Last 7 days
Bookmark and Share    
Full Text
Peer Reviewed
See detailRevisiting Deniability in Quantum Key Exchange via Covert Communication and Entanglement Distillation
Atashpendar, Arash UL; Policharla, Guru Vamsi; Roenne, Peter UL et al

in Secure IT Systems, 23rd Nordic Conference, NordSec 2018 (in press)

We revisit the notion of deniability in quantum key exchange (QKE), a topic that remains largely unexplored. In the only work on this subject by Donald Beaver, it is argued that QKE is not necessarily ... [more ▼]

We revisit the notion of deniability in quantum key exchange (QKE), a topic that remains largely unexplored. In the only work on this subject by Donald Beaver, it is argued that QKE is not necessarily deniable due to an eavesdropping attack that limits key equivocation. We provide more insight into the nature of this attack and how it extends to other constructions such as QKE obtained from uncloneable encryption. We then adopt the framework for quantum authenticated key exchange, developed by Mosca et al., and extend it to introduce the notion of coercer-deniable QKE, formalized in terms of the indistinguishability of real and fake coercer views. Next, we apply results from a recent work by Arrazola and Scarani on covert quantum communication to establish a connection between covert QKE and deniability. We propose DC-QKE, a simple deniable covert QKE protocol, and prove its deniability via a reduction to the security of covert QKE. Finally, we consider how entanglement distillation can be used to enable information-theoretically deniable protocols for QKE and tasks beyond key exchange. [less ▲]

Detailed reference viewed: 54 (8 UL)
Peer Reviewed
See detailAgency, materiality, and relations in intra-action in a kindergarten science investigation
Haus, Jana; Siry, Christina UL

in Milne, Catherine; Scantlebury, Kate (Eds.) Material practice and materiality in science education (in press)

Detailed reference viewed: 9 (0 UL)
Full Text
Peer Reviewed
See detailThe English and German versions of the Lesbian, Gay, and Bisexual Identity Scale: Establishing measurement invariance across nationality and gender groups
Niepel, Christoph UL; Greiff, Samuel UL; Mohr, Jonathan et al

in Psychology of Sexual Orientation and Gender Diversity (in press)

Detailed reference viewed: 2 (0 UL)
Full Text
Peer Reviewed
See detailDoes cargo matter? The impact of air cargo operations on departure on-time performance for combination carriers
Lange, Anne UL

in Transportation Research. Part A, Policy and Practice (in press)

Detailed reference viewed: 12 (0 UL)
Full Text
Peer Reviewed
See detailSchool Attitude and Perceived Teacher Acceptance: Developmental Trajectories, Temporal Relations, and Gender Differences
Arens, Anne Katrin; Niepel, Christoph UL

in British Journal of Educational Psychology (in press)

Detailed reference viewed: 2 (0 UL)
See detailCritical voices in science education research: Narratives of academic journeys
Bazzul, Jesse; Siry, Christina UL

Book published by Sense / Brill (in press)

Detailed reference viewed: 13 (1 UL)
Full Text
Peer Reviewed
See detailLet’s Open the Decision-Making Umbrella: A Framework for Conceptualizing and Assessing Features of Impaired Decision Making in Addiction
Rochat, Lucien; Maurage, Pierre; Heeren, Alexandre et al

in Neuropsychology Review (in press)

Decision-making impairments play a pivotal role in the emergence and maintenance of addictive disorders. However, a sound conceptualization of decision making as an umbrella construct, encompassing its ... [more ▼]

Decision-making impairments play a pivotal role in the emergence and maintenance of addictive disorders. However, a sound conceptualization of decision making as an umbrella construct, encompassing its cognitive, affective, motivational, and physiological subcomponents, is still lacking. This prevents an efficient evaluation of the heterogeneity of decision-making impairments and the development of tailored treatment. This paper thus unfolds the various processes involved in decision making by adopting a critical approach of prominent dual- or triadic-process models, which postulate that decision making is influenced by the interplay of impulsive-automatic, reflective-controlled, and interoceptive processes. Our approach also focuses on social cognition processes, which play a crucial role in decision making and addictive disorders but were largely ignored in previous dual- or triadic-process models. We propose here a theoretical framework in which a range of coordinated processes are first identified on the basis of their theoretical and clinical relevance. Each selected process is then defined before reviewing available results underlining its role in addictive disorders (i.e., substance use, gambling, and gaming disorders). Laboratory tasks for measuring each process are also proposed, initiating a preliminary process-based decision-making assessment battery. This original approach may offer an especially informative view of the constitutive features of decision making impairments in addiction. As prior research has implicated these features as risk factors for the development and maintenance of addictive disorders, our processual approach sets the scene for novel and transdiagnostic experimental and applied research avenues [less ▲]

