| 1. |
- Allard, Ingrid, 1986-, et al.
(författare)
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Energy evaluation methods for residential buildings in Nordic countries
- 2012
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Ingår i: Proceeding of the Technoport Conference. - : Elsevier.
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Konferensbidrag (refereegranskat)abstract
- To meet the goals of the directive 2010/31/EU on the energy performance of buildings, the building sector in Europe now faces a transition towards more energy efficient buildings. Research and development of new energy solutions and technology will be necessary for the transition and the importance of measuring and evaluating building energy performance increases. This paper attempts to review and evaluate different methods that are commonly used to analyze energy performance in residential buildings in Nordic countries, primarily in Sweden, Norway and Finland. A short international review of regulations is also included. Some advantages and disadvantages of each method are discussed, as well as commonly used methods in the three countries. Although the three Nordic countries have similar climate conditions and building traditions, the study shows that there exist relatively large variations in defining parameters related to energy performance in residential buildings, such as energy use, heated area, and climate zones. The outcome of the regulations could be investigated by adapting the codes on a selected set of buildings. Common analyzing methods, or parts of methods, are found to be used in several countries. These aspects may be considered in further work to develop more accurate and easily comparable methods to evaluate energy performance for residential buildings in cold climate.
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| 2. |
- Grundberg, Staffan, 1961-, et al.
(författare)
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Dynamics of axially loaded and partially Interacting composite beams
- 2012
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Ingår i: ECCM15. - : ECCM15. - 9788888785332
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Konferensbidrag (refereegranskat)abstract
- The aim of this paper is to study the dynamics of partially interacting composite beams subjectedto axial loads, a situation occurring in e.g. beam-columns. The eigenfrequencies arederived for the simply supported composite beam subjected to an axial force. Measurements ofthe fundamental frequencies of a simply supported composite beam consisting of three layersare carried out considering different values of the applied axial force. The agreement betweenthe theoretical and experimental results is discussed. It is also shown that the application ofthe axial force introduces frictional moments at the boundaries, which make the experimentalboundary conditions deviate somewhat from those of an ideal simply supported beam.
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| 3. |
- Hassan, Osama. A.B. 1969-
(författare)
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Dyslexia and learning in view of the socio-cultural theory and development psychology
- 2023
-
Ingår i: Social Science & Humanities Open. - Amsterdam : Elsevier. - 2590-2911. ; 8:1, s. 100718-100718
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Tidskriftsartikel (refereegranskat)abstract
- This study attempts to apply the socio-cultural learning theory together with the developmental psychology theory to create a better insight into how learning and teaching methods can be made more efficient for university students who have reading and writing difficulties/dyslexia. Pedagogical and didactic methods are derived, based on the sociocultural perspective, Bronfenbrenner's ecological system theory and the author's observations as a teacher in the classroom to help minimize the problem of learning for students with dyslexia. Learning and the learning environment as dictated by these theories can enable the production of pedagogical and didactic methods to streamline the learning of students with dyslexia within the framework of university education.
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| 4. |
- Hassan, Osama A.B. 1969-
(författare)
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Effect of foundation designs of passive house on the thermal bridges at the ground
- 2016
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Ingår i: Journal of Engineering, Design and Technology. - : Emerald Group Publishing Limited. - 1726-0531 .- 1758-8901. ; 14:4, s. 602-613
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Tidskriftsartikel (refereegranskat)abstract
- In this paper it is attempted to study 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. The linear thermal transmittances of some newly developed foundations of passive house are determined. The compared foundation designs are L-element, U-element and foundation with foam glass technique. It is found that the special design of passive house foundation can considerably influence the heat flow through thermal bridges. The calculated linear thermaltransmittances of L-element, U- element and foundation with foam glass are 0.085 W/mK, 0.074 W/mK and 0.031 W/mK, respectively. In this context, it is proposed a new foundation design of passive house, which has relatively low heat loss through thermal bridges, calculated as 0.031 W/mK. 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 foundationsof passive house as compared to typical buildings.
