cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Scientific literacy in primary education: perspectives to citizen science
Creators: name: Marinho, Suziane
Publisher: name: Zenodo
Year: 2023

description: Scientific literacy helps the ordinary citizen to understand the world through scientific explanation. It fosters in him/her both the possibility of understanding the world around him/her from a scientific perspective, as well as the taste and possibility of contributing to science. In this sense, it can be said that the earlier citizens are brought into contact with science, the greater the likelihood of future engagement, which directly contributes to the adoption, expansion and development of citizen science. Thus, the general objective of the poster is to present different activities that can contribute to the development of children's scientific literacy. In particular, it aims to discuss the importance of involving citizens at an early stage in science-related activities; to encourage and offer models that can be applied in other contexts; and to contribute to the discussion on the possible impact that this type of action can have in the long term for the spread/maintenance of citizens involved in science. The work is based on a literature review to provide a theoretical foundation for the issues presented in the study. As a case study, we consider the Rómulo Centro Ciência Viva of the University of Coimbra, Portugal. Among the projects developed by the Centre, some activities that take place within the framework of the "Escola Ciência Viva" project are analysed. "Escola Ciência Viva" takes place over the course of a week and gives children in the 4th grade (9 to 10 years old) the opportunity to be exposed to different experiences focused on the STEAM field. Based on scientific experiments, the basics behind the experiences are explained to the children in order to contextualise and relate them to their everyday actions. From the direct observation method, it was found that the children are able to understand the scientific bases by exposing the concepts. The scientific concepts become easy to understand given the experiments in which children participate and the examples that are discussed, which relate to their everyday lives. We conclude that this project is an example of an action that can have future implications on the engagement of children as more active citizens in constructing and participating in science.
description: This poster was presented during the 4th Open Science Fair (25-27 September, Madrid, Spain)
Uniqueness of dynamical zeta functions and symmetric products
Creators: name: Gomez, Eduardo Blanco
name: Hernandez-Corbato, Luis
name: del Portal, Francisco R. Ruiz
Publisher: name: arXiv
Year: 2016
Subjects: subject: Dynamical Systems (math.DS)
subject: FOS: Mathematics

description: A characterization of dynamically defined zeta functions is presented. It comprises a list of axioms, natural extension of the one which characterizes topological degree, and a uniqueness theorem. Lefschetz zeta function is the main (and proved unique) example of such zeta functions. Another interpretation of this function arises from the notion of symmetric product from which some corollaries and applications are obtained.
description: 25 pages, 2 figures. Final version to appear in J. Fixed Point Theory Appl
Timelike BKL singularities and chaos in AdS/CFT
Creators: name: Shaghoulian, Edgar
name: Wang, Huajia
Publisher: name: arXiv
Year: 2016
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We study the nature of a family of curvature singularities which are precisely the timelike cousins of the spacelike singularities studied by Belinski, Khalatnikov, and Lifshitz (BKL). We show that the approach to the singularity can be modeled by a billiard ball problem on hyperbolic space, just as in the case of BKL. For pure gravity, generic chaotic behavior is retained in (3+1) dimensions, and we provide evidence that it disappears in higher dimensions. We speculate that such singularities, if occurring in AdS/CFT and of the chaotic variety, may be interpreted as (transient) chaotic renormalization group flows which exhibit features reminiscent of chaotic duality cascades.
description: 22 pages plus appendices. v2: references added and relation to earlier work clarified
Replicability and transparency in topic modelling: developing best practice guidelines for the digital humanities
Creators: name: Rodrigues Gomide, Andressa
name: Gillings, Mathew
name: Gimenez, Diego
Publisher: name: Zenodo
Year: 2023
Subjects: topic modeling
replicability and transparency
digital humanities

description: The sharing of resources (that is, data and tools) is a growing trend among researchers; it saves time throughout the data collection and subsequent analysis, and builds collaborations between scholars and disciplines. The field of Digital Humanities is, for the most part, made up of researchers who rely on existing data and tools for their analysis. However, simply making resources available alongside paper submission is not enough. The average researcher (i.e., one that is not fully proficient in computational methods) should also be able to understand the steps taken to build the dataset, and the mechanism of the method applied to process and analyse the data. That is particularly true for studies with language in use, as the way data is collected, prepared, queried and analysed varies greatly according to the register type, language variety, research questions, etc. Putting procedures in place is therefore paramount – it all comes down to transparency and a critical mindset. To illustrate our claim, we report on a case study applying topic modelling to the analysis of literary texts obtained from the Gutenberg Project. Using Jupyter Notebook (a web-based interactive environment that allows sharing live code and its documentation), we demonstrate how customization of the parameters throughout the whole process (e.g., data scraping, cleaning, tokenization rules, tagging, stopword selection, TM methods) affects the topic model output; and how that, in turn, can affect researcher interpretation. We argue that one way of achieving replicability and transparency is by offering, alongside the aforementioned resources, a guide that allows users to understand its mechanisms by reproducing its steps. We will also discuss how being aware (i.e., having sound knowledge of the process) is crucial for final data analysis and interpretation.
Naturalness in Type II seesaw model and implications for physical scalars
Creators: name: Chabab, Mohamed
name: Capdequi-Peyranère, Michel
name: Rahili, Larbi
Publisher: name: arXiv
Year: 2015
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: In this paper we consider a minimal extension to the standard model by a scalar triplet field with hypercharge $Y=2$. This model relies on the seesaw mechanism which provides a consistent explication of neutrino mass generation. We show from naturalness considerations that the Veltman condition is modified by virtue of the additional scalar charged states and that quadratic divergencies at one loop can be driven to zero within the allowed space parameter of the model, the latter is severely constrained by unitarity, boundedness from below and is consistent with the di-photon Higgs decay data of LHC. Furthermore, we analyse the naturalness condition effects to the masses of heavy Higgs bosons $H^0$, $A^0$, $H^\pm$ and $H^{\pm\pm}$, providing a drastic reduction of the ranges of variation of $m_{H^{\pm}}$ and $m_{H^{\pm\pm}}$ with an upper bounds at $288$ and $351$~GeV respectively, while predicting an almost degeneracy for the other neutral Higgs bosons $H^0$, $A^0$ at about $207$~GeV.
description: 20 pages, 4 figures, references added
Die jüdisch-christliche Philosophin Dr. Edith Stein angesichts vergessener Leidensgefährtinnen der NS-Zeit
Creators: name: Moll, Helmut
Publisher: name: Edith Stein Jahrbuch
Year: 2025

