cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Ανάπτυξη και επικύρωση μεθόδου για τον προσδιορισμό πολυφαινολών και αλκαλοειδών πουρινών σε ορό αίματος με την τεχνική της υγρής χρωματογραφίας υψηλής πίεσης (HPLC)
Creators: name: Ναζυροπούλου, Χρυσούλα Δημητρίου
Publisher: name: Aristotle University of Thessaloniki
Year: 2014
Subjects: Πολυφαινόλες
Αλκαλοειδή πουρίνης
Υγρή Χρωματογραφία Υψηλής Πίεσης (HPLC)
Polyphenols
Purine alkaloids
High Pressure Liquid Chromatography (HPLC)

description: Στην παρούσα μεταπτυχιακή εργασία, αναπτύχθηκε μια μέθοδος διαχωρισμού και ποσοτικού προσδιορισμού πέντε πολυφαινολών του τσαγιού: τριών φλαβαν-3-ολών [(+)-κατεχίνη (C), (-)-επικατεχίνη (EC), (-)-γαλλικός εστέρας επιγαλλοκατεχίνης (EGCG)], δύο φαινολικών οξέων: ενός υδροξυβενζοϊκού οξέος [γαλλικό οξύ (GA)] και ενός υδροξυκινναμωμικού οξέος [χλωρογενικό οξύ (ClGn)] και τριών αλκαλοειδών πουρινών [καφεΐνη (CAF), θεοβρωμίνη (TB) και θεοφυλλίνη (TF)] σε ορό αίματος ανθρώπινης προέλευσης. Η τεχνική που χρησιμοποιήθηκε είναι η υγρή χρωματογραφία υψηλής πίεσης με ανιχνευτή παράταξης φωτοδιόδων (HPLC-DAD). Το μήκος κύματος επιλέχθηκε με βάση τη μέγιστη απορρόφηση των προσδιοριζόμενων ενώσεων, η οποία ήταν στα 330 nm για το ClGn και στα 270 nm για τις υπόλοιπες ενώσεις. Το εσωτερικό πρότυπο που επιλέχθηκε ήταν το πρωτοκατεχικό οξύ [3,4-διυδροξυβενζοϊκό οξύ, (PCA)]. Αρχικά μελετήθηκαν πρότυπα διαλύματα των ενώσεων, ενώ στη συνέχεια η μέθοδος εφαρμόστηκε σε ορό αίματος, ύστερα από κατάλληλη προκατεργασία. Η μέθοδος αυτή επικυρώθηκε ως προς την εκλεκτικότητα, τη γραμμικότητα, την ευαισθησία, την επαναληψιμότητα, την πιστότητα και τη σταθερότητα. Ο κύριος στόχος της εργασίας ήταν η εύρεση μιας απλής, γρήγορης, επαναλήψιμης και οικονομικής μεθόδου για το διαχωρισμό και τον ποσοτικό προσδιορισμό των συγκεκριμένων αντιοξειδωτικών σε ορό αίματος.
description: In this thesis, we have developed a simple methodology for the simultaneous determination and quantification of five tea polyphenols: three flavan-3-ols [(+)-catechin (C), (-)-epicatechin (EC), (-)-epigallocatechin gallate (EGCG)], one phenolic acid [(gallic acid (GA)], one hydroxycinnamic acid [chlorogenic acid (ClGn)] and three purine alkaloids [caffeine (CAF), theobromine (TB), and theophylline (TF)] in blood serum. The technique used is high pressure liquid chromatography with photodiode array detector (HPLC-DAD). Monitoring of the analytes was performed at the wavelength of maximum absorbance which was 330 nm for ClGn and 270 nm for the rest of the analytes. A phenolic acid [protocatechuic acid (PCA)] was chosen as the internal standard. At first, standard solutions of the compounds were examined, and then the method was applied to blood serum, after suitable sample preparation. The developed method was validated in terms of sensitivity, linearity, accuracy, precision, stability and selectivity. The aim of this work was to find a rapid, simple, efficient, reproducible and economical method for the simultaneous determination of these polyphenols and purine alkaloids in blood serum.
Η Βασιλεία Του Θεού Ή Των Ουρανών Στα Συνοπτικά Ευαγγέλια-Ερμηνευτική και Θεολογική Προσέγγιση
Creators: name: Πετράς, Διονύσιος Παναγιώτης Πέτρου
Publisher: name: Aristotle University of Thessaloniki
Year: 2015
Subjects: Βασιλεία του Θεού
Βασιλεία των Ουρανών
Χριστός
Κingdom of God
Kingdom of Heaven
Christ