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| 5. |
- Hassan, Osama A. B., 1969-
(författare)
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New Methods for Reducing Ground-Borne Noise in Buildings above Railway Tunnels
- 2003
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Doktorsavhandling (övrigt vetenskapligt/konstnärligt)abstract
- The rapid expansion of major cities in the west Europeancountries has accentuated the need to exploit every potentialsite for new establishments, e.g. areas over train tunnels andnear railway tracks in general. A significant impediment toexploit such areas is the structure-borne noise generated bythe train traffic, which is transmitted into buildings via theground. Reliable prediction methods and cost-effective noisecontrol measures are therefore needed and are also the objectof the present work. In this thesis, the studied buildings areconsidered as wave-guides for the sound transmitted from theground. The work is restricted to the case of hard ground suchas granite. The chosen technique permits comparison betweendifferent potential measures to reduce the transmission ofstructure-borne sound upward in buildings. It is shown that thedesign of the load-bearing structures is important in thiscontext, and a design with relocated columns has givenpromising results. It is also shown that the stiffness of theground plays an important role in the transmission process.This leads to the idea that a sand layer between the foundationof the building and the bedrock may reduce the transmission.New methods have thus been developed in the course of this workto evaluate the stiffness of the layer using approximate andexact techniques. Results are presented and a comparison ismade with previous results for a "normal" building and it isshown that the insertion of sand layer has a potential toconsiderably reduce the sound level in the building.Keywords:Ground-borne noise, railway noise, in-planewaves, wave-guides, scattering, propagation constant, inputmobility, elastic stratum, dual integral equations.
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| 6. |
- Hassan, Osama, 1969-, et al.
(författare)
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A comparative study between glulam and concrete columns in view of design, economy and environment
- 2022
-
Ingår i: Case Studies in Construction Materials. - Amsterdam, Netherlands : Elsevier. - 2214-5095. ; 16
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Tidskriftsartikel (refereegranskat)abstract
- In this paper, it is attempted to study possible sustainability solutions for building structures. In this context, comparisons are made between two load-bearing columns with different building materials – glued laminated timber and concrete – with regard to structural design, economic consequences and the emission of greenhouse gases. In terms of structural design, the results show that with small axial forces, glulam columns will result in smaller cross-sectional areas compared to concrete columns. However, at larger axial forces, concrete columns will result in smaller cross-sectional areas than glulam columns. An increased column length also means larger dimensions for glulam columns, but this does not always apply to concrete columns. With respect to environmental impact, it is shown that using glulam columns is the more environmentally friendly option. From an economic point of view, the cost estimates for glulam and concrete columns may vary depending on the country and the abundance of the construction material. In Sweden, a forest-rich country, it is shown that the costs for both column types are quite similar considering small axial loads. At higher axial loading, concrete is generally the cheaper alternative.
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| 7. |
- Hassan, Osama, 1969-
(författare)
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A Simplified Procedure to Determine the Deflection of Statically Indeterminate Structures
- 2014
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Ingår i: International Journal of Aerospace and Lightweight Structures. - Singapore : Research publishing. - 2010-4286 .- 2010-4294. ; 4:4, s. 241-253
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Tidskriftsartikel (refereegranskat)abstract
- In the study presented here, the problem of calculating deflection of stati-cally indeterminate continuous beams and structural frames is addressed. Theelastic line equation, taught in many standard courses in structural mechan-ics is used to determine the structure deflections.In the investigated method,the structure is divided into a simply supported members in which the elas-tic line equation is applied to calculate the deflection shape of the structure.The results are compared with the finite element method (FEM) and goodagreement is obtained. Moreover, the advantage of this method is that it issimplified, general, not time-consuming, and it can be standardised to thistype of structures.
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| 8. |
- Hassan, Osama, 1969-
(författare)
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A simplified structural analysis of statically indeterminate continuous thick beams
- 2016
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Ingår i: International Journal of Mechanical Engineering Education. - : Sage Publications. - 0306-4190 .- 2050-4586. ; 44:4, s. 257-271
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Tidskriftsartikel (refereegranskat)abstract
- In the study presented here, a simplified exact analytical solution of the problem of indeterminate continuous beams is derived and compared with the numerical solution, finite element. For the analytical method, the structure is divided into a simply supported element with internal support moments. The moments are first calculated with the help of boundary rotation conditions by taking into account both the shear andbending deformations. Second, the deflection functions of the beam members are derived. The results of a two-span continuous beam show that both methods yield an excellent agreement. The advantage of the presented method is that it is simplified, general, not time-consuming, and it can be standardized to this type of structures. Solution methods discussed in this paper can be of interest within the framework of mechanical and civil engineering education in which bending and shear of thick beamsare taught.
