cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Grammar Teaching and Digital Learning Didactics with Creativity and Gender
Creators: name: Lopes, Ana Sofia
name: Morgado, Celda
Publisher: name: Sensos-e
Year: 2019

description: In language teaching, the use of information and communication technologies (ICT) have positive implications, because these are a pedagogical strategy to develop the components of text comprehension and these are a contribution to the grammar teaching. If today technologies are part of children's daily lives, teachers can not ignore the challenges that this digital generation brings, and should make didactic use of ICT. Thus, a didactic sequence was developed in the 3rd grade of the Primary School, in which ICT contributed to linguistic reflection and comprehension around verbal situations and grammatical gender. The goal of the sequence was the construction of a digital book composed of texts about imaginary animals resulting from a mixture of different texts and a script of linguistic comprehension and reflection, in which the students classified the verbal situations expressed by the verbs used in the texts. The students proceeded to assign the sex of the animals originated from the mixture of texts. The data gathered reinforced that the study of verbal situations contributes to the development of reading comprehension, that there is a confusion between grammatical gender and biological sex, and that the use of ICT are a motivational factor in teaching and learning processes.
description: Sensos-e, Vol 6 No 2 (2019): INW2019
Forecasting the SST space-time variability of the Alboran Sea with genetic algorithms
Creators: name: Alvarez, Alberto
name: Lopez, Cristobal
name: Riera, Margalida
name: Hernandez-Garcia, Emilio
name: Tintore, Joaquin
Publisher: name: arXiv
Year: 1999
Subjects: subject: Chaotic Dynamics (nlin.CD)
subject: Atmospheric and Oceanic Physics (physics.ao-ph)
subject: FOS: Physical sciences

description: We propose a nonlinear ocean forecasting technique based on a combination of genetic algorithms and empirical orthogonal function (EOF) analysis. The method is used to forecast the space-time variability of the sea surface temperature (SST) in the Alboran Sea. The genetic algorithm finds the equations that best describe the behaviour of the different temporal amplitude functions in the EOF decomposition and, therefore, enables global forecasting of the future time-variability.
description: 15 pages, 3 figures; latex compiled with agums.sty
Método de Polya e problemas verbais: estratégias de linearização sintático-semânticas
Creators: name: Monteiro, Inês Trindade
name: Mascarenhas, Daniela Filipa Martinho
name: Morgado, Celda
Publisher: name: Sensos-e
Year: 2019

description: Neste artigo, apresentar-se-ão resultados parciais de uma investigação que recaiu sobre a compreensão de problemas verbais e a aplicação do método de Polya, no 4.º ano/1.ºCEB.A investigação desenvolveu-se segundo duas questões-problema: O domínio das competências de compreensão na Leitura influencia a resolução de problemas?; Que contributo poderá ter, para os alunos, o conhecimento do método de Polya e de diferentes estratégias na resolução de problemas verbais de dois ou mais passos?. Seguiu a metodologia de investigação-ação, com abordagem mista. Aplicou-se um teste com duas versões: v.A, três problemas verbais extraídos das Provas de Aferição (2015); v.B, os mesmos problemas adaptados semântica e sintaticamente. Fases: aplicação do (pré-)teste; intervenção, incidindo na articulação das fases do método de Polya com as componentes da compreensão na leitura e no ensino de estratégias de compreensão na resolução de problemas verbais; reaplicação do (pós-)teste. Apresentaremos apenas os dados relativos aos problemas com alterações semânticas. Os resultados do pós-teste foram superiores aos do pré-teste: no problema1, na v.B a média subiu 0.45 pontos; no problema3, na v.A 0.94 e na v.B 1.29. Demonstrar-se-á a importância de uma aprendizagem articulada, visto que a língua materna é o veículo de comunicação no ensino da Matemática.
description: Sensos-e, Vol 6 No 2 (2019): INW2019
Study of the Phase Diagram and the Tc Pressure Dependence for HgBaCuO Superconductors
Creators: name: de Mello, E. V. L.
name: Acha, C.
Publisher: name: arXiv
Year: 1997
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: We apply a method recently derived based on the extended Hubbard Hamiltonian and the BCS approach to obtain the superconducting critical temperature dependence with carrier density for the HgBaCuO compounds. We show that this procedure can be used to study pressure effect with the assumption that pressure changes the supercondutor gap. The results reproduce well the experimental data for the whole doping regime and the high and low pressure dependence.
description: 2 pages and 2 figs., paper to be presented at M2S-HTSC-V and to be published in the proceedings by Physica C
Sciences à l’école : quelles intentions de l’enseignant pour quels savoirs ?
Creators: name: BLAT, MURIEL
name: BOILEVIN, JEAN-MARIE
name: MARZIN-JANVIER, PATRICIA
Publisher: name: Mediterranean Journal of Education
Year: 2021
Subjects: Inquiry based learning and teaching, primary school, intentions, scheme, conceptual knowledge