description: 1641946253
description: Edith Stein Jahrbuch, V. 23 (2017): Edith Stein Jahrbuch, Band 23
Hubbard band or oxygen vacancy states in the correlated electron metal SrVO$_3$?
Creators: name: Backes, S.
name: Rödel, T. C.
name: Fortuna, F.
name: Frantzeskakis, E.
name: Fèvre, P. Le
name: Bertran, F.
name: Kobayashi, M.
name: Yukawa, R.
name: Mitsuhashi, T.
name: Kitamura, M.
name: Horiba, K.
name: Kumigashira, H.
name: Saint-Martin, R.
name: Fouchet, A.
name: Berini, B.
name: Dumont, Y.
name: Kim, A. J.
name: Lechermann, F.
name: Jeschke, H. O.
name: Rozenberg, M. J.
name: Valentí, R.
name: Santander-Syro, A. F.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We study the effect of oxygen vacancies on the electronic structure of the model strongly correlated metal SrVO$_3$. By means of angle-resolved photoemission (ARPES) synchrotron experiments, we investigate the systematic effect of the UV dose on the measured spectra. We observe the onset of a spurious dose-dependent prominent peak at an energy range were the lower Hubbard band has been previously reported in this compound, raising questions on its previous interpretation. By a careful analysis of the dose dependent effects we succeed in disentangling the contributions coming from the oxygen vacancy states and from the lower Hubbard band. We obtain the intrinsic ARPES spectrum for the zero-vacancy limit, where a clear signal of a lower Hubbard band remains. We support our study by means of state-of-the-art ab initio calculations that include correlation effects and the presence of oxygen vacancies. Our results underscore the relevance of potential spurious states affecting ARPES experiments in correlated metals, which are associated to the ubiquitous oxygen vacancies as extensively reported in the context of a two-dimensional electron gas (2DEG) at the surface of insulating $d^0$ transition metal oxides.
description: Manuscript + Supplemental Material, 12 pages, 9 figures
Graines de cailloux
Creators: name: Cléaud, Muriel
Publisher: name: Zenodo
Year: 2023
Subjects: Conte jeune public
Maison des Minéraux
Géologie
Sable
Médiation scientifique

description: Conte jeune public. Des grains de sable racontent leurs histoires à une géologue et lui ouvrent les portes des phénomènes naturels fantastiques.
Making Open Science the "New Normal" in a Large and Diverse Institution: The Road so Far
Creators: name: Miller, Kerry
Publisher: name: Zenodo
Year: 2023

description: The University of Edinburgh is a member of the League of European Research Universities (LERU) and has adopted its 2018 paper Open Science and its role in universities: a roadmap for cultural change[1] as the basis for our own Open Research Roadmap[2]. This roadmap is owned by the university Library as many aspects of open research fall within our area of expertise, such as open access publishing and FAIR data. By developing this roadmap based on the LERU template we have been able to objectively evaluate our progress towards making Open Research the “new normal” across the university. Achieving the ambitions of our roadmap will take time and require fundamental cultural changes across our entire research community and those who support them. In areas such as FAIR data and open access publishing we are doing well with policies, support, and resources in place to ensure that all researchers can make their publications and data open if they choose to do so. We are also making good progress with Citizen Science as we have recruited a Participatory Research and Citizen Science Engagement Officer specifically to focus on this area. Other areas however present more of a challenge as they require changes to the ways in which researchers are trained in open research and recognised & rewarded for their efforts. Addressing these challenges successfully requires that the library works closely with other areas of the university who are responsible for research ethics, researcher training, recognition & reward, and more. This poster shows some of the progress we have made but more than that will look at the remaining challenges and how we plan to address them. I hope that it will open useful discussions with people from other institutions about how they are addressing these same challenges so that we can support and learn from each other. [1] LERU (2018), https://www.leru.org/publications/open-science-and-its-role-in-universities-a-roadmap-for-cultural-change#, accessed 14/04/2023 [2] University of Edinburgh (2023) https://www.ed.ac.uk/information-services/about/organisation/library-and-collections/open-research, accessed 14/04/2023
description: This poster was presented during the 4th Open Science Fair (25-27 September, Madrid, Spain)
Auf der Suche nach der »Harmonie«. Edith Stein und die Kunst
Creators: name: Maier, Elisabeth
Publisher: name: Edith Stein Jahrbuch
Year: 2025