description: Ο όρος Βασιλεία των Ουρανών - η Βασιλεία του Θεού αποτελεί ένα πάζλ για τους ερευνητές της Καινής Διαθήκης. Άλλοτε o όρος αυτός συνδέεται με το παρόν, άλλοτε με το μέλλον και άλλοτε έχουμε συνδυασμό παρόντος και μέλλοντος. Πρωταρχικοί, λοιπόν, στόχοι της συγκεκριμένης εργασίας είναι α) η αποσαφήνιση αυτής της σύνδεσης, β) τι σημαίνει ο όρος βασιλεία του Θεού-Ουρανών; και γ) Πώς λειτουργεί ο όρος Βασιλεία του Θεού-Ουρανών στην Π.Δ και στην Κ.Δ; Αυτό θα επιτευχθεί αρχικά με τη διασαφήνιση του πώς βλέπει η συνοπτική παράδοση τον όρο Βασιλεία του Θεού - η Βασιλεία των Ουρανών. Στη συνέχεια θα παρατηρήσουμε τον όρο Βασιλεία του Θεού-Ουρανών ερμηνευτικά παραθέτοντας το πρωτότυπο κείμενο ,την Ανάλυση και την Εξήγηση και με τη βοήθεια της ιστορίας της πρόσληψης θα δούμε πώς οι Πατέρες και εκκλησιαστικοί συγγραφείς της χριστιανοσύνης προσλαμβάνουν τον όρο Βασιλεία του Θεού-Ουρανών και θα καταλήξουμε με τα τελικά συμπεράσματα.
description: The term Kingdom of Heaven-kingdom of God is a puzzle for the researchers of the New Testament. In the past this term sometimes is associated with the present, sometimes with the past and sometimes we have a combination of present and past. The most important aims of this specific paper are: a) the clarification of this association b) the meaning of the term ‘Kingdom of God-Kingdom of Heaven c) how the term kingdom of God-kingdom of Heaven functions in the Old Testament and in the New Testament? This will be achieved initially with the clarification of how tradition regards the term Kingdom of God-Kingdom of Heaven. Furthermore, we will make interpret the term Kingdom of God -Kingdom of Heaven quoting the original text, the analysis and the explanation and with the help of the history of ‘reception’, we will see how the Fathers and the ‘church’ authors of Christianity regard the term Kingdom of God-Kingdom of Heaven and we will end up with the final conclusions.
Domain-wall excitons and optical conductivity in one-dimensional Wigner lattices
Creators: name: Mayr, Matthias
name: Horsch, Peter
Publisher: name: arXiv
Year: 2006
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: Motivated by the recent finding that doped edge-sharing Cu-O chain compounds like Na$_3$Cu$_2$O$_4$ and Na$_8$Cu$_5$O$_{10}$ are realizations of one-dimensional Wigner crystals, we study the optical spectra of such systems. Charge excitations in 1D Wigner crystals are described in terms of domain wall excitations with fractional charge. We investigate analytically and numerically the domain-wall excitations that dominate the optical absorption, and analyse the dispersion and the parameter range of exciton states characteristic for the long-ranged Coulomb attraction between domain walls. Here we focus on the Wigner lattice at quarter-filling relevant for Na$_3$Cu$_2$O$_4$ and analyze in particular the role of second neighbor hopping $t_2$ which is important in edge-sharing chain compounds. Large $t_2$ drives an instability of the Wigner lattice via a soft domain-wall exciton towards a charge-density wave with a modulation period distinct from that of the Wigner lattice. Furthermore we calculate the temperature dependence of the DC-conductivity and show that it can be described by activated behavior combined with a $T^{-α}$ dependent mobility.
description: 16 pages, 19 figures
Modular classes of regular twisted Poisson structures on Lie algebroids
Creators: name: Kosmann-Schwarzbach, Yvette
name: Yakimov, Milen
Publisher: name: arXiv
Year: 2007
Subjects: subject: Symplectic Geometry (math.SG)
subject: Mathematical Physics (math-ph)
subject: FOS: Mathematics
subject: FOS: Physical sciences
subject: 53D17, 58H05, 17B62

description: We derive a formula for the the modular class of a Lie algebroid with a regular twisted Poisson structure in terms of a canonical Lie algebroid representation of the image of the Poisson map. We use this formula to compute the modular classes of Lie algebras with a twisted triangular r-matrix. The special case of r-matrices associated to Frobenius Lie algebras is also studied.
description: 13 pages, v.2 and 3: minor changes and two references added
Length scale dependent elasticity in DNA from coarse-grained and all-atom models
Creators: name: Skoruppa, Enrico
name: Voorspoels, Aderik
name: Vreede, Jocelyne
name: Carlon, Enrico
Publisher: name: arXiv
Year: 2020
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: Biomolecules (q-bio.BM)
subject: FOS: Physical sciences
subject: FOS: Biological sciences

description: The mechanical properties of DNA are typically described by elastic theories with purely local couplings (on-site models). We discuss and analyze coarse-grained (oxDNA) and all-atom simulations, which indicate that in DNA distal sites are coupled. Hence, off-site models provide a more realistic description of the mechanics of the double helix. We show that off-site interactions are responsible for a length scale dependence of the elasticity, and we develop an analytical framework to estimate bending and torsional persistence lengths in models including these interactions. Our simulations indicate that off-site couplings are particularly strong for certain degrees of freedom, while they are very weak for others. If stiffness parameters obtained from DNA data are used, the theory predicts large length scale dependent effects for torsional fluctuations and a modest effect in bending fluctuations, which is in agreement with experiments.
description: 16 pages, 9 figures; video abstract at https://youtu.be/8FUdFw8IbuY
Convectively Driven Three Dimensional Turbulence in Massive Star Envelopes: I. A 1D Implementation of Diffusive Radiative Transport
Creators: name: Schultz, William
name: Bildsten, Lars
name: Jiang, Yan-Fei
Publisher: name: arXiv
Year: 2020
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: Massive ($M >30\,$M$_{\odot}$) stars exhibit luminosities that are near the Eddington-limit for electron scattering causing the increase in opacity associated with iron at $T\approx180,000\,$K to trigger supersonic convection in their outer envelopes. Three dimensional radiative hydrodynamics simulations by Jiang and collaborators with the Athena++ computational tool have found order of magnitude density and radiative flux fluctuations in these convective regions, even at optical depths $\gg100$. We show here that radiation can diffuse out of a parcel during the timescale of convection in these optically thick parts of the star, motivating our use of a "pseudo" Mach number to characterize both the fluctuation amplitudes and their correlations. In this first paper, we derive the impact of these fluctuations on the radiative pressure gradient needed to carry a given radiative luminosity. This implementation leads to a remarkable improvement between 1D and 3D radiative pressure gradients, and builds confidence in our path to an eventual 1D implementation of these intrinsically 3D envelopes. However, simply reducing the radiation pressure gradient is not enough to implement a new 1D model. Rather, we must also account for the impact of two other aspects of turbulent convection: the substantial pressure, and the ability to transport an appreciable fraction of the luminosity, which will be addressed in upcoming works. This turbulent convection also arises in other instances where the stellar luminosity approaches the Eddington luminosity. Hence, our effort should apply to other astrophysical situations where an opacity peak arises in a near Eddington limited, radiation pressure dominated plasma.
description: 15 pages, 10 figures, 1 table. Accepted for publication in ApJ
Fixed points in frustrated magnets revisited
Creators: name: Delamotte, B.
name: Holovatch, Yu.
name: Ivaneyko, D.
name: Mouhanna, D.
name: Tissier, M.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Other Condensed Matter (cond-mat.other)
subject: FOS: Physical sciences