description: This study aims to better understand how experienced school teachers think about, organize, control and guide an inquiry-based science teaching-learning situation. The framework of conceptualization in action, complemented by a dynamic model of intentions, allows us to uncover the intentions underlying the preparations for each session, and to identify the cues taken into account by each teacher to actualize these intentions in the classroom situation. Our methodological tools are borrowed from the ergonomic approaches of work psychology and the results presented in this paper target the didactic intentions related to the knowledge at stake.
description: Mediterranean Journal of Education, Vol. 1, N. 2 (2021) - Colloque SIEST Méditerranée 7
Formas de socialización y clasificación de la diversidad en la escuela
Creators: name: Barroso, Rut Barranco
name: López, Roberto Moreno
name: Pueyo, Marta Venceslao
Publisher: name: Sensos-e
Year: 2019

description: El presente texto plantea cuestiones vinculadas con las formas de construcción de la identidad en educación. Para abordarlo, apostamos por una lectura educativa del tema a partir de tres grandes autores: Durkeim, Geerzt y Corcuff. Autores que, desde distintas perspectivas, han tratado el concepto de la socialización y construcción de la identidad (subjetiva o asignada). El pensar la diversidad y las acciones educativas que de ahí se derivan, es a día de hoy, una de las cuestiones más debatidas y que más controversias suscita en el sistema educativo. Las aportaciones realizadas por estos autores son, en muchos casos, tomadas como argumentos para decidir qué hacer o no hacer, qué permitir o prohibir, enseñar o silenciar en la escuela de hoy. Aunque en la institución educativa impera el pensamiento de Geerzt (al menos en apariencia), las actuaciones del día a día, podríamos interpretarlas según el modelo durkheimiano. Es, desde esta contradicción, que intentamos confrontar las ideas de estos autores (apoyándonos también en las aportaciones de Corcuff) y tomando la idea de socialización como eje central de este texto.
description: Sensos-e, Vol 6 No 2 (2019): INW2019
Linear and nonlinear time series analysis of the black hole candidate Cygnus X-1
Creators: name: Timmer, J.
name: Schwarz, U.
name: Voss, H. U.
name: Wardinski, I.
name: Belloni, T.
name: Hasinger, G.
name: van der Klis, M.
name: Kurths, Juergen
Publisher: name: arXiv
Year: 1999
Subjects: subject: Chaotic Dynamics (nlin.CD)
subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We analyze the variability in the X-ray lightcurves of the black hole candidate Cygnus X-1 by linear and nonlinear time series analysis methods. While a linear model describes the over-all second order properties of the observed data well, surrogate data analysis reveals a significant deviation from linearity. We discuss the relation between shot noise models usually applied to analyze these data and linear stochastic autoregressive models. We debate statistical and interpretational issues of surrogate data testing for the present context. Finally, we suggest a combination of tools from linear andnonlinear time series analysis methods as a procedure to test the predictions of astrophysical models on observed data.
description: 15 pages, to appear in Phys. Rev. E
Constraining the Galactic Bar Parameters with Red Clump Giants
Creators: name: Mao, Shude
name: Paczynski, Bohdan
Publisher: name: arXiv
Year: 2002
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We show that the small intrinsic spread in luminosities of red clump giants can be used to constrain the differences in the streaming motions of Galatic bulge stars on the near side and those on the far side. We propose two methods to select two samples with one preferentially on the near side and the other on the far side. In the first method, we divide red clump giants into a bright sample and a faint one; stars in the bright sample will be on average more on the near side and vice versa. The second method relies on the fact that lensed bulge stars lie preferentially on the far side due to the enhanced lensing probability by the stars on the near side and in the disk. If the radial streaming motion is ~50km/s, we find the difference in the average radial velocity between the bright and faint samples can reach ~33km/s while the corresponding difference is about ~10km/s between the lensed stars and all observed stars. The difference in the average proper motion between the bright and faint samples is about ~1.6mas/yr if there is a tangential streaming motion of 100km/s; the corresponding shift between the lensed stars and all observed stars is ~1mas/yr. To observe the shifts in the radial velocity and proper motion, roughly one hundred microlensing events, and/or bright/faint red clump giants, need to be observed either spectroscopically or astrometrically. The spectroscopic observations can be performed efficiently using multi-object spectrographs already available. The proper motion signature of microlensed objects can be studied using ground-based telescopes and HST. These observations will provide strong constraints on the Galactic bar parameters (abridged).
description: MNRAS, 13 pages, very minor revision
A Surveillance Infrastructure for Malaria Analytics: Provisioning Data Access and Preservation of Interoperability
Creators: name: Manir, Mohammad Sadnan Al
name: Brenas, Jon Haël
name: Baker, Christopher JO
name: Shaban-Nejad, Arash
Publisher: name: arXiv
Year: 2019
Subjects: subject: Computers and Society (cs.CY)
subject: FOS: Computer and information sciences

