cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Capturing Dependencies within Machine Learning via a Formal Process Model
Creators: name: Ritz, Fabian
name: Phan, Thomy
name: Sedlmeier, Andreas
name: Altmann, Philipp
name: Wieghardt, Jan
name: Schmid, Reiner
name: Sauer, Horst
name: Klein, Cornel
name: Linnhoff-Popien, Claudia
name: Gabor, Thomas
Publisher: name: arXiv
Year: 2022
Subjects: subject: Software Engineering (cs.SE)
subject: Machine Learning (cs.LG)
subject: FOS: Computer and information sciences

description: The development of Machine Learning (ML) models is more than just a special case of software development (SD): ML models acquire properties and fulfill requirements even without direct human interaction in a seemingly uncontrollable manner. Nonetheless, the underlying processes can be described in a formal way. We define a comprehensive SD process model for ML that encompasses most tasks and artifacts described in the literature in a consistent way. In addition to the production of the necessary artifacts, we also focus on generating and validating fitting descriptions in the form of specifications. We stress the importance of further evolving the ML model throughout its life-cycle even after initial training and testing. Thus, we provide various interaction points with standard SD processes in which ML often is an encapsulated task. Further, our SD process model allows to formulate ML as a (meta-) optimization problem. If automated rigorously, it can be used to realize self-adaptive autonomous systems. Finally, our SD process model features a description of time that allows to reason about the progress within ML development processes. This might lead to further applications of formal methods within the field of ML.
description: 10 pages, 5 figures, draft; the final version will appear in the proceedings of the International Symposium on Leveraging Applications of Formal Methods (ISoLA) 2022
Automatic detection of access control vulnerabilities via API specification processing
Creators: name: Barabanov, Alexander
name: Dergunov, Denis
name: Makrushin, Denis
name: Teplov, Aleksey
Publisher: name: arXiv
Year: 2022
Subjects: subject: Cryptography and Security (cs.CR)
subject: FOS: Computer and information sciences

description: Objective. Insecure Direct Object Reference (IDOR) or Broken Object Level Authorization (BOLA) are one of the critical type of access control vulnerabilities for modern applications. As a result, an attacker can bypass authorization checks leading to information leakage, account takeover. Our main research goal was to help an application security architect to optimize security design and testing process by giving an algorithm and tool that allows to automatically analyze system API specifications and generate list of possible vulnerabilities and attack vector ready to be used as security non-functional requirements. Method. We conducted a multivocal review of research and conference papers, bug bounty program reports and other grey sources of literature to outline patterns of attacks against IDOR vulnerability. These attacks are collected in groups proceeding with further analysis common attributes between these groups and what features compose the group. Endpoint properties and attack techniques comprise a group of attacks. Mapping between group features and existing OpenAPI specifications is performed to implement a tool for automatic discovery of potentially vulnerable endpoints. Results and practical relevance. In this work, we provide systematization of IDOR/BOLA attack techniques based on literature review, real cases analysis and derive IDOR/BOLA attack groups. We proposed an approach to describe IDOR/BOLA attacks based on OpenAPI specifications properties. We develop an algorithm of potential IDOR/BOLA vulnerabilities detection based on OpenAPI specification processing. We implemented our novel algorithm using Python and evaluated it. The results show that algorithm is resilient and can be used in practice to detect potential IDOR/BOLA vulnerabilities.
title: Благоустройство дворовой территории в северном районе города Великий Новгород
Creators: name: Фильканова, Елена
name: Ивченко, Татьяна
Publisher: name: Новгородский государственный университет имени Ярослава Мудрого (НовГУ)
Year: 2021

description: В данной статье представлен проект благоустройства дворовой территории для жилого комплекса из четырех домов. В качестве предпроектного исследования были выполнены ситуационная схема, схема исходной ситуации, схема организации пластики рельефа и концептуальное предложение. Было выявлено, что основными особенностями участка являются отсутствие единого пространства для всех домов, близость к воде и активный рельеф на востоке участка. Проектное решение включает в себя разбивочный чертёж, генплан, план дорожных покрытий, дендрологический план, чертёж фрагмента. Представлено удобное и функциональное дворовое пространство из природных и современных материалов, основанное на особенностях данной территории.
Multi-stage Stern-Gerlach experiment modeled (with additional appendices)
Creators: name: Wang, Lihong V.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Quantum Physics (quant-ph)
subject: Atomic Physics (physics.atom-ph)
subject: FOS: Physical sciences

