cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Pressure-robust error estimate of optimal order for the Stokes equations on domains with edges
Creators: name: Apel, Thomas
name: Kempf, Volker
Publisher: name: arXiv
Year: 2020
Subjects: subject: Numerical Analysis (math.NA)
subject: FOS: Mathematics
subject: 65N30, 65N15, 65N12

description: The velocity solution of the incompressible Stokes equations is not affected by changes of the right hand side data in form of gradient fields. Most mixed methods do not replicate this property in the discrete formulation due to a relaxation of the divergence constraint which means that they are not pressure-robust. A recent reconstruction approach for classical methods recovers this invariance property for the discrete solution, by mapping discretely divergence-free test functions to exactly divergence-free functions in the sense of $\boldsymbol{H}(\operatorname{div})$. Moreover, the Stokes solution has locally singular behavior in three-dimensional domains near concave edges, which degrades the convergence rates on quasi-uniform meshes and makes anisotropic mesh grading reasonable in order to regain optimal convergence characteristics. Finite element error estimates of optimal order on meshes of tensor-product type with appropriate anisotropic grading are shown for the pressure-robust modified Crouzeix--Raviart method using the reconstruction approach. Numerical examples support the theoretical results.
A_4 Symmetry and Lepton Masses and Mixing
Creators: name: Koide, Yoshio
Publisher: name: arXiv
Year: 2007
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: Stimulated by Ma's idea which explains the tribimaximal neutrino mixing by assuming an A_4 flavor symmetry, a lepton mass matrix model is investigated. A Frogatt-Nielsen type model is assumed, and the flavor structures of the masses and mixing are caused by the VEVs of SU(2)_L-singlet scalars ϕ_i^u and ϕ_i^d (i=1,2,3), which are assigned to {\bf 3} and ({\bf 1}, {\bf 1}',{\bf 1}'') of A_4, respectively.
description: 13 pages including 1 table, errors in Sec.7 corrected
The prediction and validation of greenhouse tomato yield using mathematical models and expert systems
Creators: name: Tang, Winston C.
Publisher: name: University of British Columbia
Year: 2009

description: Greenhouse tomato yields were predicted using two mathematical models developed in this study - the empirical and deterministic models. Weekly yield predictions for an entire growing season were compared with actual yields and results from an expert system model developed by the Agassiz Research Station. The deterministic math model involved using first principle equations of photosynthesis and respiration to simulate crop growth. Utilizing a known tomato yield conversion factor, net photosynthesis rates (Pnet) were converted to weekly yield predictions and compared with actual recorded yields. A deterministic model using two week cumulations of Pnet converted to yield was used successfully to predict actual tomato yields 6 weeks ahead of time with a root-mean-square-error (RMSE) of 0.38 kg/m2. The empirical math model employed regression techniques to fit historical greenhouse climate data to recorded yields. Correlations between light, temperature, and weekly tomato yields were derived into equations to predict yields for future growing seasons. An empirical model cumulating 3, 6, and 9 weeks of light and temperature data was developed to predict yields 4 weeks ahead of time with a RMSE of 0.45 kg/m2. When one-week-ahead predictions from the Agassiz expert system model were compared with actual recorded yields a RMSE of 0.401 kg/m2 was calculated. The expert system model utilizing trend recognition techniques was also used as a comparison with the two math models. When compared and ranked for prediction accuracy, application flexibility, and user-friendliness, the expert system was chosen as the overall best model for tomato yield prediction.
Σχεδιασμός, υλοποίηση και αξιολόγηση επιμορφωτικών προγραμμάτων : ένα εγχείρημα με στόχο τη μετασχηματιστική μάθηση στα πεδία του πολιτισμού και της ιστορίας.
Creators: name: Μαυροσκούφης, Δημήτρης Κ.
Publisher: name: Παιδαγωγική Επιθεώρηση
Year: 2015

