cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Efficient computation of option price sensitivities using homogeneity and other tricks
Creators: name: Reiß, Oliver
name: Wystup, Uwe
Publisher: name: Weierstrass Institute
Year: 2000
Subjects: subject: Calculation of Greeks
subject: Derivatives of option prices
subject: Homogeneity properties of financial markets
subject: 91-08
subject: 91B28

description: No front-office software can survive without providing derivatives of options prices with respect to underlying market or model parameters, the so called Greeks. We present a list of common Greeks and exploit homogeneity properties of financial markets to derive relationships between Greeks out of which many are model-independent. We apply the results to European style options, rainbow options, as well as options priced in Heston's stochastic volatility model and avoid exorbitant and time-consuming computations of derivatives which even strong symbolic calculators fail to produce.
Antiferromagnetic ground state with pair-checkboard order in FeSe
Creators: name: Cao, Hai-Yuan
name: Chen, Shiyou
name: Xiang, Hongjun
name: Gong, Xin-Gao
Publisher: name: arXiv
Year: 2014
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Monolayer FeSe thin film grown on SrTiO_{3}(001) (STO) shows the sign of T_{c}> 77 K, which is higher than the T_{c}-record of 56 K for the bulk FeAs-based superconductors. However, little is known about the magnetic ground state of FeSe, which should be closely related to its unusual superconductivity. Previous studies presume the collinear stripe antiferromagnetic (AFM) state as the ground state of FeSe, same to that in FeAs superconductors. Here we find a novel magnetic order named "pair-checkboard AFM" as the magnetic ground state of tetragonal FeSe. The novel pair-checkboard order results from the interplay between the nearest, the next-nearest and the unnegligible next-next-nearest neighbor magnetic exchange couplings of Fe atoms. The monolayer FeSe in pair-checkbord order shows an unexpected insulating behavior with a Dirac-cone-like band structure related to the specific orbital order of d_{xz} and d_{yz} characters of Fe atoms, which could explain recently observed insulator-superconductor transition. The present results cast new insights on the magnetic ordering in FeSe monolayer and its derived superconductors.
description: 13 pages, 3 figures, 1 table
Stochastic particle approximations for Smoluchowski's coagulation equation
Creators: name: Eibeck, Andreas
name: Wagner, Wolfgang
Publisher: name: Weierstrass Institute
Year: 2000
Subjects: subject: Stochastic particle method
subject: coagulation equation
subject: variance reduction
subject: gelation phenomena
subject: 60K40
subject: 65C35

description: This paper studies stochastic particle approximations for Smoluchowski's coagulation equation. A new stochastic algorithm with reduced variance is proposed. Its convergence behaviour is investigated, when the number of simulation particles tends to infinity. Under appropriate assumptions on the coagulation kernel, the limit is the unique solution of the coagulation equation. Then detailed numerical experiments are performed, testing the applicability and efficiency of the algorithm. In particular, the gelation phenomenon (loss of mass in the coagulation equation) is studied numerically for several kernels. A striking feature of the new algorithm is a better convergence after the gelation point, providing a tool for detecting the mass of the gel.
Conical diffraction by periodic structures: Variation of interfaces and gradient formulas
Creators: name: Elschner, Johannes
name: Schmidt, Gunther
Publisher: name: Weierstrass Institute
Year: 2000
Subjects: subject: Conical diffraction
subject: shape optimization
subject: Helmholtz equation
subject: 78A45
subject: 35J20
subject: 49J20

description: This paper studies the dependence of solutions to conical diffraction problems upon geometric parameters of non-smooth profiles and interfaces between different materials of diffractive gratings. This problem arises in the design of those optical devices to diffract time-harmonic oblique incident plane waves to a specified far-field pattern. We prove the stability of solutions and give analytic formulas for the derivatives of reflection and transmission coefficients with respect to Lipschitz perturbations of interfaces. These derivatives are expressible as contour integrals involving the direct and adjoint solutions of conical diffraction problems.
Generic Ward Configuration Simulation Model
Creators: name: Penn, Marion Louise
name: Monks, Thomas
Publisher: name: Zenodo
Year: 2018
Subjects: Discrete Event Simulation, Generic Modelling, Ward Modelling

description: This is a generic discrete event simulation model of a single hospital ward using Simul8 software. A separate Excel user interface is included for uploading data on any patient mix. In addition to changing the patient information the model allows the user to select the number of beds and how they are split between single rooms and multi-bed bays. The model is set up to ensure that each bay will remain single gender as required in many healthcare systems. The model is intended to allow consideration of the number of beds required and how they will be assigned to single rooms/multi-bed bays, possibly with changes to the patient mix. For further details please see the enclosed user guide.
title: Die Auswirkungen von Alkohol nach dem Sport auf die Regeneration
Creators: name: Löw, David
Year: 2021

