cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Using EEG Signals to Assess Workload during Memory Retrieval in a Real-world Scenario
Creators: name: Chiang, Kuan-Jung
name: Dong, Steven
name: Cheng, Chung-Kuan
name: Jung, Tzyy-Ping
Publisher: name: arXiv
Year: 2023
Subjects: subject: Human-Computer Interaction (cs.HC)
subject: Machine Learning (cs.LG)
subject: FOS: Computer and information sciences

description: Objective: The Electroencephalogram (EEG) is gaining popularity as a physiological measure for neuroergonomics in human factor studies because it is objective, less prone to bias, and capable of assessing the dynamics of cognitive states. This study investigated the associations between memory workload and EEG during participants' typical office tasks on a single-monitor and dual-monitor arrangement. We expect a higher memory workload for the single-monitor arrangement. Approach: We designed an experiment that mimics the scenario of a subject performing some office work and examined whether the subjects experienced various levels of memory workload in two different office setups: 1) a single-monitor setup and 2) a dual-monitor setup. We used EEG band power, mutual information, and coherence as features to train machine learning models to classify high versus low memory workload states. Main results: The study results showed that these characteristics exhibited significant differences that were consistent across all participants. We also verified the robustness and consistency of these EEG signatures in a different data set collected during a Sternberg task in a prior study. Significance: The study found the EEG correlates of memory workload across individuals, demonstrating the effectiveness of using EEG analysis in conducting real-world neuroergonomic studies.
description: This paper is published in Journal of Neural Engineering (2023). 19 pages, 9 figures
Croatian Film Review Dataset (Cro-FiReDa): A Sentiment Annotated Dataset of Film Reviews
Creators: name: Thakkar, Gaurish
name: Preradovic, Nives Mikelic
name: Tadić, Marko
Publisher: name: arXiv
Year: 2023
Subjects: subject: Computation and Language (cs.CL)
subject: FOS: Computer and information sciences

description: This paper introduces Cro-FiReDa, a sentiment-annotated dataset for Croatian in the domain of movie reviews. The dataset, which contains over 10,000 sentences, has been annotated at the sentence level. In addition to presenting the overall annotation process, we also present benchmark results based on the transformer-based fine-tuning approach
title: Zivilgesellschaftliches Engagement im Bereich Flucht und Asyl
title: Eine qualitative Studie über Merkmale, Spannungsverhältnisse und Erwartungen sowie mögliche Perspektiven für (gemeinwesenorientierte) Soziale Arbeit
titleType: AlternativeTitle
Creators: name: Bächer, Pascal
Publisher: name: Universität Vechta
Year: 2023
Subjects: subject: Flucht
subject: Zivilgesellschaftliches Engagement
subject: Ehrenamt
subject: Bürgerschaftliches Engagement
subject: Migration
subject: Asyl
subject: Gemeinwesenarbeit
subject: Gemeinwesenorientierte Soziale Arbeit
subject: DDC Sachgruppen::300 - Sozialwissenschaften::360 - Soziale Probleme, Sozialdienste, Versicherungen

description: Diese Dissertation beschäftigt sich mit dem freiwilligen Engagement im Bereich Flucht und Asyl und fokussiert dessen Zusammensetzung, Herausforderungen und Merkmale, die Motive der Freiwilligen, und die Netzwerke, in denen sie sich bewegen. Darüber hinaus beschäftigt sich die Arbeit mit den Erwartungen der Freiwilligen an ihre Adressat*innen, die Dynamiken in den Beziehungen zu diesen und dabei relevant gemachte Deutungs- und Handlungsstrukturen. Als theoretischer Rahmen werden hierzu Konzepte der Reziprozität und Solidarität sowie des Paternalismus vorgestellt und das Engagement gabentheoretisch verortet. Auf Basis dieses Zugangs wird die Kategorie des ‚perfekten Flüchtlings‘ und diverse Merkmale dieses Dispositivs im Sinne Foucaults als Schlüsselthema der ethnografischen Arbeit vorgestellt. Darüber hinaus wird die Kategorie der ‚richtigen Hilfe‘ skizziert. Eingebettet werden diese Ausführungen in einige Einblicke in das gesellschaftliche Stimmungsbild, medialen Debatten und den Diskurs um Geflüchtete und ihre Unterstützer*innen vor dem Hintergrund der Migrationsbewegungen der letzten Jahre. Zudem wird die Lebenssituation geflüchteter Menschen (im ländlichen Raum) beleuchtet, nachdem diese die alltägliche Praxis des Engagements maßgeblich determiniert. Dabei trägt die Arbeit gerade durch die provokante Kategorie des ‚perfekten Flüchtlings‘ und der Skizze der ‚richtigen Hilfe‘ als Reflexionsfolie zum weiteren Diskurs um die Wahrnehmung geflüchteter Menschen und die Rolle freiwillig Tätiger bei der (Re-)Produktion von Hierarchisierungs- und Ungleichheitsprozessen bei. Auf dieser Basis verfolgt sie außerdem das Ziel, die Praxis der (gemeinwesenorientierten) Sozialen Arbeit zu bereichern und strukturelle Voraussetzungen für ihr Gelingen zu beschreiben. Die Erkenntnisse beruhen auf einem ethnografischen Zugang, der sich durch seine Breite unter Berücksichtigung diverser Perspektiven auszeichnet. Neben Feldaufenthalten in Gemeinschaftsunterkünften für geflüchtete Menschen und Interviews mit Geflüchteten, Freiwilligen und Professionellen (Sozialer Arbeit) spielt dabei auch die Reflexion eigener Engagementerfahrungen des Autors in diesem Feld eine wichtige Rolle.
Κύκλοι ανάπτυξης και κατασκευστικές ετιαρείες. Μελέτη αξιοποίησης προοπτικών από τις επιχειρήσεις του κλάδου
Creators: name: Σταματοπούλου, Αικατερίνη
Publisher: name: Πανεπιστήμιο Πειραιώς
Year: 2023
Subjects: subject: Κύκλοι ανάπτυξης
subject: Κατασκευαστικός κλάδος

