cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Detection of Microcalcification in Mammograms Using Wavelet Transform and Fuzzy Shell Clustering
Creators: name: Balakumaran, T.
name: Vennila, I. L. A.
name: Shankar, C. Gowri
Publisher: name: arXiv
Year: 2010
Subjects: subject: Computer Vision and Pattern Recognition (cs.CV)
subject: FOS: Computer and information sciences

description: Microcalcifications in mammogram have been mainly targeted as a reliable earliest sign of breast cancer and their early detection is vital to improve its prognosis. Since their size is very small and may be easily overlooked by the examining radiologist, computer-based detection output can assist the radiologist to improve the diagnostic accuracy. In this paper, we have proposed an algorithm for detecting microcalcification in mammogram. The proposed microcalcification detection algorithm involves mammogram quality enhancement using multirresolution analysis based on the dyadic wavelet transform and microcalcification detection by fuzzy shell clustering. It may be possible to detect nodular components such as microcalcification accurately by introducing shape information. The effectiveness of the proposed algorithm for microcalcification detection is confirmed by experimental results.
description: IEEE format, International Journal of Computer Science and Information Security, IJCSIS January 2010, ISSN 1947 5500, http://sites.google.com/site/ijcsis/
A theoretical model for predicting rough pipe heat transfer.
Creators: name: Kiss, Mart
Publisher: name: University of British Columbia
Year: 2011

description: A model has been developed for predicting turbulent heat transfer coefficients and associated temperature profiles in rough pipes from a knowledge of the fluid mechanics. The proposed method employs the Lyon heat transfer equation together with the velocity profile equations of Rouse and von Karman. Nusselt numbers were calculated by the proposed method for the following range of variables: f = fs to 0.020 Re = 4 x 10³ to 10⁷ Pr = 0.001 to 1,000 Temperature profiles were calculated for all combinations of the above extreme conditions, as well as for Pr = 1.0. The validity of the proposed model was tested by comparison of the predicted results with the experimental data of Nunner, Smith and Epstein and Dipprey. A similar test was made of Nunner's theoretical equation. It is concluded that, except for fluids with very low Prandtl numbers, e.g. liquid metals, the proposed model gives no better prediction of Nusselt number than Nunner's equation, which is less cumbersome to apply. In the existing form, the proposed model is not adequate. Certain combinations of the independent variables give rise to a discontinuity in the predicted value of Nusselt number. This is inconceivable in the physically real situation. Beyond the discontinuity appears a predicted region of zero net flow in the pipe. Two limiting assumptions can be made regarding the method of heat transport through this layer - viz. by molecular conduction only, or by an infinite conductivity eddy mechanism. Both assumptions have been made, and values of Nu calculated for each, whenever the situation arose. The agreement between the predicted and the experimental temperature profiles is in general good. However, not enough experimental data are available to satisfactorily define the effect of Re and f, and to substantiate the calculated results.
title: What is your teacher rubric? Extracting teachers’ assessment constructs
Creators: name: Jeong, Heejeong
Publisher: name: University of Massachusetts Amherst
Year: 2015

description: Rubrics not only document the scales and criteria of what is assessed, but can also represent the assessment construct of the developer. Rubrics display the key assessment criteria, and the simplicity or complexity of the rubric can illustrate the meaning associated with the score. For this study, five experienced teachers developed a rubric for an EFL (English as a Foreign Language) descriptive writing task. Results show that even for the same task, teachers developed different formats and styles of rubric with both similar and different criteria. The teacher rubrics were analyzed for assessment criteria, rubric type and scale type. Findings illustrate that in terms of criteria, all teacher rubrics had five areas in common: comprehension, paragraph structure, sentence structure, vocabulary, and grammar. The criteria that varied were mechanics, length, task completion, and self-correction. Rubric style and scales also were different among teachers. Teachers who valued global concerns (i.e., comprehension) in writing designed more general holistic rubrics, while teachers who focused more on sentence-level concerns (i.e., grammar) developed analytic rubrics with more details. The assessment construct of the teacher was shown in the rubric through assessment criteria, rubric style, and scale. Accessed 7,170 times on https://pareonline.net from March 20, 2015 to December 31, 2019. For downloads from January 1, 2020 forward, please click on the PlumX Metrics link to the right.
Lightweight data engineering, tools, and software to facilitate data reuse and data science
Creators: name: Davis, Sean
name: Bioconductor
Publisher: name: F1000 Research Limited
Year: 2019

description: Lightweight tools, software, and publication processes that tie together data resources, analysis tools, documentation can powerful stimuli for the high-quality reuse of available data. While developed with reproducibility as a core value, Bioconductor tooling and infrastructure has reduced barriers to data reuse and established best practices for rich data and metadata sharing in genomics and proteomics. In this talk, I give a few examples and motivation for how the Bioconductor data ecosystem can be a model for other communities to enhance the value of available data.
Para uma caracterização da investigação em Didática sobre as interações plurilingues em contexto de intercompreensão à distância
Creators: name: Araújo E Sá, Maria Helena
name: De Carlo, Maddalena
name: Espinha, Ângela
Publisher: name: Fondazione Università Ca’ Foscari Venezia, Italia
Year: 2019

description:

