References of "2018"
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See detailOn the Empirical Saddlepoint Approximation with Application to Asset Pricing
Holcblat, Benjamin UL; Sowell, Fallaw

Presentation (2018, November 06)

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See detailEntrepreneurial Teams, New Venture Direction and Growth: Evidence from Luxembourg
Tryba, Anne UL

Doctoral thesis (2018)

New ventures can be an important driver of economic growth and technological progress. Yet, many new ventures fail and do not overcome the challenges of the early entrepreneurial phase. Extant research ... [more ▼]

New ventures can be an important driver of economic growth and technological progress. Yet, many new ventures fail and do not overcome the challenges of the early entrepreneurial phase. Extant research has acknowledged that the people who jointly start and manage a new venture have a key impact on its subsequent success and development. However, a discrepancy exists in how the interplay of their characteristics, cognition, and actions ultimately shape the way a new venture evolves. Therefore the primary purpose of this thesis is to contribute to this research stream by exploring the multifaceted role of entrepreneurial teams for new venture direction and growth. This is done with the aid of three research papers relying on a multiple case study and a specifically designed dataset from Luxembourg. The first paper illuminates how the shared pre-start-up transition moments of entrepreneurial team members influence the joint decision logic in the initial venture phase. Focusing on the composition of entrepreneurial teams, the second paper illustrates early activities that allow new ventures to leverage the diverse educational backgrounds of their team members to achieve financial growth. Lastly, the third paper explores aspects of leadership in new ventures and uncovers how agreement on an early shared vision affects subsequent changes in the entrepreneurial team, taking into account members’ relational ties. This thesis makes important contributions to research in entrepreneurship and strategic management, adding to a more fine-grained view on the micro-foundations and outcomes of entrepreneurial action. Also, it has practical implications for entrepreneurs, their mentors and investors, entrepreneurship education and policymakers. [less ▲]

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See detailFAST: A MapReduce Consensus for High Performance Blockchains
Khan, Nida UL

in ACM BlockSys'18 Proceedings of the 1st Workshop on Blockchain-enabled Networked Sensor Systems (2018, November 04)

Blockchain platforms when used as a database for IoT systems can resolve data reliability fault-tolerance, consistency and non-repudiation issues. However, their inherent shortcomings related to their ... [more ▼]

Blockchain platforms when used as a database for IoT systems can resolve data reliability fault-tolerance, consistency and non-repudiation issues. However, their inherent shortcomings related to their throughput in terms of processed transactions, limit their applicability in such environments in a decentralized way as the underlying network is unable to sustain high workloads. In this paper a fully decentralized high performance consensus mechanism, named FAST, is proposed for a public blockchain. FAST is based on mapreduce paradigm for aggregating and adding transactions on blockchain blocks. FAST was implemented and evaluated in a basic blockchain prototype. A light client for FAST using IPFS, was developed to bring about a reduction in the data stored locally. The obtained results from tests conducted on the prototype depict that FAST exceeds the performance of not just other existing blockchain platforms but comes very close to the throughput of traditional electronic payment networks such as Visa. [less ▲]

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See detailPhotography and Public History: Facing New Challenges
Duval, Cécile UL

Speeches/Talks (2018)

Photography, together with written material, is one of the traditional communication channels of public history. Written material on its own, especially in our predominantly visual era, can often fail to ... [more ▼]

Photography, together with written material, is one of the traditional communication channels of public history. Written material on its own, especially in our predominantly visual era, can often fail to convey the desired message; but images on their own can be misunderstood if no text is added to place them in the context. The scientific use of photograph requires the contextualisation of images by verified data. With the growth of sources in the field of public history, it is vital to constantly check and compare any available data about images because it could be tempted to play on the emotions generated by some photographs to elicit a stronger reaction from the public. This is ignoring the fact that reinterpreting a photo in this way is essentially the same as rewriting history. [less ▲]

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See detailIt's not only the game, it's also the player: The role of player personality in violent video game preference
Holl, Elisabeth UL; Melzer, André UL

Scientific Conference (2018, November 03)

