1,293 research outputs found
Eating the life sentence elephant : one bite at a time
No full textLora Bex Lempert, professor emerita of Sociology and Women's and Gender Studies at the University of Michigan-Dearborn, delivers a talk entitled "Eating the life sentence elephant : one bite at a time." Lempert describes her research into how women, incarcerated for life in Michigan prisons, cope pragmatically and creatively with their sentences by constructing meaningful lives inside prison. She answers questions from the audience
Two-component injection moulding of thermoplastics with thermoset rubbers: Process development
No full text© 2017 Author(s). Two-component injection moulding is a manufacturing process for combining polymers with different properties in a single injection moulding process. The process is typically used to combine thermoplastics with another thermoplastic or with a thermoplastic elastomer to create colour differences or hard and soft areas respectively. The present study aims at the development of a two-component injection moulding process for the combination of a thermoset rubber and a thermoplastic. Currently products that consist of those two materials (e.g. wheels, syringes and other products with gaskets) are made by assembling separate components. Implementing the two-component injection moulding technique for these products will result in better interphase properties, savings on rubber and avoiding costs related to the assembly process. A technological challenge is posed by the fact that injection moulding of rubbers and thermoplastics is fundamentally different. The injection moulding of a rubber requires a heated mould (140°C-180°C) whereas thermoplastics need a relatively cold mould (20°C-100°C) for the polymer to solidify. In this study a versatile two-component mould is proposed in which the mould cavities for the rubber and the thermoplastic are thermally separated and equipped with facilities to control the temperature of both cavities individually. The design of the mould also makes it possible to vary the sequence of injection. In this way it is possible to test several processes variations. Preliminary test results will be presented for specific rubber-thermoplastic combinations.sponsorship: G. Bex acknowledges Research Foundation - Flanders (FWO) for funding his PhD grant Strategic Basic Research. The authors also acknowledge the company Hercorub NV for providing the rubber material. (Research Foundation - Flanders (FWO))status: Publishe
Four 18th century flute quartets / J. B. Viotti, François Devienne, J.C. Bach... [et al.], comp. ; Jean-Pierre Rampal, fl. ; Robert Gendre, vl ; Roger Lepauw, alto ; Robert Bex, vlc
No full textTitre uniforme : Viotti, Giovanni Battista (1755-1824). Compositeur. [Quatuors. Flûte (ou violon), violon, alto, violoncelle. W II 17. Do mineur]Titre uniforme : Devienne, François (1759-1803). Compositeur. [Quatuors. Flûte (ou violon), violon, alto, violoncelle. Op. 16, no 5. Sol majeur]Titre uniforme : Bach, Johann Christian (1735-1782). Compositeur. [Quatuors. Flûte, violon, alto, violoncelle. Op. 8, no 4. Fa majeur]Titre uniforme : Pleyel, Ignaz (1757-1831). Compositeur. [Quatuors. Flûte, trio à cordes. B 387. Ré majeur]Comprend : Quartet in C minor, letter A no 2 / Viotti, comp. ; Jean-Pierre Rampal, fl. ; Robert Gendre, vl ; Roger Lepauw, alto ; Robert Bex, vlc. ; Quartet in G major, op. 16 no 5 / Devienne, comp. ; Jean-Pierre Rampal, fl. ; Robert Gendre, vl ; Roger Lepauw, alto ; Robert Bex, vlc. ; Quartet in F major, op. 8 no 4 / J.C. Bach, comp. ; Jean-Pierre Rampal, fl. ; Robert Gendre, vl ; Roger Lepauw, alto ; Robert Bex, vlc. ; Quartet in D major, book 3 no 1 / Pleyel, comp. ; Jean-Pierre Rampal, fl. ; Robert Gendre, vl ; Roger Lepauw, alto ; Robert Bex, vlc.BnF-Partenariats, Collection sonore - BelieveContient une table des matière
A Gaussian scenario for unsupervised learning
No full textA Gaussian scenario for unsupervised learning / Peter Reimann ; Chris Van den Broeck ; Geert-Jan Bex. - In: Journal of physics. A. 29. 1996. S. 3521-353
Molecular structures of tricin and 7-O-methyl-tricin (7 MT), two compounds isolated from BEX.
