Effects of mixture ingredients on extrudability of concrete in Contour Crafting

2018 ◽  
Vol 24 (4) ◽  
pp. 722-730 ◽  
Author(s):  
Babak Zareiyan ◽  
Behrokh Khoshnevis
Keyword(s):  
Experimental Investigation ◽  
Empirical Model ◽  
Design Methodology ◽  
Construction Process ◽  
Shape Stability ◽  
Content Type ◽  
Contour Crafting ◽  
Concrete Mixtures ◽  
Significant Factors

Purpose This paper aims to investigate the extrudability (flow-ability and shape-stability) of concrete mixtures by using contour crafting (CC) as an automated construction process. Design/methodology/approach Several experiments have been performed for flow-ability and shape-stability of concrete mixtures. Experimental results were compared to understand significant factors and their interactions. After developing the empirical model for flow-ability, the model was validated. Findings The experimental investigation of varied combination of concrete components developed a mixture within constrains of the CC nozzle and improved the quality of the extruded part. Originality/value Several experimental samples were fabricated using CC, and the derived empirical model was validated after more than 700 h of work.

Effects of mixture ingredients on interlayer adhesion of concrete in Contour Crafting

2018 ◽  
Vol 24 (3) ◽  
pp. 584-592 ◽  
Author(s):  
Babak Zareiyan ◽  
Behrokh Khoshnevis
Keyword(s):  
Empirical Model ◽  
Design Methodology ◽  
Large Scale ◽  
Three Dimensional ◽  
Content Type ◽  
Three Dimensional Printing ◽  
Contour Crafting ◽  
Model Condition ◽  
Dimensional Printing ◽  
Significant Factors

Purpose This paper aims to investigate the strength at interlayer of specimens fabricated using Contour Crafting (CC) to develop a concrete mixture for large-scale three-dimensional printing. Design/methodology/approach The collected data from several experiments were analyzed to understand significant factors and their interactions. After developing the empirical model, condition for maximum desirability was identified and the model was validated. Findings The experimental investigation of varied combination of concrete components introduced an empirical model which can predict the strength at interface. Moreover, an optimized mixture within constrains of the CC nozzle was developed and validated. Originality/value Several experimental samples were tested, and the derived empirical model was validated after more than 600 h of work.

Construction by Contour Crafting using sulfur concrete with planetary applications

2016 ◽  
Vol 22 (5) ◽  
pp. 848-856 ◽  
Author(s):  
Behrokh Khoshnevis ◽  
Xiao Yuan ◽  
Behnam Zahiri ◽  
Jing Zhang ◽  
Bin Xia
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Simulation Model ◽  
Design Methodology ◽  
Construction Material ◽  
Construction Process ◽  
Element Analysis ◽  
Content Type ◽  
Contour Crafting ◽  
Finite Element Analysis Simulation

Purpose This paper aims to report on the experiments with the Contour Crafting Automated Construction process using sulfur concrete as the choice of construction material. Design/methodology/approach Several experiments have been performed at centimeter and meter scales. A finite element analysis simulation model for the behavior of sulfur concrete-based structures has been developed. Experimental results were compared with the results of simulation. Findings Sulfur concrete has numerous terrestrial applications and is potentially an ideal construction material for planetary construction. Originality/value Experimental samples of sulfur concrete were fabricated using a novel mixer/extrusion system. The mechanism was proven to be durable and stable after more than 500 h of work.

Housing, health and social care – an introduction

2014 ◽  
Vol 22 (1) ◽  
pp. 4-9 ◽  
Author(s):  
Christopher Handy
Keyword(s):  
Design Methodology ◽  
Good Life ◽  
Social Care ◽  
Research Approach ◽  
Content Type ◽  
Health And Social Care ◽  
The Government ◽  
Proportionate Universalism ◽  
Significant Factors

Purpose – There are clear links between health, housing and social care. The homeless live much shorter lives as do those people living in poorer quality accommodation and areas of deprivation. Life expectancy and the quality of life in later years are both drastically affected by Marmot's (2010) social gradient, with people from poorer backgrounds often doing worse. A decent home is fundamental to a healthy and a good life. The paper aims to discuss these issues. Design/methodology/approach – The research approach reviewed existing articles, examples from the housing sector and analysis of a range of data from organisations including the NHS. Findings – Good housing helps to support better health but it is not the only answer – joined up working between agencies and Marmot's proposal of proportionate universalism are significant factors in finding solutions to this long-standing issue. Social implications – Costs to the government, health services and local authorities and other agencies could be reduced by wider thinking around the link between housing, health and other support. Originality/value – This paper focuses on the existing links between health, housing and social care.