description: We propose the Semantics, Interoperability, and Evolution for Malaria Analytics (SIEMA) platform for use in malaria surveillance based on semantic data federation. Using this approach, it is possible to access distributed data, extend and preserve interoperability between multiple dynamic distributed malaria sources, and facilitate detection of system changes that can interrupt mission-critical global surveillance activities. We used Semantic Automated Discovery and Integration (SADI) Semantic Web Services to enable data access and improve interoperability, and the graphical user interface-enabled semantic query engine HYDRA to implement the target queries typical of malaria programs. We implemented a custom algorithm to detect changes to community-developed terminologies, data sources, and services that are core to SIEMA. This algorithm reports to a dashboard. Valet SADI is used to mitigate the impact of changes by rebuilding affected services. We developed a prototype surveillance and change management platform from a combination of third-party tools, community-developed terminologies, and custom algorithms. We illustrated a methodology and core infrastructure to facilitate interoperable access to distributed data sources using SADI Semantic Web services. This degree of access makes it possible to implement complex queries needed by our user community with minimal technical skill. We implemented a dashboard that reports on terminology changes that can render the services inactive, jeopardizing system interoperability. Using this information, end users can control and reactively rebuild services to preserve interoperability and minimize service downtime.
Teaching electromagnetism: interviewing three Greek high-school teachers
Creators: name: KALIAMPOS, GEORGE
name: PANTIDOS, PANAGIOTIS
name: GRIVOPOULOS, KONSTANTINOS
name: RAVANIS, KONSTANTINOS
Publisher: name: Mediterranean Journal of Education
Year: 2021
Subjects: Teachers’ science ideas, electromagnetism, secondary education

description: The present study is set in the context of teaching electromagnetism in Greek high schools. In particular, it aspires to probe teachers’ ideas about the way they deal with this teaching subject in classroom. For this purpose, empirical data were collected through interviewing 3 teachers who taught physics in Greek public domain schools. Research findings suggests that teachers face difficulty in teaching electromagnetism indicating its abstract nature as the main cause of it. Educational implications for teaching and learning electromagnetism are discussed in the final part of the study.
description: Mediterranean Journal of Education, Vol. 1, N. 2 (2021) - Colloque SIEST Méditerranée 7
Designing Trustworthy User Interfaces
Creators: name: Zieglmeier, Valentin
name: Lehene, Antonia Maria
Publisher: name: arXiv
Year: 2022
Subjects: subject: Human-Computer Interaction (cs.HC)
subject: Software Engineering (cs.SE)
subject: FOS: Computer and information sciences

description: Interface design can directly influence trustworthiness of a software. Thereby, it affects users' intention to use a tool. Previous research on user trust has not comprehensively addressed user interface design, though. We lack an understanding of what makes interfaces trustworthy (1), as well as actionable measures to improve trustworthiness (2). We contribute to this by addressing both gaps. Based on a systematic literature review, we give a thorough overview over the theory on user trust and provide a taxonomy of factors influencing user interface trustworthiness. Then, we derive concrete measures to address these factors in interface design. We use the results to create a proof of concept interface. In a preliminary evaluation, we compare a variant designed to elicit trust with one designed to reduce it. Our results show that the measures we apply can be effective in fostering trust in users.
description: Peer-reviewed version accepted for publication in the proceedings of the 33rd Australian Conference on Human-Computer Interaction (OzCHI '21)
Baling Cotton at Gins: Practices and Costs -- Flat, Standard, High Density Bales
Creators: name: Campbell, J. D.
name: Soxman, R. C.
name: Campbell, J. D.
name: Soxman, R. C.
Publisher: name: Unknown
Year: 1960
Subjects: subject: Crop Production/Industries
subject: Marketing
subject: FOS: Economics and business
subject: Production Economics
subject: Research and Development/Tech Change/Emerging Technologies

description: Excerpts from the report: Following World War II, there has been a modest, yet slowly increasing, adoption of new designs of bale presses by ginners, particularly in the West. These newer types of presses turn out bales that are as dense or denser than the standard density bales compressed at warehouses. By the 1957-58 season, about 2 percent of active gins were operating such presses. That season this small group of gins handled approximately 5 percent of the entire crop, a proportion greater than achieved by the round bale package (now abandoned) at its peak of popularity. Aim of the study reported on in this publication was to evaluate the new gin bale presses for the cotton industry on the basis of costs and problems and practices their use may bring, and to investigate attitudes of manufacturers on density and types of bales.
Dark Hole Maintenance and A Posteriori Intensity Estimation in the Presence of Speckle Drift in a High-Contrast Space Coronagraph
Creators: name: Pogorelyuk, Leonid
name: Kasdin, N. Jeremy
Publisher: name: arXiv
Year: 2019
Subjects: subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: FOS: Physical sciences

description: Direct exoplanet imaging via coronagraphy requires maintenance of high contrast in a dark hole for lengthy integration periods. Wavefront errors that change slowly over that time accumulate and cause systematic errors in the star's Point Spread Function (PSF) which limit the achievable signal-to-noise ratio of the planet. In this paper we show that estimating the speckle drift can be achieved via intensity measurements in the dark hole together with dithering of the deformable mirrors to increase phase diversity. A scheme based on an Extended Kalman Filter and Electric Field Conjugation is proposed for maintaining the dark hole during the integration phase. For the post-processing phase, an a posteriori approach is proposed to estimate the realization of the PSF drift process and the intensity of the planet light incoherent with the speckles.
description: 27 pages, 9 figures
Superconducting magnet designs and MRI accessibility: a review
Creators: name: Jimeno, Marina Manso
name: Vaughan, John Thomas
name: Geethanath, Sairam
Publisher: name: arXiv
Year: 2022
Subjects: subject: Medical Physics (physics.med-ph)
subject: FOS: Physical sciences

