1,173 research outputs found
Wintergroenten.nl: Teelttips voor groenten onder glas
In de winter worden veel verse groenten vanuit het buitenland ingevoerd. Tegelijkertijd neemt de vraag naar regioproducten toe. In het praktijknetwerk wintergroenten.nl ligt de focus op afzet in de eigen regio en in ruimere zin de regio Nederland. Welke gewassen groeien in de winterperiode in een onverwarmde of licht gestookte kas? Zijn er mogelijkheden voor nieuwe gewassen en worden deze opgenomen door de markt? Om de ervaringen en kennis over de verschillende winterteelten verder te verspreiden is besloten om vanuit het praktijknetwerk deze brochure uit te geven. De nadruk ligt bij de teelt en noodzakelijke teeltkennis over de meest voorkomende winterteelten, maar ook acceptatie vanuit de markt en aandachtspunten bij de afzet van wintergroenten worden hierin meegenomen. Mogelijk stimuleert deze brochure de uitbreiding van biologische winterteelten en daarmee de verbreding van het aanbod in het groenteschap met aantrekkelijke wintergroenten uit eigen regio
Cyclic thermo-mechanical material modelling and testing of 316 stainless steel
A programme of cyclic mechanical testing of a 316 stainless steel, at temperatures of up to 600 °C under isothermal conditions, for the identification of material constitutive constants, has been carried out using a thermo-mechanical fatigue test machine (with induction coil heating). The constitutive model adopted is a modified Chaboche unified viscoplasticity model, which can deal with both cyclic effects, such as combined isotropic and kinematic hardening, and rate-dependent effects, associated with viscoplasticity. The characterisation of 316 stainless steel is presented and compared with results from tests consisting of cyclic isothermal, as well as in-phase and out-of-phase thermo-mechanical fatigue conditions, using interpolation between the isothermal material constants to predict the material behaviour under anisothermal conditions
Marginal Release Under Local Differential Privacy
Many analysis and machine learning tasks require the availability of marginal
statistics on multidimensional datasets while providing strong privacy
guarantees for the data subjects. Applications for these statistics range from
finding correlations in the data to fitting sophisticated prediction models. In
this paper, we provide a set of algorithms for materializing marginal
statistics under the strong model of local differential privacy. We prove the
first tight theoretical bounds on the accuracy of marginals compiled under each
approach, perform empirical evaluation to confirm these bounds, and evaluate
them for tasks such as modeling and correlation testing. Our results show that
releasing information based on (local) Fourier transformations of the input is
preferable to alternatives based directly on (local) marginals
Thermal Shielding Near Intermediate Supports of Continuous Span Composite Slabs
At TNO Building and Construction Research, in close co-operation with the Eindhoven University of Technology, research is carried out on the behaviour of fire-exposed composite steel/concrete slabs, in the framework of a research project co-sponsored by the ECSC (European Community for Steel and Coal). The paper describes the state of the art of the research project
Discovering Motifs in Real-World Social Networks
We built a framework for analyzing the contents of large social
networks, based on the approximate counting technique developed
by Gonen and Shavitt. Our toolbox was used on data from a large
forum---\texttt{boards.ie}---the
most prominent community website in Ireland.
For the purpose of this experiment, we were granted access to 10 years of
forum data. This is the first time the approximate counting
technique is tested on
real-world, social network data
Carbon nanotube-Si diode as a detector of mid-infrared illumination
We report a room temperature mid-infrared photodetector based on a carbon nanotube-silicon heterojunction nanostructure. The observed mid-infrared band (8–12 μm) role= presentation \u3e(8–12μm) in the photocurrent spectrum is consistent with the estimated band gap energy of semiconducting multiwall nanotubes (15 to 30 nm diameter). The fast response time (16 ms) and small temperature change (∼10−8 K) role= presentation \u3e(∼10−8K) upon infrared light suggest that the photocurrent response is not due to bolometric effect. We determined that the primary mechanism of the photocurrent in this spectral range is associated with photon absorption of semiconducting multiwalled carbon nanotubes followed by charge separation at the interface, their transport, and collection at the external electrodes
Micro-scale testing and micromechanical modelling for high cycle fatigue of CoCr stent material
3D Printed Complete Removable Dental Prostheses: a Narrative Review
Background: The purpose of this paper is to review the available literature on three-dimensionally printed complete dentures in terms of novel biomaterials, fabrication techniques and workflow, clinical performance and patient satisfaction. Methods: The methodology included applying a search strategy, defining inclusion and exclusion criteria, selecting studies and forming tables to summarize the results. Searches of PubMed, Scopus, and Embase databases were performed independently by two reviewers to gather literature published between 2010 and 2020. Results: A total of 126 titles were obtained from the electronic database, and the application of exclusion criteria resulted in the identification of 21 articles pertaining to printed technology for complete dentures. Current innovations and developments in digital dentistry have successfully led to the fabrication of removable dental prostheses using CAD/CAM technologies. Milled dentures have been studied more than 3D printed ones in the currently available literature. The limited number of clinical studies, mainly case reports, suggest current indications of 3D printing in denture fabrication process to be custom tray, record bases, trial, interim or immediate dentures but not definitive prostheses fabrication. Limitations include poor esthetics and retention, inability to balance occlusion and low printer resolution. Conclusions: Initial studies on digital dentures have shown promising short-term clinical performance, positive patient-related results and reasonable cost-effectiveness. 3D printing has potential to modernize and streamline the denture fabrication techniques, materials and workflows. However, more research is required on the existing and developing materials and printers to allow for advancement and increase its application in removable prosthodontics. © 2020, The Author(s)
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