cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Quantum statistical mechanics of gases in terms of dynamical filling fractions and scattering amplitudes
Creators: name: LeClair, André
Publisher: name: arXiv
Year: 2006
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We develop a finite temperature field theory formalism in any dimension that has the filling fractions as the basic dynamical variables. The formalism efficiently decouples zero temperature dynamics from the quantum statistical sums. The zero temperature `data' is the scattering amplitudes. A saddle point condition leads to an integral equation which is similar in spirit to the thermodynamic Bethe ansatz for integrable models, and effectively resums infinite classes of diagrams. We present both relativistic and non-relativistic versions.
Ο ΣΥΝΤΕΛΕΣΤΗΣ ΜΕΤΑΒΛΗΤΟΤΗΤΑΣ: Μελέτη κατανομών και διορθώσεις μεροληψίας:
Creators: name: Μπαλαμπούτη, Αικατερίνη Γεωργίου
Publisher: name: Aristotle University of Thessaloniki
Year: 2014
Subjects: Κοινωνικά Δίκτυα
Συντελεστής Μεταβλητότητας,
Μελέτη Κατανομών
Social Media
Coefficient of Variation
Distributions Study

description: Ζούμε πλέον στην εποχή του σύγχρονου ψηφιακού κόσμου. Το Διαδίκτυο και τα Μέσα Κοινωνικής Δικτύωσης αποτελούν μέρος της καθημερινής δραστηριότητας για τον μέσο Έλληνα και κυρίως για τον μέσο Έλληνα μαθητή. Η παρούσα εργασία καλείται να δώσει απαντήσεις στο ποια είναι η σχέση του σύγχρονου μαθητή με το Διαδίκτυο και τα Μέσα Κοινωνικής Δικτύωσης. Με τη βοήθεια ενός ερωτηματολογίου που συμπλήρωσαν μαθητές Λυκείου του Ν. Ημαθίας γίνεται προσπάθεια σκιαγράφησης του προφίλ των μαθητών και των Διαδικτυακών του συνηθειών. Για το λόγο αυτό η παρούσα εργασία επεξεργάζεται στατιστικά τις τυχαίες μεταβλητές που προκύπτουν μέσα από το ερωτηματολόγιο. Σε κάθε μεταβλητή υπολογίζονται τα στατιστικά μέτρα, μέση τιμή, διασπορά και συντελεστής μεταβλητότητας. Απώτερος στόχος αποτελεί η ανάδειξη του Συντελεστή Μεταβλητότητας ως εργαλείου για τη μελέτη κατανομών και την προσέγγιση της συνάρτησης πυκνότητας πιθανότητας των αντίστοιχων μεταβλητών. Παράλληλα γίνεται προσπάθεια χρήσης του ως εργαλείο για τη διόρθωση μεροληψίας.
description: We live in the era of the modern digital world. The Web and the Social Media are part of our daily activity for the average Greek man and Greek student. This present project is to give answers who is the relationship of the modern student with the Web and the Social Media. With the help a questionnaire which was completed by the students of High School of the State of Imathia make an effort to outline the profile of students and their Web habits. For this reason this present project processes statically the random variables which arise by the questionnaire. For each variable compute the statically measures, average, variation and coefficient of variation. The ultimate goal is to underline the Coefficient of Variation as a tool for the study of distributions
New social space : concepts of aging and transformation learning
Creators: name: Shaw, Muriel Edith
Publisher: name: University of British Columbia
Year: 2009

description: The focus of this masters thesis in educational gerontology was to explore guided autobiography, life review and reminiscence, as a means of engaging in transformative learning as it contributes to successful aging. From the perspective of developmental psychology I hold a positive view of aging in terms of psychological growth in wisdom and understanding across the entire life span. A crucial aspect of successful aging is that older adults have meaningful social roles in their work and relationships. Negative attitudes about aging and the aged, an underlying theme in ageism, can be an invisible barrier to successful aging. With this in mind I examined major paradigms in psychology in the twentieth century, as they relate to a positive growth model of aging. In particular, the psychoanalytic, humanistic and cognitive behavioural paradigms, along with the medical model and a wellness perspective about aging, were examined. Moreover, the possibilities for a model of transformative learning of which guided autobiography, life review and reminiscence are one methodology were explored.
Kinematic Properties of Young Intermediate- and Low-Mass Stars from the Gaia DR2 Catalogue
Creators: name: Bobylev, V. V.
name: Bajkova, A. T.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: We have studied the kinematic properties of young pre-main-sequence stars. We have selected these stars based on data from the Gaia DR2 catalogue by invoking a number of photometric infrared surveys. Using 4564 stars with parallax errors less than 20\%, we have found the following parameters of the angular velocity of Galactic rotation: $Ω_0 =28.84\pm0.10$ km s$^{-1}$ kpc$^{-1}$, $Ω^{'}_0=-4.063\pm0.029$ km s$^{-1}$ kpc$^{-2}$ and $Ω^{''}_0=0.766\pm0.020$ km s$^{-1}$ kpc$^{-3}$, where the Oort constants are $A=16.25\pm0.33$ km s$^{-1}$ kpc$^{-1}$ and $B=-12.58\pm0.34$ km s$^{-1}$ kpc$^{-1}$. The circular rotation velocity of the solar neighborhood around the Galactic center is $V_0=230.7\pm4.4$ km s$^{-1}$ for the adopted Galactocentric distance of the Sun $R_0=8.0\pm0.15$ kpc. The residual velocity dispersion for the stars considered is shown to be low, suggesting that they are extremely young. The residual velocity dispersion averaged over three coordinates is $\sim$11 km s$^{-1}$ for Herbig Ae/Be stars and $\sim$7 km s$^{-1}$ for T Tauri stars.
description: 12 pages, 3 figures and 2 tables
Examples of cohomology manifolds which are not homologically locally connected
Creators: name: Karimov, Umed H.
name: Repovš, Dušan
Publisher: name: arXiv
Year: 2008
Subjects: subject: Algebraic Topology (math.AT)
subject: Geometric Topology (math.GT)
subject: FOS: Mathematics
subject: 55Q05; 57P05,

