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See detailPotential of the Deformation Area Difference (DAD)-Method for Condition Assessment of Bridge Structures
Waldmann, Danièle UL; Erdenebat, Dolgion UL

Scientific Conference (2019, August 27)

The construction industry ranks in the back rows in terms of digitalization. The numerous existing bridge structures require considerable effort for inspection and reliable assessment of their condition ... [more ▼]

The construction industry ranks in the back rows in terms of digitalization. The numerous existing bridge structures require considerable effort for inspection and reliable assessment of their condition. However, the state-of-the-art for inspecting these structures still relies on the visual inspection realized by bridge inspectors. The current paper summarizes several research projects in the field of condition assessment of bridge structures at the University of Luxembourg by analysing the structural response due to dynamic excitation and static loading tests. The latest development aims at using the most modern measurement techniques by combining them to a new method, the Deformation Area Difference (DAD)-Method in order to simplify and automatize at most the inspection process. The proposed DAD-Method is based on conventional static load deflection tests. It allows the localization of stiffness-reducing damage by using a very precise measurement of the deflection line and by combining this outcome to the deflection line generated by a simplified finite element model of the bridge. In order to investigate the condition of a bridge by the DAD-Method modern measurement techniques such as photogrammetry and laser scanning are used. In the framework of the conducted research, these techniques are also compared to traditional measurement systems such as total station and inductive displacement sensors as well as to digital levelling sensors. By theoretical examples and experimental tests, it can be shown that the DAD-Method is able to detect and localize damage when the damage level is dominant on the measurement noise. This paper investigates also the application of the method on a real bridge structure in Luxembourg. All of the above-mentioned measurement techniques were used, whereby the photogrammetry is applied using both, stable tripods and an autonomous flying drone. This allows examining the accuracy of the different measurement systems when applied on a real-size structure. [less ▲]

Detailed reference viewed: 55 (12 UL)
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See detailThe potential scaling of urban heat island and nitrogen dioxide with urban population: a systematic review
Wei, Yufei UL; Caruso, Geoffrey UL; Lemoy, Rémi

Scientific Conference (2019, September 08)

Detailed reference viewed: 20 (3 UL)
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See detailThe Potential Short- and Long-Term Disruptions and Transformative Impacts of 5G and Beyond Wireless Networks: Lessons Learnt from the Development of a 5G Testbed Environment
PATWARY, MOHMAMMAD; NAWAZ, SYED JUNAID; RAHMAN, MD. ABDUR et al

in IEEE Access (2020)

The capacity and coverage requirements for 5th generation (5G) and beyond wireless connectivity will be significantly different from the predecessor networks. To meet these requirements, the anticipated ... [more ▼]

The capacity and coverage requirements for 5th generation (5G) and beyond wireless connectivity will be significantly different from the predecessor networks. To meet these requirements, the anticipated deployment cost in the United Kingdom (UK) is predicted to be between £30bn and £50bn, whereas the current annual capital expenditure (CapEX) of the mobile network operators (MNOs) is £2.5bn. This prospect has vastly impacted and has become one of the major delaying factors for building the 5G physical infrastructure, whereas other areas of 5G are progressing at their speed. Due to the expensive and complicated nature of the network infrastructure and spectrum, the second-tier operators, widely known as mobile virtual network operators (MVNO), are entirely dependent on the MNOs. In this paper, an extensive study is conducted to explore the possibilities of reducing the 5G deployment cost and developing viable business models. In this regard, the potential of infrastructure, data, and spectrum sharing is thoroughly investigated. It is established that the use of existing public infrastructure (e.g., streetlights, telephone poles, etc.) has a potential to reduce the anticipated cost by about 40% to 60%. This paper also reviews the recent Ofcom initiatives to release location-based licenses of the 5G-compatible radio spectrum. Our study suggests that simplification of infrastructure and spectrum will encourage the exponential growth of scenario-specific cellular networks (e.g., private networks, community networks, micro-operators) and will potentially disrupt the current business models of telecommunication business stakeholders – specifically MNOs and TowerCos. Furthermore, the anticipated dense device connectivity in 5G will increase the resolution of traditional and non-traditional data availability significantly. This will encourage extensive data harvesting as a business opportunity and function within small and medium-sized enterprises (SMEs) as well as large social networks. Consequently, the rise of new infrastructures and spectrum stakeholders is anticipated. This will fuel the development of a 5G data exchange ecosystem where data transactions are deemed to be high-value business commodities. The privacy and security of such data, as well as definitions of the associated revenue models and ownership, are challenging areas – and these have yet to emerge and mature fully. In this direction, this paper proposes the development of a unified data hub with layered structured privacy and security along with blockchain and encrypted off-chain based ownership/royalty tracking. Also, a data economy-oriented business model is proposed. The study found that with the potential commodification of data and data transactions along with the low-cost physical infrastructure and spectrum, the 5G network will introduce significant disruption in the Telco business ecosystem. [less ▲]