description: In the classic multi-stage Stern$-$Gerlach experiment conducted by Frisch and Segrè, the Majorana (Landau$-$Zener) and Rabi formulae diverge afar from the experimental observation while the physical mechanism for electron-spin collapse remains unidentified. Here, introducing the physical co-quantum concept provides a plausible physical mechanism and predicts the experimental observation in absolute units without fitting (i.e., no parameters adjusted) with a p-value less than one per million, which is the probability that the co-quantum theory happens to match the experimental observation purely by chance. Further, the co-quantum concept is corroborated by statistically reproducing exactly the wave function, density operator, and uncertainty relation for electron spin in Stern$-$Gerlach experiments.
Rindler-type geometry inside a black hole
Creators: name: Culetu, Hristu
Publisher: name: arXiv
Year: 2011
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: An anisotropic fluid with positive energy density and negative pressures is proposed in the black hole interior. The gravitational field is constant everywhere inside and is given by the horizon surface gravity. Even though the geometry is of Rindler type it is curved because of the spherical symmetry used and is singular at the origin. The Israel junction conditions are studied on the stretched horizon instead of using a matching process on the null surface $r = 2M$. The entropy of any inner sphere is mass independent, maximally packed and unaffected by the outer layers.
description: 10 pages, article in press in Phys. Lett. A (2012), http://dx.doi.org/10.1016/j.physleta.2012.08.008
Karate and Dance Training to Improve Balance and Stabilize Mood in Patients with Parkinson’s Disease: A Feasibility Study
Creators: name: Dahmen-Zimmer, Katharina
name: Jansen, Petra
Publisher: name: Universität Regensburg
Year: 2017
Subjects: subject: Parkinson, karate, line dance, standard dance, cognitive function, motor functions, emotional well-being
subject: 150 Psychologie

description: The present pilot study investigated the effect of karate (according to the rules of the German Karate Federation) and dance training compared to an inactive control group in patients with Parkinson’s disease (PD). 65 patients were recruited. At the end, 37 patients completed the post-test. From those 37 patients, 16 had chosen the karate training, 9 the dance training and 12 the waiting control group. Before and after the whole training phase cognitive performance, emotional well-being and balance were measured. The results showed that both, karate and dance training groups, improved balance. Furthermore, the mood dropped only in the waiting control group receiving no training at all, whereas it remained stable in patients who attended the karate and dance group. The training adherence was higher in the karate than the dance group indicating a high acceptability in PD patients for karate. In sum, karate can have the same positive effects as dance for PD patients. Further studies with larger samples and more rigorous methodologies are required to investigate the reported effects in more detail.
Lachen und Weinen mit ungebetenen Gästen : Kulturelle Grenzüberschreitungen in Abbas Khiders Ohrfeige und Firas Alshaters Ich komm auf Deutschland zu
Creators: name: Zimmermann, Sabine
Publisher: name: University of British Columbia
Year: 2017

description: This study investigates literary representations of refugees in contemporary German literature. Specifically, it analyzes the autobiography Ich komm auf Deutschland zu (2016) written by a Syrian refugee, Firas Alshater, who arrived in Germany in 2013, and the auto-fictional novel Ohrfeige (2016) by the German-Iraqi author Abbas Khider, who sought asylum in Germany in 2000. Both authors write from a transcultural point of view which challenges the definition of German culture and its ostensible dividing lines. As refugees themselves, these transnational authors have created works that interact aesthetically with contemporary German and European asylum and migration law, while vividly portraying the affective aspects of flight, trauma, and resettlement for those who manage to reach Germany. Both authors make use of irony, satire, and parody, which turn their works into aesthetic interventions that bring together social and political debates surrounding the topic of refugees in modern Germany. Each oeuvre defies the representation of refugees as victims and cultural outsiders. The texts expose ways in which fear and anxiety construct images of refugees as threatening and by which they are relegated to the margins of society. Through Alshaters and Khiders work, readers may question the imagined boundaries of the nation-state and reconsider notions of belonging. The humor embedded in their writing teases out tensions, contradictions, and resonances across time and space. Particularly, the persistent desire to look to ethnicity as a presumed guarantor of Germany’s collective self is challenged. Alshater’s humoristic-ironic style as well as his application of allusion and imagery and Khider’s employment of parody expose national and cultural ambiguity. By humanizing the term “ethnicity,” which is primarily viewed as a public identity, the authors stress the inclusion of a personal component, pointing to a common human need for recognition. Readers of these two works are invited to untether themselves from a singular national focus and instead view Germany as a dynamic imagined community - a moveable construct that will continue to evolve as events that occur in one place of the world do not stay contained within borders of nation states drawn on maps.
title: "Ara con fronde di edera e nastri a rilievo", arte romana, inv. CVII (ITA/EN)
title: Scheda catalogo digitale Borghese
titleType: AlternativeTitle
Creators: name: Ciccarello, Giulia
name: Galleria Borghese
Publisher: name: Galleria Borghese
Year: 2024

description: Pubblicazione delle schede delle opere conservate nel museo ed estratte dal catalogo digitale di

Galleria Borghese, nelle due versioni esistenti online, in italiano e inglese.