description: We analyze the validity of perturbative renormalization group estimates obtained within the fixed dimension approach of frustrated magnets. We reconsider the resummed five-loop beta-functions obtained within the minimal subtraction scheme without epsilon-expansion for both frustrated magnets and the well-controlled ferromagnetic systems with a cubic anisotropy. Analyzing the convergence properties of the critical exponents in these two cases we find that the fixed point supposed to control the second order phase transition of frustrated magnets is very likely an unphysical one. This is supported by its non-Gaussian character at the upper critical dimension d=4. Our work confirms the weak first order nature of the phase transition occuring at three dimensions and provides elements towards a unified picture of all existing theoretical approaches to frustrated magnets.
description: 18 pages, 8 figures. This article is an extended version of arXiv:cond-mat/0609285
XMM-Newton observations reveal the X-ray counterpart of the very-high-energy gamma-ray source HESSJ1640-465
Creators: name: Funk, S.
name: Hinton, J. A.
name: Puehlhofer, G.
name: Aharonian, F. A.
name: Hofmann, W.
name: Reimer, O.
name: Wagner, S.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We present X-ray observations of the as of yet unidentified very high-energy (VHE) gamma-ray source HESSJ1640-465 with the aim of establishing a counterpart of this source in the keV energy range, and identifying the mechanism responsible for the VHE emission. The 21.8 ksec XMM-Newton observation of HESSJ1640-465 in September 2005 represents a significant improvement in sensitivity and angular resolution over previous ASCA studies in this region. These new data show a hard-spectrum X-ray emitting object at the centroid of the H.E.S.S. source, within the shell of the radio Supernova Remnant (SNR) G338.3-0.0. This object is consistent with the position and flux previously measured by both ASCA and Swift-XRT but is now shown to be significantly extended. We argue that this object is very likely the counterpart to HESSJ1640-465 and that both objects may represent the Pulsar Wind Nebula of an as of yet undiscovered pulsar associated with G338.3-0.0.
description: submitted to the Astrophysical Journal
QPOs in compact binaries from small scale eruptions in an inner magnetized disk
Creators: name: Scepi, Nicolas
name: Begelman, Mitchell C.
name: Dexter, Jason
Publisher: name: arXiv
Year: 2020
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: Dwarf novæ (DNe) and low mass X-ray binaries (LMXBs) are compact binaries showing variability on time scales from years to less than seconds. Here, we focus on explaining part of the rapid fluctuations in DNe, following the framework of recent studies on the monthly eruptions of DNe that use a hybrid disk composed of an outer standard disk and an inner magnetized disk. We show that the ionization instability, that is responsible for the monthly eruptions of DNe, is also able to operate in the inner magnetized disk. Given the low density and the fast accretion time scale of the inner magnetized disk, the ionization instability generates small, rapid heating and cooling fronts propagating back and forth in the inner disk. This leads to quasi-periodic oscillations (QPOs) with a period of the order of $1000$ s. A strong prediction of our model is that these QPOs can only develop in quiescence or at the beginning/end of an outburst. We propose that these rapid fluctuations might explain a subclass of already observed QPOs in DNe as well as a, still to observe, subclass of QPOs in LMXBs. We also extrapolate to the possibility that the radiation pressure instability might be related to Type B QPOs in LMXBs.
description: Accepted for publication in MNRAS. 12 pages, 6 figures, 2 Tables
การทำนาเกลือกับพัฒนาการสังคมและเศรษฐกิจของหมู่บ้านสงขลา จังหวัดสมุทรปราการ ระหว่าง พ.ศ. 2450-2549
Creators: name: ปัณฉัตร สินธุสะอาด
Publisher: name: วารสารวิจัย มสด สาขามนุษยศาสตร์และสังคมศาสตร์
Year: 2549
Subjects: นาเกลือ, จังหวัดสมุทรปราการ,การเปลี่ยนแปลงทางเศรษฐกิจและสังคม

description: 1, 2, วารสารวิจัย มสด สาขามนุษยศาสตร์และสังคมศาสตร์
Tunneling Enhancement of the Gas-Phase CH + CO2 Reaction at Low Temperature
Creators: name: Nunez-Reyes, Dianailys
name: Hickson, Kevin M.
name: Loison, Jean-Christophe
name: Spada, Rene F. K.
name: Vichietti, Rafael M.
name: Machado, Francisco B. C.
name: Haiduke, Roberto L. A.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: Chemical Physics (physics.chem-ph)
subject: FOS: Physical sciences

