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See detailSDN-based Pseudonym-Changing Strategy for Privacy Preservation in Vehicular Networks
Boualouache, Abdelwahab UL; Soua, Ridha UL; Engel, Thomas UL

in 15th International Conference on Wireless and Mobile Computing, Networking and Communications (WiMob'19) (2019, October)

The pseudonym-changing approach is the de-factolocation privacy solution proposed by security standards toensure that drivers are not tracked during their journey. SeveralPseudonym Changing Strategies ... [more ▼]

The pseudonym-changing approach is the de-factolocation privacy solution proposed by security standards toensure that drivers are not tracked during their journey. SeveralPseudonym Changing Strategies (PCSs) have been proposed tosynchronize Pseudonym Changing Processes (PCPs) between con-nected vehicles. However, most of the existing strategies are static,rigid and do not adapt to the vehicles’ context. In this paper, weexploit the Software Defined Network (SDN) paradigm to proposea context-aware pseudonym changing strategy (SDN-PCS) whereSDN controllers orchestrate the dynamic update of the securityparameters of the PCS. Simulation results demonstrate that SDN-PCS strategy outperforms typical static PCSs to perform efficientPCPs and protect the location privacy of vehicular network users [less ▲]

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See detailRemixed und reloaded: Der Chor und das (neue) Volkstheater
Bloch, Natalie UL; Tropper, Elisabeth UL

Presentation (2019, October)

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See detailThree models of flexible talent management
Usanova, Ksenia; Geraudel, Mickaël UL; D'Armagnac, Sophie et al

Scientific Conference (2019, September 30)

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See detailHow To Attract And Retain Talents In Not-For-Profit Organizations?
Usanova, Ksenia; Telitsina, Aleksandra; Geraudel, Mickaël UL

Scientific Conference (2019, September 30)

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See detailTHE MARKET SKEWNESS-RETURN RELATIONSHIP, Plenary Talk
Lehnert, Thorsten UL

Scientific Conference (2019, September 25)

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See detailBODYFITR: Robust Automatic 3D Human Body Fitting
Saint, Alexandre Fabian A UL; Shabayek, Abd El Rahman UL; Cherenkova, Kseniya UL et al

in Proceedings of the 2019 IEEE International Conference on Image Processing (ICIP) (2019, September 22)

This paper proposes BODYFITR, a fully automatic method to fit a human body model to static 3D scans with complex poses. Automatic and reliable 3D human body fitting is necessary for many applications ... [more ▼]

This paper proposes BODYFITR, a fully automatic method to fit a human body model to static 3D scans with complex poses. Automatic and reliable 3D human body fitting is necessary for many applications related to healthcare, digital ergonomics, avatar creation and security, especially in industrial contexts for large-scale product design. Existing works either make prior assumptions on the pose, require manual annotation of the data or have difficulty handling complex poses. This work addresses these limitations by providing a novel automatic fitting pipeline with carefully integrated building blocks designed for a systematic and robust approach. It is validated on the 3DBodyTex dataset, with hundreds of high-quality 3D body scans, and shown to outperform prior works in static body pose and shape estimation, qualitatively and quantitatively. The method is also applied to the creation of realistic 3D avatars from the high-quality texture scans of 3DBodyTex, further demonstrating its capabilities. [less ▲]

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See detailUpdate Internationales und Europäisches IT-Steuerrecht
Sinnig, Julia UL

Presentation (2019, September 14)

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See detailLaurent Menager (1835-1902), der musikalische Botschafter Luxemburgs im 19. Jahrhundert
Sagrillo, Damien UL

Conference given outside the academic context (2019)

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See detailIncome Inequality and the Strength of the Origins-Health Gradient in 20 European Countries
Chauvel, Louis UL; Bar-Haim, Eyal UL; Leist, Anja UL

Scientific Conference (2019, September 12)

Health is determined by socio-economic position not only of the individual, but also by that of their parents. The intergenerational transmission of health via parental socioeconomic status is suggested ... [more ▼]

Health is determined by socio-economic position not only of the individual, but also by that of their parents. The intergenerational transmission of health via parental socioeconomic status is suggested to vary according to contextual factors such as income inequality. Earlier studies with a comparative perspective had a limited number of countries available. This study uses 20 countries at up to five waves from the European Social Survey (2008-2016) and SWIID in order to examine the extent to which income inequality is related to the origins-health gradient. The higher the income inequality of a given country and year, the stronger the origins-health gradient. Contrary to earlier findings, this association can be fully explained by intergenerational transmission of status, i.e. education. Implications of this finding are that health is largely determined by educational attainment and associated health behaviors, giving societal context a less prominent role than earlier studies suggested. [less ▲]