Intercomprehension (IC) is based on the ability of the subject, in plurilingual and intercultural communication, to understand the language(s) of Others and to be understood in their language(s). Virtual mobility has motivated a set of studies on virtual interactive IC which we aim to analyse in order to identify the competences developed in this context of communication. We conducted a literature review with a systematic approach of 30 studies which shows that participants develop plurilingual and intercultural competences, as well as general ones. Besides, the dispersion between theoretical frameworks and methodological instruments makes it difficult to build a coherent body of knowledge.

description: EL.LE
Detection and localization of change-points in high-dimensional network traffic data
Creators: name: Lévy-Leduc, Céline
name: Roueff, François
Publisher: name: arXiv
Year: 2009
Subjects: subject: Applications (stat.AP)
subject: FOS: Computer and information sciences

description: We propose a novel and efficient method, that we shall call TopRank in the following paper, for detecting change-points in high-dimensional data. This issue is of growing concern to the network security community since network anomalies such as Denial of Service (DoS) attacks lead to changes in Internet traffic. Our method consists of a data reduction stage based on record filtering, followed by a nonparametric change-point detection test based on $U$-statistics. Using this approach, we can address massive data streams and perform anomaly detection and localization on the fly. We show how it applies to some real Internet traffic provided by France-Télécom (a French Internet service provider) in the framework of the ANR-RNRT OSCAR project. This approach is very attractive since it benefits from a low computational load and is able to detect and localize several types of network anomalies. We also assess the performance of the TopRank algorithm using synthetic data and compare it with alternative approaches based on random aggregation.
description: Published in at http://dx.doi.org/10.1214/08-AOAS232 the Annals of Applied Statistics (http://www.imstat.org/aoas/) by the Institute of Mathematical Statistics (http://www.imstat.org)
Inhomogeneous DNA: conducting exons and insulating introns
Creators: name: Krokhin, A. A.
name: Bagci, V. M. K.
name: Izrailev, F. M.
name: Usatenko, O. V.
name: Yampol'skii, V. A.
Publisher: name: arXiv
Year: 2009
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: Biomolecules (q-bio.BM)
subject: Genomics (q-bio.GN)
subject: FOS: Physical sciences
subject: FOS: Biological sciences

description: Parts of DNA sequences known as exons and introns play very different role in coding and storage of genetic information. Here we show that their conducting properties are also very different. Taking into account long-range correlations among four basic nucleotides that form double-stranded DNA sequence, we calculate electron localization length for exon and intron regions. Analyzing different DNA molecules, we obtain that the exons have narrow bands of extended states, unlike the introns where all the states are well localized. The band of extended states is due to a specific form of the binary correlation function of the sequence of basic DNA nucleotides.
description: 14 pages, 6 figures
Sviluppare competenze in intercomprensione di livello avanzato
Creators: name: Garbarino, Sandra
Publisher: name: Fondazione Università Ca’ Foscari Venezia, Italia
Year: 2019

description:

The present paper discusses the progression of interaction skills in contexts of intercomprehension mediated by ICT (forums, chats and VoIP). It illustrates how the Language Centre of Lyon 2 University faced the challenge of creating a pluriannual course of intercomprehension among Romance languages integrated into the academic curriculum. This important acknowledgement, related to the linguistic policy of the university, naturally led to the creation of a syllabus extended over 4 semesters. The courses outline was structured by taking into account the descriptors of the REFIC (Référentiel de compétences de communication en intercompréhension), the literature on curricular integration of intercomprehension and the results of action-research.

