cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Interevent time distributions of human multi-level activity in a virtual world
Creators: name: Mryglod, Olesya
name: Fuchs, Benedikt
name: Szell, Michael
name: Holovatch, Yurij
name: Thurner, Stefan
Publisher: name: arXiv
Year: 2014
Subjects: subject: Physics and Society (physics.soc-ph)
subject: Social and Information Networks (cs.SI)
subject: FOS: Physical sciences
subject: FOS: Computer and information sciences

description: Studying human behaviour in virtual environments provides extraordinary opportunities for a quantitative analysis of social phenomena with levels of accuracy that approach those of the natural sciences. In this paper we use records of player activities in the massive multiplayer online game Pardus over 1,238 consecutive days, and analyze dynamical features of sequences of actions of players. We build on previous work were temporal structures of human actions of the same type were quantified, and extend provide an empirical understanding of human actions of different types. This study of multi-level human activity can be seen as a dynamic counterpart of static multiplex network analysis. We show that the interevent time distributions of actions in the Pardus universe follow highly non-trivial distribution functions, from which we extract action-type specific characteristic "decay constants". We discuss characteristic features of interevent time distributions, including periodic patterns on different time scales, bursty dynamics, and various functional forms on different time scales. We comment on gender differences of players in emotional actions, and find that while male and female act similarly when performing some positive actions, females are slightly faster for negative actions. We also observe effects on the age of players: more experienced players are generally faster in making decisions about engaging and terminating in enmity and friendship, respectively.
description: 19 pages
SoK: Preventing Transaction Reordering Manipulations in Decentralized Finance
Creators: name: Heimbach, Lioba
name: Wattenhofer, Roger
Publisher: name: arXiv
Year: 2022
Subjects: subject: Cryptography and Security (cs.CR)
subject: Distributed, Parallel, and Cluster Computing (cs.DC)
subject: FOS: Computer and information sciences

description: User transactions on Ethereum's peer-to-peer network are at risk of being attacked. The smart contracts building decentralized finance (DeFi) have introduced a new transaction ordering dependency to the Ethereum blockchain. As a result, attackers can profit from front- and back-running transactions. Multiple approaches to mitigate transaction reordering manipulations have surfaced recently. However, the success of individual approaches in mitigating such attacks and their impact on the entire blockchain remains largely unstudied. In this systematization of knowledge (SoK), we categorize and analyze state-of-the-art transaction reordering manipulation mitigation schemes. Instead of restricting our analysis to a scheme's success at preventing transaction reordering attacks, we evaluate its full impact on the blockchain. Therefore, we are able to provide a complete picture of the strengths and weaknesses of current mitigation schemes. We find that currently no scheme fully meets all the demands of the blockchain ecosystem. In fact, all approaches demonstrate unsatisfactory performance in at least one area relevant to the blockchain ecosystem.
title: European Accessibility Act - Practice-based approaches to meeting accessibility requirements
Creators: name: Bittenbinder, Sven
name: Müller, Claudia
name: Tuncer, Zeynep
Publisher: name: GI
Year: 2023
Subjects: subject: Accessibility
subject: Human-Computer-Interaction
subject: Disability Studies
subject: Inklusion

description: The European Accessibility Act (EAA) sets accessibility requirements for a wide range of products and services provided by public bodies and private companies, the implementation of which in Germany is defined by the Barrierefreiheitsstärkungsgesetz (BFSG). Despite numerous approaches to make information and communication technologies (ICT) accessible, non-accessible software solutions still exist due to a lack of technical knowledge, resources and motivation. The workshop aims to discuss practical approaches and perspectives using HCI methods to support all stakeholders involved in the development of accessible ICT solutions, including end-users, decision-makers, designers, developers, quality assurance and companies as a whole. The prioritisation of accessibility needs to be rethought in the short term in order to meet the requirements of the BFSG (and thus the EAA). In particular, the individual needs and social contexts of socio-technical systems must be taken into account. The aim of the workshop is to gather and discuss different perspectives, opinions and approaches in an interdisciplinary combination of researchers, practitioners and directly and indirectly affected groups of people.
title: Pediatric cranio-facial lytic lesions: doubts and certainties from radiologist’s point of view
Creators: name: Carducci, Chiara
Publisher: name: European Congress of Radiology
Year: 2018
Subjects: subject: Education and training
subject: Education
subject: Diagnostic procedure
subject: Nuclear medicine conventional
subject: MR
subject: CT
subject: Paediatric
subject: Oncology
subject: Head and neck

description: Learning objectives Background Findings and procedure details Conclusion Personal information References
description: Learning objectives: Role of imaging in the diagnosis and follow-up of pediatric cranio-facial lytic lesions with a c ranio facial lytic lesions pattern overview. Case series with key diagnostic points highlighted in the discussion of each case. Up to date patterns and...
title: Choosing temporal freedom? How to investigate choice preference along an anisotropic dimension
Creators: name: Thomaschke, Roland
Publisher: name: GI
Year: 2023

