Last 7 days
Bookmark and Share    
Full Text
Peer Reviewed
See detailSmall urban green areas
Picard, Pierre M UL; Tran, Thi Thu Huyen UL

in Journal of Environmental Economics and Management (2021), 106

This paper studies the size and location of small urban green areas across city spaces. Small urban green areas offer amenities that affect residential choices, land consumption and land rent. This paper ... [more ▼]

This paper studies the size and location of small urban green areas across city spaces. Small urban green areas offer amenities that affect residential choices, land consumption and land rent. This paper discusses the land use and locations of those areas and the resulting residential space allocation. It is shown that the land share dedicated to small urban green areas results from the trade-off between land value and population density and is a single peaked function of the distance to the city center. This result is confirmed by the empirical study of urban structures in the 305 largest EU cities using GIS data. This spatial pattern is shown to be robust to many measures of urban land uses. [less ▲]

Detailed reference viewed: 32 (1 UL)
Full Text
Peer Reviewed
See detailInstitutional Investors and Infrastructure Investing
Kräussl, Roman UL; Andonov, Aleksandar; M. Rauh., Joshua

in Review of Financial Studies (2021), 34(8)(3880-3934),

Detailed reference viewed: 42 (4 UL)
Full Text
Peer Reviewed
See detailInvestigating the role of individual differences in the hypoalgesic response to a virtual reality game: An exploratory analysis
Rischer, Katharina Miriam UL; Barcatta, Katharina; Battistutta, Layla UL et al

Scientific Conference (2021, March)

Introduction: Virtual reality (VR) has been shown to be a powerful method of redirecting attention away from pain and is increasingly used in clinical settings as a therapeutic tool for pain treatment ... [more ▼]

Introduction: Virtual reality (VR) has been shown to be a powerful method of redirecting attention away from pain and is increasingly used in clinical settings as a therapeutic tool for pain treatment. Yet, little is known about the underlying factors that modulate the size of the hypoalgesic response to a VR game, such as cognitive load and inter-individual differences in self-reported pain-related cognitions, emotion regulation habits, gaming skills, and executive functions. Methods: 90 healthy participants played two versions of the VR game 'Subnautica', differing in cognitive load (low load vs. high load). In the low load condition, participants navigated along a predefined route. In the high load condition, participants additionally memorized a series of single digits presented along the route. Pain heat thresholds as well as psychophysiological measures (ECG, EDA) were recorded during a passive control condition (in VR) prior to, as well as during, the two interactive sessions. In addition, participants completed several psychological questionnaires and different executive functioning tasks prior to the VR sessions. Results: Pain thresholds were significantly higher in the two interactive VR sessions when compared to the passive control condition, whereas the cognitive load of the game had no effect on pain thresholds. Individual differences in pain-related cognitions, prepotent response inhibition abilities and the level of emotional awareness reported by female participants, but not the level of gaming skills, influenced the size of the hypoalgesic effect. Discussion: In line with a growing body of studies, we observed a robust hypoalgesic response to playing a VR game, highlighting once more the potential of VR as a tool for pain reduction. Importantly, the hypoalgesic effect was not dependent on the participants’ level of gaming skills or the cognitive load of the game, suggesting that the sensory properties of the VR game were sufficient to change the processing of pain. [less ▲]

Detailed reference viewed: 55 (6 UL)
Full Text
Peer Reviewed
See detailBewegte Balladen: Balladen durch Erklärvideos erschließen. Unterrichtsmaterialien für den Deutschunterricht
Baumann, Isabell Eva UL

in Programme for Innovative Teaching and Training (PITT) (2021)

Detailed reference viewed: 40 (5 UL)
Full Text
See detailSmart Retail Banking: Potentiale und Herausforderungen Künstlicher Intelligenz
Fridgen, Gilbert UL; Körner, Marc-Fabian; Rägo, Vadim et al

Report (2021)

Detailed reference viewed: 35 (0 UL)
Full Text
Peer Reviewed
See detailRecent Developments and Overview of the Country and Practitioner’s Reports
Cole, Mark David UL

in European Data Protection Law Review (2021), 7(1), 91-93

Detailed reference viewed: 13 (0 UL)
Full Text
Peer Reviewed
See detailExplorative analysis of potential MaaS customers: An agent-based scenario
Cisterna, Carolina UL; Giorgione, Giulio UL; Viti, Francesco UL

in Transportation Research Procedia (2021)

Detailed reference viewed: 27 (2 UL)
Full Text
See detailHow does Responsible Research & Innovation apply to the concept of the Digital Self, in consideration of privacy, ownership and democracy?
van Schagen, Sijmen UL

