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Bos, Freek (author), Ahmed, Zeeshan Y. (author), Romero Rodriguez, C. (author), Chaves Figueiredo, S. (author)Recent years have seen a rapid growth of additive manufacturing methods for concrete construction. Potential advantages include reduced material use and cost, reduced labor, mass customization and CO2 footprint reduction. None of these methods, however, has yet been able to produce additively manufactured concrete with material properties...journal article 2019
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Chaves Figueiredo, S. (author), Romero Rodriguez, C. (author), Ahmed, Zeeshan Y. (author), Bos, D. H. (author), Xu, Y. (author), Salet, Theo M. (author), Copuroglu, Oguzhan (author), Schlangen, E. (author), Bos, Freek P. (author)New additive manufacturing methods for cementitious materials hold a high potential to increase automation in the construction industry. However, these methods require new materials to be developed that meet performance requirements related to specific characteristics of the manufacturing process. The appropriate characterization methods of...journal article 2019
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Ahmed, S. (author), Meenar, Mahbubur (author), Alam, Ashraful (author)In a warming world, urban environmental stresses are exacerbated by population-increase-induced development of grey infrastructure that usually leaves minimal scope for blue (and green) elements and processes, potentially resulting in mismanagement of stormwater and flooding issues. This paper explores how urban growth planning in the...journal article 2019
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3D Printing Concrete on temporary surfaces: The design and fabrication of a concrete shell structureBorg Costanzi, C. (author), Ahmed, Z. Y. (author), Schipper, H.R. (author), Bos, F. (author), Knaack, U. (author), Wolfs, R.J.H. (author)One of the geometrical restrictions associated with printed paste materials such as concrete, is that material must be self-supporting during printing. In this research paper a new methodology for 3D Printing Concrete onto a temporary freeform surface is presented. This is achieved by setting up a workflow for combining a Flexible Mould...journal article 2018
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Ren, S. (author), Ahmed, N. (author), Bertels, K.L.M. (author), Al-Ars, Z. (author)In order to improve the accuracy of indel detection, micro-assembly is used in multiple variant callers, such as the GATK HaplotypeCaller to reassemble reads in a specific region of the genome. Assembly is a computationally intensive process that causes runtime bottlenecks. In this paper, we propose a GPU-based de Bruijn graph construction...conference paper 2018
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Schipper, H.R. (author), Borg Costanzi, C. (author), Bos, Freek (author), Ahmed, Z (author), Wolfs, R. (author)It is no secret that there have been some great advances in the realm of concrete additive manufacturing. However, one of the major drawbacks of this fabrication technique is that the elements must be self-supporting during printing. While most other additive manufacturing materials can overcome this by using a secondary printed support...working paper 2017
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Ahmed, N. (author), Bertels, K.L.M. (author), Al-Ars, Z. (author)DNA read alignment is a major step in genome analysis. However, as DNA reads continue to become longer, new approaches need to be developed to effectively use these longer reads in the alignment process. Modern aligners commonly use a two-step approach for read alignment: 1. seeding, 2. extension. In this paper, we have investigated various...conference paper 2016
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- Korostelev, F (author), Leroy, S (author), Keir, D (author), Weemstra, C. (author), Boschi, L (author), Molinari, I (author), Ahmed, A (author), Stuart, GW (author), Rolandone, F (author), Khanbari, K (author), Al-Laz, A (author) journal article 2016
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Thajeel, J. (author), Al-Bittar, T. (author), Ahmed, A. (author), Soubra, A-H. (author)The failure probability of geotechnical structures with spatially varying soil properties is generally computed using Monte Carlo simulation (MCS) methodology. This approach is well known to be very time-consuming when dealing with small failure probabilities. One alternative to MCS is the subset simulation approach. This approach was mainly...conference paper 2015
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Akram, M. (author), Jansen, K.M.B. (author), Ernst, L.J. (author), Bhowmik, S. (author), Ajeesh, G. (author), Ahmed, S. (author), Chakraborty, D. (author)This investigation highlights the effect of surface modification on polyimide by atmospheric pressure plasma treatment with different exposure time. Surface modification of polymer by plasma treatment essentially creates physical and chemical changes such as cross-linking and formation of free radicals. It also forms oxygen functionalization in...journal article 2015
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- Breuer, J. (author), Ahmed, T. (author) conference paper 2015
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- Smith, G. (author), Ahmed, M. (author) conference paper 2015
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Korostelev, F. (author), Weemstra, C. (author), Leroy, S. (author), Boschi, L. (author), Keir, D. (author), Ren, Y. (author), Molinari, I. (author), Ahmed, A. (author), Stuart, G.W. (author), Rolandone, F. (author), Khanbari, K. (author), Hammond, J.O.S. (author), Kendall, M.K. (author), Doubre, C. (author), Al Ganad, I. (author), Goitom, B. (author), Ayele, A. (author)During the breakup of continents in magmatic settings, the extension of the rift valley is commonly assumed to initially occur by border faulting and progressively migrate in space and time toward the spreading axis. Magmatic processes near the rift flanks are commonly ignored. We present phase velocity maps of the crust and uppermost mantle of...journal article 2015
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Ahmed, A. (author)In order to arrive at safe and reliable design of composite structures, understanding of the mechanisms and mechanics of damage growth in these materials is of paramount significance. Numerical models, if designed, implemented and used carefully, can be helpful not only to understand the mechanisms and mechanics of damage growth but also to...doctoral thesis 2014
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- Ahmed, A. (author), Sluys, L.J. (author) conference paper 2014
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El-Kalliny, A.S. (author), Ahmed, S.F. (author), Rietveld, L.C. (author), Appel, P.W. (author)An immobilized TiO2 photocatalyst with a high specific surface area was prepared on stainless steel woven meshes in order to be used packed in layers for water purification. Immobilization of such a complex shape needs a special coating technique. For this purpose, dip coating and electrophoretic deposition (EPD) techniques were used. The EPD...journal article 2014
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Ahmed, A. (author), Sluys, L.J. (author)Experimental testing and numerical analysis often travel in tandem in a design process. Recent advances in novel numerical techniques to simulate mesh objective crack propagation offer a great potential for accurate and efficient damage analysis of composite laminates. This paper presents a numerical study on computational modeling of mesh...journal article 2013
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Ahmed, A. (author), Sluys, L.J. (author)Numerical analysis of progressive damage in fiber-reinforced laminated composite plates is a challenge due to the presence of different, complex failure mechanisms and their mutual interaction. A meso-scopic progressive failure model is presented to simulate interacting damage mechanisms (matrix cracking and delamination) in laminated composite...conference paper 2013
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- Ahmed, Mariam S. (author), Hably, Ahmad (author), Bacha, Seddik (author) conference paper 2013
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- Ahmed, M.A. (author) doctoral thesis 2013