description: The present project displays the phases of planning, realization and evaluation of an innovative programme concerning the in-service training of teachers who work in multicultural Gymnasiums.
The project’s first part refers to the theoretical base, which supports the con¬ception of the whole attempt, an attempt which had the transformative learning as its main target, and cultural education and history education as its focus.
In the second part there is a description of the methodology followed for the programme’s planning, realization and evaluation, its phases and thematic units.
Eventually, there is a presentation of the results and a complete critical as¬sessment of this effort.
description: Παιδαγωγική Επιθεώρηση, Vol. 48 (2009)
Influence of NLTE effects in Fe I lines on inverted atmosphere II. 6301 A and 6302 A lines formed in 3DNLTE
Creators: name: Smitha, H. N.
name: Holzreuter, R.
name: van Noort, M.
name: Solanki, S. K.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: This paper forms the second part of our study on how the neglect of NLTE conditions in the formation of Fe I 6301.5 A and the 6302.5 A lines influences the atmosphere obtained by inverting their profiles in LTE. The main cause of NLTE effects is the line opacity deficit due to the excess ionization of the Fe I atoms by the UV photons in the Sun. In the first paper, the above photospheric lines were assumed to have formed in 1DNLTE and the effects of horizontal radiation transfer (RT) were neglected. In the present paper, the iron lines are computed in 3DNLTE. We investigate the influence of horizontal RT on the inverted atmosphere and how it can enhance or reduce the errors due to the neglect of 1DNLTE effects. The iron lines are computed in LTE, 1DNLTE and 3DNLTE. They all are inverted using an LTE inversion code. The atmosphere from the inversion of LTE profiles is taken as the reference model. The test atmospheres from the inversion of 1DNLTE and 3DNLTE profiles are compared with it. The differences between models are analysed and correspondingly attributed to NLTE and 3D effects. The effects of horizontal RT are evident in regions surrounded by strong horizontal gradients in temperature. In some regions, the 3D effects enhance the 1DNLTE effects while in some, they weaken. The errors due to neglecting the 3D effects are less than 5% in temperature while the errors are mostly less than 20% in both velocity and magnetic field strength. These errors are found to survive spatial and spectral degradation. The neglect of horizontal RT is found to introduce errors in the derived atmosphere. How large the errors are depends on how strong the local horizontal gradients are in temperature. Compared to the 1DNLTE effect, the 3D effects are more localised to specific regions in the atmosphere and overall less dominant.
description: Accepted for publication in A&A. Abstract abridged for arxiv submission
Ο νοερός αριθμητικός υπολογισμός των μαθητών της Γ' τάξης του Δημοτικού σχολείου στις προσθέσεις και αφαιρέσεις διψήφιων αριθμών.
Creators: name: Καραντζής, Ιωάννης Δ.
name: Τόλλου, Μαρία
Publisher: name: Παιδαγωγική Επιθεώρηση
Year: 2015

