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See detailMeasuring Macroeconomic Tail Risk
Penasse, Julien UL

Presentation (2019, December 05)

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See detailOn partial-sum processes of ARMAX residuals
Holcblat, Benjamin UL; Gronneberg, Steffen

in Annals of Statistics (2019), 47(6), 3216-3243

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See detailPerformance and Complexity Tradeoffs of Several Constellations for Non Coherent Massive MIMO
Monzon Baeza, Victor UL; Garcia Armada, Ana

in 22nd International Symposium on Wireless Personal Multimedia Communications (WPMC) (2019, November)

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See detailDIGITAL TWINNING FOR REAL-TIME SIMULATION
Mazier, Arnaud UL; Deshpande, Saurabh UL; Bordas, Stéphane UL

Poster (2019, November)

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See detailLanguage and (Im)mobility as a Struggle: Cape Verdean Trajectories into Luxembourg
Tavares, Bernardino UL; Juffermans, Kasper

in Multilingualism, (Im)mobilities and Spaces of Belonging (2019)

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See detailMeasuring Macroeconomic Tail Risk
Penasse, Julien UL

Presentation (2019, October 03)

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See detailSocial context hinders humans but not ravens in a short-term memory task
Bobrowicz, Katarzyna UL; Osvath, Mathias

in Ethology (2019)

Using resources shared within a social group—either in a cooperative or a competitive way—requires keeping track of own and others’ actions, which, in turn, requires well-developed short-term memory ... [more ▼]

Using resources shared within a social group—either in a cooperative or a competitive way—requires keeping track of own and others’ actions, which, in turn, requires well-developed short-term memory. Although short-term memory has been tested in social mammal species, little is known about this capacity in highly social birds, such as ravens. We compared ravens (Corvus corax) with humans in spatial tasks based on caching, which required short-term memory of one's own and of others’ actions. Human short-term memory has been most extensively tested of all social mammal species, hence providing an informative benchmark for the ravens. A recent study on another corvid species (Corvus corone) suggests their capacity to be similar to the humans’, but short-term memory skills have, to date, not been compared in a social setting. We used spatial setups based on caches of foods or objects, divided into individual and social conditions with two different spatial arrangements of caches (in a row or a 3 × 3 matrix). In each trial, a set of three up to nine caches was presented to an individual that was thereafter allowed to retrieve all items. Humans performed better on average across trials, but their performance dropped, when they had to keep track of partner's actions. This differed in ravens, as keeping track of such actions did not impair their performance. However, both humans and ravens demonstrated more memory-related mistakes in the social than in the individual conditions. Therefore, whereas both the ravens’ and the humans’ memory suffered in the social conditions, the ravens seemed to deal better with the demands of these conditions. The social conditions had a competitive element, and one might speculate that ravens’ memory strategies are more attuned to such situations, in particular in caching contexts, than is the case for humans. [less ▲]

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See detailTechnical report on data protection and privacy in smart ICT: Internet of Things: Gap analysis between scientific research and technical standardisation: Gap analysis Internet of Things
Samir Labib, Nader UL; Brust, Matthias R. UL; Danoy, Grégoire UL et al

in Technical report on data protection and privacy in smart ICT (2019), 1

With the emergence of new digital trends like the Internet of Things (IoT), more industry actors and technical committees pursue research in utilizing such technologies as they promise better and ... [more ▼]

With the emergence of new digital trends like the Internet of Things (IoT), more industry actors and technical committees pursue research in utilizing such technologies as they promise better and optimized management, improved energy efficiency and better quality living by facilitating a magnitude of value-added services. However, as communication, sensing and actuation become increasingly sophisticated, such promising data-driven IoT systems generate, process, and exchange larger amounts of data, some of which is privacy-sensitive and security-critical. The sustained increase in number of connected devices, catalyzed by IoT, affirms the importance of addressing data protection, privacy and security challenges, as indices of trust, to achieve market acceptance. This consequently, emphasizes the need of a solid technical and regulatory foundation to ensure trustworthiness within the IoT ecosystem. The goal of this study is to first introduce the concept of trustworthiness in IoT with its main pillars, data protection, privacy and security, and then analyze developments in research and standardization for each of these. The study presents a gap analysis on data protection, privacy and security between research and standardization, throughout which the use case of Unmanned Aerial Vehicles (UAVs) is referred to, as a promising value-added service example of mobile IoT devices. The study concludes with suggestions for future research and standardization in order to address the identified gaps. [less ▲]

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See detail‘The EU’s Approach towards Investment Dispute Settlement
Garcia Olmedo, Javier UL

Speeches/Talks (2019)

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See detailNationality of Claim: Investment Arbitration
Garcia Olmedo, Javier UL

in Max Planck Encyclopedia of International Procedural Law [MPEiPro] (2019)

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See detailRefugee Mobility: Evidence from Phone Data in Turkey
Beine, Michel UL; Bertinelli, Luisito UL; Cömertpay, Rana UL et al

in Salah, Albert Ali; Pentland, Alex; Lepri, Bruno (Eds.) et al Guide to Mobile Data Analytics in Refugee Scenarios: The 'Data for Refugees Challenge' Study (2019)