Collegamento al catalogo digitale:

ITA: https://www.collezionegalleriaborghese.it/

EN: https://www.collezionegalleriaborghese.it/en
The Role of Group Size and Correlated Project Outcomes in Group Lending
Creators: name: Markheim, Marina
Publisher: name: Universität Regensburg
Year: 2017
Subjects: subject: Microfinance, Group Lending, Strategic Default, Group Size, Correlated Credit Risk
subject: 330 Wirtschaft

description: This paper analyzes contract efficiency with regard to correlated project realization and the size of the borrowers in group lending. Firstly, I show that under the standard assumption of independent project payoffs, the expected group cost of default decreases with group size. Secondly, I show that small groups can also optimize group efficiency if individual payoffs and credit risks are correlated. The results outline that social cost minimization occurs due to a common interest in forming optimal borrower groups between lenders and borrowers.
Which Updates During an Equity Crowdfunding Campaign Increase Crowd Participation?
Creators: name: Block, Jörn
name: Hornuf, Lars
name: Moritz, Alexandra
Publisher: name: Universität Regensburg
Year: 2018
Subjects: subject: Crowdfunding, Entrepreneurial finance, Updates, Investor communication
subject: 330 Wirtschaft

description: Start-ups often post updates during equity crowdfunding campaigns. However, little is known about the effects of such updates on crowd participation. We investigate this question by using hand-collected data from 71 funding campaigns and 39,399 investment decisions on two German equity crowdfunding portals. Using a combination of different empirical research techniques, we find that posting an update has a significant positive effect on the number of investments made by the crowd and the investment amount collected by the start-up. This effect does not occur immediately in its entirety; rather, it lags the update by a few days. Furthermore, the effect of updates loses statistical significance with the number of updates posted during a campaign. We also find that an easier language used in updates increases crowd participation, whereas the length of updates has no effects. With respect to the update’s content, we find that the positive effect can be attributed to updates about new developments of the start-up such as campaign developments, new funding, business developments, and cooperation projects. Updates on the start-up team, business model, product developments, and promotional campaigns do not have meaningful effects. Our paper contributes to the literature on the effects of information disclosure on equity crowdfunding participation. Furthermore, our results have practical implications for start-ups and their investor communication during equity crowdfunding campaigns.
description: Published online: 24 May 2017
Pfaffian formulae for one dimensional coalescing and annihilating systems
Creators: name: Tribe, Roger
name: Zaboronski, Oleg
Publisher: name: arXiv
Year: 2010
Subjects: subject: Probability (math.PR)
subject: Mathematical Physics (math-ph)
subject: FOS: Mathematics
subject: FOS: Physical sciences

description: The paper considers instantly coalescing, or instantly annihilating, systems of one-dimensional Brownian particles on the real line. Under maximal entrance laws, the distribution of the particles at a fixed time is shown to be Pfaffian point processes closely related to the Pfaffian point process describing one dimensional distribution of real eigenvalues in the real Ginibre ensemble of random matrices. As an application, an exact large time asymptotic for the n-point density function for coalescing particles is derived.
description: 26 pages, no figures. Final version: connection between one-dimensional distributions of annihilating Brownian motions and real eigenvalues in real Ginibre ensemble spotted by the referee is stated explicitly. Conjecture relating the eigenvalue processes to annihilating Brownian motions is stated. References added
One dimensional reduced model for ITER relevant energetic particle transport
Creators: name: Carlevaro, Nakia
name: Meng, Guo
name: Montani, Giovanni
name: Zonca, Fulvio
name: Hayward-Schneider, Thomas
name: Lauber, Philipp
name: Lu, Zhixin
name: Wang, Xin
Publisher: name: arXiv
Year: 2022
Subjects: subject: Plasma Physics (physics.plasm-ph)
subject: FOS: Physical sciences

description: We set up a mapping procedure able to translate the evolution of the radial profile of fast ions, interacting with Toroidal Alfvén Eigenmodes, into the dynamics of an equivalent one dimensional bump-on-tail system. We apply this mapping technique to reproduce ITER relevant simulations, which clearly outlined deviations from the diffusive quasi-linear (QL) model. Our analysis demonstrates the capability of the one-dimensional beam-plasma dynamics to predict the relevant features of the non-linear hybrid LIGKA/HAGIS simulations. In particular, we clearly identify how the deviation from the QL evolutive profiles is due to the presence of avalanche processes. A detailed analysis regarding the reduced dimensionality is also addressed, by means of phase-space slicing based on constants of motion. In the conclusions, we outline the main criticalities and outcomes of the procedure, which must be satisfactorily addressed to make quantitative prediction on the observed outgoing fluxes in a Tokamak device.
description: 14 pages, 14 figures
Magnetic Misalignment of Interstellar Dust Filaments
Creators: name: Cukierman, Ari J.
name: Clark, S. E.
name: Halal, George
Publisher: name: arXiv
Year: 2022
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: We present evidence for scale-independent misalignment of interstellar dust filaments and magnetic fields. We estimate the misalignment by comparing millimeter-wave dust-polarization measurements from Planck with filamentary structures identified in neutral-hydrogen (HI) measurements from HI4PI. We find that the misalignment angle displays a scale independence (harmonic coherence) for features larger than the HI4PI beam width ($16.2'$). We additionally find a spatial coherence on angular scales of $\mathcal{O}(1^\circ)$. We present several misalignment estimators formed from the auto- and cross-spectra of dust-polarization and HI-based maps, and we also introduce a map-space estimator. Applied to large regions of the high-Galactic-latitude sky, we find a global misalignment angle of $\sim 2^\circ$, which is robust to a variety of masking choices. By dividing the sky into small regions, we show that the misalignment angle correlates with the parity-violating $TB$ cross-spectrum measured in the Planck dust maps. The misalignment paradigm also predicts a dust $EB$ signal, which is of relevance in the search for cosmic birefringence but as yet undetected; the measurements of $EB$ are noisier than of $TB$, and our correlations of $EB$ with misalignment angle are found to be weaker and less robust to masking choices. We also introduce an HI-based dust-polarization template constructed from the Hessian matrix of the HI intensity, which is found to correlate more strongly than previous templates with Planck dust $B$ modes.
description: 31 pages, 18 figures
Social Fear Conditioning Paradigm in Virtual Reality: Social vs. Electrical Aversive Conditioning.
Creators: name: Reichenberger, Jonas
name: Porsch, Sonja
name: Wittmann, Jasmin
name: Zimmermann, Verena
name: Shiban, Youssef
Publisher: name: Universität Regensburg
Year: 2017
Subjects: subject: social fear conditioning, virtual reality, fear-potentiated startle, skin conductance level, avoidance behavior
subject: 150 Psychologie