description: Alkohol ist in unserer Gesellschaft nicht mehr wegzudenken, viele Menschen trinken täglich ein Bier oder ein Achterl Wein. Doch nicht nur allgemein in der Bevölkerung, sondern auch unter Sportler*innen, egal ob im Hobbybereich oder im Spitzensport, ist der Konsum von Alkohol nach dem Sport üblich. In diesem systematischen Review wurde der Fokus auf genau dieses Thema gelegt, nämlich auf die Auswirkungen von Alkohol auf die Regeneration, was von besonderer Bedeutung ist, je öfter Sport gemacht wird, da die Regenerationszeit so kurz wie möglich gehalten werden sollte. Die Literaturrecherche wurde nach dem PRISMA-Schema aufgebaut. Dadurch konn-ten in zwei verschiedenen Datenbanken 370 Studien gefunden werden. Von diesen blieben, nach Selektieren der Ein- und Ausschlusskriterien, zehn Studien für die Arbeit übrig, welche detailliert in die Arbeit aufgenommen wurden. Sie wurden zusätzlich hinsichtlich ihrer Qualität überprüft und klassifiziert. Die Analyse aller eingeschlossenen Studien ergab, dass ein negativer Effekt durch die Einnahme von Alko-hol nach dem Sport auf die Regeneration gegeben ist, welcher sich auf jeden Fall über die nächsten 60 h auswirken kann. Auch einige Blutwerte werden durch die Alkoholintervention beeinträchtigt, welche sich wiederum auf die Regeneration auswirken.
description: Alcohol has become indispensable in our society, many people drink a beer or an eight of wine every day. Not only in the general population, but also among athletes, whether in the hobby area or in top-class sport, the consumption of alcohol after sport is very common. In this systematic review the focus was placed on exactly this topic, namely on the effects of alcohol on regeneration, which is of particular im-portance the more often sport is done, since the regeneration time should be kept as short as possible. The literature search was based on the PRISMA scheme. This enabled 370 studies to be found in two different databases. From these, inclusion and exclusion criteria were used to select, so that only 10 studies remained for the work, which were included in the work in detail. In addition, these were checked and classified with regard to their quality. The analysis of all included studies showed that there is a negative effect of taking alcohol after exercise on regeneration, which can in any case have an impact over the next 60 hours. Some blood values are also af-fected by the alcohol intervention, which in turn affects regeneration.
Triple Microlens OGLE-2008-BLG-092L: Binary Stellar System with a Circumprimary Uranus-type Planet
Creators: name: Poleski, Radosław
name: Skowron, Jan
name: Udalski, Andrzej
name: Han, Cheongho
name: Kozłowski, Szymon
name: Wyrzykowski, Łukasz
name: Dong, Subo
name: Szymański, Michał K.
name: Kubiak, Marcin
name: Pietrzyński, Grzegorz
name: Soszyński, Igor
name: Ulaczyk, Krzysztof
name: Pietrukowicz, Paweł
name: Gould, Andrew
Publisher: name: arXiv
Year: 2014
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: FOS: Physical sciences

description: We present the gravitational microlensing discovery of a 4 M_Uranus planet that orbits a 0.7 M_Sun star at ~18 AU. This is the first known analog of Uranus. Similar planets, i.e., cold ice-giants, are inaccessible to either radial velocity or transit methods because of the long orbital periods, while low reflected light prevents direct imaging. We discuss how similar planets may contaminate the sample of the very short microlensing events that are interpreted as free-floating planets with an estimated rate of 1.8 per main sequence star. Moreover, the host star has a nearby stellar (or brown dwarf) companion. The projected separation of the planet is only ~3 times smaller than that of the companion star, suggesting significant dynamical interactions.
description: published in ApJ; the photometry and the code used for fitting the double-lens extended-source (with limb darkening) microlensing model are attached as ancillary files
The ages of zone of proximal development for retrospective time assessment and anticipation of time event
Creators: name: Portnova, Galina
name: Rebreikina, Anna
name: Martynova, Olga
Publisher: name: Taylor & Francis
Year: 2021
Subjects: subject: Medicine
subject: Neuroscience
subject: 39999 Chemical Sciences not elsewhere classified
subject: FOS: Chemical sciences
subject: Sociology
subject: FOS: Sociology
subject: Developmental Biology
subject: Statistics
subject: FOS: Mathematics
subject: Science Policy
subject: 111714 Mental Health
subject: FOS: Health sciences
subject: 110309 Infectious Diseases
subject: Computational Biology

