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See detailDigitized-counterdiabatic quantum approximate optimization algorithm
Chandarana, P.; Hegade, N. N.; Paul, K. et al

in Physical Review Research (2021)

The quantum approximate optimization algorithm (QAOA) has proved to be an e ective classical-quantum algorithm serving multiple purposes, from solving combinatorial optimization problems to finding the ... [more ▼]

The quantum approximate optimization algorithm (QAOA) has proved to be an e ective classical-quantum algorithm serving multiple purposes, from solving combinatorial optimization problems to finding the ground state of many-body quantum systems. Since QAOA is an ansatz-dependent algorithm, there is always a need to design ansatz for better optimization. To this end, we propose a digitized version of QAOA enhanced via the use of shortcuts to adiabaticity. Specifically, we use a counterdiabatic (CD) driving term to design a better ansatz, along with the Hamiltonian and mixing terms, enhancing the global performance. We apply our digitizedcounterdiabatic QAOA to Ising models, classical optimization problems, and the P-spin model, demonstrating that it outperforms standard QAOA in all cases we study. [less ▲]

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See detailL’émergence de la nouvelle diplomatie luxembourgeoise - enjeux, stratégies, personnalités
Danescu, Elena UL; Schroeder, Corinne; Schmit, Paul et al

Presentation (2021, June 30)

Dans le contexte des nouvelles relations internationales forgées par la Seconde Guerre mondiale, le Grand-Duché de Luxembourg s’affirme comme un acteur de marque du multilatéralisme, en tant que membre ... [more ▼]

Dans le contexte des nouvelles relations internationales forgées par la Seconde Guerre mondiale, le Grand-Duché de Luxembourg s’affirme comme un acteur de marque du multilatéralisme, en tant que membre fondateur de la plupart des grandes institutions internationales - l’Organisation des Nations unies (1945), l’Organisation du traité de l’Atlantique du Nord (1949), le Conseil de l’Europe (1949),- ainsi que de l’intégration européenne, à commencer par la Communauté européenne du Charbon et de l’Acier (1951), dont les premières institutions sont accueillies à Luxembourg. L’adhésion aux systèmes d’alliances atlantique et européennes s’accompagne d’une nouvelle politique extérieure luxembourgeoise sous l’impulsion du légendaire ministre des Affaires étrangères Joseph Bech (1887-1975). Après la Libération, il porte une attention particulière à l’organisation institutionnelle du ministère des Affaires étrangères, à la professionnalisation de la diplomatie nationale et à la formation d’un corps diplomatique d’excellence, pour représenter le pays dans le monde, pour promouvoir ses valeurs et pour défendre ses intérêts à travers la coopération internationale bi- et multilatérale. [less ▲]

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See detailNew Field, Old Practices: Promises and Challenges of Public History
Cauvin, Thomas UL

in magazén | International Journal for Digital and Public Humanities (2021), 2(1), 13-44

lthough public history is becoming increasingly international, the field remains difficult to define and subject to some criticism. Based on sometimes long-established public practices, public history ... [more ▼]

lthough public history is becoming increasingly international, the field remains difficult to define and subject to some criticism. Based on sometimes long-established public practices, public history displays new approaches to audiences, collaboration and authority in history production. This article provides an overview of public history, its various definitions and historiography, and discusses some of the main criticisms of the field. Public history is compared to a tree of knowledge whose parts (roots, trunk, branches and leaves) represent the many collaborative and interconnected stages in the field. Defining public history as a systemic process (tree) demonstrates the need for collaboration between the different actors – may they be trained historians or not – and aim to focus on the role they play in the overall process. The future of international public history will involve balancing practice-based approaches with more theoretical discussions on the role of trained historians, audiences and different uses of the past. [less ▲]

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See detailLeveraging Execution Logs to Support Model Inference and Software Testing
Messaoudi, Salma UL

Doctoral thesis (2021)

Many software engineering activities process the events contained in log files. However, before performing any processing activity, it is necessary to correctly parse the entries in a log file to retrieve ... [more ▼]

Many software engineering activities process the events contained in log files. However, before performing any processing activity, it is necessary to correctly parse the entries in a log file to retrieve the actual events recorded in the log. In the case of cyber-physical systems, execution logs are highly important because such systems integrate multiple third-party components where their source code is not always available. This limits the visibility of the system behavior to what is collected in the execution logs. The increasing amount of logs produced by cyber-physical systems calls for 1) more advanced techniques for accurate log parsing, 2) scalable model inference that will enabling efficient program comprehension and, 3) cost-effective software testing to ensuring the quality of complex soft- ware systems. [less ▲]

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See detailInteractions between large molecules pose a puzzle for reference quantum mechanical methods
Yasmine S. Al-Hamdani; Péter R. Nagy; Andrea Zen et al

in Nature Communications (2021)

