Last 7 days
Bookmark and Share    
Full Text
Peer Reviewed
See detailBetting Against Noisy Beta
Lehnert, Thorsten UL

in Journal of Finance and Data Science (2022), 8(-), 55-68

Detailed reference viewed: 59 (5 UL)
Full Text
Peer Reviewed
See detailAUSLEGUNG eines BIOMECHANISCHEN TESTSTANDES für das BECKEN einschließlich der MUSKELKRÄFTE des GANGZYKLUS
Soliman, Ahmed Abdelsalam Mohamed UL; Ricci, Pierre-Louis; Kedziora, Slawomir UL et al

Scientific Conference (2022, October 28)

Detailed reference viewed: 54 (1 UL)
See detailJack of All Trades - Stolz und Hilflosigkeit
Richter, Daniel UL

Article for general public (2022)

Detailed reference viewed: 39 (0 UL)
See detailAustralian Indigenous Life Writing: Analysing Discourses with Word Embedding Modelling
Kamlovskaya, Ekaterina UL

Doctoral thesis (2022)

The genre of Australian Aboriginal autobiography is a literature of significant socio-political importance, with authors sharing a history different to the one previously asserted by the European settlers ... [more ▼]

The genre of Australian Aboriginal autobiography is a literature of significant socio-political importance, with authors sharing a history different to the one previously asserted by the European settlers which ignored or misrepresented Australia's First People. While there has been a number of studies looking at the works belonging to this genre from various perspectives, Australian Indigenous life writing has never been approached from the digital humanities point of view which, given the constant development of computer technologies and growing availability of digital sources, offers humanities researchers many opportunities for exploring textual collections from various angles. With this research work I contribute to closing the above-mentioned research gap and discuss the results of the interdisciplinary research project within the scope of which I created a bibliography of published Australian Indigenous life writing works, designed and assembled a corpus and created word embedding models of this corpus which I then used to explore the discourses of identity, land, sport, and foodways, as well as gender biases present in the texts in the context of postcolonial literary studies and Australian history. Studying these discourses is crucial for gaining a better understanding of the contemporary Australian society as well as the nation's history. Word embeddings modelling has recently been used in digital humanities as an exploratory technique to complement and guide traditional close reading approaches, which is justified by their potential to identify word use patterns in a collection of texts. In this dissertation, I provide a case study of how word embedding modelling can be used to investigate humanities research questions and reflect on the issues which researchers may face while working with such models, approaching various aspects of the research project from the perspectives of digital source and tool criticism. I demonstrate how word embedding model of the analysed corpus represents discourses through relationships between word vectors that reflect the historical, political, and cultural environment of the authors and some unique experiences and perspectives related to their racial and gender identities. I show how the narrators reconstruct the analysed discourses to achieve the main goals of Australian Indigenous life writing as a genre - reclaiming identity and rewriting history. [less ▲]

Detailed reference viewed: 78 (11 UL)
See detailPaper and ink in the Soviet camp 188 in Tambov: capturing the camp life of Luxembourger conscripts
Ganschow, Inna UL

Speeches/Talks (2022)

In the talk by Inna Ganschow, the camp experience in the Soviet Union will be treated as a consequence of the forced conscription, namely in its artistic processing. Secretly written diaries and letters ... [more ▼]

In the talk by Inna Ganschow, the camp experience in the Soviet Union will be treated as a consequence of the forced conscription, namely in its artistic processing. Secretly written diaries and letters of Luxembourg Wehrmacht soldiers or poems of deceased comrades learned by them by heart, they also reached their homeland. The camp literature, which has its roots in the prison and prisoner of war literature, has a dimension of the documentary speaking about the Luxembourger conscripts in the Soviet detention 1943-1953, which as a text genre does not always fall under the term "literature" meaning "fiction". Ego documents, as contemporary history researchers call them today, represent private, handwritten texts of a personal nature. The range of texts to be examined in the presentation ranges from the smuggled out notes and letters that their released comrades took with them to Luxembourg the diaries, speeches and self-made dictionaries to poetry, short stories and drawings, some of which were created in the camp and some immediately after returning from Tambov and other camps in the Soviet Union. Going through these few valuable pieces of paper from 1943 to 1946 and collecting them as a catalog of the genres, the presentation will show, how the biographies and the methods used by the writers of the texts managed to capture or to record the camp life. The question that is in the foreground is the examination of the thesis of the Auschwitz concentration camp survivor Viktor Frankl, a psychiatrist and neurologist from Vienna, that giving meaning to life in the camp - logotherapy - can have a self-healing effect and increase the chances of survival. The written texts of the Luxemburgers in the Soviet camps in Russia as well as in East Germany or Poland are considered with this possible intention in mind that the writing helped to give meaning to the life, suffering and destiny of their authors. The focus of the talk lies on leitmotifs, images and topoi, which the authors use, consciously or unconsciously, to find the necessary spiritual support and (re)gain the feeling of being in control of their own lives. [less ▲]