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See detailA comparison between conventional Earth Observation Satellites and CubeSats; Requirements, Capabilities and Data Quality
Backes, Dietmar UL; Hassani, Saif Alislam UL; Teferle, Felix Norman UL et al

Scientific Conference (2019, September 11)

From its early beginning as an educational tool in 1999, cubesats have evolved into a popular platform for technology demonstrations and scientific instruments. Ideas and innovations sparked from an ... [more ▼]

From its early beginning as an educational tool in 1999, cubesats have evolved into a popular platform for technology demonstrations and scientific instruments. Ideas and innovations sparked from an enthusiastic community led to the development of new Earth Observation (EO) technology concepts based on large constellations of satellites with high-resolution optical imagers previously considered as infeasible. Probably the most significant constellation today is deployed by Planet who are currently operating a fleet larger than 120 3U Dove satellites, which provide an imaging service with up to 3m Ground Sample Distance (GSD). The number of low-cost EO Cubesat systems is constantly increasing. However, for a number of reasons there still seems to be a reluctance to use such data for many EO applications. A better understanding of the capabilities of the current generation of small Cubesats compared to the traditional well-established bigger operational missions of high and medium resolution EO satellites is required. What are the critical capabilities and quality indicators? Due to the limited size and weight of Cubesats, critical system components, e.g. for navigation and communication, always compete with operational payloads such as optical camera/sensor systems. A functional EO system requires balanced payload, which provides adequate navigational capabilities, that match the requirements of the optical imagers (camera) deployed with the system. This study reviews the current performance and capabilities of Cubesats for optical EO and compares them to the capabilities of conventional, dedicated high and medium resolution EO systems. We summarise key performance parameters and quality indicators to evaluate the difference between the systems. An empirical study compares recent very high-resolution (VHR) imagery from big EO satellite missions with available images from Cubesats for the use case in disaster monitoring. Small and agile Nanosatellites or Cubesats already show remarkable performance. Although it is not expected that their performance and capability will match those of current bigger EO satellite missions, they are expected to provide a valuable tool for EO and remote sensing, in particular for downstream industry applications. [less ▲]

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See detailImplicit attitudes and stereotypes concerning male and female ethnic minority students
Pit-Ten Cate, Ineke UL; Krischler, Mireille UL

Scientific Conference (2019, September 10)

Stereotypes and attitudes influence behavior and hence contribute to the integration of students from different backgrounds. Stereotypes reflect beliefs about the members of social groups (Fiske & Taylor ... [more ▼]

Stereotypes and attitudes influence behavior and hence contribute to the integration of students from different backgrounds. Stereotypes reflect beliefs about the members of social groups (Fiske & Taylor, 1991) and are associated with expectations, which in turn effect perception and judgments (Ferguson, 2003). Person perceptions- and judgments are however also affected by evaluations of objects (Sanbonmatsu & Fazio, 1990). Based on people´s stereotypical beliefs and associated thoughts and feelings, specific behavioral intentions develop and hence both may be pivotal for the level of acceptance or rejection of others. Research shows that stigmatization based on ethnicity can provide a barrier in terms of both social integration (MENJE, 2015) and educational equity (Gabel, et al., 2009). The current study aimed to assess young peoples´ implicit attitudes and stereotypes concerning male and female students from different ethnic backgrounds (German vs. Turkish). Implicit attitudes were measured using an implicit association task (IAT; Greenwald, et al., 2003). First names were used as a proxy for the ethnic background of the student. Participants (N=98) were randomly divided in two groups, completing either an IAT-boys version or an IAT-girls version. Stereotypes, in terms of students´ academic engagement were assessed using a questionnaire (Hachfeld, et al., 2012). Mean IAT-D scores for boys and girls did not differ, t(89)=1.05, p=.30. The IAT-D score for the whole sample (M=0.33, SD=1.28) was significantly different from zero, t(90)=2.46, p=.02, d=0.26, reflecting more negative implicit attitudes toward students with Turkish roots. Participants did not express differential stereotypical beliefs regarding the students´ academic engagement based on students´ ethnic background (i.e., subscale scores were significantly lower than the mean of the scale, t(88)=6.00, p<.001, d=0.64). No correlation was found between implicit attitudes and stereotypical beliefs (r=.12, n.s.). People´s implicit attitudes in favor of students from ethnic majorities may result in differential social interactions with students from different backgrounds (less acceptance of students with ethnic minority backgrounds). The dissociation between implicit attitudes and explicit stereotypical beliefs may reflect the social sensitivity of the relationship between students´ background and educational opportunities. [less ▲]