description: The rates of numerous activated reactions between neutral species increase at low temperatures through quantum mechanical tunneling of light hydrogen atoms. Although tunneling processes involving molecules or heavy atoms are well known in the condensed phase, analogous gas-phase processes have never been demonstrated experimentally. Here, we studied the activated CH + CO2 -> HCO + CO reaction in a supersonic flow reactor, measuring rate constants that increase rapidly below 100 K. Mechanistically, tunneling is shown to occur by CH insertion into the C-O bond, with rate calculations accurately reproducing the experimental values. To exclude the possibility of H-atom tunneling, CD was used in additional experiments and calculations. Surprisingly, the equivalent CD + CO2 reaction accelerates at low temperature as zero point energy effects remove the barrier to product formation. In conclusion, heavy-particle tunneling effects might be responsible for the observed reactivity increase at lower temperatures for the CH + CO2 reaction, while the equivalent effect for the CD + CO2 reaction results instead from a submerged barrier with respect to reactants.
description: Accepted for publication in the Journal of Physical Chemistry A. 30 pages including supplementary materials
Stationary axisymmetric exteriors for perturbations of isolated bodies in general relativity, to second order
Creators: name: MacCallum, Malcolm A. H.
name: Mars, Marc
name: Vera, Raül
Publisher: name: arXiv
Year: 2006
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: Perturbed stationary axisymmetric isolated bodies, e.g. stars, represented by a matter-filled interior and an asymptotically flat vacuum exterior joined at a surface where the Darmois matching conditions are satisfied, are considered. The initial state is assumed to be static. The perturbations of the matching conditions are derived and used as boundary conditions for the perturbed Ernst equations in the exterior region. The perturbations are calculated to second order. The boundary conditions are overdetermined: necessary and sufficient conditions for their compatibility are derived. The special case of perturbations of spherical bodies is given in detail.
description: RevTeX; 32 pp. Accepted by Phys. Rev. D. Added references and extra comments in introduction
Review of Life Cycle Sustainability Assessment and Potential for Its Adoption at an Automotive Company
Creators: name: Tarne, Peter
name: Traverso, Marzia
name: Finkbeiner, Matthias
Publisher: name: Technische Universität Berlin
Year: 2017
Subjects: subject: 600 Technik, Technologie
subject: LCSA
subject: structured literature review
subject: product sustainability assessment

description: The aim of this paper is to guide the next steps of a PhD thesis through a structured review of the state of the art and implementation of Life Cycle Sustainability Assessment (LCSA), and to identify challenges and potentials for its adoption at an automotive company. First, the structured literature review was conducted on LCSA to screen the current methodological and practical implementations and to identify the main research needs in the field. Second, a research on the current status of LCSA within the automotive industry was carried out by means of investigation of published sources of 15 Original Equipment Manufacturers (OEM). By combining the results of both steps and consulting with decision makers, the challenges and potential for adopting LCSA at an automotive company were identified. The main challenges for adoption of LCSA were found to be: (1) the consistent execution of the three life cycle based assessment methods; (2) the comparatively low maturity of Social Life Cycle Assessment (S-LCA); and (3) the adequate presentation and interpretation of results. Next steps towards implementation would be a case study to gather experience on the combined execution of the three life cycle based assessments at an automotive company. Furthermore, it should be determined what the needs of decision makers at an automotive company are regarding the aggregation and interpretation of environmental, social, and economic impacts.
Weighted Network of Chinese Nature Science Basic Research
Creators: name: Liu, Jian-Guo
name: Xuan, Zhao-Guo
name: Dang, Yan-Zhong
name: Guo, Qiang
name: Wang, Zhong-Tuo
Publisher: name: arXiv
Year: 2006
Subjects: subject: Physics and Society (physics.soc-ph)
subject: FOS: Physical sciences

description: Using the requisition papers of Chinese Nature Science Basic Research in management and information department, we construct the weighted network of research areas({\bf WRAN}) represented by the subject codes. In WRAN, two research areas are considered connected if they have been filled in at least one requisition paper. The edge weight is defined as the number of requisition papers which have filled in the same pairs of codes. The node strength is defined as the number of requisition papers which have filled in this code, including the papers which have filled in it only. Here we study a variety of nonlocal statistics for these networks, such as typical distances between research areas through the network, and measures of centrality such as betweenness. These statistics characteristics can illuminate the global development trend of Chinese scientific study, it is also helpful to adjust the code system to reflect the real status more accurately. Finally, we present a plausible model for the formation and structure of networks with the observed properties.
description: 8 pages, 14 figures
Η Οικιακή Εργασία είναι Πραγματική Εργασία: Η εκ νέου πολιτικοποίηση του θέματος του Φύλου, της Ιδιότητας του Πολίτη και των Παγκόσμιων Αδικιών
Creators: name: Κουλιούφα, Βερονίκη Δημητρίου
Publisher: name: Aristotle University of Thessaloniki
Year: 2015
Subjects: Σχολιασμένη μετάφραση
Οικιακή εργασία
Κοινωνική αδικία
Commented Translation
Domestic work
Social injustice

description: Η συγκεκριμένη εργασία αποτελεί δείγμα σχολιασμένης μετάφρασης προκειμένου μέσα από τη διαδικασία μετάφρασης να δημιουργηθεί ένα γλωσσάρι όρων στην αγγλική και ελληνική γλώσσα καθώς και να σχολιαστούν οι τυχόν μεταφραστικές δυσκολίες που συναντήθηκαν αλλά και η αντιμετώπιση αυτών. Έτσι λοιπόν μετά από την μετάφραση του αποσπάσματος που προέρχεται από μια εργασία της Midori Kaga, με τον τίτλο ‘Domestic Work is Real Work’ Repoliticizing the Discourse on Gender, Citizenship, and Global Injustices - «Η Οικιακή Εργασία είναι Πραγματική Εργασία» Η εκ νέου πολιτικοποίηση του θέματος του Φύλου, της Ιδιότητας του Πολίτη και των Παγκόσμιων Αδικιών, από την αγγλική στην ελληνική γλώσσα, ακολουθεί ένα γλωσσάρι όρων με τους όρους στα αγγλικά αλλά και η μετάφρασή τους. Στη συνέχεια ακολουθεί η τεκμηρίωση των όρων μετά από αναζήτηση στο διαδίκτυο σε αγγλικές αλλά και ελληνικές ιστοσελίδες. Στο τέλος της εργασίας αναφερόμαστε στην αντιμετώπιση των μεταφραστικών δυσκολιών που συναντήσαμε κατά τη διαδικασία της μετάφρασης του κειμένου αλλά και τις επιλογές που κάναμε προκειμένου να ξεπεράσουμε τις δυσκολίες αυτές και να καταλήξουμε σε συγκεκριμένες επιλογές.
description: This essay is a sample of commented translation. Through the process of translation we were able to create a glossary of terms in english and greek language and also to comment the possible translating difficulties that we met and also how we dealt with them. After the translation of the essay of Midori Kaga with the title‘Domestic Work is Real Work’ Repoliticizing the Discourse on Gender, Citizenship, and Global Injustices, from English into Greek, we have created a glossary of English terms and their translation. In addition there is the validation of the terms according to internet links from English and Greek sites. In the end of the essay we analyze the translating difficulties that we ran into and also the ways that we managed to come through them and make certain choices.
Μαθητές με αναπηρία και μαθητές γλωσσικών/πολιτισμικών μειονοτήτων με αναπηρία: αναπαραστάσεις και απόψεις των νηπιαγωγών γενικής και ειδικής εκπαίδευσης
Creators: name: Ευγενιάδου, Ελισάβετ Αναστασίου
Publisher: name: Aristotle University of Thessaloniki
Year: 2015
Subjects: κοινωνικές αναπαραστάσεις
αναπηρία
γλωσσικές/πολιτισμικές μειονότητες
social representations
disability
linguistic/ethnic minorities