description: 1641946202
description: Edith Stein Jahrbuch, V. 23 (2017): Edith Stein Jahrbuch, Band 23
Toward precision holography with supersymmetric Wilson loops
Creators: name: Faraggi, Alberto
name: Zayas, Leopoldo A. Pando
name: Silva, Guillermo A.
name: Trancanelli, Diego
Publisher: name: arXiv
Year: 2016
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We consider certain 1/4 BPS Wilson loop operators in SU(N) ${\cal N}=4$ supersymmetric Yang-Mills theory, whose expectation value can be computed exactly via supersymmetric localization. Holographically, these operators are mapped to fundamental strings in AdS5 x S5. The string on-shell action reproduces the large N and large coupling limit of the gauge theory expectation value and, according to the AdS/CFT correspondence, there should also be a precise match between subleading corrections to these limits. We perform a test of such match at next-to-leading order in string theory, by deriving the spectrum of quantum fluctuations around the classical string solution and by computing the corresponding 1-loop effective action. We discuss in detail the supermultiplet structure of the fluctuations. To remove a possible source of ambiguity in the ghost zero mode measure, we compare the 1/4 BPS configuration with the 1/2 BPS one, dual to a circular Wilson loop. We find a discrepancy between the string theory result and the gauge theory prediction, confirming a previous result in the literature. We are able to track the modes from which this discrepancy originates, as well as the modes that by themselves would give the expected result.
description: 5 pages; v2: 43 pages, long version fixing a mistake and altering the conclusions
Coherent Charge and Spin Density Waves in Underdoped HgBa$_{2}$CuO$_{4+δ}$
Creators: name: Lee, Jeongseop A.
name: Xin, Yizhou
name: Halperin, W. P.
name: Reyes, A. P.
name: Kuhns, P. L.
name: Chan, M. K.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: Various forms of spin and charge ordering have been identified in a wide range of cuprate superconducting materials, but whether these behaviors are ubiquitous phenomena is not established. In this work we focus on one of the simplest compounds, HgBa$_{2}$CuO$_{4+δ}$ (Hg1201), a superconductor with a high transition temperature, 97 K, having only a single layer and tetragonal structure, in contrast to one of the most extensively studied materials, YBa$_{2}$Cu$_{3}$O$_{6+y}$ (Y123). Using nuclear magnetic resonance we have discovered a coherent spatial modulation of both spin and charge that is temperature and magnetic field independent, in competition with superconductivity similar to other cuprates. However, there is no evidence for the magnetic field and temperature induced charge order observed in Y123. Electronic instabilities are a common feature of cuprates as in the present work on Hg1201, but their manifestations are not universal.
description: 5 pages, 6 figures, and supplementary materials
Structure of the catalytic sites in Fe/N/C-catalysts for O-2-reduction in PEM fuel cells
Creators: name: Kramm, Ulrike I.
name: Herranz, Juan
name: Larouche, Nicholas
name: Arruda, Thomas M.
name: Lefèvre, Michel
name: Jaouen, Frédéric
name: Bogdanoff, Peter
name: Fiechter, Sebastian
name: Abs-Wurmbach, Irmgard
name: Mukerjee, Sanjeev
name: Dodelet, Jean-Pol
Publisher: name: Technische Universität Berlin
Year: 2012
Subjects: subject: 540 Chemie und zugeordnete Wissenschaften

description: Dieser Beitrag ist mit Zustimmung des Rechteinhabers aufgrund einer (DFG geförderten) Allianz- bzw. Nationallizenz frei zugänglich.
description: This publication is with permission of the rights owner freely accessible due to an Alliance licence and a national licence (funded by the DFG, German Research Foundation) respectively.
description: Fe-based catalytic sites for the reduction of oxygen in acidic medium have been identified by 57Fe Mössbauer spectroscopy of Fe/N/C catalysts containing 0.03 to 1.55 wt% Fe, which were prepared by impregnation of iron acetate on carbon black followed by heat-treatment in NH3 at 950 °C. Four different Fe-species were detected at all iron concentrations: three doublets assigned to molecular FeN4-like sites with their ferrous ions in a low (D1), intermediate (D2) or high (D3) spin state, and two other doublets assigned to a single Fe-species (D4 and D5) consisting of surface oxidized nitride nanoparticles (FexN, with x ≤ 2.1). A fifth Fe-species appears only in those catalysts with Fe-contents ≥0.27 wt%. It is characterized by a very broad singlet, which has been assigned to incomplete FeN4-like sites that quickly dissolve in contact with an acid. Among the five Fe-species identified in these catalysts, only D1 and D3 display catalytic activity for the oxygen reduction reaction (ORR) in the acid medium, with D3 featuring a composite structure with a protonated neighbour basic nitrogen and being by far the most active species, with an estimated turn over frequency for the ORR of 11.4 e− per site per s at 0.8 V vs. RHE. Moreover, all D1 sites and between 1/2 and 2/3 of the D3 sites are acid-resistant. A scheme for the mechanism of site formation upon heat-treatment is also proposed. This identification of the ORR-active sites in these catalysts is of crucial importance to design strategies to improve the catalytic activity and stability of these materials.
North American Studies Portal Project. CISAN and OpenAIRE: creating synergies beyond borders
Creators: name: Bardi, Alessia
name: Manzanera Silva, Norma Aida
Publisher: name: Zenodo
Year: 2023