description: Bredon has constructed a 2-dimensional compact cohomology manifold which is not homologically locally connected, with respect to the singular homology. In the present paper we construct infinitely many such examples (which are in addition metrizable spaces) in all remaining dimensions $n \ge 3$.
Molecular Dynamics Simulation for the Analysis of Mechanical Properties and Effect of Stone-Wales and BiVacancy Defect on Carbon Nanotube Reinforced Iron Composites
Creators: name: Ishraaq, Raashiq
name: Chhetri, Santosh
name: Gautam, Omkar
name: Nahid, Shahriar Muhammad
name: Afsar, A. M
Publisher: name: arXiv
Year: 2020
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Carbon nanotube (CNT) reinforced metal matrix composites (MMCs) are gaining the attention of the researchers because of their demand in space and automobile industries for having low weight and high mechanical properties. Iron is the most used metal in all engineering fields. Therefore, reinforcing iron with CNT can reduce its required amount, which might have a positive economic impact due to the reduced cost of production. However, before the industrial application of any material the mechanical properties under different conditions must be known. In this study, the mechanical properties of iron reinforced separately with single, double and triple wall CNTs are investigated by Molecular Dynamics (MD) simulation. The study revealed that the strength and stiffness of pure iron could be enhanced up to 80.4 % and 57.4 %, respectively, by adding CNTs into iron. We also investigated the effect of fiber volume percentage and temperature on the mechanical properties of the composite having single, double and triplewalled carbon nanotubes individually. As the stone-wales and bi-vacancy defects are inherently introduced in CNTs during manufacturing, their effect on mechanical properties are also investigated in the present study
description: The following article has been accepted by American Institute of Physics. After it is published, it will be found at https://aip.scitation.org/journal/apc
Whipple Telescope Observations of LS I +61 303: 2004-2006
Creators: name: Smith, Andy
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: In this paper we present the results of the past two years' observations on the galactic microquasar LS I +61 303 with the Whipple 10m gamma-ray telescope. The recent MAGIC detection of the source between 200 GeV and 4 TeV suggests that the source is periodic with very high energy (VHE) gamma-ray emission linked to its orbital cycle. The entire 50-hour data set obtained with Whipple from 2004 to 2006 was analyzed with no reliable detection resulting. The upper limits obtained in the 2005-2006 season covered several of the same epochs as the MAGIC Telescope detections, albeit with lower sensitivity. Upper limits are placed on emission during the orbital phases of 0->0.1 and 0.8->1, phases which are not included in the MAGIC data set.
description: 4 pages, 5 figures, To appear in Astrophysics and Space Science (Proceedings of "The multimessenger approach to unidentified gamma-ray sources")
An exact study of charge-spin separation, pairing fluctuations and pseudogaps in four-site Hubbard clusters
Creators: name: Kocharian, Armen N.
name: Fernando, Gayanath W.
name: Palandage, Kalum
name: Davenport, James W.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: An exact study of charge-spin separation, pairing fluctuations and pseudogaps is carried out by combining the analytical eigenvalues of the four-site Hubbard clusters with the grand canonical and canonical ensemble approaches in a multidimensional parameter space of temperature (T), magnetic field (h), on-site interaction (U) and chemical potential. Our results, near the average number of electrons =3, strongly suggest the existence of a critical parameter U_{c}(T) for the localization of electrons and a particle-hole binding (positive) gap at U>U_{c}(T), with a zero temperature quantum critical point, U_{c}(0)=4.584. For UU_c(T) and the cluster becomes a Mott-Hubbard like insulator due to the presence of energy gaps at all (allowed) integer numbers of electrons. In contrast, for U< U_c(T), we find an electron pair binding instability at finite temperature near =3, which manifests a possible pairing mechanism, a precursor to superconductivity in small clusters. In addition, the resulting phase diagram consisting of charge and spin pseudogaps, antiferromagnetic correlations, hole pairing with competing hole-rich (=2), hole-poor (=4) and magnetic (=3) regions in the ensemble of clusters near 1/8 filling closely resembles the phase diagrams and inhomogeneous phase separation recently found in the family of doped high T_c cuprates.
description: 10 pages, 7 figures
Using inter- and intra-species gene copy number variation to identify genes involved in xenobiotic metabolism in parasitic nematodes
Creators: name: Curran, Dave
name: Gilleard, John
name: Wasmuth, James
Publisher: name: F1000Research
Year: 2015

description: Parasitic nematodes are estimated to infect one third of the human population, causing death and morbidity, while others that infect livestock cause billions of dollars of economic loss annually. They are traditionally controlled using drugs, but resistance has arisen rapidly and has spread across the globe. Studies on the mechanisms of nematode drug resistance have primarily focused on mutations to the drug target, while much less is known about how they metabolize and excrete drugs. In insects, virtually all resistance to DDT is due to an up-regulation in a single cytochrome P450 (cyp), the first step in the drug metabolism pathway (DMP). Historically it has been thought that parasitic nematodes had lost their DMP genes, but recently sequenced genomes challenge this and show the reality is more complex.