In contrast to the effects of game content, violent video games have less been researched with regard to players' preferences for these games, and whether these preferences are related to certain ... [more ▼]

In contrast to the effects of game content, violent video games have less been researched with regard to players' preferences for these games, and whether these preferences are related to certain personality characteristics. Using a novel brief and uni-dimensional self-report measure, the present research examined the role of personality factors and preferences for violent video games. A scale of five items was administrated in two studies that involved 292 and 180 respondents, respectively. The same scale with two additional items was presented to 190 respondents in the third study, which included measures revealed by prior research to be relevant for understanding violent video game motivation and preference. More specifically, we measured participants' trait aggression, the Dark Triad traits of psychopathy, Machiavellianism, and narcissism. To test for the scale's discriminant validity, trait empathy was also included. In line with other findings in the literature (e.g., Greitemeyer, 2015), results obtained with the self-report measure indicated that players with a propensity for games featuring violent themes show callous, impulsive and exploitative attributes, whereas narcissism was not a significant predictor. However, and as already suggested by some authors (Hartmann, Möller, & Krause, 2014), a lack of empathy was found to predict violent game preferences. The present findings are important with regard to future research on video games that should focus more on the players and their gaming motivation than on the effects of playing alone. [less ▲]

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See detailEmpowering reuse of digital cultural heritage in context-aware crosscuts of European history
Antoniou, A; Lopez-Nores, M; Yannick, N et al

in Wallace, M; Antoniou, A (Eds.) Proceedings of the Workshop on Cultural Informatics co-located with the EUROMED International Conference on Digital Heritage 2018 (EUROMED 2018) (2018, November 03)

The paper presents the H2020 CrossCult project, providing a short overview, a summary of the platform developed by the project, a description of the consortium, lessons learnt in three main dimensions ... [more ▼]

The paper presents the H2020 CrossCult project, providing a short overview, a summary of the platform developed by the project, a description of the consortium, lessons learnt in three main dimensions (humanities, technology and business), the open challenges and the main tools developed by the project. [less ▲]

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See detailVisualizing the Learning Progress of Self-Driving Cars
Mund, Sandro; Frank, Raphaël UL; Varisteas, Georgios UL et al

in 21st International Conference on Intelligent Transportation Systems (2018, November 02)

Using Deep Learning to predict lateral and longitudinal vehicle control, i.e. steering, acceleration and braking, is becoming increasingly popular. However, it remains widely unknown why those models ... [more ▼]

Using Deep Learning to predict lateral and longitudinal vehicle control, i.e. steering, acceleration and braking, is becoming increasingly popular. However, it remains widely unknown why those models perform so well. In order for them to become a commercially viable solution, it first needs to be understood why a certain behavior is triggered and how and what those networks learn from human-generated driving data to ensure safety. One research direction is to visualize what the network sees by highlighting regions of an image that influence the outcome of the model. In this vein, we propose a generic visualization method using Attention Heatmaps (AHs) to highlight what a given Convolutional Neural Network (CNN) learns over time. To do so, we rely on a novel occlusion technique to mask different regions of an input image to observe the effect on a predicted steering signal. We then gradually increase the amount of training data and study the effect on the resulting Attention Heatmaps, both in terms of visual focus and temporal behavior. [less ▲]

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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. Lecture Notes in Computer Science, vol 11252. Springer, Cham (2018, November 02)

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 ▲]

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See detailCompetition and Workplace Bullying. The moderating role of passive avoidant leadership style.
Sischka, Philipp UL; Steffgen, Georges UL

Scientific Conference (2018, November 02)

The aim of the study was to test if competition is a potential risk factor for the occurrence of workplace bullying and if this association depends on the level of passive avoidant leadership style. We ... [more ▼]

