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Article
Publication date: 7 August 2017

Osama A.B. Hassan

The aim of this review study is to present useful and practical expressions to compute the design vertical actions on load-bearing columns/walls of typical building…

Abstract

Purpose

The aim of this review study is to present useful and practical expressions to compute the design vertical actions on load-bearing columns/walls of typical building structures on the basis of EN 1991: Eurocode 1.

Design/methodology/approach

It is derived by a typical case in which wind actions, snow actions and permanents actions are loading a roof construction. The results are finally used to calculate the loading on columns/walls. Both ultimate limit state and serviceability limit state are considered.

Findings

From an instructive point of view, the advantage of this method is that it is simplified, general, not time-consuming, and it can be standardised to typical building structures.

Research limitations/implications

A number of example applications are introduced to illustrate the calculation procedure.

Practical implications

From an educational point of view, this problem is of interest to civil engineering students because the reviewed method is not cumbersome or time-consuming.

Social implications

From an engineering educational point of view, this problem is of interest to civil engineering students because the reviewed method is not cumbersome or time-consuming.

Originality/value

New formulated expressions to calculate the loadings on structural membranes based on Eurocode are presented.

Details

Journal of Engineering, Design and Technology, vol. 15 no. 4
Type: Research Article
ISSN: 1726-0531

Keywords

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Article
Publication date: 15 May 2018

Osama A.B. Hassan and Christopher Johansson

This paper aims to compare glued laminated timber and steel beams with respect to structural design, manufacturing and assembly costs and the amount of greenhouse gas emissions.

Abstract

Purpose

This paper aims to compare glued laminated timber and steel beams with respect to structural design, manufacturing and assembly costs and the amount of greenhouse gas emissions.

Design/methodology/approach

This paper presents structural design requirements in conformance with EN 1993: Eurocode 5 and Eurocode 3. With the help of these standards, expressions are derived to evaluate the design criteria of the beams. Based on the results of life-cycle analysis, the economic properties and environmental impact of the two types of beam are investigated. In this paper, the effect of beam span on the design values, costs and carbon dioxide emissions is analysed when investigating aspects of the structural design, economy and environmental impact. Different cross-sections are chosen for this purpose.

Findings

The study shows that the glued laminated (abbreviated as “glulam”) beams have a smaller tendency to lateral torsional buckling than the steel beams, and that they can be cheaper. From an environmental point of view, glulam beams are the more environmentally friendly option of the two beam materials. Furthermore, glulam beams may have a direct positive effect on the environment, considering the carbon storage capacity of the wood. The disadvantage of glued wood is that larger dimensions are sometimes required.

Research limitations/implications

Wind load and the effect of second-order effects have not been considered when analysing the static design. Only straight beams have been studied. Furthermore, the dynamic design of the beams has not been investigated, and the bearing pressure capacity of the supports has not been analyzed. We have investigated timber beams with a rectangular cross-section, and steel beams of rolled I-sections, known as “HEA profiles”. The cost analysis is based mainly on the manufacturing and assembly costs prevalent on the Swedish market. The only environmental impact investigated has been the emission of greenhouse gases. The design calculations are based on the European standards Eurocode 5 and Eurocode 3.

Practical implications

To achieve sustainability in construction engineering, it is important to study the environmental and economic consequences of the building elements. By combining these two effects with the technical design of buildings made of steel and/or timber, the concept of sustainable development can be achieved in the long run.

Social implications

The study concerns sustainability of building structures, which is an important of the sustainable development of the society.

Originality/value

The paper contains new information and will be useful to researchers and civil engineers.

Details

Journal of Engineering, Design and Technology, vol. 16 no. 3
Type: Research Article
ISSN: 1726-0531

Keywords

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Article
Publication date: 3 October 2016

Osama A.B. Hassan

The purpose of this paper is to advance a model that relates the criteria of sustainable development with the construction engineering of buildings. Moreover, a method to…

Abstract

Purpose

The purpose of this paper is to advance a model that relates the criteria of sustainable development with the construction engineering of buildings. Moreover, a method to evaluate the building sustainability is suggested.