description: From childhood to adulthood, an individual’s ability to estimate and anticipate the timing of events changes continuously. This study investigated the ability of 287 children aged 5–14 years to estimate the duration of prior events and anticipate the timing of future events for determination of the age at which children improve their timing skills. The Luria neuropsychological assessment battery and the Wechsler Intelligence Scale for Children (WISC-IV) were applied to find correlations between timing skills and the development of cognitive functions. The findings demonstrated that retrospective estimation of duration has a zone of proximal development in children between the ages of six to eight; in these children, the accuracy of time assessment significantly improved after receiving the prompt. However, improvement in time estimation was significantly lower in those children who achieved lower results in the attention and memory tests and demonstrated reduced spatial and verbal reasoning skills. The zone of proximal development for the ability to anticipate the timing of future events was demonstrated in children between the ages of nine to eleven years. The improvement of time anticipation was negatively correlated with the number of mistakes made during the dynamic praxis test.
Reconstruction of the null-test for the matter density perturbations
Creators: name: Nesseris, Savvas
name: Sapone, Domenico
name: García-Bellido, Juan
Publisher: name: arXiv
Year: 2014
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We systematically study the null-test for the growth rate data first presented in [S. Nesseris and D. Sapone, arXiv:1409.3697] and we reconstruct it using various combinations of data sets, such as the $fσ_8$ and $H(z)$ or Type Ia supernovae (SnIa) data. We perform the reconstruction in two different ways, either by directly binning the data or by fitting various dark energy models. We also examine how well the null-test can be reconstructed by future data by creating mock catalogs based on the cosmological constant model, a model with strong dark energy perturbations, the $f(R)$ and $f(G)$ models, and the large void LTB model that exhibit different evolution of the matter perturbations. We find that with future data similar to an LSST-like survey, the null-test will be able to successfully discriminate between these different cases at the $5σ$ level.
description: 15 pages; 10 figures; 5 tables
Predicting Leptonic CP phase by considering deviations in charged lepton and neutrino sectors
Creators: name: M., Sruthilaya
name: C., Soumya
name: Deepthi, K. N.
name: Mohanta, R.
Publisher: name: arXiv
Year: 2014
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: Recently, the reactor mixing angle $θ_{13}$ has been measured precisely by Daya Bay, RENO and T2K experiments with a moderately large value. However, the standard form of neutrino mixing patterns such as bimaximal, tri-bimaximal, golden ratio of types A and B, hexagonal etc., which are based on certain flavor symmetries, predict vanishing $θ_{13}$. Using the fact that the neutrino mixing matrix can be represented as $V_{\rm PMNS}=U_l^{\dagger} U_νP_ν$, where $U_l$ and $U_ν$ result from the diagonalization of the charged lepton and neutrino mass matrices and $P_ν$ is a diagonal matrix containing Majorana phases, we explore the possibility of accounting for the large reactor mixing angle by considering deviations both in the charged lepton and neutrino sector. In the charged lepton sector we consider the deviation as an additional rotation in the (12) and (13) planes, whereas in neutrino sector we consider deviations to various neutrino mixing patterns through (13) and (23) rotations. We find that with the inclusion of these deviations it is possible to accommodate the observed large reactor mixing angle $θ_{13}$, and one can also obtain limits on the CP violating Dirac phase $δ_{CP}$ and Jarlskog invariant $J_{CP}$ for most of the cases. We then explore whether our findings can be tested in the currently running NO$ν$A experiment with 3 years of data taking in neutrino mode followed by 3 years with anti-neutrino mode.
description: 23 pages, 5 figures, revised version, to appear in New Journal of Physics
Sequential downscaling of GRACE products to map groundwater level changes in Krishna River basin
Creators: name: Gorugantula, Sai Srinivas
name: Kambhammettu, BVN P
Publisher: name: Taylor & Francis
Year: 2022
Subjects: subject: Molecular Biology
subject: Ecology
subject: FOS: Biological sciences

description: We propose a deep learning model: long short-term memory (LSTM) networks to spatially downscale Global Recovery and Climate Experiment (GRACE)-derived terrestrial water storage anomalies (TWSA) with an objective to map groundwater level anomalies (GWLA) at 0.25° resolution for basin-scale applications. Monthly TWSA from global spherical harmonic (GSH) and global mascons (GM) during 2002 to 2017 were obtained at 1° scales for the Krishna River. Eleven hydro-climatic variables were considered to observe their dependence on TWSA and further reduced to three principal components. The LSTM’s recurrent neural networks, with a 12-month lag to control flow of information in the memory units, were applied to downscale TWSA. At basin scale, downscaled GWLA from the two GRACE solutions have reasonably captured the observed trends (r > 0.6); however, GSH has underestimated the peaks (BIAS = 7.83 cm). The strong signal amplitude resulting from reduced leakage made GM a better choice over GSH in downscaling TWSA, particularly for the land–ocean mixed pixels (rGM = 0.74, rGSH = 0.62).
Quantum gravity corrections to the conformally coupled scalar self-mass-squared on de Sitter background
Creators: name: Boran, Sibel
name: Kahya, E. O.
name: Park, Sohyun
Publisher: name: arXiv
Year: 2014
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We evaluate one loop quantum gravity corrections to the conformally coupled (CC) scalar self-mass-squared on a locally de Sitter background. In this paper we consider only the conformal-conformal interaction part of the self-mass-squared. This complements the minimal-minimal part worked out in the previous paper [E. O. Kahya and R. P. Woodard, Phys. Rev. D 76, 124005 (2007), arXiv: 0709.0536], and we will add the minimal-conformal part in a follow-up paper to complete the full self-mass-squared at one loop order. The computation is performed using dimensional regularization and the results are fully renormalized by absorbing divergences with counterterms. The finite results can give rise to quantum corrections to the CC scalar mode functions and therefore to their power spectra.
description: 27 pages, 4 figures. Comments and references added; v2 matches the published version in PRD
title: Introduction
title: Crossing Borders, Establishing Dialogues
titleType: Subtitle
Creators: name: Castello Branco, Patrícia
Publisher: name: IFILNOVA, Faculdade de Ciências Sociais e Humanas, Universidade NOVA de Lisboa
Year: 2022

