Nicolas Renon, Pierre Montmitonnet and Patrick Laborde
Purpose – The aim of this work is to provide a global 3D finite element (FE) model devoted to the modelling of superficial soil ploughing in the large deformation range and for a…
Abstract
Purpose – The aim of this work is to provide a global 3D finite element (FE) model devoted to the modelling of superficial soil ploughing in the large deformation range and for a vast class of soil treatment tools. Design/methodology/approach – We introduced soil constitutive equation in a FE software initially designed for the metal forming. We performed the numerical integration of the non‐linear ploughing problem. Non‐linearities encountered by the problem can be summed up: as soil constitutive equation (idealized with non‐associated compressible plastic law), unilateral frictional contact conditions (with a rigid body), geometrical non‐linearities (the ploughing tool) and large deformation range. To handle such difficulties we performed several numerical methods as implicit temporal scheme, Newton‐Raphson, non‐symmetric iterative solver, as well as proper approximation on stress and strain measures. Findings – Main results deal with the validation of the integration of the non‐linear constitutive equation in the code and a parametric study of the ploughing process. The influence of tool geometric parameters on the soil deformation modes and on the force experienced on the tools had been point out. As well, the influence of soil characteristics as compressibility had been analyzed. Research limitations/implications – This research is devoted to perform a numerical model applicable for a large range of soil treatment tools and for a large class of soil. However, taking into account all kind of soil is utopist. So limitations met are essentially related to the limit of the accuracy of the elasto‐plastic idealization for the soil. Practical implications – In practice the numerical model exposed in the paper can clearly help to improve and optimize any process involving superficial soil submitted to the mechanical action of a rigid body. Originality/value – The original value of the paper is to provide a global and an applicable numerical model able to take into account the main topics related to the ploughing of superficial soils. Industrials in geotechnics, in agriculture or in military purposes can benefit in using such numerical model.
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This chapter focuses on diversity issues in France. It shows how these issues came historically in the French context and how the main tensions generated, notably the…
Abstract
This chapter focuses on diversity issues in France. It shows how these issues came historically in the French context and how the main tensions generated, notably the equality-diversity and universality-diversity tensions, are not understandable without a knowledge of the French Republicanism which gives to the foundations of the French social fabric its peculiarities.
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IN this number we make some commemoration of the twenty‐five years so happily achieved by the King‐Emperor. As our contributors show, the cardinal event of the whole of the Reign…
Abstract
IN this number we make some commemoration of the twenty‐five years so happily achieved by the King‐Emperor. As our contributors show, the cardinal event of the whole of the Reign, so far as libraries were concerned, was the passing of the Public Libraries Act of 1919. The generations change rapidly, and there are few to‐day who remember acutely the penury and struggle which were involved in the fact that all public library expenditure had to be kept within “the limit of the penny rate.” It is possibly true that the average community has taken no very intelligent advantage of the breaking of its financial fetters; in no town in the British Empire can it be said that there is anything approaching generosity, let alone extravagance, towards libraries. Even in the greatest cities, where they have built fine buildings and opened them with much ceremony, the rate allocation for their maintenance is not nearly of the scale that finds acceptance, or did find acceptance, in the United States. That is because we are young people in an old country. The tradition dies hard that education is a luxury and that libraries, which in the eyes of many are only remotely related to education, are an even greater luxury. We heard it said recently that many local authorities regarded the libraries as a sort of joke, and delighted to cut down their expenditure upon them. This lugubrious way of opening our remarks upon the Jubilee is only by way of pointing out that to‐day, at any rate, we have the power to go ahead if we convince our authorities that it is desirable to do so.
Kibrom Adino Abate, Tegegne Derbe Libshwork and Linger Ayele Mersha
The outbreak of covid-19 has affected international migration and remittance and has also narrowed down the opportunities for internal labor migrants. The pandemic has also left…
Abstract
Purpose
The outbreak of covid-19 has affected international migration and remittance and has also narrowed down the opportunities for internal labor migrants. The pandemic has also left internal migrants in a threatening situation due to the closure of job opportunities. Taking the migration of labor from the highland toward the sesame production belt into consideration, this study aims to examine the influencing factors of migration to the sesame belt amid covid-19 and ascertain the link between migration and translocal vulnerability.