description: Η παρούσα εργασία αφορά τους μαθητές με αναπηρία και τους μαθητές γλωσσικών/ πολιτισμικών μειονοτήτων με αναπηρία («διπλή αναπηρία») που φοιτούν στο γενικό νηπιαγωγείο και συγκεκριμένα την διερεύνηση των αναπαραστάσεων και απόψεων των νηπιαγωγών γενικής και ειδικής εκπαίδευσης για τους μαθητές αυτούς και την εκπαίδευσή τους. Για τον σκοπό αυτό, εστάλη ηλεκτρονικό ερωτηματολόγιο σε νηπιαγωγούς γενικής και ειδικής εκπαίδευσης που υπηρετούν σε γενικά νηπιαγωγεία με τμήμα ένταξης. Οι απαντήσεις των νηπιαγωγών φανερώνουν τις αναπραστάσεις και απόψεις τους για τους μαθητές με αναπηρία και τους μαθητές γλωσσικών/ πολιτισμικών μειονοτήτων με αναπηρία, την εκπαίδευση και ένταξή τους στο γενικό νηπιαγωγείο, καθώς και την εκπαιδευτική αντιμετώπιση των μαθητών αυτών. Τα αποτελέσματα της έρευνας προσφέρουν χρήσιμα συμπεράσματα και μπορούν να αξιοποιηθούν από τους φορείς και από τους υπευθύνους Ειδικής και Διαπολιτισμικής Εκπαίδευσης.
description: This paper discusses the representations and opinions adopted by general kindergarden teachers and special educators regarding students with disabilities and students from linguistic/ethnic minorities with disabilities (“dual disabilities”). For this purpose, an online questionnaire was given to teachers serving in generally nursery schools, with integration class. The teachers' answers revealed their representations towards students with disabilities and students from linguistic/ethnic minorities, students education and integration in general schools and the educational practices they use. The research results provide useful inferences and can be used by those responsible for Special Education and Intercultural Education.
Quantum stabilizer codes, lattices, and CFTs
Creators: name: Dymarsky, Anatoly
name: Shapere, Alfred
Publisher: name: arXiv
Year: 2020
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: Information Theory (cs.IT)
subject: Combinatorics (math.CO)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences
subject: FOS: Computer and information sciences
subject: FOS: Mathematics

description: There is a rich connection between classical error-correcting codes, Euclidean lattices, and chiral conformal field theories. Here we show that quantum error-correcting codes, those of the stabilizer type, are related to Lorentzian lattices and non-chiral CFTs. More specifically, real self-dual stabilizer codes can be associated with even self-dual Lorentzian lattices, and thus define Narain CFTs. We dub the resulting theories code CFTs and study their properties. T-duality transformations of a code CFT, at the level of the underlying code, reduce to code equivalences. By means of such equivalences, any stabilizer code can be reduced to a graph code. We can therefore represent code CFTs by graphs. We study code CFTs with small central charge $c=n\leq 12$, and find many interesting examples. Among them is a non-chiral $E_8$ theory, which is based on the root lattice of $E_8$ understood as an even self-dual Lorentzian lattice. By analyzing all graphs with $n\leq 8$ nodes we find many pairs and triples of physically distinct isospectral theories. We also construct numerous modular invariant functions satisfying all the basic properties expected of the CFT partition function, yet which are not partition functions of any known CFTs. We consider the ensemble average over all code theories, calculate the corresponding partition function, and discuss its possible holographic interpretation. The paper is written in a self-contained manner, and includes an extensive pedagogical introduction and many explicit examples.
description: 99 pages
Phenomenology of vector-like leptons with Deep Learning at the Large Hadron Collider
Creators: name: Freitas, Felipe F.
name: Gonçalves, João
name: Morais, António P.
name: Pasechnik, Roman
Publisher: name: arXiv
Year: 2020
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: In this paper, a model inspired by Grand Unification principles featuring three generations of vector-like fermions, new Higgs doublets and a rich neutrino sector at the low scale is presented. Using the state-of-the-art Deep Learning techniques we perform the first phenomenological analysis of this model focusing on the study of new charged vector-like leptons (VLLs) and their possible signatures at CERN's Large Hadron Collider (LHC). In our numerical analysis we consider signal events for vector-boson fusion and VLL pair production topologies, both involving a final state containing a pair of charged leptons of different flavor and two sterile neutrinos that provide a missing energy. We also consider the case of VLL single production where, in addition to a pair of sterile neutrinos, the final state contains only one charged lepton. All calculated observables are provided as data sets for Deep Learning analysis, where a neural network is constructed, based on results obtained via an evolutive algorithm, whose objective is to maximise either the accuracy metric or the Asimov significance for different masses of the VLL. Taking into account the effect of the three analysed topologies, we have found that the combined significance for the observation of new VLLs at the high-luminosity LHC can range from $5.7σ$, for a mass of $1.25~\mathrm{TeV}$, all the way up to $28σ$ if the VLL mass is $200~\mathrm{GeV}$. We have also shown that by the end of the LHC Run-III a $200~\mathrm{GeV}$ VLL can be excluded with a confidence of $8.8$ standard deviations. The results obtained show that our model can be probed well before the end of the LHC operations and, in particular, providing important phenomenological information to constrain the energy scale at which new gauge symmetries emergent from the considered Grand Unification picture can be manifest.
description: 60 pages, 31 figures, 15 tables
Undercomplete Blind Subspace Deconvolution
Creators: name: Szabo, Zoltan
name: Poczos, Barnabas
name: Lorincz, Andras
Publisher: name: arXiv
Year: 2007
Subjects: subject: Statistics Theory (math.ST)
subject: Machine Learning (stat.ML)
subject: FOS: Mathematics
subject: FOS: Computer and information sciences