description: Πρόσφατη μελέτη του ΙΟΒΕ εξέτασε τους παράγοντες που επηρέασαν τις επιδόσεις του κλάδου Υποδομών και Κατασκευών κατά τη διάρκεια της οικονομικής κρίσης και εντόπισε πεδία για θεσμικές και άλλες παρεμβάσεις, με στόχο τη βελτίωση των προοπτικών του και την ενίσχυση της συμβολής του στην ελληνική οικονομία. Η μελέτη ανέδειξε επίσης τον κρίσιμο ρόλο του Κλάδου Υποδομών και Κατασκευών για την οικονομική ανάπτυξη στην Ελλάδα. Στο πλαίσιο αυτό, τονίστηκε πόσο κρίσιμη είναι η δημιουργία ενός περιβάλλοντος που θα επιτρέπει τον υγιή ανταγωνισμό στην αγορά των δημοσίων έργων, η ιεράρχηση των έργων με βάση ένα μακροπρόθεσμο στρατηγικό σχέδιο για τις υποδομές και η επιτάχυνση της υλοποίησής τους. Παρά κάποια μέτρια πρόοδο, πολλές από τις μεταρρυθμίσεις που απαιτούνται για την αύξηση της συμβολής του τομέα των υποδομών και των κατασκευών στην ελληνική οικονομία εξακολουθούν να λείπουν για διάφορους λόγους. Τα τελευταία χρόνια παρατηρήθηκε ένα ιδιαίτερα δυσμενές εγχώριο οικονομικό περιβάλλον, το οποίο αναμφίβολα αποτέλεσε σημαντικό εμπόδιο για τη λειτουργία του κλάδου των υποδομών και των κατασκευών. Η εμπιστοσύνη των καταναλωτών, των επιχειρήσεων και των επενδυτών έχει σταδιακά επανέλθει, δημιουργώντας ένα θετικό περιβάλλον για τις προοπτικές της ελληνικής οικονομίας, μετά από μια παρατεταμένη περίοδο ύφεσης και στασιμότητας κατά τη διάρκεια των προγραμμάτων οικονομικής προσαρμογής. Ωστόσο, η άφιξη της πανδημίας COVID-19 στις αρχές του 2020 διατάραξε για άλλη μια φορά την ατμόσφαιρα εμπιστοσύνης και οι προσπάθειες να ανακοπεί η εξάπλωσή της οδήγησαν σε συνθήκες που προκάλεσαν την απότομη διακοπή πολλών οικονομικών δραστηριοτήτων στην Ελλάδα και σε όλο τον κόσμο. Οι επιπτώσεις της πανδημίας στους παγκόσμιους ρυθμούς οικονομικής ανάπτυξης είναι ήδη σημαντικές, ιδίως σε έθνη όπως η Ελλάδα, όπου ο τουρισμός αντιπροσωπεύει ένα σημαντικό μέρος του ΑΕΠ. Οι βιομηχανίες υποδομών και κατασκευών βρίσκονται αντιμέτωπες με νέες συνθήκες, στις οποίες πρέπει να προσαρμοστούν, αλλάζοντας τον ρυθμό της τακτικής δραστηριότητά τους. Παράλληλα μειώνονται οι προσδοκίες ανάπτυξης, επειδή οι επενδύσεις σε υποδομές και κατασκευές επηρεάζονται επίσης από την κατάσταση της οικονομίας και τις προοπτικές της. Στόχος του παρόντος είναι να συνδέσει τους αναπτυξιακούς κύκλους και τον κατασκευαστικό κλάδο. Σύμφωνα με τα τελευταία οικονομικά στοιχεία η Ελλάδα ξεκινά έναν κύκλο ανόδου σύμφωνα με την θεωρία των κύκλων οικονομικής ανάπτυξης του Κοντράτιεφ.
CERTainty: Detecting DNS Manipulation at Scale using TLS Certificates
Creators: name: Tsai, Elisa
name: Kumar, Deepak
name: Raman, Ram Sundara
name: Li, Gavin
name: Eiger, Yael
name: Ensafi, Roya
Publisher: name: arXiv
Year: 2023
Subjects: subject: Cryptography and Security (cs.CR)
subject: FOS: Computer and information sciences

