Charts for the mining-induced deflection of buildings

2020 ◽  
Vol 57 (12) ◽  
pp. 2020-2026 ◽  
Author(s):  
Andrea Franza ◽  
Olivier Deck ◽  
Matthew J. DeJong

This study investigates the flexural deformations of buildings induced by mining-related subsidence. A two-stage solution (previously applied to the tunnelling problem) is used. Buildings are modelled as a beam founded on an elastic continuum that is subjected to ground subsidence. A tensionless soil–structure interface is employed. The effects of both building stiffness and self-weight on the building deflection are considered. The proposed formulation is compared with analytical solutions and empirical envelopes from previous research. A parametric study is conducted for both perfect soil–foundation bond and gap formation to relate deflection ratio modification factors and the limit radius of the greenfield settlement curve (associated with the gap formation) to relative structure–soil stiffness, building weight, foundation shape, and greenfield ground curvature (hogging or sagging) by means of dimensionless groups. Finally, a simple case study is used to demonstrate the proposed procedure. The given framework is more comprehensive than design charts provided by previous mining-related works and can be used for rapid preliminary risk assessment.

2002 ◽  
Vol 19 (4) ◽  
pp. 23-41
Author(s):  
Safoi Babana-Hampton

The essay examines the texts of the two women writers - Leila Abouzeid (from Morocco) and Nawal El Saadawi (from Egypt) - as offering two female perspectives within what is commonly referred to as "feminine" writing in the Arab Muslim world. My main interest is to explore the various discursive articulations of female identity that are challenged or foregrounded as a positive model. The essay points to the serious pitfalls of some feminist narratives in Arab-Muslim societies by dealing with a related problem: the author's setting up of convenient conceptual dichotomies, which account for the female experience, that reduce male-female relationships in the given social context to a fundamentally antagonistic one. Abouzeid's novel will be a case study of a more positive but also realistic and complex perspec­tive on female experience ...


Water ◽  
2020 ◽  
Vol 12 (1) ◽  
pp. 219 ◽  
Author(s):  
Antonio-Juan Collados-Lara ◽  
David Pulido-Velazquez ◽  
Rosa María Mateos ◽  
Pablo Ezquerro

In this work, we developed a new method to assess the impact of climate change (CC) scenarios on land subsidence related to groundwater level depletion in detrital aquifers. The main goal of this work was to propose a parsimonious approach that could be applied for any case study. We also evaluated the methodology in a case study, the Vega de Granada aquifer (southern Spain). Historical subsidence rates were estimated using remote sensing techniques (differential interferometric synthetic aperture radar, DInSAR). Local CC scenarios were generated by applying a bias correction approach. An equifeasible ensemble of the generated projections from different climatic models was also proposed. A simple water balance approach was applied to assess CC impacts on lumped global drawdowns due to future potential rainfall recharge and pumping. CC impacts were propagated to drawdowns within piezometers by applying the global delta change observed with the lumped assessment. Regression models were employed to estimate the impacts of these drawdowns in terms of land subsidence, as well as to analyze the influence of the fine-grained material in the aquifer. The results showed that a more linear behavior was observed for the cases with lower percentage of fine-grained material. The mean increase of the maximum subsidence rates in the considered wells for the future horizon (2016–2045) and the Representative Concentration Pathway (RCP) scenario 8.5 was 54%. The main advantage of the proposed method is its applicability in cases with limited information. It is also appropriate for the study of wide areas to identify potential hot spots where more exhaustive analyses should be performed. The method will allow sustainable adaptation strategies in vulnerable areas during drought-critical periods to be assessed.