description: The purpose of the present study was to investigate what kinds of strategies do students of the third grade of elementary school (8 years old) use when they add and subtract mentally two-digit numbers. 90 students of the third grade (52 boys and 38 girls) participated in the study. The results showed that the children used more flexible strategies in the additions than in subtractions. This implies the particular difficulty of subtractions. Also, the students’ difficulties in subtractions and additions that involve regrouping procedures (“carrying” or “borrowing”) are considerably increased. Finally, the students based mainly on the traditional algorithm – vertical action, a strategy that has been taught in the school. Students’ persistence in this strategy probably influence the emergence of other spontaneous mental strategies.
description: Παιδαγωγική Επιθεώρηση, Vol. 48 (2009)
Discreteness and the origin of probability in quantum mechanics
Creators: name: Buniy, Roman V.
name: Hsu, Stephen D. H.
name: Zee, A.
Publisher: name: arXiv
Year: 2006
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Attempts to derive the Born rule, either in the Many Worlds or Copenhagen interpretation, are unsatisfactory for systems with only a finite number of degrees of freedom. In the case of Many Worlds this is a serious problem, since its goal is to account for apparent collapse phenomena, including the Born rule for probabilities, assuming only unitary evolution of the wavefunction. For finite number of degrees of freedom, observers on the vast majority of branches would not deduce the Born rule. However, discreteness of the quantum state space, even if extremely tiny, may restore the validity of the usual arguments.
description: 5 pages, revtex, 1 figure. Revised version, to appear in Physics Letters B. (Small clarifcation, references added.)
Study of the Kondo and high-temperature limits of the slave-boson and X-boson methods
Creators: name: Nunes, Lizardo H. C. M.
name: Figueira, M. S.
name: Foglio, M. E.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: In this Letter we study the periodic Anderson model, employing both the slave-boson and the X-boson approaches in the mean field approximation. We investigate the breakdown of the slave-boson at intermediate temperatures when the total occupation number of particles Nt = Nf + Nc is keep constant, where Nf and Nc are respectively the occupation numbers of the localized and conduction electrons, and we show that the high-temperature limit of the slave-boson is Nf = Nc = Nt /2. We also compare the results of the two approaches in the Kondo limit and we show that at low-temperatures the X-boson exhibits a phase transition, from the Kondo heavy fermion (K-HF) regime to a local moment magnetic regime (LMM).
Kondo-Dicke resonances in electronic transport through triple quantum dots
Creators: name: Trocha, Piotr
name: Barnaś, Józef
Publisher: name: arXiv
Year: 2008
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: Electronic transport through a triple quantum dot system, with only a single dot coupled directly to external leads, is considered theoretically. The model includes Coulomb correlations in the central dot, while such correlations in the two side-coupled dots are omitted. The infinite-U mean-field slave-boson approach is used to obtain basic transport characteristics in the Kondo regime. When tuning position of the side-coupled dots' levels, transition from subradiant to superradiant like mode (and vice versa) has been found in the spectral function, in analogy to the Dicke effect in atomic physics. Bias dependence of the differential conductance and zero frequency shot noise is also analysed.
description: 8 pages, 10 figures
MPEC 2024-T145 : 2024 SP14
Creators: name: Minor Planet Center Staff
Publisher: name: The Minor Planet Center
Year: 2024
Subjects: subject: Small Solar System bodies
valueUri: http://astrothesaurus.org/uat/1469
subject: 2024 SP14

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.
Συχνότητα και είδος στρεσογόνων ερεθισμάτων μαθητών δημοτικού,γυμνασίου και λυκείου στην καθημερινή ζωή, στο σχολείο και στο μάθημα της φυσικής αγωγής.
Creators: name: Κάμτσιος, Σπυρίδων
Publisher: name: Παιδαγωγική Επιθεώρηση
Year: 2015

description: The purpose of the study was to identify the daily sources of stress in primary and secondary school children. The research was took place in two periods. In the first one thirty pupils interviewed and their perceived sources of stress was presented in three levels: daily stress, school stress and stress in physical edu¬cation lesson. The second period of the research (300 pupils participated), was held through questionnaires. From the results it was found out that school is a major source of stress, since physical education lesson isn’t, expect from the perceived physical appearance during the physical education lesson. The results of the study imply the need of the reinforcement of health education and the implementation through physical education lesson, in order to strengthen the students’ coping skills.
description: Παιδαγωγική Επιθεώρηση, Vol. 48 (2009)
MPEC 2024-T146 : 2024 TH3
Creators: name: Minor Planet Center Staff
Publisher: name: The Minor Planet Center
Year: 2024
Subjects: subject: Small Solar System bodies
valueUri: http://astrothesaurus.org/uat/1469
subject: 2024 TH3