description: We introduce the blind subspace deconvolution (BSSD) problem, which is the extension of both the blind source deconvolution (BSD) and the independent subspace analysis (ISA) tasks. We examine the case of the undercomplete BSSD (uBSSD). Applying temporal concatenation we reduce this problem to ISA. The associated `high dimensional' ISA problem can be handled by a recent technique called joint f-decorrelation (JFD). Similar decorrelation methods have been used previously for kernel independent component analysis (kernel-ICA). More precisely, the kernel canonical correlation (KCCA) technique is a member of this family, and, as is shown in this paper, the kernel generalized variance (KGV) method can also be seen as a decorrelation method in the feature space. These kernel based algorithms will be adapted to the ISA task. In the numerical examples, we (i) examine how efficiently the emerging higher dimensional ISA tasks can be tackled, and (ii) explore the working and advantages of the derived kernel-ISA methods.
description: Final version, appeared in Journal of Machine Learning Research
Spin wave propagation in corrugated waveguides
Creators: name: Turčan, Igor
name: Flajšman, Lukáš
name: Wojewoda, Ondřej
name: Roučka, Václav
name: Man, Ondřej
name: Urbánek, Michal
Publisher: name: arXiv
Year: 2020
Subjects: subject: Applied Physics (physics.app-ph)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Curvature-induced effects allow us to tailor the static and dynamic response of a magnetic system with a high degree of freedom. We study corrugated magnonic waveguides deposited on a sinusoidally modulated substrate prepared by focused electron beam deposition. The surface curvature in films with thicknesses comparable to the amplitude of modulation locally modifies the contributions of dipolar and exchange energies and results in an effective anisotropy term which can be tuned on-demand based on the exact geometry. We show, by Brillouin light scattering microscopy, that without the presence of an external magnetic field, spin waves propagate over a distance 10$\times$larger in the corrugated waveguide than in the planar waveguide. Further, we analyze the influence of the modulation amplitude on spin-wave propagation and conclude that for moderate modulation amplitudes, the spin-wave decay length is not affected. For larger amplitudes, the decay length decreases linearly with increasing modulation.
description: 5 pages, 4 figures
Itinerant ferromagnetism mediated by giant spin polarization of metallic ligand band in van der Waals magnet Fe5GeTe2
Creators: name: Yamagami, K.
name: Fujisawa, Y.
name: Driesen, B.
name: Hsu, C. H.
name: Kawaguchi, K.
name: Tanaka, H.
name: Kondo, T.
name: Zhang, Y.
name: Wadati, H.
name: Araki, K.
name: Takeda, T.
name: Takeda, Y.
name: Muro, T.
name: Chuang, F. C.
name: Niimi, Y.
name: Kuroda, K.
name: Kobayashi, M.
name: Okada, Y.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: We investigate near-Fermi-energy (EF) element-specific electronic and spin states of ferromagnetic van der Waals (vdW) metal Fe5GeTe2. The soft x-ray angle-resolved photoemission spectroscopy (SX-ARPES) measurement provides spectroscopic evidence of localized Fe 3d band. We also find prominent hybridization between the localized Fe 3d band and the delocalized Ge/Te p bands. This picture is strongly supported from direct observation of the remarkable spin polarization of the ligand p bands near EF, using x-ray magnetic circular dichroism (XMCD) measurements. The strength of XMCD signal from ligand element Te shows the highest value, as far as we recognize, among literature reporting finite XMCD signal for none-magnetic element in any systems. Combining SX-ARPES and elemental selective XMCD measurements, we collectively point an important role of giant spin polarization of the delocalized ligand Te states for realizing itinerant long-range ferromagnetism in Fe5GeTe2. Our finding provides a fundamental elemental selective view-point for understanding mechanism of itinerant ferromagnetism in low dimensional compounds, which also leads insight for designing exotic magnetic states by interfacial band engineering in heterostructures.
Optical Orientation in Ferromagnet/Semiconductor Hybrids
Creators: name: Korenev, V. L.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: The physics of optical pumping of semiconductor electrons in the ferromagnet/semiconductor hybrids is discussed. Optically oriented semiconductor electrons detect the magnetic state of the ferromagnetic film. In turn, the ferromagnetism of the hybrid can be controlled optically with the help of the semiconductor. Spin-spin interactions near the interface ferromagnet/semiconductor play crucial role in the optical readout and the manipulation of ferromagnetism.
description: The review is written for a special issue "Spin Orientation" of Semiconductor Science and Technology journal dedicated to the memory of B.P. Zakharchenya
Prisoner's Dilemma on community networks
Creators: name: Chen, Xiaojie
name: Fu, Feng
name: Wang, Long
Publisher: name: arXiv
Year: 2006
Subjects: subject: Physics and Society (physics.soc-ph)
subject: FOS: Physical sciences

