Institutional Repository Universiteit Antwerpen
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De maatman in het bestuursrecht: enkele hypotheses en pistes voor nader onderzoek
No full textAbstract: Wie heeft de wetgever voor ogen wanneer hij het bestuursrecht vormgeeft? Wie is met andere woorden \uabde maatman\ubb in het bestuursrecht? Deze bijdrage lanceert enkele hypotheses in dit verband en formuleert een onderzoeksagenda. Zij is opgevat als huldetekst aan prof. dr. Eric Dirix en opgenomen in een bijzonder nummer dat ter ere van hem werd samengesteld
Analysis of active mobility and active aging : insights on green street design and age-friendly policies in Portugal
No full textAbstract: The green city approach has been an emergent trend, especially given the urgency of mitigating climate change. Simultaneously, active aging policies have been advocating a safe barrier-free public space for older people. It is paramount to bridge the knowledge gap between the planning of active mobility and green streets as a response to climate change mitigation policies and the active aging and age-friendly framework. Thus, we aim to analyze: i) how active mobility and active aging policies evolved in Portugal, and ii) how active aging and older people as users were considered in the active mobility policy implementation and the green streets design in Portugal. We concluded that the active mobility policies in Portugal were driven by climate agreements, but that Lisbon began autonomously to implement its green streets network mainly from 2016 to 2017, even in the absence of a congruent national strategy. Despite this, the context of the older people was only tenuously considered in the design of these initiatives. Climate mitigation programs and green streets projects are currently not fully equipped to address the needs of older people. Moreover, the planning of programs and urban infrastructure in a truly age-friendly manner is still lacking
The logistics trade-off between D&D and warehousing costs
No full textAbstract: This study analyses the impact of container demurrage and detention (D&D) on the total logistics costs (TLC) of a shipper. More specifically, it looks into how these costs influence the decision to store cargo in a container throughout the hinterland chain or in a warehouse. To do this, a case study with company-specific data is implemented. The findings show, first of all, that the lead time plays an important role in whether D&D occurs. Longer lead times exceeding the D&D free time result in D&D costs which increase the shippers\u2019 TLC considerably. Second, the impact of D&D on the TLC is shipping line dependent. Hence, shippers can limit the TLC increase by choosing shipping lines that offer more free time for intermodal transport. Third, increases in the warehousing cost component can result in higher TLC compared to the TLC when D&D charges occur, suggesting that it might become more interesting for the shipper to store its goods in the container throughout the hinterland chain and thus pay D&D instead of in a warehouse. These results, although case-dependent, give insights into alternative storage options throughout the chain and their costs for shippers as well as that incurring D&D charges can be acceptable under certain logistics strategies
Two-level D-optimal designs for run sizes that are one less than a multiple of four
No full textAbstract: Two-level orthogonal arrays are known to be D-optimal for main-effects models in the event the number of runs is a multiple of four. Complete catalogs of non-isomorphic orthogonal arrays have been enumerated and investigated to identify those orthogonal arrays that minimize the aliasing between main effects and two-factor interactions and the aliasing among two-factor interactions. In this paper, the focus is on two-level experimental designs involving numbers of runs that are one less than a multiple of four. It turns out that many non-isomorphic D-optimal designs for main-effects models with these numbers of runs can be obtained by dropping one row from an orthogonal array. Some of these designs involve substantially less aliasing than others between the main effects and the two-factor interactions as well as among the two-factor interactions. We explain how we construct non-isomorphic D-optimal designs for main-effects models from complete catalogs of non-isomorphic orthogonal arrays, investigate the differences between these designs, and report the best of them in terms of aliasing
Enhancing user satisfaction in the reporting of online sexual harassment on social media : the role of anthropomorphic design in mitigating negative emotions and building trust
