cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Data: A particle-based approach to predict the success and selectivity of leaching processes
Creators: name: Winardhi, Chandra Widyananda
name: Da Assuncao Godinho, Jose Ricardo
name: Gutzmer, Jens
name: Rachmawati, Cindytami
Publisher: name: Rodare
Year: 2021

description: Raw CT data which are used to calculate the dissolution rates and particles data which are used for the leaching simulation from the article "A particle-based approach to predict the success and selectivity of leaching processes using ethaline - Comparison of simulated and experimental results". Chandra Widyananda Winardhi, Jose Ricardo da Assuncao Godinho, Cindy Rachmawati, Isabelle Duhamel Achin, Ainhoa Unzurrunzaga Iturbe, Gero Frisch, Jens Gutzmer
 https://doi.org/10.1016/j.hydromet.2022.105869
description: Funded by European Union's Horizon 2020 Research and Innovation Program under Grant Agreement 815748
Construction of dual-labelled E. coli strains to study the effects of antibiotics and microbiota on the horizontal transfer of ESBL genes in the in vitro chicken caecal microbiota
Creators: name: Cardenas-Rey, Ingrid
name: Poirier, Aurore
name: La Regione, Roberto
name: Campling, Elaine
name: Armson, Bryony
name: Cantlay, Jennifer
name: Brouwer, Michael
Publisher: name: Zenodo
Year: 2022
Subjects: AMR, broiler, microbiome, ESBL, fluorescence

description: Short Term Missions (STMs) are small travel grants with the aim of sharing scientific expertise, methodologies, equipment and facilities to harmonise the existing approaches and methodologies within the large OHEJP network, and to drive the research forward in a collaborative and non-duplicative fashion to strengthen both the scientific capacity within the OHEJP and also future prevention, preparedness, detection and response of the EU to foodborne and other emerging threats across human-animal-environmental sectors.
Di-higgs enhancement by neutral scalar as probe of new colored sector
Creators: name: Nakamura, Koji
name: Nishiwaki, Kenji
name: Oda, Kin-ya
name: Park, Seong Chan
name: Yamamoto, Yasuhiro
Publisher: name: arXiv
Year: 2017
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We study a class of models in which the Higgs pair production is enhanced at hadron colliders by an extra neutral scalar. The scalar particle is produced by the gluon fusion via a loop of new colored particles, and decays into di-Higgs through its mixing with the Standard Model Higgs. Such a colored particle can be the top/bottom partner, such as in the dilaton model, or a colored scalar which can be triplet, sextet, octet, etc., called leptoquark, diquark, coloron, etc., respectively. We examine the experimental constraints from the latest Large Hadron Collider (LHC) data, and discuss the future prospects of the LHC and the Future Circular Collider up to 100TeV. We also point out that the 2.4$σ$ excess in the $b\bar bγγ$ final state reported by the ATLAS experiment can be interpreted as the resonance of the neutral scalar at 300GeV.
description: 27 pages, 10 figures (v1); references added, 28 pages (v2); minor modifications, published version (v3)
Bayesian Probabilistic Numerical Methods
Creators: name: Cockayne, Jon
name: Oates, Chris
name: Sullivan, Tim
name: Girolami, Mark
Publisher: name: arXiv
Year: 2017
Subjects: subject: Methodology (stat.ME)
subject: Numerical Analysis (math.NA)
subject: Statistics Theory (math.ST)
subject: Computation (stat.CO)
subject: FOS: Computer and information sciences
subject: FOS: Mathematics

description: The emergent field of probabilistic numerics has thus far lacked clear statistical principals. This paper establishes Bayesian probabilistic numerical methods as those which can be cast as solutions to certain inverse problems within the Bayesian framework. This allows us to establish general conditions under which Bayesian probabilistic numerical methods are well-defined, encompassing both non-linear and non-Gaussian models. For general computation, a numerical approximation scheme is proposed and its asymptotic convergence established. The theoretical development is then extended to pipelines of computation, wherein probabilistic numerical methods are composed to solve more challenging numerical tasks. The contribution highlights an important research frontier at the interface of numerical analysis and uncertainty quantification, with a challenging industrial application presented.
Fast computation of quadrupole and hexadecapole approximations in microlensing with a single point-source evaluation
Creators: name: Cassan, A.
Publisher: name: arXiv
Year: 2017
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: FOS: Physical sciences

description: The exoplanet detection rate from gravitational microlensing has grown significantly in recent years thanks to a great enhancement of resources and improved observational strategy. Current observatories include ground-based wide-field and/or robotic world-wide networks of telescopes, as well as space-based observatories such as satellites Spitzer or Kepler/K2. This results in a large quantity of data to be processed and analyzed, which is a challenge for modeling codes because of the complexity of the parameter space to be explored, and the intensive computations required to evaluate the models. In this work, I present a method that allows to compute the quadrupole and hexadecapole approximation of the finite-source magnification with more efficiency that previously available codes, with routines about x6 and x4 faster respectively. The quadrupole takes just about twice the time of a point-source evaluation, which advocates for generalizing its use to large portion of the light curves. The corresponding routines are available as open-source python codes.
description: Published in MNRAS (7 pages, 2 figures, 1 table). Open source codes available on GitHub (cf. reference in the paper)
Entropic-Wasserstein barycenters: PDE characterization, regularity and CLT
Creators: name: Carlier, Guillaume
name: Eichinger, Katharina
name: Kroshnin, Alexey
Publisher: name: arXiv
Year: 2020
Subjects: subject: Analysis of PDEs (math.AP)
subject: Probability (math.PR)
subject: FOS: Mathematics
subject: 49Q25, 35J96, 60B12