We are focusing on six species: four free-living species, the livestock parasite Haemonchus contortus, and the human hookworm Necator americanus. Our goal is to identify the DMP genes in these species and use phylogenomic approaches to distinguish between those that metabolise endogenous and xenobiotic biochemicals. Enzymes with xenobiotic substrates tend to be under distinctive selective pressure; we hypothesize that those genes stable across species will be important for cellular processes, and as such constitute good therapeutic targets, while those exhibiting higher gain/loss or sequence divergence might be important DMP genes, and so play a role in drug resistance. Some results are presented, as well as software to detect divergent gene families and a web tool to analyze copy number variation in a population of wild C. elegans isolates.
Palladium Zero-Mode Waveguides for Optical Single Molecule Detection with Nanopores
Creators: name: Klughammer, Nils
name: Dekker, Cees
Publisher: name: arXiv
Year: 2020
Subjects: subject: Applied Physics (physics.app-ph)
subject: FOS: Physical sciences

description: Holes in metal films block any transmitting light if the wavelength is much larger than the hole diameter, establishing such nanopores as so-called Zero Mode Waveguides (ZMWs). Molecules on the other hand, can still passage through these holes. We use this to detect individual fluorophore-labelled molecules as they travel through a ZMW and thereby traverse from the dark region to the illuminated side, upon which they emit fluorescent light. This is beneficial both for background suppression and to prevent premature bleaching. We use palladium as a novel metal-film material for ZMWs, which is advantageous compared to conventionally used metals. We demonstrate that it is possible to simultaneously detect translocations of individual free fluorophores of different colors. Labeled DNA and protein biomolecules can be detected as well at the single-molecule level with a high signal-to-noise ratio and at high bandwidth, which opens the door to a variety of single-molecule biophysics studies.
description: submitted to journal
The nuclear spin-lattice relaxation rate in the PuMGa$_5$ materials
Creators: name: Bang, Yunkyu
name: Graf, M. J.
name: Curro, N. J.
name: Balatsky, A. V.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: We examine the nuclear spin-lattice relaxation rates $1/T_1$ of PuRhGa$_5$ and PuCoGa$_5$, both in the superconducting and normal states, as well as their Knight shifts. Results for both compounds are consistent with a superconducting gap of d-wave symmetry in the presence of strong impurity scattering, though with quite different gap-over-$T_c$ ratios $2 Δ_{0}/ k_B T_c$ (8 for PuCoGa$_5$ and 5 for PuRhGa$_5$). In the normal state, PuRhGa$_5$ exhibits a gradual suppression of $(T_1 T)^{-1}$ below 25 K, while measurements for PuCoGa$_5$ reveal a monotonic increase down to $T_c$. We propose that this behavior is consistently understood by the crossover from the two-dimensional quantum antiferromagnetic regime of the local $5f$-electron spins of Pu to the concomitant formation of the fermion pseudogap based on the two-component spin-fermion model.
description: 7 pages, 6 figures, minor changes and references added
Water abundance at the surface of C-complex main-belt asteroids
Creators: name: Beck, Pierre
name: Eschrig, Jolantha
name: Potin, Sandra
name: Prestgard, Trygve
name: Bonal, Lydie
name: Quirico, Eric
name: Schmitt, Bernard
Publisher: name: arXiv
Year: 2020
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: FOS: Physical sciences

description: Recently published space-based observations of main-belt asteroids with the AKARI telescope provide a full description of the 3 μm band, related to the presence of OH bearing minerals. Here, we use laboratory spectra of carbonaceous chondrites obtained under controlled atmosphere (CI,CM,CO,CV,CR Tagish Lake) to derive spectral metrics related to the water content in the samples. After testing several spectral metrics, we use a combination of band depth at 2.75 μm and 2.80 μm that shows a correlation with [H2O] in the sample determined by TGA, though with a high uncertainty (4 wt% H2O). This relation is used to determine water content at the surface of large C-complex main-belt asteroids and discuss the origin of the variability found. On average C-complex Main-Belt Asteroids (MBA) have water contents of 4.5 wt% (volume average, (1) Ceres excluded), significantly lower than average CM chondrites. The estimated water content for the most hydrated asteroids are lower than those of the most hydrated meteorites, a difference that could be attributed to space-weathering. An anti-correlation is also present between water content and overall spectral slope, which is opposite to expectation from laboratory simulations of space weathering on dark carbonaceous chondrites. This suggests that part of the variability in the surface hydration among the different C-complex asteroids is not due to space-weathering, but to the composition of surface material. When applied to Ceres, the hygrometer presented in this work enables us to estimate that at least 1.22 wt% of the hydrogen is present in the form of organics. This richness in organics strengthens the connection between Ceres and cometary materials.
Minimum Viable Model Estimates for Machine Learning Projects
Creators: name: Hawkins, John
Publisher: name: arXiv
Year: 2021
Subjects: subject: Machine Learning (cs.LG)
subject: Software Engineering (cs.SE)
subject: FOS: Computer and information sciences
subject: I.2.6; I.5.2
subject: 68T01