description: EL.LE
Results on Charmed Meson Spectroscopy from FOCUS
Creators: name: J.M. Link
name: V.S. Paolone
name: M. Reyes
name: P.M. Yager
name: J.C. Anjos
name: I. Bediaga
name: C. Göbel
name: J. Magnin
name: J.M. De Miranda
name: I.M. Pepe
name: A.C. Dos Reis
name: F. Simão
name: S. Carrillo
name: E. Casimiro
name: H. Mendez
name: A.Sánchez-Hernández
name: C. Uribe
name: F. Vasquez
name: L. Cinquini
name: J.P. Cumalat
name: J.E. Ramirez
name: B. O'Reilly
name: E.W. Vaandering
name: J.N. Butler
name: H.W.K. Cheung
name: I. Gaines
name: P.H. Garbincius
name: L.A. Garren
name: E. Gottschalk
name: S.A. Gourlay
name: P.H. Kasper
name: A.E. Kreymer
name: R. Kutschke
name: S. Bianco
name: F.L. Fabbri
name: S. Sarwar
name: A. Zallo
name: C. Cawlfield
name: D.Y. Kim
name: K.S. Park
name: A. Rahimi
name: J. Wiss
name: R. Gardner
name: Y.S. Chung
name: J.S. Kang
name: B.R. Ko
name: J.W. Kwak
name: K.B. Lee
name: S.S. Myung
name: H. Park
name: G. Alimonti
name: M. Boschini
name: D. Brambilla
name: B. Caccianiga
name: A. Calandrino
name: P. D'Angelo
name: M. DiCorato
name: P. Dini
name: M. Giammarchi
name: P. Inzani
name: F. Leveraro
name: S. Malvezzi
name: D. Menasce
name: M. Mezzadri
name: L. Milazzo
name: L. Moroni
name: D. Pedrini
name: F. Prelz
name: M. Rovere
name: A. Sala
name: S. Sala
name: T.F. Davenport III
name: V.Arena
name: G. Boca
name: G. Bonomi
name: G. Gianini
name: G. Liguori
name: M. Merlo
name: D. Pantea
name: S.P. Ratti
name: C. Riccardi
name: P. Torre
name: L. Viola
name: P. Vitulo
name: H. Hernandez
name: A.M. Lopez
name: L. Mendez
name: A. Mirles
name: E. Montiel
name: D. Olaya
name: J. Quinones
name: C. Rivera
name: Y. Zhang
name: N. Copty
name: M. Purohit
name: J.R. Wilson
name: K. Cho
name: T. Handler
name: D. Engh
name: W.E. Johns
name: M. Hosack
name: M.S. Nehring
name: M. Sales
name: P.D. Sheldon
name: K. Stenson
name: M.S. Webster
name: M. Sheaff
name: Y. Kwon
Publisher: name: INFN Open Access Repository
Year: 2000

description: We report the preliminary measurement by the FOCUS Collaboration (E831 at Fermilab) of masses and widths of the L=1 charm mesons: a D*^0_2 state of mass (width) 2463 .5 ±1 .5 ±1 .5(30 .5 ±1 .9 ±3 .8) MeV/c^2 decaying to D^+pi^-, and a D*^+_2 state of mass (width) 2468.2 ±1 .5 ±1 .4(28 .6 ±1 .3 ±3 .8)M V /c 2 decaying to D^0pi^+. The fit of the invariant mass distribution requires an additional term to account for a broad structure over background.
title: Interrater reliability in large-scale assessments – Can teachers score national tests reliably without external controls?
Creators: name: Pantzare, Anna Lind
Publisher: name: University of Massachusetts Amherst
Year: 2015

description: Copyright is retained by the first or sole author, who grants right of first publication to Practical Assessment, Research & Evaluation. Permission is granted to distribute this article for nonprofit, educational purposes if it is copied in its entirety and the journal is credited. PARE has the right to authorize third party reproduction of this article in print, electronic and database forms. Accessed 5,280 times on https://pareonline.net from April 07, 2015 to December 31, 2019. For downloads from January 1, 2020 forward, please click on the PlumX Metrics link to the right.
title: An Introduction to Missing Data in the Context of Differential Item Functioning
Creators: name: Banks, Kathleen
Publisher: name: University of Massachusetts Amherst
Year: 2015

description: This article introduces practitioners and researchers to the topic of missing data in the context of differential item functioning (DIF), reviews the current literature on the issue, discusses implications of the review, and offers suggestions for future research. A total of nine studies were reviewed. All of these studies determined what effect particular missing data techniques would have on the results of certain DIF detection procedures under various conditions. The most important finding of this review involved the use of zero imputation as a missing data technique. The review shows that zero imputation can lead to inflated Type I errors, especially in cases where the examinees ability level has not been taken into consideration. Accessed 4,236 times on https://pareonline.net from April 25, 2015 to December 31, 2019. For downloads from January 1, 2020 forward, please click on the PlumX Metrics link to the right.
title: Evaluating Common Item Block Options when Faced with Practical Constraints
Creators: name: Wolkowitz, Amanda
name: Davis-Becker, Susan
Publisher: name: University of Massachusetts Amherst
Year: 2015

description: This study evaluates the impact of common item characteristics on the outcome of equating in credentialing examinations when traditionally recommended representation is not possible. This research used real data sets from several credentialing exams to test the impact of content representation, item statistics, and number of common items on equating results. The results of this research suggests that it may not be necessary to have a common item block that is strictly proportional in content or difficulty to the entire exam if the exam is unidimensional. The results also suggest that it may be beneficial to use all common items between two forms for equating instead of focusing on a smaller anchor block. Accessed 2,858 times on https://pareonline.net from September 30, 2015 to December 31, 2019. For downloads from January 1, 2020 forward, please click on the PlumX Metrics link to the right.
L’évaluation sommative/certificative en intercompréhension réceptive de l’oral
Creators: name: Jamet, Marie-Christine
Publisher: name: Fondazione Università Ca’ Foscari Venezia, Italia
Year: 2019

description:

In light of a general reflection on the criteria for an assessment process, we will focus on the evaluation of plurilingual competencies in Intercomprehension and, in particular, on oral listening skills, by observing best practices in unilingual official certifications, and by taking an approach that goes from the general to the particular. We will reflect on the concrete tools for measuring this hability, by discussing the choices of the CINCO and EVAL-IC projects – the first European project to tackle the question of evaluation under all its angles – with the goal of defining the contours of an assessment method taking into account the plurality of its possible forms.