description: The 14th issue of Cinema - Journal of Philosophy and the Moving Image is dedicated to the theme of Film and Non-western thought. Non-Western thought is a term that has been used in the last decade, mainly in the field of political thought and international relations, aiming to convey traditions of thought that do not belong to Western and European philosophical canons. More than ageographical delimitation, non-Western thought aims at describing structures of thought born outside the European philosophical context. With this issue, we intend to integrate these traditions within the field of film and philosophy, broadening the very term ‘philosophy’ to incorporate non-Western rooted forms of thinking. These include the rich thought traditions of Asia, Africa, and Native America, as well as the rest of the world. The way these traditions produce and are embedded in specific films or film theories can help us overcome the hegemony of Western worldviews, integrating the rich diversity of human thought in the field of cinema.The main aim was to enable an encounter between different systems of thought and cinema, deepening and exploring the way in which ideas, connections, and visions of the world outside of western philosophy are embodied in specific films, either through their devices and aesthetic options, or in terms of content. Ideas can take many forms, moving images being one of them. The way ideas coming from non-Western tradition are embedded in films is also a way of contributing to giving voice to worldviews outside of Western philosophy, bringing to light new and rich approaches of great relevance in this era in which we need tobuild bridges, establish dialogues, and open the doors to world views outside the Western canon.
description: Castello Branco, Patrícia (2022). Introduction: Crossing Borders, Establishing Dialogues. Cinema: Journal of Philosophy and the Moving Image (14), 7-9. ISSN: 1647-8991
Tidal dissipation in a homogeneous spherical body. II. Three examples: Mercury, Io, and Kepler-10 b
Creators: name: Makarov, Valeri V.
name: Efroimsky, Michael
Publisher: name: arXiv
Year: 2014
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: Geophysics (physics.geo-ph)
subject: FOS: Physical sciences

description: In Efroimsky & Makarov (2014), we derived from the first principles a formula for the tidal heating rate in a tidally perturbed homogeneous sphere. We compared it with the formulae used in the literature, and pointed out the differences. Using this result, we now present three case studies - Mercury, Kepler-10b, and a triaxial Io. A very sharp frequency-dependence of k2/Q near spin-orbit resonances yields a similarly sharp dependence of k2/Q on the spin rate. This indicates that physical libration may play a major role in tidal heating of synchronously rotating bodies. The magnitude of libration in the spin rate being defined by the planet's triaxiality, the latter should be a factor determining the dissipation rate. Other parameters equal, a synchronously rotating body with a stronger triaxiality should generate more heat than a similar body of a more symmetrical shape. Further in the paper, we discuss scenarios where initially triaxial objects melt and lose their triaxiality. Thereafter, dissipation in them becomes less intensive; so the bodies freeze. The tidal bulge becomes a new permanent figure, with a new triaxiality lower than the original. In the paper, we also derive simplified, approximate expressions for dissipation rate in a rocky planet of the Maxwell rheology, with a not too small Maxwell time. The three expressions derived pertain to the cases of a synchronous spin, a 3:2 resonance, and a nonresonant rotation; so they can be applied to most close-in super-Earth exoplanets detected thus far. In such bodies, the rate of tidal heating outside of synchronous rotation is weakly dependent on the eccentricity and obliquity, provided both these parameters are small or moderate. According to our calculation, Kepler-10b could hardly survive the great amount of tidal heating without being synchronised, circularised and also reshaped through a complete or partial melt-down.
title: Die ökologischen Folgen der Pest im Spätmittelalter (1346 bis 1352) in Europa
Creators: name: Burket, Sarah Sophie
Year: 2021

description: Die vorliegende Masterarbeit beschäftigt sich mit den ökologischen Folgen nach der großen Pestepediemie im Spätmittelalter 1346 – 1352 in Europa. Das Ziel der Forschung ist es herauszufinden, zu welchen Veränderungen die Pest in der Umwelt und in der Landwirtschaft führte. Die Masterarbeit ist eine Literaturgestützte Arbeit und beschäftigt sich vor allem mit der Theorie der Agrarkrise des deutschen Historikers Wilhelm Abel. Zusätzlich zu dieser Theorie wird ein Stadt-Land Vergleich gezogen, um festzustellen inwiefern sich die Folgen auf die unterschiedlichen Lebensbereiche unterscheiden. Des Weiteren untersucht die Arbeit auch die landschaftlichen und gesellschaftlichen Entwicklungen vor dem Pestausbruch, um zu erkennen, inwiefern diese Bedingungen zur Verbreitung der Pest beigetragen haben. Die Hochblüte des Spätmittelalters wurde durch das Einschreiten der kleinen Eiszeit unterbrochen und die Pest fand den perfekten Nährboden, um sich in Europa über die Handelswege in den florierenden Städten auszubreiten. Die Folgen der Pest führten zu einem Wandel der Landwirtschaft. Der Getreidebau wurde durch die weniger arbeitsintensive Viehzucht und dem Anbau von Sonderkulturen, wie zum Beispiel Wein oder Hopfen, ersetzt und die Bevölkerung im ländlichen Raum verzeichnete langfristig stärkere Rückgänge als die Städte.
Vivere il presente, progettare il futuro. L’esperienza sociale della transizione professionale
Creators: name: Piromalli, Leonardo
Publisher: name: Cambio. Rivista sulle Trasformazioni Sociali
Year: 2018

description: The aim of this paper is to explore the social experiences of some workers in different professional transition scenarios. I focus on observing subjective practices, precariousness and impermanences in order to grasp the tensions in individual experience and understand the meanings actors assign them. I gathered sixteen semi-structured interviews with workers in professional transition phases distributed in four different scenarios, balanced by gender. Basing on the stories collected, I discuss of an occasionally harsh tension between the experience subjects wish for themselves and the one organizational instances impose on them. Subjectivity as an assertion of originality and authenticity thus conflicts with rationalization as an incitement to efficiency and progress. Also, different spheres of experience seem to mutually interact. Employment, therefore, would be a sort of carrier for autonomy, as it would enable the subject to plan and act on other spheres of experience.
description: Cambio. Rivista sulle Trasformazioni Sociali, Vol. 8 No. 15 (2018): Another World is Possible. Collaborate to Transform
title: Illuminierte Kardinalsammelindulgenzen
Creators: name: Rosenkranz, Stephanie Susanna
Year: 2021