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.
Properties of few-body systems in relativistic quantum mechanics and constraints from transformations under Poincaré space-time translations
Creators: name: Desplanques, B.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: Different approaches have been applied to the calculation of form factors of various hadronic systems within relativistic quantum mechanics. In a one-body current approximation, they can lead to results evidencing large discrepancies. Looking for an explanation of this spreading, it is shown that, for the largest part, these discrepancies can be related to a violation of Poincaré space-time translation invariance. Beyond energy-momentum conservation, which is generally assumed, fulfilling this symmetry implies specific relations that are generally ignored. Their relevance within the present context is discussed in detail both to explain the differences between predictions and to remove them.
description: 5 pages, to be published in the proceedings of the 18th International Conference on Few-Body Problems in Physics (Santos, Sao Paulo, Brasil)
Bose atoms in a trap: a variational Monte Carlo formulation for the universal behavior at the Van der Waals length scale
Creators: name: Khan, Imran
name: Gao, Bo
Publisher: name: arXiv
Year: 2006
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: We present a variational Monte Carlo (VMC) formulation for the universal equations of state at the Van der Waals length scale [B. Gao, J. Phys. B \textbf{37}, L227 (2004)] for $N$ Bose atoms in a trap. The theory illustrates both how such equations of state can be computed exactly, and the existence and the importance of long-range atom-atom correlation under strong confinement. Explicit numerical results are presented for N=3 and 5, and used to provide a quantitative understanding of the shape-dependent confinement correction that is important for few atoms under strong confinement.
description: 6 pages, 4 figures
Consequences of parameterization choice on eclipsing binary light curve solutions
Creators: name: Korth, J.
name: Moharana, A.
name: Pešta, M.
name: Czavalinga, D. R.
name: Conroy, K. E.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: Eclipsing Binaries (EBs) are known to be the source of most accurate stellar parameters, which are important for testing theories of stellar evolution. With improved quality and quantity of observations using space telescopes like {\it TESS}, there is an urgent need for accuracy in modeling to obtain precise parameters. We use the soon to be released \texttt{PHOEBE 2.3} EB modeling package to test the robustness and accuracy of parameters and their dependency on choice of parameters for optimization.
description: The paper presents the results of a project carried out at the ERASMUS+ GATE summer school and is accepted for publication in CAOSP
Παιδί και θάνατος : Πώς σχολείο και παιδαγωγός αντιμετωπίζουν παιδιά προσχολικής και πρώιμης σχολικής ηλικίας που πενθούν.
Creators: name: Σαλπιστής, Σάββας
Publisher: name: Παιδαγωγική Επιθεώρηση
Year: 2015

description: The death of a beloved person during childhood is not unusual. In spite of this fact, our knowledge about the needs of a child for support under such circum¬stances are relatively limited. The reactions and the griefing process of the child are quite similar with those of the adults with some differences. The pur¬pose of this article is initially to provide a theoretical approach of death and loss through a description of children’s perceptions of death in different age groups and of their reactions after an important loss. Finally, having this theo¬retical approach as a starting-point, the aim of the paper is to propose methods and strategies to handle crises by the school and the teachers, as well as to in¬corporate the death as a subject in daily teaching.
description: Παιδαγωγική Επιθεώρηση, Vol. 48 (2009)
Η εξέλιξη του σχολείου και ο επαγγελματισμός του εκπαιδευτικού.
Creators: name: Πανταζής, Βασίλειος
Publisher: name: Παιδαγωγική Επιθεώρηση
Year: 2015

description: Im Lichte professionstheoretischer Problemstellungen und zugleich konkreter Rekonstruktionen aus padagogischen und an die Padagogik angrenzenden Handlungsfeldem werden in diesem Beitrag Professionalisierungstendenzen padagogischen Handelns untersucht. Es wird grandlegend geklart, was den Charakter und die Bedeutung von Professionen ausmacht.
Das inhaltliche Problem, welches hinter der Frage nach der speziellen Form von Professionalitat bei der Ausiibung des Lehrerberufs steht, ist keineswegs erst seit dem Lfbergang von kulturtheoretisch-geisteswissenschaftlichen zu sozialwissenschaftlichen Denkformen in der Padagogik aktuell. Das Stichwort „Professionalitat“ bildet vielmehr lediglich den modemen Verdichtungspunkt einer ebenso traditionsreichen wie grundsatzlichen, in den unterschiedlichsten Semantiken gefuhrten Auseinandersetzung und das spezifische Aufgabenfeld sowie die besonderen Kompetenzen des Lehrerberufs.
description: Παιδαγωγική Επιθεώρηση, Vol. 48 (2009)
Constructing Lefschetz-type fibrations on four-manifolds
Creators: name: Gay, David T.
name: Kirby, Robion
Publisher: name: arXiv
Year: 2007
Subjects: subject: Geometric Topology (math.GT)
subject: Symplectic Geometry (math.SG)
subject: FOS: Mathematics
subject: 57M50 (Primary), 57R17 (Secondary)