Detailed reference viewed: 25 (1 UL)
Full Text
Peer Reviewed
See detailThe XDEM Multi-physics and Multi-scale Simulation Technology: Review on DEM-CFD Coupling, Methodology and Engineering Applications
Peters, Bernhard UL; Baniasadi, Maryam UL; Baniasadi, Mehdi UL et al

in Particuology (in press)

The XDEM multi-physics and multi-scale simulation platform roots in the Ex- tended Discrete Element Method (XDEM) and is being developed at the In- stitute of Computational Engineering at the University ... [more ▼]

The XDEM multi-physics and multi-scale simulation platform roots in the Ex- tended Discrete Element Method (XDEM) and is being developed at the In- stitute of Computational Engineering at the University of Luxembourg. The platform is an advanced multi- physics simulation technology that combines flexibility and versatility to establish the next generation of multi-physics and multi-scale simulation tools. For this purpose the simulation framework relies on coupling various predictive tools based on both an Eulerian and Lagrangian approach. Eulerian approaches represent the wide field of continuum models while the Lagrange approach is perfectly suited to characterise discrete phases. Thus, continuum models include classical simulation tools such as Computa- tional Fluid Dynamics (CFD) or Finite Element Analysis (FEA) while an ex- tended configuration of the classical Discrete Element Method (DEM) addresses the discrete e.g. particulate phase. Apart from predicting the trajectories of individual particles, XDEM extends the application to estimating the thermo- dynamic state of each particle by advanced and optimised algorithms. The thermodynamic state may include temperature and species distributions due to chemical reaction and external heat sources. Hence, coupling these extended features with either CFD or FEA opens up a wide range of applications as diverse as pharmaceutical industry e.g. drug production, agriculture food and processing industry, mining, construction and agricultural machinery, metals manufacturing, energy production and systems biology. [less ▲]

Detailed reference viewed: 8 (1 UL)
Full Text
Peer Reviewed
See detailImpact of GPS Antenna Phase Center Models on Zenith Wet Delay and Tropospheric Gradients
Ejigu, Yohannes Getachew; Hunegnaw, Addisu UL; Abraha, Kibrom Ebuy UL et al

in GPS Solutions (in press)

We demonstrate the potential for the Global Positioning System (GPS) to provide highly accurate tropospheric products for use in meteorological applications. Tropospheric products, in particular the wet ... [more ▼]

We demonstrate the potential for the Global Positioning System (GPS) to provide highly accurate tropospheric products for use in meteorological applications. Tropospheric products, in particular the wet delays, are treated as an unknown parameter in GPS processing and are estimated with other parameters such as station coordinates. In this study, we investigate the effects of Phase Center Correction (PCC) models on tropospheric zenith wet delay (ZWD), integrated water vapor (IWV) and gradient products. Two solutions were generated using the GAMIT software over the EUREF Permanent GNSS Network (EPN). The first (reference) solution was derived by applying the International GNSS Service (IGS) type-mean PCC model, while for the second solution PCC models from individual calibrations were used. The solutions were generated identically, except for the PCC model differences. The two solutions were compared, with the assumption that common signals are differenced out. The comparison of the two solutions clearly shows a bias in all tropospheric products, which can be attributed to PCC model deficiencies. Overall, mean biases of ±1.8, ±0.3, ±0.14 and ±0.19 mm are evident in ZWD, IWV, North-South and East-West gradients, respectively. Moreover, the differences between the two solutions show seasonal variations. For all antenna types, the ZWD and IWV differences are dominated by white plus power-law noise, with latter characterizing the low-frequency spectrum. On the other hand, the horizontal gradients exhibit a white plus first order autoregressive noise characteristic with less than 1% white noise. The individual PCC model provides a better fit to an external independent model in terms of gradient estimate and also provides up to 3 % more carrier phase ambiguity resolution. [less ▲]

Detailed reference viewed: 47 (1 UL)
Full Text
Peer Reviewed
See detailManifesto for a European research network into Problematic Usage of the Internet
Fineberg, Naomi A.; Demetrovics, Zsolt; Stein, Dan J. et al

in European Neuropsychopharmacology (in press)

The Internet is now all-pervasive across much of the globe. While it has positive uses (e.g. prompt access to information, rapid news dissemination), many individuals develop Problematic Use of the ... [more ▼]