The aim of the study was to test if competition is a potential risk factor for the occurrence of workplace bullying and if this association depends on the level of passive avoidant leadership style. We proposed that competition and passive avoidant leadership style are positive related to workplace bullying exposure and perpetration. Furthermore, we hypothesized that the effect of competition on workplace bullying exposure and perpetration is moderated through passive avoidant leadership style. An online survey design was employed and data were collected among U.S. employees. The final sample consists of 1,408 respondents. Workplace bullying exposure and perpetration were cross-sectionally assessed via self-labeling and behavioral experience method. Hierarchical regression analyses showed that competition and passive avoidant leadership style are important predictors for workplace bullying exposure and perpetration. Furthermore, the results indicated that the effect of competition on workplace bullying exposure (measured via behavioral method) and self-labeled workplace bullying exposure and perpetration is moderated through passive avoidant leadership style. However, for workplace bullying perpetration (measured via behavioral method) no moderation effect was found. The findings underline the importance of the supervisor’s behavior in the occurrence of workplace bullying. Organizations may decrease workplace bullying incidents by training their supervisors to apply a more constructive leadership style. [less ▲]

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See detailLinear smoothed extended finite element method for fatigue crack growth simulations
Surendran, M; Natarajan, Sundararajan; Palani, G.S. et al

in Engineering Fracture Mechanics (2018), 206

In this paper, the recently proposed linear smoothed extended finite element method (LSmXFEM) is employed to simulate the fatigue crack growth. Unlike the conventional extended finite element method, the ... [more ▼]

In this paper, the recently proposed linear smoothed extended finite element method (LSmXFEM) is employed to simulate the fatigue crack growth. Unlike the conventional extended finite element method, the LSmXFEM does not require special numerical integration technique to integrate the terms in the stiffness matrix. The stress intensity factors (SIFs) are evaluated by using the domain form of the interaction integral technique. The fatigue crack growth rate is evaluated using the generalized Paris’ law in conjunction with the maximum hoop stress criterion. The robustness of the method is demonstrated with a few examples for which the results are available in the literature. Then, the fatigue crack growth from the numerical simulation is compared with the experimental investigations performed on CR5 grade cold formed steel. It is seen that the fatigue life and the crack path obtained from the proposed method is in close agreement with the experimental observation. [less ▲]

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See detailA survey: The usage of Augmented Reality in Industry
Gallala, Abir UL; Hichri, Bassem UL; Plapper, Peter UL

in Robotix-Academy Conference for Industrial Robotics 2018 (2018, November 01)

Human-Robot-Interaction technologies in industry 4.0 and modern manufacturing are more and more growing. Using off-line robot programming methods such as Augmented Reality (AR) could gain time and money ... [more ▼]

Human-Robot-Interaction technologies in industry 4.0 and modern manufacturing are more and more growing. Using off-line robot programming methods such as Augmented Reality (AR) could gain time and money as well as improve programming and repair tasks. This paper is a study of the use of AR in smart factories. [less ▲]

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See detailA volume-averaged nodal projection method for the Reissner-Mindlin plate model
Ortiz-Bernardin, Alejandro; Köbrich, Philip; Hale, Jack UL et al

in Computer Methods in Applied Mechanics and Engineering (2018), 341

We introduce a novel meshfree Galerkin method for the solution of Reissner-Mindlin plate problems that is written in terms of the primitive variables only (i.e., rotations and transverse displacement) and ... [more ▼]

We introduce a novel meshfree Galerkin method for the solution of Reissner-Mindlin plate problems that is written in terms of the primitive variables only (i.e., rotations and transverse displacement) and is devoid of shear-locking. The proposed approach uses linear maximum-entropy approximations and is built variationally on a two-field potential energy functional wherein the shear strain, written in terms of the primitive variables, is computed via a volume-averaged nodal projection operator that is constructed from the Kirchhoff constraint of the three-field mixed weak form. The stability of the method is rendered by adding bubble-like enrichment to the rotation degrees of freedom. Some benchmark problems are presented to demonstrate the accuracy and performance of the proposed method for a wide range of plate thicknesses. [less ▲]

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See detailGrenzüberschreitende Umwelten
Schulz, Christian UL

Article for general public (2018)