description: EL.LE
The 2pt+: an enhanced 2 point correlation function
Creators: name: Ave, M.
name: Cazon, L.
name: Cronin, J.
name: Neto, J. R. T. de Mello
name: Olinto, A. V.
name: Pavlidou, V.
name: Privitera, P.
name: Siffert, B. B.
name: Schmidt, F.
name: Venters, T.
Publisher: name: arXiv
Year: 2009
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: We introduce a new method for testing departure from isotropy of points on a sphere based on an enhanced form of the two-point correlation function that we named 2pt+. This method uses information from the two extra variables that define the vector between two points on a sphere. We show that this is a powerful method to test departure from isotropy of a distribution of points on a sphere especially when the number of events is small. We apply the method to a few examples in astronomy and discuss the relevance for limited datasets, such as the case of ultra-high energy cosmic rays.
description: 17 pages, 14 figures
title: What is Rotating in Exploratory Factor Analysis?
Creators: name: Osborne, Jason W.
Publisher: name: University of Massachusetts Amherst
Year: 2015

description: Exploratory factor analysis (EFA) is one of the most commonly-reported quantitative methodology in the social sciences, yet much of the detail regarding what happens during an EFA remains unclear. The goal of this brief technical note is to explore what "rotation" is, what exactly is rotating, and why we use rotation when performing EFAs. Some commentary about the relative utility and desirability of different rotation methods concludes the narrative.
« Schüler werden dadurch motiviert, dass sie eigentlich mehr wissen als ihnen bewusst ist »
Creators: name: Araújo E Sá, Maria Helena
name: Melo Pfeifer, Silvia Maria
Publisher: name: Fondazione Università Ca’ Foscari Venezia, Italia
Year: 2019

description:

Following our previous studies in the field of student teachers’ representations about the four pluralistic approaches, we shall focus, in this contribution, on this target audience’s representations about one particular approach: intercomprehension. We will analyse student teachers’ perceptions concerning the advantages and the possibilities of integrating intercomprehension in the school curriculum. We will therefore analyse the educational, social and affective, pedagogical and organizstional and learning arguments student teachers put forward to justify their perceptions. This study aims at contributing to the planning and implementation of specific training initiatives in the field of intercomprehension didactics for language student teachers.

description: EL.LE
The Fast Haar Wavelet Transform for Signal & Image Processing
Creators: name: Ashok, V.
name: Balakumaran, T.
name: Gowrishankar, C.
name: Vennila, I. L. A.
name: kumar, A. Nirmal
Publisher: name: arXiv
Year: 2010
Subjects: subject: Multimedia (cs.MM)
subject: Computer Vision and Pattern Recognition (cs.CV)
subject: FOS: Computer and information sciences

description: A method for the design of Fast Haar wavelet for signal processing and image processing has been proposed. In the proposed work, the analysis bank and synthesis bank of Haar wavelet is modified by using polyphase structure. Finally, the Fast Haar wavelet was designed and it satisfies alias free and perfect reconstruction condition. Computational time and computational complexity is reduced in Fast Haar wavelet transform.
description: IEEE format, International Journal of Computer Science and Information Security, IJCSIS January 2010, ISSN 1947 5500, http://sites.google.com/site/ijcsis/
title: Cost-Benefit Analysis Is Needed in American Public Education
Creators: name: Stoneberg, Bert
Publisher: name: University of Massachusetts Amherst
Year: 2015

description: Public school critics often point to rising expenditures and relatively flat test scores to justify their school reform agendas. The claims are flawed because their analyses fail to account for the difference in data types between dollars (ratio) and test scores (interval). A cost-benefit analysis using dollars as a common metric for both costs and benefits can provide a good estimate of their relationship. It also acknowledges that costs and benefits are both subject to inflation. The National Center for Education Research administers a methods training program for researchers who want to know more about cost-benefit analyses on education policies and programs. Accessed 3,753 times on https://pareonline.net from July 03, 2015 to December 31, 2019. For downloads from January 1, 2020 forward, please click on the PlumX Metrics link to the right.
Universality of shear-banding instability and crystallization in sheared granular fluid
Creators: name: Alam, Meheboob
name: Shukla, Priyanka
name: Luding, Stefan
Publisher: name: arXiv
Year: 2008
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: FOS: Physical sciences