description: In a previous study we could show that social fear can be induced and extinguished using virtual reality (VR). In the present study, we aimed to investigate the belongingness effect in an operant social fear conditioning (SFC) paradigm which consisted of an acquisition and an extinction phase. Forty-three participants used a joystick to approach different virtual male agents that served as conditioned stimuli. Participants were randomly allocated to one of two experimental conditions. In the electroshock condition, the unconditioned stimulus (US) used during acquisition was an electric stimulation. In the social threat condition, the US consisted of an offense: a spit in the face, mimicked by a sound and a weak air blast to the participant’s neck combined with an insult. In both groups the US was presented when participants were close to the agent (75% contingency for CS+). Outcome variables included subjective, psychophysiological and behavioral data. As expected, fear and contingency ratings increased significantly during acquisition and the differentiation between CS+ and CS- vanished during extinction. Furthermore, a clear difference in skin conductance between CS+ and CS- at the beginning of the acquisition indicated that SFC had been successful. However, a fast habituation to the US was found toward the end of the acquisition phase for the physiological response. Furthermore, participants showed avoidance behavior toward CS+ in both conditions. The results show that social fear can successfully be induced and extinguished in VR in a human sample. Thus, our paradigm can help to gain insight into learning and unlearning of social fear. Regarding the belongingness effect, the social threat condition benefits from a better differentiation between the aversive and the non-aversive stimuli. As next step we suggest comparing social-phobic patients to healthy controls in order to investigate possible differences in discrimination learning and to foster the development of more efficient treatments for social phobia.
Computational power of one-dimensional symmetry-protected topological phases
Creators: name: Stephen, David Thomas
Publisher: name: University of British Columbia
Year: 2017

description: We consider ground states of quantum spin chains with symmetry-protected topological (SPT) order as resources for measurement-based quantum computation (MBQC). Using tensor network methods, we show that SPT phases protected by a finite abelian on-site symmetry group exhibit uniform computational power. That is, any state from a given phase leads to the same Lie group of executable gates when used as a resource for MBQC. This Lie group is determined by the same algebraic information that labels the SPT phase itself, and we give a necessary condition on the phase that guarantees a full set of single-qubit gates. To obtain our results, we construct several new techniques in MBQC and refine the structure of quantum states with abelian SPT order. Our results are analogous to similar results relating topological order and topological quantum computation, and we comments on their implications on the general connection between quantum phases of matter and quantum computation.
Pricing Shares in Equity Crowdfunding
Creators: name: Hornuf, Lars
name: Neuenkirch, Matthias
Publisher: name: Universität Regensburg
Year: 2017
Subjects: subject: Auctions, Equity crowdfunding, Valuation of shares
subject: 330 Wirtschaft

description: We analyze the pricing of cash flow rights in start-up companies using a unique data set of 44 equity crowdfunding campaigns. Our sample consists of 499 backers who invested during the period from November 6, 2011, to March 25, 2014, on the German equity crowdfunding portal Innovestment. In contrast with all other European equity crowdfunding portals, Innovestment runs a multi-unit second-price auction in which backers themselves can specify the price of an investment ticket. We exploit this unique auction mechanism to analyze backers’ willingness to pay for cash flow rights. We find that campaign characteristics, investor sophistication, progress in funding, herding, and stock market volatility influence backers’ willingness to pay in an economically meaningful manner, while geographic distance, learning effects, and sniping at the end of an auction have no effect.
description: First Online: 25 October 2016
Long-term memory updating: The reset-of-encoding hypothesis in list-method directed forgetting
Creators: name: Pastötter, Bernhard
name: Tempel, Tobias
name: Bäuml, Karl-Heinz T.
Publisher: name: Universität Regensburg
Year: 2017
Subjects: subject: 150 Psychologie