description: DNS manipulation is an increasingly common technique used by censors and other network adversaries to prevent users from accessing restricted Internet resources and hijack their connections. Prior work in detecting DNS manipulation relies largely on comparing DNS resolutions with trusted control results to identify inconsistencies. However, the emergence of CDNs and other cloud providers practicing content localization and load balancing leads to these heuristics being inaccurate, paving the need for more verifiable signals of DNS manipulation. In this paper, we develop a new technique, CERTainty, that utilizes the widely established TLS certificate ecosystem to accurately detect DNS manipulation, and obtain more information about the adversaries performing such manipulation. We find that untrusted certificates, mismatching hostnames, and blockpages are powerful proxies for detecting DNS manipulation. Our results show that previous work using consistency-based heuristics is inaccurate, allowing for 72.45% false positives in the cases detected as DNS manipulation. Further, we identify 17 commercial DNS filtering products in 52 countries, including products such as SafeDNS, SkyDNS, and Fortinet, and identify the presence of 55 ASes in 26 countries that perform ISP-level DNS manipulation. We also identify 226 new blockpage clusters that are not covered by previous research. We are integrating techniques used by CERTainty into active measurement platforms to continuously and accurately monitor DNS manipulation.
description: To Appear in: Privacy Enhancing Technologies Symposium (PETS), July 2023
Anomalous diffusion and generalized Sparre-Andersen scaling
Creators: name: Dybiec, Bartlomiej
name: Gudowska-Nowak, Ewa
Publisher: name: arXiv
Year: 2009
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: We are discussing long-time, scaling limit for the anomalous diffusion composed of the subordinated Lévy-Wiener process. The limiting anomalous diffusion is in general non-Markov, even in the regime, where ensemble averages of a mean-square displacement or quantiles representing the group spread of the distribution follow the scaling characteristic for an ordinary stochastic diffusion. To discriminate between truly memory-less process and the non-Markov one, we are analyzing deviation of the survival probability from the (standard) Sparre-Andersen scaling.
description: 5 pages, 3 figures
Evaluating the association between anti-TNFα treatment and multiple sclerosis risk in autoimmune conditions : insights from health administrative data and methodological challenges
Creators: name: Li, Lingyi
Publisher: name: University of British Columbia
Year: 2024

description: Objectives: This dissertation aims to compare the risk of multiple sclerosis (MS) in anti-tumor necrosis factor alpha (TNFα) users with nonusers among patients with rheumatic disease (RD) or inflammatory bowel disease (IBD). It also aims to uncover methodological biases in existing research and explore statistical strategies to address these biases, with a particular focus on the issue of sparse data bias. Methods: Utilizing population-based health administrative data from four Canadian provinces, a nested case-control study was conducted among patients with RD and IBD (2000 to 2018). Any anti-TNFα dispensations in the two years prior to the index date (MS onset) were identified. Causal directed acyclic graphs (cDAGs) were utilized to illustrate biases like confounders, mediators, and collider-stratification bias, which may influence the relationship between anti-TNFα therapy and MS risk. Advanced statistical techniques were applied to mitigate sparse data biases. These techniques included Firth bias adjustment, data augmentation, Markov Chain Monte Carlo (MCMC), Least Absolute Shrinkage and Selection Operator (LASSO), and Ridge regression, and their results and performance were compared against traditional models via simulation studies. Results: 1) The study found that anti-TNFα therapy was associated with an increased risk of MS in RD patients (pooled incidence rate ratio [IRR]=2.05 [95% confidence interval {CI}, 1.13-3.72]) after adjusting for potential confounders. The number needed to harm was calculated at 2,268 for RD patients. While an increased risk was also observed in IBD patients, the CI was wider (pooled IRR=1.35 [95% CI, 0.70-2.59]). Sensitivity analyses and the computation of E-values were conducted to strengthen the findings. 2) When applying various statistical methods to address sparse data issues, data augmentation and MCMC approaches demonstrated superior performance in bias and mean squared error reduction in simulation studies. Conclusions: The use of anti-TNFα was associated with an increased risk of MS compared with nonusers, especially among patients with RD. The innovative use of cDAGs offers a new perspective on assessing causal relationships and addressing methodological challenges in pharmacoepidemiology. Data augmentation and MCMC approaches should be considered in pharmacoepidemiologic studies with sparse data to avoid drug effect overestimation, which can influence clinical decision-making and public health policies.
Η επιδραση των ψηφιακών συστημάτων και του CRM στην επιλογή τουριστικού προορισμού
Creators: name: Παπαλουκάς, Παναγιώτης
Publisher: name: Πανεπιστήμιο Πειραιώς
Year: 2023
Subjects: subject: Ψηφιακά συστήματα
subject: CRM
subject: Ψηφιακό μάρκετινγκ
subject: Τουριστικός κλάδος
subject: Τουριστικό μάρκετινγκ

description: Η τεχνολογία εξελίσσεται και αναπτύσσεται με ραγδαίους ρυθμούς. Η ανάπτυξη του Διαδικτύου και η δημιουργία και εξέλιξη των πληροφοριακών και των ψηφιακών συστημάτων βοηθούν τις επιχειρήσεις στην προώθηση προϊόντων και υπηρεσιών μέσω νέων καναλιών και ως εκ τούτου τους δίνεται η δυνατότητα να αναπτυχθούν ακόμα περισσότερο. Τη θέση του παραδοσιακού μάρκετινγκ των επιχειρήσεων πλέον έχει πάρει το ψηφιακό μάρκετινγκ. Παρατηρείται, ότι οι επιχειρήσεις εστιάζουν πλέον στο προφίλ των καταναλωτών ώστε να υπάρξει στοχευμένη προώθηση προϊόντων και υπηρεσιών. Συγκεκριμένα, οι τουριστικές επιχειρήσεις χρησιμοποιώντας τα νέα τεχνολογικά εργαλεία έχουν καλύτερη γνώση και κατανόηση των αναγκών των τουριστών με αποτέλεσμα την αποτελεσματική προώθηση προϊόντων και υπηρεσιών. Το ψηφιακό μάρκετινγκ συμβάλλει έμπρακτα προς την κατεύθυνση αυτή χρησιμοποιώντας τα ψηφιακά δεδομένα που συλλέγονται από την εκάστοτε επιχείρηση και με την κατάλληλη επεξεργασία από κατάλληλα εκπαιδευμένα άτομα τίθενται οι επιχειρηματικοί στόχοι. Η παρούσα Διπλωματική Εργασία, μελετά την επίδραση των ψηφιακών συστημάτων και του CRM στη συμπεριφορά των τουριστών ως προς την επιλογή τουριστικών προορισμών. Μέσα από τον προσδιορισμό του προφίλ των τουριστών σκοπός είναι η κατανόηση των αλλαγών στην τουριστική τους συμπεριφορά μέσω της χρήσης της τεχνολογίας και συγκεκριμένα του Διαδικτύου και των ψηφιακών συστημάτων. Επιπρόσθετα, μελετάται η εμπιστοσύνη που δείχνουν οι τουρίστες στα νέα ψηφιακά μέσα τόσο κατά τη χρήση τους όσο και για την εκάστοτε τουριστική τους επιλογή.
title: Practitioner Involvement in Experiential Online Learning in Higher Business Education: A Case Study
Creators: name: Leuenberger, S
Publisher: name: University of Liverpool Repository
Year: 2017