Design/methodology/approach
The study followed a mixed approach that combines quantitative and qualitative methods. However, the quantitative approach tends to dominate due to the nature of the objectives of the study. The study was conducted in the central Gondar zone, using a cross-sectional survey design with a sample size of 150 households collected from January to March, 2021. Both descriptive and econometrics models such as binary logit model have been used.
Findings
Based on the study result, we came to understand that migration is part and parcel of the livelihoods of the farm household that accounts for 35% of migration status amid covid-19. Particularly, the study came to conclude that households’ decision to send family members heavily relied on their prior information and fear of transmission of the coronavirus to family members which are statistically significant. As a result, this piece of work can be a good witness for translocal vulnerability where studies are very limited in the area. For this, this study suggests that concerned bodies like social and labor affairs in consultation with the agriculture offices and bureaus at a different level and the investors in the migrant’s destination should facilitate the protection and awareness mechanisms so that the spread of covid-19 can be minimized and thereby both the migrants and the investors can be benefitted from the migrants’ work amid covid-19.
Originality/value
This study tries to connect the current spread of covid-19 with the translocal vulnerability context. Primarily, it empirically argued the translocal vulnerability factor is the main determinant for the farm households to send families’ labor as a livelihood diversification strategy. Very limited studies consider the translocal vulnerability implication of migration; notably to the best of the researchers’ knowledge, studies that linked covid-19 with translocal vulnerability context are scant. On top of that, many studies that link migration with covid-19 tend to be inclined to international migration with very limited attention to internal migration.
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Saad Zafir Alshehri, Jenny Byrne and Marcus Grace
The purpose of this paper is to investigate how and why Saudi Arabian students engage in specific health risk behaviours (HRBs), and if there are gender differences.
Abstract
Purpose
The purpose of this paper is to investigate how and why Saudi Arabian students engage in specific health risk behaviours (HRBs), and if there are gender differences.
Design/methodology/approach
In order to find out the situation regarding university students in Saudi Arabia, quantitative data were collected by administering questionnaires to 722 respondents, and qualitative data were collected using a series of interviews with 17 students.
Findings
The findings of this mixed methods sequential explanatory study suggest that lifestyle and personal factors, as well as economic, social, policy and other aspects of the environment played a significant role in influencing students’ HRBs. Recommendations for mitigating HRBs among these students and other youth in the Saudi Arabian context are provided.
Originality/value
This paper addresses an important gap in the research on HRBs among university students from the perspectives of students.
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Windi Winasti, Sylvia Elkhuizen, Leo Berrevoets, Godefridus van Merode and Hubert Berden
In hospitals, several patient flows compete for access to shared resources. Failure to manage these flows result in one or more disruptions within a hospital system. To ensure…
Abstract
Purpose
In hospitals, several patient flows compete for access to shared resources. Failure to manage these flows result in one or more disruptions within a hospital system. To ensure continuous care delivery, solving flow problems must not be limited to one unit, but should be extended to other departments – a prerequisite for solving flow problems in the entire hospital. Since most current studies focus solely on overcrowding in emergency units, additional insights are needed on system-wide patient flow management. The purpose of this paper is to look at the information available in system-wide patient flow management studies, which were also systematically evaluated to demonstrate which interventions improve inpatient flow.
Design/methodology/approach
The authors searched PubMed and Web of Science (Core Collection) literature databases and collected full-text articles using two selection and classification stages. Stage 1 was used to screen articles relating to patient flow management for inpatient settings with typical characteristics. Stage 2 was used to classify the articles selected in Stage 1 according to the interventions and their impact on patient flow within a hospital system.
Findings
In Stage 1, 107 studies were selected. Although a growing trend was observed, there were fewer studies on patient flow management in inpatient than studies in emergency settings. In Stage 2, 61 intervention studies were classified. The authors found that most interventions were about creating and adding supply resources. Since many hospital managers these days cannot easily add capacity owing to cost and resource constraints, using existing capacity efficiently is important – unfortunately not addressed in many studies. Furthermore, arrival variability was the factor most frequently mentioned as affecting flow. Of all interventions addressed in this review, the most prominent for advancing patient access to inpatient units was employing a specialized individual or team to maintain patient flow and bed placement across hospital units.
Originality/value
This study provides the first patient flow management systematic overview within an inpatient setting context.