description: In this paper, we investigate properties of entropy-penalized Wasserstein barycenters introduced by Bigot, Cazelles and Papadakis (2019) as a regularization of Wasserstein barycenters first presented by Agueh and Carlier (2011). After characterizing these barycenters in terms of a system of Monge-Ampère equations, we prove some global moment and Sobolev bounds as well as higher regularity properties. We finally establish a central limit theorem for entropic-Wasserstein barycenters.
description: 46 pages, accepted in SIMA
Hans Fernández (ed.): Convivencias, malvivencias y diálogos (im)posibles. Literaturas indígenas de Sudamérica e Isla de Pascua. Berlin: Peter Lang Verlag, 2018 (106 páginas).
Creators: name: Dill, Hans-Otto
Publisher: name: Humboldt-Universität zu Berlin
Year: 2023
Subjects: subject: 860 Literaturen in spanischer, portugiesischer, galicischer Sprache

description: This publication is with permission of the rights owner (De Gruyter) freely accessible.
Solving Inverse Problems by Joint Posterior Maximization with Autoencoding Prior
Creators: name: González, Mario
name: Almansa, Andrés
name: Tan, Pauline
Publisher: name: arXiv
Year: 2021
Subjects: subject: Machine Learning (stat.ML)
subject: Computer Vision and Pattern Recognition (cs.CV)
subject: Machine Learning (cs.LG)
subject: Image and Video Processing (eess.IV)
subject: Optimization and Control (math.OC)
subject: FOS: Computer and information sciences
subject: FOS: Electrical engineering, electronic engineering, information engineering
subject: FOS: Mathematics

description: In this work we address the problem of solving ill-posed inverse problems in imaging where the prior is a variational autoencoder (VAE). Specifically we consider the decoupled case where the prior is trained once and can be reused for many different log-concave degradation models without retraining. Whereas previous MAP-based approaches to this problem lead to highly non-convex optimization algorithms, our approach computes the joint (space-latent) MAP that naturally leads to alternate optimization algorithms and to the use of a stochastic encoder to accelerate computations. The resulting technique (JPMAP) performs Joint Posterior Maximization using an Autoencoding Prior. We show theoretical and experimental evidence that the proposed objective function is quite close to bi-convex. Indeed it satisfies a weak bi-convexity property which is sufficient to guarantee that our optimization scheme converges to a stationary point. We also highlight the importance of correctly training the VAE using a denoising criterion, in order to ensure that the encoder generalizes well to out-of-distribution images, without affecting the quality of the generative model. This simple modification is key to providing robustness to the whole procedure. Finally we show how our joint MAP methodology relates to more common MAP approaches, and we propose a continuation scheme that makes use of our JPMAP algorithm to provide more robust MAP estimates. Experimental results also show the higher quality of the solutions obtained by our JPMAP approach with respect to other non-convex MAP approaches which more often get stuck in spurious local optima.
description: arXiv admin note: text overlap with arXiv:1911.06379
On the Automorphisms of a Rank One Deligne-Hitchin Moduli Space
Creators: name: Biswas, Indranil
name: Heller, Sebastian
Publisher: name: arXiv
Year: 2017
Subjects: subject: Algebraic Geometry (math.AG)
subject: FOS: Mathematics
subject: 14D20, 14J50, 14H60

description: Let $X$ be a compact connected Riemann surface of genus $g \geq 2$, and let ${\mathcal M}_{\rm DH}$ be the rank one Deligne-Hitchin moduli space associated to $X$. It is known that ${\mathcal M}_{\rm DH}$ is the twistor space for the hyper-Kähler structure on the moduli space of rank one holomorphic connections on $X$. We investigate the group $\operatorname{Aut}({\mathcal M}_{\rm DH})$ of all holomorphic automorphisms of ${\mathcal M}_{\rm DH}$. The connected component of $\operatorname{Aut}({\mathcal M}_{\rm DH})$ containing the identity automorphism is computed. There is a natural element of $H^2({\mathcal M}_{\rm DH}, {\mathbb Z})$. We also compute the subgroup of $\operatorname{Aut}({\mathcal M}_{\rm DH})$ that fixes this second cohomology class. Since ${\mathcal M}_{\rm DH}$ admits an ample rational curve, the notion of algebraic dimension extends to it by a theorem of Verbitsky. We prove that ${\mathcal M}_{\rm DH}$ is Moishezon.
Bayesian imaging using Plug & Play priors: when Langevin meets Tweedie
Creators: name: Laumont, Rémi
name: de Bortoli, Valentin
name: Almansa, Andrés
name: Delon, Julie
name: Durmus, Alain
name: Pereyra, Marcelo
Publisher: name: arXiv
Year: 2021
Subjects: subject: Methodology (stat.ME)
subject: Computer Vision and Pattern Recognition (cs.CV)
subject: Image and Video Processing (eess.IV)
subject: Statistics Theory (math.ST)
subject: Machine Learning (stat.ML)
subject: FOS: Computer and information sciences
subject: FOS: Electrical engineering, electronic engineering, information engineering
subject: FOS: Mathematics
subject: 65K10, 65K05, 65D18, 62F15, 62C10, 68Q25, 68U10, 90C26

