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See detailKnowledge Sharing in a Coopetition Project Team: An Institutional Logics Perspective
D'Armagnac, Sophie; Geraudel, Mickaël UL; Salvetat, David

in Strategic Change (in press)

Cooperation between firms is often addressed from the perspective of relationship organizing; however, we know little about people’s working-level engagement in collective action during interfirm projects ... [more ▼]

Cooperation between firms is often addressed from the perspective of relationship organizing; however, we know little about people’s working-level engagement in collective action during interfirm projects. Focusing on cooperation between rival firms (coopetition), this paper explores how knowledge can be shared among participants. We conduct a case study of a joint-project team composed of staff from rival firms. Using the principles of grounded theory, we identify four distinct modes of knowledge sharing. By interpreting these modes in terms of temporalities and influential social structures, we develop an understanding of how individual engagement promotes knowledge sharing in an inter-firm coopetitive project. The study reexamines emerging orientations (cooperation and competition) according to institutional logics (market, corporation, and community) and temporalities. It also offers insight into the management of inter-organizational projects that are viewed as temporary organizations. [less ▲]

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See detailUnintended triadic closure in social networks: The strategic formation of research collaborations between French inventors.
Berge, Laurent UL; Carayol, Nicolas; Cassi, Lorenzo et al

in Journal of Economic Behavior and Organization (in press)

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See detailThe Latent Topic Block Model for the Co-Clustering of Textual Interaction Data
Berge, Laurent UL; Bouveyron, Charles; Corneli, Marco et al

in Computational Statistics and Data Analysis (in press)

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See detailA Note on Stein’s Overreaction Puzzle
Lin, Yuehao; Lehnert, Thorsten UL

in Decisions in Economics and Finance (in press)

Recently, Christoffersen et al. (2013) argue that the overreaction puzzle of Stein (1989) can be explained by a variance-dependent pricing kernel. In this note, we challenge this view. Our theoretical ... [more ▼]

Recently, Christoffersen et al. (2013) argue that the overreaction puzzle of Stein (1989) can be explained by a variance-dependent pricing kernel. In this note, we challenge this view. Our theoretical results are in line with their argument that the variance under risk-neutral measure is more persistent than the variance under physical measure due to a negative variance risk premium. But our results do not support their argument that the more persistent variance is able to qualitatively explain Stein’s findings. We show theoretically that the persistence of the volatility cannot amplify the movements of long-term variance to short-term fluctuations in variance, and, therefore, conclude that Stein’s overreaction puzzle is still unsolved. [less ▲]

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See detailSearch-based Multi-Vulnerability Testing of XML Injections in Web Applications
Jan, Sadeeq UL; Panichella, Annibale UL; Arcuri, Andrea UL et al

in Empirical Software Engineering (in press)

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See detailDas Verhältnis zwischen Hochschule und Wissenschaft in Deutschland: Expansion – Produktion – Kooperation
Dusdal, Jennifer; Oberg, Achim; Powell, Justin J W UL

in DGS (Ed.) Komplexe Dynamiken globaler und lokaler Entwicklungen: Der Verhandlungsband des 39. Kongresses der Deutschen Gesellschaft für Soziologie vom 24.-28. September 2018 an der Georg-August-Universität Göttingen (in press)

Dieser Beitrag rekonstruiert den Einfluss der Hochschulentwicklung und der wissenschaftlichen Kapazitätsbildung auf die wissenschaftliche Wissensproduktion in Deutschland, einem der weltweit stärksten ... [more ▼]

Dieser Beitrag rekonstruiert den Einfluss der Hochschulentwicklung und der wissenschaftlichen Kapazitätsbildung auf die wissenschaftliche Wissensproduktion in Deutschland, einem der weltweit stärksten Produzenten wissenschaftlichen Wissen seit 1900. Folgende Forschungsfragen sollen beantwortet werden: Wie haben institutionalisierte Strukturen, und darin verschiedene Organisationsformen, die langfristige Entwicklung wissenschaftlicher Produktivität beeinflusst und verändert? In welchen organisationalen Netzwerken entwickelt sich aktuell die Wissenschaft weiter? Die Annäherung an den Forschungsgegenstand erfolgt auf der Makroebene anhand von Indikatoren zur Erfassung der globalen Expansion, Kooperation und Produktion der Wissenschaft. Vor dem Hintergrund dieses Untersuchungsrahmens wird dann auf der Mesoebene das Zusammenspiel von Organisationsformen in Deutschland mittels netzwerkanalytischer Verfahren betrachtet. Ziel des Beitrags ist, die Orte und institutionellen Settings wissenschaftlicher Produktion zu identifizieren und anhand ihrer Aufgaben und Ziele voneinander abzugrenzen sowie ihre Beziehungen zueinander herauszuarbeiten. Als theoretische Basis werden neo-institutionalistische Ansätze zur Untersuchung und Erklärung der Expansion des Hochschulwesens und der Wissenschaft und zur Analyse von organisationalen Netzwerken herangezogen. Grundlage der empirischen Analyse bilden Publikationen in peer-reviewed Zeitschriften als Kennzeichen wissenschaftlicher Produktion. [less ▲]