description: The linear stability analysis of an uniform shear flow of granular materials is revisited using several cases of a Navier-Stokes'-level constitutive model in which we incorporate the global equation of states for pressure and thermal conductivity (which are accurate up-to the maximum packing density $ν_{m}$) and the shear viscosity is allowed to diverge at a density $ν_μ$ ($< ν_{m}$), with all other transport coefficients diverging at $ν_{m}$. It is shown that the emergence of shear-banding instabilities (for perturbations having no variation along the streamwise direction), that lead to shear-band formation along the gradient direction, depends crucially on the choice of the constitutive model. In the framework of a dense constitutive model that incorporates only collisional transport mechanism, it is shown that an accurate global equation of state for pressure or a viscosity divergence at a lower density or a stronger viscosity divergence (with other transport coefficients being given by respective Enskog values that diverge at $ν_m$) can induce shear-banding instabilities, even though the original dense Enskog model is stable to such shear-banding instabilities. For any constitutive model, the onset of this shear-banding instability is tied to a {\it universal} criterion in terms of constitutive relations for viscosity and pressure, and the sheared granular flow evolves toward a state of lower "dynamic" friction, leading to the shear-induced band formation, as it cannot sustain increasing dynamic friction with increasing density to stay in the homogeneous state. A similar criterion of a lower viscosity or a lower viscous-dissipation is responsible for the shear-banding state in many complex fluids.
description: 26 pages
L’enseignement du français à travers l’approche intercompréhensive dans les écoles bilingues
Creators: name: Pishva, Yasmin
Publisher: name: Fondazione Università Ca’ Foscari Venezia, Italia
Year: 2019

description:

This contribution proposes a reflection on a plural approach as intercomprehension to bi-multilingual education. To do this, I propose to take advantage of reflections from training French teachers in bilingual schools and university professors in the Balkan region. In my analysis, I will compare the results obtained with the skills descriptors of the Intercomprehension Framework for Multilingual Communication Skills (REFIC) in order to identify the descriptors showing the learning objectives adapted to such a specific teaching context.

description: EL.LE
Gallstone Ileus with prospective diagnosis of Crohn\'s
Creators: name: MOHAMMED, AMJAD
Publisher: name: EURORAD
Year: 2015
Subjects: subject: Abdomen
subject: CT
subject: Plain radiographic studies
subject: Diagnostic procedure
subject: Obstruction / Occlusion

description: Clinical History Image Findings Discussion Find Diagnosis Differential Diagnosis
description: female, 62 years
description: Clinical History: A 64 year old lady presented with abdominal pain, vomiting and diarrhoea, which had been worsening over a week's time. She had a past medical history of treated hypertension, hypercholesterolemia and gastro-oesophageal reflux - a previous endoscopy had re... Final Diagnosis: Gallstone ileus with high grade small bowel obstruction and a prospective diagnosis of Crohn's.
Plurilinguismo e intercomprensione nella classe di italiano L2 a migranti adulti
Creators: name: Cognigni, Edith
Publisher: name: Fondazione Università Ca’ Foscari Venezia, Italia
Year: 2019

description:

This article reflects on how to activate and capitalise on adult migrant learners’ plurilingual repertoires through intercomprehension in the Italian L2 classroom. Firstly, two survey results with adult migrant learners and teachers of Italian as L2 are discussed so as to show how plurilingual practices are perceived and activated by both parties. Secondly the article discusses how studies on the intercomprehension between related languages and on the role of English as a bridge language towards Romance languages can be usefully applied in the given learning context in order to enhance the metalinguistic awareness of learners and develop teachers’ ability to capitalize their language repertoires in the teaching of the target language.

description: EL.LE
title: Chi-Square Test is Statistically Significant: Now What?
Creators: name: Sharpe, Donald
Publisher: name: University of Massachusetts Amherst
Year: 2015

description: Applied researchers have employed chi-square tests for more than one hundred years. This paper addresses the question of how one should follow a statistically significant chi-square test result in order to determine the source of that result. Four approaches were evaluated: calculating residuals, comparing cells, ransacking, and partitioning. Data from two recent journal articles were used to illustrate these approaches. A call is made for greater consideration of foundational techniques such as the chi-square tests. Accessed 74,155 times on https://pareonline.net from April 06, 2015 to December 31, 2019. For downloads from January 1, 2020 forward, please click on the PlumX Metrics link to the right.
Pyroelectric response of ferroelectric nanoparticles: size effect and electric energy harvesting
Creators: name: Morozovska, A. N.
name: Eliseev, E. A.
name: Svechnikov, G. S.
name: Kalinin, S. V.
Publisher: name: arXiv
Year: 2009
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: The size effect on pyroelectric response of ferroelectric nanowires and nanotubes is analyzed. The pyroelectric coefficient strongly increases with the wire radius decrease and diverges at critical radius Rcr corresponding to the size-driven transition into paraelectric phase. Size-driven enhancement of pyroelectric coupling leads to the giant pyroelectric current and voltage generation by the polarized ferroelectric nanoparticles in response to the temperature fluctuation. The maximum efficiency of the pyroelectric energy harvesting and bolometric detection is derived, and is shown to approach the Carnot limit for low temperatures.
description: 17 pages, 4 figures, 1 Appendix
The friction of a mesh-like super-hydrophobic surface
Creators: name: Davis, Anthony M. J.
name: Lauga, Eric
Publisher: name: arXiv
Year: 2009
Subjects: subject: Fluid Dynamics (physics.flu-dyn)
subject: Soft Condensed Matter (cond-mat.soft)
subject: FOS: Physical sciences