Serious games: leverage for knowledge management

2014 ◽  
Vol 26 (3) ◽  
pp. 235-252 ◽  
Author(s):  
Caroline Bayart ◽  
Sandra Bertezene ◽  
David Vallat ◽  
Jacques Martin
Keyword(s):  
Higher Education ◽  
Knowledge Acquisition ◽  
Serious Games ◽  
Design Methodology ◽  
Management Competencies ◽  
Content Type ◽  
Exploratory Investigation ◽  
Practical Implications ◽  
Research Show ◽  
Significant Factors

Purpose – The purpose of this paper is to investigate if the use of “serious games” with students can improve their knowledge acquisition and their academic performance. Design/methodology/approach – The research is an exploratory investigation resorting to the use of a serious game to evaluate the evolution of the students’ competencies in project management, through questionnaires processed using a structural “learning model.” Findings – This research shows indeed that the use of “serious games” improves the knowledge acquisition and management competencies of the students with the evidencing of significant factors contributing to this improvement. Practical implications – The findings of this research show that serious games can be an effective tool to be used in teaching students particularly as traditional methods are less and less accepted by today's students. Originality/value – Although the use of games is not something new in education, it is still limited in teaching practices in higher education. This experiment can help lecturers and trainers to resort to them in their pedagogy and to conceive them according to variables that can enhance their effectiveness.

Qualitative generalising in accounting research: concepts and strategies

2016 ◽  
Vol 29 (6) ◽  
pp. 1100-1131 ◽  
Author(s):  
Lee D. Parker ◽  
Deryl Northcott
Keyword(s):  
Design Methodology ◽  
Research Literature ◽  
Key Factors ◽  
General Applicability ◽  
Information Systems Management ◽  
Content Type ◽  
Accounting Research ◽  
Research Findings ◽  
Quality Of Research

Purpose – The purpose of this paper is to identify and articulate concepts and approaches to qualitative generalisation that will offer qualitative accounting researchers avenues for enhancing and justifying the general applicability of their research findings and conclusions. Design/methodology/approach – The study and arguments draw from multidisciplinary approaches to this issue. The analysis and theorising is based on published qualitative research literatures from the fields of education, health sciences, sociology, information systems, management and marketing, as well as accounting. Findings – The paper develops two overarching generalisation concepts for application by qualitative accounting researchers. These are built upon a number of qualitative generalisation concepts that have emerged in the multidisciplinary literatures. It also articulates strategies for enhancing the generalisability of qualitative accounting research findings. Research limitations/implications – The paper provides qualitative accounting researchers with understandings, arguments and justifications for the generalisability of their research and the related potential for wider accounting and societal contributions. It also articulates the key factors that impact on the quality of research generalisation that qualitative researchers can offer. Originality/value – This paper presents the most comprehensively sourced and developed approach to the concepts, strategies and unique deliverables of qualitative generalising hitherto available in the accounting research literature.

scholarly journals Who guarantees the quality of the quality assurance agencies? The exploration of the establishment and growth of the Asia-Pacific Quality Register (APQR)

2017 ◽  
Vol 11 (2) ◽  
pp. 58-67 ◽  
Author(s):  
Jianxin Zhang ◽  
Jagannath Patil
Keyword(s):  
Higher Education ◽  
Quality Assurance ◽  
Design Methodology ◽  
Asia Pacific ◽  
Qualitative Assessment ◽  
Future Prospects ◽  
Asia Pacific Region ◽  
Content Type ◽  
Quality Register

Purpose After the “quantity era,” today higher education has entered into the “quality era” and as “the gate keepers of quality,” quality assurance agencies (QAAs) are playing more and more irreplaceable important roles and their social status are becoming more and more prominent. However, how to guarantee the quality of the QAAs? Who can review the QAAs? The purpose of this paper is based exploration of these questions. Design/methodology/approach Following the founding of the European Quality Assurance Register (EQAR) for Higher Education, the Asia Pacific Quality Register (APQR) became the second in the international quality assurance (QA) networks to implement QA register, in 2015 with initiative of Asia-Pacific Quality Network. Findings This paper first retrospects the history and process of APQR, and subsequently the implementation of APQR is described in detail from the two aspects of the criteria and the procedure, and at the end, the paper concludes with a summary of the three characteristics of this first formal implement of APQR: APQR is an international register open to all the QAAs; APQR emphasizes characteristics evaluation of diversity; and APQR highlights the combination of quantitative assessment and qualitative assessment. Originality/value Today on the international stage of QA, APQR has emerged as “the watchman of quality” in the Asia-Pacific region as counterpart of EQAR in Europe. How far away does such newly emerging form of guaranteeing the QAAs’ quality go forward, what is its future prospects and other concerning issues, are some of the question that need enthusiastic attention and contribution.