description: Prioritization of machine learning projects requires estimates of both the potential ROI of the business case and the technical difficulty of building a model with the required characteristics. In this work we present a technique for estimating the minimum required performance characteristics of a predictive model given a set of information about how it will be used. This technique will result in robust, objective comparisons between potential projects. The resulting estimates will allow data scientists and managers to evaluate whether a proposed machine learning project is likely to succeed before any modelling needs to be done. The technique has been implemented into the open source application MinViME (Minimum Viable Model Estimator) which can be installed via the PyPI python package management system, or downloaded directly from the GitHub repository. Available at https://github.com/john-hawkins/MinViME
description: 11 pages, 4 figures
Ethnic Detectives in der deutschsprachigen Literatur.:
Creators: name: Κρέμερ, Μαριαλένα Νόρμερτ Γιόχαν Αλόις
Publisher: name: Aristotle University of Thessaloniki
Year: 2014
Subjects: Ethnic
Detective
Διαπολιτισμικότητα
Transcultural

description: Σκοπός της παρούσας διπλωματικής εργασίας ήταν η αντικατάσταση του όρου ‘ethnic detective’ με αυτόν του ‘transcultural detective’, διότι ο πρώτος δεν ανταποκρίνεται στον ίδιο βαθμό στις συνθήκες που επικρατούν στην Γερμανία, όπως σ’ αυτές των Ηνωμένων Πολιτειών. Για να έρθει εις πέρας αυτό το εγχείρημα χρησιμοποιήθηκαν ως παράδειγμα έξι μυθιστορήματα των συγγραφέων Γιάκομπ Αρζούνι, Χάινριχ Στάινφεστ, Ρόσα Ρίμπας και Σου Τούρχαν. Τα κείμενα επεξεργάστηκαν, ερμηνεύτηκαν και στηρίχταν με σχετική βιβλιογραφία και θεωρίες για παράδειγμα από τους Στέφεν Σόιτος και Άντριου Πέππερ. Επιπλέον για την καλύτερη κατάνοηση του θέματος εμπλουτίστηκε η διπλωματική εργασία με μια ιστορική αναδρομή και με επεξηγήσεις των όρων εθνότητα, πολυπολιτισμικότητα και διαπολιτισμικότητα.
description: The aim of the present master thesis was to substitute the term ‘ethnic detective’ with the term ‘transcultural detective’ as the former cannot be applied to German conditions to the same extent as to American conditions. In order to successfully carry out this effort six exemplary novels have been used by the authors Jakob Arjouni, Heinrich Steinfest, Rosa Ribas and Su Turhan. They have been interpreted and attested based on relevant theories by – amongst others– Stephen Soitos and Andrew Pepper. Moreover this master thesis has been complemented with a historical overview and with illustrations of the terms ethnicity, interculturality, multiculturality and transculturality.
MILP-based Imitation Learning for HVAC control
Creators: name: Dinh, Huy Truong
name: Kim, Daehee
Publisher: name: arXiv
Year: 2020
Subjects: subject: Machine Learning (cs.LG)
subject: Systems and Control (eess.SY)
subject: FOS: Computer and information sciences
subject: FOS: Electrical engineering, electronic engineering, information engineering

description: To optimize the operation of a HVAC system with advanced techniques such as artificial neural network, previous studies usually need forecast information in their method. However, the forecast information inevitably contains errors all the time, which degrade the performance of the HVAC operation. Hence, in this study, we propose MILP-based imitation learning method to control a HVAC system without using the forecast information in order to reduce energy cost and maintain thermal comfort at a given level. Our proposed controller is a deep neural network (DNN) trained by using data labeled by a MILP solver with historical data. After training, our controller is used to control the HVAC system with real-time data. For comparison, we also develop a second method named forecast-based MILP which control the HVAC system using the forecast information. The performance of the two methods is verified by using real outdoor temperatures and real day-ahead prices in Detroit city, Michigan, United States. Numerical results clearly show that the performance of the MILP-based imitation learning is better than that of the forecast-based MILP method in terms of hourly power consumption, daily energy cost, and thermal comfort. Moreover, the difference between results of the MILP-based imitation learning method and optimal results is almost negligible. These optimal results are achieved only by using the MILP solver at the end of a day when we have full information on the weather and prices for the day.
description: 10 pages, 14 figures
Aξιοποίηση νέων τεχνολογιών για τη συλλογή και επεξεργασία κυκλοφοριακών μεγεθών για αυτοκινητοδρόμους
Creators: name: Αντωνιάδης, Χρήστος-Νεκτάριος Κωνσταντίνου
Publisher: name: Aristotle University of Thessaloniki
Year: 2014
Subjects: Συστήματα Ευφυών Μεταφορών
Κυκλοφοριακά δεδομένα
Μέτρηση κυκλοφοριακών δεδομένων
Ιntelligent Transportation Systems
Traffic Data
Traffic Data Measurement