description: Presently, Magnetic Resonance Imaging (MRI) magnets must deliver excellent magnetic field (B0) uniformity to achieve optimum image quality. Long magnets can satisfy the homogeneity requirements but require considerable superconducting material. These designs result in large, heavy, costly, and unstable systems that aggravate as field strength increases. This issue is a crucial factor in the disparity of MR density and field strength use across the globe. Low-income settings show reduced access to MRI, especially to high field strengths. This article summarizes the proposed modifications to MRI superconducting magnet design and their impact on accessibility, including compact, reduced liquid Helium and specialty systems. Reducing the amount of superconductor inevitably entails shrinking the magnet size, resulting in higher field inhomogeneity. This work also reviews the state-of-the-art imaging and reconstruction methods to overcome this issue. Finally, we summarize the current and future challenges and opportunities in the design of accessible MRI.
description: Review article, 4 figures and 1 table, submitted to NMR in Biomedicine special issue "MRI for the world"
Hamiltonian Formulation of Quantum Hall Skyrmions with Hopf Term
Creators: name: Chakraborty, B.
name: Govindarajan, T. R.
Publisher: name: arXiv
Year: 1997
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We study the nonrelativistic nonlinear sigma model with Hopf term in this paper. This is an important issue beacuse of its relation to the currently interesting studies in skyrmions in quantum Hall systems. We perform the Hamiltonian analysis of this system in $CP^1$ variables. When the coefficient of the Hopf term becomes zero we get the Landau-Lifshitz description of the ferromagnets. The addition of Hopf term dramatically alters the Hamiltonian analysis. The spin algebra is modified giving a new structure and interpretation to the system. We point out momentum and angular momentum generators and new features they bring in to the system.
description: 16pages, Latex file, typos corrected
All about unambiguous polynomial closure
Creators: name: Place, Thomas
name: Zeitoun, Marc
Publisher: name: arXiv
Year: 2022
Subjects: subject: Formal Languages and Automata Theory (cs.FL)
subject: FOS: Computer and information sciences

description: We study a standard operator on classes of languages: unambiguous polynomial closure. We prove that for every class C of regular languages satisfying mild properties, the membership problem for its unambiguous polynomial closure UPol(C) reduces to the same problem for C. We also show that unambiguous polynomial closure coincides with alternating left and right deterministic closure. Moreover, we prove that if additionally C is finite, the separation and covering problems are decidable for UPol(C). Finally, we present an overview of the generic logical characterizations of the classes built using unambiguous polynomial closure.
La résolution créative de problèmes ouverts : approche didactique
Creators: name: MOUHOUCHE, ALI
Publisher: name: Mediterranean Journal of Education
Year: 2021
Subjects: Didactics, creativity, metacognition, problem, representation.

description: Creativity and problem solving are cross-curricular skills that are as important for life in general as in a professional setting to face the difficulties that we encounter and which are often '' open problems ''. What are the most useful didactic concepts for teaching / learning creativity? What would be the content to be taught for learning creativity? Poincarré, Koestler, Wallas, ... have proposed models of creativity. However, an important aspect remained unexplored in their theories: how, in practice, to derive applicable results, to creatively solve problems from the combination of ideas or from the bisociation of different planes distant at the origin, or from idea of divergence. Our hypothesis is that the point of view of science didactics can provide some answers to these questions. The useful didactic concepts, which we propose, are explained and tested in a few cases of open problems.
description: Mediterranean Journal of Education, Vol. 1, N. 2 (2021) - Colloque SIEST Méditerranée 7
Empreinte de la trajectoire professionnelle sur le rapport des enseignants du supérieur à l’autonomie des étudiants
Creators: name: DUCEUX, YANN
name: EL HAGE, SUZANE
name: VERCHIER, YANN
Publisher: name: Mediterranean Journal of Education
Year: 2021
Subjects: Didactic autonomy, pedagogical autonomy, university teacher, France, professional identity

description: Often identified as one of the essential factors for academic success, student autonomy is a recurring topic of study. In this article, we wish to interrogate the notion of autonomy (didactic and pedagogical autonomy) with regard to the professional trajectory of teacher-researchers. For this, we conducted a series of interviews (one interview with a physical sciences teacher and two interviews with humanities and social sciences teachers) during which we detailed the training and professional trajectory of university and engineering school teachers, and then we questioned them on the criteria associated with their students' autonomy. The results of the analysis of the corpus show that didactic autonomy is more present in the case of a physical science teacher compared to the other two interviews conducted with university teachers in the humanities and social sciences. This exploratory work is part of the health context that France has experienced since the spring of 2020.
description: Mediterranean Journal of Education, Vol. 1, N. 2 (2021) - Colloque SIEST Méditerranée 7
Helping Patients Choose Their Ideal Treatment for Achilles Tendon Ruptures: A Network Meta-Analysis and Protocol for Development and Field Testing a Patient Decision Aid
Creators: name: Meulenkamp, Brad
Publisher: name: Université d'Ottawa / University of Ottawa
Year: 2021
Subjects: Achilles tendon
Patient decision aid
Network meta-analysis