description: In Computer users usually prefer scenarios where they can choose between options by themselves over scenarios where options are selected otherwise. Such choice preference has been demonstrated for several dimensions, like position, color etc., but not nor time. I speculate that this research gap is due to the traditional paradigms in choice preference research requiring choice options on the one hand to involve different waiting times but on the other hand to be of equal value to users. Yet, different points in time are inherently different in value – due to the anisotropy of time. I argue that this issue can be accounted for by countering the inherent value asymmetry of time by associating additional value to the option via a pre-experimental temporal learning procedure.
Thermonuclear Supernovae: Probing Magnetic Fields by Late-Time IR Line Profiles
Creators: name: Penney, R.
name: Hoeflich, P.
Publisher: name: arXiv
Year: 2014
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: We study the imprint of magnetic fields B on late-time IR line profiles and light curves of Type Ia Supernovae. As a benchmark, we use the explosion of a Chandrasekhar mass M_{Ch White Dwarf (WD) and, specifically, a delayed detonation model. We assume WDs with initial magnetic surface fields between 1 and 1E9G. We discuss large-scale dipole and small-scale magnetic fields. We find that the [Fe II] line at 1.644 mu can be used to analyze the overall chemical and density structure of the exploding WD up to day 200 without considering B. Subsequently, positron transport and magnetic field effects become important. By day 500, the profile becomes sensitive to the morphology of B and directional dependent for dipole fields. Small or no directional dependence of the spectra is found for small-scale B. After about 200 days, persistent broad-line, flat-topped or stumpy profiles require high density burning which is the signature of a WD close to M_Ch. Narrow peaked profiles are a signature of chemical mixing or sub-MCh WDs. Good time coverage is required to separate the effects of optical depth, the size and morphology of B, and the aspect angle of the observer. The spectra require a resolution of about 500 km/sec and a signal to noise ratio of about 20%. Line blending effect are demonstrated at the example of equally prominent features at about 1.5 and 1.8 mu. For some SNeIa, spectra beyond day 300 have been observed which lend support for M_Ch mass explosions in at least some cases, and require magnetic fields equal to or in excess of 1E6G. We briefly discuss the effects of the size and morphology of B on light curves and the limitations in light of the diversity of SNeIa. We argue that line profiles are a more direct measurement of B.
description: 16 pages with 10 figures, ApJ accepted
title: MRI of intraventricular tumors: a step-by-step diagnostic approach
Creators: name: Cucos, Maria
Publisher: name: European Congress of Radiology
Year: 2018
Subjects: subject: Neuroradiology brain
subject: MR
subject: Diagnostic procedure
subject: Neoplasia

description: Learning objectives Background Findings and procedure details Conclusion Personal information References
description: Learning objectives: To present a step-by-step approach of intraventricular tumors with MRI, based on a number of morphologic imaging criteria. To illustrate the imaging findings of the most commonly encountered intraventricular...
Lattice Anharmonicity in BiS2-Based Layered Superconductor RE(O,F)BiS2 (RE = La, Ce, Pr, Nd)
Creators: name: Abbas, Fysol Ibna
name: Hoshi, Kazuhisa
name: Yamashita, Aichi
name: Nakahira, Yuki
name: Goto, Yosuke
name: Miura, Akira
name: Moriyoshi, Chikako
name: Kuroiwa, Yoshihiro
name: Terashima, Kensei
name: Matsumoto, Ryo
name: Takano, Yoshihiko
name: Mizuguchi, Yoshikazu
Publisher: name: arXiv
Year: 2022
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: We studied Grüneisen parameter (γG) to investigate lattice anharmonicity in a layered BiS2-based superconductor system REO1-xFxBiS2 (RE = La, Ce, Pr, Nd), where in-plane chemical pressure was tuned by substituting the RE elements. With increasing in-plane chemical pressure, bulk modulus remarkably increases, and a high γG is observed for RE = Nd. The dependence of γG on in-plane chemical pressure exhibits a good correlation with Tc, and a higher Tc is achieved when γG is large for RE = Nd. In addition, γG shows a slight decrease by a decrease of F concentration (x) in REO1-xFxBiS2. Our results show that the anharmonic vibration of Bi along the c-axis is present in REO1-xFxBiS2, and the enhancement of the anharmonicity is positively linked to superconducting Tc and pairing mechanisms.
description: 15 pages, 5 figures
title: Fluoroscopy-guided dilatation of oesophageal strictures in patients with dystrophic epidermolysis bullosa: long-term results review, single centre experience
Creators: name: Kudrnova, Slavka
Publisher: name: European Congress of Radiology
Year: 2018
Subjects: subject: Interventional non-vascular
subject: Mediastinum
subject: Fluoroscopy
subject: Dilation
subject: Contrast agent-oral
subject: Swallowing disorders
subject: Genetic defects
subject: Stomach (incl. Oesophagus)

description: Aims and objectives Methods and materials Results Conclusion Personal information References
description: Aims and objectives: Epidermolysis Bullosa (EB) Very rare (1-3 of every 100.000 live births ) heterogenous group of genetically transmitted diseases with skin blistering and scarring even after minor mechanical trauma Almost 5,000 EB patients in the United Kingdom Four...
Frequencies and resonances around $L_4$ in the elliptic restricted three-body problem
Creators: name: Rajnai, R.
name: Nagy, I.
name: Érdi, B.
Publisher: name: arXiv
Year: 2014
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: FOS: Physical sciences

description: The stability of the Lagrangian point $L_4$ is investigated in the elliptic restricted three-body problem by using Floquet's theory. Stable and unstable domains are determined in the parameter plane of the mass parameter and the eccentricity by computing the characteristic exponents. Frequencies of motion around $L_4$ have been determined both in the stable and unstable domains and fitting functions for the frequencies are derived depending on the mass parameter and the eccentricity. Resonances between the frequencies are studied in the whole parameter plane. It is shown that the 1:1 resonances are not restricted only to single curves but extend to the whole unstable domain. In the unstable domains longer escape times of the test particle from the neighbourhood of $L_4$ are related to certain resonances, but changing the parameters the same resonances may lead to faster escape.
title: Επίδραση της μικροκυματικής ακτινοβολίας στη λειοτρίβηση βωξίτη
title: The effect of microwave radiation on bauxite grinding
Creators: name: Καλαριδης Χρηστος
Publisher: name: Technical University of Crete
Year: 2023