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See detailDiscovering Pesticides, Pharmaceuticals TPs in Luxembourg Waters using Open Cheminformatics Approaches
Krier, Jessy; Singh, Randolph R.; Kondic, Todor UL et al

Scientific Conference (2021, June 24)

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See detailChallenging the Status Quo: Citizens’ Access to Justice to Protect a Healthy Environment in Europe
Muñoz, Susana UL

Scientific Conference (2021, June 22)

The EU and its Member States must guarantee the respect of citizens’ right of access to environmental information, public participation in decision-making and access to justice in environmental matters ... [more ▼]

The EU and its Member States must guarantee the respect of citizens’ right of access to environmental information, public participation in decision-making and access to justice in environmental matters. Nevertheless, no framework for access to justice in the EU Member States exists. On 14 October 2020, the European Commission adopted a legislative proposal amending the Aarhus Regulation as part of the European Green Deal. The aim is to strengthen the EU’s system of access to justice in environmental matters, including the role of the Member States and national courts. Drawing on European and national case law and legislation, this paper provides a critical review of the current application of access to justice and the proposed amendments. It further explores legal avenues for strengthening the citizens’ access to justice within the multilevel protection of a healthy environment in Europe. [less ▲]

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See detailLuxembourg: from steel to the knowledge economy and beyond
Danescu, Elena UL; Clément, Franz; Golini, Sonia

Presentation (2021, June 22)

Despite its small size in terms of geography (2,586km2) and population (626,100 people on 1 January 2020), Luxembourg has an open, dynamic, innovative economy that is one of the most successful at ... [more ▼]

Despite its small size in terms of geography (2,586km2) and population (626,100 people on 1 January 2020), Luxembourg has an open, dynamic, innovative economy that is one of the most successful at international level – in 2019 its GDP per capita was 261% the European average and its growth rate was the third highest of the EU’s then 28 Member States – and also one of the least affected by the COVID-19 crisis. This can be explained by its sector-based structure, in which activities and services related to the financial centre, together with information and communication technologies, transport and non-market services, play a key role; by the existence of a highly qualified, multilingual, mobile (cross-border) workforce; and also by the proactive economic policy pursued by the country’s authorities throughout its history. Looking back, we can see that Luxembourg has gone through several transitions and dealt with a number of serious crises. Following on from the predominantly rural economy of the 19th century, the first half of the 20th century was characterised by an industrial economy based on the iron and steel industry and the latter part of the century by a service-based economy centred around the financial centre, ultimately leading to the emergence of an information and knowledge economy which is gradually taking shape in the 21st century. References. 1)STATEC (2021), “Luxembourg in figures, 2020”. Source: https://statistiques.public.lu/catalogue-publications/luxembourg-en-chiffres/2020/luxembourg-figures.pdf; 2). To find out more about the historical development of the Luxembourg economy, see Gérard Trausch (2012), “Les mutations économiques et sociales de la société luxembourgeoise depuis la révolution française [less ▲]

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See detailThe Educational Economics of UNESCO's First Regional Centre on Fundamental Education in the Immediate Post-War Period: An Archival Exploration
Kesteloot, Stefanie UL

Scientific Conference (2021, June 21)

The end of the Second World War marked the start of a new era, with worldwide support for a Universal Declaration of Human Rights (UDHR) in December 1948. By signing the Universal Declaration, the Member ... [more ▼]

The end of the Second World War marked the start of a new era, with worldwide support for a Universal Declaration of Human Rights (UDHR) in December 1948. By signing the Universal Declaration, the Member States of the United Nations pledged to promote a series of universal values. As part of the UN, UNESCO made a major effort to disseminate the Declaration and its content globally, at a national, regional and local level. The idea of “building peace in the minds of men and women” and encouraging equal rights was central to UNESCO’s mission. An archival exploration of the correspondence material of UNESCO’s secretariat, available at the UNESCO archives, offers an insight into the continuous struggle faced by the staff for the creation and implementation of educational initiatives on human rights. One focus of UNESCO’s work was the area of fundamental education. Early general correspondence found related to this topic reveals the continuous flow of communication between the different UNESCO departments, especially the office of the Director-General and the Departments of Mass Communication and Education. The discussions were mainly centred on the development of centres for fundamental education. The location to choose, the content and methodology to use, and the appropriate strategy to raise the funds needed for the continued implementation of regional centres of fundamental education, were just some of the issues addressed. The initial financial and ideological support from the Member States seems to have been slowly replaced by budgetary constraints and political opposition. A network of international experts on fundamental education helped promote UNESCO’s initiatives to possible funders with a view to creating twelve fundamental education centres all over the world. Their contribution was seen as vital for the implementation of the project. Despite the hard work and lobbying activities, only two of the initially planned twelve centres were established. Through this focus on fundamental education, I will argue that, despite the worldwide support for this philosophical and humanistic ideal, political and economic interests soon came to dominate the transition of this initial project to local communities, creating imbalances in relations within and between nations. Consequently, the dissemination and promotion of the UDHR was subject to a wide range of individual translations by UNESCO’s Member States. This only enlarged the difficult task for the intergovernmental organisation to mediate the development of peace in the minds of men and women. [less ▲]