description: Ziel dieser Arbeit war das Erstellen von Regesten für 81 illuminierte Kardinalsammelindulgenzen aus dem Zeitraum 1413–1524. Die dadurch gewonnenen Erkenntnisse wurden in einem analytischen Teil ausgewertet. Die Auswahl der mittelalterlichen Urkunden basiert auf der im Rahmen des FWF-Projektes „Illuminierte Urkunden als Gesamtkunstwerk“ an der Österreichischen Akademie der Wissenschaften virtuell zusammengetragenen Sammlung der „Illuminierten Kardinalsammelindulgenzen“ (Urkundenplattform: monasterium.net, Stand: Juli 2019). Dabei konnten für die vorliegende Arbeit nur die Urkunden berücksichtigt werden, welche zu diesem Zeitpunkt eine zur Bearbeitung ausreichend hochwertige Abbildung aufwiesen. Im analytischen Teil der Arbeit wurden das Phänomen dieser Art des Sammelablasses in seinen historischen und sozio-kulturellen Kontext gesetzt, seine inneren und äußeren Merkmale mit den Forschungserkenntnissen von Alexander Seibold zu den kurialen Sammelindulgenzen abgeglichen und vertieft sowie die Rolle der verschiedenen Akteure im Entstehungsprozess näher beleuchtet. Letzteres liefert Einblicke in die Motivation hinter der Erwirkung illuminierter Kardinalsammelindulgenzen, ihre Funktion und ihre Auswirkungen, den Einfluss auf ihre Beschaffenheit sowie in einzelne Kommunikationsstränge zwischen der päpstlichen Kurie und den Petenten. Ihre Rezeption hängt nicht zuletzt auch mit der künstlerischen Ausstattung zusammen, über welche ein Überblick geboten wird. Ebenso wird auf die damit zusammenhängende Publizität und den Werbecharakter dieser Urkundengattung eingegangen. Eine Fallstudie zur Baugeschichte einzelner Empfängerinstitutionen fordert zur Neubewertung des in der Forschung für gegeben erachteten Zusammenhangs zwischen Ablassurkunden und Bautätigkeit an sakralen Gebäuden auf. Es konnte gezeigt werden, dass illuminierte Kardinalsammelindulgenzen durchaus erfolgreich im Rahmen des Ablasswesens als Instrumente zur Schwarmfinanzierung für (Bau-)Projekte eingesetzt wurden, die Motivation hinter der Erwirkung einer illuminierten Kardinalsammelindulgenz jedoch deutlich vielschichtiger sein konnte.
Non-perturbative fixed points and renormalization group improved effective potential
Creators: name: Dias, A. G.
name: Ferrari, A. F.
name: Gomez, J. D.
name: Natale, A. A.
name: Quinto, A. G.
Publisher: name: arXiv
Year: 2014
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: The stability conditions of a renormalization group improved effective potential have been discussed in the case of scalar QED and QCD with a colorless scalar. We calculate the same potential in these models assuming the existence of non-perturbative fixed points associated to a conformal phase. In the case of scalar QED the barrier of instability found previously is barely displaced as we approach the fixed point, and in the case of QCD with a colorless scalar not only the barrier is changed but the local minimum of the potential is also changed.
description: 6 pages, 8 figures, References added. Matching the journal version
Organizzazione produttiva e politiche per la conciliazione in un’azienda del Mezzogiorno d’Italia
Creators: name: Sacco, Enrico
Publisher: name: Cambio. Rivista sulle Trasformazioni Sociali
Year: 2018

description: The objective of the present analysis is to understand some of the social and institutional dynamics on which gender asymmetry is founded within large companies. The idea was to study, in a region of Southern Italy, a productive organization in the service sector that has recently adopted policies and strategies for the conciliation. The basic hypothesis that has oriented the case study is that the results of these interventions depend on social and cultural factors and specific managerial cultures. More specifically, we focus on: (1) the organization of work activities and its influence on private and family lives; (2) the main difficulties related to the employment conditions and their consequences on future prospects; (3) the ability – and the inability – of the trade unions to comprehend the needs of women workers and (4) the impact of top management decisions in the field of conciliation policies.
description: Cambio. Rivista sulle Trasformazioni Sociali, Vol. 8 No. 15 (2018): Another World is Possible. Collaborate to Transform
Sequential downscaling of GRACE products to map groundwater level changes in Krishna river basin
Creators: name: Gorugantula, Sai Srinivas
name: Kambhammettu, BVN P
Publisher: name: Taylor & Francis
Year: 2022
Subjects: subject: Molecular Biology
subject: Physiology
subject: FOS: Biological sciences
subject: Biotechnology
subject: Ecology
subject: 80699 Information Systems not elsewhere classified
subject: FOS: Computer and information sciences
subject: 110309 Infectious Diseases
subject: FOS: Health sciences