description: In the current scholarly communication ecosystem, it is not an easy task to apply Open Science principles and to keep the diverse types of research outputs visible, easily discoverable and connected. Thanks to the collaboration with OpenAIRE, a European non-profit organization that promotes the implementation of Open Science, the Center for Research on North America (CISAN, http://www.cisan.unam.mx/) set up the North American Studies Portal (https://north-american-studies.openaire.eu/). The research area of North American Studies is multidisciplinary and cross-boundary, involving researchers and academics from different geographic locations and with different expertise. Consequently, research outputs are scattered across different repositories and the research community was lacking a single access point where all the diverse research production could be found. CISAN wanted to address this gap and identified the OpenAIRE CONNECT service (https://connect.openaire.eu) as a suitable solution for the creation of a thematic web portal that is sustainable, easy to manage and highly configurable. Thanks to OpenAIRE CONNECT, CISAN benefits from the OpenAIRE infrastructure and the OpenAIRE Graph (https://graph.openaire.eu), an open, de-duplicated, participatory metadata research graph of more than 200 millions interlinked scientific products collected from more than 2,000 scholarly data sources worldwide. The North American Studies Portal was set up as a CONNECT gateway that acts as unique access point for all North American Studies research outcomes. CISAN customizes the gateway and ensures that it has been set up appropriately to include relevant metadata records from those available in the OpenAIRE Graph, profiling the research area of North American Studies through text mining applications, targeted harvesting of content providers and specific projects, and identification of research topics to enable specific discovery. The North American Studies Portal is the natural environment to embrace the purposes of the International Network of North American Studies (REDAN), its communication and outreach needs: Global opening, which enhances visibility and impact. Automatic update through OpenAIRE Research Graph of new data sources, new semantics, and new users. Guaranteed compatibility through an API to link services with Zenodo, ORCID, and OpenAIRE Research Graph. Design of user interface like MiCISAN and CISAN, thereby preserving the institutional image. Immediate knowledge of new user subscriptions, or updated or new information from different data sources, through automated notifications. Provision of statistics on views, downloads, and use to determine the practices in Open Science. Among the 21 public OpenAIRE CONNECT gateways, the North American Studies Portal is the first with an origin out of Europe.
description: This poster was presented during the 4th Open Science Fair (25-27 September, Madrid, Spain)
Molecular gas kinematics within the central 250 pc of the Milky Way
Creators: name: Henshaw, J. D.
name: Longmore, S. N.
name: Kruijssen, J. M. D.
name: Davies, B.
name: Bally, J.
name: Barnes, A.
name: Battersby, C.
name: Burton, M.
name: Cunningham, M. R.
name: Dale, J. E.
name: Ginsburg, A.
name: Immer, K.
name: Jones, P. A.
name: Kendrew, S.
name: Mills, E. A. C.
name: Molinari, S.
name: Moore, T. J. T.
name: Ott, J.
name: Pillai, T.
name: Rathborne, J.
name: Schilke, P.
name: Schmiedeke, A.
name: Testi, L.
name: Walker, D.
name: Walsh, A.
name: Zhang, Q.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: Using spectral-line observations of HNCO, N2H+, and HNC, we investigate the kinematics of dense gas in the central ~250 pc of the Galaxy. We present SCOUSE (Semi-automated multi-COmponent Universal Spectral-line fitting Engine), a line fitting algorithm designed to analyse large volumes of spectral-line data efficiently and systematically. Unlike techniques which do not account for complex line profiles, SCOUSE accurately describes the {l, b, v_LSR} distribution of CMZ gas, which is asymmetric about Sgr A* in both position and velocity. Velocity dispersions range from 2.6 km/s28. The gas is distributed throughout several "streams", with projected lengths ~100-250 pc. We link the streams to individual clouds and sub-regions, including Sgr C, the 20 and 50 km/s clouds, the dust ridge, and Sgr B2. Shell-like emission features can be explained by the projection of independent molecular clouds in Sgr C and the newly identified conical profile of Sgr B2 in {l ,b, v_LSR} space. These features have previously invoked supernova-driven shells and cloud-cloud collisions as explanations. We instead caution against structure identification in velocity-integrated emission maps. Three geometries describing the 3-D structure of the CMZ are investigated: i) two spiral arms; ii) a closed elliptical orbit; iii) an open stream. While two spiral arms and an open stream qualitatively reproduce the gas distribution, the most recent parameterisation of the closed elliptical orbit does not. Finally, we discuss how proper motion measurements of masers can distinguish between these geometries, and suggest that this effort should be focused on the 20 km/s and 50 km/s clouds and Sgr C.
description: Accepted for publication in MNRAS. 30 pages (including appendices), 22 figures, 3 tables. This updated version includes minor corrections (including typos and updated references). SCOUSE is available for download at https://github.com/jdhenshaw/SCOUSE. A selection of PPV movies can be downloaded at https://github.com/jdhenshaw/PPV_movies
Two-phase Cryogenic Avalanche Detector with electroluminescence gap operated in argon doped with nitrogen
Creators: name: Bondar, A.
name: Buzulutskov, A.
name: Dolgov, A.
name: Nosov, V.
name: Shekhtman, L.
name: Shemyakina, E.
name: Sokolov, A.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Instrumentation and Detectors (physics.ins-det)
subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: A two-phase Cryogenic Avalanche Detector (CRAD) with electroluminescence (EL) gap, operated in argon doped with a minor (49$\pm$7 ppm) admixture of nitrogen, has been studied. The EL gap was optically read out using cryogenic PMTs located on the perimeter of the gap. We present the results of the measurements of the N$_2$ content, detector sensitivity to X-ray-induced signals, EL gap yield and electron lifetime in the liquid. The detector sensitivity, at a drift field in liquid Ar of 0.6 kV/cm, was measured to be 9 and 16 photoelectrons recorded at the PMTs per keV of deposited energy at 23 and 88 keV respectively. Such two-phase detectors, with enhanced sensitivity to the S2 (ionization-induced) signal, are relevant in the field of argon detectors for dark matter search and low energy neutrino detection.
description: 4 pages, 5 figures. Presented at Vienna Conference of Instrumentation (2016). To be published in Nucl. Instr. Meth. A
Gamma-ray and optical oscillations in the blazar PKS 0537-441
Creators: name: Sandrinelli, Angela
name: Covino, Stefano
name: Treves, Aldo
Publisher: name: arXiv
Year: 2015
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: We have considered the \textit{Fermi} $γ$-ray light curve of the blazar PKS 0537-441 during a high state extending from 2008/08/10 to 2011/08/27. The periodogram exhibits a peak at T $\sim$ 280 d, with a significance of $\sim$ 99.7 \%. A peak of similar relevance at $\frac{1}{2}$ T is found in the optical light curves. Considering the entire duration of the \textit{ Fermi} light curve 2008-2015, no significant peak is revealed, while the optical one remains meaningful. Comparing with recent observations of PKS 2155-304 and PG 1553+113 it seems that month-year oscillations can characterize some blazars. Month-scale oscillations can also show up only during phases of enhanced or bursting emission like in the case of PKS 0537-441.
description: 7 pages, 6 figures, accepted for publication in The Astrophysical Journal
title: American space, American place: Edward Hopper, painting and his personal vision of modern America
Creators: name: Easterbrook, Carolyn Louise
Publisher: name: University of Kent
Year: 2022