Detailed reference viewed: 20 (0 UL)
Full Text
Peer Reviewed
See detailBiomechanische Untersuchung zu verschiedenen Verfahren der Stabilisierung von Insuffizienzfrakturen des vorderen Beckenringes
Gerich, Torsten; Soliman, Ahmed Abdelsalam Mohamed UL; Ricci, Pierre-Louis et al

Poster (2022, October 26)

Detailed reference viewed: 25 (2 UL)
See detailMobiler Messkoffer - Energie sparen mit innovativen digitalen Technologien
Hilger, Lukas UL; Scholzen, Frank UL; Schneiders, Thorsten

Article for general public (2022)

Innovative digitale Technologien bieten kleinen und mittleren Unternehmen (KMU) neue Möglichkeiten, ihre Energieeffizienz und ihr Energiemanagement zu verbessern. Allerdings ist unklar, inwieweit KMU in ... [more ▼]

Innovative digitale Technologien bieten kleinen und mittleren Unternehmen (KMU) neue Möglichkeiten, ihre Energieeffizienz und ihr Energiemanagement zu verbessern. Allerdings ist unklar, inwieweit KMU in der Lage sind, von den Vorteilen dieser neuen Technologien zu profitieren und diese optimal für sich zu nutzen. Das Forschungsprojekt „Smarte Technologien für Unternehmen“ hat deshalb praxisorientierte Schritte und Lösungsansätze für KMU entwickelt. [less ▲]

Detailed reference viewed: 28 (1 UL)
Full Text
See detailMicroglia signatures in the hippocampus of Alzheimer's Disease and Dementia with Lewy bodies patients
Fixemer, Sonja UL

Doctoral thesis (2022)

Worldwide more than 55 million people are suffering from incurable age-related neurodegenerative diseases and associated dementia, including Alzheimer’s Disease (AD) and Dementia with Lewy bodies (DLB ... [more ▼]

Worldwide more than 55 million people are suffering from incurable age-related neurodegenerative diseases and associated dementia, including Alzheimer’s Disease (AD) and Dementia with Lewy bodies (DLB). AD and DLB patients share memory impairment symptoms but present specific deterioration patterns of the hippocampus, a brain region essential for memory processes. Notably, the CA1 subregion is more vulnerable to atrophy in AD patients than in DLB patients. However, it remains unclear which factors contribute to this differential subregional vulnerability. On the neuropathological level, both AD and DLB patients frequently present an overlap of misfolded protein pathologies with AD-typical pathologies including extracellular amyloid-β (Aβ) plaques and neurofibrillary tangles (NFTs) of hyperphosphorylated tau protein (pTau), and DLB-typical pathological inclusions of phosphorylated 𝛼-synuclein (pSyn). Recent genome-wide association studies (GWAS) have revealed many genetic AD risk factors that are directly linked to microglia and suggest that they play an active role in pathology. However, how microglia alterations are linked to local pathological environments and which role microglia subpopulations play in specific vulnerability patterns of the hippocampus in AD and DLB remains poorly understood. This PhD thesis addressed two main aspects of microglia alterations in the post-mortem hippocampus of AD and DLB patients. The first study provided a very detailed and 3D characterization of microglia alterations at individual cell levels across CA1, CA3 and DG/CA4 subfields; and their local association with concomitant pTau, Aβ and pSyn loads across AD and DLB. We show that the co-occurrence of these three different types of misfolded proteins is frequent and follows specific subregional patterns in both diseases but is more severe in AD than DLB cases. Our results suggest that high burdens of pTau and pSyn associated with increased microglial alterations could be associated to the CA1 vulnerability in AD. Our second study provided an morphological and molecular characterization of a type of microglia accumulations referred to as coffin-like microglia (CoM), using high- and super-resolution microscopy as well as digital spatial profiling. We showed that CoM were enriched in the pyramidal layer of CA1/CA2 and were not linked to Aβ plaques, but occasionally engulfed or contained NFTs or intraneuronal granular pSyn inclusions. Furthermore, CoM are not surrounded by hypertrophic reactive astrocytes like plaque-associated microglia (PAM), but rather by dystrophic astrocytic processes. We found that proteomic and transcriptomic signatures of CoM point toward cellular senescence and immune cell infiltration, while PAM signatures indicate oxido-reductase activity and lipid degradation. Our studies provide new insights in complex signatures of human microglia in the hippocampus of age-related neurodegenerative diseases. [less ▲]