Bachelor/master dissertation (2021)

This master thesis studies to what degree Responsible Research & Innovation (RRI) can be applied to the concept of the Digital Self (DS). In order to examine this properly, it focuses on aspects of ... [more ▼]

This master thesis studies to what degree Responsible Research & Innovation (RRI) can be applied to the concept of the Digital Self (DS). In order to examine this properly, it focuses on aspects of privacy, ownership and democracy. This work is inspired by the digital health domain, where a growing number of patients become enabled to benefit from AI-powered clinical decision sup port. Aim of this study is to provide insight into what cases can be considered for exploring new design requirements for digital health applications. Increasingly, we use technology to manage our daily digital selves. Our smartphones, being examples of extensions of ourselves, are able to empower us as citizens within a democracy. The decision-making process belongs more and more to the realm of artificial intelligence (AI), powering our extended selves with algorithms. Although the era of the DS has already begun, it remains unnoticed by the paradigm of RRI. Instead of empowering informational self-determination, RRI tends to be overprotective of an outdated concept of what it is like to act as a human within a democracy which is obviously reshaped by digitization. In order to maintain our general understanding of a democracy, there is a need for a concept of the DS in the near future. Not only will the DS-concept have the capacity to empower a democratic citizen, it will also be able to empower patients within a digital health environment. Due to the data hunger of large technology companies and governments, it has already become clear that the rise of digitization comes with a price for our society and our health. Therefore, it is the DS concept that can make a difference in contributing to ethical and social standards. If the future of digital health offers us – additional to human medical stakeholders – AI-powered digital health apps to increase the quality of healthcare, we have the duty to take our values into account when designing such apps. [less ▲]

Detailed reference viewed: 245 (1 UL)
See detailTrois films du projet COVID-Kids : 1. Écoutez les enfants et les adolescents ; 2. La peur de tomber malade ;3. Expériences avec le travail scolaire à la maison
Kirsch, Claudine UL; Engel de Abreu, Pascale UL; Neumann, Sascha et al

Learning material (2021)

COVID-Kids Le projet COVID-Kids vise à explorer le bien-être des enfants et leurs expériences quotidiennes pendant la pandémie de Coronavirus entre mai et juillet 2020. Film 1 Écoutez les enfants et les ... [more ▼]

COVID-Kids Le projet COVID-Kids vise à explorer le bien-être des enfants et leurs expériences quotidiennes pendant la pandémie de Coronavirus entre mai et juillet 2020. Film 1 Écoutez les enfants et les adolescents Ce premier épisode présente le projet COVID-Kids ainsi que quelques constations clés. Il montre quatre enfants ayant vécu des expériences différentes durant la pandémie. Tandis que certains ont trouvé stressant ou ennuyeux le fait d'être à la maison, d'autres ont apprécié le temps passé en famille. L'objectif du projet COVID-Kids est d'explorer le bien-être des enfants et leurs expériences quotidiennes pendant la pandémie de Coronavirus entre mai et juillet 2020. Film 2 La peur de tomber malade Quatre enfants parlent de la peur de tomber malade. Alors que deux n'avaient pas peur, un enfant craignait qu'un membre de sa famille tombe malade et un autre s'est fait gronder par des adultes parce qu'ils pensaient qu'il s'était trop rapproché. D’autres résultats du projet sont présentés. L'objectif du projet COVID-Kids est d'explorer le bien-être des enfants et leurs expériences quotidiennes pendant la pandémie de Coronavirus entre mai et juillet 2020. Film 3 Expériences avec le travail scolaire à la maison Ce dernier film présente quelques prédicteurs du bien-être des enfants liés au travail scolaire pendant la pandémie : la quantité, la difficulté et le contenu des devoirs. Les expériences des enfants ont varié et tout le monde ne s'en est pas bien sorti. L'objectif du projet COVID-Kids est d'explorer le bien-être des enfants et leurs expériences quotidiennes pendant la pandémie de Coronavirus entre mai et juillet 2020. [less ▲]

Detailed reference viewed: 27 (0 UL)
See detailThree movies of the project COVID-Kids: 1. Listen to children and young people; 2. The fear of getting ill; 3. Home schooling experiences
Kirsch, Claudine UL; Engel de Abreu, Pascale UL; Neumann, Sascha et al

Learning material (2021)

COVID-Kids The aim of the project COVID-Kids is to explore children’s well-being and stay-at-home experiences during the Coronavirus pandemic in May-July 2020 Episode 1 Listen to children and young people ... [more ▼]