description: We introduce a community network model which exhibits scale-free property and study the evolutionary Prisoner's Dilemma game (PDG) on this network model. It is found that the frequency of cooperators decreases with the increment of the average degree $\bar{k}$ from the simulation results. And reducing inter-community links can promote cooperation when we keep the total links (including inner-community and inter-community links) unchanged. It is also shown that the heterogeneity of networks does not always enhance cooperation and the pattern of links among all the vertices under a given degree-distribution plays a crucial role in the dominance of cooperation in the network model.
description: final version
Stratified Global MHD Models of Accretion Disks in Semi-Detached Binaries
Creators: name: Pjanka, Patryk
name: Stone, James M.
Publisher: name: arXiv
Year: 2020
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: We present results of the first global magnetohydrodynamic (MHD) simulations of accretion disks fed by Roche lobe overflow, including vertical stratification, in order to investigate the roles of spiral shocks, magnetorotational instability (MRI), and the accretion stream on disk structure and evolution. Our models include a simple treatment of gas thermodynamics, with orbital Mach numbers at the inner edge of the disk $M_{\rm in}$ of 5 and 10. We find mass accretion rates to vary considerably on all time scales, with only the Mach 5 model reaching a clear quasi-stationary state. For Mach 10, the model undergoes an outside-in magnetically-driven accretion event occurring on a time scale of $\sim10$ orbital periods of the binary. Both models exhibit spiral shocks inclined with respect to the binary plane, with their position and inclination changing rapidly. However, the time-averaged location of these shocks in the equatorial plane is well-fit by simple linear models. MRI turbulence in the disk generates toroidal magnetic field patterns (butterfly diagrams) that are in some cases irregular, perhaps due to interaction with spiral structure. While many of our results are in good agreement with local studies, we find some features (most notably those related to spiral shocks) can only be captured in global models such as studied here. Thus, while global studies remain computationally expensive -- even as idealized models -- they are essential (along with more sophisticated treatment of radiation transport and disk thermodynamics) for furthering our understanding of accretion in binary systems.
description: 30 pages, 13 figures; Accepted for publication in ApJ
A Game-Theoretic Framework for Safety and Security
Creators: name: Zander, Tim
Publisher: name: Karlsruhe
Year: 2019

description: The purpose of this paper is to describe the Framework described in [BG16] in a game theoretic way. The idea behind this is that for modelling security (i. e. the assumption of an intelligent attacker) the language of game theory seems to be a very good choice. Game theory can deal with the problem where the actions of each subject are interdependent, e.g. an attacker will change his strategy whenever a new security feature will prevent his old strategy from succeeding or a new attack seems to be more promising. Moreover, game theory has been thoroughly studied and hence changing the description language of the model, gives access to many results. Additionally, we view the Beyerer and Geisler Framework as part of security economics.
A helium-flash-induced mixing event can explain the lithium abundances of red clump stars
Creators: name: Schwab, Josiah
Publisher: name: arXiv
Year: 2020
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: Observations demonstrate that the surface abundance of $^7{\rm Li}$ in low-mass stars changes dramatically between the tip of the red giant branch and the red clump. This naturally suggests an association with the helium core flash, which occurs between these two stages. Using stellar evolution models and a simple, ad hoc mixing prescription, we demonstrate that the $^7{\rm Li}$ enhancement can be explained by a brief chemical mixing event that occurs at the time of the first, strongest He sub-flash. The amount of $^7{\rm Be}$ already present above the H-burning shell just before the flash, once it mixes into the cooler envelope and undergoes an electron capture converting it to $^7{\rm Li}$, is sufficient to explain the observed abundance at the red clump. We suggest that the excitation of internal gravity waves by the vigorous turbulent convection during the flash may provide a physical mechanism that can induce such mixing.
description: 6 pages, 5 figures; Accepted to ApJL
สภาพและปัญหาของปัจจัยที่เอื้อในการออกแบบระบบการบริหารจัดการงานวิจัย เพื่อพัฒนาวิสาหกิจชุมชน
Creators: name: ศักดิ์ชัย เกียรตินาคินทร์
name: ดวงกมล อัศวมาศ
name: พรทิพย์ เดชพิชัย
name: ธนภูมิ อติเวทิน
Publisher: name: วารสารวิจัย มสด สาขามนุษยศาสตร์และสังคมศาสตร์
Year: 2549
Subjects: วิสาหกิจชุมชน,ระบบการบริหารจัดการงานวิจัย,การพัฒนาผลิตภัณฑ์

description: 1, 2, วารสารวิจัย มสด สาขามนุษยศาสตร์และสังคมศาสตร์
อัตลักษณ์มหาวิทยาลัยราชภัฏสวนดุสิต
Creators: name: วรรณรัตน์ โรจนวิเชียร
name: ศักดิ์สิทธิ์ โรจนวิเชียร
name: จารุวรรณ ปวราจารย์
name: ปิยะนุช เพียร์รัตน์พิมล
Publisher: name: วารสารวิจัย มสด สาขามนุษยศาสตร์และสังคมศาสตร์
Year: 2549
Subjects: อัตลักษณ์,จุดแข็ง,การศึกษา