Detailed reference viewed: 48 (4 UL)
Full Text
Peer Reviewed
See detailCalcGraph: taming the high costs of deep learning using models
Lorentz, Joe UL; Hartmann, Thomas UL; Moawad, Assaad UL et al

in Software and Systems Modeling (2022)

Models based on differential programming, like deep neural networks, are well established in research and able to outperform manually coded counterparts in many applications. Today, there is a rising ... [more ▼]

Models based on differential programming, like deep neural networks, are well established in research and able to outperform manually coded counterparts in many applications. Today, there is a rising interest to introduce this flexible modeling to solve real-world problems. A major challenge when moving from research to application is the strict constraints on computational resources (memory and time). It is difficult to determine and contain the resource requirements of differential models, especially during the early training and hyperparameter exploration stages. In this article, we address this challenge by introducing CalcGraph, a model abstraction of differentiable programming layers. CalcGraph allows to model the computational resources that should be used and then CalcGraph’s model interpreter can automatically schedule the execution respecting the specifications made. We propose a novel way to efficiently switch models from storage to preallocated memory zones and vice versa to maximize the number of model executions given the available resources. We demonstrate the efficiency of our approach by showing that it consumes less resources than state-of-the-art frameworks like TensorFlow and PyTorch for single-model and multi-model execution. [less ▲]

Detailed reference viewed: 20 (0 UL)
Full Text
Peer Reviewed
See detailLearning to Grasp on the Moon from 3D Octree Observations with Deep Reinforcement Learning
Orsula, Andrej UL; Bøgh, Simon; Olivares Mendez, Miguel Angel UL et al

Scientific Conference (2022, October 24)

Extraterrestrial rovers with a general-purpose robotic arm have many potential applications in lunar and planetary exploration. Introducing autonomy into such systems is desirable for increasing the time ... [more ▼]

Extraterrestrial rovers with a general-purpose robotic arm have many potential applications in lunar and planetary exploration. Introducing autonomy into such systems is desirable for increasing the time that rovers can spend gathering scientific data and collecting samples. This work investigates the applicability of deep reinforcement learning for vision-based robotic grasping of objects on the Moon. A novel simulation environment with procedurally-generated datasets is created to train agents under challenging conditions in unstructured scenes with uneven terrain and harsh illumination. A model-free off-policy actor-critic algorithm is then employed for end-to-end learning of a policy that directly maps compact octree observations to continuous actions in Cartesian space. Experimental evaluation indicates that 3D data representations enable more effective learning of manipulation skills when compared to traditionally used image-based observations. Domain randomization improves the generalization of learned policies to novel scenes with previously unseen objects and different illumination conditions. To this end, we demonstrate zero-shot sim-to-real transfer by evaluating trained agents on a real robot in a Moon-analogue facility. [less ▲]

Detailed reference viewed: 51 (16 UL)
Peer Reviewed
See detailImpacting the computerization and Digitalization in Luxembourg: the case of teachers and education
Noguera, Carmen UL

Scientific Conference (2022, October 21)

Detailed reference viewed: 12 (1 UL)
Full Text
See detailClassification and detection of Critical Transitions: from theory to data
Proverbio, Daniele UL

Doctoral thesis (2022)

From population collapses to cell-fate decision, critical phenomena are abundant in complex real-world systems. Among modelling theories to address them, the critical transitions framework gained traction ... [more ▼]