The Internet is now all-pervasive across much of the globe. While it has positive uses (e.g. prompt access to information, rapid news dissemination), many individuals develop Problematic Use of the Internet (PUI), an umbrella term incorporating a range of repetitive impairing behaviours. The Internet can act as a conduit for, and may contribute to, functionally impairing behaviours including excessive and compulsive video gaming, compulsive sexual behaviour, buying, gambling, streaming or social networks use. There is growing public and National health authority concern about the health and societal costs of PUI across the lifespan. Gaming Disorder is being considered for inclusion as a mental disorder in diagnostic classification systems, and was listed in the ICD-11 version released for consideration by Member States ( http://www.who.int/classifications/icd/revision/timeline/en/ ). More research is needed into disorder definitions, validation of clinical tools, prevalence, clinical parameters, brain-based biology, socio-health-economic impact, and empirically validated intervention and policy ap- proaches. Potential cultural differences in the magnitudes and natures of types and patterns of PUI need to be better understood, to inform optimal health policy and service development. To this end, the EU under Horizon 2020 has launched a new four-year European Cooperation in Science and Technology (COST) Action Programme (CA 16207), bringing together scientists and clinicians from across the fields of impulsive, compulsive, and addictive disorders, to advance networked interdisciplinary research into PUI across Europe and beyond, ultimately seeking to inform regulatory policies and clinical practice. This paper describes nine critical and achievable research priorities identified by the Network, needed in order to advance understanding of PUI, with a view towards identifying vulnerable individuals for early intervention. The network shall enable collaborative research networks, shared multinational databases, multicentre studies and joint publications . [less ▲]

Detailed reference viewed: 9 (0 UL)
Peer Reviewed
See detailBilan
Lejot, Eve UL

in Huemer, Birgit; Lejot, Eve; Deroey, Katrien (Eds.) Academic writing across languages: multilingual and contrastive approaches in higher education (in press)

Detailed reference viewed: 3 (0 UL)
Full Text
Peer Reviewed
See detailWhere the mind cannot dare: a case of addictive use of online pornography and its relationship with childhood trauma.
Wéry; Schimmenti, Adriano; Karila, Laurent et al

in Journal of sex & marital therapy (in press)

Dysfunctional use of cybersex has often been conceptualized as a 'behavioral addiction' sharing common traits with substance addiction. We describe the case of a treatment-seeking man, who displayed ... [more ▼]

Dysfunctional use of cybersex has often been conceptualized as a 'behavioral addiction' sharing common traits with substance addiction. We describe the case of a treatment-seeking man, who displayed addictive use of pornography. The case is presented from two perspectives: (1) a symptom-based approach inspired by the addiction model of excessive sexual behaviors and (2) a process-based approach aimed to identify the psychological processes and risk factors that may foster the development of addiction-like symptoms. This article shows how case conceptualization according to a process-based approach is likely to result in psychological intervention that targets the specific processes and risk factors involved in addictive cybersex use. [less ▲]

Detailed reference viewed: 44 (0 UL)
Full Text
Peer Reviewed
See detailPrevalence and Correlates of Problematic Online Gaming: a Systematic Review of the Evidence Published in Chinese
Long, Jiang; Liu, Tieqiao; Liu, Yueheng et al

in Current Addiction Reports (in press)

Purpose of Review With the ongoing debate about whether problematic online gaming (POG) constitutes a genuine mental disorder, it is important for all available evidence in the field to be accessible. In ... [more ▼]

Purpose of Review With the ongoing debate about whether problematic online gaming (POG) constitutes a genuine mental disorder, it is important for all available evidence in the field to be accessible. In this systematic review, we summarize the numerous results related to POG published in Chinese in order to make them more accessible to the international community. Recent Findings We identified 36 relevant studies published in Chinese (7 epidemiological, 21 related to psychological factors, and 8 related to neurocognitive exploration, involving 362,328 participants in total). According to the literature, the prevalence rates of POG in China range from 3.5 to 17%, which is higher than those reported worldwide. Overall, the data published in Chinese are consistent with the international literature. Some distinctive findings emerged, however, in particular in relation to familial, scholastic, and social factors; cognitive impairments; and functional changes in neural circuits. Summary This review is the first to render available articles on POG in Chinese for the international community, which could contribute to the current debate on the status of POG as a genuine mental health condition. Crucially, findings from the Chinese literature often resulted from studies conducted on large random or clinical samples. This is important because a repeated criticism about the recognition of POG as a genuine disorder is the fact that the evidence-based results rely heavily on convenience samples of nonclinical participants. [less ▲]

Detailed reference viewed: 27 (0 UL)
Full Text
Peer Reviewed
See detailElectrophysiological correlates of emotional crossmodal processing in binge drinking.
Lannoy, Severine; D'Hondt, Fabien; Dormal, Valerie et al

in Cognitive, affective & behavioral neuroscience (in press)