description: Treatment of acute Achilles tendon ruptures has long been controversial. Several treatment options exist for patient with variable harms and benefits to each. Recognizing that decision of treatment option is preference-sensitive, this thesis focused on updating the current literature on Achilles tendon rupture management to facilitate the creation of a patient decision aid. A network meta-analysis of all treatment options for acute Achilles tendon ruptures was performed. Results demonstrated that minimally invasive surgery options were associated with lower complications and lower complications requiring surgery. Return to sport was similar amongst all treatment groups. With guidance from the Ottawa Decision Support Framework and the International Patient Decision Aid Standards, a three-tiered protocol for development, alpha testing and field-testing a novel patient decision aid is outlined next. The patient decision aid will be reviewed and revised iteratively by multi-disciplinary steering group. This protocol will act as a framework for further orthopaedic patient decision aid development.
On the Turbulent Dynamics of Polymer Solutions
Creators: name: Balkovsky, E.
name: Fouxon, A.
name: Lebedev, V.
Publisher: name: arXiv
Year: 1999
Subjects: subject: Chaotic Dynamics (nlin.CD)
subject: Condensed Matter (cond-mat)
subject: Fluid Dynamics (physics.flu-dyn)
subject: FOS: Physical sciences

description: We study properties of dilute polymer solutions which are known to depend strongly on polymer elongation. The probability density function (PDF) of polymer end-to-end extensions $R$ in turbulent flows is examined. We demonstrate that if the value of the Lyapunov exponent $λ$ is smaller than the inverse molecular relaxation time $1/τ$ then the PDF has a strong peak at the equilibrium size $R_0$ and a power tail at $R\gg R_0$. This confirms and extends the results of \cite{Lumley72}. There is no essential influence of polymers on the flow in the regime $λτ<1$. At $λ>1/τ$ the majority of molecules is stretched to the linear size $R_{\rm op}\gg R_0$. The value of $R_{\rm op}$ can be much smaller than the maximal length of the molecules because of back reaction of the polymers on the flow, which suppresses velocity gradients thus preventing the polymers from maximal possible stretching.
description: 4 pages, revtex. Submitted to Phys. Rev. Lett. Revised after referee reports
Resistance to change and transformational learning in distance education
Creators: name: ARMAKOLAS, STEFANOS
name: KARFAKI, ELENI
name: GOMATOS, LEONIDAS
Publisher: name: Mediterranean Journal of Education
Year: 2021
Subjects: Self-directed learning, distance education, resistance to change

description: Researchers argue that experiential learning is related to the teaching that leads students to self-directed learning, aiming at their autonomy and emancipation. In this direction, some teaching models have been developed which can contribute positively to the cultivation of self-directed learning skills and to distance education programs. The use of collaborative techniques can contribute towards the above direction. In all models and theoretical approaches, however, educational planning is very important. The purpose of this paper is to investigate the degree of readiness of students in a distance education program for adults. The results highlight the role of the trainer-counselor, as the key person who will support self-directed learning and transformation and will help learners to overcome possible obstacles through collaborative techniques.
description: Mediterranean Journal of Education, Vol. 1, N. 2 (2021) - Colloque SIEST Méditerranée 7
Attentes des enseignants de la part d’un élève autonome en physique : étude de cas au Liban
Creators: name: EL HAJJAR, DARINE
name: EL HAGE, SUZANE
name: BOILEVIN, JEAN-MARIE
Publisher: name: Mediterranean Journal of Education
Year: 2021
Subjects: Autonomy, student, physics, physics teacher, high school

description: This communication aims to compare the expectations of the institution with the vision of Lebanese teachers on the autonomy of high school students in physics. This is why, we carry out semi-structured interviews with 3 high school teachers of physics as well as a representative of the institution, an educational counsellor in the physics. In this work, we discuss different domains of autonomy while distinguishing two types of autonomy: pedagogical autonomy and didactic autonomy. The results show elements of convergence, particularly in the technical, methodological and psych-affective fields between the four interviewees in terms of pedagogical and didactic autonomies.
description: Mediterranean Journal of Education, Vol. 1, N. 2 (2021) - Colloque SIEST Méditerranée 7
So close, so different: characterization of the K2-36 planetary system with HARPS-N
Creators: name: Damasso, M.
name: Zeng, L.
name: Malavolta, L.
name: Mayo, A.
name: Sozzetti, A.
name: Mortier, A.
name: Buchhave, L. A.
name: Vanderburg, A.
name: Lopez-Morales, M.
name: Bonomo, A. S.
name: Cameron, A. C.
name: Coffinet, A.
name: Figueira, P.
name: Latham, D. W.
name: Mayor, M.
name: Molinari, E.
name: Pepe, F.
name: Phillips, D. F.
name: Poretti, E.
name: Rice, K.
name: Udry, S.
name: Watson, C. A.
Publisher: name: arXiv
Year: 2019
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: FOS: Physical sciences