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| 9. |
- Hassan, Osama, 1969-
(författare)
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An integrated approach to assessing the sustainability of buildings
- 2016
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Ingår i: Journal of Engineering, Design and Technology. - London : Emerald Group Publishing Limited. - 1726-0531 .- 1758-8901. ; 14:3, s. 835-850
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Tidskriftsartikel (refereegranskat)abstract
- The sustainability of the built environment is increasingly becoming an urgent issue for modern society. In this context, assessing the sustainable development of buildings will be an effective tool in managing and monitoring the progress of the sustainability performance on a local and/or global scale. In this paper, there is an attempt to integrate two methods of assessing the sustainability of buildings. The first method applies the concept of composite indicators. The other method applies the weighted utility function, using the value-focused thinking approach of mathematically modelling and constructing composite indicators. A tentative index to evaluate the sustainability of buildings is proposed, based on this integrated approach. The suggested method can give the assessor the opportunity to analyse the potential improvement that can be carried out in order to improve the sustainable development of buildings in the long and short term. Finally, the role of benchmarking in improving the sustainability performance of buildings is discussed in relation to the suggested method.
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| 10. |
- Hassan, Osama, 1969-, et al.
(författare)
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Assessment of human-induced vibrations in composite timbre floors
- 2012
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Ingår i: Proceedings of the 15th European Conference on Composite Materials. - Italien. - 9788888785332
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Konferensbidrag (refereegranskat)abstract
- The authors investigate the human induced vibrations in typical composite timber floors inresidential buildings. Assessment methods given in different design codes and guidelines,such as the Eurocode, are discussed. A case study analysis based on the differentmethodologies is carried out to assess the acceptability of a specific timber floor. Twoextreme cases are considered: full and non-composite action. It is shown that compositeaction improves the floor acceptability for general residential applications. The limitations ofthe different criteria given in the codes and guidelines for assessing floor vibrations in timberfloor structures are discussed and, also, the possible improvement of these criteria.
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| 11. |
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| 12. |
- Hassan, Osama, 1969-, et al.
(författare)
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Cross-laminated timber flooring and concrete slab flooring : A comparativestudy of structural design, economic and environmental consequences
- 2019
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Ingår i: Journal of Building Engineering. - : Elsevier. - 2352-7102. ; 26, s. 1-16
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Forskningsöversikt (refereegranskat)abstract
- This paper compares cross-laminated timber (CLT) flooring and concrete slab flooring with respect to structural design, cost analysis, and greenhouse gas emissions. The effect of floor span on design values, costs, and carbondioxide emissions is analysed in terms of structural design, economy, and environmental impact. Different crosssections are chosen for this purpose. The study shows that CLT flooring has significantly lower emissions ofclimate-impact greenhouse gases, and its ability to store carbon is significantly greater than the capacity of concrete storage. From an economic point of view, the CLT material is more expensive than concrete. However, the estimated “ready-to-assemble” cost of both floor types is quite similar. The study shows that CLT flooring can compete with a concrete slab floor when it comes to a span as wide as 7m without violating the structural requirements. However, with an increase in span, it is more difficult to meet the requirements for vibration for aCLT floor than for a concrete slab. At shorter spans, the moment capacity is often a decisive factor for concrete slabs while deformation is the decisive factor for a CLT floor. For larger spans, resonance frequency and deformation are crucial for the CLT floor, while the long-term deformation of the concrete is the decisive factor in structural design.
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| 13. |
- Hassan, Osama, 1969-, et al.
(författare)
-
Dynamics of partially interacting composite beams
- 2012
-
Ingår i: Proceedings of the 15th European Conference on Composite Materials. - 9788888785332
-
Konferensbidrag (refereegranskat)abstract
- In this work, a combined variational calculus and experimental approach are used to characterize the structural vibration behaviour of layered composite beams. Experimental dynamic tests are carried out on a composite simply supported beam with varied interaction strength between the layers. From the results, the influence of connections on the flexural natural frequencies, flexural deformation and damping is investigated. A good agreement between the derived theoretical equations and experimental results is obtained.
