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See detailPostwachstum in den Raumwissenschaften
Schulz, Christian UL

in Akademie fuer Raumforschung und Landesplanung. Nachrichten (2018), 47(4), 11-14

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See detailDiverse alternatives empirical evidence from German speaking scholarship
Schulz, Christian UL; Krueger, Robert

in Local Environment (2018), 23(7), 675-679

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See detailVue sur la scène politique: "House of Cards"
Kohns, Oliver UL

Conference given outside the academic context (2018)

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See detailTeachers make the difference! Gender specific predictors of bullying and cyberbullying
Steffgen, Georges UL; Heinz, Andreas UL

Scientific Conference (2018, April 26)

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See detailJudicial Deference in International Adjudication
Fahner, Johannes Hendrik UL

Presentation (2018, April 25)

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See detailJudicial Deference in International Adjudication
Fahner, Johannes Hendrik UL

Presentation (2018, April 16)

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See detailArrêt Polbud : consécration de la possibilité d'un principe inconditionnel de libre mobilité
Corbisier, Isabelle UL

in Journal de Droit Européen (2018), 248(4),

Dans son arrêt Polbud1, la Cour de justice de l’Union européenne permet qu’une transformation transfrontalière par transfert de siège puisse se faire en dissociant les sièges statutaire et réel Cette ... [more ▼]

Dans son arrêt Polbud1, la Cour de justice de l’Union européenne permet qu’une transformation transfrontalière par transfert de siège puisse se faire en dissociant les sièges statutaire et réel Cette jurisprudence devrait accentuer le phénomène de concurrence réglementaire entre les droits des sociétés des États membres et pourrait également fragiliser encore davantage la théorie du siège réel. L’arrêt Polbud remet possiblement en question l’approche fondée sur l’unité des sièges dans la future nouvelle proposition de directive sur le transfert transfrontalier de siège ............................................................................................................ [less ▲]

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See detailSoziale Gerechtigkeit statt soziale Kohäsion!
Pauly, Michel UL

Article for general public (2018)

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See detailMore Necessary and Less Sufficient: An Age-Period-Cohort Approach to Overeducation in Comparative Perspective
Bar-Haim, Eyal UL; Chauvel, Louis UL; Hartung, Anne UL

E-print/Working paper (2018)

In many countries, the skilled labor market has lagged behind educational expansion. As a result of increased competition, younger cohorts of the highly educated face decreasing returns to education or ... [more ▼]

In many countries, the skilled labor market has lagged behind educational expansion. As a result of increased competition, younger cohorts of the highly educated face decreasing returns to education or overeducation. Surprisingly, decreasing occupational outcomes do not coincide empirically with the economic returns among those with tertiary education. Regarding the process of changes in economic returns to education based on cohort transformations, we expect that the expansion of tertiary education affects specific cohorts, which find themselves facing more labor market competition. As a result, the economic returns to education should decrease over cohorts even though they remain stable and even increase during the same period. To study this process, we model economic returns with a new Age-Period- Cohort-Trended-Lag (APCTLAG) method, which allows comparing the gap in economic returns between tertiary and less than tertiary education over cohorts. Using the Luxembourg Income Study (LIS), we analyze trends over three decades in 12 countries. Our results confirm that educational returns for tertiary education have declined over time, even though the gap between the educated and the less educated has remained similar in most of the countries. For younger cohorts, tertiary education has become more necessary to survive in the competitive labor market, but the actual economic returns to it have decreased - making tertiary education less sufficient than before. [less ▲]

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See detailUser Rewarding and Distributed Payment Platforms for Mobile Crowdsensing Systems
Capponi, Andrea UL

Scientific Conference (2018, April)

Mobile Crowdsensing (MCS) has become in the last years one of the most prominent paradigms for urban sensing. In MCS systems, citizens actively participate in the sensing process by contributing data from ... [more ▼]