description: Μέσω της παρούσας εργασίας, η οποία πραγματεύεται το θέμα των νέων τεχνολογιών για τη συλλογή και επεξεργασία κυκλοφοριακών δεδομένων, γίνεται προσπάθεια σφαιρικής κάλυψης των μετρήσεων κυκλοφοριακών δεδομένων σε όλα τα στάδια, με έμφαση στα νέα και τεχνολογικά εξελιγμένα μέσα των Συστημάτων Ευφυών Μεταφορών, τα οποία είναι ένας συνδυασμός τεχνολογιών πληροφόρησης και επικοινωνιών εφαρμοσμένων στον τομέα των μεταφορών με στόχο την αποδοτικότερη ασφαλέστερη και οικονομικότερη κυκλοφορία των ατόμων ή των εμπορευμάτων κάνοντας χρήση νέων τεχνολογιών.Στόχος της εργασίας, λοιπόν, είναι να μελετηθούν εκτενώς τα εν λόγω Συστήματα, να παρουσιαστούν όλες οι πτυχές αυτών, όπως τα πλεονεκτήματα χρήσης αυτών, οι τομείς εφαρμογής και κυρίως οι προοπτικές εξέλιξής τους και ευρύτερης χρήσης τους ιδιαίτερα στον ελλαδικό χώρο.
description: Through this work, which deals with the issue of new technologies in the area of collection and processing traffic data, an attempt is made to comprehensively cover traffic measurement data at all stages, with emphasis on new and technologically advanced means of ITS. These systems comprise a combination of information and communication technologies applied to the transport sector in order to secure efficient and economical movement of people and goods using new technologies.The aim of the present theses is, therefore, the in-depth investigation of these systems, the presentation of all their aspects, such as the advantages of their use, their area of application and especially their prospects of development and wider use particularly in Greece.
Οι απόψεις των εκπαιδευτικών σχετικά με τη γλωσσική επάρκεια και η γλωσσική επίδοση μαθητών Ε’ δημοτικού με μαθησιακές δυσκολίες:
Creators: name: Φούσκα, Μάλαμα Σταύρου
Publisher: name: Aristotle University of Thessaloniki
Year: 2014
Subjects: μαθησιακές δυσκολίες
γλωσσική επάρκεια
εκπαιδευτικοί
learning disabled
language competence
teachers

description: Ένα από τα καθημερινά ζητήματα που αντιμετωπίζουν οι εκπαιδευτικοί στο χώρο του σχολείου είναι οι μαθησιακές δυσκολίες και κατά πόσο αυτές επηρεάζουν την διαδικασία εκμάθησης των μαθητών. Στην παρούσα διπλωματική εξετάζεται η επίδραση των μαθησιακών δυσκολιών στην σχολική επίδοση των μαθητών. Οι μαθησιακές δυσκολίες μπορούν να επηρεάσουν την ικανότητα του εγκεφάλου να λαμβάνει, να επεξεργάζεται, να αποθηκεύει, να ανταποκρίνεται και να μεταβιβάζει τις πληροφορίες. . Οι μαθητές με μαθησιακές δυσκολίες έχουν μέσο ή άνω του μέσου δείκτη νοημοσύνης, αλλά εξακολουθούν να αγωνίζονται για να αποκτήσουν ορισμένες δεξιότητες που επηρεάζουν τις επιδόσεις τους στο σχολείο. Όσο πιο γρήγορα εντοπιστούν, τόσο πιο γρήγορα μπορούν εν μέρει να αντιμετωπιστούν. Η παρούσα μελέτη επιδιώκει να αναλύσει την επίδραση των μαθησιακών δυσκολιών στην γλωσσική επίδοση των μαθητών της Ε’ δημοτικού, καθώς τις απόψεις των εκπαιδευτικών να εντοπίσουν μαθητές με μαθησιακές δυσκολίες. Εντοπίζονται δυσκολίες στο διαχωρισμό των μαθητών με μαθησιακές δυσκολίες που έχουν χαμηλή επίδοση, από εκείνους που έχουν χαμηλή επίδοση και δεν έχουν μαθησιακές δυσκολίες.
description: One of the everyday issues that teachers face at school concerns learning disabilities and the extent in which they affect the learning process. The present paper studies the impact of learning disabilities in students’ performance at school. Learning disabilities can affect the brain’s skill to receive, analyze, store, react to and transmit information.Students with learning disabilities display an average or high ΙQ, but they still struggle to acquire certain skills which affect their performance at school. The sooner such disabilities are recognized the higher the chances are that they will be effectively dealt with. The present study aims to analyze the effect of learning disabilities on the verbal performance of 5th graders, along with the teachers’ opinions, in discovering students with such disabilities. There are difficulties in distinguishing students with learning disabilities who have a poor performance from those who do not have learning disabilities but show a poor performance.
MPEC 2023-Y111 : DAILY ORBIT UPDATE (2023 December 31)
Creators: name: Minor Planet Center Staff
Publisher: name: The Minor Planet Center
Year: 2023
Subjects: subject: Small Solar System bodies
valueUri: http://astrothesaurus.org/uat/1469

description: The Minor Planet Electronic Circulars contain information on unusual minor planets, routine data on comets and natural satellites, and occasional editorial announcements.  They are published on behalf of Division F of the International Astronomical Union by the Minor Planet Center, Smithsonian Astrophysical Observatory, Cambridge, MA 02138, U.S.A.
Energy conditions in $f(Q,T)$ gravity
Creators: name: Arora, Simran
name: Sahoo, P. K.
Publisher: name: arXiv
Year: 2020
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: The recently proposed $f(Q, T)$ gravity (Xu et al. Eur. Phys. J. C \textbf{79} (2019) 708) is an extension of the symmetric teleparallel gravity. The gravitational action $L$ is given by an arbitrary function $f$ of the non-metricity $Q$ and the trace of the matter-energy momentum tensor $T$. In this paper, we examined the essence of some well prompted forms of $f(Q,T)$ gravity models i.e. $f(Q,T)= mQ+bT$ and $f(Q,T)= m Q^{n+1}+b T$ where $m$, $b$, and $n$ are model parameters. We have used the proposed deceleration parameter, which predicts both decelerated and accelerated phases of the Universe, with the transition redshift by recent observations and obtains energy density ($ρ$) and pressure ($p$) to study the various energy conditions for cosmological models. The equation of state parameter ($ω\simeq -1$) in the present model also supports the accelerating behavior of the Universe. In both, the models, the null, weak, and dominant energy conditions are obeyed with violating strong energy conditions as per the present accelerated expansion.
description: Published version in Physica Scripta
Back-stepping, hidden substeps, and conditional dwell times in molecular motors
Creators: name: Tsygankov, Denis
name: Lindén, Martin
name: Fisher, Michael E.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Biomolecules (q-bio.BM)
subject: FOS: Biological sciences