description: When a liquid droplet is located above a super-hydrophobic surface, it only barely touches the solid portion of the surface, and therefore slides very easily on it. More generally, super-hydrophobic surfaces have been shown to lead to significant reduction of viscous friction in the laminar regime, so it is of interest to quantify their effective slipping properties as a function of their geometric characteristics. Most previous studies have considered flows bounded by arrays of either long grooves, or isolated solid pillars on an otherwise flat solid substrate, and for which therefore the surrounding air constitutes the continuous phase. Here we consider instead the case where the super-hydrophobic surface is made of isolated holes in an otherwise continuous no-slip surface, and specifically focus on the mesh-like geometry recently achieved experimentally. We present an analytical method to calculate the friction of such a surface in the case where the mesh is thin. The results for the effective slip length of the surface are computed, compared to simple estimates, and a practical fit is proposed displaying a logarithmic dependance on the area fraction of the solid surface.
title: A Practical Guide for Using Propensity Score Weighting in R
Creators: name: Olmos, Antonio
name: Govindasamy, Priyalatha
Publisher: name: University of Massachusetts Amherst
Year: 2015

description: Propensity score weighting is one of the techniques used in controlling for selection biases in non-experimental studies. Propensity scores can be used as weights to account for selection assignment differences between treatment and comparison groups. One of the advantages of this approach is that all the individuals in the study can be used for the outcomes evaluation. In this paper, we demonstrate how to conduct propensity score weighting using R. The purpose is to provide a step-by-step guide to propensity score weighting implementation for practitioners. In addition to strengths, some limitations of propensity score weighting are discussed. Accessed 24,338 times on https://pareonline.net from June 27, 2015 to December 31, 2019. For downloads from January 1, 2020 forward, please click on the PlumX Metrics link to the right.
On the nature of red galaxies: the Chandra perspective
Creators: name: Campisi, M. A.
name: Vignali, C.
name: Brusa, M.
name: Daddi, E.
name: Comastri, A.
name: Pozzetti, L.
name: Alexander, D. M.
name: Renzini, A.
name: Arimoto, N.
name: Kong, X.
Publisher: name: arXiv
Year: 2009
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: We present the X-ray properties of the extremely red objects (ERO) population observed by Chandra with three partially overlapping pointings (up to ~90 ks) over an area of ~500 arcmin^2, down to a 0.5-8 keV flux limit of ~10-15 erg cm-2 s-1. We selected EROs using a multi-band photometric catalog down to a KS-band magnitude of ~19.3 (Vega system); 14 EROs were detected in X-rays, corresponding to ~9% of the overall X-ray source population (149 X-ray sources) and to ~5% of the ERO population (288). The X-ray emission of all X-ray detected EROs is consistent with that of an active galactic nucleus (AGN) (>=3.5x10^{42} erg s-1 at photometric redshifts z > 1), in agreement with previous X-ray observations, with an indication of increasing absorption between the three X-ray brightest EROs and the 11 X-ray faintest EROs.We take advantage of the good spatial resolution and limited background provided by Chandra to place constraints on the population of the X-ray undetected EROs by a stacking analysis. Their stacked emission, whose statistical significance is 5.7sigma in the observed 0.5-8 keV band, provides an upper limit to the average intrinsic absorption at z=1 of 2.5x10^{22} cm^{-2} and corresponds to a rest-frame 0.5-8 keV luminosity of 8.9x10^{41} erg s^{-1} . We estimate that any accretion-related X-ray emission to the stacked signal is likely "diluted" by emission due to hot gas in normal galaxies and star-formation activity in dust-enshrouded galaxies at high redshift.
description: 16 pages, 9 figures, accepted A&A
Probing ultrafast symmetry breaking in photo-stimulated matter
Creators: name: Fausti, Daniele
name: Misochko, Oleg V.
name: van Loosdrecht, Paul H. M.
Publisher: name: arXiv
Year: 2009
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: The nature of a phase transition is inherently connected to the changes in the crystalline symmtry, which is typically probed by elastic or inelastic scattering with neutrons, electrons or photons. When such a phase transition is stimulated by light or other sudden perturbations the solid evolves along a non-equilibrium pathway of which the underlying physics is poorly understood. Here we use picosecond Raman scattering to study the photo-induced ultrafast dynamics in Peierls distorted Antimony. We find evidence for an ultrafast non-thermal reversible structural phase transition. Most surprisingly, we find evidence that this transition evolves toward a lower symmetry, in contrast to the commonly accepted rhombohedral-to-simple cubic transition path. Our study demonstrates the feasibility of ultrafast Raman scattering symmetry analysis of photo-induced non-thermal transient phases.
Holographic scalar mesons
Creators: name: Nicotri, Stefano
Publisher: name: arXiv
Year: 2009
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: A holographic description of scalar mesons is presented, in which two- and three-point functions are holographically reconstructed. Mass spectrum, decay constants, eigenfunctions and the coupling of the scalar states with two pseu- doscalars are found. A comparison of the results with current phenomenology is discussed.
description: 4 pages, talk given at IFAE 2009 (Incontri di Fisica delle Alte Energie 2009), Bari, Italy, 15-17 Apr 2009
title: Efficacy of propionic acid against the granary weevil Sitophilus granarius (L.)
Creators: name: Lorenz, S.
name: Schöller, M.
name: Reichmuth, C.
Publisher: name: Julius Kühn-Institut
Year: 2010
Subjects: subject: granary weevil
subject: Sitophilus granarius
subject: propionic acid
subject: control
subject: feed storage

description: Julius-Kühn-Archiv; 425; 906-909
Competencias comunicativas a través de los marcos de referencia de las lenguas
Creators: name: Hidalgo Downing, Raquel
Publisher: name: Fondazione Università Ca’ Foscari Venezia, Italia
Year: 2019

description:

