, and allele model to appraise the association.Results: Seven case–control studies with a total of 2,204 subjects (956 METH-dependent cases and 1,248 healthy controls) were included in this meta-analysis. The results showed a significant correlation between BDNF Val66Met polymorphism and METH dependence in overall population under different genetic models. However, subgroup analysis indicated that the association only existed in Han Chinese but not in other Asian populations.Conclusion: Although the current data indicate that BDNF Val66Met polymorphism might be a potential genetic factor for METH use disorder, more researches are needed to prove its role in different populations.

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Recent research on landslide dams - a literature review with special attention to New Zealand

Progress in Physical Geography Earth and Environment ◽

10.1191/0309133302pp333ra ◽

2002 ◽

Vol 26 (2) ◽

pp. 206-235 ◽

Cited By ~ 133

Author(s):

Oliver Korup

Keyword(s):

New Zealand ◽

Management Strategies ◽

Temporal Distribution ◽

Landslide Dam ◽

Distribution Patterns ◽

Future Research ◽

Case Examples ◽

Mountainous Regions ◽

Landslide Dams ◽

Spatio Temporal

More than a decade has passed since the publication of the benchmark paper of Costa and Schuster (Costa, J.E. and Schuster, R.L. 1988: The formation and failure of natural dams. Geological Society of America Bulletin 100, 1054-68) on the formation and failure of natural dams. This review takes a critical look at recent trends and developments in international and New Zealand-based research on landslide dams. Temporary or permanent stream blockages by mass movements commonly occur in steep terrain, and gradually receive more attention and awareness with increasing population and land use pressure in upland regions. Different approaches in methodology and their relevance and application potential for engineering and mitigative measures are reviewed and several shortcomings outlined, with a view towards possible future research directions. A high percentage of previous work on landslide dams has been mainly descriptive in character, and has produced a multitude of documented case studies. Recent attempts to redress the balance have included the establishment of global and nationwide databases (inventories) of landslide dams, progress in predictive, quantitative and GIS-based modelling. Furthermore, interpretative approaches towards the reconstruction of former stream blockages and their spatio-temporal distribution patterns have been pursued, which may assist assessments of present and future geomorphic hazards. Both such appraisals as well as management strategies in mountainous regions in general, will have to rely on key data efficiently extracted from a plethora of case examples. Further work includes consideration of temporal and permanent landslide-triggered stream impoundments within Quaternary landscape evolution, quantification of sediment budgets and palaeoenvironmental reconstruction. Overall, there is still a considerable lack of understanding of geomorphic forms and processes involved with landslide-dam formation, stability and failure, part of which is inherent in the often ephemeral nature of stream blockages in coupled hillslope-valley systems.

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