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See detailUnravelling the border-facade of France : a multi-level modelling of cross-border commuting
Pigeron-Piroth, Isabelle UL; Caruso, Geoffrey UL; Le Texier, Marion

in Caruso, Geoffrey; Gerber, Philippe; Jones, Catherine (Eds.) et al 21st European Colloquium on Theoretical and Quantitative Geography (ECTQG), Book of Abstracts, Mondorf-las-Bains, 5-9 septembre 2019 (2019, September 09)

Given its central position in Western Europe, France is the European country where cross-border commuting is most intense. Over 350000 residents cross the national border everyday to go to work. Cross ... [more ▼]

Given its central position in Western Europe, France is the European country where cross-border commuting is most intense. Over 350000 residents cross the national border everyday to go to work. Cross-border commuting raises a lot of concerns for planners on both side of each border, especially for provisioning transport infrastructure and local public services but also because it impacts land and housing markets, especially when salary differentials are high. While there is a lot of research about the daily functioning of specific borders (e.g. France-Switzerland or France-Luxembourg), generalization is lacking and spatial heterogeneities impede our understanding of the very determinants of cross-border commuting, such as the role of benefits differentials, transport costs and distance, or the relative availability of jobs at residential places and across the border. Further, these effects are most likely mediated differently by the socio-demographic characteristics of workers, their employment sector, and the quality of their residential environment at large. This suggests that an individual approach and a spatially detailed approach is needed, which contrasts sharply with the fact that most European-wide studies of cross-border commuting are conducted at very aggregated spatial scales (NUTS 2 or 3). [less ▲]

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See detailIntegrity and Confidentiality Problems of Outsourcing
Pejo, Balazs UL

Doctoral thesis (2019)

Cloud services enable companies to outsource data storage and computation. Resource-limited entities could use this pay-per-use model to outsource large-scale computational tasks to a cloud-service ... [more ▼]

Cloud services enable companies to outsource data storage and computation. Resource-limited entities could use this pay-per-use model to outsource large-scale computational tasks to a cloud-service-provider. Nonetheless, this on-demand network access raises the issues of security and privacy, which has become a primary concern of recent decades. In this dissertation, we tackle these problems from two perspectives: data confidentiality and result integrity. Concerning data confidentiality, we systematically classify the relaxations of the most widely used privacy preserving technique called Differential Privacy. We also establish a partial ordering of strength between these relaxations and enlist whether they satisfy additional desirable properties, such as composition and privacy axioms. Tackling the problem of confidentiality, we design a Collaborative Learning game, which helps the data holders to determine how to set the privacy parameter based on economic aspects. We also define the Price of Privacy to measure the overall degradation of accuracy resulting from the applied privacy protection. Moreover, we develop a procedure called Self-Division, which bridges the gap between the game and real-world scenarios. Concerning result integrity, we formulate a Stackelberg game between outsourcer and outsourcee where no absolute correctness is required. We provide the optimal strategies for the players and perform a sensitivity analysis. Furthermore, we extend the game by allowing the outsourcer no to verify and show its Nash Equilibriums. Regarding integrity verification, we analyze and compare two verification methods for Collaborative Filtering algorithms: the splitting and the auxiliary data approach. We observe that neither methods provides a full solution for the raised problem. Hence, we propose a solution, which besides outperforming these is also applicable to both stage of the algorithms. [less ▲]

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See detailEnrichment of damaging missense variants in genes related with axonal guidance signalling in sporadic Meniere’s disease
Gallego-Martinez, Alvaro; Requena, Teresa; Roman-Naranjo, Pablo et al

in Journal of Medical Genetics (2019)

INTRODUCTION: Meniere's disease (MD) is a rare inner ear disorder with a significant genetic contribution defined by a core phenotype: episodic vertigo, sensorineural hearing loss and tinnitus. It has ... [more ▼]