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See detailThe Reflection of Data-Driven Value Creation in the 2018 OECD and EU Proposals
Sinnig, Julia UL

in EC Tax Review (2018), 27(6), 325-334

Is the current corporate tax system fit for the digitalized economy? The 2018 interim report of the OECD and the proposals of the European Commission on the introduction of significant digital presence ... [more ▼]

Is the current corporate tax system fit for the digitalized economy? The 2018 interim report of the OECD and the proposals of the European Commission on the introduction of significant digital presence and a digital services tax give new insights into policymakers’ perception of ‘value creation’ and income generation in digitalized business models. Although the right way to tax digitalized business models seems disputed with regard to the diverging outcomes of the OECD’s and European Commission’s work so far, it seems to be of common understanding that user data are susceptible of establishing a taxable nexus. In a first step, this article aims at analysing how the collection and processing of user data may create such genuine link between an income generating activity and a state territory enabling this state to exercise its taxing right. In that respect, the concept of value creation, a driving concept in the discussion on how to tax digitalized businesses, is critically reviewed and an attempt to understand its real meaning is presented. In a second step, the article analyses to which extent the long- and short-term proposals of the European Commission reflect such data-driven (taxable) value creation, critically highlighting their main characteristics and flaws. [less ▲]

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See detailSystemic network analysis identifies XIAP and IkappaBalpha as potential drug targets in TRAIL resistant BRAF mutated melanoma.
Del Mistro, Greta; Lucarelli, Philippe UL; Muller, Ines et al

in NPJ systems biology and applications (2018), 4

Metastatic melanoma remains a life-threatening disease because most tumors develop resistance to targeted kinase inhibitors thereby regaining tumorigenic capacity. We show the 2nd generation hexavalent ... [more ▼]

Metastatic melanoma remains a life-threatening disease because most tumors develop resistance to targeted kinase inhibitors thereby regaining tumorigenic capacity. We show the 2nd generation hexavalent TRAIL receptor-targeted agonist IZI1551 to induce pronounced apoptotic cell death in mutBRAF melanoma cells. Aiming to identify molecular changes that may confer IZI1551 resistance we combined Dynamic Bayesian Network modelling with a sophisticated regularization strategy resulting in sparse and context-sensitive networks and show the performance of this strategy in the detection of cell line-specific deregulations of a signalling network. Comparing IZI1551-sensitive to IZI1551-resistant melanoma cells the model accurately and correctly predicted activation of NFkappaB in concert with upregulation of the anti-apoptotic protein XIAP as the key mediator of IZI1551 resistance. Thus, the incorporation of multiple regularization functions in logical network optimization may provide a promising avenue to assess the effects of drug combinations and to identify responders to selected combination therapies. [less ▲]

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See detailDeterminants of cognitive decline in a large cross-national study using machine learning
Leist, Anja UL

in Innovation in Aging (2018, November), 2(S1), 244

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See detailPorts, cities and the global maritime infrastructure
Hesse, Markus UL; McDonough, Evan

in Kloosterman, Robert; Mamadouh, Virginie; Terhorst, Pieter (Eds.) Handbook on the Geographies of Globalisation (2018)

This chapter deals with the particular geographies of global maritime industries and their implications for concrete places, most notably port cities. In order to provide an up-to-date picture on this ... [more ▼]

This chapter deals with the particular geographies of global maritime industries and their implications for concrete places, most notably port cities. In order to provide an up-to-date picture on this subject matter, we firstly apply a supply chain perspective regarding maritime and port geographies, since the movement of ocean vessels and the territorial or geographical impact of these flows cannot be separated from the underlying logistics networks, or their spatio-temporal performance and overarching political-economic power configuration. Secondly, we employ a relational perspective with respect to ports, cities and their interaction against the background of globalised logistics networks. This relational approach is inspired by understanding cities and regions as increasingly dependent on, and co-constituted by, larger associations, networks, mobilities and identities, rather than conceiving these entities as fixed in territories within a bounded space, delineated by clear margins. For illustrative purposes, we add some empirical insights from two cases studies on related developments in the Netherlands, particularly the port city of Rotterdam and the inland port situated in Venlo. [less ▲]

Detailed reference viewed: 134 (0 UL)