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| 14. |
- Hassan, Osama, 1969-
(författare)
-
Dyslexi och lärande utifrån det sociokulturella perspektivet och utvecklingspsykologin
- 2023
-
Ingår i: Konferens i pedagogiskt arbete, 2023 -Book of abstracts. - Norrköping : Linköpings universitet. - 9789180752831 - 9789180752848
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Konferensbidrag (övrigt vetenskapligt/konstnärligt)abstract
- Högt ställda kunskapskrav på universitet och kunskapsmässig spridning i klasserna bidrar till att studenter med dyslexi får svårt att hinna med den ordinarie undervisningen varför en undervisning anpassad efter studenters olika behov och förutsättningar tycks vara av stor betydelse. Många högskolestudenter med dyslexi behöver därför mer och bättre pedagogiskt stöd under sina studier. Det finns gedigen forskning som handlar om hur att stimulerar lärande hos barn, och ungdomar med dyslexiproblem. Se till exempel Ekelund (2021), Cederquist (2021), Lithari (2019). Med hänsyn till universitetsstudenter, se t ex Donato m fl. (2022). Denna artikel syftar till att tillämpa dock lärandet utifrån utvecklingspsykologiteorin och den sociokulturella lärandeteorin för att skapa bättre insyn i hur lärandet kan effektiviseras hos högskolestudenter med läs- och skrivsvårigheter/dyslexi, baserad på författarens observationer som lärare i klassen. Varför väljas specifikt dessa två teorier, beror på området av intresse för dessa två teorier behandlar. Båda teorier fokuserar om samspelet mellan individ och miljö och detta tycks vara av stor betydelse för lärandeutveckling hos studenter som lider av dyslexi. Vidare är det praktiskt att tillämpa pedagogiska och didaktiska principer som dikterade av dessa teorier inom ramen för högskoleutbildning.
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| 15. |
- Hassan, Osama, 1969-
(författare)
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Dyslexi och lärande utifrån det sociokulturella perspektivet och utvecklingspsykologin
- 2023
-
Ingår i: Den 9:e utvecklingskonferensen för Sveriges ingenjörsutbildningar. - Västerås : Mälardalens universitet. - 9789174856200 ; , s. 65-77
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Konferensbidrag (övrigt vetenskapligt/konstnärligt)abstract
- Syftet med denna artikel är att tillämpa den sociokulturella lärandeteorin tillsammans med utvecklingspsykologiteorin för att skapa bättre insyn i hur lärandet kan effektiviseras hos universitetsstudenter med läs- och skrivsvårigheter/dyslexi. Med detta som bakgrund föreslås några pedagogiska och didaktiska strategier, baserade på författarens observationer som lärare i klassen samt studenters feedback.
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| 16. |
- Hassan, Osama, 1969-
(författare)
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Effect of wooden floorboards on the vibration of timber floor
- 2024
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Ingår i: Scientific Reports. - : Springer Nature. - 2045-2322. ; 14:1
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Tidskriftsartikel (övrigt vetenskapligt/konstnärligt)abstract
- This study is aimed at investigating those parameters related to timber fooring that can afect the acceptability of vibration behaviour of a timber foor in a residential building in view of the criteria stated in Eurocode EC5. The timber foor investigated is made of OSB/3 foorboards and timber joists. The parameters that are investigated in this study are thickness of fooring, foor joist span, joist spacing and connection of foorboards to the joists. In this context, two cases are considered. First: the fooring is nailed or screwed to the joists and no composite action or interaction is obtained between joists and foorboards. Second: the fooring is glued sufciently to the joists and full interaction is obtained. The result suggests that glued foorboards perform much better with respect to natural frequency, static defection and peak foor velocity than nailed or screwed foorboards. In almost all cases of glued foorboards, the result complies fully with the Eurocode 5 design vibration requirements. However, as foor lengths increase, the static defection will increase beyond the allowable limit, especially for relatively thin foor panels and relatively widely spread joists. For both cases, increasing foorboards thickness and decreasing the joist span by adding more beams can yield even better results to satisfy the requirement of vibration comfort.
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| 17. |
- Hassan, Osama, 1969-, et al.