INTRODUCTION: Meniere's disease (MD) is a rare inner ear disorder with a significant genetic contribution defined by a core phenotype: episodic vertigo, sensorineural hearing loss and tinnitus. It has been mostly described in sporadic cases, familial cases being around 10% of the observed individuals. It is associated with an accumulation of endolymph in the inner ear, but the molecular underpinnings remain largely unknown. The main molecular pathways showing higher differentially expressed genes in the supporting cells of the inner ear are related to cochlea-vestibular innervation, cell adhesion and leucocyte extravasation. In this study, our objective is to find a burden of rare variants in genes that interact with the main signalling pathways in supporting cells of the inner ear in patients with sporadic MD. METHODS: We designed a targeted-sequencing panel including genes related with the main molecular pathways in supporting cells and sequenced 860 Spanish patients with sporadic MD. Variants with minor allele frequencies <0.1 in the gene panel were compared with three independent reference datasets. Variants were classified as loss of function, missense and synonymous. Missense variants with a combined annotation-dependent depletion score of >20 were classified as damaging missense variants. RESULTS: We have observed a significant burden of damaging missense variants in few key genes, including the NTN4 gene, associated with axon guidance signalling pathways in patients with sporadic MD. We have also identified active subnetworks having an enrichment of rare variants in sporadic MD. CONCLUSION: The burden of missense variants in the NTN4 gene suggests that axonal guidance signalling could be a novel pathway involved in sporadic MD. [less ▲]

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See detailSeeking 'truth' after devastating, multi-layered conflict: The complex case of transitional justice in South Sudan
Owiso, Owiso UL

Presentation (2019, September 07)

Barely three years after seceding from Sudan following five decades of armed struggle against systematic marginalisation and oppression, South Sudan descended into a protracted civil war from 15 December ... [more ▼]

Barely three years after seceding from Sudan following five decades of armed struggle against systematic marginalisation and oppression, South Sudan descended into a protracted civil war from 15 December 2013 when President Salva Kiir and Deputy President Riek Machar fell out. The signing of the Agreement on the Resolution of the Conflict in the Republic of South Sudan on 17 August 2015 after almost two years of devastating conflict thus signalled hope for the beginning of the long process of reconciliation and social (re)construction in South Sudan. This hope was, however, short-lived when, barely eleven months after the signing of the Agreement, Kiir and Machar fell out again and the civil war continued. Again, the concerted efforts of the Inter-Governmental Authority on Development, supported by the African Union and other international stakeholders, secured a recommitment to the 2015 Agreement by Kiir, Machar and a host of other splinter rebel groups on 12 September 2018 in the form of the Revitalised Agreement on the Resolution of the Conflict in the Republic of South Sudan (R-Agreement). The conflict was characterised by widespread and systematic violations of human rights and humanitarian law possibly amounting to international crimes committed by all parties to the conflict, most of which have been painstakingly documented by multiple entities including the African Union Commission of Inquiry into South Sudan, the African Committee of Experts on the Rights and Welfare of the Child, the United Nations High Commissioner for Human Rights, the United Nations Commission on Human Rights in South Sudan, the UN Special Rapporteur on the Human Rights of internally Displaced Persons and civil society organisations. In order to deal with the legacy of the conflict, the R-Agreement provides a transitional justice roadmap for South Sudan which includes proposals for the creation of the Commission for Truth, Reconciliation and Healing (the Commission), the Compensation and Reparation Authority and the Hybrid Court for South Sudan (Hybrid Court). The objective of this paper is to examine the potential of the Commission to contribute towards sustainable transitional justice solutions in South Sudan, based on contemporary standards and practice of transitional justice. The paper adopts (i) a historical approach in order to understand the context of truth-seeking in South Sudan and history’s influence on the R-Agreement’s transitional justice provisions, and (ii) descriptive and analytical approaches in examining the proposed design and operation of the Commission. The paper also draws inspiration from truth-seeking experiences in other countries and explores possibilities for learning. Notably, South Sudan is still restive and as such, the analysis in this paper is set against the background of a society caught in the uncertain and ambiguous state between conflict and post-conflict. Therefore, while exploring its key objective, the paper also grapples with the complex question of when a society can be considered to be ‘ripe’ for transitional justice intervention. [less ▲]

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