description: 1, 2, วารสารวิจัย มสด สาขามนุษยศาสตร์และสังคมศาสตร์
Role of the rare-earth doping on the multiferroic properties of BaTiO$_3$: First-principles calculation
Creators: name: Aslla-Quispe, A. P.
name: Miwa, R. H.
name: Guerra, J. D. S.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: Ab-initio spin-polarized Density Functional Theory plus U is used to study the electronic and magnetic properties of tetragonal doped barium titanate (Ba$_{1-x}$Eu$_x$O$_3$) system for different europium (Eu$^{3+}$) concentrations. For this study, the Projector Augmented Wave (PAW) method and a Perdew-Zunger (LSDA) approximation, which has been used for the exchange correlation energy, have been considered taking into account a supercell model. In this model, the spin polarization as well as the Hubbard's potential have been used for the correction of the electron-electron Coulomb interactions in the rare-earth ions partially filled f-orbitals. The electronic bands-structure reveals that the band-gap energy as well as the dielectric properties decreases with the increase of the doping concentration. On the other hand, the modern theory of polarization also shows that the spontaneous electric polarization increases with the increase of the europium content, whereas the states-density reveals ferromagnetic characteristics (with non-zero total magnetization), without an applied magnetic field, for the Ba$_{1-x}$Eu$_x$O$_3$ system. The magnetic properties also reveal to be strongly dependent on the exchange interaction of the strong localized Eu 4f-states in the crystal lattice.
description: 19 pages, 3 tables, 9 figures
The Effect of Quantum Phase Slip Interactions on the Transport of Thin Superconducting Wires
Creators: name: Meidan, Dganit
name: Oreg, Yuval
name: Refael, Gil
Publisher: name: arXiv
Year: 2006
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We study theoretically the effect of interactions between quantum phase slips in a short superconducting wire beyond the dilute phase slip approximation. In contrast to the smooth transition in dissipative Josephson junctions, our analysis shows that treating these interactions in a self consistent manner leads to a very sharp transition with a critical resistance of $R_Q= h/(4e^2)$. The addition of the quasi-particles resistance at finite temperature leads to a quantitative agreement with recent experiments on short MoGe nanowires. Our treatment is complementary to the theory of the thermal activation of phase slips, which is only valid for temperature at the vicinity of the mean field metal to superconductor transition. This self consistent treatment should also be applicable to other physical systems that can be mapped onto similar sine-Gordon models, in the intermediate-coupling regime.
description: 4 pages, 3 figures
On Cognition, Culture, Discourse and Corpora: High Seas and Smitten Hearts
Creators: name: Χαρδαλιάς, Αστέριος Χρήστου
Publisher: name: Aristotle University of Thessaloniki
Year: 2015
Subjects: Γνωσιακή Ικανότητα
Πολιτισμός
Συνεχής Λόγος
Σώματα Κειμένων
Εννοιακή Σύμμειξη
Cognition
Culture
Discourse
Corpora
Conceptual Blending

description: Αυτή η εργασία έχει έναν φιλόδοξο διπλό σκοπό: αφ’ ενός να διαφωτίσει πλευρές της εννοιοποίησης σε περιβάλλοντα πυκνής τροπολογικής γλώσσας και αφ’ ετέρου να διερευνήσει πιθανές διεξόδους μεθοδολογικής επικονίασης μεταξύ της Γλωσσολογίας Σωμάτων Κειμένων και της Γνωσιακής Γλωσσολογίας. Μελετά θαλάσσιες εννοιοποιήσεις της ‘καρδιάς’ σε ένα σώμα κειμένων 260 τραγουδιών της Σύγχρονης Ελληνικής ως μελέτη περίπτωσης, θεωρητικά πλαισιωμένη από συζητήσεις για: (α) Θεωρία Εννοιακής Συνολοκλήρωσης (Conceptual Integration Theory, CIT), σε σχέση με τη γνωσιακή ικανότητα και το συνεχή λόγο (β) Διαμοιρασμένη, Αναδυόμενη, Πολιτιστική Γνωσιακή Ικανότητα (Distributed emergent cultural cognition), σε σχέση με τη γνωσιακή ικανότητα και τον πολιτισμό (γ) Ανάλυση Συνεχούς Λόγου Υποβοηθούμενη από Σώματα Κειμένων (Corpus-Assisted Discourse Analysis, CADS), σε σχέση με το συνεχή λόγο και τα σώματα κειμένων (δ) Ανάλυση Πολιτιστικού Συνεχούς Λόγου (Cultural Discourse Analysis, CuDA), σε σχέση με το συνεχή λόγο και τον πολιτισμό
description: This thesis has an aspirant dual purpose: to both enlighten aspects of conceptualization in environments of dense figuration and to investigate possible avenues for methodological crosspollination between Corpus Linguistics and Cognitive Linguistics. It reviews sea conceptualizations of the ‘heart’ in a corpus of 260 Modern Greek songs as a case study, theoretically framed by a discussion of: (a) Conceptual Integration Theory (CIT), in relation to cognition and discourse; (b) Distributed emergent cultural cognition, in relation to cognition and culture; (c) Corpus-Assisted Discourse Analysis (CADS), in relation to discourse and corpora; (d) Cultural Discourse Analysis (CuDA), in relation to discourse and culture
Personality Trait Detection Using Bagged SVM over BERT Word Embedding Ensembles
Creators: name: Kazameini, Amirmohammad
name: Fatehi, Samin
name: Mehta, Yash
name: Eetemadi, Sauleh
name: Cambria, Erik
Publisher: name: arXiv
Year: 2020
Subjects: subject: Computation and Language (cs.CL)
subject: Artificial Intelligence (cs.AI)
subject: Computers and Society (cs.CY)
subject: Machine Learning (cs.LG)
subject: FOS: Computer and information sciences

description: Recently, the automatic prediction of personality traits has received increasing attention and has emerged as a hot topic within the field of affective computing. In this work, we present a novel deep learning-based approach for automated personality detection from text. We leverage state of the art advances in natural language understanding, namely the BERT language model to extract contextualized word embeddings from textual data for automated author personality detection. Our primary goal is to develop a computationally efficient, high-performance personality prediction model which can be easily used by a large number of people without access to huge computation resources. Our extensive experiments with this ideology in mind, led us to develop a novel model which feeds contextualized embeddings along with psycholinguistic features toa Bagged-SVM classifier for personality trait prediction. Our model outperforms the previous state of the art by 1.04% and, at the same time is significantly more computationally efficient to train. We report our results on the famous gold standard Essays dataset for personality detection.