Mobile Crowdsensing (MCS) has become in the last years one of the most prominent paradigms for urban sensing. In MCS systems, citizens actively participate in the sensing process by contributing data from their mobile devices. To make e ective a MCS campaign, large participation is fundamental. Users sustain costs to contribute data and they may be reluctant in joining the sensing process. Hence, it is essential to incentivize participants. Several incentive mechanisms have been investigated, such as monetary rewarding. In this context, distributed payment platforms based on custom built blockchains assume a fundamental role. We aim to develop a platform to distribute micro-payments following rewarding schemes. The key idea is to di erentiate between users through several parameters, such as the amount of acquired data and the Quality of Information (QoI), according to the particular campaign and the need of the organizers. [less ▲]

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See detailTaking stock of the European Grouping of Territorial Cooperation (EGTC): from policy formulation to policy implementation
Evrard, Estelle UL; Engl, Alice

in Medeiros, Eduardo (Ed.) European Territorial Cooperation : Theoretical and Empirical Approaches to the Process and Impacts of Cross-Border and Transnational Cooperation in Europe (2018)

The European Grouping of Territorial Cooperation (EGTC) has become a central tool for (sub-) state authorities to organise territorial cooperation in the EU. To take stock of this rapid change, the ... [more ▼]

The European Grouping of Territorial Cooperation (EGTC) has become a central tool for (sub-) state authorities to organise territorial cooperation in the EU. To take stock of this rapid change, the present chapter suggests an analytical framework in two steps. Firstly, the EGTC instrument is symptomatic of a turn in how the European territorial cohesion policy relates to (sub-) state territorial cooperation (policy formulation). Before the publication of the EGTC regulation in 2006, the EU support for territorial cooperation was mainly financial (e.g. INTERREG) and regulatory (e.g. consolidation of the single market). No specific legal framework was provided. The contribution investigates this progressive turn in the cohesion policy. Secondly, the EGTC represents a tool for implementing territorial cooperation (policy implementation). The number of EGTCs created over about a decade demonstrates that this instrument fills a gap in the legislative framework of territorial cooperation. Our comparative assessment of the use of the tool reveals a dominant implementation pattern. Most of the existing EGTCs are territorially bound organisations, set-up on adjacent borders by local and regional authorities, a minority being interregional or transregional. Although they mostly have collective action resources and instruments and have identifiable objectives shared by their respective members, they follow a rather traditional pattern of cooperation where each individual member’s core activities primarily relate to a (sub-) state authority and where the EGTC acts primarily as an agent relying on its members. [less ▲]

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See detailDigitalisierung der Arbeit in Luxemburg - Teil 3
Sischka, Philipp UL; Steffgen, Georges UL

E-print/Working paper (2018)

Arbeitnehmer unterscheiden sich hinsichtlich dem Grad durch den ihre Arbeit von der Digitalisierung betroffen ist sowie durch die Auswirkungen, die die Digitalisierung auf ihre Arbeit und ihr Arbeits(er ... [more ▼]

Arbeitnehmer unterscheiden sich hinsichtlich dem Grad durch den ihre Arbeit von der Digitalisierung betroffen ist sowie durch die Auswirkungen, die die Digitalisierung auf ihre Arbeit und ihr Arbeits(er)leben haben. Arbeitnehmer, deren Arbeit stärker durch die Digitalisierung beeinflusst ist, erleben tendenziell mehr Partizipation, Feedback und Autonomie auf ihrer Arbeit. Gleichzeitig weisen sie auch mehr emotionale und mentale Anforderungen, sowie mehr Zeitdruck auf. Arbeitnehmer, deren Arbeit nur in geringem Maß von der Digitalisierung betroffen ist, sind dagegen weniger von emotionalen und mentalen Anforderungen, sowie von Zeitdruck, Konkurrenz und Mobbing betroffen. Insbesondere die geringere Planbarkeit von Arbeitszeit und Freizeit sowie die stärkere Überwachung und Kontrolle der Arbeitsleistung sind negative Konsequenzen der Digitalisierung, die zu einem verstärkten Erleben von emotionalen und mentalen Anforderungen sowie von Zeitdruck, Konkurrenz und Mobbing führt. Die Möglichkeit durch die Digitalisierung auch von zuhause oder von unterwegs arbeiten zu können führt einerseits zu mehr wahrgenommener Autonomie, andererseits ist dieses Potenzial der Digitalisierung auch mit negativen Konsequenzen verknüpft (z.B. erhöhter Zeitdruck). [less ▲]