description: Since the seminal work of Venkatakrishnan et al. in 2013, Plug & Play (PnP) methods have become ubiquitous in Bayesian imaging. These methods derive Minimum Mean Square Error (MMSE) or Maximum A Posteriori (MAP) estimators for inverse problems in imaging by combining an explicit likelihood function with a prior that is implicitly defined by an image denoising algorithm. The PnP algorithms proposed in the literature mainly differ in the iterative schemes they use for optimisation or for sampling. In the case of optimisation schemes, some recent works guarantee the convergence to a fixed point, albeit not necessarily a MAP estimate. In the case of sampling schemes, to the best of our knowledge, there is no known proof of convergence. There also remain important open questions regarding whether the underlying Bayesian models and estimators are well defined, well-posed, and have the basic regularity properties required to support these numerical schemes. To address these limitations, this paper develops theory, methods, and provably convergent algorithms for performing Bayesian inference with PnP priors. We introduce two algorithms: 1) PnP-ULA (Unadjusted Langevin Algorithm) for Monte Carlo sampling and MMSE inference; and 2) PnP-SGD (Stochastic Gradient Descent) for MAP inference. Using recent results on the quantitative convergence of Markov chains, we establish detailed convergence guarantees for these two algorithms under realistic assumptions on the denoising operators used, with special attention to denoisers based on deep neural networks. We also show that these algorithms approximately target a decision-theoretically optimal Bayesian model that is well-posed. The proposed algorithms are demonstrated on several canonical problems such as image deblurring, inpainting, and denoising, where they are used for point estimation as well as for uncertainty visualisation and quantification.
Lifshitz Anomalies, Ward Identities and Split Dimensional Regularization
Creators: name: Arav, Igal
name: Oz, Yaron
name: Raviv-Moshe, Avia
Publisher: name: arXiv
Year: 2016
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We analyze the structure of the stress-energy tensor correlation functions in Lifshitz field theories and construct the corresponding anomalous Ward identities. We develop a framework for calculating the anomaly coefficients that employs a split dimensional regularization and the pole residues. We demonstrate the procedure by calculating the free scalar Lifshitz scale anomalies in $2+1$ spacetime dimensions. We find that the analysis of the regularization dependent trivial terms requires a curved spacetime description without a foliation structure. We discuss potential ambiguities in Lifshitz scale anomaly definitions.
description: 68 pages, 3 figures; Added some clarifications, references and acknowledgments
Horizon Quantum Mechanics of Rotating Black Holes
Creators: name: Casadio, Roberto
name: Giugno, Andrea
name: Giusti, Andrea
name: Micu, Octavian
Publisher: name: arXiv
Year: 2017
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Theory (hep-th)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: The Horizon Quantum Mechanics is an approach that was previously introduced in order to analyse the gravitational radius of spherically symmetric systems and compute the probability that a given quantum state is a black hole. In this work, we first extend the formalism to general space-times with asymptotic (ADM) mass and angular momentum. We then apply the extended Horizon Quantum Mechanics to a harmonic model of rotating corpuscular black holes. We find that simple configurations of this model naturally suppress the appearance of the inner horizon and seem to disfavour extremal (macroscopic) geometries.
description: 22 pages, 6 figures. Final version to appear in EPJ C
Effectiveness of alternative approaches to integrating SDOH into medical education: a scoping review
Creators: name: NOUR, NEHAL
name: Stuckler, David
name: Ajayi, Oluwatobi
name: Abdalla, Mohamed Elhassan
Publisher: name: University of Limerick
Year: 2023
Subjects: subject: Health sciences
subject: FOS: Health sciences