description: K2-36 is a K dwarf orbited by two small ($R_{\rm b}=1.43\pm0.08$ $R_\oplus$ and $R_{\rm c}=3.2\pm0.3$ $R_\oplus$), close-in ($a_{\rm b}$=0.022 AU and $a_{\rm c}$=0.054 AU) transiting planets discovered by Kepler/K2. They are representatives of two families of small planets ($R_{\rm p}$<4 $R_\oplus$) recently emerged from the analysis of Kepler data, with likely a different structure, composition and evolutionary pathways. We revise the fundamental stellar parameters and the sizes of the planets, and provide the first measurement of their masses and bulk densities, which we use to infer their structure and composition. We observed K2-36 with the HARPS-N spectrograph over $\sim$3.5 years, collecting 81 useful radial velocity measurements. The star is active, with evidence for increasing levels of magnetic activity during the observing time span. The radial velocity scatter is $\sim$17 \ms due to the stellar activity contribution, which is much larger that the semi-amplitudes of the planetary signals. We tested different methods for mitigating the stellar activity contribution to the radial velocity time variations and measuring the planet masses with good precision. We found that K2-36 is likely a $\sim$1 Gyr old system, and by treating the stellar activity through a Gaussian process regression, we measured the planet masses $m_{\rm b}$=3.9$\pm$1.1 $M_\oplus$ and $m_{\rm c}$=7.8$\pm$2.3 $M_\oplus$. The derived planet bulk densities $ρ_{\rm b}$=7.2$^{+2.5}_{-2.1}$ $g/cm^{3}$ and $ρ_{\rm c}$=1.3$^{+0.7}_{-0.5}$ $g/cm^{3}$ point out that K2-36\,b has a rocky, Earth-like composition, and K2-36\,c is a low-density sub-Neptune. Composed of two planets with similar orbital separations but different densities, K2-36 represents an optimal laboratory for testing the role of the atmospheric escape in driving the evolution of close-in, low-mass planets after $\sim$1 Gyr from their formation.
description: Accepted for publication on Astronomy $\&$ Astrophysics
Screening Corrections to the Electron Capture Rates in Dense Stars by the Relativistically Degenerate Electron Liquid
Creators: name: Itoh, Naoki
name: Tomizawa, Nami
name: Tamamura, Masaya
name: Wanajo, Shinya
name: Nozawa, Satoshi
Publisher: name: arXiv
Year: 2002
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We calculate the screening corrections to the electron capture rates in dense stars by the relativistically degenerate electron liquid. In order to calculate the screening corrections we adopt the linear response theory which is widely used in the field of solid state physics and liquid metal physics. In particular, we use the longitudinal dielectric function for the relativistically degenerate electron liquid derived by Jancovici. We calculate the screening potential at the position of the nucleus. By using this screening potential one can calculate the screening corrections to the electron capture rates. We will present accurate analytic fitting formulae which summarize our numerical results. These fitting formulae will facilitate the application of the present results. The screening corrections to the electron capture rates are typically a few percent.
description: uses AAS LaTeX macro package (Ver. 5.0), 8 pages, 2 tables, 4 figures, 2 subroutines, published in ApJ 579, 380-385 (2002)
Scratch programming as a tool for teaching angle as a rotation
Creators: name: KAKAVAS, KONSTANTINOS
name: ZACHAROS, KONSTANTINOS
name: SKOPELITI, IRINI
name: KOMIS, VASSILIS
Publisher: name: Mediterranean Journal of Education
Year: 2021
Subjects: Angle, rotation, simulation, Scratch

description: The present study is part of a larger research related to the cultivation of the concept of angle with the use of visual programming. This article introduces the teaching of the angle as a rotation using the Scratch programming language. A semi-structured digital microworld was designed to represent a screw that should be screwed into a piece of wood. The research involved 35 6th grade students who were asked to digitally simulate the actual movement of the screw. It is shown that visual programming can be an effective and dynamic tool for teaching rotation as an angle dimension.
description: Mediterranean Journal of Education, Vol. 1, N. 2 (2021) - Colloque SIEST Méditerranée 7
Divergence-Free Magnetohydrodynamics on Conformally Moving, Adaptive Meshes Using a Vector Potential Method
Creators: name: Fragile, P. Chris
name: Nemergut, Daniel
name: Shaw, Payden L.
name: Anninos, Peter
Publisher: name: arXiv
Year: 2018
Subjects: subject: Computational Physics (physics.comp-ph)
subject: FOS: Physical sciences

description: We present a new method for evolving the equations of magnetohydrodynamics (both Newtonian and relativistic) that is capable of maintaining a divergence-free magnetic field ($\nabla \cdot \mathbf{B} = 0$) on adaptively refined, conformally moving meshes. The method relies on evolving the magnetic vector potential and then using it to reconstruct the magnetic fields. The advantage of this approach is that the vector potential is not subject to a constraint equation in the same way the magnetic field is, and so can be refined and moved in a straightforward way. We test this new method against a wide array of problems from simple Alfven waves on a uniform grid to general relativistic MHD simulations of black hole accretion on a nested, spherical-polar grid. We find that the code produces accurate results and in all cases maintains a divergence-free magnetic field to machine precision.
description: 25 pages, 16 figures, submitted to Journal of Computational Physics
Lower extremity function in patients with early rheumatoid arthritis during the first five years, and relation to other disease parameters
Creators: name: M Mellblom Bengtsson
name: S Hagel
name: LTH Jacobsson
name: C Turesson
Publisher: name: Taylor & Francis
Year: 2019
Subjects: subject: Medicine
subject: Cell Biology
subject: Physiology
subject: FOS: Biological sciences
subject: Biotechnology
subject: Ecology
subject: Sociology
subject: FOS: Sociology
subject: Immunology
subject: FOS: Clinical medicine