No full text<p>Molecular structures of tricin and 7-O-methyl-tricin (7 MT), two compounds isolated from BEX.</p
Near-optimal combination of disparity across a log-polar scaled visual field
No full textThe human visual system is foveated: we can see fine spatial details in central vision, whereas resolution is poor in our peripheral visual field, and this loss of resolution follows an approximately logarithmic decrease. Additionally, our brain organizes visual input in polar coordinates. Therefore, the image projection occurring between retina and primary visual cortex can be mathematically described by the log-polar transform. Here, we test and model how this space-variant visual processing affects how we process binocular disparity, a key component of human depth perception. We observe that the fovea preferentially processes disparities at fine spatial scales, whereas the visual periphery is tuned for coarse spatial scales, in line with the naturally occurring distributions of depths and disparities in the real-world. We further show that the visual system integrates disparity information across the visual field, in a near-optimal fashion. We develop a foveated, log-polar model that mimics the processing of depth information in primary visual cortex and that can process disparity directly in the cortical domain representation. This model takes real images as input and recreates the observed topography of human disparity sensitivity. Our findings support the notion that our foveated, binocular visual system has been moulded by the statistics of our visual environment
Can Neuromorphic Computer Vision Inform Vision Science? Disparity Estimation as a Case Study
No full textEvaluation of the Tobii EyeX Eye tracking controller and Matlab toolkit for research
No full textThe Tobii Eyex Controller is a new low-cost binocular eye tracker marketed for integration in gaming and consumer applications. The manufacturers claim that the system was conceived for natural eye gaze interaction, does not require continuous recalibration, and allows moderate head movements. The Controller is provided with a SDK to foster the development of new eye tracking applications. We review the characteristics of the device for its possible use in scientific research. We develop and evaluate an open source Matlab Toolkit that can be employed to interface with the EyeX device for gaze recording in behavioral experiments. The Toolkit provides calibration procedures tailored to both binocular and monocular experiments, as well as procedures to evaluate other eye tracking devices. The observed performance of the EyeX (i.e. accuracy < 0.6°, precision < 0.25°, latency < 50 ms and sampling frequency ≈55 Hz), is sufficient for some classes of research application. The device can be successfully employed to measure fixation parameters, saccadic, smooth pursuit and vergence eye movements. However, the relatively low sampling rate and moderate precision limit the suitability of the EyeX for monitoring micro-saccadic eye movements or for real-time gaze-contingent stimulus control. For these applications, research grade, high-cost eye tracking technology may still be necessary. Therefore, despite its limitations with respect to high-end devices, the EyeX has the potential to further the dissemination of eye tracking technology to a broad audience, and could be a valuable asset in consumer and gaming applications as well as a subset of basic and clinical research settings
Haalbaarheid van BEX-BEA voor varkens- en pluimveebedrijven : verkenning van een verantwoordingsinstrument voor bedrijfsspecifieke milieuprestaties
No full textProeftuin Natura 2000 Overijssel (‘de Proeftuin’) richt zich op de realisatie van Natura 2000- doelstellingen in de provincie Overijssel met behoud van agrarisch ontwikkelingsperspectief. Het project combineert het ontwikkelen en toepassen van ammoniak reducerende maatregelen in de praktijk, met de kennisuitwisseling tussen veehouders, adviseurs en andere betrokkenen. Voor de melkveehouderij is de KringloopWijzer een bekend instrument voor het verantwoorden van de milieuprestaties. De BEX (Bedrijfsspecifieke Excretie) en BEA (Bedrijfsspecifieke Excretie Ammoniak) maken hier onderdeel van uit. De gedachte dat aantoonbaar goed milieugedrag door de ondernemer mag leiden tot een vorm van beloning is niet alleen voorbehouden aan de melkveehouderij. Ook de intensieve veehouderij zoekt naar ruimte om te ondernemen. De melkveehouderij zit complex in elkaar met bijvoorbeeld ruwvoeropbrengsten en rantsoenen (gras en mais) die kunnen variëren. Bij de intensieve veehouderij is de voersamenstelling nauwkeurig bekend. De aanname bij de start van deze verkenning was dan ook dat een BEX-BEA intensief eenvoudig is op te zetten
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