description: Processive molecular motors take more-or-less uniformly sized steps, along spatially periodic tracks, mostly forwards but increasingly backwards under loads. Experimentally, the major steps can be resolved clearly within the noise but one knows biochemically that one or more mechanochemical substeps remain hidden in each enzymatic cycle. In order to properly interpret experimental data for back/forward step ratios, mean conditional step-to-step dwell times, etc., a first-passage analysis has been developed that takes account of hidden substeps in $N$-state sequential models. The explicit, general results differ significantly from previous treatments that identify the observed steps with complete mechanochemical cycles; e.g., the mean dwell times $τ_+$ and $τ_-$ prior to forward and back steps, respectively, are normally {\it unequal} although the dwell times $τ_{++}$ and $τ_{--}$ between {\it successive} forward and back steps are equal. Illustrative (N=2)-state examples display a wide range of behavior. The formulation extends to the case of two or more detectable transitions in a multistate cycle with hidden substeps.
Learning to be proud : First Nations women’s stories of learning, teaching, art and culture
Creators: name: Miller, Lorrie
Publisher: name: University of British Columbia
Year: 2009

description: Six First Nations women artists tell their stories about learning their art and culture. Previous research has paid little attention to the learning experiences of First Nation women artists. Ethnographic research methods were used in this qualitative study. Field research included video and audio recorded intensive open-ended interviews with three Coastal Salish women from Sechelt, British Columbia, and three Cree women from Pukatawagan, Manitoba, as they tel l how essential learning and teaching, art and culture are to them, their children and their communities. This study shows that there is a need for curricular reform and teacher education reform so that the school experiences for First Nations students will reflect and be sensitive to their histories, traditions and overall cultural identities. From testimonies presented in this thesis, it is evident that effective teaching of relevant cultural art content that results in meaningful learning leads to increased self knowledge, confidence and pride.
Modelling the earth's geomagnetic environment on Cray machines using PETSc and SLEPc
Creators: name: Brown, Nick
name: Bainbridge, Brian
name: Beggan, Ciarán
name: Macmillan, Susan
name: Brown, William
name: Hamilton, Brian
Publisher: name: arXiv
Year: 2020
Subjects: subject: Distributed, Parallel, and Cluster Computing (cs.DC)
subject: Geophysics (physics.geo-ph)
subject: FOS: Computer and information sciences
subject: FOS: Physical sciences

description: The British Geological Survey's global geomagnetic model, Model of the Earth's Magnetic Environment (MEME), is an important tool for calculating the earth's magnetic field, which is continually in flux. Whilst the ability to collect data from ground based observation sites and satellites has grown, the memory bound nature of the code has proved a limitation in modelling problem sizes required by modern science. In this paper we describe work replacing the bespoke, sequential, eigen-solver with that of the SLEPc package for solving the system of normal equations. This work had a dual purpose, to break through the memory limit of the code, and thus support the modelling of much larger systems, by supporting execution on distributed machines, and to improve performance. But when adopting SLEPc it was not just the solving of the normal equations, but also fundamentally how we build and distribute the data structures. We describe an approach for building symmetric matrices in a way that provides good load balance and avoids the need for close co-ordination between processes or replication of work. We also study the memory bound nature of the code and combine detailed profiling with software cache prefetching to significantly optimise. Performance and scaling are explored on ARCHER, a Cray XC30, where we achieve a speed up for the solver of 294 times by replacing the model's bespoke approach with SLEPc. This work also provided the ability to model much larger system sizes, up to 100,000 model coefficients. Some of the challenges of modelling systems of this large scale are explored, and mitigations including hybrid MPI+OpenMP along with the use of iterative solvers are also considered. The result of this work is a modern MEME model that is not only capable of simulating problem sizes demanded by state of the art geomagnetism but also acts as further evidence to the utility of the SLEPc libary.
description: This is the pre-peer reviewed version of the following article: Modelling the earth's geomagnetic environment on Cray machines using PETSc and SLEPc, which has been published in final form at http://dx.doi.org/10.1002/cpe.5660
Fundamental Physics with High-Energy Cosmic Neutrinos
Creators: name: Ackermann, Markus
name: Ahlers, Markus
name: Anchordoqui, Luis
name: Bustamante, Mauricio
name: Connolly, Amy
name: Deaconu, Cosmin
name: Grant, Darren
name: Gorham, Peter
name: Halzen, Francis
name: Karle, Albrecht
name: Kotera, Kumiko
name: Kowalski, Marek
name: Mostafa, Miguel A.
name: Murase, Kohta
name: Nelles, Anna
name: Olinto, Angela
name: Romero-Wolf, Andres
name: Vieregg, Abigail
name: Wissel, Stephanie
Publisher: name: Deutsches Elektronen-Synchrotron, DESY, Hamburg
Year: 2019