description: People’s memory for new information can be enhanced by cuing them to forget older information, as is shown in list-method directed forgetting (LMDF). In this task, people are cued to forget a previously studied list of items (list 1) and to learn a new list of items (list 2) instead. Such cuing typically enhances memory for the list 2 items and reduces memory for the list 1 items, which reflects effective long-term memory updating. This review focuses on the reset-of-encoding (ROE) hypothesis as a theoretical explanation of the list 2 enhancement effect in LMDF. The ROE hypothesis is based on the finding that encoding efficacy typically decreases with number of encoded items and assumes that providing a forget cue after study of some items (e.g., list 1) resets the encoding process and makes encoding of subsequent items (e.g., early list 2 items) as effective as encoding of previously studied (e.g., early list 1) items. The review provides an overview of current evidence for the ROE hypothesis. The evidence arose from recent behavioral, neuroscientific, and modeling studies that examined LMDF on both an item and a list level basis. The findings support the view that ROE plays a critical role for the list 2 enhancement effect in LMDF. Alternative explanations of the effect and the generalizability of ROE to other experimental tasks are discussed.
Ergodic Mean-Field Games with aggregation of Choquard-type
Creators: name: Bernardini, Chiara
name: Cesaroni, Annalisa
Publisher: name: arXiv
Year: 2022
Subjects: subject: Analysis of PDEs (math.AP)
subject: FOS: Mathematics
subject: 35J47, 35B33, 49N70, 35Q55

description: We consider second-order ergodic Mean-Field Games systems in the whole space $\mathbb{R}^N$ with coercive potential and aggregating nonlocal coupling, defined in terms of a Riesz interaction kernel. These MFG systems describe Nash equilibria of games with a large population of indistinguishable rational players attracted toward regions where the population is highly distributed. Equilibria solve a system of PDEs where an Hamilton-Jacobi-Bellman equation is combined with a Kolmogorov-Fokker-Planck equation for the mass distribution. Due to the interplay between the strength of the attractive term and the behavior of the diffusive part, we will obtain three different regimes for the existence and non existence of classical solutions to the MFG system. By means of a Pohozaev-type identity, we prove nonexistence of regular solutions to the MFG system without potential in the Hardy-Littlewood-Sobolev-supercritical regime. On the other hand, using a fixed point argument, we show existence of classical solutions in the Hardy-Littlewood-Sobolev-subcritical regime at least for masses smaller than a given threshold value. In the mass-subcritical regime we show that actually this threshold can be taken to be $+\infty$.
CAST search for sub-eV mass solar axions with 3He buffer gas
Creators: name: Arik, M.
name: Aune, S.
name: Barth, K.
name: Belov, A.
name: Borghi, S.
name: Bräuninger, H.
name: Cantatore, G.
name: Carmona, J. M.
name: Cetin, S. A.
name: Collar, J. I.
name: Dafni, T.
name: Davenport, M.
name: Eleftheriadis, C.
name: Elias, N.
name: Ezer, C.
name: Fanourakis, G.
name: Ferrer-Ribas, E.
name: Friedrich, P.
name: Galán, J.
name: García, J. A.
name: Gardikiotis, A.
name: Gazis, E. N.
name: Geralis, T.
name: Giomataris, I.
name: Gninenko, S.
name: Gómez, H.
name: Gruber, E.
name: Guthörl, T.
name: Hartmann, R.
name: Haug, F.
name: Hasinoff, M. D.
name: Hoffmann, D. H. H.
name: Iguaz, F. J.
name: Irastorza, I. G.
name: Jacoby, J.
name: Jakovčić, K.
name: Karuza, M.
name: Königsmann, K.
name: Kotthaus, R.
name: Krčmar, M.
name: Kuster, M.
name: Lakić, B.
name: Laurent, J. M.
name: Liolios, A.
name: Ljubičić, A.
name: Lozza, V.
name: Lutz, G.
name: Luzón, G.
name: Morales, J.
name: Niinikoski, T.
name: Nordt, A.
name: Papaevangelou, T.
name: Pivovaroff, M. J.
name: Raffelt, G.
name: Rashba, T.
name: Riege, H.
name: Rodríguez, A.
name: Rosu, M.
name: Ruz, J.
name: Savvidis, I.
name: Silva, P. S.
name: Solanki, S. K.
name: Stewart, L.
name: Tomás, A.
name: Tsagri, M.
name: van Bibber, K.
name: Vafeiadis, T.
name: Villar, J.
name: Vogel, J. K.
name: Yildiz, S. C.
name: Zioutas, K.
Publisher: name: arXiv
Year: 2011
Subjects: subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: The CERN Axion Solar Telescope (CAST) has extended its search for solar axions by using 3He as a buffer gas. At T=1.8 K this allows for larger pressure settings and hence sensitivity to higher axion masses than our previous measurements with 4He. With about 1 h of data taking at each of 252 different pressure settings we have scanned the axion mass range 0.39 eV < m_a < 0.64 eV. From the absence of excess X-rays when the magnet was pointing to the Sun we set a typical upper limit on the axion-photon coupling of g_ag < 2.3 x 10^{-10} GeV^{-1} at 95% CL, the exact value depending on the pressure setting. KSVZ axions are excluded at the upper end of our mass range, the first time ever for any solar axion search. In future we will extend our search to m_a < 1.15 eV, comfortably overlapping with cosmological hot dark matter bounds.
description: 5 pages, 2 figures, updated author list, revised arguments, results unchanged
A functional generalization of the field-theoretical renormalization group approach for the single-impurity Anderson model
Creators: name: Freire, Hermann
name: Corrêa, Eberth
Publisher: name: arXiv
Year: 2010
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We apply a functional implementation of the field-theoretical renormalization group (RG) method up to two loops to the single-impurity Anderson model. To achieve this, we follow a RG strategy similar to that proposed by Vojta \emph{et al.} [Phys. Rev. Lett. \textbf{85}, 4940 (2000)], which consists of defining a soft ultraviolet regulator in the space of Matsubara frequencies for the renormalized Green's function. Then we proceed to derive analytically and solve numerically integro-differential flow equations for the effective couplings and the quasiparticle weight of the present model, which fully treat the interplay of particle-particle and particle-hole parquet diagrams and the effect of the two-loop self-energy feedback into them. We show that our results correctly reproduce accurate numerical renormalization group data for weak to slightly moderate interactions. These results are in excellent agreement with other functional Wilsonian RG works available in the literature. Since the field-theoretical RG method turns out to be easier to implement at higher loops than the Wilsonian approach, higher-order calculations within the present approach could improve further the results for this model at stronger couplings. We argue that the present RG scheme could thus offer a possible alternative to other functional RG methods to describe electronic correlations within this model.
description: Revised version; title changed, references added. Accepted for publication in Journal of Low Temperature Physics
Silicon dry oxidation kinetics at low temperature in the nanometric range: Modeling and experiment
Creators: name: Krzeminski, Christophe
name: Larrieu, Guilhem
name: Penaud, Julien
name: Lampin, Evelyne
name: Dubois, Emmanuel
Publisher: name: arXiv
Year: 2011
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: Computational Physics (physics.comp-ph)
subject: FOS: Physical sciences