description: Objective: The objective of this study was to investigate lower extremity function in early rheumatoid arthritis (RA) and assess its relation to other disease parameters. Methods: An inception cohort (recruited in 1995–2005) of patients with early RA was followed according to a structured protocol. Lower extremity function was investigated at inclusion and after 1, 2, and 5 years using the Index of Muscle Function (IMF; total score 0–40). Self-reported disability was estimated using the Health Assessment Questionnaire (HAQ). The same rheumatologist assessed patients for swollen joints and joint tenderness. Results: In total, 106 patients were included. Lower extremity function improved from baseline to the 1 year visit [IMF total median 10, interquartile range (IQR) 4–16 vs 7, IQR 3–12; p = 0.01]. This was followed by a decline in lower extremity function. Throughout the study, there were significant correlations between IMF and HAQ scores (r = 0.38–0.58; p Conclusion: Lower extremity function in early RA improved during the first year, followed by a gradual decline. Ankle involvement had a greater impact than MTP involvement on lower extremity function. This highlights the importance of treating large-joint disease in RA.
Analyse de l’enseignement ordinaire des ondes mécaniques et de ses effets
Creators: name: BEN JEMAA, AHMED
name: SADDOUKI, SAIDA
Publisher: name: Mediterranean Journal of Education
Year: 2021
Subjects: Ordinary teaching, epistemic density, topogenesis, wave, celerity

description: This article is theoretically based on the findings of several studies, which illustrate the difficulties associated with teaching/learning of waves to both high school and college students. Following this observation, we decided to conduct a descriptive and comprehensive study on what occurs during lectures on mechanical waves, when students encounter for the first time basic concepts of the wave such as vibration, propagation medium and celerity.
description: Mediterranean Journal of Education, Vol. 1, N. 2 (2021) - Colloque SIEST Méditerranée 7
Enseigner l’intensité du courant : analyse d’activités expérimentales
Creators: name: KPOKPOLINGOU KOYAMBESSE, JOSEPH PRINCE
name: BOILEVIN, JEAN-MARIE
Publisher: name: Mediterranean Journal of Education
Year: 2021
Subjects: Experimental activity, the experimental device, intensity of the current, material constrain

description: Our study focuses on experimental activity in the teaching of electricity in secondary schools in the Central African Republic. We analyse, according to the double didactic and ergonomic approach, the activity of two Central African teachers of physical science, during a class session on the intensity of the current in the 9th grade. Our research, centred on the realisation of the first task, which is to carry out an electrical assembly, aims to show how the choices of the experimental device impact the course of the session and how these teachers differ in their consideration, more particularly of the observations and their experimental implementation. The differences observed in the course of the teaching practices show the influence of the personal component of each teacher's activity on its cognitive and mediative components, despite a material constraint.
description: Mediterranean Journal of Education, Vol. 1, N. 2 (2021) - Colloque SIEST Méditerranée 7
Collective excitations of fractional quantum Hall states in monolayer graphene
Creators: name: Narayanan, Sujit
name: Kennett, Malcolm P.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We study the collective excitations of fractional quantum Hall states in graphene. We focus on states which allow for chiral symmetry breaking (CSB) orders, specifically antiferromagnetism and charge density wave order. We investigate numerically how the collective excitation spectra depend on filling and the flux attachment scheme for two classes of variational states, the Töke-Jain sequence and the Modak-Mandal-Sengupta sequence.
description: 15 pages, 8 figures
Conceptions d’enfants de cinq ans sur le cycle de la matière organique dans le contexte du compostage
Creators: name: MARCHAL-GAILLARD, VALÉRIE
Publisher: name: Mediterranean Journal of Education
Year: 2021
Subjects: Early childhood environmental education, science education, preconceptions, home organic waste management

description: This paper focuses on the knowledge about organic matter processes among five-year-old children who were only exposed to informal learning within the context of home waste management. We used structured interviews with 48 young children to determine their knowledge about the organic matter cycling in composters. The determination of five significant stages for a global understanding of the cycle of organic matter and the construction of three levels of conceptions have allowed us to conclude that young children are able to understand scientific processes involved in composting in the context of their family practice of organic waste management.
description: Mediterranean Journal of Education, Vol. 1, N. 2 (2021) - Colloque SIEST Méditerranée 7
Exponentials as Substitutions and the Cost of Cut Elimination in Linear Logic
Creators: name: Accattoli, Beniamino
Publisher: name: arXiv
Year: 2022
Subjects: subject: Logic in Computer Science (cs.LO)
subject: Programming Languages (cs.PL)
subject: FOS: Computer and information sciences

description: This paper introduces the exponential substitution calculus (ESC), a new presentation of cut elimination for IMELL, based on proof terms and building on the idea that exponentials can be seen as explicit substitutions. The idea in itself is not new, but here it is pushed to a new level, inspired by Accattoli and Kesner's linear substitution calculus (LSC). One of the key properties of the LSC is that it naturally models the sub-term property of abstract machines, that is the key ingredient for the study of reasonable time cost models for the $λ$-calculus. The new ESC is then used to design a cut elimination strategy with the sub-term property, providing the first polynomial cost model for cut elimination with unconstrained exponentials. For the ESC, we also prove untyped confluence and typed strong normalization, showing that it is an alternative to proof nets for an advanced study of cut elimination.
Making first order linear logic a generating grammar
Creators: name: Slavnov, Sergey
Publisher: name: arXiv
Year: 2022
Subjects: subject: Computation and Language (cs.CL)
subject: Logic in Computer Science (cs.LO)
subject: Logic (math.LO)
subject: FOS: Computer and information sciences
subject: FOS: Mathematics