description: Edward Hopper is generally acknowledged as an exemplary ‘American Scene’ painter and his work is understood to be a reflection of the loneliness of the modern city. This thesis confirms the emphasis of the American subject matter in Hopper’s work and considers it with particular reference to the American city, focussing on the depiction of the human figure, especially the female figure. This is central to Hopper’s work even when its presence is only implied. This study concentrates on works from Hopper’s ‘mature’ period, which I see as beginning around 1924. The first section is a detailed examination of the human figure in relation to three specific areas: the female nude, the solitary figure, and Hopper’s couples and groups, with the emphasis on their American context. The second section of the thesis focuses on the depiction of the human figure in relation to the American city, predominantly the Greenwich Village area of New York City, through the detailed study of specific environments: the office, the automat and the diner, the theater/movie theatre and the apartment building. Hopper’s figures are considered in light of various art forms, notably Film Noir and the depiction of the female figure in advertising and the American ‘pin-up’, particularly in relation to the influential role of Hopper’s early career as a commercial illustrator. They are also assessed in terms of the personal life of the artist, and the affect that his marriage had upon his perception and depiction of the female figure. Hopper’s depiction of light is of crucial importance across his oeuvre, which instead of being examined specifically, is discussed where pertinent. These elements combine within his paintings to reveal his portrayal of the human condition, and by tracing the development of his images through the reductive process of composition employed in his mature works, his very personal vision of modern America is revealed. This culminates in the depiction of sunlight in an empty room: his ultimate enigmatic ‘statement’ of being.
Determination of reddening and age for ten Large Magellanic Cloud star clusters from integrated spectroscopy
Creators: name: Ahumada, Andrea V.
name: Vega, Luis R.
name: Clariá, Juan J.
name: Oddone, Mónica A.
name: Palma, Tali
Publisher: name: arXiv
Year: 2016
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: We present flux-calibrated integrated spectra in the optical range (3700-6800 Å) obtained at Complejo Astronómico El Leoncito (CASLEO, Argentina) for a sample of 10 concentrated star clusters belonging to the Large Magellanic Cloud (LMC). No previous data exist for two of these objects (SL 142 and SL 624), while most of the remaining clusters have been only poorly studied. We derive simultaneously foreground $E(B-V)$ reddening values and ages for the cluster sample by comparing their integrated spectra with template LMC cluster spectra and with two different sets of simple stellar population models. Cluster reddening values and ages are also derived from both available interstellar extinction maps and by using diagnostic diagrams involving the sum of equivalent widths of some selected spectral features and their calibrations with age, respectively. For the studied sample, we derive ages between 1 Myr and 240 Myr. In an effort to create a spectral library at the LMC metallicity level with several clusters per age range, the cluster sample here presented stands out as a useful complement to previous ones.
description: 38 pages, 9 figueres, 5 tables. Accepted for publication in PASP
Open Access Publishing in Astronomy - a Snapshot
Creators: name: Grothkopf, Uta
name: Meakins, Silvia
name: Escarlate, Nathalia
name: Kiefer. Leslie
Publisher: name: Zenodo
Year: 2023