The prediction of the cyclic mechanical behavior of stainless steel 304L at room temperature

2021 ◽  
Vol ahead-of-print (ahead-of-print) ◽  
Author(s):  
Hala Messai ◽  
Salim Meziani ◽  
Athmane Fouathia
Keyword(s):  
Stainless Steel ◽  
Design Methodology ◽  
Room Temperature ◽  
Type Model ◽  
Good Prediction ◽  
304L Stainless Steel ◽  
Content Type ◽  
The Third ◽  
Chaboche Model

Purpose The purpose of this paper is to highlight the performance of the Chaboche model in relation to the database identification, tests with imposed deformations were conducted at room temperature on 304L stainless steel specimens. Design/methodology/approach The first two tests were performed in tension-compression between ±0.005 and ±0.01; in the third test, each cycle is composed of the combination of a compression tensile cycle between ±0.01 followed by a torsion cycle between ±0.01723 (non-proportional path), and the last, uniaxial ratcheting test with a mean stress between 250 MPa and −150 MPa. Several identifications of a Chaboche-type model were then performed by considering databases composed of one or more of the cited tests. On the basis of these identifications, the simulations of a large number of ratchet tests in particular were carried out. Findings The results present the effect of the optimized parameters on the prediction of the behavior of materials which is reported in the graphs, Optimizations 1 and 2 of first and second tests and Optimization 4 of the third test giving a good prediction of the increasing/decreasing pre-deformation amplitude. Originality/value The quality of the model's predictions strongly depends on the richness of the database used for the identification of the parameters.

Who is a “Senior”? Looking for a definition in the healthcare system

2021 ◽  
Vol ahead-of-print (ahead-of-print) ◽  
Author(s):  
Monica Consolandi
Keyword(s):  
Quality Of Life ◽  
Health Care ◽  
Healthcare System ◽  
Health Care System ◽  
Design Methodology ◽  
Social Role ◽  
Content Type ◽  
The Core ◽  
Starting Point

Purpose Seniors are nowadays at the core of important reflections to understand both how to ensure them a proper quality of life and better recognize their social role, providing them services and proper health care to value them as persons and resources. This paper aims to find a through definition about who is a senior, in the author’s opinion the starting point to help them flourishing. Design/methodology/approach As an example of definitions, an online dictionary and two geriatric text-books are quoted, highlighting qualities and rights referred to seniors especially in the delicate context of the health-care system. Findings The lack of a commonly shared perspective on this delicate kind of patient entails the difficulty to reach a coherent and satisfying definition about who a senior is. Originality/value The lack of a commonly shared definition leads to inevitable misunderstandings and could explain the arduousness of considering seniors in all their aspects. Further investigations are suggested.

Hedonic experiences at heritage attractions: the visitor’s perspective

2021 ◽  
Vol ahead-of-print (ahead-of-print) ◽  
Author(s):  
Ana Carolina Bender ◽  
Manuela Guerreiro ◽  
Bernardete Dias Sequeira ◽  
Júlio Mendes
Keyword(s):  
Design Methodology ◽  
Theory And Practice ◽  
Structured Interviews ◽  
Content Type ◽  
Heritage Sites ◽  
Exploratory Approach ◽  
Hedonic Experience ◽  
Using Data

Purpose The purpose of this study is to explore the hedonic experience and its formation at heritage attractions. Design/methodology/approach A qualitative and exploratory approach was applied, using data from 21 semi-structured interviews and three in-situ focus groups. Findings Findings highlight that senses, imagery and emotions are stimulated by the physical landscape and by triggers of memorable experiences. Research limitations/implications To further explore this topic, a broader range of heritage attractions and perspectives from the diverse stakeholders involved in the management and consumption of these sites is needed. Originality/value Given the scarcity of research dedicated to the hedonic experience at heritage sites, this study provides a contribution by exploring the visitor’s perspective and points out relevant insights. As the hedonic feelings of pleasure, comfort and related affective responses impact the quality of memorable experiences, relevant implications for theory and practice are discussed.

Commentary on “The experiences of older carers of people with learning disabilities: ‘I just carry on with it’”

2021 ◽  
Vol 26 (1) ◽  
pp. 58-62
Author(s):  
Jan Sunman
Keyword(s):  
Quality Of Life ◽  
Learning Disabilities ◽  
Lived Experiences ◽  
Design Methodology ◽  
Policy And Practice ◽  
Content Type ◽  
The Voice

Purpose The purpose of this paper is to provide a commentary on the article by Rachel Forrester-Jones on the experiences of older carers of people with learning disabilities. Design/methodology/approach The commentary reflects on the themes identified in the original article, comparing its findings to the lived experiences of those taking part in older carers’ projects in Oxfordshire, England. Findings Similar broad themes were identified in both samples. Given these findings, the extent to which matters have changed, since the Valuing People work on older carers is considered. Originality/value The paper discusses policy and practice implications to improve the quality of life of older carers and their families and explores how the voice of older carers can be strengthened to enable them to shape practice and policy.

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