(författare)
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Estimation of drying time of fresh concrete slabs: acomparative study
- 2017
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Ingår i: Journal of Engineering, Design and Technology. - : Emerald Group Publishing Limited. - 1726-0531 .- 1758-8901. ; 15:2, s. 134-148
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Tidskriftsartikel (refereegranskat)abstract
- Purpose – The purpose of this study is to attempt to compare experimental results for a number of modelsfor 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 differentfloor 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 slowdehydration 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 influencedby moisture diffusion and little by self-desiccation.Research limitations/implications – This study is limited to concrete slabs that are drying from oneside 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 beused 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 predictionmodels.Social implications – The paper can suit academic researchers, as well as the commercial industries, in asense 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.
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| 18. |
- Hassan, Osama, 1969-, et al.
(författare)
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Experimental Analysis of Composite Timbre-Concrete Wall Element
- 2012
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Ingår i: Proceedings of the 15th European conference on composite materials. - Venice. - 9788888785332
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Konferensbidrag (refereegranskat)abstract
- The authors present an experimental and theoretical study on a composite or hybrid element used in residential and agricultural buildings. The composite wall element consists of timber studs connected to a concrete plate by means of nail plate shear connectors. Experimental results are presented and compared with an analytical model for partial composite action. A good agreement is obtained between the analytical and experimental results. Also, some suggestions to improve the design of the composite element are discussed.
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| 19. |
- Hassan, Osama, 1969-, et al.
(författare)
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Experimental verification of static buckling of partially composite beams and beam-columns
- 2015
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Ingår i: <em>Proceeding Advanced Materials World Congress</em>.
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Konferensbidrag (refereegranskat)abstract
- The authors present an experimental study on static buckling of partially composite beams and beam-columns. In this context, a composite wall segment is tested consisting of timber studs connected to specially designed plywood board by means of shear connectors. The critical loads that characterise the buckling of timbre beams/columns with partial composite action are calculated both experimentally and theoretically. A good agreement is obtained between the analytical and experimental results. Further, it is discussed from the practical point of view that factors, which affect the deviation between the theoretical and experimental results.
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| 20. |
- Hassan, Osama, 1969-, et al.
(författare)
-
Glued laminated timber and steel beams : A comparative study of structural design, economic and environmental consequences
- 2018
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Ingår i: Journal of Engineering, Design and Technology. - England : Emerald Group Publishing Limited. - 1726-0531 .- 1758-8901. ; 16:3, s. 398-417
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Tidskriftsartikel (refereegranskat)abstract
- Purpose – This paper compares 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 analyzed 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.
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| 21. |
- Hassan, Osama, 1969-, et al.
(författare)
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Lecablock, an Alternative Construction Material for the Exterior Walls of Passive House
- 2014
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Ingår i: Journal of Building Construction and Planning Research. - : Scientific Research Publishing. - 2328-4889 .- 2328-4897. ; 2:2, s. 96-108
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Tidskriftsartikel (refereegranskat)abstract
- In this paper it is attempted to investigate the Leca blocks as sustainable construction material forthe exterior walls of passive house. The building physical properties of Leca design wall structureare studied along with the environmental impact and load-bearing capacity. To compare the results,a similar analysis is carried out considering the traditional wooden wall construction of passivehouses. The results showed that Leca design wall structure can be an alternative sustainablesolution to the traditional wooden wall structure of passive house, mainly due to its low U-value,its ability to handle moisture, and comparable structural load-bearing capacity. However, thewooden wall structure is more environmentally friendly than the Leca blocks due to its loweremissions to the environment and reduced energy use, especially during the manufacturing process.
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| 22. |
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| 23. |
- Hassan, Osama, 1969-
(författare)
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On the structural stability of timber members to Eurocode
- 2024
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Ingår i: Mechanics based design of structures and machines. - : Taylor & Francis. - 1539-7734 .- 1539-7742.
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Tidskriftsartikel (refereegranskat)abstract
- This study investigates the load-bearing behaviour of timber members subjected to combined compression and bending based on the guidelines of the standard Eurocode 5. In this context, two design approaches are stated to account for flexural buckling: the effective length method and the second-order analysis. Although Eurocode 5 states that second-order analysis can be carried out to check the stability of beam-columns, it does not mention how to formulate this analysis. This study investigates this case in order to develop alternative interaction formulae to check the stability of timber members subjected to simultaneously acting axial compression and bending moments with risk of buckling failure. Firstly, expressions are derived to formulate the interaction formulae based on second-order analysis. Secondly, the derivedinteraction formulae are compared with Eurocode 5 formulation. A parametric study is carried out to compare the two methods and the differences between results are discussed. The second-order analysis advanced in this paper can be an alternative tool to be used by the structural engineer to assess the stability of axially loaded members subjected to the risk of flexural buckling failure.