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See detailSeeing is believing: Gender diversity in STEM is related to mathematics self-concept
Niepel, Christoph UL; Stadler, Matthias UL; Greiff, Samuel UL

in Journal of Educational Psychology (in press)

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See detailLe discours de Charles-Mathias Simons du 23 octobre 1856 : une première théorisation du monisme avec primauté du droit international
Heuschling, Luc UL

in Pauly, Michel; Jungblut, Marie-Paule; Frieseisen, Claude (Eds.) Les grands débats à la Chambre des députés (in press)

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See detailMonitoring du système scolaire – Le modèle luxembourgeois (invited talk)
Fischbach, Antoine UL

Scientific Conference (2019, May 21)

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See detailLearning to Sport and Refactor Inconsistent Method Names
Liu, Kui UL; Kim, Dongsun; Bissyande, Tegawendé François D Assise UL et al

in 41st ACM/IEEE International Conference on Software Engineering (ICSE) (2019, May)

To ensure code readability and facilitate software maintenance, program methods must be named properly. In particular, method names must be consistent with the corresponding method implementations ... [more ▼]

To ensure code readability and facilitate software maintenance, program methods must be named properly. In particular, method names must be consistent with the corresponding method implementations. Debugging method names remains an important topic in the literature, where various approaches analyze commonalities among method names in a large dataset to detect inconsistent method names and suggest better ones. We note that the state-of-the-art does not analyze the implemented code itself to assess consistency. We thus propose a novel automated approach to debugging method names based on the analysis of consistency between method names and method code. The approach leverages deep feature representation techniques adapted to the nature of each artifact. Experimental results on over 2.1 million Java methods show that we can achieve up to 15 percentage points improvement over the state-of-the-art, establishing a record performance of 67.9% F1-measure in identifying inconsistent method names. We further demonstrate that our approach yields up to 25% accuracy in suggesting full names, while the state-of-the-art lags far behind at 1.1% accuracy. Finally, we report on our success in fixing 66 inconsistent method names in a live study on projects in the wild. [less ▲]

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See detailVIEW-INVARIANT ACTION RECOGNITION FROM RGB DATA VIA 3D POSE ESTIMATION
Baptista, Renato UL; Ghorbel, Enjie UL; Papadopoulos, Konstantinos UL et al

in IEEE International Conference on Acoustics, Speech and Signal Processing, Brighton, UK, 12–17 May 2019 (2019, May)

In this paper, we propose a novel view-invariant action recognition method using a single monocular RGB camera. View-invariance remains a very challenging topic in 2D action recognition due to the lack of ... [more ▼]

In this paper, we propose a novel view-invariant action recognition method using a single monocular RGB camera. View-invariance remains a very challenging topic in 2D action recognition due to the lack of 3D information in RGB images. Most successful approaches make use of the concept of knowledge transfer by projecting 3D synthetic data to multiple viewpoints. Instead of relying on knowledge transfer, we propose to augment the RGB data by a third dimension by means of 3D skeleton estimation from 2D images using a CNN-based pose estimator. In order to ensure view-invariance, a pre-processing for alignment is applied followed by data expansion as a way for denoising. Finally, a Long-Short Term Memory (LSTM) architecture is used to model the temporal dependency between skeletons. The proposed network is trained to directly recognize actions from aligned 3D skeletons. The experiments performed on the challenging Northwestern-UCLA dataset show the superiority of our approach as compared to state-of-the-art ones. [less ▲]

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See detailIntegrated micromechanical model for slope stability analysis
Kabore, Brice Wendlassida UL; Peters, Bernhard UL

Scientific Conference (2019, April 09)

Advances in supercomputing hardware have made it possible to handle highly complex geomechanical analysis with large data. Thus, particle-based methods are gaining an ever-increasing interest with ... [more ▼]