description: Πολλοί ερευνητές έχουν  ασχοληθεί τα τελευταία χρόνια με την μελέτη της διαδικασίας της λειοτρίβησης. Είναι γνωστό ότι η λειοτρίβηση με σφαιρόμυλο είναι μια πολύ ενεργοβόρα διεργασία και γι’ αυτό τα τελευταία χρόνια γίνονται προσπάθειες μείωσης των ενεργειακών της απαιτήσεων, γιατί μια μικρή μείωση της ενέργειας που καταναλώνεται οδηγεί σε μείωση του κόστους ανά μονάδα βάρους του υλικού. Η παρούσα διπλωματική εστιάστηκε στη μελέτη της χρήσης της μικροκυματικής ενέργειας στην λειοτρίβηση του βωξίτη.
Αυτή η διπλωματική εργασία μελετά την επίδραση της μικροκυματικής ακτινοβολίας στη λειοτρίβηση του βωξίτη Φωκίδας. Η θέρμανση με μικροκύματα μπορεί να είναι μια αποτελεσματική εναλλακτική λύση στη συμβατική θέρμανση καθώς συμβάλλει στην αύξηση της ευθραυστότητας του υλικού και στη μείωση της κατανάλωσης της συνολικής ενέργειας.
Για αυτόν τον λόγο πραγματοποιήθηκαν δοκιμές λειοτρίβησης σε συγκεκριμένα κοκκομετρικά κλάσματα βωξίτη με τη χρήση του εργαστηριακού σφαιρόμυλου. Ειδικότερα, το υλικό υποβλήθηκε σε θέρμανση σε φούρνο μικροκυμάτων ισχύος 400 W και 800 W και στην συνέχεια έγινε σύγκριση με τα αποτελέσματα που προέκυψαν όταν το μετάλλευμα δεν είχε υποβληθεί σε μικροκυματική ακτινοβολία (0 W). Σύμφωνα με την διαδικασία τα κλάσματα τροφοδοσίας που επιλέχθηκαν λειοτριβήθηκαν σε συγκεκριμένους χρόνους (0.5, 2, 4, 16 και 32 min) και τα προϊόντα που παρήχθησαν μελετήθηκαν με τη χρήση των κινητικών μοντέλων λειοτρίβησης.Τα αποτελέσματα έδειξαν ότι το υλικό θραύεται ευκολότερα με την επεξεργασία στα μικροκύματα και συγκεκριμένα όσο αυξάνεται η ένταση της μικροκυματικής ακτινοβολίας επιτυγχάνεται και βέλτιστη θραύση.
Humor During Pandemic in Romania on Facebook
Creators: name: Stefani, Cluadiu
Publisher: name: Universita' degli Studi di Salerno
Year: 2020
Subjects: Pandemic
Facebook
Meme
Humor

description: During the pandemic, finding coping mechanisms for anxiety, stress and isolation is critical. In Romania, humor has always been a way to overcome anxiety and insecurity and is present in all dramatic situations. The purpose of this study is to analyze the content of humorous messages, the topics addressed, their characteristics and their dissemination. The method used was the content analysis of the messages broadcast on the social network Facebook during March - April 2020 in Romania. The results obtained show us that the main forms of diffusion of humorous messages is the Power point humor, photos, written messages followed by video material with one or more protagonists in domestic contexts and poetry. The main topics covered are: the threat, the protective measures, quarantine, the efficiency of the health system, the changes in the lifestyle and their implications. The main way to spread is to roll messages on networks from the initiators of conversations. The main purpose of the messages is to neutralize the threat in the collective imaginary and to regain the symbolic control.
title: Legal Requirements and Technical Metrics for Controlling Privacy of Employees’ Location Data
Creators: name: Waldmann, Ulrich
name: Kunz, Thomas
name: Schleper, Janine
name: Kohn, Matthias
name: Pesch, Paulina Jo
Publisher: name: GI
Year: 2023

description: Companies usually store a lot of personal data about their employees. Metrics for automated verification of the compliance with the data minimization and storage limitation requirements provided in the General Data Protection Regulation (GDPR) can help companies meet their monitoring obligations. Furthermore, employees can monitor the processing of their personal data and verify that the processing of their personal data is lawful. In particular, metrics can be used to monitor complex data privacy requirements such as the data minimization or storage limitation. For this purpose, suitable data sources are combined in a meaningful way to obtain indicators of data protection. This paper outlines basic metrics for an application scenario from the field of agile workforce management in logistics. The metrics are intended to verify compliance when processing real-time location data for rescheduling employees. To this end, the local logistics and workforce management system is supplemented by a proxy server and a metrics service – two trusted components within the logistics enterprise network. In particular, the metrics system prevents the internal company network from directly accessing employee location data. Depending on the role in the company (e. g., data subject, management, works council, data protection officer), it can provide different sets of metrics on current data protection.
title: Renal tumors treated with ablative techniques: most frequent complications and how to avoid them
Creators: name: Lamprecht, Yasmina
Publisher: name: European Congress of Radiology
Year: 2018
Subjects: subject: Neoplasia
subject: Cancer
subject: Ablation procedures
subject: Ultrasound
subject: CT
subject: Kidney
subject: Interventional non-vascular