description: Kinetics of silicon dry oxidation are investigated theoretically and experimentally at low temperature in the nanometer range where the limits of the Deal and Grove model becomes critical. Based on a fine control of the oxidation process conditions, experiments allow the investigation of the growth kinetics of nanometric oxide layer. The theoretical model is formulated using a reaction rate approach. In this framework, the oxide thickness is estimated with the evolution of the various species during the reaction. Standard oxidation models and the reaction rate approach are confronted with these experiments. The interest of the reaction rate approach to improve silicon oxidation modeling in the nanometer range is clearly demonstrated.
Electron-Phonon Decoupling in Two Dimensions
Creators: name: McArdle, George
name: Lerner, Igor V.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: In order to observe many-body localisation in electronic systems, decoupling from the lattice phonons is required, which is possible only in out-of-equilibrium systems. We show that such an electron-phonon decoupling may happen in suspended films and it manifests itself via a bistability in the electron temperature. By studying the electron-phonon cooling rate in disordered, suspended films with two-dimensional phonons, we derive the conditions needed for such a bistability, which can be observed experimentally through hysteretic jumps of several orders of magnitude in the nonlinear current-voltage characteristics. We demonstrate that such a regime is achievable in systems with an Arrhenius form of the equilibrium conductivity, while practically unreachable in materials with Mott or Efros-Shklovskii hopping.
description: 8 pages, 4 figures
Twisted geometric Satake equivalence via gerbes on the factorizable grassmannian
Creators: name: Reich, Ryan Cohen
Publisher: name: arXiv
Year: 2010
Subjects: subject: Representation Theory (math.RT)
subject: FOS: Mathematics
subject: 22E57

description: We prove a generalization of the twisted geometric Satake equivalence of Finkelberg--Lysenko in the context of the factorizable grassmannian of a reductive group G relative to a smooth curve X, similar to Gaitsgory's generalization in "On de Jong's conjecture" of the Satake equivalence itself. In order to express the dependence of this result on factorizability, we consider a certain 2-category of gerbes on this grassmannian, which we call "sf gerbes"; the theorem then concerns perverse sheaves twisted by such gerbes. This notion of twisting differs from, but in special cases is equivalent to, that considered by Finkelberg--Lysenko. We give a classification of these gerbes in terms of quadratic forms on the coweight lattice of G and gerbes on X. In addition, we introduce the technical device of universal local acyclicity (ULA) into the proof of the Satake equivalence, using it in combination with Beilinson's nearby cycles gluing of perverse sheaves to reduce all of the main constructions in the Mirkovic--Vilonen proof of the equivalence to the ULA case, where they have simple descriptions whose properties have simple proofs. We also give a geometric proof that the category of spherical perverse sheaves on the ordinary affine grassmannian is semisimple.
description: 106 pages. Author's doctoral dissertation (this version with section and equation numbers matching the published version)
Design and Commissioning of the first two CYRCé Extension Beamlines
Creators: name: Bouquerel, E.
name: Traykov, E.
name: Maazouzi, C.
name: Rousseau, M.
name: Pellicioli, M.
name: Andrea, J.
name: Adam, T.
name: Graehling, P.
name: Mathieu, C.
name: Heitz, G.
name: Krauth, M.
name: Oster, D.
name: Foehrenbacher, T.
name: Ruescas, C.
name: Schuler, J.
name: Goerlach, U.
name: Haas, C.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Accelerator Physics (physics.acc-ph)
subject: FOS: Physical sciences