description: The purpose of this thesis is to examine how business professionals involved in experiential online learning can effectively promote business students’ practical management skills development. Another objective is to help business educators to introduce practical relevance in business learning, teaching and assessment through experiential online learning at institutional level. The study adopts a constructivist perspective: new knowledge is constructed from the perspective of an internal researcher, which interacts with the institutional environment and is interrelated with its stakeholders. This study’s research participants are business educators, students, practitioners as well as administrators. The research is conducted within an embedded single-case design while data is collected through various methods and within the researcher’s own institutional context. The research findings section outlines the quantitative outcomes followed by the integrative qualitative discussion, where central categories and their properties and characteristics are presented. The integrative process with the objective to draw theoretical conclusions focusses on three major aspects: namely, practitioners’ effective forms of engagement, business students’ practical management skills development, as well as experiential online learning as the objects of research. In order to address the full scope of the practical aspects, interrelations with the institutional environment are involved. In order to involve practitioners effectively and to institutionalise practitioner-involvement successfully in formally-assessed higher business education, this study suggests a pedagogic framework that defines objectives in terms of practitioners’ instructional orientation and that also adapts their instructional self-conception within an overarching role model. This study further proposes that such a pedagogic framework needs to be harmonised with the intended competence level of learning outcomes and activities, and aligned with educators’ instructional activities and students’ learning in and around the traditional classroom. In addition, this research suggests that the learning context and environment promotes the self-regulated and active engagement of all participants and defines institutional standards and careful integration measures in relation to practitioners’ roles in educational core processes. The thesis concludes by suggesting practical development methods and further research agendas for business educators.
First-principles study of the optical properties of BaMoO3/SrHfO3 hyperbolic metamaterials
Creators: name: Gjerde, Jonathan
name: Jishi, Radi A.
Publisher: name: arXiv
Year: 2023
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: Applied Physics (physics.app-ph)
subject: Computational Physics (physics.comp-ph)
subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: The theoretical applications of hyperbolic metamaterials have generated excitement in multiple fields, particularly in super-resolution optics. In practice, however, the potential of HMMs has been limited by the shortcomings of their constituent parts. Primarily, these are high losses and instabilities in the metal component, which is typically gold or silver, and excessive thickness in both types of layers. In this paper, we use density functional theory to investigate BaMoO3-SrHfO3 metamaterials. We predict that these are hyperbolic throughout the visible range and have the potential to mitigate many of these limitations, including a significant loss reduction. We also examine the accuracy of the effective-medium theory, which is used to predict the bulk optical properties of multilayered HMMs.
Observing exoplanets from Antarctica in two colours: Set-up and operation of ASTEP+
Creators: name: Schmider, François-Xavier
name: Abe, Lyu
name: Agabi, Abdelkrim
name: Bendjoya, Philippe
name: Crouzet, Nicolas
name: Dransfield, Georgina
name: Guillot, Tristan
name: Lai, Olivier
name: Mekarnia, Djamel
name: Suarez, Olga
name: Triaud, Amaury H. M. J.
name: Stee, Philippe
name: Günther, Maximilian N.
name: Breeveld, Dennis
name: Blommaert, Sander
Publisher: name: arXiv
Year: 2023
Subjects: subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: FOS: Physical sciences