Detailed reference viewed: 108 (6 UL)
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See detailPotential socio-economic and lifestyle factors associated with sexual dissatisfaction among men and women
Anquetil, M.; Baumann, Michèle UL

in International Institute, of Sociology (Ed.) 39th World Congress of the International Institute of Sociology. (2009)

This study assessed the associations between potential socio-economic and lifestyle factors with sexual dissatisfaction and gender disparities in north-eastern France. In total 6216 subjects (randomly ... [more ▼]

This study assessed the associations between potential socio-economic and lifestyle factors with sexual dissatisfaction and gender disparities in north-eastern France. In total 6216 subjects (randomly selected subjects completed a postal questionnaire gathering socio-demographic characteristics, occupation, living alone, income, tobacco use, alcohol abuse (Deta questionnaire), heath status, fatigue, sleep disorders, diseases, depression/sadness and sexual dissatisfaction. Data were analyzed using multivariate logistic models. Sexual dissatisfaction affected 36% of men and 43% of women (p<0.001). Among men sexual dissatisfaction strongly related to age (after 60 years), living alone (increased risk IR 2-fold), not-good health (IR 1.8-fold), respiratory disease (IR 34%), physical disability (IR 51%), cognitive disability (IR 69%), fatigue (IR 43%), depression/sadness (IR 65%), and upper professionals. Among women, sexual dissatisfaction strongly related to age (after 50 years), primary education (IR 38%), living alone (IR 2.4-fold), not-good health (IR 52%), physical disability (IR 28%), cognitive disability (IR 57%), fatigue (IR 33%), depression/sadness (IR 48%), insufficient income (36%), and upper professionals. In conclusion, sexual dissatisfaction related to a number socio-economic and lifestyle factors and their associations differed between men and women in the general population. These findings highlight the benefit of improving living conditions, lifestyle, health status and related risk factors. [less ▲]

Detailed reference viewed: 36 (0 UL)
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See detailPotential-energy surfaces for charge exchange between singly charged ions and a LiF surface
Wirtz, Ludger UL; Burgdorfer, J.; Dallos, M. et al

in Physical Review. A (2003), 68(3),

We analyze the adiabatic potential-energy surfaces relevant for neutralization of singly charged ions in slow vertical incidence onto a lithium fluoride surface. The surface is represented by a cluster of ... [more ▼]

We analyze the adiabatic potential-energy surfaces relevant for neutralization of singly charged ions in slow vertical incidence onto a lithium fluoride surface. The surface is represented by a cluster of varying size augmented by point charges of alternating sign in order to include the proper Madelung potential of the ionic crystal. Our calculation proceeds on the multiconfiguration self-consistent-field and multireference configuration-interaction levels. Size-consistency corrections based on the Davidson correction and multireference averaged quadratic coupled cluster methods are included as well. We emphasize the importance of a proper treatment of electron correlation signifying the polarization of the surrounding cluster environment in ab initio calculations of charge transfer at surfaces. From the topology of the surfaces, in particular the existence or absence of avoided crossings (or, more generally, conical intersections), qualitative predictions for the neutralization process can be made. The comparative analysis of potential curves for H+, C+, S+, and Ne+ projectiles provides an explanation for the recently observed threshold behavior for potential sputtering. [less ▲]

Detailed reference viewed: 77 (0 UL)
See detailPotentiale technologiebasierter Kompetenzerfassung. Das Beispiel Komplexes Problemlösen
Greiff, Samuel UL; Funke, Joachim

Presentation (2013, October)

Detailed reference viewed: 64 (2 UL)
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See detailPotentials for Realising a Consistent Transition Between Function Modelling with the IFM Framework and Early System Simulation
Eisenbart, Boris UL; Dohr, Fabio; Gericke, Kilian UL et al

in Proceedings of 19th International Conference on Engineering Design (2013)

Conceptual design is considered one of the most demanding design tasks requiring a joint effort of the involved designers, particularly in interdisciplinary design. Sound decision-making across ... [more ▼]

Conceptual design is considered one of the most demanding design tasks requiring a joint effort of the involved designers, particularly in interdisciplinary design. Sound decision-making across disciplines on alternative solution concepts may be considerably facilitated through early system simulation. A consistent transition of the available information in function modelling to early system simulation may thus support designers in this task. The IFM framework intends to support cross-disciplinary collaboration of involved designers by providing an integrated function modelling approach. In the paper it is analysed in how far a consistent transition from the IFM framework to established modelling techniques for simulation may be realised. The paper compares the information required for early system simulation in an interdisciplinary design context to the specific information conveyed in the different views of the IFM framework. The analysis identifies specific potentials and barriers for a consistent transition between them. Finally, the implications of the derived insights are discussed. [less ▲]

Detailed reference viewed: 84 (8 UL)
See detailPotentials of assessment of 21st century skills in technical environments
Greiff, Samuel UL; Reeff, J.-P.