description: CYRCé is a TR24 cyclotron installed at the Institut Pluridisciplinaire Hubert Curien (IPHC) of Strasbourg operating at energies of 16-25 MeV and at intensities up to 400 $μ$A. The accelerator is used to produce and provide radioelements for PET and for SPECT. In 2015, IPHC started to develop a platform with the aim of performing radiobiological experiments. The PRECy platform foresees to contain three-to-five experimental stations linked to beamlines expanded from the second exit port of the cyclotron. This extension allows devoting one of the beamlines for detector studies within the framework of the CMS project. The design, the development and the commissioning of the first two beamlines are discussed in this paper.
description: 23 pages, 25 figures
Cognitive Loads and Training Success in a Video-Based Online Training Course
Creators: name: Stiller, Klaus D.
name: Köster, Annamaria
Publisher: name: Universität Regensburg
Year: 2017
Subjects: subject: Online training, Computer attitude, Computer anxiety, Prior knowledge, Online learning experience, Cognitive load.
subject: 150 Psychologie

description: Background: According to research based on cognitive load theory, the way of presenting information in an instructional environment is essential to the learning outcome. By avoiding unnecessary extraneous load caused by badly designed instructions and other sources, learners are more likely to successfully construct knowledge. In addition, learner characteristics are known to affect learning. Objective: This study explores the effects of learners’ online learning experience, domain-specific prior knowledge, computer attitude and computer anxiety on their perceived intrinsic, extraneous and germane load and on their learning outcome in a video-based training course about media design for employees. Method and Results: Learning outcome was assessed by ratings of subjective learning success, ratings of professional competence, the number of completed modules and performance. None of the learning outcome variables could be modelled when entering learner characteristics in a regression analysis, but all could be modelled using the cognitive load ratings. Conclusion: Thus, extraneous, intrinsic and germane load were the most important factors for explaining the learning outcome. This result points to the importance of instructional design and particularly to managing cognitive load in online training scenarios.
Random interlacement is a factor of i.i.d
Creators: name: Borbényi, Márton
name: Ráth, Balázs
name: Rokob, Sándor
Publisher: name: arXiv
Year: 2022
Subjects: subject: Probability (math.PR)
subject: Dynamical Systems (math.DS)
subject: FOS: Mathematics

description: The random interlacement point process (introduced by Sznitman, generalized by Teixeira) is a Poisson point process on the space of labeled doubly infinite nearest neighbour trajectories modulo time-shift on a transient graph $G$. We show that the random interlacement point process on any transient transitive graph $G$ is a factor of i.i.d., i.e., it can be constructed from a family of i.i.d. random variables indexed by vertices of the graph via an equivariant measurable map. Our proof uses a variant of the soft local time method (introduced by Popov and Teixeira) to construct the interlacement point process as the almost sure limit of a sequence of finite-length variants of the model with increasing length. We also discuss a more direct method of proving that the interlacement point process is a factor of i.i.d. which works if and only if $G$ is non-unimodular.
description: 33 pages + Appendix, minor updates compared to previous version (fixed some typos, added more references to the literature)
The SZ flux-mass ($Y$-$M$) relation at low halo masses: improvements with symbolic regression and strong constraints on baryonic feedback
Creators: name: Wadekar, Digvijay
name: Thiele, Leander
name: Hill, J. Colin
name: Pandey, Shivam
name: Villaescusa-Navarro, Francisco
name: Spergel, David N.
name: Cranmer, Miles
name: Nagai, Daisuke
name: Anglés-Alcázar, Daniel
name: Ho, Shirley
name: Hernquist, Lars
Publisher: name: arXiv
Year: 2022
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: Artificial Intelligence (cs.AI)
subject: Machine Learning (cs.LG)
subject: FOS: Physical sciences
subject: FOS: Computer and information sciences

description: Feedback from active galactic nuclei (AGN) and supernovae can affect measurements of integrated SZ flux of halos ($Y_\mathrm{SZ}$) from CMB surveys, and cause its relation with the halo mass ($Y_\mathrm{SZ}-M$) to deviate from the self-similar power-law prediction of the virial theorem. We perform a comprehensive study of such deviations using CAMELS, a suite of hydrodynamic simulations with extensive variations in feedback prescriptions. We use a combination of two machine learning tools (random forest and symbolic regression) to search for analogues of the $Y-M$ relation which are more robust to feedback processes for low masses ($M\lesssim 10^{14}\, h^{-1} \, M_\odot$); we find that simply replacing $Y\rightarrow Y(1+M_*/M_\mathrm{gas})$ in the relation makes it remarkably self-similar. This could serve as a robust multiwavelength mass proxy for low-mass clusters and galaxy groups. Our methodology can also be generally useful to improve the domain of validity of other astrophysical scaling relations. We also forecast that measurements of the $Y-M$ relation could provide percent-level constraints on certain combinations of feedback parameters and/or rule out a major part of the parameter space of supernova and AGN feedback models used in current state-of-the-art hydrodynamic simulations. Our results can be useful for using upcoming SZ surveys (e.g., SO, CMB-S4) and galaxy surveys (e.g., DESI and Rubin) to constrain the nature of baryonic feedback. Finally, we find that the an alternative relation, $Y-M_*$, provides complementary information on feedback than $Y-M$
description: Version appearing in MNRAS. Minor change to Fig.6 and added Fig. A5 compared to the previous version. 7+5 pages. The code and data associated with this paper are available at https://github.com/JayWadekar/ScalingRelations_ML
Preference-based Learning with Retrieval Augmented Generation for Conversational Question Answering
Creators: name: Kaiser, Magdalena
name: Weikum, Gerhard
Publisher: name: arXiv
Year: 2025
Subjects: subject: Computation and Language (cs.CL)
subject: Information Retrieval (cs.IR)
subject: FOS: Computer and information sciences

