589 research outputs found
The behaviour of single-mode taper and its gap-device application
No full textBeam expanders are required for in-line fibre devices such as connectors and power splitters. Such expansion has generally relied on a lens to achieve the necessary beam size. In this letter we demonstrate a rugged alternative approach which is based on the expansion of the field when a monomode fibre is tapered
Remembrance as optic lens of the mind in the editing of memories through participatory listening in liturgy / F.P. (Ferdi) Kruger
No full textResearch indicates that worshippers have to contend with a process of recognition (remembrance) during participation in liturgy. This article identifies two centre-points within the listening process, namely listening as central activity during participation as well as listening in order to see differently that will result in doing differently. The research question is: What kind of dynamic perspectives could emanate from research on remembrance as the editing of memories in enabling listeners to cultivate a cognizance of seeing? A listener’s remembrance has to do with recollecting familiar things, events and words. Remembering brings new meaning and understanding. Recognition is the spark that ignites participants ‘ ability to participate in the listening-process. This investigation was done from a practical-theological vantage point with inter-disciplinary engagement with social psychology and communication sciences. Anamnesis is examined from the perspective of recognition viewed from the sermon to the Hebrews. The article closes with perspectives on the creative functioning of recognition as part of active listening
TRY plant trait database: enhanced coverage and open access
No full textPlant traits—the morphological, anatomical, physiological, biochemical and phenological characteristics of plants—determine how plants respond to environmental factors, affect other trophic levels, and influence ecosystem properties and their benefits and detriments to people. Plant trait data thus represent the basis for a vast area of research spanning from evolutionary biology, community and functional ecology, to biodiversity conservation, ecosystem and landscape management, restoration, biogeography and earth system modelling. Since its foundation in 2007, the TRY database of plant traits has grown continuously. It now provides unprecedented data coverage under an open access data policy and is the main plant trait database used by the research community worldwide. Increasingly, the TRY database also supports new frontiers of trait-based plant research, including the identification of data gaps and the subsequent mobilization or measurement of new data. To support this development, in this article we evaluate the extent of the trait data compiled in TRY and analyse emerging patterns of data coverage and representativeness. Best spe- cies coverage is achieved for categorical traits—almost complete coverage for ‘plant growth form’. However, most traits relevant for ecology and vegetation modelling are characterized by continuous intraspecific variation and trait–environmental relationships. These traits have to be measured on individual plants in their respective environment. Despite unprecedented data coverage, we observe a humbling lack of completeness and representativeness of these continuous traits in many aspects. We, therefore, conclude that reducing data gaps and biases in the TRY database remains a key challenge and requires a coordinated approach to data mobilization and trait measurements. This can only be achieved in collaboration with other initiatives.Plant sciencesNaturali
The effect of the through-the-thickness compressive stress on mode II interlaminar fracture toughness
No full textThe effect of through-the-thickness compressive stress on the mode II interlaminar fracture toughness is investigated experimentally and replicated numerically. The modified Transverse Crack Tensile specimen recently proposed by the authors is used, together with an experimental device designed to apply a constant transverse compressive stress on the surface of the specimen. Experiments are conducted using IM7/8552 specimens for different compressive stresses, ranging from 0 to 100 MPa, covering all the practical applications commonly encountered in the aeronautical industry (e.g., tightened filled holes or bolted joints). It is shown that the mode II interlaminar fracture toughness increases with the applied compressive through-the-thickness stress. Finally, experiments are replicated using appropriate numerical models based on cohesive elements that take into account frictional effects. A good agreement between numerical predictions and experiments is found.</p
Computer-integrated structural engineering: Supporting the structural engineer's participation in a computer-integrated contruction process
No full textCivil Engineering and Geoscience
ICT-enabled communication and co-operation in large-scale on-site construction projects
No full textCivil Engineering and Geoscience
Computer Aided Design for Construction in the Building Industry
No full textCivil Engineering and Geoscience
Conceptual modelling structure and shape of complex civil engineering projects
No full textCivil Engineering and Geoscience
Data presented in the paper: "Micromechanics-based surrogate models for the response of composites: A critical comparison between a classical mesoscale constitutive model, hyper-reduction and neural networks"
No full textThis package contains the data presented in the following publication:
I.B.C.M. Rocha, P. Kerfriden, F.P. van der Meer, "Micromechanics-based surrogate models for the response of composites: A critical comparison between a classical mesoscale constitutive model, hyper-reduction and neural networks", European Journal of Mechanics A/Solids 2020.
All data have been generated with simulations with the in-house finite element code as described in the paper. Simulation results have been processed to generate the relevant plots for the paper. The data stored here is the processed data as used for generating the plots
Impact of coastal forcing and groundwater recharge on the growth of a fresh groundwater lens in a mega-scale beach nourishment
No full textFor a large beach nourishment called the Sand Engine – constructed in 2011 at the Dutch coast – we have examined the impact of coastal forcing (i.e. natural processes that drive coastal hydro- and morphodynamics) and groundwaterrecharge on the growth of a fresh groundwater lens between 2011 and 2016. Measurements of the morphological change and the tidal dynamics at the study site were incorporated in a calibrated three-dimensional and variabledensitygroundwater model of the study area. Simulations with this model showed that the detailed incorporation of both the local hydro- and morphodynamics and the actual recharge rate can result in a reliable reconstruction of the growth in fresh groundwater resources. In contrast, the neglect of tidal dynamics, land-surface inundations, and morphological changes in model simulations can result in considerable overestimations of the volume of fresh groundwater. In particular, wave runup and coinciding coastal erosion during storm surges limit the growth in fresh groundwater resources in dynamic coastal environments, and should be considered at potential nourishment sites to delineate the area that is vulnerable to salinization.Coastal Engineerin
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