From population collapses to cell-fate decision, critical phenomena are abundant in complex real-world systems. Among modelling theories to address them, the critical transitions framework gained traction for its purpose of determining classes of critical mechanisms and identifying generic indicators to detect and alert them (“early warning signals”). This thesis contributes to such research field by elucidating its relevance within the systems biology landscape, by providing a systematic classification of leading mechanisms for critical transitions, and by assessing the theoretical and empirical performance of early warning signals. The thesis thus bridges general results concerning the critical transitions field – possibly applicable to multidisciplinary contexts – and specific applications in biology and epidemiology, towards the development of sound risk monitoring system. [less ▲]

Detailed reference viewed: 75 (10 UL)
Peer Reviewed
See detail“Small is impactful”. Memes and Politics
Pailler, Fred UL; Schafer, Valerie UL

Scientific Conference (2022, October 20)

From the Hampster Dance and the Dancing Baby in the second half of the 1990s to the hijacking meme of Bernie and his mittens at the US presidential inauguration or the images of the Evergreen blocked in ... [more ▼]

From the Hampster Dance and the Dancing Baby in the second half of the 1990s to the hijacking meme of Bernie and his mittens at the US presidential inauguration or the images of the Evergreen blocked in the Suez Canal, memes have become in the last twenty years an important part of our digital cultures (Shifman, 2014), whose often absurd, playful, corrosive and viral character cannot hide also multiple political dimensions. To the question "Do Memes have politics", to paraphrase Langdon Winner (1980), the answer is undoubtedly yes and this presentation aims to analyse the many levels of politics and agencies at stake when studying memes and their impact, in terms of digital cultures, governance, curation, sharing (John, 2017), appropriation by several communities, but also writing of their history. The first part of the presentation unfolded several levels of politics, starting with the most obvious (memes address political aspects, see for example Denisova, 2019 or Askanius and Keller, 2021) to the more hidden levels (politics of meme generators, of heritagization platform like Know your Meme (Pettis, 2021), of curation …). Relying on a diachronic approach, from the Godwin Law to Distracted Boyfriend, through Leave Britney Alone, this part aimed to address both complementary sides of these Internet phenomena: memes as political forms and politics of memes, while underlying some economic, gendered, affective dimensions which are part of their impact. We then examined the consequences of the notion of “impact” and “politics” for the shaping of an history of memes, which is at stake in the Hivi (A history of online virality) project, we are currently conducting, may it be in terms of sources, methods (“scalable” and “medium” reading), or topics (notably claiming for a study of circulation and flow (Jenkins, 2009), of processes, of participation (Milner, 2018) and appropriation, beyond a sole semiotic approach of memes). References Tina Askanius, Nadine Keller, “Murder fantasies in memes: fascist aesthetics of death threats and the banalization of white supremacist violence”, Information, Communication & Society, 2021, vol. 0, n° 0, p. 1 18. Anastasia Denisova, Internet memes and society: social, cultural, and political contexts, New York, Routledge, 2019. Nicholas A. John, The age of sharing, Cambridge, Polity Press, 2017. Henry Jenkins, If It Doesn’t Spread, It’s Dead (Part One): Media Viruses and Memes, 2009 (http://henryjenkins.org/blog/2009/02/if_it_doesnt_spread_its_dead_p.html). Ryan Milner, The world made meme: Public conversations and participatory media, Cambridge MA, The MIT Press, 2018. Ben Tadayoshi Pettis, “Know your Meme and the Homogeneization of Web History”, Internet Histories, 2021 (to be soon published). Limor Shifman, Memes in digital culture, Cambridge MA, The MIT Press, 2014. Langdon Winner, “Do artifacts have politics ?”, Daedalus, vol. 109, n°1, 1980, p. 121-136. [less ▲]

Detailed reference viewed: 49 (1 UL)
Peer Reviewed
See detail“Challenge accepted”. The many sources to catch the history of virality and memes
Schafer, Valerie UL

Scientific Conference (2022, October 20)

Gifs and memes (Kaplan and Nova, 2016), “buzz” on the Web and social networks are inherent to digital cultures since the very first steps of the Web (i.e., Godwin’s Law, Dancing babies, Hamster Dance, cf ... [more ▼]