description: We propose a deep learning model: long short-term memory (LSTM) networks to spatially downscale GRACE derived terrestrial water storage anomalies (TWSA) with an objective to map groundwater level anomalies (GWLA) at 0.25o resolution for basin scale applications. Monthly TWSA from spherical harmonic (GSH) and mascon (GM) during 2002 to2017 were obtained at 1o scales for the Krishna river. Eleven hydro-climatic variables were considered to see their dependence on TWSA and further reduced to three principal components. The LSTM’s recurrent neural networks with a 12-month lag to control flow of information in the memory units was applied to downscale TWSA. At basin-scale, downscaled GWLA from the two GRACE solutions have reasonably captured the observed trends (r>0.6), however, GSH has underestimated the peaks (BIAS=7.83 cm). The strong signal amplitude resulting from reduced leakage made GM as a better choice over GSH in downscaling TWSA, particularly for the land-ocean mixed pixels (rGM=0.74, rGSH=0.62).
Negoziare qui-ed-ora: co-produrre conoscenza in aree fragili
Creators: name: Li Destri Nicosia, Giulia
Publisher: name: Cambio. Rivista sulle Trasformazioni Sociali
Year: 2018

description: Based on a field research in Riace (deemed a “model of hospitality”) from January to December 2017, this paper shows how the concept of community can operate as an apparatus (dispositif): a peculiar theoretical lens to investigate how different subjectivities and social actors – including the researcher – are shaped by, involved in, or excluded from interest formation processes, in the attempt to negotiate a here-and-now. The result is an investigation on the divide between participant observation and action research: being a "node of the field", can the researcher contribute to a co-production of knowledge, which in turn can trigger new processes of formation of interest?
description: Cambio. Rivista sulle Trasformazioni Sociali, Vol. 8 No. 15 (2018): Another World is Possible. Collaborate to Transform
Advancing traditional strategies for testing hydrological model fitness in a changing climate
Creators: name: Todorović, Andrijana
name: Grabs, Thomas
name: Teutschbein, Claudia
Publisher: name: Taylor & Francis
Year: 2022
Subjects: subject: Sociology
subject: FOS: Sociology
subject: 69999 Biological Sciences not elsewhere classified
subject: FOS: Biological sciences
subject: Inorganic Chemistry
subject: FOS: Chemical sciences

description: Mitigation of adverse effects of global warming relies on accurate flow projections under climate change. These projections usually focus on changes in hydrologic signatures, such as 100-year floods, which are estimated through statistical analyses of simulated flows under baseline and future conditions. However, models used for these simulations are traditionally calibrated to reproduce entire flow series, rather than statistics of hydrologic signatures. Here, we consider this dichotomy by testing whether performance indicators (e.g., Nash-Sutcliffe coefficient) are informative about model ability to reproduce distributions and trends in the signatures. Results of streamflow simulations in 50 high-latitude catchments with the 3DNet-Catch model show that high model performances according to traditional indicators do not assure that distributions or trends in hydrologic signatures are well reproduced. We, therefore, suggest that performance in reproducing distributions and trends in hydrologic signatures should be included in the process of model selection for climate change impacts studies.
Boiling of the Interface between Two Immiscible Liquids below the Bulk Boiling Temperatures of Both Components
Creators: name: Pimenova, Anastasiya V.
name: Goldobin, Denis S.
Publisher: name: arXiv
Year: 2014
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: Fluid Dynamics (physics.flu-dyn)
subject: FOS: Physical sciences

description: We consider the problem of boiling of the direct contact of two immiscible liquids. An intense vapour formation at such a direct contact is possible below the bulk boiling points of both components, meaning an effective decrease of the boiling temperature of the system. Although the phenomenon is known in science and widely employed in technology, the direct contact boiling process was thoroughly studied (both experimentally and theoretically) only for the case where one of liquids is becoming heated above its bulk boiling point. On the contrary, we address the case where both liquids remain below their bulk boiling points. In this paper we construct the theoretical description of the boiling process and discuss the actualisation of the case we consider for real systems.
description: 17 page, 7 figures, accepted to Eur. Phys. J. E
Assessment of enhanced Kohonen self-organizing map, quantile mapping and copula-based bias-correction approaches for constructing basin-scale rainfall forecasts
Creators: name: Khatun, Amina
name: Sahoo, Bhabagrahi
name: Chatterjee, Chandranath
Publisher: name: Taylor & Francis
Year: 2022
Subjects: subject: Medicine
subject: Neuroscience
subject: 59999 Environmental Sciences not elsewhere classified
subject: FOS: Earth and related environmental sciences
subject: Ecology
subject: FOS: Biological sciences
subject: Sociology
subject: FOS: Sociology
subject: 69999 Biological Sciences not elsewhere classified
subject: 80699 Information Systems not elsewhere classified
subject: FOS: Computer and information sciences