COVID-Kids The aim of the project COVID-Kids is to explore children’s well-being and stay-at-home experiences during the Coronavirus pandemic in May-July 2020 Episode 1 Listen to children and young people This first episode introduces the project COVID-Kids and some of its findings. It features four children who had different experiences during the pandemic. While some children found it stressful or boring to be at home, others enjoyed the quality time with their family. The aim of the project COVID-Kids is to explore children’s well-being and stay-at-home experiences during the Coronavirus pandemic in May-July 2020 Episode 2 The fear of getting ill Four children speak about the fear of getting ill. While two were not afraid, one child was worried that a family member fell ill and another one experienced adults shouting at him because they believed he had come too close. Further results of the project are presented. The aim of the project COVID-Kids is to explore children’s well-being and stay-at-home experiences during the Coronavirus pandemic in May-July 2020 Episode 3 Home schooling experiences This final movie presents some predictors of children’s well-being related to home schooling: the quantity, difficulty andjavascript:$('next-but').click(); content of homework. The children’s experiences varied and not everybody coped well. The aim of the project COVID-Kids is to explore children’s well-being and stay-at-home experiences during the Coronavirus pandemic in May-July 2020 [less ▲]

Detailed reference viewed: 28 (0 UL)
See detailFünf Filme des Projekts COVID-Kids: 1 Hört den Kindern und Jugendlichen zu; 2. Die Angst krank zu werden; 3. Erfahrungen mit der Schule zu Hause
Kirsch, Claudine UL; Engel de Abreu, Pascale UL; Neumann, Sascha et al

Learning material (2021)

COVID-Kids Das Ziel des Projekts COVID-Kids ist es, das Wohlbefinden und die täglichen Erfahrungen der Kinder während der Coronavirus-Pandemie im Mai-Juli 2020 zu erforschen. Film 1 Hört den Kindern und ... [more ▼]

COVID-Kids Das Ziel des Projekts COVID-Kids ist es, das Wohlbefinden und die täglichen Erfahrungen der Kinder während der Coronavirus-Pandemie im Mai-Juli 2020 zu erforschen. Film 1 Hört den Kindern und Jugendlichen zu Dieser erste Film stellt das Projekt COVID-Kids sowie einige Ergebnisse vor. Es zeigt vier Kinder, die unterschiedliche Erfahrungen in der Pandemie machten. Während einige Kinder die Zeit zu Hause stressig oder langweilig fanden, genossen andere die schöne Zeit mit der Familie. Das Ziel des Projekts COVID-Kids ist es, das Wohlbefinden und die täglichen Erfahrungen der Kinder während der Coronavirus-Pandemie im Mai-Juli 2020 zu erforschen. Film 2 Die Angst krank zu werden Vier Kinder sprechen über die Angst, krank zu werden. Während zwei keine Angst hatten, war ein Kind besorgt, dass ein Familienmitglied krank wird und ein anderes erlebte, wie Erwachsene meckerten, weil sie glaubten, es sei zu nahegekommen. Weitere Ergebnisse des Projekts werden vorgestellt. Das Ziel des Projekts COVID-Kids ist es, das Wohlbefinden und die täglichen Erfahrungen der Kinder während der Coronavirus-Pandemie im Mai-Juli 2020 zu erforschen. Film 3 Erfahrungen mit der Schule zu Hause In diesem letzten Film werden einige Prädiktoren für das Wohlbefinden der Kinder im Zusammenhang mit dem Unterricht zu Hause vorgestellt: die Menge, der Schwierigkeitsgrad und der Inhalt der Schulaufgaben. Die Erfahrungen der Kinder waren unterschiedlich und nicht alle kamen gut damit zurecht. Das Ziel des Projekts COVID-Kids ist es, das Wohlbefinden und die täglichen Erfahrungen der Kinder während der Coronavirus-Pandemie im Mai-Juli 2020 zu erforschen. [less ▲]

Detailed reference viewed: 27 (0 UL)
Full Text
Peer Reviewed
See detailJoint Symbol Level Precoding and Combining for MIMO-OFDM Transceiver Architectures Based on One-Bit DACs and ADCs
Domouchtsidis, Stavros UL; Tsinos, Christos UL; Chatzinotas, Symeon UL et al

in IEEE Transactions on Wireless Communications (2021), 20(7), 4601-4613

Herein, a precoding scheme is developed for orthogonal frequency division multiplexing (OFDM) transmission in multiple-input multiple-output (MIMO) systems that use one-bit digital-to-analog converters ... [more ▼]