Design/methodology/approach

The method is based on calculating the weighted expected utility function of a building with respect to composite indicator.

Findings

Based on this integrated approach, a tentative index to evaluate the sustainability of buildings is proposed.

Research limitations/implications

The study is limited to the assessment of the sustainable development of the built environment.

Practical implications

The feasibility of assessing the sustainability of a building using the sustainable index of buildings (SIB) is that it permits the decision-makers to study the potential improvement in the sustainable development of buildings in the long and short run. Moreover, the role of benchmarking in improving the sustainability performance of buildings is discussed in view of the suggested method.

Social implications

The present method is practical and easy to use for ranking building (or a part of a building) according to the sustainable performance.

Originality/value

New methodology based on integrating the value-focused thinking together with the composite indicators is used to evaluate the sustainable development.

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Article
Publication date: 3 April 2017

Osama A.B. Hassan and Rasmus Anderstedt

The purpose of this study is to attempt to compare experimental results for a number of models for the prediction of the drying time of new concrete floors. The…

Abstract

Purpose

The purpose of this study is to attempt to compare experimental results for a number of models for the prediction of the drying time of new concrete floors. The investigated methods are the table method, the Swedish Concrete Association (SCA) method and the free computer programme TorkaS 3.2.

Design/methodology/approach

The comparison is based on moisture measurements of four different floor specimens. The specimens have different ratios (w/c = 0.38, 0.6 and 0.7).

Findings

The results show that there is a good agreement between the table method and the measured values on the specimens with high water-cement ratio (w/c = 0.6 and 0.7). However, the deviation becomes greater at lower water-cement ratio (w/c 0.38). TorkaS also resulted in a good agreement with the measurements. However, it is noted that as the drying time increases, the programme exhibits a slow dehydration trend at higher w/c ratios. The SCA method shows various results within the permissible deviation. Moreover, the moisture distribution in concrete with high w/c ratios is found to be mainly influenced by moisture diffusion and little by self-desiccation.

Research limitations/implications

This study is limited to concrete slabs that are drying from one side in an enclosed building with an heating, ventilation and air conditioning (HVAC) system operating normally. Moreover, this study concerns concrete without special additives (e.g. silica fumes), which can be used in some specific cases to accelerate or retard the hydration (cure) process.

Practical implications

These compared methods are used widely in Sweden; therefore, it will be interesting to understand their applicability range. Another focus in this paper is to investigate how the effect of self-desiccation of concrete is related to the w/c ratios, taking into consideration the result of these prediction models.

Social implications

The paper can suit academic researchers, as well as the commercial industries, in a sense that the comparative study will pave a way to the best method to be used for drying time estimation.

Originality/value

The paper contains new information and could be useful to researchers and commercial industries.

Details

Journal of Engineering, Design and Technology, vol. 15 no. 2
Type: Research Article
ISSN: 1726-0531

Keywords

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Article
Publication date: 4 July 2016

Osama A.B. Hassan

This paper aims to understand the effect of different foundation designs of passive house on the resultant thermal bridges, at the junction between a wall and a slab on grade.

Abstract

Purpose

This paper aims to understand the effect of different foundation designs of passive house on the resultant thermal bridges, at the junction between a wall and a slab on grade.

Design/methodology/approach

The linear thermal transmittances of some newly developed foundations of passive house are determined. The investigated foundation designs are L-element, U-element and foundation with foam glass technique.

Findings

It is found that the special design of passive house foundation can considerably influence the heat flow through thermal bridges. In this context, it is proposed a new foundation design of passive house, which has relatively low heat loss through thermal bridges. The results are compared with the “default” ISO values used to evaluate the effect of thermal bridges in typical buildings. It is found that there is large difference between the calculated linear thermal transmittances at the investigated foundations of passive house as compared to typical buildings.

Practical implications

The results can hopefully be used to improve the energy efficiency of the passive house.

Social implications

Sustainable solution of buildings.

Originality/value

A new foundation design of passive house is suggested to reduce heat loss through thermal bridges.