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See detailDigitalisierung der Arbeit in Luxemburg - Teil 2
Sischka, Philipp UL; Steffgen, Georges UL

E-print/Working paper (2018)

Arbeitnehmer mit höherer formaler Bildung sowie Arbeitnehmer, die als Manager und Führungskräfte, in akademischen Berufen, als Techniker und als Bürokräfte arbeiten, berichten eher von einer gestiegenen ... [more ▼]

Arbeitnehmer mit höherer formaler Bildung sowie Arbeitnehmer, die als Manager und Führungskräfte, in akademischen Berufen, als Techniker und als Bürokräfte arbeiten, berichten eher von einer gestiegenen Entscheidungsfreiheit, von geringerer körperlicher Belastung, von mehr Aufgaben, von der Notwendigkeit ständiger Weiterentwicklung der eigenen Fähigkeiten sowie einer erhöhten Arbeitsleistung durch die Digitalisierung. Insbesondere Hilfsarbeitskräfte geben seltener an sowohl von den Vorteilen aus auch von den Nachteilen der Digitalisierung betroffen zu sein. Differenziert nach Geschlecht oder nach Alter ergeben sich oft nur geringfügige Unterschiede. [less ▲]

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See detailAdaptive capacities of cancer cells in Glioblastoma
Dirkse, Anne Marie Elisabeth UL

Doctoral thesis (2018)

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See detailDigitalisierung der Arbeit in Luxemburg - Teil 1
Sischka, Philipp UL; Steffgen, Georges UL

E-print/Working paper (2018)

Die Digitalisierung steht derzeit im Fokus der öffentlichen und politischen Debatte. Im Folgenden wird dargestellt, wie Arbeitnehmer in Luxemburg ihre Arbeit durch die Digitalisierung beeinflusst sehen ... [more ▼]

Die Digitalisierung steht derzeit im Fokus der öffentlichen und politischen Debatte. Im Folgenden wird dargestellt, wie Arbeitnehmer in Luxemburg ihre Arbeit durch die Digitalisierung beeinflusst sehen. Hierbei werden die verschiedenen Formen der Digitalisierung sowie die Angst durch den technischen Fortschritt seinen Arbeitsplatz zu verlieren näher beleuchtet. Manager und Führungskräfte, Arbeitnehmer in akademischen Berufen, Techniker sowie Bürokräfte konstatieren einen starken Einfluss der Digitalisierung auf ihre Arbeit. Diese Einschätzung fällt für Arbeitnehmer in Dienstleistungs- und in Handwerksberufen sowie für Bedienern von Anlagen und Hilfsarbeitskräfte moderater aus. Während Manager und Führungskräfte, sowie Arbeitnehmer in akademischen Berufen vor allem die Bedeutung von elektronischer Kommunikation und unterstützender elektronischer Geräte hervorheben, kommt für Techniker und Arbeitnehmer in Handwerksberufen auch noch das Arbeiten mit computergesteuerten Maschinen oder Robotern hinzu. Die mit der Digitalisierung und dem technischen Fortschritt häufig debattierte Angst vor Arbeitsplatzverlust ist insgesamt moderat ausgeprägt. Etwas stärker ist diese bei Arbeitnehmern der Altersgruppe ab 35 Jahren sowie bei Bedienern von Anlagen und Bürokräften ausgeprägt. [less ▲]

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See detailOptimierung und Charakterisierung einer mittels Laserstrahl gefügten Verbindung zwischen Aluminium und Polyamid 6.6
Lamberti, Christian UL