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| 24. |
- Hassan, Osama, 1969-, et al.
(författare)
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Peer-lärande och formativ bedömning : en väg till bättre lärande
- 2013
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Ingår i: Reformation, revolution, evolution. - Umeå : Universitetspedagogiskt centrum (UPC), Umeå universitet. - 9789174595710 ; , s. 97-106
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Konferensbidrag (övrigt vetenskapligt/konstnärligt)abstract
- I denna artikel introduceras en modell för lärande där peer - lärande och formativ bedömning är integrerade med en traditionell föreläsningsform. I detta sammanhang genomfördes en fältstudie för att testa användbarheten av modellen för en byggingenjörskurs. Resultaten visar att modellen har gett lovande resultat med hänsyn till uppfyllandet av de förväntade studieresultaten. Artikeln diskuterar också några praktiska och teoretiska aspekter samt vilka hänsynstagande till kursens innehåll och uppläggning som skulle kunna påverka vid fullgörandet av modellen.
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| 25. |
- Hassan, Osama, 1969-
(författare)
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Practical expressions to calculate the main vertical actions on load-bearing columns/walls to Eurocode
- 2017
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Ingår i: Journal of Engineering, Design and Technology. - UK : Emerald Group Publishing Limited. - 1726-0531 .- 1758-8901. ; 15:7, s. 418-435
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Tidskriftsartikel (refereegranskat)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.
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| 26. |
- Hassan, Osama, 1969-
(författare)
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Remediation Of Chromium-contaminated Soil Using Blast Furnace Slag
- 2011
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Ingår i: International Journal of Sustainable Development and Planning. - : WIT Press. - 1743-7601 .- 1743-761X. ; 6:1, s. 81-90
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Tidskriftsartikel (refereegranskat)abstract
- In this paper, it is attempted to study the capacity of blast furnace to stabilize cr(VI)-contaminated soils. The slag samples are incorporated with soils in different proportions and the resulted leachate is tested using batch and column experiments to simulate static and dynamic flows. furthermore, the mechanism by which the chro-mium in the soil is reduced by the iron slag is discussed. The study demonstrated that blast furnace slag can effectively stabilize cr(VI)-contaminated soils.
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| 27. |
- Hassan, Osama, 1969-
(författare)
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The effect of flexural–torsional buckling on the stability of timber members : a case study
- 2021
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Ingår i: SN Applied Sciences. - Schweiz : Springer. - 2523-3963 .- 2523-3971. ; 3:6
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Tidskriftsartikel (refereegranskat)abstract
- This study investigates the stability of timber members subjected to simultaneously acting axial compression and bending moment, with possible risk for torsional and flexural–torsional buckling. This situation can occur in laterally supported members where one side of the member is braced but the other side is unbraced. In this case, the free side will buckle out of plane while the braced side will be prevented from torsional and flexural–torsional buckling. This problem can be evident for long members in timber-frame structures, which are subjected to high axial compression combined with bending moments in which the member is not sufficiently braced at both sides. This study is based on the design requirement stated in Eurocode 5. Solution methods discussed in this paper can be of interest within the framework of structural and building Engineering practices and education in which the stability of structural elements is investigated.
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| 28. |
- Hassan, Osama, 1969-
(författare)
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The role of peer-learning and formative assessment in effective engineering learning environments : A case study
- 2014
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Ingår i: Journal of Applied Research in Higher Education. - : Emerald Group Publishing Limited. - 2050-7003 .- 1758-1184. ; 6:2, s. 285-294
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Tidskriftsartikel (refereegranskat)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.
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| 29. |
- Hassan, Osama, 1969-, et al.
(författare)
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Val av bärande system ur hållbara byggnaders perspektiv, en fallstudie
- 2022
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Ingår i: Bygg och Teknik. - Tyresö : Byggteknikförlaget. - 0281-658X .- 2002-8350. ; 114:6, s. 55-57
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Tidskriftsartikel (övrigt vetenskapligt/konstnärligt)abstract
- Syftet med artikeln är att studera hur valet av bärande system kan påverka mängden av betong och armering som används i grundläggning och dess inverkan på ekonomin och miljöfaktorer.