description: Learning objectives Background Findings and procedure details Conclusion Personal information References
description: Learning objectives: To make a straightforward algorithm that allows us, depending on the different renal tumor characteristics, to suspect what type of postablation complications are more prone to occur and how to avoid...
Confirmation for Wielandt's conjecture
Creators: name: Guo, Wenbin
name: Revin, Danila
name: Vdovin, Evgeny
Publisher: name: arXiv
Year: 2014
Subjects: subject: Group Theory (math.GR)
subject: FOS: Mathematics
subject: 20D20

description: Let $π$ be a set of primes. By H.Wielandt definition, {\it Sylow $π$-theorem} holds for a finite group $G$ if all maximal $π$-subgroups of $G$ are conjugate. In the paper, the following statement is proven. Assume that $π$ is a union of disjoint subsets $σ$ and $τ$ and a finite group $G$ possesses a $π$-Hall subgroup which is a direct product of a $σ$-subgroup and a $τ$-subgroup. Furthermore, assume that both the Sylow $σ$-theorem and $τ$-theorem hold for $G$. Then the Sylow $π$-theorem holds for $G$. This result confirms a conjecture posed by H.\,Wielandt in~1959.
title: 16. Workshop Be-greifbare Interaktion
Creators: name: Schmid, Andreas
name: van Koningsbruggen, Rosa
name: Delgado Rodriguez, Sarah
name: Maierhöfer, Vitus
name: Waldschütz, Hannes
name: Kalus, Alexander
Publisher: name: GI
Year: 2023
Subjects: subject: Be-greifbare Interaktion
subject: Workshop
subject: Human Computer Interaction
subject: Tangible Interaction

description: Tangible interaction is centered around the manipulation of physical objects and the usage of the own body. It thus involves the environment and the physical context much stronger than purely visual or speech-based interfaces. The wide range of possibilities for integrating sensors and computing systems into the physical environment provides ample design space. The research field of Tangible Interaction investigates this scope scientifically and practically in order to enable meaningful and human-oriented applications. In this workshop, the German Informatics Society (GI) specialist group "Be-greifbare Interaktion" of the Department of Human-Computer Interaction offers a forum for the presentation of scientific discourse and interdisciplinary discussion. Contributions range from theoretical, critical and forward-looking reflections to design work and reports on practical implementations. The workshop opens the discussion to a broader audience of experts in order to disclose current developments and generate new impulses for the research field.
Coronal Fourier power spectra: implications for coronal seismology and coronal heating
Creators: name: Ireland, Jack
name: McAteer, R. T. James
name: Inglis, Andrew R.
Publisher: name: arXiv
Year: 2014
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: The dynamics of regions of the solar corona are investigated using Atmospheric Imaging Assembly (AIA) 171Å and 193Å data. The coronal emission from the quiet Sun, coronal loop footprints, coronal moss, and from above a sunspot is studied. It is shown that the mean Fourier power spectra in these regions can be described by a power law at lower frequencies that tails to flat spectrum at higher frequencies, plus a Gaussian-shaped contribution that varies depending on the region studied. This Fourier spectral shape is in contrast to the commonly-held assumption that coronal time-series are well described by the sum of a long time-scale background trend plus Gaussian-distributed noise, with some specific locations also showing an oscillatory signal. The implications of this discovery to the field of coronal seismology and the automated detections of oscillations are discussed. The power law contribution to the shape of the Fourier power spectrum is interpreted as being due to the summation of a distribution of exponentially decaying emission events along the line of sight. This is consistent with the idea that the solar atmosphere is heated everywhere by small energy deposition events.
Collective flow in ultrarelativistic $^3$He-Au collisions
Creators: name: Bozek, Piotr
name: Broniowski, Wojciech
Publisher: name: arXiv
Year: 2014
Subjects: subject: Nuclear Theory (nucl-th)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: Nuclear Experiment (nucl-ex)
subject: FOS: Physical sciences

description: The triangular flow in ultrarelativistic $^3$He-Au collisions at RHIC energies is enhanced due to the triangular arrangement of the nucleon configurations in $^3$He. We study the fireball eccentricities in the Glauber Monte Carlo model and find that since the configurations of the projectile $^3$He are elongated triangles, the created fireball has a large ellipticity and a smaller triangularity. The dependence of the triangularity on centrality is weak, so it cannot be extracted from the centrality dependence of the triangular flow $v_3$, as it is dominated by the centrality dependence of the hydrodynamic response. We propose to look at the centrality dependence of the ratio $v_n\{4\}/v_n\{2\}$, where the uncertainties from the hydrodynamic response cancel, and show that the basic signature of the geometry-driven collective flow is the raise of the ratio $v_3\{4\}/v_3\{2\}$ with the number of participant nucleons for centralities less than 10%.
Non-linear current and dynamical quantum phase transitions in the flux-quenched Su-Schrieffer-Heeger model
Creators: name: Rossi, Lorenzo
name: Dolcini, Fabrizio
Publisher: name: arXiv
Year: 2022
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Quantum Gases (cond-mat.quant-gas)
subject: FOS: Physical sciences