description: Background There is increasing recognition of including social determinants of health (SDOH) in teaching for future doctors. However, the educational methods and the extent of integration into the curriculum vary considerably—this scoping review is aimed at how SDOH has been introduced into medical schools’ curricula. Methods A systematic search was performed of six electronic databases, including PubMed, Education Source, Scopus, OVID (Medline), APA Psych Info, and ERIC. Articles were excluded if they did not cover the SDOH curriculum for medical students; were based on service-learning rather than didactic content; were pilot courses, or were not in English, leaving eight articles in the fnal study. Results The initial search yielded 654 articles after removing duplicates. In the frst screening step, 588 articles were excluded after applying inclusion and exclusion criteria and quality assessment; we examined 66 articles, a total of eight included in the study. There was considerable heterogeneity in the content, structure and duration of SDOH curricula. Of the eight included studies, six were in the United States(U.S.), one in the United Kingdom (U.K.) and one in Israel. Four main conceptual frameworks were invoked: the U.S. Healthy People 2020, two World Health Organisation frameworks (The Life Course and the Michael Marmot’s Social Determinants of Health), and the National Academic of Science, Engineering, and Medicine’s (Framework For educating Health Professionals to Address the Social Determinants of Health). In general, programs that lasted longer appeared to perform better than shorter-duration programmes. Students favoured interactive, experiential-learning teaching methods over the traditional classroom-based teaching methods. Conclusion The incorporation of well-structured SDOH curricula capturing both local specifcation and a global framework, combined with a combination of traditional and interactive teaching methods over extended periods, may be helpful in steps for creating lifelong learners and socially accountable medical school education
Direct observation of self energy signatures of the resonant collective mode in Bi2Sr2CaCu2O8
Creators: name: Mou, Daixiang
name: Gu, Genda
name: Kaminski, Adam
Publisher: name: arXiv
Year: 2017
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: We use high resolution ARPES to study the resonant, collective excitation mode in the superconducting state of Bi2212. By collecting very high quality data we found new features in the self energy in the antinodal region, where the interaction of electrons with the mode is the strongest. This interaction leads to pronounced peak in the scattering rate and we demonstrate that this feature is directly responsible for well known hump-dip-peak structure in cuprates. By studying how the weight of this peak changes with temperature we unequivocally demonstrate that interaction of electrons with resonant mode in cuprates vanishes at Tc and is very much localized in the momentum space close to the antinode. These findings present a consistent picture of line shape and self energy signatures of the electron-boson coupling in cuprates and resolve long standing controversy surrounding this issue. The momentum dependence of the strength of electron-mode interaction enables development of quantitative theory of this phenomenon in cuprates.
description: 5 pages, 5 figures
Maximizing Tc by tuning nematicity and magnetism in FeSe1-xSx superconductors
Creators: name: Matsuura, K.
name: Mizukami, Y.
name: Arai, Y.
name: Sugimura, Y.
name: Maejima, N.
name: Machida, A.
name: Watanuki, T.
name: Fukuda, T.
name: Yajima, T.
name: Hiroi, Z.
name: Yip, K. Y.
name: Chan, Y. C.
name: Niu, Q.
name: Hosoi, S.
name: Ishida, K.
name: Mukasa, K.
name: Kasahara, S.
name: Cheng, J. -G.
name: Goh, S. K.
name: Matsuda, Y.
name: Uwatoko, Y.
name: Shibauchi, T.
Publisher: name: arXiv
Year: 2017
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: Materials Science (cond-mat.mtrl-sci)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: A fundamental issue concerning iron-based superconductivity is the roles of electronic nematicity and magnetism in realising high transition temperature ($T_{\rm c}$). To address this issue, FeSe is a key material, as it exhibits a unique pressure phase diagram involving nonmagnetic nematic and pressure-induced antiferromagnetic ordered phases. However, as these two phases in FeSe overlap with each other, the effects of two orders on superconductivity remain perplexing. Here we construct the three-dimensional electronic phase diagram, temperature ($T$) against pressure ($P$) and isovalent S-substitution ($x$), for FeSe$_{1-x}$S$_{x}$, in which we achieve a complete separation of nematic and antiferromagnetic phases. In between, an extended nonmagnetic tetragonal phase emerges, where we find a striking enhancement of $T_{\rm c}$. The completed phase diagram uncovers two superconducting domes with similarly high $T_{\rm c}$ on both ends of the dome-shaped antiferromagnetic phase. The $T_{\rm c}(P,x)$ variation implies that nematic fluctuations unless accompanying magnetism are not relevant for high-$T_{\rm c}$ superconductivity in this system.
description: 8 pages, 9 figures. A revised version will appear in Nature Communications
The Turing Way Book Dash: 16-20 November 2022
Creators: name: Sharan, Malvika
name: Steele, Anne Lee
name: Bennett, Arielle
name: Karone, Emma
name: Plomp, Esther
name: Karvovskaya, Lena
Publisher: name: Zenodo
Year: 2022

description: The Turing Way Book Dash events are a less intense version of Book Sprints, where participants collaboratively work on The Turing Way book synchronously to develop new chapters and review/edit existing ones to make them more accessible, comprehensive and up-to-date.
 They also contribute to enhancing the project by improving the ways we work in the community and take lead on accomplishing different tasks or subprojects. The November edition of Book Dash featured 19 invited contributors, 6 committee members, 14 online working sessions, four discussions and social events, and two community share-outs. In the past, we have organised 1-1.5 day long Book Dash events in person or partially remote.
 However, since November 2020, we have been hosting Book Dashes online and with multiple short co-working called development sessions spread over 5 days for flexible participation by members.
 We developed this format to allow people in different time zones to participate with the same efficiency and equitable support.
 This involved creating multiple small development sessions throughout the day, adding dedicated sessions for informal social interactions, developing shared documents with all the information, providing support funds to ensure that everyone can comfortably participate and hosting a pre-event call to communicate these resources to everyone. Like the previous Book Dash in 2022, this time we also had local hubs hosted in London and Amsterdam with modification introduced for the in-person participants to plan their day offline.
title: ‘Data Saves Lives’: Data Work in a Healthcare Business Intelligence Unit
Creators: name: Pedersen, Asbjoern M.
Publisher: name: European Society for Socially Embedded Technologies (EUSSET)
Year: 2023