description: This study evaluates the performance of an enhanced Kohonen self-organizing map (eKSOM)-based bias-correction technique and compares the results with a copula-based bias-correction approach and the traditional quantile mapping (QM) to correct the daily multi-model ensemble short- to medium-range rainfall forecast products of the India Meteorological Department (IMD-MME) in the Hirakud Reservoir catchment in India. The copula and eKSOM outperformed the raw IMD-MME and QM rainfall across all lead times. While both the copula and eKSOM-based bias-corrected forecasts could satisfactorily provide the temporal pattern of the observed rainfall, the corresponding eKSOM-based forecasts presented better skills in capturing seasonality in the observed rainfall. The streamflow at one- to five-day lead times are simulated by forcing a suitable hydrological model, MIKE11 NAM (Nedbør Afstrømnings Model)-HD (Hydrodynamic) with the raw and bias-corrected rainfall inputs. The overall performance evaluation reveals significant improvement in both the rainfall and streamflow forecasts by copula and eKSOM, with the latter performing most accurately at higher lead times.
Rigidity and infinitesimal deformability of Ricci solitons
Creators: name: Kroencke, Klaus
Publisher: name: arXiv
Year: 2014
Subjects: subject: Differential Geometry (math.DG)
subject: FOS: Mathematics
subject: 53C25, 53C21

description: In this paper, an obstruction against the integrability of certain infinitesimal solitonic deformations is given. Using this obstruction, we show that the complex projective spaces of even complex dimension are rigid as Ricci solitons although they have infinitesimal solitonic deformations.
description: 11 pages, final version, to appear in J. Geom. Anal
title: Steuerliche Grenzen und Möglichkeiten der Ausgliederung von Betrieben gemeinnütziger Vereine und die Reichweite deren Vermögensverwaltung
Creators: name: Dolinski, Karol
Year: 2021

description: Gemeinnützige Vereine können vielfältige steuerliche Gestaltungsmöglichkeiten nutzen, solange die wesentlichen Voraussetzungen und Rahmenbedingungen der Gemeinnützigkeit nach der Bundesabgabenordnung auch statutarisch gedeckt sind. Ausgliederungen von wirtschaftlichen Geschäftsbetrieben bzw Gewinnbetrieben aus einem gemeinnützigen Verein in eine Tochter-Kapitalgesellschaft müssen statutarisch in den ideellen Mitteln gedeckt sein. Diese Ausgliederungen können sowohl im Rahmen des Artikel III UmgrStG als auch unter Anwendung des allgemeinen Ertragsteuerrechts erfolgen. Abschließend ist festzuhalten, dass auch die im Rahmen der Vermögensverwaltung erwirtschafteten Beteiligungserträge von Kapitalgesellschaften zur Erreichung des gemeinnützigen Vereinszwecks statutarisch in den materiellen Mitteln gedeckt sein müssen, um die abgabenrechtlichen Begünstigungen zu wahren. Beteiligungserträge sind, wie auch Erträge aus Vermietung und Verpachtung, auf Vereinsebene von der Körperschaftsteuer befreit. Ob es sich beim gemeinnützigen Verein um steuerlich begünstigte Vermögensverwaltung gemäß § 32 BAO oder um abgabenrechtlich schädliche Vermögensvermehrung bzw Vermögensverwertung handelt, ist jeweils einzelfallbezogen zu beurteilen. Die im Rahmen dieser Master Thesis angewandten Methoden orientieren sich an den allgemeinen wissenschaftlichen und juristischen Grundsätzen.
Supersymmetric Custodial Higgs Triplets and the Breaking of Universality
Creators: name: Garcia-Pepin, Mateo
name: Gori, Stefania
name: Quiros, Mariano
name: Vega, Roberto
name: Vega-Morales, Roberto
name: Yu, Tien-Tien
Publisher: name: arXiv
Year: 2014
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: Higgs triplet models are known to have difficulties obtaining agreement with electroweak precision data and in particular constraints on the $ρ$ parameter. Either a global $SU(2)_L \otimes SU(2)_R$ symmetry has to be imposed on the scalar potential at the electroweak scale, as done in the well-known Georgi-Machacek (GM) model, or the triplet vacuum expectation values must be very small. We construct a supersymmetric model that can satisfy constraints on the $ρ$ parameter, even if these two conditions are not fulfilled. We supersymmetrize the GM model by imposing the $SU(2)_L \otimes SU(2)_R$ symmetry at a scale $\mathcal M$, which we argue should be at or above the messenger scale, where supersymmetry breaking is transmitted to the observable sector. We show that scales $\mathcal M$ well above 100 TeV and sizable contributions from the triplets to electroweak symmetry breaking can be comfortably accommodated. We discuss the main phenomenological properties of the model and demonstrate that the departure from custodial symmetry at the electroweak scale, due to radiative breaking, can show up at the LHC as a deviation in the `universal' relation for the Higgs couplings to $WW$ and $ZZ$. As a by-product of supersymmetry, we also show that one can easily obtain both large tree-level \emph{and} one loop corrections to the Higgs mass. This allows for stops that can be significantly lighter and with smaller mixing than those needed in the MSSM.
description: v3 small comments added. version to be published in journal
Un altro (pezzo di) mondo è possibile. Secessione e concentrazione
Creators: name: Alagna, Mirko
Publisher: name: Cambio. Rivista sulle Trasformazioni Sociali
Year: 2018

description: In this contribution I will analyze in which way and what forms the aspiration to another world has survived the Twentieth Century. In my opinion, the accent should not be placed on the dichotomy possible/impossible, but on the conditions of possibility: in which way, at what price, with what instruments it is considered possible to build another world? I will argue that this aspiration now presents itself in non-universalistic forms: it is no longer a matter of building another possible world, but several pieces of the world. This implies a partial depoliticization of the dream of other possible worlds: politics is no longer considered - and can no longer be considered - the principal or indispensable tool for changing the world. It is not (only) a question of his perceived powerlessness in the face of other forces; far more profoundly, politics is cumbersome, because it carries with it two universalistic tendencies: politics is to rule everyone on everything. Exactly what we do not want (and cannot) to do anymore.
description: Cambio. Rivista sulle Trasformazioni Sociali, Vol. 8 No. 15 (2018): Another World is Possible. Collaborate to Transform
Mathematics Degree Final Thesis
Creators: name: Laguna Miralles, Júlia
Publisher: name: Zenodo
Year: 2023