Our research report employs the D4R data and combines it with several <br />other sources to study one of the multiple aspects of integration of refugees, namely <br />the mobility of refugees across ... [more ▼]

Our research report employs the D4R data and combines it with several <br />other sources to study one of the multiple aspects of integration of refugees, namely <br />the mobility of refugees across provinces in Turkey. In particular, we employ a <br />standard gravity model to empirically estimate a series of determinants of refugee <br />movements. These include the standard determinants such as province characteristics, <br />distances across provinces, levels of income, network effects as well as some <br />refugee-specific determinants such as the presence of refugee camps and the intensity <br />of phone call interaction among refugees. Importantly, we explore the effect <br />of certain categories of news events, notably protests, violence, and asylum grants. <br />Considering news as an indicator of policy implemented at the provincial level, we <br />gain a better understanding as to how policy can facilitate refugee mobility and thus <br />enhance integration. To benchmark our findings, we estimate the same model for the <br />mobility of individuals with a non-refugee status. [less ▲]

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See detailNow is (not yet) the Winter of Our Discontent: The Unfulfilled Promise of Economic and Social Rights in the Fight Against Economic Inequality
Lichuma, Caroline Omari UL

E-print/Working paper (2019)

Material inequality or (extreme) economic inequality has been touted as one of the greatest challenges of the twenty-first century. Wealth is “hemorrhaging upwards” rather than “trickling down.” In a ... [more ▼]

Material inequality or (extreme) economic inequality has been touted as one of the greatest challenges of the twenty-first century. Wealth is “hemorrhaging upwards” rather than “trickling down.” In a world where the rich get richer, the poor get poorer, and the inequality gap in income and wealth continues intensifying at an alarming pace, there exists an “inequality explosion” that threatens the very fabric of our global society. While economic inequality and questions of (re)distribution of wealth and income have traditionally been examined within the spheres of development law and political economy, I argue that a human rights based approach that contains economic and social rights (hereinafter, ESRs) at its core is capable of mitigating economic inequality. International human rights norms enjoy a high level of global legitimacy, as evidenced by the fact that the key human rights instruments have been widely accepted in all regions of the world. 169 States have ratified the International Covenant on Economic, Social and Cultural Rights (hereinafter, ICESCR). Underpinned by universally recognized moral values and reinforced by national and international legal obligations, ESRs therefore provide a compelling normative framework through which material inequality can be addressed. [less ▲]

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See detailMemory for Problem Solving: Comparative Studies in Attention, Working and Long-term Memory
Bobrowicz, Katarzyna UL

Doctoral thesis (2019)

Living in a complex and dynamically changing environment requires accurate and timely behavioural responses that allow for adapting to such changes. Well-developed perceptual systems provide a continuous ... [more ▼]

Living in a complex and dynamically changing environment requires accurate and timely behavioural responses that allow for adapting to such changes. Well-developed perceptual systems provide a continuous flow of abundant and up-to-date information on the changes in the environment, and, thereby, allow for tailoring behavioural responses accordingly. However, issuing any behavioral response would not be possible, if it was not for information processing capacities that link one’s perception and action. Because the information processing capacities of humans and non-human animals are always limited, the available information must be sorted, selected and prioritised at all steps of information processing. The steps of information processing have different names, corresponding to their function. The processes, that support attending to and acquiring the information, belong to attention. The processes, that support working on the acquired input from the environment and comparing it with the information acquired in the past, belong to working memory. And finally, the processes, that supply and update the information acquired in the past for the use in the long term, belong to long-term memory. Attention, working and long-term memory work in concert to harness the flow of information, and to support rapid and flexible adaptation to the changes in the environment. This thesis comprises four empirical papers, in which some aspects of attention, working and long-term memory are compared across five species: the common raven (Corvus corax), the Goffin’s cockatoo (Cacatua goffiniana), the Sumatran orangutan (Pongo abelii), the common chimpanzee (Pan troglodytes) and the human (Homo sapiens sapiens). In the first two studies, chimpanzees, an orangutan, and Goffin’s cockatoos are tested in a novel experimental setup that allows for measuring long-term memory flexibility. Arguably, such flexibility allows for drawing on overlapping past experiences to solve novel problems, even when these experiences conflict with one another. The results suggest that great apes and at least some Goffin’s cockatoos can overcome such conflicts and rely on less salient yet relevant rather than more salient yet irrelevant features of overlapping experiences. In the third study, ravens and humans are tested in a series of novel working memory tasks, completed individually or with a competing partner. Ravens perform better in the social than in the individual tasks, while the opposite is true for humans. Interestingly, ravens seem to handle the increasing difficulty of the task by keeping a steady success rate, perhaps revealing a flexible adaptation to varying demands on working memory in ecological conditions. In the fourth and final study, ravens and humans are tested in another experimental setup, which requires attending to a series of objects. Ravens’ gazes to the objects are half as short as humans’, suggesting a higher speed of perception, and perhaps of cognitive processing. [less ▲]