description: Big Data and the digitalization of healthcare have encouraged a movement toward becoming data-driven. Although hailed as a solution to a plethora of challenges, the hype of Big Data, however, often oversees that data requires work – by humans. The emergent field of data work emphasizes these skilled but oft-invisible efforts required to make healthcare data-driven. Based on an ethnographic study, this project investigates data work in a healthcare business intelligence unit. The project’s purpose is to identify the skills and tasks that constitute data work within the unit, as well as how healthcare data work roles and tasks change in the process. In this paper, I present findings from my project: I first describe the collaborative work in constructing standardized and reliable data products that are applicable across multiple sites; I then describe the necessary work conducted to implement and disseminate data products in local healthcare practices. Finally, I summarize my next steps and expected contributions.
Geometric Baryogenesis from Shift Symmetry
Creators: name: De Simone, Andrea
name: Kobayashi, Takeshi
name: Liberati, Stefano
Publisher: name: arXiv
Year: 2016
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We present a new scenario for generating the baryon asymmetry of the universe that is induced by a Nambu-Goldstone (NG) boson. The shift symmetry naturally controls the operators in the theory, while allowing the NG boson to couple to the spacetime geometry as well as to the baryons. The cosmological background thus sources a coherent motion of the NG boson, which leads to baryogenesis. Good candidates of the baryon-generating NG boson are the QCD axion and axion-like fields. In these cases the axion induces baryogenesis in the early universe, and can also serve as dark matter in the late universe.
description: 6 pages, 1 figure; v2: published in PRL
Exact solutions and bounds for network SIR and SEIR models using a rooted-tree approximation
Creators: name: Hall, Cameron Luke
name: Siebert, Bram Alexander
Publisher: name: University of Limerick
Year: 2023
Subjects: subject: Health sciences
subject: FOS: Health sciences
subject: Biomedical and clinical sciences

description: In this paper, we develop a new node-based approximate model to describe contagion dynamics on networks. We prove that our approximate model is exact for Markovian SIR (susceptible-infectious-recovered) and SEIR (susceptible-exposed-infectious-recovered) dynamics on tree graphs with a single source of infection, and that the model otherwise gives upper bounds on the probabilities of each node being susceptible. Our analysis of SEIR contagion dynamics is general to SEIR models with arbitrarily many classes of exposed/latent state. In all cases of a tree graph with a single source of infection, our approach yields a system of linear differential equations that exactly describes the evolution of node-state probabilities; we use this to state explicit closed-form solutions for an SIR model on a tree. For more general networks, our approach yields a cooperative system of differential equations that can be used to bound the true solution.
title: EXPLORING LEARNING IN HYBRID WORK: A WAY FORWARD
Creators: name: Ebojoh, Sandra
Publisher: name: European Society for Socially Embedded Technologies (EUSSET)
Year: 2023

description: Hybrid work teams have recently gained popularity, with advances in digital technology and the pandemic problem, and are now essential for the new working world that has emerged since the outbreak. Consequently, workplace learning, which is crucial for employee development, has been affected, as the nature of work and the work environment is changing. There is therefore an urgent need for research on learning in the current hybrid work teams, as studies show that there is insufficient research on digital workplace learning, and businesses must adapt to this work model to survive. The focus of this study is to increase the understanding of the learning process in hybrid work. The study employs a qualitative research strategy with a multiple case study design with hybrid work teams. The data will be collected through in-depth interviews and focus groups with selected digitalized organizations. The study will contribute to the CSCW discourse by providing insights into the future of work teams, learning, and knowledge-sharing in such teams.
Quasirationality and prounipotent crossed modules
Creators: name: Mikhovich, Andrey
Publisher: name: arXiv
Year: 2017
Subjects: subject: Group Theory (math.GR)
subject: Algebraic Geometry (math.AG)
subject: Algebraic Topology (math.AT)
subject: FOS: Mathematics

description: Quasirational presentations ($QR$-presentations) of (pro-$p$)groups are studied. Such presentations include, in particular, aspherical presentations of discrete groups and their subpresentations and pro-$p$-groups with a single defining relation. Using schematization of $QR$-presentations we answer a variation of J.-P. Serre's question on one-relator pro-$p$-groups.
description: Text structure has been reorganized. Material on Melnikov's conjecture was singled out into a different article. Now in English, still a preliminary version any comments are wellcome
Equivalent Units of Production in Unit Cost Calculation for Fair Pricing of Pharmaceuticals : A Scoping Review
Creators: name: Udoh, Salem
name: Albu, Nadia
name: Popesko, Boris
name: Imran, Ali
Publisher: name: Zenodo
Year: 2022
Subjects: equivalent units of production
unit costs of pharmaceuticals
fair pricing of pharmaceuticals
scoping review

description: Unit cost of production based on management accounting convention is critical for an acceptable definition of fair pricing for pharmaceuticals.
title: The new public encounter: Where citizens meet the state-bot
Creators: name: Schmidt, Michaela
Publisher: name: European Society for Socially Embedded Technologies (EUSSET)
Year: 2023

description: This document gives an overview of the topic, research questions and current status of the authors PhD project. This research aims to investigate the impacts of digitalization of the interaction between state and public, also known as public encounter, on the citizens perception of their government. More specifically I want to find out whether the use of Information and Communication Technologies (ICTs) influences how the citizen perceives their government and if so whether it is possible to design these ICTs in a way that will foster a positive perception. The citizens perception of their government will be evaluated by assessing a given set of public service values. The goal is to develop a framework which can guide the design and implementation of digital public encounters in a way that contributes to a positive citizens perception of their government. The research focuses on the Norwegian context by investigating the nature of public encounters between government institutions and citizens.
title: Simulating Customer Lifetime Value: Implications for Game Design and Student Performance
Creators: name: Ledman (Ed.), Robert
Publisher: name: Universitätsbibliothek der Ludwig-Maximilians-Universität München
Year: 2005