Advances in supercomputing hardware have made it possible to handle highly complex geomechanical analysis with large data. Thus, particle-based methods are gaining an ever-increasing interest with massively parallel programs being developed. These methods have been applied to the analysis of failure mechanisms and scenarios such as mass movement in landslides, avalanches under static, dynamic or seismic loading condition. They provide deep insights into the meso and micro-scale mechanisms leading to macroscopic instabilities. This contribution describes a micromechanical model for stability analysis and simulation in natural or man-made slopes under complex loading and boundary conditions. Based on the micromechanics of loose granular and compacted geomaterial, microstructural change, viscoelastic deformations, fracture, and healing are explicitly integrated into a coupled discrete particle and beam lattice model. Stress-based failure criteria and energy based dissipation and frictional contact are employed. Both gravity increase and strength reduction methods have been employed to evaluate the Factor of Safety (FoS) and potential failure surface and compared. With an emphasis on the impact of the microstructure and its spatial variability on stress-induced microcracks and crack propagation, this study outlines material models and properties relevant to stability analysis. Special focus has been put on layered slopes which present varying shear strength along the depth formed over time according to pressure, temperature, and moisture such as snowpack. This microstructural approach unifies geometrical and material information and allows the structural assembling layers of different strength. [less ▲]

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See detailOverprosecution and Negotiated Justice in Europe
Ligeti, Katalin UL; Robinson, Gavin UL

in Van Kempen, Piet Hein (Ed.) Overuse in the Criminal Justice System: On Criminalization, Prosecution and Imprisonment (2019)

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See detailInklusion, Arbeitsmarkt und Neoliberalismus im Zeitalter der VN-BRK
Limbach-Reich, Arthur UL

Conference given outside the academic context (2019)

Detailed reference viewed: 34 (7 UL)
See detailFemmes et informatique de la seconde guerre mondiale aux années 1980
Schafer, Valerie UL

Conference given outside the academic context (2019)

Au cours de cette table ronde, il s'agira d'interroger "l'âge d'or" des femmes dans l'informatique, de questionner des formes d'empowerment mais aussi d'invisibilisation des femmes et les premiers pas ... [more ▼]

Au cours de cette table ronde, il s'agira d'interroger "l'âge d'or" des femmes dans l'informatique, de questionner des formes d'empowerment mais aussi d'invisibilisation des femmes et les premiers pas vers la masculinisation de "l'informatique" (notion également à historiciser). [less ▲]

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See detailThermodynamics of Majority-Logic Decoding in Information Erasure
Sheng, Shiqi; Herpich, Tim UL; Diana, Giovanni et al

in Entropy (2019), 21(3), 284

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See detailVom Ende des mittelalterlichen Herzogtums bis zur Neugründung als Großherzogtum: Luxemburg zwischen den Grenzbereinigungen des Ancien Régime und der Neuordnung durch den Wiener Kongress (1779 – 1816)
Uhrmacher, Martin UL

Presentation (2019, March 13)

Nach jahrhundertelangen Konflikten zwischen den Königreichen Frankreich und Österreich um das Herzogtum Luxemburg war es 1779 zu einem Ausgleich gekommen, der erstmals neue, begradigte Grenzen exakt ... [more ▼]

Nach jahrhundertelangen Konflikten zwischen den Königreichen Frankreich und Österreich um das Herzogtum Luxemburg war es 1779 zu einem Ausgleich gekommen, der erstmals neue, begradigte Grenzen exakt festlegte. Doch bereits wenige Jahre später annektierte die französische Republik nach der Revolution alle linksrheinischen Territorien und gliederte sie als Départements in das französischen Staatsgebiet ein. Nach der Absetzung Napoleons beschloss der Wiener Kongress 1815 eine Neuordnung Europas. In Folge dessen kam es im linksrheinischen Raum zur Neugründung des Großherzogtums Luxemburg als Teil des ebenfalls neu gegründeten Königreichs der Vereinigten Niederlande. Bei der territorialen Neugliederung griff man aber nur an wenigen Stellen auf die Grenzen des alten Herzogtums von 1795 zurück. Statt dessen einigte man sich darauf, dass im Osten die Flussläufe von Mosel, Sauer und Our zukünftig die Grenze bildeten. Diese besteht bis heute fort. [less ▲]

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See detailUrban densities and patterns: stylized facts and generic abstract tools
Caruso, Geoffrey UL

Conference given outside the academic context (2019)

Detailed reference viewed: 39 (3 UL)