In this paper, the didactic and training potential of the Reference Frameworks of Languages is studied and discussed, with special attention to the REFIC (Référentiel de compétences de communication plurilingue en intercompréhension). While elaboration and dissemination of such Frameworks of Reference have a not too long tradition in Europe, its impact has been such as to consolidate them as the main documents articulating the language teaching practices in European educational contexts. In the didactic paradigm of intercomprehension, the Referentials have undertaken the systematization of its theoretical-methodological foundations, as well as its evaluation practice. On a population of students specialized in language teaching, this study explores the use of the REFIC as a (self) assessment tool of communicative competences, didactic learning in a comparative study of frames, and reception analysis of the REFIC.

description: EL.LE
Zhu's algebra and the $C_2$-algebra in the symplectic and the orthogonal cases
Creators: name: Feigin, Evgeny
name: Littelmann, Peter
Publisher: name: arXiv
Year: 2009
Subjects: subject: Representation Theory (math.RT)
subject: High Energy Physics - Theory (hep-th)
subject: Algebraic Geometry (math.AG)
subject: FOS: Mathematics
subject: FOS: Physical sciences

description: We prove that Zhu's algebra and the $C_2$-algebra of type ${\tt C}_m$ have the same dimension, and we compute the graded character of the latter. Maximal parabolic subalgebras of the symplectic algebra play a central role in our construction. For the orthogonal algebras our methods do not allow to describe the whole $C_2$-algebras, we get only a description of a certain quotient of the algebra.
description: 19 pages
Un Référentiel de compétences de communication plurilingue en intercompréhension
Creators: name: De Carlo, Maddalena
name: Anquetil, Mathilde
Publisher: name: Fondazione Università Ca’ Foscari Venezia, Italia
Year: 2019

description:

Plurilingualism, as an individual resource and as an educational goal, is today a challenge launched by European policies and by the reality of educational environments. Through the development of their communicative competence, the latter feel the need to prepare their students to actively participate as full citizens in complex democratic societies and in a globalised world. The linguistic and cultural diversity that characterises these educational environments redoubles the interest for a plurilingual perspective to language teaching. A plural approach such as intercomprehension between related languages has proved to be a powerful catalyst for plurilingual education seeking to develop the linguistic, communicative and cultural repertoire of the individual, rather than the mastery of one or more languages. In this article we will propose a framework describing communicative competencies in intercomprehension for learners ant teachers as well (REFIC). This framework aims to provide a guide for programming and a basis for assessing competencies acquired in the context of a plurilingual approach to language learning such as intercomprehension.

description: EL.LE
title: Methods for examining the psychometric quality of subscores: A review and application
Creators: name: Wedman, Jonathan
name: Lyrén, Per-Erik
Publisher: name: University of Massachusetts Amherst
Year: 2015

description: When subscores on a test are reported to the test taker, the appropriateness of reporting them depends on whether they provide useful information above what is provided by the total score. Subscores that fail to do so lack adequate psychometric quality and should not be reported. There are several methods for examining the quality of subscores, and in this study seven such methods, four of which are based on classical test theory and three of which are based on item response theory, were reviewed and applied to empirical data. The data consisted of test takersâ€™ scores on four test forms â€“ two administrations of a first version of a college admission test and two administrations of a second version â€“ and the analyses were carried out on the subtest and section levels. The two section scores were found to have adequate psychometric quality with all methods used, whereas the results for subtest scores ranged from almost all scores having adequate psychometric quality to none having adequate psychometric quality. The authors recommend using Habermanâ€™s method and the related utility index because of their solid theoretical foundation and because of various issues with the other subscore quality methods. Accessed 4,596 times on https://pareonline.net from November 26, 2015 to December 31, 2019. For downloads from January 1, 2020 forward, please click on the PlumX Metrics link to the right.
Quantum Kolmogorov Complexity and Quantum Key Distribution
Creators: name: Miyadera, Takayuki
name: Imai, Hideki
Publisher: name: arXiv
Year: 2008
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We discuss the Bennett-Brassard 1984 (BB84) quantum key distribution protocol in the light of quantum algorithmic information. While Shannon's information theory needs a probability to define a notion of information, algorithmic information theory does not need it and can assign a notion of information to an individual object. The program length necessary to describe an object, Kolmogorov complexity, plays the most fundamental role in the theory. In the context of algorithmic information theory, we formulate a security criterion for the quantum key distribution by using the quantum Kolmogorov complexity that was recently defined by Vitányi. We show that a simple BB84 protocol indeed distribute a binary sequence between Alice and Bob that looks almost random for Eve with a probability exponentially close to 1.
description: typos corrected
title: Linear Logistic Test Modeling with R
Creators: name: Baghaei, Purya
name: Kubinger, Klaus D.
Publisher: name: University of Massachusetts Amherst
Year: 2015