description: Notwithstanding the emerging prominence of customer lifetime value (CLV) and customer equity in the marketing literature during the past decade, virtually nothing has been done to address these concepts in the literature on simulation and gaming. This paper addresses the failing, discussing the nature of CLV and customer equity, demonstrating how they might be incorporated into marketing simulations.
Very narrow excited $Ω_c$ baryons
Creators: name: Karliner, Marek
name: Rosner, Jonathan L.
Publisher: name: arXiv
Year: 2017
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: Recently LHCb reported the discovery of five extremely narrow excited $Ω_c$ baryons decaying into $Ξ_c^+ K^-$. We interpret these baryons as bound states of a $c$-quark and a $P$-wave $ss$-diquark. For such a system there are exactly five possible combinations of spin and orbital angular momentum. The narrowness of the states could be a signal that it is hard to pull apart the two $s$-quarks in a diquark. We predict two of spin 1/2, two of spin 3/2, and one of spin 5/2, all with negative parity. Of the five states two can decay in $S$-wave and three can decay in $D$-wave. Some of the $D$-wave states might be narrower than the $S$-wave states. We discuss relations among the five masses expected in the quark model and the likely spin assignments and compare with the data. A similar pattern is expected for negative-parity excited $Ω_b$ states. An alternative interpretation is noted in which the heaviest two states are $2S$ excitations with $J^P = 1/2^+$ and $3/2^+$, while the lightest three are those with $J^P = 3/2^-,3/2^-,5/2^-$ expected to decay via $D$-waves. In this case we expect $J^P = 1/2^-$ $Ω_c$ states around 2904 and 2978 MeV.
description: 18 pages, 4 figures (expanded text, appendices, and references)
Machine-Learning Assisted Optimization Strategies for Phase Change Materials Embedded within Electronic Packages
Creators: name: Bhatasana, Meghavin
name: Marconnet, Amy
Publisher: name: arXiv
Year: 2021
Subjects: subject: Computational Engineering, Finance, and Science (cs.CE)
subject: Emerging Technologies (cs.ET)
subject: Machine Learning (cs.LG)
subject: FOS: Computer and information sciences

description: Leveraging the latent heat of phase change materials (PCMs) can reduce the peak temperatures and transient variations in temperature in electronic devices. But as the power levels increase, the thermal conduction pathway from the heat source to the heat sink limits the effectiveness of these systems. In this work, we evaluate embedding the PCM within the silicon device layer of an electronic device to minimize the thermal resistance between the source and the PCM to minimize this thermal resistance and enhance the thermal performance of the device. The geometry and material properties of the embedded PCM regions are optimized using a combination of parametric and machine learning algorithms. For a fixed geometry, considering commercially available materials, Solder 174 significantly outperforms other organic and metallic PCMs. Also with a fixed geometry, the optimal melting points to minimize the peak temperature is higher than the optimal melting point to minimize the amplitude of the transient temperature oscillation, and both optima increase with increasing heater power. Extending beyond conventional optimization strategies, genetic algorithms and particle swarm optimization with and without neural network surrogate models are used to enable optimization of many geometric and material properties. For the test case evaluated, the optimized geometries and properties are similar between all ML-assisted algorithms, but the computational time depends on the technique. Ultimately, the optimized design with embedded phase change materials reduces the maximum temperature rise by 19% and the fluctuations by up to 88% compared to devices without PCM.
description: 13 pages, 8 figures, 7 tables
A complete effective field theory for dark matter
Creators: name: Criado, Juan Carlos
name: Djouadi, Abdelhak
name: Perez-Victoria, Manuel
name: Santiago, Jose
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We present an effective field theory describing the relevant interactions of the Standard Model with an electrically neutral particle that can account for the dark matter in the Universe. The possible mediators of these interactions are assumed to be heavy. The dark matter candidates that we consider have spin 0, 1/2 or 1, belong to an electroweak multiplet with arbitrary isospin and hypercharge and their stability at cosmological scales is guaranteed by imposing a $\mathbb{Z}_2$ symmetry. We present the most general framework for describing the interaction of the dark matter with standard particles, and construct a general non-redundant basis of the gauge-invariant operators up to dimension six. The basis includes multiplets with non-vanishing hypercharge, which can also be viable DM candidates. We give two examples illustrating the phenomenological use of such a general effective framework. First, we consider the case of a scalar singlet, provide convenient semi-analytical expressions for the relevant dark matter observables, use present experimental data to set constraints on the Wilson coefficients of the operators, and show how the interplay of different operators can open new allowed windows in the parameter space of the model. Then we study the case of a lepton isodoublet, which involves co-annihilation processes, and we discuss the impact of the operators on the particle mass splitting and direct detection cross sections. These examples highlight the importance of the contribution of the various non-renormalizable operators, which can even dominate over the gauge interactions in certain cases.
description: 38 pages, 4 figures, version published in JHEP, typos corrected
title: Knowledge and Expertise Sharing for Coordination in Digitalization Production Contexts
Creators: name: Sanchez Martin, Marcel Manuel
Publisher: name: European Society for Socially Embedded Technologies (EUSSET)
Year: 2023