description: It is known that different categorial grammars have surface representation in a fragment of first order multiplicative linear logic (MLL1). We show that the fragment of interest is equivalent to the recently introduced extended tensor type calculus (ETTC). ETTC is a calculus of specific typed terms, which represent tuples of strings, more precisely bipartite graphs decorated with strings. Types are derived from linear logic formulas, and rules correspond to concrete operations on these string-labeled graphs, so that they can be conveniently visualized. This provides the above mentioned fragment of MLL1 that is relevant for language modeling not only with some alternative syntax and intuitive geometric representation, but also with an intrinsic deductive system, which has been absent.
 In this work we consider a non-trivial notationally enriched variation of the previously introduced ETTC, which allows more concise and transparent computations. We present both a cut-free sequent calculus and a natural deduction formalism.
Relation between scattering amplitude and Bethe-Salpeter wave function in quantum field theory
Creators: name: Yamazaki, Takeshi
name: Kuramashi, Yoshinobu
Publisher: name: arXiv
Year: 2019
Subjects: subject: High Energy Physics - Lattice (hep-lat)
subject: FOS: Physical sciences

description: We discuss an exact relation between the two-particle scattering amplitude and the Bethe-Salpeter (BS) wave function inside the interaction range in quantum field theory. In the relation the reduced BS wave function defined by the BS wave function plays an essential role. Through the relation the on-shell and half off-shell amplitudes can be calculated. We also show that the solution of Schrödinger equation with the effective potential determined from the BS wave function gives a correct on-shell scattering amplitude only at the momentum where the effective potential is determined. Furthermore we discuss a derivative expansion of the reduced BS wave function and a condition to obtain results independent of the interpolating operators in the time-dependent HALQCD method.
description: 7 pages, Proceedings of the 36th International Symposium on Lattice Field Theory (Lattice 2018), July 22-28, 2018, Michigan, USA
A Small Country Elevator for Merchandising Grain: Designs and Recommendations
Creators: name: Bouland, Heber D.
name: Smith, Lloyd L.
name: Bouland, Heber D.
name: Smith, Lloyd L.
Publisher: name: Unknown
Year: 1960
Subjects: subject: Crop Production/Industries
subject: Marketing
subject: FOS: Economics and business
subject: Research and Development/Tech Change/Emerging Technologies

description: Excerpts from the report: The layouts and designs illustrated and described in this report are for a small, country grain elevator with a total storage capacity of about 32,000 bushels. The designs were developed mainly for the Southeast where there is a need for a small plant with tanks and equipment for handling, but not storing, large volumes of grain. However, the designs are equally applicable to other areas of the country with similar grain storage and handling needs. The report includes discussions and recommendations on: (1) Selection of building material and the type of building construction; (2) selection of handling and other equipment; (3) layout and arrangement of the facility; (4) estimated initial construction costs; and (5) estimated annual facility cost including depreciation, interest, maintenance, insurance, and taxes. Three different types of plants were developed and are described in this report: (1) One handling shelled corn and small grain; (2) one handling ear corn, shelled corn, and small grain; and (3) one receiving mainly ear corn.
A characterization of rich c-partite (c > 7) tournaments without (c + 2)-cycles
Creators: name: Zhang, Jie
name: Wang, Zhilan
name: Yan, Jin
Publisher: name: arXiv
Year: 2022
Subjects: subject: Combinatorics (math.CO)
subject: FOS: Mathematics

description: Let c be an integer. A c-partite tournament is an orientation of a complete c-partite graph. A c-partite tournament is rich if it is strong, and each partite set has at least two vertices. In 1996, Guo and Volkmann characterized the structure of all rich c-partite tournaments without (c + 1)-cycles, which solved a problem by Bondy. They also put forward a problem that what the structure of rich c-partite tournaments without (c + k)-cycles for some k>1 is. In this paper, we answer the question of Guo and Volkmann for k = 2.
Propagation of chaos in mean field networks of FitzHugh-Nagumo neurons
Creators: name: Colombani, Laetitia
name: Bris, Pierre Le
Publisher: name: arXiv
Year: 2022
Subjects: subject: Probability (math.PR)
subject: FOS: Mathematics
subject: 92C20, 60H10, 60F99

description: In this article, we are interested in the behavior of a fully connected network of $N$ neurons, where $N$ tends to infinity. We assume that the neurons follow the stochastic FitzHugh-Nagumo model, whose specificity is the non-linearity with a cubic term. We prove a result of uniform in time propagation of chaos of this model in a mean-field framework. We also exhibit explicit bounds. We use a coupling method initially suggested by A. Eberle (arXiv:1305.1233), and recently extended in (1805.11387), known as the reflection coupling. We simultaneously construct a solution of the $N$-particle system and $N$ independent copies of the non-linear McKean-Vlasov limit in such a way that, considering an appropriate semi-metric that takes into account the various possible behaviors of the processes, the two solutions tend to get closer together as $N$ increases, uniformly in time. The reflection coupling allows us to deal with the non-convexity of the underlying potential in the dynamics of the quantities defining our network, and show independence at the limit for the system in mean field interaction with sufficiently small Lipschitz continuous interactions.
description: 50 pages, published version