Doctoral thesis (2018)

The creation of strong joints between dissimilar materials and in particular between polymers and metals is one of the most often discussed topics in the fields of automotive, aerospace and transportation ... [more ▼]

The creation of strong joints between dissimilar materials and in particular between polymers and metals is one of the most often discussed topics in the fields of automotive, aerospace and transportation. Especially the combination of polyamide and aluminum is of highest interest, due to their market share as construction materials. New joining concepts are anticipated to deliver strong, durable and resource efficient structural components that are ideally suited for lightweight designs. However, current research activities have shown that the highly distinct material properties of these materials pose enormous challenges on the creation of hybrid structures. The cause that potentially enables the connection between the aluminum surface and the polymer is still not fully understood. The research objective of the presented work, therefore is, on the one hand, to create an optimal joint between aluminum and polyamide 6.6 using a laser beam to reach high shear strength for an industrial application. On the other hand, the presented work seeks to deliver a substantial contribution to furtherly understand the interaction between the polymer and the metal surface during the thermal joining. A laser-based joining method was developed that enables the researchers to overcome limitations of conventional processes, that is minimizing space requirements, making the application of additional gaskets obsolete, reaching high strength, saving weight and reducing processing time. The effectiveness of different surface pre-treatments has been studied, and the described optimization of this method has lead to an increase of the shear strength of the joints by more than 100 %. Laser ablation and the hydrothermal treatment of the metallic surface, before the joining operation, lead to the highest joint strength. The surface pre-treatment method of laser ablation delivered to transfer the gathered insights and experience from the laboratory to the industrial scale, due to its repeatability and reproducibility. The experiment mentioned above includes the use of production materials, such as aluminum with a higher sheet thickness of up to 1.48 mm and glass fiber reinforced polymer. Shear strength of 40 MPa was reached in quasi-static single lap shear tests. During dynamic testing, samples maintained 63 % of static breaking load after one million cycles. The hydrothermal treatment of the aluminum surface leads to a lower surface roughness of Ra = 1.58 µm in average as opposed to 4.90 µm after laser ablation. Due to the lower roughness values, the first-mentioned method was chosen to study the interaction. An XPS-analysis revealed a strong influence of the surface pre-treatment method on the chemical composition of the metal surface, which becomes noticeable by hydroxylation of the surface layer and is expressed by the oxide ratio (O/Al) and hydroxide ratio (OH/O). A high O/Al ratio of 2.36 and an OH/O ratio of 0.63 after the hydrothermal treatment is showing a strong increase of the amount of hydroxide in direct comparison to values of 35 % and 36 % of OH/O ratio after ethanol and hexane cleaning respectively. The question, as to which extent the presence of such hydroxide structures at the boundary layer of the aluminum influence the interaction between the metal surface and the polymer, was a subject matter of an additional FT-IR analysis. In case of the infrared spectra from thin polymer films on the hydrothermally treated surface, clear indications of interaction are visible. In direct comparison to the infrared spectra from polymer films on either ethanol or hexane cleaned surfaces, this interaction seems to increase nearby of the interface further. The interaction mentioned above appears at the carbonyl band and amine band as a shift of 4 cm-1 and 8 cm-1 and an increase of the full width at half maximum by 35 % respectively 40 %. Additional strong differences are visible at the molecule vibrations below 1,200 cm-1, which are typically assigned to both crystalline phases and amorphous phases of the polyamide. In case of the hydrothermal treatment, collected data indicates a polymorphous state inside the polymer films, which seems to become increasingly disordered close to the interface. On the contrary, spectra from the polymer films on ethanol and hexane pre-treated substrates show only marginal changes. Methods are proposed to build upon the results described in this work and refine distinct signs of the interaction. [less ▲]

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See detailDie politische Form der Gegenwartsliteratur. Robert Menasses EU-Roman 'Die Hauptstadt'
Busch, Christopher UL

Conference given outside the academic context (2018)

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