description: We present an overview of Open Access publishing in astronomy. After a brief introduction to the wide-ranging read-access and the core journals in astronomy, we provide a viewgraph of publishing options in the OA era, including Green OA, Gold OA, Diamond OA, and the Rights Retention Strategy. Pros and cons of each model are explained, and the current status of major astronomy journals is described and evaluated. In conclusion, we strongly promote the implementation of fair, transparent, collaborative, and equitable Open Access models. A main driver of the OA movement is to enable fair access to publications in a cost neutral way. Regrettably, most (commercial) publishers see APC-based OA as the most promising option to secure their business, which often results in higher costs than before, favours authors from wealthy organisations, is disruptive for authors, and leads to currently unanswered ethical questions regarding the distribution of available publishing budgets, such as who can publish, in which journals, how often, up to which costs? In contrast to the APC-based business model, collaborative OA models, for instance Subscribe to Open (S2O), exist. The authors of the poster argue that we must avoid a new dependancy on high-price commercial publishers and strive for transparent, equitable, sustainable, and inclusive models. Open Access constitutes a paradigm shift in scholarly communication — we must find fair and equitable OA models now, or else we risk that three decades of work in favour of Open Access merely result in a new dependency on commercial publishers. The poster shows the many issues arising from APC-based OA models and emphasises the existence of better approaches in order to achieve global Open Access. Addressing all conference participants, but in particular librarians and researchers, we consider it of utmost importance that the community does not accept the current dominance of publisher-defined APC-based models prematurely. Librarians make strategic choices when enabling Open Access, and this strategic position should be used in order to strive for a collaborative, equitable, and sustainable publishing landscape.
description: This poster was presented during the 4th Open Science Fair (25-27 September, Madrid, Spain)
The dielectric signature of poly(N-isopropylacrylamide) microgels at the volume phase transition: dependence on the crosslinking density
Creators: name: Füllbrandt, Marieke
name: Klitzing, Regine Von
name: Schönhals, Andreas
Publisher: name: Technische Universität Berlin
Year: 2013
Subjects: subject: 530 Physik

description: Dieser Beitrag ist mit Zustimmung des Rechteinhabers aufgrund einer (DFG geförderten) Allianz- bzw. Nationallizenz frei zugänglich.
description: This publication is with permission of the rights owner freely accessible due to an Alliance licence and a national licence (funded by the DFG, German Research Foundation) respectively.
description: Temperature sensitive poly(N-isopropylacrylamide) (pNIPAM) microgels are prepared and investigated using dielectric spectroscopy in a frequency range from 10−1 Hz to 106 Hz at temperatures from 15 °C to 50 °C. The microgels were synthesized with different crosslinker molar ratios resulting in microgels with structural differences. From the dielectric response of the pNIPAM microgels the swelling/deswelling behaviour is monitored by both the temperature (T) and the frequency (f) dependence of the conductivity spectra σ*(f, T). The volume phase transition (VPT) at the lower critical solution temperature (LCST) is deduced by a change in the T-dependence of the DC conductivity σ′DC. It can be explained by a decrease in the effective charge mobility and a reduction in the effective charge number contributing to σ′DC at T > LCST. Addressing the f-dependence of the real part of the conductivity σ′, a pronounced frequency dependence at temperatures above the LCST can be observed whereas at temperatures below the LCST the conductivity spectra resemble that of the pure solvent (water) which is frequency independent. The f-dependence of σ′ at T > LCST is assigned to the collapse of the microgel particles. At the interfaces of the collapsed particles charge carriers are blocked and/or entrapped giving rise to Maxwell–Wagner–Sillars (MWS) polarization effects. The dependence of the MWS effect on the crosslinker amount is studied in detail and conclusions concerning the internal structure of the microgels with respect to their crosslinking density are drawn. Moreover the dielectric data are related to dynamic light scattering data. A correlation between the MWS polarization effect and the swelling/deswelling ratio expressed by the hydrodynamic radius Rh at different temperatures is established for the first time.
Terephthalonitrile-derived nitrogen-rich networks for high performance supercapacitors
Creators: name: Hao, Long
name: Luo, Bin
name: Li, Xianglong
name: Jin, Meihua
name: Fang, Yan
name: Tang, Zhihong
name: Jia, Yuying
name: Liang, Minghui
name: Thomas, Arne
name: Yang, Junhe
name: Zhi, Linjie
Publisher: name: Technische Universität Berlin
Year: 2012
Subjects: subject: 690 Hausbau, Bauhandwerk