description: On December 2021, a new camera box for two-colour simultaneous visible photometry was successfully installed on the ASTEP telescope at the Concordia station in Antarctica. The new focal box offers increased capabilities for the ASTEP+ project. The opto-mechanical design of the camera was described in a previous paper. Here, we focus on the laboratory tests of each of the two cameras, the low-temperature behaviour of the focal box in a thermal chamber, the on-site installation and alignment of the new focal box on the telescope, the measurement of the turbulence in the tube and the operation of the telescope equipped with the new focal box. We also describe the data acquisition and the telescope guiding procedure and provide a first assessment of the performances reached during the first part of the 2022 observation campaign. Observations of the WASP19 field, already observed previously with ASTEP, demonstrates an improvement of the SNR by a factor 1.7, coherent with an increased number of photon by a factor of 3. The throughput of the two cameras is assessed both by calculation of the characteristics of the optics and quantum efficiency of the cameras, and by direct observations on the sky. We find that the ASTEP+ two-colour transmission curves (with a dichroic separating the fluxes at 690nm) are similar to those of GAIA in the blue and red channels, but with a lower transmission in the ASTEP+ red channel leading to a 1.5 magnitude higher B-R value compared to the GAIA B-R value. With this new setting, the ASTEP+ telescope will ensure the follow-up and the characterization of a large number of exoplanetary transits in the coming years in view of the future space missions JWST and Ariel.
description: 12 pages, 12 figures. Proceedings of Ground-based and Airborne Telescopes IX SPIE conference 2022
Dynamics of isolated magnetic bright points derived from Hinode/SOT G-band observations
Creators: name: Utz, D.
name: Hanslmeier, A.
name: Muller, R.
name: Veronig, A.
name: Rybák, J.
name: Muthsam, H.
Publisher: name: arXiv
Year: 2009
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: Small-scale magnetic fields in the solar photosphere can be identified in high-resolution magnetograms or in the G-band as magnetic bright points (MBPs). Rapid motions of these fields can cause magneto-hydrodynamical waves and can also lead to nanoflares by magnetic field braiding and twisting. The MBP velocity distribution is a crucial parameter for estimating the amplitudes of those waves and the amount of energy they can contribute to coronal heating. The velocity and lifetime distributions of MBPs are derived from solar G-band images of a quiet sun region acquired by the Hinode/SOT instrument with different temporal and spatial sampling rates. We developed an automatic segmentation, identification and tracking algorithm to analyse G-Band image sequences to obtain the lifetime and velocity distributions of MBPs. The influence of temporal/spatial sampling rates on these distributions is studied and used to correct the obtained lifetimes and velocity distributions for these digitalisation effects. After the correction of algorithm effects, we obtained a mean MBP lifetime of (2.50 +- 0.05) min and mean MBP velocities, depending on smoothing processes, in the range of (1 - 2) km/s. Corrected for temporal sampling effects, we obtained for the effective velocity distribution a Rayleigh function with a coefficient of (1.62 +- 0.05) km/s. The x- and y- components of the velocity distributions are Gaussians. The lifetime distribution can be fitted by an exponential function.
description: Astronomy and Astrophysics (in press)
Noether theorem in fluid mechanics
Creators: name: Gouin, Henri
Publisher: name: arXiv
Year: 2023
Subjects: subject: Classical Physics (physics.class-ph)
subject: FOS: Physical sciences

description: Invariance theorems in analytical mechanics, such as Noether's theorem, can be adapted to continuum mechanics. For this purpose, it is useful to give a functional representation of the motion and to interpret the groups of invariance with respect to the space of reference associated with Lagrangian variables. A convenient method of calculus uses the Lie derivative. For instance, Kelvin theorems can be obtained by such a method.
Incomplete beta-function expansions of the solutions to the confluent Heun equation
Creators: name: Ishkhanyan, Artur
Publisher: name: arXiv
Year: 2009
Subjects: subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: Several expansions of the solutions to the confluent Heun equation in terms of incomplete Beta functions are constructed. A new type of expansion involving certain combinations of the incomplete Beta functions as expansion functions is introduced. The necessary and sufficient conditions when the derived expansions are terminated, thus generating closed-form solutions, are discussed. It is shown that termination of a Beta-function series solution always leads to a solution that is necessarily an elementary function.
The high-energy emission from GX 339-4 as seen with INTEGRAL and XMM-Newton
Creators: name: Caballero-Garcia, M. D.
name: Miller, J. M.
name: Fabian, A. C.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: GX 339--4 is a well-known microquasar. In this contribution we show the obtained results with the INTEGRAL and XMM-Newton observatories of the outburst undertaken on 2007. The observations cover spectral evolution from the hard, soft intermediate states to the high/soft state. Spectral hardening correlated with the appearance of an skewed Fe line is detected during one of the observations during the soft intermediate state. In all spectral states joint XMM/EPIC-pn, JEM-X, ISGRI and SPI data were fit with the hybrid thermal/non-thermal Comptonization model (EQPAIR). With this model a non-thermal component seems to be required by the data in all the observations. Our results imply evolution in the coronal properties, the most important one being the transition from a compact corona in the first observation to the disappearance of coronal material in the second and re-appearance in the third. We discuss the results obtained in the context of possible physical scenarios for the origin and geometry of the corona and its relation to black hole states.
description: Conference talk. To be published in PoS (the 7th INTEGRAL workshop - An INTEGRAL View of Compact Objects Proceedings)
Additional file 1 of COVID-19 vaccination does not affect male sexual functions
Creators: name: Mehta, Poonam
name: Chakraborty, Arijit
name: Andrabi, Syed Waseem
name: Sharma, Bhawani
name: Kumar, Rakesh
name: Bhaskar, L. V. K. S.
name: Rajender, Singh
Publisher: name: figshare
Year: 2023
Subjects: subject: Biochemistry
subject: Medicine
subject: Molecular Biology
subject: Environmental Sciences not elsewhere classified
subject: Sociology
subject: FOS: Sociology
subject: Cancer
subject: Science Policy

description: Additional file 1.
Changes of radiological examination volumes over the course of the COVID-19 pandemic: a comprehensive analysis of the different waves of infection
Creators: name: Fleckenstein, Florian Nima
name: Maleitzke, Tazio
name: Böning, Georg
name: Kahl, Vinzent
name: Petukhova-Greenstein, Alexandra
name: Kucukkaya, Ahmet Said
name: Gebauer, Bernhard
name: Hamm, Bernd
name: Aigner, Annette
Publisher: name: Charité - Universitätsmedizin Berlin
Year: 2022
Subjects: subject: SARS-CoV-2
subject: Lockdown
subject: Public Health
subject: Crisis
subject: Healthcare
subject: 600 Technik, Medizin, angewandte Wissenschaften::610 Medizin und Gesundheit::610 Medizin und Gesundheit