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| 30. |
- Schedin, Staffan, et al.
(författare)
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An Integrated Learning Model In Collaboration With Industrial Partners
- 2014
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Ingår i: Proceedings of the 10th International CDIO Conference, Universitat Politècnica de Catalunya, Barcelona, Spain, June 16-19, 2014<em></em>. - Spain : Universitat Politècnica de Catalunya. - 846972147X - 9788469721476 ; , s. 1-9
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Konferensbidrag (refereegranskat)abstract
- We present a recently developed learning model of work integrated learning in the Bachelor programs in Mechanical Engineering as well as Electronic and Computer Engineering at Umeå University, Sweden. The model is based on an organized collaboration with our 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. We 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. A number of positive effects have been observed and documented as follows:i) The integrated learning improves the learning process for the students, where learning, knowledge and practice are integrated into the engineering curricula.ii) 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.iii) 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.We discuss the experiences of this learning model in relation to CDIO standard 7 (Integrated Learning Experiences) and 8 (Active Learning). It has been found that the company based projects promote interdisciplinary learning as well as fostering system building skills and personal communication skills. Moreover, the developed learning model supports the expected learning outcomes, especially with regard to interpersonal skills, teamwork and communication. Finally, we investigate the learning theories that support the developed learning model from a pedagogical point of view.
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| 31. |
- Schedin, Staffan, et al.
(författare)
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Modell för arbetsintegrerat lärande på högskoleingenjörsutbildning
- 2013
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Konferensbidrag (refereegranskat)abstract
- Vi beskriver en nyligen införd modell för arbetsintegrerat lärande (AIL) eller co-op (co-operative education) på högskoleingenjörsprogrammen i maskinteknik respektive elektro- och datorteknik. Modellen innebär att genom samverkan med företag i närregionen erbjuda och garantera ett antal programstudenter feriearbeten under två perioder, samt examensarbeten. I modellen ingår också företagsanknutna projektarbeten och en studieresa. Upplägget förväntas bidra till positiva effekter för samtliga parter, för utbildningsprogrammen, för samarbetsföretagen samt för studenterna. Vi förklarar även hur arbetsintegrerat lärande stöds av vedertagna lärandeteorier.
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| 32. |
- Schedin, Staffan, et al.
(författare)
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Work integrated learning model in relation to CDIO standards
- 2016
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Ingår i: Journal of Applied Research in Higher Education. - London : Emerald Group Publishing Limited. - 2050-7003 .- 1758-1184. ; 8:3, s. 278-286
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Tidskriftsartikel (refereegranskat)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.
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| 33. |
- Verde, Jakob, et al.
(författare)
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Uttorkning av betong– En praktisk uppföljning av mätningar från byggskedet
- 2018
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Ingår i: Bygg och Teknik. - Stockholm, Sweden : Förlags AB Bygg & Teknik. - 0281-658X .- 2002-8350. ; :5, s. 56-58
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Tidskriftsartikel (populärvet., debatt m.m.)abstract
- Den vanligaste konstruktionen nuförtiden vid byggnation av hus är platta på mark. Konstruktionen har varit vanligt förekommande i olika varianter sedan 50-talet. På grund av dess markkontakt har fuktproblem uppstått i konstruktionen av olika anledningar och konstruktionen har med tiden förbättrats för att undvika framtida problem. Dagens konstruktion kan få fuktproblem om den inte får torka ut ordentligt innan ytskikt applicerats och uttorkningen till största del långsamt upphör. De krav som ställs på uttorkning idag baseras på den kunskap och de erfarenheter som samlats in i äldre konstruktioner. På senareår har utvecklingen av betong gått framåt och idag används en betongmed betydligt lägre vct (vattencementtal) än tidigare. Hur denna betong med ytskikt torkar ut och uppför sig med hänsyn till eventuella fuktproblem finns det inte så många fältstudier på. Resultatet från studiet visar på att trots erforderlig uttorkning har skett finns det ändå höga halter kemiska föreningar under ytskikten som visar på att skador till följd av fukt har uppkommit.
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