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See detailFast ECDH Key Exchange Using Twisted Edwards Curves with an Efficiently Computable Endomorphism
Groszschädl, Johann UL; Liu, Zhe UL; Hu, Zhi et al

in Proceedings of the 8th International Workshop on Secure Internet of Things 2019 (SIoT 2019) (2019, September)

It is widely accepted that public-key cryptosystems play a major role in the security arena of the Internet of Things (IoT), but they need to be implemented efficiently to not deplete the scarce resources ... [more ▼]

It is widely accepted that public-key cryptosystems play a major role in the security arena of the Internet of Things (IoT), but they need to be implemented efficiently to not deplete the scarce resources of battery-operated devices such as wireless sensor nodes. This paper describes a highly-optimized software implementation of scalar multiplication for Elliptic Curve Diffie-Hellman (ECDH) key exchange on resource-limited IoT devices that achieves fast execution times along with reasonably small code size and RAM consumption. Our software uses a special class of elliptic curves, namely twisted Edwards curves with an efficiently computable endomorphism similar to that of the so- called Gallant-Lambert-Vanstone (GLV) curves. This allows us to combine the main advantage of the GLV model, which is an efficiently-computable endomorphism to speed up variable-base scalar multiplication, with the fast and complete addition rules of the (twisted) Edwards model. We implemented variable-base scalar multiplication for static ECDH on two such curves, one over a 159-bit and the second over a 207-bit pseudo-Mersenne prime field, respectively, and evaluated their execution time on a 16-bit MSP430F1611 processor. The arithmetic operations in the prime field do not contain operand-dependent conditional statements (in particular no "if-then-else" clauses) and also the scalar multiplication follows a fixed execution path for a given (static) scalar. A variable-base scalar multiplication on curves over the 159 and 207-bit field takes about 2.63 and 4.84 million clock cycles, respectively, on an MSP430F1611 processor. These results compare favorably with the Montgomery ladder on the equivalent Montgomery curves, which is almost 50% slower. [less ▲]

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See detailUne manière de dire "je" : paroles pamphlétaires dans le premier XIXe siècle (1814-1848)
Saintes, Laetitia UL

Doctoral thesis (2019)

La chute de Napoléon, en 1814, marque l’entrée de la France dans un régime d’opinion. Il s’agit là du résultat d’une mutation significative de la culture politique, qui voit le discours sur la chose ... [more ▼]

La chute de Napoléon, en 1814, marque l’entrée de la France dans un régime d’opinion. Il s’agit là du résultat d’une mutation significative de la culture politique, qui voit le discours sur la chose publique gagner l’espace extra-parlementaire, donnant lieu à des formes de discours codifiées opposées à celles du débat politique officiel. Sortant de l’hémicycle pour investir la rue, la parole sur la chose publique change de nature en changeant de lieu d’exercice ; dans ce cadre, le pamphlet de la première moitié du XIXe siècle apparaît comme le catalyseur et le fruit privilégié de cet abandon progressif des formes longues de l’éloquence politique. Suivant les pas de Germaine de Staël, Benjamin Constant et surtout François-René de Chateaubriand, précurseurs de la parole pamphlétaire moderne, Paul-Louis Courier fait du pamphlet une forme de parole codifiée et stabilisée, avec sa rhétorique, ses images et ses protagonistes (le « je » pamphlétaire en particulier). Or la place centrale accordée à la figure de l’auteur pose la question de la légitimité de la pratique polémique, et notamment des stratégies mises en place par les pamphlétaires pour justifier leur entreprise de dénonciation ; c’est à ces interrogations qu’on consacrera notre propos. [less ▲]

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See detailUndergraduate Public History Teaching: How and Why it Can Change University History Training
Cauvin, Thomas UL

in International Public History (2019)

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See detailTowards Indigenous Social Work practice: Addressing professional challenges in working with Homeless Greenlanders in Aalborg, Denmark
Edwards, Jordanne UL; Valéria Montes D’Oco, Lisarb; Melaku Tefera, Gashaye et al

in Journal of Indigenous Social Development (2019), 8(1), 19-34

The article discusses the challenges within social work practices with the homeless Greenlandic population in Aalborg, Denmark, based on a case study at the Aalborg University. Interviews were conducted ... [more ▼]

The article discusses the challenges within social work practices with the homeless Greenlandic population in Aalborg, Denmark, based on a case study at the Aalborg University. Interviews were conducted with social workers from service organizations across the Aalborg municipality. The findings are analyzed by drawing on a theoretical framework which addresses the role of social workers and social service institutions that support homeless Greenlanders to adjust to life in Denmark. Indigenous social work is presented as an alternative practice method to mitigate existing challenges within the field and to create culturally appropriate services. The findings revealed that cultural differences pose a fundamental challenge to the effective helping process of homeless Greenlanders in social work practices. Plausible recommendations for practice are identified. [less ▲]

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