description: Objectives: Data from radiological departments provide important information on overall quantities of medical care provided. With this study we used a comprehensive analysis of radiological examinations as a surrogate marker to quantify the effect of the different COVID-19 waves on medical care provided. Methods: Radiological examination volumes during the different waves of infection were compared among each other as well as to time-matched control periods from pre-pandemic years using a locally weighted scatterplot smoothing as well as negative binominal regression models. Results: A total of 1,321,119 radiological examinations were analyzed. Examination volumes were reduced by about 10% over the whole study period (IRR = 0.90; 95% CI 0.89-0.92), with a focus on acute medical care (0.84; 0.83-0.85) and outpatients (0.93: 0.90-0.97). When compared to wave 1, examination volumes were about 17% higher during wave 2 (1.17; 1.10-1.25), and 33% higher in wave 3 of the pandemic (1.33; 1.24-1.42). Conclusions: This study shows the severe effect of COVID-19 pandemic and related shutdown measures on overall provided medical care as measured by radiological examinations. When compared, the decrease of medical care was more pronounced in the earlier waves of the pandemic.
Bardeen Compact Stars in Modified $f(R)$ Gravity with Conformal Motion
Creators: name: Shamir, M. Farasat
name: Rashid, Aisha
Publisher: name: arXiv
Year: 2023
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: The main emphasis of this paper is to find the viable solutions of Einstein Maxwell fields equations of compact star in context of modified $f(R)$ theory of gravity. Two different models of modified $f(R)$ gravity are considered. In particular, we choose isotropic matter distribution and Bardeen's model for compact star to find the boundary conditions as an exterior space-time geometry. We use the conformal Killing geometry to compute the metric potentials. We discuss the behavior of energy density and pressure distribution for both models. Moreover, we analyze different physical properties such as behavior of energy density and pressure, equilibrium conditions, equation of state parameters, causality conditions and adiabatic index. It is noticed that both $f(R)$ gravity models are suitable and provides viable results with Bardeen geometry.
description: 13 pages, 11 figures
Do German university medical centres promote robust and transparent research? A cross-sectional study of institutional policies
Creators: name: Holst, Martin R.
name: Faust, A.
name: Strech, Daniel
Publisher: name: Charité - Universitätsmedizin Berlin
Year: 2022
Subjects: subject: Science policy
subject: Incentives
subject: Robustness
subject: Transparency
subject: Open science
subject: University medical centre
subject: 600 Technik, Medizin, angewandte Wissenschaften::610 Medizin und Gesundheit::610 Medizin und Gesundheit

description: Background: In light of replication and translational failures, biomedical research practices have recently come under scrutiny. Experts have pointed out that the current incentive structures at research institutions do not sufficiently incentivise researchers to invest in robustness and transparency and instead incentivise them to optimize their fitness in the struggle for publications and grants. This cross-sectional study aimed to describe whether and how relevant policies of university medical centres in Germany support the robust and transparent conduct of research and how prevalent traditional metrics are. Methods: For 38 German university medical centres, we searched for institutional policies for academic degrees and academic appointments as well as websites for their core facilities and research in general between December 2020 and February 2021. We screened the documents for mentions of indicators of robust and transparent research (study registration; reporting of results; sharing of research data, code and protocols; open access; and measures to increase robustness) and for mentions of more traditional metrics of career progression (number of publications; number and value of awarded grants; impact factors; and authorship order). Results: While open access was mentioned in 16% of PhD regulations, other indicators of robust and transparent research were mentioned in less than 10% of institutional policies for academic degrees and academic appointments. These indicators were more frequently mentioned on the core facility and general research websites. Institutional policies for academic degrees and academic appointments had frequent mentions of traditional metrics. Conclusions: References to robust and transparent research practices are, with a few exceptions, generally uncommon in institutional policies at German university medical centres, while traditional criteria for academic promotion and tenure still prevail.
Pushing limits: Probing new gravity using a satellite constellation
Creators: name: Toth, Viktor T.
Publisher: name: arXiv
Year: 2025
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: Building upon earlier work, we explore the limits of using a configuration of satellites to measure the trace of the gravitational gradient tensor using intersatellite laser ranging and timing observables without relying on high-precision external observables such as deep space radio navigation or astrometry with unrealistic accuracy. A refined model, calculated with extended numerical precision, confirms that exceptional sensitivity is possible, placing within reach observational tests of certain modified gravity theories (e.g., Yukawa terms, galileons) using heliocentric orbits in the vicinity of the Earth. The sensitivity of the experiment improves at larger heliocentric distances. A constellation placed at 30 astronomical units, still well within the domain of feasibility using available propulsion and deep space communication technologies, may approach sensitivities that are sufficient to detect not just the gravitational contribution of the interplanetary medium but perhaps even cosmological dark matter and dark energy constituents.
description: 17 pages, 6 figures; final submitted version
DNA methylation reveals distinct cells of origin for pancreatic neuroendocrine carcinomas and pancreatic neuroendocrine tumors
Creators: name: Simon, Tincy
name: Riemer, Pamela
name: Jarosch, Armin
name: Detjen, Katharina
name: Domenico, Annunziata Di
name: Bormann, Felix
name: Menne, Andrea
name: Khouja, Slim
name: Monjé, Nanna
name: Childs, Liam H.
name: Lenze, Dido
name: Leser, Ulf
name: Rossner, Florian
name: Morkel, Markus
name: Blüthgen, Nils
name: Pavel, Marianne
name: Horst, David
name: Capper, David
name: Marinoni, Ilaria
name: Perren, Aurel
name: Mamlouk, Soulafa
name: Sers, Christine
Publisher: name: Charité - Universitätsmedizin Berlin
Year: 2022
Subjects: subject: Cell-of-origin
subject: Epigenetics
subject: Pancreatic neuroendocrine neoplasm
subject: 600 Technik, Medizin, angewandte Wissenschaften::610 Medizin und Gesundheit::610 Medizin und Gesundheit