description: Dieser Beitrag ist mit Zustimmung des Rechteinhabers aufgrund einer (DFG geförderten) Allianz- bzw. Nationallizenz frei zugänglich.
description: This publication is with permission of the rights owner freely accessible due to an Alliance licence and a national licence (funded by the DFG, German Research Foundation) respectively.
description: A novel high performance electrode material for supercapacitor applications, terephthalonitrile-derived nitrogen-rich network (TNN), is developed successfully via temperature-dependent cross-linking of terephthalonitrile monomers. This work opens up a new window for seeing a versatile modular toolbox derived from various aromatic nitrile monomers for developing better electrode materials in the future.
Evolved stars as donors in symbiotic binaries
Creators: name: Skopal, A.
name: Sekeras, M.
name: Shagatova, N.
Publisher: name: arXiv
Year: 2015
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: This contribution is focused on the role of cool giants in symbiotic binaries. Especially, we pay attention to their mass-loss rates and the wind mass-transfer onto their compact accretors.
description: 4 pages, 2 figures, published in the proceedings from the conference: "The Physics of Evolved Stars: A Conference Dedicated to the Memory of Olivier Chesneau"
Constraints On Holographic Cosmological Models From Gamma Ray Bursts
Creators: name: Rivera, Alexander Bonilla
name: Hernandez, Jairo Ernesto Castillo
Publisher: name: arXiv
Year: 2016
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: We use Gamma Ray Bursts (GRBs) data from Y. Wang (2008) to put additional constraints on a set of cosmological dark energy models based on the holographic principle. GRBs are among the most complex and energetic astrophysical events known in the universe offering us the opportunity to obtain information from the history of cosmic expansion up to about redshift of $z\sim 6$. These astrophysical objects provide us a complementary observational test to determine the nature of dark energy by complementing the information of data from Supernovas (e.g. Union 2.1 compilation). We found that the $ΛCDM$ model gives the best fit to the observational data, although our statistical analysis ($ΔAIC$ and $ΔBIC$) shows that the models studied in this work ("Hubble Radius Scale" and "Ricci Scale Q") have a reasonable agreement with respect to the most successful, except for the "Ricci Scale CPL" and "Future Event Horizon" models, which can be ruled out by the present study. However, these results reflect the importance of GRBs measurements to provide additional observational constraints to alternative cosmological models, which are mandatory to clarify the way in which the paradigm of dark energy or any alternative model is correct.
description: 11 pages, 6 figures, 7 tables, poster presentation: Congreso Nacional de F\'isica, Manizales, Caldas, Colombia, 2015
Andreev Bound States in Superconducting Films and Confined Superfluid He-3
Creators: name: Vorontsov, Anton B.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: This paper reviews the confinement-driven phase transitions, and the prediction of superfluid phases with broken time-reversal or translational symmetry in thin films. The new phases are a result of particle-hole coherent Andreev scattering processes that create quasiparticle states with energies inside the superconducting gap. These states cause profound restructuring of the low-energy spectrum in the surface region of several coherence lengths $ξ_0$ with large spatial variations of the superconducting order parameter. In confined geometry, such as slabs, films, pores, or nano-dots, with one or more physical dimensions $D \sim 10ξ_0$, Andreev bound states can dominate properties of the superfluid phases, leading to modified experimental signatures. They can dramatically change the energy landscape, and drive transitions into new superfluid phases, that are typically unstable in the bulk superfluid. On the examples of single-component singlet d-wave superconductor, and triplet multi-component superfluid $^3$He I show how properties of condensed phases in restricted geometry depend on the order parameter structure. I will highlight the connection between Andreev bound states and confinement-stabilized phases with additional broken symmetries, describe recent progress and open questions in theoretical and experimental investigation of superfluids in confined geometry.
description: 25 pages, 9 figures
Optimal time lags from causal prediction model help stratify and forecast nervous system pathology
Creators: name: Bermperidis, Theodoros
Publisher: name: No Publisher Supplied
Year: 2022

description: Traditional clinical approaches diagnose disorders of the nervous system using standardized observational criteria. Although aiming for homogeneity of symptoms, this method often results in highly heterogeneous disorders. A standing question thus is how to automatically stratify a given random cohort of the population, such that treatment can be better tailored to each cluster’s symptoms, and severity of any given group forecasted to provide neuroprotective therapies. In this work we introduce new methods to automatically stratify a random cohort of the population composed of healthy controls of different ages and patients with different disorders of the nervous systems. Using a simple walking task and measuring micro-fluctuations in their biorhythmic motions, we combine non-linear causal network connectivity analyses in the temporal and frequency domains with stochastic mapping. The methods define a new type of internal motor timings. These are amenable to create personalized clinical interventions tailored to self-emerging clusters signaling fundamentally different types of gait pathologies. We frame our results using the principle of reafference and operationalize them using causal prediction, thus renovating the theory of internal models for the study of neuromotor control.
Sparsity in Dynamics of Spontaneous Subtle Emotions: Analysis \& Application
Creators: name: Ngo, Anh Cat Le
name: See, John
name: Phan, Raphael Chung-Wei
Publisher: name: arXiv
Year: 2016
Subjects: subject: Computer Vision and Pattern Recognition (cs.CV)
subject: FOS: Computer and information sciences