Herein, a precoding scheme is developed for orthogonal frequency division multiplexing (OFDM) transmission in multiple-input multiple-output (MIMO) systems that use one-bit digital-to-analog converters (DACs) and analog-to-digital converters (ADCs) at the transmitter and receiver, respectively, as a means to reduce the power consumption. Two different one-bit architectures are presented. In the first, a single user MIMO system is considered where the DACs and ADCs of the transmitter and the receiver are assumed to be one-bit and in the second, a network of analog phase shifters is added at the receiver as an additional analog-only processing step with the view to mitigate some of the effects of coarse quantization. The precoding design problem is formulated and then split into two NP-hard optimization problems, which are solved by an algorithmic solution based on the Cyclic Coordinate Descent (CCD) framework. The design of the analog post-coding matrix for the second architecture is decoupled from the precoding design and is solved by an algorithm based on the alternating direction method of multipliers (ADMM). Numerical results show that the proposed precoding scheme successfully mitigates the effects of coarse quantization and the proposed systems achieve a performance close to that of systems equipped with full resolution DACs/ADCs. [less ▲]

Detailed reference viewed: 39 (1 UL)
Full Text
Peer Reviewed
See detailSwarm-based counter UAV defense system
Brust, Matthias R. UL; Danoy, Grégoire UL; Stolfi Rosso, Daniel UL et al

in Discover Internet of Things (2021), 1(1),

Unmanned Aerial Vehicles (UAVs) have quickly become one of the promising Internet-of-Things (IoT) devices for smart cities. Thanks to their mobility, agility, and onboard sensors'customizability, UAVs ... [more ▼]

Unmanned Aerial Vehicles (UAVs) have quickly become one of the promising Internet-of-Things (IoT) devices for smart cities. Thanks to their mobility, agility, and onboard sensors'customizability, UAVs have already demonstrated immense potential for numerous commercial applications. The UAVs expansion will come at the price of a dense, high-speed and dynamic traffic prone to UAVs going rogue or deployed with malicious intent. Counter UAV systems (C-UAS) are thus required to ensure their operations are safe. Existing C-UAS, which for the majority come from the military domain, lack scalability or induce collateral damages. This paper proposes a C-UAS able to intercept and escort intruders. It relies on an autonomous defense UAV swarm, capable of self-organizing their defense formation and to intercept the malicious UAV. This fully localized and GPS-free approach follows a modular design regarding the defense phases and it uses a newly developed balanced clustering to realize the intercept- and capture-formation. The resulting networked defense UAV swarm is resilient to communication losses. Finally, a prototype UAV simulator has been implemented. Through extensive simulations, we demonstrate the feasibility and performance of our approach. [less ▲]

Detailed reference viewed: 57 (14 UL)
Full Text
See detailEvaluation of erosion inside AWJC Nozzle by 6-way coupling of DEM+CFD+FEM using preCICE
Adhav, Prasad UL; Besseron, Xavier UL; Rousset, Alban et al

Presentation (2021, February 23)

The objective of this work is to study the particle‐induced erosion within a nozzle for abrasive cutting. So far, the erosion in the nozzle was predicted only through the number of collisions, using only ... [more ▼]

The objective of this work is to study the particle‐induced erosion within a nozzle for abrasive cutting. So far, the erosion in the nozzle was predicted only through the number of collisions, using only a simple DEM+CFD coupling. To improve these predictions, we extend our model to a 6‐way momentum coupling with DEM+CFD+FEM to account for deformations and vibrations in the nozzle. Our prototype uses preCICE to couple 3 numerical solvers: XDEM (for the particle motion), OpenFOAM (for the water jet), and CalculiX (for the nozzle deformation). The OpenFOAM adapter has been adapted to add particles drag, which is modeled as semi‐implicit porosity, implicit and explicit drag terms injected to OpenFOAM solver through fvOptions. This 6‐way coupling between DEM+CFD+FEM brings the simulation of the particle‐laden multiphase flow inside the abrasive cutting nozzle close to the real‐life conditions. Thus opening up opportunities for further investigation and improvement of the Nozzle design. [less ▲]

Detailed reference viewed: 97 (4 UL)
Full Text
Peer Reviewed
See detailThermofield dynamics: Quantum chaos versus decoherence
Xu, Zhenyu; Chenu, Aurélia UL; Prosen, Tomaž et al

in Physical Review. B, Condensed Matter and Materials Physics (2021)

Quantum chaos imposes universal spectral signatures that govern the thermofield dynamics of a many-body system in isolation. The fidelity between the initial and time-evolving thermofield double states ... [more ▼]