description: In the process of ongoing digitalization of the production world, manufacturing companies are increasingly faced with the challenge of using new technologies to maintain their competitiveness. In this context, knowledge and expertise sharing is becoming more and more important, which may increase the requirements for articulation and coordination in cooperative settings. CSCW systems can potentially support these cooperation processes by promoting interaction between employees and supporting the formation of awareness. However, awareness can be related to factors of leadership and motivation and influence required learning processes through ongoing digitalization as well. As the use of CSCW systems affects technical, environmental and organizational factors of group work, knowledge and expertise sharing at different and between hierarchical levels also needs to be considered. Furthermore, group performance often is influenced by social forces and norms that act as group effects on group behavior. This is a qualitative research to explore the relationships of awareness, leadership, motivation, and learning processes and their influence on knowledge and expertise sharing in hierarchies, taking into account social processes in cooperative settings. The research focus is on small and medium-sized companies of the metalworking industry, which are in constant digitalization.
Thermoelectric properties of a strongly correlated layer
Creators: name: Titvinidze, Irakli
name: Dorda, Antonius
name: von der Linden, Wolfgang
name: Arrigoni, Enrico
Publisher: name: arXiv
Year: 2017
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: In this paper we investigate the effect of strong electronic interactions on the thermoelectric properties of a simple generic system, consisting of a single correlated layer sandwiched between two metallic leads. Results will be given for the linear response regime as well as beyond, for which a full nonequilibrium many-body calculation is performed, based on nonequilibrium dynamical mean-field theory (DMFT). As impurity solver we use the auxiliary master equation approach, which addresses the impurity problem within a finite auxiliary system consisting of a correlated impurity, a small number of uncorrelated bath sites and Markovian environments. For the linear response regime, results will be presented for the Seebeck coefficient, the electrical conductance and the electronic contribution to the thermal conductance. Beyond linear response, i.e. for finite differences in the temperatures and/or the bias voltages in the leads, we study the dependence of the current on various model parameters, such as gate voltage and Hubbard interaction of the central layer. We will give a detailed parameter study as far as the thermoelectric efficiency is concerned. We find that strong correlations can indeed increase the thermopower of the device. In addition, some general theoretical requirements for an efficient thermoelectric device will be given.
description: 12 pages, 10 figures
historical and archaeological significance of the Bohai cultural layers at the site of Utesnoe-4
Creators: name: Kim, Alexander Alexeevich
name: Burdonov, Andrei Victorovich
name: Mezentsev, Alexander Leonidovich
Publisher: name: Zeitschrift für Archäologie Außereuropäischer Kulturen
Year: 2023

description: The site of Utesnoe-4 is located in the Primorye region, near the village of Utesnoe (district of Ussuriysk), in the southern part of the Russian Far East. It is a stratifi ed site with archaeological artefacts ranging from the Krounovka culture to the Jurchen period. More than 200 Bohai and Jurchen sites are located in the Primorye region; however, it is only at Utesnoe-4 that Mohe, Bohai and Jurchen artefacts are found on the same site and this provides the opportunity to analyse them in a different way. Despite the fact that Russian archaeologists have excavated Utesnoe-4 for only two fi eld seasons, materials from this site have the potential to contribute important information to the history and archaeology of the region. The aim of this article is to present the analysis of the assemblages from Utesnoe-4 and consider the historical signifi cance of this site and neighbouring areas.
description: Zeitschrift für Archäologie Außereuropäischer Kulturen, Bd. 7 (2017): Zeitschrift für Archäologie Außereuropäischer Kulturen
Erste Ergebnisse der Grabungen des Jahres 2013 in Karabalgasun und Karakorum / Mongolei
Creators: name: Franken, Christina
name: Erdenebat, Ulambayar
name: Batbayar, Tumurochir
Publisher: name: Zeitschrift für Archäologie Außereuropäischer Kulturen
Year: 2023

description: Der Artikel wird zeitnah als PDF verfügbar sein.
description: Zeitschrift für Archäologie Außereuropäischer Kulturen, Bd. 6 (2014): Zeitschrift für Archäologie Außereuropäischer Kulturen
title: Risikokulturen bei der Nutzung Sozialer Medien in Katastrophenlagen
Creators: name: Reuter, Christian
name: Kaufhold, Marc-André
name: Schmid, Stefka
Publisher: name: Bundesamt für Bevölkerungsschutz und Katastrophenhilfe
Year: 2023

description: Soziale Medien werden auf der ganzen Welt genutzt. Vergleicht man die allgemeine Nutzung sozialer Medien im Vereinigten Königreich (GB), Deutschland (DE), den Niederlanden (NL) und Italien (IT), zeigt sich, dass sie in Italien am wenigsten in Anspruch genommen werden. Dort sind knapp 40 % der Bevölkerung, d. h. 37 Millionen Menschen, in den sozialen Medien aktiv. Sowohl im Vereinigtem Königreich (59 %, 39 Mio.), Deutschland (55 %, 45 Mio.) als auch den Niederlanden (57 %, 9,74 Mio.) lassen sich ähnliche Tendenzen erkennen. Angesichts der Tatsache, dass mobile Endgeräte, die tendenziell immer griffbereit sind, sehr häufig zur Kommunikation über soziale Medien eingesetzt werden, ist es nicht verwunderlich, dass diese auch in Notsituationen genutzt werden [8]. Bis dato fehlt es an aussagekräftigen quantitativen und vergleichbaren Ergebnissen aus unterschiedlichen Ländern über die Wahrnehmung der Bevölkerung zur Nutzung von sozialen Medien in Notsituationen. Die im Folgenden vorgestellte Studie „The Impact of Risk Cultures: Citizens’ Perception of Social Media Use in Emergencies across Europe” [9] mit Beteiligung der TU Darmstadt, Universität Siegen und dem Tavistock Institute (London), möchte das bestehende Defizit adressieren. Anhand der repräsentativen Umfrageergebnisse werden zunächst vier europäische Länder präsentiert und dann miteinander verglichen. Ziel ist es, Ähnlichkeiten und Unterschiede in der Nutzung sozialer Medien in Notsituationen zu erfassen. Frühere Forschungsergebnisse haben im Hinblick auf Katastrophen gezeigt, dass es unterschiedliche Risikokulturen in europäischen Ländern gibt, die das Verhalten der Bevölkerung jeweils unterschiedlich beeinflussen und prägen (vgl. [4]; [5]).
Die Petrographie keramischer Grabbeigaben und Steinwerkzeuge aus der Deltaebene des Mekong
Creators: name: Behrendt, Thorsten
name: Reinecke, Andreas
Publisher: name: Zeitschrift für Archäologie Außereuropäischer Kulturen
Year: 2023