Geoheritage ◽  
2021 ◽  
Vol 13 (2) ◽  
Author(s):  
M. Pásková ◽  
J. Zelenka ◽  
T. Ogasawara ◽  
B. Zavala ◽  
I. Astete

AbstractHolistic interpretation of Earth heritage is one of the most important tasks of UNESCO Global geoparks. The ABC (abiotic, biotic, and cultural interconnections) concept is a potential interpretive approach used in Earth heritage popularization through geotourism. Apart of the deeper understanding of this concept, this study explores the application of this concept in selected geoparks. The Colca and Volcanoes Andagua UNESCO Global Geopark (Peru) and Muroto UNESCO Global Geopark (Japan) served as a case study in the frame of this qualitative research conducted during the summer 2019. Results show that the ABC approach is nearly perfectly understood by both geoparks, however there are both internal and external factors which influence the extent and form of how this concept is applied in practice. Except for specific geographical settings, different stages of geopark product development, and different managerial approaches, they mainly include the level of scientific knowledge and general education in the given geopark, as well as level of knowledge management and networking with another UNESCO global geoparks. The more experienced Muroto Geopark interpretation exhibits a comparatively higher level of visible ABC application, while the Colca and Volcanoes Andagua Geopark can benefit in the future from the natural inclination and ability of the local people to integrate the cultural aspects into their Earth heritage interpretation.


2012 ◽  
Vol 2012 ◽  
pp. 1-11 ◽  
Author(s):  
Sindolfo Miranda Filho ◽  
Julio Melo ◽  
Luiz Eduardo Leite ◽  
Guido Lemos

Context-aware systems are able to monitor and automatically adapt their operation accordingly to the execution context in which they are introduced. Component-based software engineering (CBSE) focuses on the development and reuse of self-contained software assets in order to achieve better productivity and quality. In order to store and retrieve components, CBSE employs component repository systems to provide components to the system developers. This paper presents an active component repository that is able to receive the current configuration from the context-aware system and compute the components and the new architecture that better fit the given context. Since the repository has a wide knowledge of available components, it can better decide which configuration is more suitable to the running system. The repository applies Fuzzy logic algorithm to evaluate the adequacy level of the components and GRASP algorithm to mount the new system architecture. In order to verify the feasibility of our approach, we use a digital TV middleware case study to achieve experimental results.


2010 ◽  
Vol 26 (1) ◽  
pp. 111-129 ◽  
Author(s):  
Sivapalan Gajan ◽  
Prishati Raychowdhury ◽  
Tara C. Hutchinson ◽  
Bruce L. Kutter ◽  
Jonathan P. Stewart

Practical guidelines for characterization of soil-structure interaction (SSI) effects for shallow foundations are typically based on representing foundation-soil interaction in terms of viscoelastic impedance functions that describe stiffness and damping characteristics. Relatively advanced tools can describe nonlinear soil-foundation behavior, including temporary gap formation, foundation settlement and sliding, and hysteretic energy dissipation. We review two tools that describe such effects for shallow foundations and that are implemented in the computational platform OpenSees: a beam-on-nonlinear-Winkler foundation (BNWF) model and a contact interface model (CIM). We review input parameters and recommend parameter selection protocols. Model performance with the recommended protocols is evaluated through model-to-model comparisons for a hypothetical shear wall building resting on clay and model-data comparisons for several centrifuge test specimens on sand. The models describe generally consistent moment-rotation behavior, although shear-sliding and settlement behaviors deviate depending on the degree of foundation uplift. Pronounced uplift couples the moment and shear responses, often resulting in significant shear sliding and settlements. Such effects can be mitigated through the lateral connection of foundation elements with tie beams.


Author(s):  
Ilya V. Sergodeev ◽  

The article deals with the dynamics of the semantic complex of dominant units in poetic text. Units of poetic text are divided into constant and dominant ones. Constant units realize the function of the context formation. They have one clear meaning. Dominant units realize the function of semantization. They are poly-interpretative. The methodology of the work is based on the theory of intertextuality which is viewed from the position of structural, interpretative and lingua-cultural approaches. The brief typology and characteristics of intertextual relations are given: auto- (self-quotations, self-allusions), in- (quotations, allusions), para- (structural and compositional units of a text such as a title, an epigraph, etc.) and arch-textuality (genre imitation; referring to well-known artistic images or cultural phenomena). The paper presents the model of analysis of dominant units in poetic text. The analysis is carried out in five steps: fragmentation, contextual analysis, search and determination of intertextual relations between the analyzed unit and units of address texts, contextual analysis of address texts, synthesis of the obtained contextual meanings. The practical material under study is the poem Elegy by the Canadian poet L. Cohen. The unit of analysis is the personal pronoun he in the given poetic text. The paper establishes intertextual relations between Elegy and texts from Greek mythology, the Holy Bible, Christian culture, and other works by L. Cohen. The conducted analysis shows that intertextual relations between the studied units initiate exchange and superimposition of their context meanings. As a result, the studied unit can have several meanings (some of which are not present in dictionaries but unique for the given author) within the same context. In this way, the dynamics of the semantic complex of the studied units and poetic text is realized.