Details

Journal of Engineering, Design and Technology, vol. 14 no. 3
Type: Research Article
ISSN: 1726-0531

Keywords

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Article
Publication date: 2 September 2014

Osama A.B. Hassan

The purpose of this paper is to investigate the role of peer learning and formative assessment as two creative learning methods in engineering learning environments. The…

Abstract

Purpose

The purpose of this paper is to investigate the role of peer learning and formative assessment as two creative learning methods in engineering learning environments. The results show that both models have yielded promising results with regard to meeting the criteria for the expected learning outcomes of the curriculum. However, the integrated model has resulted in better results than the model of formative assessment. The paper discusses also some practical and theoretical aspects related to the learning models.

Design/methodology/approach

It is advanced two general learning models; in the first model, the formative assessment is integrated with peer learning and in the second one, the formative assessment is solely used to enhance the learning. A field case study is conducted to investigate the effect of using the learning models on the expected learning outcomes of the students in an engineering course.

Findings

The results show that both learning models have yielded promising results with regard to meeting the criteria for the expected learning outcomes of the curriculum. However, the integrated model has resulted in better results than the model of formative assessment.

Research limitations/implications

The two models can be applied for the engineering course that has both practical and theoretical aspects. It is expected that areas of expertize in engineering education can be developed very well with the models.

Practical implications

The results show that the two learning models have yielded promising results with regard to meeting the criteria for the expected learning outcomes of the curriculum and that formative assessment link to good learning practice does indeed give improved learning.

Social implications

Increase the effectiveness of learning in engineering education.

Originality/value

Case study based on observation and planning.

Details

Journal of Applied Research in Higher Education, vol. 6 no. 2
Type: Research Article
ISSN: 2050-7003

Keywords

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Article
Publication date: 4 July 2016

Staffan Schedin and Osama A.B. Hassan

The purpose of this paper is to develop a practical model of work integrated learning for undergraduate engineering students in relation to…

Abstract

Purpose

The purpose of this paper is to develop a practical model of work integrated learning for undergraduate engineering students in relation to Conceiving-Designing-Implementing-Operating standards 7 (Integrated Learning Experiences) and 8 (Active Learning). Moreover, it is discussed the role of cultural-social perspective and peer learning in enhancing the developed learning model from a pedagogical point of view.

Design/methodology/approach

The model is based on an organized collaboration with the industrial partners in the surrounding geographic region. As a part of the collaboration, each participating student is guaranteed internships at a chosen company over the summer period. In the model, company-based projects are integrated with some of the study program courses. Moreover, the participating students are given a possibility to perform their final thesis at the chosen company.

Findings

A number of positive effects have been observed and documented as follows: first, the integrated learning improves the learning process for the students, where learning, knowledge and practice are integrated into the engineering curricula; second, the general quality of the study programs in the faculty has been developed and improved based on the professional skills as required by modern industrial companies; and third, the obtained advantage for the industrial partners has been to establish professional contacts with the students as well as the possibility to be acquainted with potential future employees.

Research limitations/implications

The feedback the authors received so far from the industrial partners has been positive. A detailed evaluation will be made at a later stage when more information is available.

Practical implications

The developed learning model supports the expected learning outcomes, especially with regard to interpersonal skills, teamwork and communication. As a part of the collaboration, each participating student is guaranteed internships at a chosen company over the summer periods. The authors consider this collaboration as a “win-win situation” for the three parties involved in the learning model: the students, the university/faculty and the industrial partners.

Originality/value

Case study based on observations and evaluation of a developed learning model.