description: Der Artikel wird zeitnah als PDF verfügbar sein.
description: Zeitschrift für Archäologie Außereuropäischer Kulturen, Bd. 6 (2014): Zeitschrift für Archäologie Außereuropäischer Kulturen
title: Synthesis and characterisation of cerium based nanocomposites
Creators: name: Wilson, Bradley
Publisher: name: University of Glasgow
Year: 2022

description: This thesis presents the novel, solution based, single step methodology of reactive infiltration (RI) as a way of synthesising cerium based nanoparticles (CeNP) inside metal organic framework (MOF) structures. Through the complementary precursor-host pairing, the highly basic CeN''3 precursor reacts spontaneous within the protic MOF808 host structure, yielding the composite: CeNP@MOF808. The CeNP@MOF808 was fully characterised using a number of spectroscopic techniques, demonstrating that the structural integrity of the MOF808 host remains unchanged following the RI process, specifically the crystalline arrange and high surface area of MOF808 are retained. A combination of XAS, XPS and EELS spectroscopies demonstrated that the CeNP@MOF808 composite consists of both Ce3+ and Ce4+ oxidation states, in a 3:1 respectively, with a surface Ce ions all existing in the 3+ state. Post-synthetic modifications, thermal and oxidative, of CeNP@MOF808 are presented, along with spectroscopic characterisation of the physio-electronic properties of the modified composites. A notable link between the microstructure of the composite and electronic Ce3+:Ce4+ structure is observed whereby thermal and oxidative post-synthetic modifications that resulted in the loss of MOF808 crystalline arrangement exhibited a concurrent reduction in the Ce3+ proportions. Given the redox active nature of the Ce3+:Ce4+ couple, the CeNP@MOF808 composite was screened as a possible catalyst for the decomposition of the nerve agent simulant dimethyl p-nitrophenylphosphate (DMNP). Through an standard optimised methodology it was demonstrated that the CeNP@MOF808 composite exhibited improve catalytic activity towards the hydrolysis of DMNP, relative to the control MOF808 host structure. The synthesis and characterisation of lanthanide β-ketoiminate complexes Y{OC(Me)CHC(Me)Ni Pr}3 (1) and Ce2{OC(Me)CHC(Me)Ni Pr}6 (2) was reported. Compound 2 is investigated as a possible broad spectrum precursor in the synthesis of CeO2 based nanomaterials through thermal decomposition and RI with MOF808.
Forschungen in Ifri n’Ammar und ihrem Umfeld
Creators: name: Eiwanger, Josef
name: Tomasso, Sonja
Publisher: name: Zeitschrift für Archäologie Außereuropäischer Kulturen
Year: 2023

description: Der Artikel wird zeitnah als PDF verfügbar sein.
description: Zeitschrift für Archäologie Außereuropäischer Kulturen, Bd. 6 (2014): Zeitschrift für Archäologie Außereuropäischer Kulturen
Effective field theory approach to the gravitational two-body dynamics, at fourth post-Newtonian order and quintic in the Newton constant
Creators: name: Foffa, Stefano
name: Mastrolia, Pierpaolo
name: Sturani, Riccardo
name: Sturm, Christian
Publisher: name: arXiv
Year: 2016
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: Working within the post-Newtonian (PN) approximation to General Relativity, we use the effective field theory (EFT) framework to study the conservative dynamics of the two-body motion at fourth PN order, at fifth order in the Newton constant. This is one of the missing pieces preventing the computation of the full Lagrangian at fourth PN order using EFT methods. We exploit the analogy between diagrams in the EFT gravitational theory and 2-point functions in massless gauge theory, to address the calculation of 4-loop amplitudes by means of standard multi-loop diagrammatic techniques. For those terms which can be directly compared, our result confirms the findings of previous studies, performed using different methods.
description: Version accepted for publication in Phys. Rev. D. Appendix C added with details of amplitude computations
frühen Siedler von Jasiaquiri (Bolivien)
Creators: name: Prümers, Heiko
name: Betancourt, Carla Jaimes
Publisher: name: Zeitschrift für Archäologie Außereuropäischer Kulturen
Year: 2023

description: Der Artikel wird zeitnah als PDF verfügbar sein.
description: Zeitschrift für Archäologie Außereuropäischer Kulturen, Bd. 6 (2014): Zeitschrift für Archäologie Außereuropäischer Kulturen