description: Background: Pancreatic neuroendocrine neoplasms (PanNENs) fall into two subclasses: the well-differentiated, low- to high-grade pancreatic neuroendocrine tumors (PanNETs), and the poorly-differentiated, high-grade pancreatic neuroendocrine carcinomas (PanNECs). While recent studies suggest an endocrine descent of PanNETs, the origin of PanNECs remains unknown. Methods: We performed DNA methylation analysis for 57 PanNEN samples and found that distinct methylation profiles separated PanNENs into two major groups, clearly distinguishing high-grade PanNECs from other PanNETs including high-grade NETG3. DNA alterations and immunohistochemistry of cell-type markers PDX1, ARX, and SOX9 were utilized to further characterize PanNECs and their cell of origin in the pancreas. Results: Phylo-epigenetic and cell-type signature features derived from alpha, beta, acinar, and ductal adult cells suggest an exocrine cell of origin for PanNECs, thus separating them in cell lineage from other PanNENs of endocrine origin. Conclusions: Our study provides a robust and clinically applicable method to clearly distinguish PanNECs from G3 PanNETs, improving patient stratification.
Three papers examining how employees and audiences understand and evaluate occupations
Creators: name: Frické, Pascale Haworth
Publisher: name: University of British Columbia
Year: 2024

description: Extant research on how employees and audiences understand and evaluate occupations encounters multiple challenges, including a narrow focus on group-level processes within occupational communities that often neglects employees’ daily work experiences and a lack of theoretical and methodological diversity. This dissertation comprises three papers that address these challenges and offer novel insights into how employees assess and find meaning in their occupations, as well as how they are affected by others’ evaluations of their occupations. The first paper employs qualitative methods to examine how occupational ideologies shape employees’ understandings of their work. Management scholars traditionally conceptualize occupational ideologies as a positive resource for work meaningfulness. In contrast, this study reveals that occupational ideologies can be untethered from daily work realities, producing a disconnect that threatens, rather than enhances, employees’ experience of work meaningfulness. It further develops a process model to understand how employees negotiate this disconnect, thereby advancing the literatures on occupational ideologies and meaningful work. The subsequent papers pivot to exploring audience evaluations of occupations and their impact on employees. The literature on social evaluations of occupations concentrates on employees’ reactions to situations when a critical mass of outsiders share a negative or positive view of their occupation, and, in particular, whether employees accept or reject these evaluations. This approach overlooks two crucial details. First, employees’ work experiences are more directly shaped by explicit outsider evaluations than by overarching societal attitudes. Second, the impact of these evaluations extends beyond employees’ mere acceptance or rejection of them and their associated identity work. Consequently, the second paper develops two measurement scales for employees to quantify their exposure to enacted negative occupational evaluations (NOE) and positive occupational evaluations (POE), creating a basis for novel discussions to arise about the effects of these explicit evaluations on employees. The third paper investigates the effects of NOE and POE on employees through a multi-wave field survey with a Canadian police union. By exploring the interplay between social anxiety with outsiders and employees’ acceptance and rejection of occupational evaluations as (in)appropriate, this paper clarifies the processes through which NOE and POE influence important employee behaviors.
Additional file 2 of Disruption of DDX53 coding sequence has limited impact on iPSC-derived human NGN2 neurons
Creators: name: Faheem, Muhammad
name: Deneault, Eric
name: Alexandrova, Roumiana
name: Rodrigues, Deivid C.
name: Pellecchia, Giovanna
name: Shum, Carole
name: Zarrei, Mehdi
name: Piekna, Alina
name: Wei, Wei
name: Howe, Jennifer L.
name: Thiruvahindrapuram, Bhooma
name: Lamoureux, Sylvia
name: Ross, P. Joel
name: Bradley, Clarrisa A.
name: Ellis, James
name: Scherer, Stephen W.
Publisher: name: figshare
Year: 2023
Subjects: subject: Genetics
subject: FOS: Biological sciences

description: Additional file 2. Supplementary figure.
The Omega Rule is $\mathbf{Π_{1}^{1}}$-Complete in the $λβ$-Calculus
Creators: name: Intrigila, Benedetto
name: Statman, Richard
Publisher: name: arXiv
Year: 2009
Subjects: subject: Logic in Computer Science (cs.LO)
subject: FOS: Computer and information sciences
subject: F.4.1

description: In a functional calculus, the so called Ω-rule states that if two terms P and Q applied to any closed term N return the same value (i.e. PN = QN), then they are equal (i.e. P = Q holds). As it is well known, in the λβ-calculus the Ω-rule does not hold, even when the η-rule (weak extensionality) is added to the calculus. A long-standing problem of H. Barendregt (1975) concerns the determination of the logical power of the Ω-rule when added to the λβ-calculus. In this paper we solve the problem, by showing that the resulting theory is Π\_{1}^{1}-complete.
Reissner-Nordstrom black hole in noncommutative spaces
Creators: name: Alavi, S. A.
Publisher: name: arXiv
Year: 2009
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We investigate the behaviour of a non-commutative radiating Reissner-Nordstrom(Re-No)black hole. We find some interesting results : a). the existence of a minimal non-zero mass to which the black hole can shrink. b). a finite maximum temperature that the black hole can reach before cooling down to absolute zero. c) compared to the neutral black holes the effect of charge is to increase the minimal non-zero mass and lower the maximum temperature. d) the absence of any curvature singularity. We also derive some essential thermodynamic quantities from which we study the stability of the black hole. Finally we find an upper bound for the non-commutativity parameter $θ$.
description: 9 pages, accepted for publication in Acta Physica Polonica B
Contamination of CT scanner surfaces with SARS-CoV-2 and infective potential after examination of invasively ventilated, non-invasively ventilated and non-ventilated patients with positive throat swabs: prospective investigation using real-time reverse-transcription PCR and viral cell culture
Creators: name: Göhler, Friedemann
name: Corman, Victor M.
name: Bleicker, Tobias
name: Stroux, Andrea
name: Dewey, Marc
name: Diekhoff, Torsten
Publisher: name: Charité - Universitätsmedizin Berlin
Year: 2022
Subjects: subject: SARS-CoV-2
subject: COVID-19
subject: Disease transmission (Infectious)
subject: Cross infection
subject: 600 Technik, Medizin, angewandte Wissenschaften::610 Medizin und Gesundheit::610 Medizin und Gesundheit