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See detailPourquoi faut-il contenir la course aux armements dans l'espace
Zarkan, Laetitia UL; Azcárate Ortega, Almudena; Revill, James

Article for general public (2021)

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See detailThe gap in Covid-19 memory banks: on the use and usefulness of rapid response collections
Zumthurm, Tizian UL

Scientific Conference (2021, June 18)

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See detailOpen Science @LCSB-ECI
Schymanski, Emma UL

Presentation (2021, June 17)

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See detailSOCIAL NETWORK ANALYSIS FOR DIGITAL HUMANITIES
Fiscarelli, Antonio Maria UL

Doctoral thesis (2021)

Current trends in academia show that a key factor for tackling complex problems and doing successful research is interdisciplinarity. With the increasing availability of digital tools and online databases ... [more ▼]

Current trends in academia show that a key factor for tackling complex problems and doing successful research is interdisciplinarity. With the increasing availability of digital tools and online databases, many disciplines in the humanities and social sciences are seeking to incorporate computational techniques in their research workflow. Digital humanities (DH) is a collaborative and interdisciplinary area of research that bridges computing and the humanities disciplines, bringing digital tools to humanities scholars to use, together with a critical understanding of such tools. Social network analysis is one of such tools. Social network analysis focuses on relationships among social actors and it is an important addition to standard social and behavioral research, which is primarily concerned with attributes of the social units. In this work we present the field of digital humanities and its current challenges, as well as an overview of the most recent trends in historical network research, emphasizing the advantages of using social network analysis in history and the missed opportunities. We then present the field of network analysis, providing a formalization of the concept of social network, models that explain the mechanism governing complex networks and tools such as network metrics, orbit analysis and Exponential Random Graph Model. We tackle the problem of community detection. We propose MemLPA, a new version of the label propagation algorithm, by incorporating a memory element, in order for nodes to consider past states of the network in their decision rule. We present a use case, drawn from the collaboration with a historian colleague, showing how social network analysis can be used to answer research questions in history. In particular, we addressed the gender and ethnic bias problem in computer science research by looking at different collaboration patterns in the temporal co-authorship network. Finally, we present another use case, based on collaboration data collected at the National Electronics and Computer Technology Center (NECTEC) in Thailand. We build a temporal collaboration network where researchers are connected if they worked together on one or more artifacts, focusing on measuring productivity and quality of research and development, while linking these metrics to the structure of the collaboration network. [less ▲]

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See detailAWJC Nozzle simulation by 6-way coupling of DEM+CFD+FEM using preCICE coupling library
Adhav, Prasad UL; Besseron, Xavier UL; ROUSSET, Alban et al

Scientific Conference (2021, June 16)

The objective of this work is to study the particle-laden fluid-structure interaction within an Abrasive Water Jet Cutting Nozzle. Such coupling is needed to study the erosion phenomena caused by the ... [more ▼]

The objective of this work is to study the particle-laden fluid-structure interaction within an Abrasive Water Jet Cutting Nozzle. Such coupling is needed to study the erosion phenomena caused by the abrasive particles inside the nozzle. So far, the erosion in the nozzle was predicted only through the number of collisions, using only a simple DEM+CFD[1] coupling. To improve these predictions, we extend our model to a 6-way Eulerian-Lagrangian momentum coupling with DEM+CFD+FEM to account for deformations and vibrations in the nozzle. Our prototype uses the preCICE coupling library[2] to couple 3 numerical solvers: XDEM[3] (for the particle motion), OpenFOAM[4] (for the water jet), and CalculiX[5] (for the nozzle deformation). XDEM handles all the particle motions based on the fluid properties and flow conditions, and it calculates drag terms. In the fluid solver, particles are modeled as drag and are injected in the momentum equation as a source term. CalculiX uses the forces coming from the fluid solver and XDEM as boundary conditions to solve for the displacements. It is also used for computing the vibrations induced by particle impacts. . The preliminary 6-way DEM+CFD+FEM coupled simulation is able to capture the complex particle-laden multiphase fluid-structure interaction inside AWJC Nozzle. The erosion concentration zones are identified and are compared to DEM+CFD coupling[1]. The results obtained are planned to be used for predicting erosion intensity in addition to the concentration zones. In the future, we aim to compare the erosions predictions to experimental data in order to evaluate the suitability of our approach. The FEM module of the coupled simulation captures the vibration frequency induced by particles and compares it with the natural frequency of the nozzle. Thus opening up opportunities for further investigation and improvement of the Nozzle design. [less ▲]

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