description: The present paper gives a general introduction to the linear logistic test model (Fischer, 1973), an extension of the Rasch model with linear constraints on item parameters, along with eRm (an R package to estimate different types of Rasch models; Mair, Hatzinger, & Mair, 2014) functions to estimate the model and interpret its parameters. The applications of the model in test validation, hypothesis testing, cross-cultural studies of test bias, rule-based item generation, and investigating construct irrelevant factors which contribute to item difficulty are explained. The model is applied to an English as a foreign language reading comprehension test and the results are discussed. Accessed 7,390 times on https://pareonline.net from January 01, 2014 to December 31, 2019. For downloads from January 1, 2020 forward, please click on the PlumX Metrics link to the right.
Formação de formadores e intercompreensão
Creators: name: Andrade, Ana Isabel
name: Martins, Filomena
name: Pinho, Ana Sofia
Publisher: name: Fondazione Università Ca’ Foscari Venezia, Italia
Year: 2019

description:

Teacher education is a complex field, as it mobilises different knowledge domains, intervention contexts and multiple actors. The intervention in this field and the identification of the most adequate pathways to adopt, is perceived as difficult. With the purpose of providing support to tackle with such challenge, a teacher education framework for didactics of intercomprehension (REFDIC) was designed. In this chapter, we search to identify its research potential, based on the analysis of texts on the topic of intercomprehension in education processes written by school teachers in the context of pre- and in-service courses, which took place in Higher Education institutions in Portugal.

description: EL.LE
Grand Canonical Monte Carlo Simulation of Hydrogen Adsorption in Different Carbon Nano Structures
Creators: name: Luo, Tengfei
name: Lloyd, John R.
Publisher: name: arXiv
Year: 2009
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: Grand Canonical Monte Carlo (GCMC) simulations are performed to study hydrogen physisorption in different nano carbon porous materials made up of different substructures including carbon nanotubes (CNT), graphene sheets and C60. Hydrogen weight percentage (wt%) at different temperatures with pressure ranging from 1 to 20MPa are predicted. Fugacity and quantum effects on hydrogen adsorption are investigated. Different structural dimensions including the sizes of the substructures and spacing between the substructures are used to study the geometrical effects on hydrogen storage capacity in carbon materials. The calculated results generally agree well with available data from other calculations. It is concluded that CNT arrays, graphite nanofibers (GNF) and C60 intercalated graphite (CIG) are not promising to reach the DOE 6.5 wt% target at room temperature. It is also found that the quantum effect is significant in low temperature hydrogen adsorption and different treatments to account for the quantum effect also influence the predicted wt% differently.
description: 20 pages, 17 figures
title: Linking Errors Between Two Populations and Tests: A Case Study in International Surveys in Education
Creators: name: Hastedt, Dirk
name: Desa, Deana
Publisher: name: University of Massachusetts Amherst
Year: 2015

description: This simulation study was prompted by the current increased interest in linking national studies to international large-scale assessments (ILSAs) such as IEAâ€™s TIMSS, IEAâ€™s PIRLS, and OECDâ€™s PISA. Linkage in this scenario is achieved by including items from the international assessments in the national assessments on the premise that the average achievement scores from the latter can be linked to the international metric. In addition to raising issues associated with different testing conditions, administrative procedures, and the like, this approach also poses psychometric challenges. This paper endeavors to shed some light on the effects that can be expected, the linkage errors in particular, by countries using this practice. The ILSA selected for this simulation study was IEA TIMSS 2011, and the three countries used as the national assessment cases were Botswana, Honduras, and Tunisia, all of which participated in TIMSS 2011. The items selected as items common to the simulated national tests and the international test came from the Grade 4 TIMSS 2011 mathematics items that IEA released into the public domain after completion of this assessment. The findings of the current study show that linkage errors seemed to achieve acceptable levels if 30 or more items were used for the linkage, although the errors were still significantly higher compared to the TIMSSâ€™ cutoffs. Comparison of the estimated country averages based on the simulated national surveys and the averages based on the international TIMSS assessment revealed only one instance across the three countries of the estimates approaching parity. Also, the percentages of students in these countries who actually reached the defined benchmarks on the TIMSS achievement scale differed significantly from the results based on TIMSS and the results for the simulated national assessments. As a conclusion, we advise against using groups of released items from international assessments in national assessments in order to link the results of the former to the latter. Accessed 3,870 times on https://pareonline.net from June 29, 2015 to December 31, 2019. For downloads from January 1, 2020 forward, please click on the PlumX Metrics link to the right.