Author(s):  
Alexios Brailas ◽  
Stella-Maria Avani ◽  
Christina Gkini ◽  
Maria-Afroditi Deilogkou ◽  
Konstantinos Koskinas ◽  
...  

In this paper, we describe a case study of an undergraduate course on research methodology, in which lecture was reduced to a minimum and replaced with experiential learning activities. The course design was project-based and spiraled through four phases: a mini-lecture on a given research method, an “early practice” activity, and “reflection on practice” tutor-guided small group collaborations which led to deeper understanding of the given research method. This particular course design constitutes a paradigm shift in comparison to the predominant in Greek higher education didactic pedagogical model. How this paradigm shift was received and experienced by the participating students? In order to get rich insights into the lived experiences of the participants (N=15), we adopted a blended qualitative research approach: thematic analysis combined with students’ critical reflections on their experience, aiming to produce a thick description of our intervention. The course design and implementation positioned students and their tutors as knowledgeable actors able to contribute research insights through their transactions.


2021 ◽  
Vol 17 (2 (24)) ◽  
pp. 92-99
Author(s):  
Gaiane Muradian

Through research methodology of case study the present paper promotes the connection between Symbolic Interactionism and film theory, the symbolic film world and the audience’s emotions, intellect and behavior. My purpose of focusing on the modern theory of Symbolic Interactionism is justified by the notion that the mentioned theory provides an ideal concept to achieve the objective of shaping the perceptions of massive audiences into possible positive directions, creating shared positive symbols in the society and making people react to the given symbols accordingly via film media. The analysis of the film version (A Game of Thrones) of George R. R. Martin’s series of epic fantasy novel A Song Of Ice and Fire (1996-2019) discloses the firm connection between Symbolic Interactionism and film theory, between symbolic interaction and communicating morality to audiences.


Author(s):  
Ivo Dostál ◽  
Petr Anděl ◽  
Marek Havlíček ◽  
František Petrovič

The steadily increasing landscape fragmentation and the reduction of permeability for wildlife are among the most negative impacts of human activity on the environment. In terms of education, theseproblems appear to be rather demanding, withthe difficulty corresponding tosecondary school standards. Considering the multiple interdisciplinary connections, the entire process cannot be sufficiently understood without a relevant amount of preliminary knowledge. Such a corpus of information is acquired especially through biology/ecology, geographyand history classes, but links to other subjects can be found too. The paper presents didactic methods facilitating the actual presentation of the theme to pupils/students; in this context, the authors discuss the possibilities of integrating the given problems into applicable schoolsubjects andoutline the risks arising from the proposed modification and/ or expansion of the teaching procedures. Also the links to data and supporting methodological materials are included that will allow the teacher to obtain enough information on the topicsto comprehend all the aspects and complexities of the innovated classes. In the corresponding sections, the papercharacterizes individual topics to be combined with selected teaching methods, especially as regards worksheets, project-oriented education, anda case study relating to afield trip targeting one of the areas of high importance for wildlife migration in the Czech Republic.


2017 ◽  
Vol 7 (2) ◽  
pp. 340-348 ◽  
Author(s):  
M. Domini ◽  
G. Langergraber ◽  
L. Rondi ◽  
S. Sorlini ◽  
S. Maswaga

The Sanitation Safety Planning methodology is implemented within a cooperation project in Iringa, Tanzania. The study presents the methodology and its adaptation and use for the given context, in order to assess risks and to support stakeholders in improving the current sanitation system and validate the design of an improved one. First results of the application of the methodology, obtained in one of the four peri-urban wards of Iringa, demonstrated its efficacy and utility in prioritising risks and identifying cost-effective control measures. Risks were assessed by the use of a semi-quantitative approach, and a simplified risk assessment matrix was developed for the case study. A sensitivity analysis was carried out in order to evaluate criteria for prioritising control measures to be selected for the development of an achievable improvement plan.


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