Quantum chaos imposes universal spectral signatures that govern the thermofield dynamics of a many-body system in isolation. The fidelity between the initial and time-evolving thermofield double states exhibits as a function of time a decay, dip, ramp, and plateau. Sources of decoherence give rise to a nonunitary evolution and result in information loss. Energy dephasing gradually suppresses quantum noise fluctuations and the dip associated with spectral correlations. Decoherence further delays the appearance of the dip and shortens the span of the linear ramp associated with chaotic behavior. The interplay between signatures of quantum chaos and information loss is determined by the competition among the decoherence, dip, and plateau characteristic times, as demonstrated in the stochastic Sachdev-Ye-Kitaev model. [less ▲]

Detailed reference viewed: 49 (3 UL)
Full Text
Peer Reviewed
See detailEnergy-Efficient Hybrid Symbol-Level Precoding for Large-Scale mmWave Multiuser MIMO Systems
Haqiqatnejad, Alireza UL; Kayhan, Farbod UL; Ottersten, Björn UL

in IEEE Transactions on Communications (2021), 69(5), 3119-3134

We address the symbol-level precoding design problem for the downlink of a multiuser millimeter wave (mmWave) multiple-input multiple-output (MIMO) wireless system where the transmitter is equipped with a ... [more ▼]

We address the symbol-level precoding design problem for the downlink of a multiuser millimeter wave (mmWave) multiple-input multiple-output (MIMO) wireless system where the transmitter is equipped with a large-scale antenna array. The high cost and power consumption associated with the massive use of radio frequency (RF) chains prohibit fully-digital implementation of the precoder, and therefore, we consider a hybrid analog-digital architecture where a small-sized baseband precoder is followed by two successive networks of analog on-off switches and variable phase shifters according to a fully-connected structure. We jointly optimize the digital baseband precoder and the states of the switching network on a symbol-level basis, i.e., by exploiting both the channel state information (CSI) and the instantaneous data symbols, whereas the phase-shifting network is designed only based on the CSI due to practical considerations. Our approach to this joint optimization is to minimize the Euclidean distance between the optimal fully-digital and the hybrid symbol-level precoders. Remarkably, the use of a switching network allows for power-savings in the analog precoder by switching some of the phase shifters off according to the instantaneously optimized states of the switches. Our numerical results indicate that, on average, up to 50 percent of the phase shifters can be switched off. We provide an analysis of energy efficiency by adopting appropriate power dissipation models for the analog precoder, where it is shown that the energy efficiency of precoding can substantially be improved thanks to the phase shifter selection approach, compared to the fully-digital and the state-of-the-art hybrid symbol-level schemes. [less ▲]

Detailed reference viewed: 56 (12 UL)
Full Text
See detailThe Cab Rank Rule: English Barristers in Foreign Courts
Happold, Matthew UL

in New Law Journal (2021)

When the cab rank rule is no longer a defense: considerations when accepting instructions overseas. Barristers have hit the headlines recently for taking instructions on controversial cases in foreign ... [more ▼]

When the cab rank rule is no longer a defense: considerations when accepting instructions overseas. Barristers have hit the headlines recently for taking instructions on controversial cases in foreign jurisdictions, to which the cab rank rule obliging a barrister to accept any work does not apply. When accepting such cases, barristers should bear in mind whether those foreign proceedings are at odds with their core duties under the Bar Standard Board’s Code of Conduct, particularly in politically sensitive cases. [less ▲]

Detailed reference viewed: 30 (1 UL)
Full Text
Peer Reviewed
See detailMathematical modeling of thermal behavior of single iron ore pellet during heat hardening oxidation
Amani, Hafez; Alamdari, E.K; Ale Ebrahim, H. et al

in Journal of Thermal Analysis and Calorimetry (2021)

In this study, a one-dimensional generic model capable of being integrated with reactor scale models is proposed for a single pellet through solving the transient diferential conservation equations ... [more ▼]

In this study, a one-dimensional generic model capable of being integrated with reactor scale models is proposed for a single pellet through solving the transient diferential conservation equations. Predicted results comparison with the experimental data showed close agreement. In addition, the model was used to investigate the relevance of physical characteristics of pellet, reacting gas composition, difusion factors, and prevailing regime. It was found that the pure magnetite pellet could achieve a temperature rise of about 245 K at oxygen concentration of 40 vol.%, whereas the maximum temperature diference inside the pellet was approximately 24 K. Moreover, increasing pellet size, the maximum attainable temperature reached a peak and then leveled out. Furthermore, by decreasing the pore diameter, the pellet size with peak temperature shifted to the smaller pellet sizes. Analyzing the numerical results also showed that for the small pellet sizes, shortening the difusion path leads to the spreading of the reaction interface. The modeling methodology herein can be applied to any particulate processes and is not limited to the aforementioned case. [less ▲]

Detailed reference viewed: 34 (2 UL)