description: We investigate the dynamical effects of a magnetic flux quench in the Su-Schrieffer-Heeger model in a one-dimensional ring geometry. We show that, even when the system is initially in the half-filled insulating state, the flux quench induces a time-dependent current that eventually reaches a finite stationary value. Such persistent current, which exists also in the thermodynamic limit, cannot be captured by the linear response theory and is the hallmark of nonlinear dynamical effects occurring in the presence of dimerization. Moreover, we show that, for a range of values of dimerization strength and initial flux, the system exhibits dynamical quantum phase transitions, despite the quench is performed within the same topological class of the model.
description: 8 pages, 4 figures
title: Chest imaging in the many benign histiocytic disorders
Creators: name: Vilas Boas, Isabel
Publisher: name: European Congress of Radiology
Year: 2018
Subjects: subject: Lung
subject: Thorax
subject: Mediastinum
subject: CT
subject: CT-High Resolution
subject: Imaging sequences
subject: Pathology

description: Learning objectives Background Findings and procedure details Conclusion Personal information References
description: Learning objectives: To broaden the differentials of benign histiocytic disorders by reviewing their main primary and secondary causes in diagnostic imaging, focusing the chest...
title: Entscheidungsunterstützungssysteme in der Produktentwicklung von Unternehmen
Creators: name: Mueller, Matthias
name: Franczyk, Bogdan
name: Weiland, Jens
Publisher: name: GI
Year: 2023

description: With increasing dynamics in the research environment – of product development – the technical requirements for future decision-making processes are also increasing in addition to complexity. The introduction of new IT systems for the automation of decisions results in adjustments to the current business processes of the companies. For a successful implementation of new IT information tools, it is necessary to examine in advance possible effects on the existing user systems in more detail. In science, new technologies, AI information systems and new knowledge are often created by interpreting and synthesizing existing knowledge. For this reason, the quality of literature analyses is becoming increasingly relevant in engineering and computer science. In addition to the number of publications, the effort for structured literature research (SLA) is also growing. In this paper, the authors present the research process and the results of a structured literature analysis. The purpose of this paper is to identify the current state of research on decision support in the product development of small and medium-sized enterprises (SME) as well as large companies in the automotive industry and, after analysis and evaluation, to identify possible research gaps on automated decision support systems (aDSS). The paper ends with an outlook on future research work on aDSS.
title: Does Activation of Manduca sexta Duox cause gut inflammation? New insights with MRI and PET imaging.
Creators: name: Müller, Anton
Publisher: name: European Congress of Radiology
Year: 2018
Subjects: subject: Inflammation
subject: Infection
subject: Radiobiology
subject: Molecular imaging
subject: Experimental investigations
subject: PET-MR
subject: PET
subject: MR
subject: Molecular imaging
subject: Gastrointestinal tract
subject: Animal (veterinary) studies

description: Aims and objectives Methods and materials Results Conclusion Personal information References
description: Aims and objectives: Animal epithelia are heavily colonized by bacteria. One important protein activated by an unbalanced microbiome via bacterial uracil is DUOX. DUOX attacks pathogenic bacteria. Because DUOX is a evolutionary conserved protein, research on DUOX has...
The extended ROSAT-ESO Flux-Limited X-ray Galaxy Cluster Survey (REFLEX II) V. Exploring a local underdensity in the Southern Sky
Creators: name: Boehringer, Hans
name: Chon, Gayoung
name: Bristow, Martyn
name: Collins, Chris A.
Publisher: name: arXiv
Year: 2014
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: Several claims have been made that we are located in a locally underdense region of the Universe based on observations of supernovae and galaxy density distributions. Two recent studies of K-band galaxy surveys have provided new support for a local underdensity in the galaxy distribution out to distances of 200 - 300 Mpc. If confirmed, such large local underdensities would have important implications on the interpretation of local measurements of cosmological parameters. Galaxy clusters have been shown to be ideal probes to trace the large-scale structure of the Universe. In this paper we study the local density distribution in the southern sky with the X-ray detected galaxy clusters from the REFLEX II cluster survey. From the normalized comoving number density of clusters we find an average underdensity of ~30 - 40% in the redshift range out to z ~0.04 (~170 Mpc) in the southern extragalactic sky with a significance larger than 3.4sigma. On larger scales from 300 Mpc to over 1 Gpc the density distribution appears remarkably homogeneous. The local underdensity seems to be dominated by the South Galactic Cap region. A comparison of the cluster distribution with that of galaxies in the K-band from a recent study shows that galaxies and clusters trace each other very closely in density. In the South Galactic Cap region both surveys find a local underdensity in the redshift range z= 0 to 0.05 and no significant underdensity in the North Galactic Cap at southern latitudes. Our results to not support cosmological models that attempt to interpret the cosmic acceleration by a large local void, since the local underdensity we find is not isotropic and limited to a size significantly smaller than 300 Mpc radius.
description: submitted to Astronomy and Astrophysics, 8 pages, 9 figures
Citizen Humanities as a Fusion of Digital and Public Humanities?
Creators: name: Heinisch, Barbara
Publisher: name: B. Heinisch, Citizen Humanities as a Fusion of Digital and Public Humanities?, «Magazén», 1, 2020, n.2, pp. 143-180
Year: 2020
Subjects: Responsible research and innovation
Third mission
Crowdsourcing
Public participation in research
Participatory research
Citizen science
Public engagement