description: Spontaneous subtle emotions are expressed through micro-expressions, which are tiny, sudden and short-lived dynamics of facial muscles; thus poses a great challenge for visual recognition. The abrupt but significant dynamics for the recognition task are temporally sparse while the rest, irrelevant dynamics, are temporally redundant. In this work, we analyze and enforce sparsity constrains to learn significant temporal and spectral structures while eliminate irrelevant facial dynamics of micro-expressions, which would ease the challenge in the visual recognition of spontaneous subtle emotions. The hypothesis is confirmed through experimental results of automatic spontaneous subtle emotion recognition with several sparsity levels on CASME II and SMIC, the only two publicly available spontaneous subtle emotion databases. The overall performances of the automatic subtle emotion recognition are boosted when only significant dynamics are preserved from the original sequences.
description: IEEE Transaction of Affective Computing (2016)
Delocalization at small energy for heavy-tailed random matrices
Creators: name: Bordenave, Charles
name: Guionnet, Alice
Publisher: name: arXiv
Year: 2016
Subjects: subject: Probability (math.PR)
subject: Mathematical Physics (math-ph)
subject: FOS: Mathematics
subject: FOS: Physical sciences

description: We prove that the eigenvectors associated to small enough eigenvalues of an heavy-tailed symmetric random matrix are delocalized with probability tending to one as the size of the matrix grows to infinity. The delocalization is measured thanks to a simple criterion related to the inverse participation ratio which computes an average ratio of L4 and L2-norms of vectors. In contrast, as a consequence of a previous result, for random matrices with sufficiently heavy tails, the eigenvectors associated to large enough eigenvalues are localized according to the same criterion. The proof is based on a new analysis of the fixed point equation satisfied asymptotically by the law of a diagonal entry of the resolvent of this matrix.
description: 47 pages
Screening and Many-Body Effects in Two-Dimensional Crystals: Monolayer MoS$_{2}$
Creators: name: Qiu, Diana Y.
name: da Jornada, Felipe H.
name: Louie, Steven G.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: We present a systematic study of the variables affecting the electronic and optical properties of two-dimensional(2D) crystals within \textit{ab initio} GW and GW plus Bethe Salpeter Equation (GW-BSE) calculations. As a prototypical 2D transition metal dichalcogenide material, we focus our study on monolayer MoS${}_2$. We find that the reported variations in GW-BSE results in the literature for monolayer MoS${}_2$ and related systems arise from different treatments of the long-range Coulomb interaction in supercell calculations and convergence of k-grid sampling and cutoffs for various quantities such as the dielectric screening. In particular, the quasi-2D nature of the system gives rise to fast spatial variations in the screening environment, which are computationally challenging to resolve. We also show that common numerical treatments to remove the divergence in the Coulomb interaction can shift the exciton continuum leading to false convergence with respect to k-point sampling. Our findings apply to GW-BSE calculations on any low-dimensional semiconductors.
การส่งเสริมสิทธิชุมชนในการแก้ไขปัญหาคนกับช้างป่าในเขตรักษาพันธุ์สัตว์ป่าภูหลวงขององค์กรปกครองส่วนท้องถิ่น
Creators: name: ยุทธพล เดชารัตนชาติ
Publisher: name: สถาบันวิจัยและพัฒนา มหาวิทยาลัยราชภัฏเลย
Year: 2566
Subjects: องค์กรปกครองส่วนท้องถิ่น
การส่งเสริมสิทธิชุมชน
ปัญหาคนกับช้างป่า

description: วารสารวิจัยและพัฒนา มหาวิทยาลัยราชภัฏเลย, 18, 65, 1
กลยุทธ์ส่งเสริมการตลาดที่มีผลต่อกระบวนการตัดสินใจซื้อรถยนต์มือสอง ในยุควิถีใหม่ของผู้ซื้อจังหวัดเลย
Creators: name: รวัฒน์ มันทรา
Publisher: name: สถาบันวิจัยและพัฒนา มหาวิทยาลัยราชภัฏเลย
Year: 2566
Subjects: การตัดสินใจ
รถยนต์มือสอง
กลยุทธ์ส่งเสริมการตลาด
ยุควิถีใหม่

description: วารสารวิจัยและพัฒนา มหาวิทยาลัยราชภัฏเลย, 18, 65, 13
ความสัมพันธ์ระหว่างการส่งเสริมการตลาดกับการตัดสินใจซื้อเฟอร์นิเจอร์สำนักงานของตัวแทนจำหน่ายในภาคกลาง บริษัท เอบีซี จำกัด
Creators: name: ธันยธร สมบูรณ์
Publisher: name: สถาบันวิจัยและพัฒนา มหาวิทยาลัยราชภัฏเลย
Year: 2566
Subjects: การส่งเสริมการตลาด
การตัดสินใจซื้อ
เฟอร์นิเจอร์สำนักงาน

description: วารสารวิจัยและพัฒนา มหาวิทยาลัยราชภัฏเลย, 18, 65, 25