description: High-energy cosmic neutrinos can reveal new fundamental particles and interactions, probing energy and distance scales far exceeding those accessible in the laboratory. This white paper describes the outstanding particle physics questions that high-energy cosmic neutrinos can address in the coming decade. A companion white paper discusses how the observation of cosmic neutrinos can address open questions in astrophysics. Tests of fundamental physics using high-energy cosmic neutrinos will be enabled by detailed measurements of their energy spectrum, arrival directions, flavor composition, and timing.
The role of mentorship in enhancing academic proficiency : Motivational dispostion and learning satisfaction in academically gifted children
Creators: name: Simpson, Brenda Gladys Huldis
Publisher: name: University of British Columbia
Year: 2009

description: According to research, the academically gifted child may not have his/her educational needs met in a classroom with his/her age mates. This study was an investigation of the impact of mentorship on academically gifted students in an attempt to adjust curriculum to reflect what the identified gifted child i s ready to learn. There is little theoretically-based research on the impact of mentorship on children with advanced academic capabilities. It was hypothesized that academically gifted students who received individualized instruction from a mentor would show positive changes i n motivation and that this teaching approach would further enhance their academic proficiency. Learning satisfaction would also be a result of participation in a mentorship program. A multi-case study methodology was employed, including four identified gifted students. Replication of results across cases illustrates an overall improvement in academic competency and motivation. The children involved learned a great deal, evolved as motivated students and had a noticeable sense of satisfaction from participating in the program. Conclusions justify the need for curriculum modification for academically advanced children.
Manifestly-covariant chiral PT calculation of nucleon Compton scattering
Creators: name: Lensky, Vadim
name: Pascalutsa, Vladimir
Publisher: name: arXiv
Year: 2008
Subjects: subject: Nuclear Theory (nucl-th)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We compute the Compton scattering off the nucleons in the framework of manifestly covariant baryon chiral perturbation theory (B$χ$PT). The results for observables differ substantially from the corresponding calculations in heavy-baryon chiral perturbation theory (HB$χ$PT), most appreciably in the forward kinematics. We verify that the covariant $p^3$ result fulfills the forward-Compton-scattering sum rules. We also explore the effect of the $Δ$(1232) resonance at order $p^4/\varDelta$, with $\varDelta\approx 300$ MeV, the resonance excitation energy. We find that the substantial effect of the $Δ$-excitation on the nucleon polarizabilities can naturally be accommodated in the manifestly covariant calculation.
description: 6 pages, 4 figures, REVTeX; Major revision, the effect of Delta is computed entirely to order p^4 over the Delta-nulceon mass difference
Graph-based Model of Smart Grid Architectures
Creators: name: Klaer, Benedikt
name: Sen, Ömer
name: van der Velde, Dennis
name: Hacker, Immanuel
name: Andres, Michael
name: Henze, Martin
Publisher: name: arXiv
Year: 2020
Subjects: subject: Software Engineering (cs.SE)
subject: Cryptography and Security (cs.CR)
subject: Networking and Internet Architecture (cs.NI)
subject: Systems and Control (eess.SY)
subject: FOS: Computer and information sciences
subject: FOS: Electrical engineering, electronic engineering, information engineering

description: The rising use of information and communication technology in smart grids likewise increases the risk of failures that endanger the security of power supply, e.g., due to errors in the communication configuration, faulty control algorithms, or cyber-attacks. Co-simulations can be used to investigate such effects, but require precise modeling of the energy, communication, and information domain within an integrated smart grid infrastructure model. Given the complexity and lack of detailed publicly available communication network models for smart grid scenarios, there is a need for an automated and systematic approach to creating such coupled models. In this paper, we present an approach to automatically generate smart grid infrastructure models based on an arbitrary electrical distribution grid model using a generic architectural template. We demonstrate the applicability and unique features of our approach alongside examples concerning network planning, co-simulation setup, and specification of domain-specific intrusion detection systems.
description: 6 pages, 5 figures, to be published in Proceedings of the 3rd International Conference on Smart Energy Systems and Technologies (SEST)
Accretion disc dynamics in extreme mass ratio compact binaries
Creators: name: Truss, Michael
Publisher: name: arXiv
Year: 2007
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: An analysis is presented of a numerical investigation of the dynamics and geometry of accretion discs in binary systems with mass ratios q < 0.1, applicable to ultra-compact X-ray binaries, AM CVn stars and very short period cataclysmic variables. The steady-state geometry of the disc in the binary reference frame is found to be quite different from that expected at higher mass ratios. For q ~ 0.1, the disc takes on the usual elliptical shape, with the major axis aligned perpendicular to the line of centres of the two stars. However, at smaller mass ratios the elliptical gaseous orbits in the outer regions of the disc are rotated in the binary plane. The angle of rotation increases with gas temperature, but is found to vary inversely with q. At q = 0.01, the major axis of these orbits is aligned almost parallel to the line of centres of the two stars. These effects may be responsible for the similar disc structure inferred from Doppler tomography of the AM CVn star GP Com (Morales-Rueda et al. 2003), which has q = 0.02. The steady-state geometry at low mass ratios is not predicted by an inviscid, restricted three-body model of gaseous orbits; it is related to the effects of tidal-viscous truncation of the disc near the Roche lobe boundary. Since the disc geometry can be inferred observationally for some systems, it is proposed that this may offer a useful diagnostic for the determination of mass ratios in ultra-compact binaries.
description: 17 pages, 9 figures, 7 in colour. Accepted for publication in MNRAS. Plain article formatting to get round arXiv problems with mn2e.sty
Πέτρα σκανδάλου: η ιστορία του σχίσματος και οι διαφορές με τη Ρώμη κατά τον Ηλία Μηνιάτη
Creators: name: Καραμπέρης, Δημήτριος Ανδρέα
Publisher: name: Aristotle University of Thessaloniki
Year: 2014
Subjects: Σχίσμα
Δογματικές διαφορές
Ηλίας Μηνιάτης
Schism
Dogmatic discrepancies
Elias Miniatis