description: Digital and public humanities have gained a foothold in academia, but very little is known about citizen humanities, which is referring to the engagement of the general public in scholarly research. Although the term is new, public participation in the humanities, either as the citizens’ contribution of intellectual effort or knowledge to academic research, or as the contribution of resources and tools, looks back on a long tradition. The citizen humanities range from the creation of dictionaries, the transcription and annotation of historical records to the decoding of ancient Egyptian papyri. While the digital humanities provide the citizen humanities with data, tools and techniques, the public humanities offer the means of engaging diverse publics in research activities. After embedding the citizen humanities theoretically in the responsible research and innovation paradigm, this paper will illustrate how digitisation and public involvement laid the foundations for today’s citizen humanities. With a focus on the fusion of digital and public humanities in citizen humanities, this paper will demonstrate the mutual influence on practices (of research). This influence is not only reflected in the approaches to research, analysis, communication, and dissemination but also in the citizen humanities’ novel ways of knowledge co-production.
title: A Wizard-of-Oz Setup to Assess Pedestrian Behavior and Teach Delivery Robots on Sidewalk Encounters
Creators: name: Pfleging, Bastian
name: Seyffer, Norman
name: Beek, Zina
name: Zug, Sebastian
Publisher: name: GI
Year: 2023

description: With the spreading of small mobile robots like last-mile delivery robots a new type of vehicles is expected to share sidewalks, foot and cycle paths with vulnerable users like pedestrians and cyclists. In order to ensure a safe co-existence of all instances that share these paths, a central point is to assess to what extent and how such robots should interact with these users. To understand this novel space for human-robot interaction, we are currently investigating where interaction is expected to happen and how people react to the appearance of such robots. In this paper, we present our approach of using a Wizard-of-Oz robot setup with which we aim to assess pedestrian behavior and at the same time collect sensor data to train future robots. We discuss prior work on mobile robots and external interfaces (eHMIs) for other road users, present our current setup, and outline future research activities.
Search for the chiral magnetic effect in collisions between two isobars with deformed and neutron-rich nuclear structures
Creators: name: Zhao, Xin-Li
name: Ma, Guo-Liang
Publisher: name: arXiv
Year: 2022
Subjects: subject: Nuclear Theory (nucl-th)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: Nuclear Experiment (nucl-ex)
subject: FOS: Physical sciences

description: Isobar collisions which were thought to have the same background and different magnetic fields provide an opportunity to verify the chiral magnetic effect (CME) in relativistic heavy-ion collisions. However, the first result from the RHIC-STAR isobar experiment did not observe the CME signal, but discovered that the backgrounds are different between $_{44}^{96}\textrm{Ru}+_{44}^{96}\textrm{Ru}$ and $_{40}^{96}\textrm{Zr}+_{40}^{96}\textrm{Zr}$ collisions. We test eighteen cases of Woods-Saxon parameter settings resulting from different nuclear deformation or nuclear structure effects using a mutiphase transport model. We find out that seven cases can reasonably reproduce three reference ratios measured by the STAR experiment. Considering both the halo-type neutron skin structure and CME-like charge separation, we demonstrate that it is difficult for the CME observables ($Δδ$, $Δδ$ ratio, $Δγ$ and $Δγ$ ratio) to distinguish the presence or absence of the CME, if the CME strength is weak in isobar collisions. It is because the final state interactions significantly weaken the initial CME signal, resulting in non-linear sensitivities of the CME observables to the CME strength. Therefore, more sensitive observables are required to search for the possible small CME signal in isobar collisions.
description: 11 pages, 7 figures, final published version
title: Λειτουργική ανάλυση του γονιδίου FRA10AC1 του ανθρώπου στο πλαίσιο του δικτύου πρωτεϊνικών αλληλεπιδράσεων του σωματίου συναρμογής
titleType: AlternativeTitle
Creators: name: Γαλλιοπούλου, Ελένη
Publisher: name: University of Thessaly
Year: 2018
Subjects: subject: Γονίδια -- Ανάλυση
subject: Γονιδιακή χαρτογράφηση
subject: Πρωτεϊνικές αλληλεπιδράσεις -- Μελέτη

description: Σημείωση: διατίθεται συμπληρωματικό υλικό σε ξεχωριστό αρχείο.
Electric-field-coupled oscillators for collective electrochemical perception in underwater robotics
Creators: name: Kernbach, Serge
Publisher: name: arXiv
Year: 2022
Subjects: subject: Robotics (cs.RO)
subject: Instrumentation and Detectors (physics.ins-det)
subject: FOS: Computer and information sciences
subject: FOS: Physical sciences

description: This work explores the application of nonlinear oscillators coupled by electric field in water for collective tasks in underwater robotics. Such coupled oscillators operate in clear and colloidal (mud, bottom silt) water and represent a collective electrochemical sensor that is sensitive to global environmental parameters, geometry of common electric field and spatial dynamics of autonomous underwater vehicles (AUVs). Implemented in hardware and software, this approach can be used to create global awareness in the group of robots, which possess limited sensing and communication capabilities. Using oscillators from different AUVs enables extending the range limitations related to electric dipole of a single AUV. Applications of this technique are demonstrated for detecting the number of AUVs, distances between them, perception of dielectric objects, synchronization of behavior and discrimination between 'collective self' and 'collective non-self' through an 'electrical mirror'. These approaches have been implemented in several research projects with AUVs in fresh and salt water.
title: Small airway disease: semiological and radiological evaluation. A pictorial review.
Creators: name: Nieto, Karen
Publisher: name: European Congress of Radiology
Year: 2018
Subjects: subject: Decision analysis
subject: CT
subject: Thorax
subject: Education and training

