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Inter-session reliability of markerless lower extremity joint kinematics and kinetics for return-to-sport screening tasks
No full textEvaluating movement quality in dynamic tasks is vital in return-to-sport (RTS) decision-making, yet marker-based motion capture (MoCap) can be complex. This study assessed the inter-session reliability of lower extremity joint kinematics and kinetics obtained using Theia3D, a markerless MoCap solution, during dynamic RTS screening tasks. Eighteen healthy participants performed six tasks over two sessions. Joint kinematics and kinetics were evaluated for absolute reliability between sessions, for discrete values and time-varying profiles. Test-retest reliability was evaluated using (integrated) intraclass correlation coefficient (ICC), standard error of measurement (SEM), and minimal detectable change (MDC). With few exceptions, integrated ICC values of joint angular displacements and moments showed moderate-to-excellent reliability (0.61-0.86 and 0.62-0.90 for angles in the sagittal and frontal plane, respectively; 0.54-0.88 and 0.51-0.85 for moments). SEM values for joint angles were low, indicating minimal session-to-session variation for kinematics. However, most MDC values were relatively high compared to expected intervention effects, particularly showing that kinetic measurements may not yet accurately detect clinically meaningful changes. Overall, these findings thus support the markerless MoCap's potential for tracking lower extremity dynamics during RTS screening, particularly for kinematics and sagittal plane kinetics, but highlight limited inter-session reliability for frontal plane kinetic parameters at the hip and ankle.status: Publishe
Broadening the vibration attenuation of locally resonant metamaterials using multi-material injection moulding
No full textstatus: Accepte
Recommendations of quality indicators for use in older adult residential long-term care: a RAND/UCLA Modified eDelphi Panel Method protocol
No full textstatus: Publishe
Opinie Knack 'Ook Turkije heeft baat bij Cyprus als voorzitter van de Europese Raad'
No full textstatus: Published onlin
Catechol modification as a platform for functional coatings
No full textCatechol-based surface functionalization has emerged as a powerful strategy for tailoring material properties and enabling diverse applications, owing to its robust adhesive capabilities and broad substrate compatibility. Inspired by mussel foot proteins and popularized by dopamine-derived polydopamine coatings, catechol grafting has evolved into a versatile platform for anchoring molecules of interest (MOI) onto surfaces. This review focuses on the synthetic strategies for direct covalent modification of active compounds-such as polymers, peptides, and small molecules-with catechol moieties, bypassing the limitations of traditional bottom-up and co-deposition approaches. By examining the reactivity profiles of catechol precursors and their coupling chemistries, we aim to provide a comprehensive framework for designing functional coatings with enhanced performance and simplified processing. This work fills a critical gap in the literature by offering practical guidelines for researchers seeking to harness catechol chemistry in advanced material engineering.sponsorship: This publication was funded by the European Union through the Horizon Europe Framework Program (HORIZON) under grant number 101057992 (Recipients BM, writing; EVVdE, writing and revision). This publication has been prepared with the support of the "RUDN University Strategic Academic Leadership Program" (recipient EVVdE, writing and revision). (European Union through the Horizon Europe Framework Program (HORIZON)|101057992, RUDN University Strategic Academic Leadership Program, Horizon Europe - Pillar II|101057992)status: Publishe
Discrimination Lawsuits in Flemish Newspapers: A Longitudinal Comparative Analysis (2014-2022)
No full textsponsorship: This research was supported by funding from the KU Leuven Research Council under grant agreement C24M/22/007 (COMMunity).Onderzoeksraad, KU Leuven. (KU Leuven Research Council|C24M/22/007)status: Published onlin
Keeping religion private (to stay out of trouble): Securitized privatization and Muslim life in Belgium
No full textsponsorship: The authors disclosed receipt of the following financial support for the research, authorship, and/or publication of this article: The research for this article completed in the framework of the BELSPO project 'Folk, Authority and Radicalism' (BR/175/A4/FAR), but the writing of the paper and special issue occurred in the framework of the KU Leuven and FWO funded project 'Deradicalizing the City' (IDN/20/004 and G0D8521 N). (BELSPO project 'Folk, Authority and Radicalism'|BR/175/A4/FAR, FWO|IDN/20/004, FWO|G0D8521 N)status: Published onlin
Prestatiebeoordeling van vloeistof–vloeistof dispersieprocessen via druppelkarakterisering en evaluatie van vermogensdichtheid
No full textThis dissertation investigates the performance of multiple reactors for generating liquid-liquid dispersions. It examines how an oscillatory baffled reactor, a pulsed column, and a mixed vessel compare in terms of space-time yield and energy efficiency. To support this comparison, a methodology is developed to determine droplet size and the specific power input per volume introduced through fluid oscillations in a baffled reactor. Finally, a case study is presented in which both the oscillatory baffled reactor and the pulsed column are applied to a hydrometallurgical separation process of cobalt and nickel.
Firstly, an image-based protocol for droplet size characterization is developed. The method combines sampling, stabilization, and dilution with off-line image acquisition using a microscope. This approach offers several advantages, the most significant being the clarity of the images, which enables automated analysis via a custom Python-based script. Automation eliminates the human bias inherent in manual analysis and allows for the detection of a significantly larger number of droplets, resulting in more statistically robust outcomes. The algorithm is capable of detecting up to 8000 droplets per minute and determining the Sauter mean diameter with an accuracy of 96%. Moreover, due to the dilution step, the protocol is applicable even at high dispersed phase volume fractions, such as 50 vol%.
Another key aspect is the power density required to create a liquid-liquid dispersion. A novel method for calculating power density specifically tailored to oscillatory flow is developed. In contrast to literature, the method assumes that energy cannot be recovered during periods of negative instantaneous power density. It also incorporates experimentally measured dynamic pressure drop profiles. Additionally, the phase difference between pressure drop and fluid velocity is investigated. Results show that increasing the amplitude reduces the phase difference, whereas frequency has little to no effect. This behavior is hypothesized to originate from the different relationship that amplitude and frequency have with fluid velocity and acceleration. The newly developed method is further applied to determine the power density in both an oscillatory baffled reactor and a pulsed column. For various power densities, the approximate droplet size range is estimated, enabling a comparative ranking of the reactors based on increasing power density required to achieve a similar dispersion: pulsed column, mixed vessel, and oscillatory baffled reactor. However, the oscillatory baffled reactor can operate at significantly shorter residence times compared to the other two technologies, thereby potentially reducing the energy consumption per unit volume of processed liquid.
The hydrometallurgical separation of cobalt and nickel is investigated as a case study of liquid-liquid dispersion processes. A custom 3D-printed oscillatory baffled reactor with an internal diameter of 9 mm is employed to investigate the effect of oscillation conditions and net flow rate on cobalt extraction efficiency. Residence times between 9 and 73 seconds are explored, resulting in a space-time yield ranging from 1180 to 9443 L/Lday. A percentage extraction of 80% is achieved within 9 seconds, increasing to 97% at a residence time of 36 seconds. Based on this performance, a productivity of 116.5 g Co^{2+}/day is attained with a single reactor. In comparison, a pulsed column operated in counter-current mode demonstrates a cobalt extraction efficiency of 99.7%, surpassing both the single-stage equilibrium value of 99.4% and the performance achieved with the oscillatory baffled reactor. However, flooding conditions constrain the operating window of the pulsed column, resulting in a space-time yield of 240 L/Lday.status: Publishe