description: Conversational Question Answering (ConvQA) involves multiple subtasks, i) to understand incomplete questions in their context, ii) to retrieve relevant information, and iii) to generate answers. This work presents PRAISE, a pipeline-based approach for ConvQA that trains LLM adapters for each of the three subtasks. As labeled training data for individual subtasks is unavailable in practice, PRAISE learns from its own generations using the final answering performance as feedback signal without human intervention and treats intermediate information, like relevant evidence, as weakly labeled data. We apply Direct Preference Optimization by contrasting successful and unsuccessful samples for each subtask. In our experiments, we show the effectiveness of this training paradigm: PRAISE shows improvements per subtask and achieves new state-of-the-art performance on a popular ConvQA benchmark, by gaining 15.5 percentage points increase in precision over baselines.
description: WWW 2025 Short Paper, 5 pages
Social anxiety and empathy for social pain
Creators: name: Auyeung, Karen Wei
Publisher: name: University of British Columbia
Year: 2019

description: Social relationships are a vital component of human experience. An important part of developing positive social relationships is the ability to experience and express empathy for other people’s emotions (Baron-Cohen & Wheelwright, 2004). Unfortunately, building and maintaining positive relationships does not come easily to everyone. Individuals with social anxiety disorder have particular difficulty with emotion judgment, a central element of empathy. Despite these difficulties, findings from my previous research suggested that, faced with social threat, socially anxious individuals make more accurate judgments of others’ negative emotions compared to non-anxious individuals. The current research combined models of empathy, social anxiety, and social exclusion, to examine how social anxiety influenced the accuracy of emotion judgments, and whether social exclusion influenced this relationship. Across three studies, I investigated 1) the relationship between social anxiety and empathic accuracy, 2) potential mechanisms in the relationship between social anxiety and empathic accuracy, 3) the role of social exclusion on these relationships, and 4) the relationship between social anxiety, empathic accuracy, and positive social behaviours. Two studies were conducted in university undergraduate samples and a third study extended this research into a clinical community population. The findings have the potential to contribute to the understanding of socially anxious populations and inform treatments that may improve their interpersonal relationships.
Octopamine and Tyramine Contribute Separately to the Counter-Regulatory Response to Sugar Deficit in Drosophila
Creators: name: Brembs, Björn
name: Damrau, Christine
name: Toshima, Naoko
name: Colomb, Julien
name: Tanimura, Teiichi
Publisher: name: Universität Regensburg
Year: 2018
Subjects: subject: biogenic amines, starvation, starvation resistance, insects, proboscis extension response
subject: 590 Tiere (Zoologie)

description: All animals constantly negotiate external with internal demands before and during action selection. Energy homeostasis is a major internal factor biasing action selection. For instance, in addition to physiologically regulating carbohydrate mobilization, starvation-induced sugar shortage also biases action selection toward food-seeking and food consumption behaviors (the counter-regulatory response). Biogenic amines are often involved when such widespread behavioral biases need to be orchestrated. In mammals, norepinephrine (noradrenalin) is involved in the counterregulatory response to starvation-induced drops in glucose levels. The invertebrate homolog of noradrenalin, octopamine (OA) and its precursor tyramine (TA) are neuromodulators operating in many different neuronal and physiological processes. Tyrosine-ß-hydroxylase (tßh) mutants are unable to convert TA into OA. We hypothesized that tßh mutant flies may be aberrant in some or all of the counter-regulatory responses to starvation and that techniques restoring gene function or amine signaling may elucidate potential mechanisms and sites of action. Corroborating our hypothesis, starved mutants show a reduced sugar response and their hemolymph sugar concentration is elevated compared to control flies. When starved, they survive longer. Temporally controlled rescue experiments revealed an action of the OA/TA-system during the sugar response, while spatially controlled rescue experiments suggest actions also outside of the nervous system. Additionally, the analysis of two OA- and four TA-receptor mutants suggests an involvement of both receptor types in the animals' physiological and neuronal response to starvation. These results complement the investigations in Apis mellifera described in our companion paper (Buckemüller et al., 2017).
Statistical theory of structures with extended defects
Creators: name: Yukalov, V. I.
name: Yukalova, E. P.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: Many materials contain extended defects of nanosize scale, such as dislocations, cracks, pores, polymorphic inclusions, and other embryos of competing phases. When one is interested not in the precise internal structure of a sample with such defects, but in its overall properties as a whole, one needs a statistical picture giving a spatially averaged description. In this chapter, an approach is presented for a statistical description of materials with extended nanosize defects. A method is developed allowing for the reduction of the problem to the consideration of a set of system replicas representing homogeneous materials characterized by effective renormalized Hamiltonians. This is achieved by defining a procedure of averaging over heterophase configurations. The method is illustrated by a lattice model with randomly distributed regions of disorder.
description: Latex file, 27 pages, 3 figures,1 table