description: Learning objectives Background Findings and procedure details Conclusion Personal information References
description: Learning objectives: To review direct and indirect radiological findings in small airway disease and its anatomical, semiological and pathological correlation. To remember the bronchiolar classification of bronchiolitis that includes the wide range of pathologies that...
title: Η επίδραση της ηλικίας στις φυσιολογικές προσαρμογές και στο οξειδωτικό στρες του ανθρώπου κατά την άσκηση
titleType: AlternativeTitle
Creators: name: Ντουρουντού, Ιωάννης
Publisher: name: University of Thessaly
Year: 2009
Subjects: subject: ΟΞΕΙΔΩΤΙΚΟ ΣΤΡΕΣ
subject: ΑΣΚΗΣΗ -- ΦΥΣΙΟΛΟΓΙΑ

description: Η γήρανση του ανθρώπινου οργανισμού σχετίζεται με μια επικείμενη μείωση της λειτουργικής ικανότητας, ελαττώνοντας τις φυσιολογικές, τις βιοχημικές προσαρμογές και αποκρίσεις του. Το δείγμα της μελέτης αποτέλεσαν 68 υγιείς εθελοντές άρρενες (μη αθλητές), ηλικίας 20-85 ετών. Οι δοκιμαζόμενοι κατατάχτηκαν σε 1 από τις 6 πειραματικές ομάδες της μελέτης, ανάλογα με το επίπεδο φυσικής κατάστασης και το παράγοντα ηλικία. Στη συνέχεια εφαρμόστηκαν δοκιμασίες αξιολόγησης φυσικής κατάστασης και φυσιολογικής λειτουργικότητας. Αυτές ήταν σωματομετρικές μετρήσεις, η αξιολόγηση της μέγιστης δύναμης κάτω άκρων, η μέγιστη καρδιοαναπνευστική ικανότητα (VO2 max), βιοχημικοί δείκτες ηρεμίας, ενώ εφαρμόστηκε και ιστοχημική ανάλυση μυϊκού ιστού. Κατά την πειραματική δοκιμασία εφαρμόστηκε, ήπιας έντασης άσκηση (70-75 % της VO2 max) για 45 λεπτά, ενώ στη συνέχεια η ένταση αυξήθηκε στο 95 % της V02max, μέχρι εξάντλησης. Πριν και μετά από αυτή τη δοκιμασία συλλέχτηκαν δείγματα αίματος από τη μεσοβασιλική φλέβα και μυϊκού ιστού από τον έξω πλατύ μυ του μηρού. Το επίπεδο σημαντικότητας ορίστηκε στο ρ
On the use of asymmetric PSF on NIR images of crowded stellar fields
Creators: name: Fiorentino, Giuliana
name: Ferraro, Ivan
name: Iannicola, Giacinto
name: Bono, Giuseppe
name: Monelli, Matteo
name: Testa, Vincenzo
name: Arcidiacono, Carmelo
name: Faccini, Marco
name: Gilmozzi, Roberto
name: Xompero, Marco
name: Briguglio, Runa
Publisher: name: arXiv
Year: 2014
Subjects: subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: FOS: Physical sciences

description: We present data collected using the camera PISCES coupled with the Firt Light Adaptive Optics (FLAO) mounted at the Large Binocular Telescope (LBT). The images were collected using two natural guide stars with an apparent magnitude of R<13 mag. During these observations the seeing was on average ~0.9". The AO performed very well: the images display a mean FWHM of 0.05 arcsec and of 0.06 arcsec in the J- and in the Ks-band, respectively. The Strehl ratio on the quoted images reaches 13-30% (J) and 50-65% (Ks), in the off and in the central pointings respectively. On the basis of this sample we have reached a J-band limiting magnitude of ~22.5 mag and the deepest Ks-band limiting magnitude ever obtained in a crowded stellar field: Ks~23 mag. J-band images display a complex change in the shape of the PSF when moving at larger radial distances from the natural guide star. In particular, the stellar images become more elongated in approaching the corners of the J-band images whereas the Ks-band images are more uniform. We discuss in detail the strategy used to perform accurate and deep photometry in these very challenging images. In particular we will focus our attention on the use of an updated version of ROMAFOT based on asymmetric and analytical Point Spread Functions. The quality of the photometry allowed us to properly identify a feature that clearly shows up in NIR bands: the main sequence knee (MSK). The MSK is independent of the evolutionary age, therefore the difference in magnitude with the canonical clock to constrain the cluster age, the main sequence turn off (MSTO), provides an estimate of the absolute age of the cluster. The key advantage of this new approach is that the error decreases by a factor of two when compared with the classical one. Combining ground-based Ks with space F606W photometry, we estimate the absolute age of M15 to be 13.70+-0.80 Gyr.
description: 15 pages, 7 figures, presented at the SPIE conference 2014
Expectation values of flavor-neutrino numbers with respect to neutrino-source hadron states --Neutrino oscillations and decay probabilities--
Creators: name: Fujii, Kanji
name: Toyota, Norihito
Publisher: name: arXiv
Year: 2014
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: On the basis of quantum field theory, we consider a unified description of various processes accompanied by neutrinos, namely weak decays and oscillation processes. The structures of the expectation values of flavor-neutrino numbers with respect to neutrino-source hadron state are investigated. Due to the smallness of neutrino masses, we naturally obtain the old (i.e. pre-mixing) formulas of decay probabilities. Together, it is shown that the oscillation formulas, similar to the usual ones, are applied irrespectively of the details of neutrino-producing processes. The derived oscillation formulas are the same in form as the usually used ones except for the oscillation length.
description: 15 pages, 5 figures
Pressure-induced superconductivity in kagome single crystal Pd3P2S8
Creators: name: Zhou, Ying
name: He, Xinyi
name: Wang, Shuyang
name: Wang, Jing
name: Chen, Xuliang
name: Zhou, Yonghui
name: An, Chao
name: Zhang, Min
name: Zhang, Zhitao
name: Yang, Zhaorong
Publisher: name: arXiv
Year: 2022
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: Kagome lattice offers unique opportunities for the exploration of unusual quantum states of correlated electrons. Here, we report on the observation of superconductivity in a kagome single crystal Pd3P2S8 when a semiconducting to metallic transition is driven by pressure. High-pressure resistance measurements show that the metallization and superconductivity are simultaneously observed at about 11 GPa. With increasing pressure, the superconducting critical temperature Tc is monotonously enhanced from 2.6 K to a maximum 7.7 K at ~52 GPa. Interestingly, superconductivity retains when the pressure is fully released. Synchrotron XRD and Raman experiments consistently evidence that the emergence of superconductivity is accompanied with an amorphization and the retainability of superconductivity upon decompression can be attributed to the irreversibility of the amorphization.
title: The Maamtransa murders: The trial of Myles Joyce
Creators: name: Hanly, Conor
Publisher: name: Bloomsbury Academic
Year: 2022