Details

Journal of Applied Research in Higher Education, vol. 8 no. 3
Type: Research Article
ISSN: 2050-7003

Keywords

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Book part
Publication date: 10 April 2007

Sherene H. Razack

I discuss the case of Hassan Almrei, one of the five Arab men detained as suspects who have the potential to engage in terrorism. Hassan Almrei's detention arises out of a

Abstract

I discuss the case of Hassan Almrei, one of the five Arab men detained as suspects who have the potential to engage in terrorism. Hassan Almrei's detention arises out of a section of the Immigration and Refugee Protection Act of Canada that authorizes security certificates. A security certificate permits the detention and expulsion of non-citizens who are considered to be a threat to national security. Detainees have no opportunity to be heard before a certificate is issued and a designated judge of the Federal Court reviews most of the government's case against the detainee in a secret hearing at which neither the detainee nor his counsel is present. The detainee receives only a summary of the evidence against him. I discuss this legal situation as a state of exception that is part of a legal structure in which non-citizens have fewer rights than do citizens. Two conceptual tools shape my understanding of security certificates and their use in the “war on terror”: race thinking and the state of exception. The five detainees are more than simply victims of racial profiling. Their Arab origins, and the life history that mostly Arab Muslim men have had, operate to mark them as individuals likely to commit terrorist acts, people whose propensity for violence is indicated by their origins. When race thinking, the belief in the division of humanity into those prone to violence and those who are not according to racial descent, is accompanied by the idea that there must be two different, hierarchical legal regimes for each, and when we begin to grow accustomed to places without law and to people to whom the rule of law does not apply, we enter the terrifying world of the colonies and the concentration camp. This article examines how a space where law is suspended operates in the “war on terror” and it attends to the work that ideas about race do in the environment of the exception.

Details

Studies in Law, Politics and Society
Type: Book
ISBN: 978-0-7623-1324-2

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Article
Publication date: 3 July 2017

Osama A.G. Wahba, Ali M. Hassan, Abdelrahman M. Naser and Adel M.G. Hanafi

The purpose of this study to investigate the synthesis of new Cr(III), Fe(III), Ni(II) and Cu(II) Schiff base complexes by a simple technique (microwave technique). The…

Abstract

Purpose

The purpose of this study to investigate the synthesis of new Cr(III), Fe(III), Ni(II) and Cu(II) Schiff base complexes by a simple technique (microwave technique). The evaluation of the prepared complexes as pigments as corrosion resistant was also explored.

Design/methodology/approach

The Schiff base complexes were prepared by using microwave method (green chemistry), and then, the physico-chemical requirements according to standards for the synthesised pigments were investigate.

Findings

The prepared complexes exhibit good physical, mechanical and corrosion properties as pigments in paint formulations.

Research limitations/implications

The simple technique used for synthesis of metal complex pigments will significantly increase the cost saving for the manufacturing of such pigments category. Also, the used technique is considered a green method (eco-friendly), as there no organic solvent was used.

Practical implications

The evaluation of the prepared complex pigments as corrosion resistants was also studied.

Originality/value

It is a simple technique, green synthesis (no solvent used) is involved and high yield is obtained.

Details

Pigment & Resin Technology, vol. 46 no. 4
Type: Research Article
ISSN: 0369-9420

Keywords

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Book part
Publication date: 3 March 2016

Dina Al Raffie and Matthias P. Huehn

The chapter tries to highlight the critical importance of values to leadership, and argues that the research design of the ‘social scientific’ mainstream is…

Abstract

The chapter tries to highlight the critical importance of values to leadership, and argues that the research design of the ‘social scientific’ mainstream is incommensurable with the language of the scientific discipline that studies values: moral philosophy. The chapter shows that (a) through goals and actions, ethics is a central aspect of leadership and (b) that ethics cannot be reinterpreted as being ‘value-neutral’. Therefore, ‘effective’ leadership must always be connected to a specific value set. After arguing that leadership cannot be meaningfully looked at without reference to virtue ethics, two case studies are used to demonstrate the relationship between the two. By looking at two prominent terrorist leaders, the chapter shows how values are at the heart of their visions and actions. There are at least two practical implications: the study of leadership, and leadership education, must be reconnected with moral philosophy. The chapter connects three hitherto unconnected topics: leadership, (virtue) ethics and terrorism, presenting new insights into especially leadership.

Details

Leadership Lessons from Compelling Contexts
Type: Book
ISBN: 978-1-78560-942-8

Keywords

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