description: Mathematics Degree Final Thesis: "Theoretical and business feasibility comparison between the TabNet and XGBoost algorithms for tabular data classification tasks at CaixaBank Business Intelligence".
Abstract:
The use of the architecture known as Transformers has drastically revolutionized the field of Natural Language Processing, optimizing the work of Machine Learning models being trained with unstructured data. At Caixabank Business Intelligence (CBI), 88% of the currently used Machine Learning models are trained with tabular data, which are traditionally fitted using Decision Tree based algorithms, for which up to date, XGBoost (Extreme Gradient Boosting) has proven to be the best approach. In 2019, Google published a new algorithm, called TabNet (Attentive Interpretable Tabular Learning), which adapts the Transformers key aspects to tabular data, while also implementing the main advantages of Decision Tree based structures. The aim of this thesis is to perform a theoretical study of the TabNet and XGBoost algorithms, with the goal of devising a TabNet pipeline to train CBI binary classification models, and compare their results with those obtained via the already in use XGBoost algorithm. Additionally, due to the recent deal between Caixabank and Google Cloud, the required workflow and hyperparameter tuning devising for the TabNet algorithm has been carried on, as a test-drive, on the newly acquired platform of Google Cloud.
Rayleigh-Bénard Instability in Graphene
Creators: name: Furtmaier, Oliver
name: Mendoza, Miller
name: Karlin, Ilya
name: Succi, Sauro
name: Herrmann, Hans Jürgen
Publisher: name: arXiv
Year: 2014
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Quantum Gases (cond-mat.quant-gas)
subject: Cellular Automata and Lattice Gases (nlin.CG)
subject: Fluid Dynamics (physics.flu-dyn)
subject: FOS: Physical sciences

description: Motivated by the observation that electrons in graphene, in the hydrodynamic regime of transport, can be treated as a two-dimensional ultra-relativistic gas with very low shear viscosity, we examine the existence of the Rayleigh-Bénard instability in a massless electron-hole plasma. Firstly, we perform a linear stability analysis, derive the leading contributions to the relativistic Rayleigh number, and calculate the critical value above which the instability develops. By replacing typical values for graphene, such as thermal conductivity, shear viscosity, temperature, and sample sizes, we find that the instability might be experimentally observed in the near future. Additionally, we have performed simulations for vanishing reduced chemical potential and compare the measured critical Rayleigh number with the theoretical prediction, finding good agreement.
description: 10 pages, 9 figures
Parallel Dynamic Mode Decomposition - Identifying spatiotemporal patterns with HPC
Creators: name: Blind, Lena
Publisher: name: Zenodo
Year: 2021
Subjects: Dynamic Mode Decomposition
DMD
HPC
High Performance Computing
parallel
nonlinear

description: The complexity of problems faced in many practical applications, inter alia occurring in natural, physical, and engineering science, is increasingly prevalent.
 However, until this very day, there exists no fully developed theory for grand challenges such as climate (change), disease modeling, or the unraveling of all functionalities of the human brain.
 One may remark, that despite the partly extensively varying context, these topicalities all may be classified as high-dimensional phenomena which evolve (nonlinearly) in time. Such, however, are typically confronted with one grand challenge: they are (yet) too complex to be understood by a first principles approach. The era of Big Data with the rise of memory capacities, processor frequencies, and further developed technology, introduces another strategy to be considered: The concept of data-driven techniques.
 Thus, instead of formulating complete theorems first, one may extract the most dominant system dynamics directly from the corresponding data.
 Though tempting in theory, one must be particularly aware of one challenge coming along with inflating data amounts, i.e., the growth of execution time. Thus, to overcome this obstacle, one may exploit optimization techniques of High-Performance Computing (HPC).
 The conflation of both, i.e., the development of a data-driven HPC technique, with the concrete example of the (Parallel) Dynamic Mode Decomposition, is discussed in this thesis.
Scrivere cambiando, cambiare scrivendo. Il rapporto ricercatore/attore nello studio dei movimenti sociali
Creators: name: Bertuzzi, Niccolò
Publisher: name: Cambio. Rivista sulle Trasformazioni Sociali
Year: 2018

description: Is it possible a value-free social research and without an ethical/political involvement of the researcher? If so, is it desirable? After a brief excursus on the origins of the sociological debate to be sought in anthropology emancipated from colonial discipline, the engaged/detached dichotomy will be recalled, along with some research programs that presuppose (even if in different ways) the involvement of the researcher. In the second part of the article, the attention will be focused on the specific sector of social movements studies, in which these issues assume central importance. Finally, we will take into account some empirical researches, to make the previously issues tangible. The reference will be to the relationship with the social actors and the issues they refer to, as emerged in three case studies: on the No-Expo Network, on the animal rights movement and on the relationship between movement activists and the European Union.
description: Cambio. Rivista sulle Trasformazioni Sociali, Vol. 8 No. 15 (2018): Another World is Possible. Collaborate to Transform