description: Background: During the current severe acute respiratory syndrome coronavirus type 2 (SARS-CoV-2) pandemic, computed tomography (CT) has become widely used in patients with suspected or known coronavirus disease 2019 (COVID-19). This prospective observational study in 28 invasively ventilated and 18 non-invasively ventilated patients with confirmed SARS-CoV-2 contamination aims at investigating SARS-CoV-2 contamination of CT scanner surfaces and its infectiousness. Methods: Swab sampling of the CT table and gantry before and after CT examinations was performed. Additionally, the CT ventilation system air grid was wiped off after each examination. Real-time reverse-transcription polymerase chain reaction (RT-PCR) for SARS-CoV-2 RNA (ribonucleic acid) and viral cell culture were performed in the virology core lab. Results: After examination of non-invasively ventilated or non-ventilated patients, SARS-CoV-2 RNA was found in 11.1% (4/36) on patient near surfaces (CT table and gantry) and in 16.7% (3/18) on the CT air grid respectively after examination of invasively ventilated patients in 5.4% (3/56) on CT table and gantry and 7.1% (2/28) on the CT air grid. Surface contamination was more common in non-invasively ventilated or non-ventilated patients with a high viral load who were actively coughing. RT-PCR cycle threshold (Ct) was high (35.96-39.31) in all positive samples and no positive viral cell culture was found. Conclusion: Our study suggests that CT scanner surface contamination with SARS-CoV-2 is considerable and more common after examination of non-invasively ventilated or non-ventilated patients compared to invasively ventilated patients. However, no viral cell culture positivity was found, hence the infectious potential seems low.
Observed and personally experienced discrimination: findings of a cross-sectional survey of physicians and nursing staff
Creators: name: Yolci, Arda
name: Schenk, Liane
name: Sonntag, Pia-Theresa
name: Peppler, Lisa
name: Schouler-Ocak, Meryam
name: Schneider, Anna
Publisher: name: Charité - Universitätsmedizin Berlin
Year: 2022
Subjects: subject: Discrimination
subject: Healthcare staff
subject: Hospital
subject: Ethnicity
subject: Migration
subject: Cultural competence
subject: Germany
subject: 600 Technik, Medizin, angewandte Wissenschaften::610 Medizin und Gesundheit::610 Medizin und Gesundheit

description: Background: Discrimination against hospital staff based on ascribed features is prevalent in healthcare systems worldwide. Detrimental effects on health and quality of patient care have been shown. Our study aims to describe and analyse the discrimination experiences of both physicians and nurses, specifically for the German hospital context. Methods: A cross-sectional online survey on observed and personally experienced discrimination at work addressed staff from 22 hospitals of two organizations in Germany. Sociodemographic and occupational as well as institutional characteristics served as independent variables. In multivariable analyses, block- and stepwise logistic regressions were calculated for the two dependent variables (witness and victim of discrimination). Sensitivity analyses with imputed data for missings were performed. Results: N = 800 healthcare professionals (n = 243 physicians, n = 557 nurses; response rate: 5.9%) participated in the survey. 305 respondents (38.1%) were witnesses of discrimination, while 108 respondents (13.5%) were victims of discrimination in their wards. Reasons for observed discriminatory acts were predominantly attributed to the ethnicity of the person concerned, their appearance and language, whereas personally affected staff most frequently cited gender as a reason, followed by ethnicity, and physical appearance. In multivariable models, cultural competence significantly increased the likelihood of witnessing discrimination (beta = .575; p = .037). In terms of the likelihood of being a victim of discrimination, in addition to cultural competence (beta = 2.838; p = < .001), the interaction of the effects of gender and professional group was statistically significant (beta = .280; p = .010). Conclusions: Given the extent of experienced and observed discrimination, appropriate institutional responses are needed. Further research on discriminatory structures in the German-speaking health care system should focus on discrimination at the intersection of ethnicity, gender and occupation.
Multiqubits Entanglement Based on Optimal Witness
Creators: name: Zhao, Ming-Jing
name: Wang, Zhi-Xi
name: Fei, Shao-Ming
Publisher: name: arXiv
Year: 2009
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We study the optimal entanglement witness with respect to multiqubits W-states. We show such entanglement witnesses can be used to distinguish genuine entangled states, different biseparable states and fully separable states.
description: 8 pages
Position and frequency shifts induced by massive modes of the gravitational wave background in alternative gravity
Creators: name: Bellucci, S.
name: Capozziello, S.
name: De Laurentis, M.
name: Faraoni, V.
Publisher: name: arXiv
Year: 2008
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: Alternative theories of gravity predict the presence of massive scalar, vector, and tensor gravitational wave modes in addition to the standard massless spin~2 graviton of general relativity. The deflection and frequency shift effects on light from distant sources propagating through a stochastic background of gravitational waves, containing such modes, differ from their counterparts in general relativity. Such effects are considered as a possible signature for alternative gravity in attempts to detect deviations from Einstein's gravity by astrophysical means.
description: 9 pages, 1 figure