Emotional crossmodal integration (i.e., multisensorial decoding of emotions) is a crucial process that ensures adaptive social behaviors and responses to the environment. Recent evidence suggests that in ... [more ▼]

Emotional crossmodal integration (i.e., multisensorial decoding of emotions) is a crucial process that ensures adaptive social behaviors and responses to the environment. Recent evidence suggests that in binge drinking-an excessive alcohol consumption pattern associated with psychological and cerebral deficits-crossmodal integration is preserved at the behavioral level. Although some studies have suggested brain modifications during affective processing in binge drinking, nothing is known about the cerebral correlates of crossmodal integration. In the current study, we asked 53 university students (17 binge drinkers, 17 moderate drinkers, 19 nondrinkers) to perform an emotional crossmodal task while their behavioral and neurophysiological responses were recorded. Participants had to identify happiness and anger in three conditions (unimodal, crossmodal congruent, crossmodal incongruent) and two modalities (face and/or voice). Binge drinkers did not significantly differ from moderate drinkers and nondrinkers at the behavioral level. However, widespread cerebral modifications were found at perceptual (N100) and mainly at decisional (P3b) stages in binge drinkers, indexed by slower brain processing and stronger activity. These cerebral modifications were mostly related to anger processing and crossmodal integration. This study highlights higher electrophysiological activity in the absence of behavioral deficits, which could index a potential compensation process in binge drinkers. In line with results found in severe alcohol-use disorders, these electrophysiological findings show modified anger processing, which might have a deleterious impact on social functioning. Moreover, this study suggests impaired crossmodal integration at early stages of alcohol-related disorders. [less ▲]

Detailed reference viewed: 22 (0 UL)
Full Text
Peer Reviewed
See detailValuing Creativity, Feeling Overworked and Working Hours: Male Workers and the New Spirit of Capitalism
Samuel, Robin UL; Kanji, Shireen

in Time & Society (in press)

Boltanski and Chiapello (2005) argued that creativity is a required attribute of managers emanating from the ideology of the ‘New Spirit of Capitalism’. Ideology provides the justification for work ... [more ▼]

Boltanski and Chiapello (2005) argued that creativity is a required attribute of managers emanating from the ideology of the ‘New Spirit of Capitalism’. Ideology provides the justification for work practices and brings material consequences in relation to the experience of time. This article explores both the ideology and the links between the ideological and the experience of time by assessing whether male managers prioritise creativity and whether this is related to their working hours, driving them to work longer hours than other workers and longer hours than they actually want. Men’s dominant position in work organisations puts them at the centre of this exploration. Using multilevel logistic and linear models on 2010 data from the European Social Survey (N = 7049), we show that male managers prioritise creativity more than other workers do. There are consequences for the experience of time as valuing creativity in combination with being a manager increases working hours above the large and significant effect of being a manager. The feeling of overwork is raised independently for those who value creativity and for those who are managers. [less ▲]

Detailed reference viewed: 58 (16 UL)
Full Text
Peer Reviewed
See detailAccess to Medical Technologies: Do Gender and Social Capital Matter?
Geraudel, Mickaël UL; Gundolf, Katherine; Cesinger, Beate et al

in Management International = International Management = Gestión Internacional (in press)

We explore the relationship between the characteristics of social capital, the speed of access to medical technologies and the role of gender in a private practice context. Our findings from a sample of ... [more ▼]

We explore the relationship between the characteristics of social capital, the speed of access to medical technologies and the role of gender in a private practice context. Our findings from a sample of 98 German private practitioners show that: (a) being a woman has an overall negative impact on the speed of access to medical technologies; (b) private practitioners with strong social network ties obtain quicker access to medical technologies than do those with weak ties; (c) men relying on their weak ties perform better than women who do so. In contrast, we observe that women relying on strong ties outperform their male counterparts in terms of speed of access to medical technologies. [less ▲]

Detailed reference viewed: 34 (1 UL)
Full Text
Peer Reviewed
See detailEffects of cold stimulation on cardiac-vagal activation: Randomized controlled trial with healthy participants
Jungmann, Manuela; Vencatachellum, Shervin UL; van Ryckeghem, Dimitri UL et al

in Journal of Medical Internet Research (in press)

Background: The experience of psychological stress has not yet been adequately tackled with digital technology by catering to healthy individuals who wish to reduce their acute stress levels. For the ... [more ▼]