description: Σκοπός της μεταπτυχιακής διπλωματικής αυτής εργασίας ήταν η μελέτη και ο εντοπισμός των αιτίων του σχίσματος μεταξύ της Ανατολικής και της Δυτικής εκκλησίας καθώς και των δογματικών τους διαφορών, με βάση το έργο «Πέτρα Σκανδάλου» του Ηλία Μηνιάτη μεγάλου εκκλησιαστικού ρήτορα και δασκάλου του γένους. Ασχοληθήκαμε αρχικά με το βίο, το έργο και την προσωπικότητα του μεγάλου αυτού ανδρός, του πρώτου χρονολογικά από τους δασκάλους του γένους, οι οποίοι εμφανίζονται αυτή την περίοδο για να φωτίσουν, να διδάξουν και να στηρίξουν το σκλαβωμένο ελληνικό γένος. Στη συνέχεια επιχειρήθηκε η αναλυτική παρουσίαση των γεγονότων του σχίσματος και η τεκμηρίωση των ορθοδόξων θέσεων έναντι των παπικών καινοτομιών. Παραθέσαμε επιπλέον τις σημαντικότερες διαφορές μεταξύ των δύο εκκλησιών στους καιρούς του Ηλία Μηνιάτη, έτσι όπως τις παρουσιάζει ο ίδιος. Καταλήξαμε τέλος στη διαπίστωση ότι οι αρχικές αυτές διαφορές εξακολουθούν να υφίστανται και το σχίσμα βαθαίνει ολοένα και περισσότερο, παρόλο που κατά καιρούς επιχειρούνται σημαντικές προσπάθειες για την άρση του.
description: The aim of this master thesis was to study and pinpoint the causes of the schism between the Eastern and Western Church along with their dogmatic discrepancies, based on the work «Stone of Scandal» by Elias Miniatis, an important orator of church and teacher of Greek nation. We initially focused on the life, work and personality of this important man, the first, chronologically, of the teachers of the nation who appear around this time to enlighten, teach and support the enslaved Greek people. Following this, we attempted an analytical presentation of the events of the schism and an establishment of the orthodox theses versus the papal novelties. Furthermore, we stated the most essential differences between the two churches at the time of Elias Miniatis, as theses are presented by the man himself. We came to the conclusion that these original differences are still in existence and the schism is deepening despite significant attempts to be lifted.
Model order reduction of flow based on a modular geometrical approximation of blood vessels
Creators: name: Pegolotti, Luca
name: Pfaller, Martin
name: Marsden, Alison
name: Deparis, Simone
Publisher: name: arXiv
Year: 2020
Subjects: subject: Numerical Analysis (math.NA)
subject: FOS: Mathematics

description: We are interested in a reduced order method for the efficient simulation of blood flow in arteries. The blood dynamics is modeled by means of the incompressible Navier-Stokes equations. Our algorithm is based on an approximated domain-decomposition of the target geometry into a number of subdomains obtained from the parametrized deformation of geometrical building blocks (e.g. straight tubes and model bifurcations). On each of these building blocks, we build a set of spectral functions by proper orthogonal decomposition of a large number of snapshots of finite element solutions (offline phase). The global solution of the Navier-Stokes equations on a target geometry is then found by coupling linear combinations of these local basis functions by means of spectral Lagrange multipliers (online phase). Being that the number of reduced degrees of freedom is considerably smaller than their finite element counterpart, this approach allows us to significantly decrease the size of the linear system to be solved in each iteration of the Newton-Raphson algorithm. We achieve large speedups with respect to the full order simulation (in our numerical experiments, the gain is at least of one order of magnitude and grows inversely with respect to the reduced basis size), whilst still retaining satisfactory accuracy for most cardiovascular simulations.
Biosensors
Creators: name: Garg, Rishabh
Publisher: name: Zenodo
Year: 2021

description: A biosensor is a device that measures biological or chemical reactions by converting them into electrical signals. Biosensors are made up of a biological component, such as an enzyme, antibody, or cell, and a transducer that converts the biological response into an electrical signal. The signal can be electrical, optical, or thermal.
Spitzer Quasar and ULIRG evolution study (QUEST): I. The origin of the far infrared continuum of QSOs
Creators: name: Schweitzer, M.
name: Lutz, D.
name: Sturm, E.
name: Contursi, A.
name: Tacconi, L. J.
name: Lehnert, M. D.
name: Dasyra, K.
name: Genzel, R.
name: Veilleux, S.
name: Rupke, D.
name: Kim, D. -C.
name: Baker, A. J.
name: Netzer, H.
name: Sternberg, A.
name: Mazzarella, J.
name: Lord, S.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: This paper addresses the origin of the far-infrared (FIR) continuum of QSOs, based on the Quasar and ULIRG Evolution Study (QUEST) of nearby QSOs and ULIRGs using observations with the Spitzer Space Telescope. For 27 Palomar-Green QSOs at z
description: 39 pages, 8 figures, accepted for publication in ApJ