No full textAbstract: The use of reporting systems for sexual harassment and other transgressive behavior on social media often results in low user satisfaction due to delayed or absent responses and a lack of empathy for users' situations. This study examines whether and how anthropomorphic designs, or human-like design features, can reduce users' negative emotions, increase trust, and subsequently enhance user satisfaction with such reporting systems. In a between-subjects experiment with 286 participants, individuals were exposed to an online sexual harassment scenario as a victim-survivor and instructed to report the incident. They were assigned to one of three reporting conditions: a non-anthropomorphic design condition (a machine-like system with an interface which has no human-like attributes), a low anthropomorphic design condition (a basic chatbot system, with an interface which has a low level of human attributes), and a high anthropomorphic design condition (a chatbot system with a high level of human attributes). Results indicated that both high and low anthropomorphic designs increased perceived anthropomorphism which significantly improved user satisfaction compared to non-anthropomorphic designs by reducing negative emotions and increasing trust, and that high anthropomorphic designs led to the highest levels of overall user satisfaction. This study contributes to the literature by advancing the understanding of anthropomorphic design's impact on user interaction in the specific context of reporting systems for online sexual harassment. Additionally, it provides practical design recommendations for social media platforms to implement more empathetic and supportive reporting systems, ultimately enhancing user satisfaction
\u2018I really care about the environment, but \u2026\ua0\u2019 Unravelling the complex dilemmas of the eco-engaged through the enactment of environmental care
No full textAbstract: As environmental concerns intensify, individuals committed to sustainability are increasingly confronted with complex dilemmas in their attempts to integrate environmental care into their daily lives. This study examines the ways in which eco-engaged citizens navigate these ambivalences, focusing on the enactment of environmental care. Drawing on 23 semi-structured interviews with eco-engaged citizens in Flanders (Belgium), the findings show that environmental care is not a fixed set of eco-friendly behaviours but a dynamic and evolving practice. Participants often experience moral conflicts and practical dilemmas as they try to reconcile environmental care with stable routines and cultural expectations tied to other forms of care such as familial and bodily care. However, in some contexts, synergies can emerge between these different forms of care, blurring the boundaries between caring for oneself, one\u2019s family and the environment. We conclude our study with a reflection on the multifaceted and situated nature of environmental care in everyday life
End-to-end network slicing : securing sensitive data across the network
No full textAbstract: Internet of Things (IoT) devices are increasingly being deployed in critical applications, such as eHealth systems, enabled by advancements in 5G technology, which offer more than 100 Mbps of throughput, less than 5 ms of latency, and 99,999% of reliability. However, to overcome computing limitations and security measures, IoT devices rely on cloud based solutions to outsource data processing. This dependency introduces significant security concerns, as sensitive data must be transmitted over the network and processed in external environments, increasing the risk of interception, unauthorized access, and data breaches. To mitigate these security risks, within the scope of the MOZAIK project, we deploy Network Slicing to ensure end-to-end inter-slice and intra-slice isolation across all network domains i.e., 5G Core (5GC), Transport Network (TN), and Radio Access Network (RAN). We deploy a synergy across the entire network infrastructure i.e., 5GC, TN, and RAN, to isolate the IoT data flows from the moment the data is generated until it reaches the cloud, safeguarding sensitive data during transmission. The results of our real-life experiments demonstrate that our proof of concept provides robust isolation between slices, effectively addressing the security concerns of IoT devices and enhancing the reliability and security of IoT applications. Additionally, we also include aspects of secure data storage and secure data processing, covered in the MOZAIK project
1,6\u2010hexanediol diacrylate, isocyanates and other skin sensitizers are emerging contact allergens in guardian glucose sensors
No full textAbstract: Background: Allergic contact dermatitis (ACD) from diabetes devices remains a significant concern. Objective: To report ACD from Guardian 3 and 4 glucose sensors (G3/4 sensors) due to multiple skin sensitizers, that is, isobornyl acrylate (IBOA), N,N-dimethylacrylamide (DMAA) and also 1,6-hexanediol diacrylate (HDDA), isocyanates, colophonium derivatives, tert-butylphenols (TBPs) and salicylates. Methods: Twenty-seven patients with ACD from G3/4 sensors, evaluated between January 2020 and December 2024, were patch-tested to a baseline, acrylate, isocyanate and plastics and glue series. The sensors and their overtape (Oval Tape) were analysed with gas chromatography\u2013mass spectrometry (GC-MS). Results: Most patients (44%) reacted to colophonium (derivatives), followed by IBOA (31%) and isocyanates (29%). Fewer, yet remarkable reactions were observed to HDDA (20%), TBPs (12.5%) and DMAA (8%). All IBOA and DMAA-allergic patients had been previously sensitised by the FreeStyle I sensor, whereas patients using G3/4 sensors as their first diabetes device were not sensitised to these two allergens. Chemical analyses confirmed the presence of colophonium derivatives, IBOA, DMAA, HDDA,isocyanates, TBPs and, interestingly, also salicylates, as skin sensitizers in these sensors. Conclusions: The newer glucose sensors Guardian 3 and 4 contain, besides IBOA and DMAA, also HDDA, together with a multitude of other skin sensitizers that put patients at risk of developing ACD