Background: The experience of psychological stress has not yet been adequately tackled with digital technology by catering to healthy individuals who wish to reduce their acute stress levels. For the design of digitally mediated solutions, physiological mechanisms need to be investigated that have the potential to induce relaxation with the help of technology. Research has shown that physiological mechanisms embodied in the face and neck regions are effective for diminishing stress related symptoms. The study described in this paper expands on these areas with the design for a wearable in mind. As this study charts new territory in research, it also represents a first evaluation of the viability for a wearables concept to reduce stress. We inquire into the effects of cold stimulation on heart rate (HR) and heart rate variability (HRV) in the neck region using a Thermode device. Objective: The objectives of this study were to assess whether (a) HRV is increased and (b) HR is decreased during a cold stimulation compared to a (non-stimulated) control condition. Effects were in particular expected in the neck and cheek regions and less in the forearm area (c). Methods: Participants were seated in a lab chair and tested with cold stimulation on the right side of the body. A Thermode was placed on the neck, cheek and forearm. Participants’ electrocardiogram was recorded and subsequently analyzed. The study was a fully randomized, within subject design. The cold stimulation was applied in 16 s intervals over 4 trials per testing location. The control condition proceeded exactly like the cold condition, except the thermal variable was manipulated to remain on the baseline temperature. HR was measured in msec IBI. rMSSD analyses were used to index HRV. Data were analyzed using a repeated measurements analysis of variance approach with two repeated measurements factors, i.e. Body Location (neck, cheek, forearm) and Condition (cold, control) Results: The data analysis of 61 participants (on exclusion of outliers) showed a main effect for body location for HR and HRV, a main effect for condition for HR and HRV and an interaction effect for condition and body location for HR and HRV. The results obtained demonstrate a pattern of cardiovascular reactivity to cold stimulation, suggesting an increase in cardiac-vagal activation. The effect was found to be significant for cold stimulation in the lateral neck area. Conclusion: The results confirmed our main hypothesis. This sets the stage for further investigations of the stress reduction potential in the neck region by developing a wearable prototype that can be used for cold application. Future studies should include a stress condition, test for a range of temperatures and durations, and collect self-report data on perceived stress levels to advance current findings. [less ▲]

Detailed reference viewed: 18 (5 UL)
Full Text
Peer Reviewed
See detailCompte rendu de Ph. Poirier (dir.), Les pouvoirs d’un parlement. La Chambre des députés du Luxembourg, Promoculture-Larcier, Windhof, 2014
Heuschling, Luc UL

in Hemecht : Zeitschrift für Luxemburger Geschichte = Revue d'Histoire Luxembourgeoise (in press)

Detailed reference viewed: 13 (1 UL)
Full Text
Peer Reviewed
See detailResilience factors in children with Juvenile Idiopathic Arthritis and their parents: the role of child and parent psychological flexibility.
Beeckman, Melanie; Hughes, Sean; van Ryckeghem, Dimitri UL et al

in Pain Medicine : The Official Journal of the American Academy of Pain Medicine (in press)

Objective: Chronic pain is central to Juvenile Idiopathic Arthritis (JIA) and is predictive of impaired functioning. Whereas most work has focused on identifying psychosocial risk factors for maladaptive ... [more ▼]

Objective: Chronic pain is central to Juvenile Idiopathic Arthritis (JIA) and is predictive of impaired functioning. Whereas most work has focused on identifying psychosocial risk factors for maladaptive outcomes, we explored the idea that child and parental psychological flexibility (PF) represent resilience factors for adaptive functioning of the child. We also explored differences between general versus pain-specific PF in contributing to child outcomes. Methods: Children with JIA (8-18 years) and (one of) their parents were recruited at the department of pediatric rheumatology at the Ghent University Hospital in Belgium. They completed questionnaires assessing child and parent general and pain-specific PF and child psychosocial and emotional functioning, and disability. Results: The final sample consisted of fifty-nine children and forty-eight parents. Multiple regression analyses revealed that child PF contributed to better psychosocial functioning and less negative affect. Child pain acceptance contributed to better psychosocial functioning, lower levels of disability and lower negative affect, and also buffered against the negative influence of pain intensity on disability. Bootstrap mediation analyses demonstrated that parental (general) PF indirectly contributed to child psychosocial functioning and affect via the child’s (general) PF. Parent pain-specific PF was indirectly linked to child psychosocial functioning, disability, and negative affect via child pain acceptance. Conclusion: Our findings indicate that child and parental PF are resilience factors and show that pain acceptance buffers against the negative impact of pain intensity. Implications for psychosocial interventions that target (pain-specific) PF in children as well as in parents are discussed. [less ▲]

Detailed reference viewed: 16 (0 UL)