Presentation (2012, October 15)

Detailed reference viewed: 35 (1 UL)
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See detailLe potentiel diagnostique des épreuves standardisées au Luxembourg
Dierendonck, Christophe UL; Burton, Réginald UL; Fagnant, Annick

Scientific Conference (2009)

Detailed reference viewed: 34 (3 UL)
See detailDas Potenzial fantastischer Literatur im Deutschunterricht
Klose, Anne-Christine UL

Presentation (2017, March 16)

Detailed reference viewed: 127 (3 UL)
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See detailPotenzial für Energieoptimierungen auf Kläranlagen in Rheinland-Pfalz
Hansen, Joachim UL

in Tagungsband Ökoeffizienz in der Wasserwirtschaft - Schwerpunkt Energieoptimierung von Kläranlagen (2007), 26

Detailed reference viewed: 56 (0 UL)
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See detailPotenziale der Faulung und Klärgasverwertung in Rheinland-Pfalz
Knerr, Henning; Dilly, Timo C.; Schäfer, Michael et al

in Wasser und Abfall (2017)

Detailed reference viewed: 102 (3 UL)
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See detailPotenzialità e limiti dei recenti interventi in tema di servizi ispettivi
Ratti, Luca UL

in Perulli, A.; Fiorillo, L. (Eds.) Rapporto individuale e processo del lavoro (2014)

Detailed reference viewed: 35 (0 UL)
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See detailPotenziellen und Gefahren der IBA als Planungsinstrument
Carr, Constance UL

Scientific Conference (2014)

Detailed reference viewed: 145 (21 UL)
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See detailThe Poulidor distance-bounding protocol
Trujillo Rasua, Rolando UL; Martin, Benjamin; Avoine, Gildas

in Radio Frequency Identification: Security and Privacy Issues - 6th International Workshop (RFIDSec 2010) (2010)

Detailed reference viewed: 87 (1 UL)
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See detailPour aller au-delà des incertitudes épistémologiques : une validation de cohérence entre des données existantes et le construit théorique du concept de « health capability » adapté aux aidants familiaux
Bucki, Barbara UL; Baumann, Michèle UL

in XIXè Congrès International de Sociologie (2012)

Une étude dont le questionnaire, adressé à 62 aidants familiaux, porte sur les répercussions émotionnelles, sociales et familiales d’un accident vasculaire cérébral (AVC) survenu deux ans auparavant, a ... [more ▼]

Une étude dont le questionnaire, adressé à 62 aidants familiaux, porte sur les répercussions émotionnelles, sociales et familiales d’un accident vasculaire cérébral (AVC) survenu deux ans auparavant, a été reprise en tentant d’approcher le concept novateur de « health capability ». Le chercheur devant s’interroger sur la pertinence des construits théoriques, notre hypothèse a été qu’il existe un recouvrement probable entre les thèmes explorés dans l’étude AVC et les dimensions de health capabilty. Une validation de cohérence effectuée par deux chercheures a confirmé cette hypothèse : 129/164 items ont pu être répartis dans 14 des 15 dimensions du concept à l’étude. Cette répartition met en lumière les informations de l’enquête qui couvrent partiellement le construit théorique et les dimensions restant inexplorées. Des entretiens semi-structurés suivis d’une analyse qualitative des discours seront réalisés afin d’identifier le sens des contenus. Lors de notre communication, nous présenterons, à l’aide d’exemples, les étapes de cette réflexion que nous avons menée pour faire face, mais aussi pour aller au-delà des incertitudes apparentes. Puis nous discuterons de l’intérêt d’une telle démarche de va-et-vient entre un concept emprunté à la littérature et une base de données issue d’une étude mise à notre disposition. Nous mettrons en évidence l’importance de penser l’incertain épistémologique afin de mieux appréhender la compréhension contextualisée de concepts émergents. [less ▲]

Detailed reference viewed: 99 (4 UL)
See detailPour le développement d'une approche sociologique du climat scolaire
Weis, Christiane UL

Dissertation and these (2008)

Detailed reference viewed: 42 (2 UL)