description: In 1882, five members of the Joyce family were brutally murdered in a rural part of western Ireland. The Crown prosecuted a group of men for the murders; utilising all its trial powers and privileges, the Crown secured convictions against three men who were sentenced to death, and another five men changed their pleas to guilty and ultimately were sentenced to imprisonment for twenty years. A controversy developed shortly afterwards and continues to this day concerning one of the executed men, Myles Joyce, who was and is widely regarded as being innocent of the charges. This chapter considers the principal procedural issues that arose during the Maamtrasna trials and shows that the Crown’s actions were entirely within the contemporary trial procedures. This does not mean that the trial and execution of Myles Joyce was necessarily fair, however; the aggregation of the Crown’s tactics, combined with a poor defence and a slanted judicial summary, together with information that came to the attention of the executive authority prior to Myles Joyce’s execution, suggest that an innocent man was indeed executed. Thus, a lawful trial and execution will not necessarily be a fair trial and execution.
title: Transitional Cross Reality Interfaces for Spatially Demanding Search and Collect Tasks
Creators: name: Schmidt, Leonard
name: Yigitbas, Enes
Publisher: name: GI
Year: 2023

description: Cross-Reality interfaces offer the possibility to perform a task in various different environments. In order to fulfill the task efficiently, the interface requires a convenient mechanism to transition between these environments. Additionally, the transitions need to be seamless to not disrupt the focus or progress of the task. However,seamlessly switching between environments with different extents of virtual and real elements is not trivial. The solution to this problem is to use various environments with only subtle differences and a smooth mechanism to hide and unhide virtual and real elements. That way, users can perceive the transitions as they slowly progress over time and are able to understand the differences between the environments. We developed an interface that allows users to seamlessly transition between a total of six environments. We evaluated this prototype by analyzing the users’ behavior of transitioning and the effect a switch between environments has on the perceived presence by measuring the user’s speed while moving around and collecting objects in the environments. We observed major differences in speed across the environments and various transitional behaviors.
Numerical comparison between a Gyrofluid and Gyrokinetic model investigating collisionless magnetic reconnection
Creators: name: Zacharias, O.
name: Comisso, L.
name: Grasso, D.
name: Kleiber, R.
name: Borchardt, M.
name: Hatzky, R.
Publisher: name: arXiv
Year: 2014
Subjects: subject: Plasma Physics (physics.plasm-ph)
subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: Computational Physics (physics.comp-ph)
subject: FOS: Physical sciences

description: The first detailed comparison between gyrokinetic and gyrofluid simulations of collisionless magnetic reconnection has been carried out. Both the linear and nonlinear evolution of the collisionless tearing mode have been analyzed. In the linear regime, we have found a good agreement between the two approaches over the whole spectrum of linearly unstable wave numbers, both in the drift kinetic limit and for finite ion temperature. Nonlinearly, focusing on the small-$Δ'$ regime, with $Δ'$ indicating the standard tearing stability parameter, we have compared relevant observables such as the evolution and saturation of the island width, as well as the island oscillation frequency in the saturated phase.The results are basically the same, with small discrepancies only in the value of the saturated island width for moderately high values of $Δ'$. Therefore, in the regimes investigated here, the gyrofluid approach can describe the collisionless reconnection process as well as the more complete gyrokinetic model.
description: Accepted for publication on Physics of Plasmas
title: Fat-containing tumors in abdomen and pelvis: the radiologic-pathology correlation
Creators: name: Primitivo, Ana
Publisher: name: European Congress of Radiology
Year: 2018
Subjects: subject: Education and training
subject: Education
subject: Ultrasound
subject: MR
subject: CT
subject: Pelvis
subject: Abdomen

description: Learning objectives Background Findings and procedure details Conclusion Personal information References
description: Learning objectives: 1. Discuss different imaging modalities used to characterize fat-containing lesions (ultrasound, CT and MRI) 2. To review intra-abdominal fatty neoplastic lesions in US, CT and MRI 3. To provide a radiologic-pathologic correlation for some of these...