Gifs and memes (Kaplan and Nova, 2016), “buzz” on the Web and social networks are inherent to digital cultures since the very first steps of the Web (i.e., Godwin’s Law, Dancing babies, Hamster Dance, cf. McGrath, 2019). Virality has developed and changed over time, may it be related to forms (macro images, videos, etc.) and platforms (YouTube, 4Chan, Twitter, TikTok, etc.), audiences, curation and dissemination (with features encouraging spreadability within social platforms), etc., while relying on some patterns that were identified by Shifman (2014), Milner (2018), Jenkins (2009) and others. However, history and diachronic approaches still remain underrepresented in studies of online virality, although Finn Brunton’s Spam, Jason Eppink’s visual history of gifs (2014), or the Memes entry in The Sage Handbook of Web History (McGrath, 2019) can be mentioned. Historicizing virality through times, spaces and platforms is at the heart of the Hivi project at C2DH, University of Luxembourg (https://hivi.uni.lu). While starting to historicize these “Internet phenomena”, may it be Numa Numa Guy, Leave Britney Alone, Grumpy Cat, the Harlem Shake, Distracted Boyfriends, etc., challenges related to sources become more and more obvious: researchers have to deal with ephemerality as well as data overload, with several spaces of heritagization on the live and archived web, with gaps, silences and noises, issues of searchability in web archives, etc. This presentation focused on a case study, the Harlem Shake, to first demonstrate the variety of sources and spaces (physical and digital) that may be used to retrieve and rebuild this phenomenon (i.e., press, audiovisual content, archived web in several institutions, live web and platforms, etc.). It then presented the challenges related to this kind of reconstruction that is also strongly intertwining vernacular and commercial cultures; sound, video, textual contents; local as well as international spaces, etc. [less ▲]

Detailed reference viewed: 36 (0 UL)
See detailSpecial ECREA panel : Rethinking digital sources — making web archives useful for future scholars
Schafer, Valerie UL

Scientific Conference (2022, October 20)

The aim of this panel was to draw attention to the large number of archived web collections, and to rethink the challenges and possibilities that they constitute for studies of past and present mediated ... [more ▼]

The aim of this panel was to draw attention to the large number of archived web collections, and to rethink the challenges and possibilities that they constitute for studies of past and present mediated communication. The point of departure is the international network WARCnet, Web ARChive studies net- work researching web domains and events (warcnet.eu), that is composed of humanities scholars, IT-developers, and web archivists, and that aims at promoting national and transnational research that will help us to understand the history of (trans)national web domains and of transnational events on the web, drawing on the increasingly important digital cultural heritage held in national web archives. [less ▲]

Detailed reference viewed: 29 (1 UL)
See detailFrontières contestées dans l’espace Schengen à l’exemple de la pandémie
Wille, Christian UL

Presentation (2022, October 20)

Malgré la libre circulation dans l’espace Schengen, la frontiérisation s’est propagée aux régions frontalières en Europe, au plus tard avec la pandémie du Covid-19. Les travaux menés jusqu’à présent sur ... [more ▼]

Malgré la libre circulation dans l’espace Schengen, la frontiérisation s’est propagée aux régions frontalières en Europe, au plus tard avec la pandémie du Covid-19. Les travaux menés jusqu’à présent sur les fermetures de frontières dans le cadre de la pandémie montrent que les études sur le covidfencing portent principalement sur des questions socio-économiques, de gouvernance et sur la gestion de crise. Le quotidien des habitants des régions frontalières, leur vécu des événements et les identités face à l’autre sont peu pris en compte. La communication traite cette dimension de culture quotidienne pendant la pandémie et analyse la dynamique de rebordering et debordering. Pour ce faire, les exemples de contestation du covidfencing à la frontière luxo-allemande, franco-allemande et germano-polonaise seront discutées en tant que people’s resilience. Ce dernier comprend des protestations, des solidarités ou des actions symboliques qui mettent en évidence les actes de contestation des frontiérisations par les acteurs civils. Les dynamiques de frontiérisation sont des phénomènes récents dans les régions frontalières en Europe et ne sont pas encore pris en compte dans l’étude des régions frontalières. Cependant, il faut s’attendre qu’après la pandémie, les frontiérisations dans les réalités de vie au sein des régions frontalières resteront pertinentes et continuerons à faire l’objet des contestations par ses habitants. L’unilatéralisme politique, l’euroscepticisme persistant ou la montée du populisme dans un contexte de flux migratoires continus n’en sont quelques des facteurs décisifs. C’est dans ce contexte qu’en conclusion seront présentées des perspectives pour l’étude des régions frontalières à l’ère de frontiérisation. [less ▲]

Detailed reference viewed: 18 (0 UL)