description: We show how to construct broken, achiral Lefschetz fibrations on arbitrary smooth, closed, oriented 4-manifolds. These are generalizations of Lefschetz fibrations over the 2-sphere, where we allow Lefschetz singularities with the non-standard orientation as well as circles of singularities corresponding to round 1-handles. We can also arrange that a given surface of square 0 is a fiber. The construction is easier and more explicit in the case of doubles of 4-manifolds without 3- and 4-handles, such as the homotopy 4-spheres arising from nontrivial balanced presentations of the trivial group.
description: 42 pages, 13 figures
Superconductor-insulator transition induced by pressure within the X-boson approach
Creators: name: Nunes, Lizardo H. C. M.
name: Figueira, M. S.
name: de Mello, E. V. L.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: The pressure induced superconducting phase diagram is calculated for an extension of the periodic Anderson model (PAM) in the $ U = \infty $ limit taking into account the effect of a nearest neighbor attractive interaction between f-electrons. We analyze the role of the chemical potential compared to several plots of the f-band density of states and we also found a superconductor-insulator transition induced by pressure when the chemical potential crosses the hybridization gap.
Η ξένη/δεύτερη γλώσσα στην προσχολική ηλικία: προβληματισμοί και κατευθύνσεις.
Creators: name: Μότσιου, Ελένη
Publisher: name: Παιδαγωγική Επιθεώρηση
Year: 2015

description: Recently much attention has been focused on the importance of early second/ foreign language learning (FLL). First, we summarize what recent research has said about the Critical Period Hypothesis, connected to preschool vs adult foreign language learning. Then we present some important implications for early FLL from a linguistic and social-cognitive point of view: which are the general characteristics of child language and thought that could be used in con¬structing a teaching methodology (and what kind of methodology is suitable for early learners); finally, we consider in more detail the role of Theory of Mind in children’s early FLL.
description: Παιδαγωγική Επιθεώρηση, Vol. 48 (2009)
Μελέτη με ερωτηματολόγιο για τη διάρθρωση των καλλιεργειών στη Χαλκιδική: Οι προτιμήσεις των παραγωγών:
Creators: name: Βαμβακά, Αικατερίνη Βασιλείου
Publisher: name: Aristotle University of Thessaloniki
Year: 2015
Subjects: Δειγματοληψία
Ερωτηματολόγιο
Αξιοπιστία
Παραγωγοί
Καλλιέργειες
Επιλογή καλλιεργειών
Sampling
Questionnaire
Reliability
Farmers
Plants
Choosing crops

description: Τα επίσημα στατιστικά στοιχεία, ενώ απαντούν στην ερώτηση «τικαλλιεργούν οι παραγωγοί»,δενμπορούννα απαντήσουν στο «γιατί καλλιεργούν τις συγκεκριμένες καλλιέργειες». Σκοπός της παρούσας έρευνας είναι να διερευνήσει τα αίτια της επιλογής των παραγωγών, όσον αφορά στα είδη που καλλιεργούν.Στην δειγματοληπτική έρευνα που έγινε σε παραγωγούς του νομού Χαλκιδικής, χρησιμοποιήθηκε ως τεχνική συλλογής πληροφοριών ένα ερωτηματολόγιο. Το ερωτηματολόγιο καταρτίστηκε αποκλειστικά για το σκοπό αυτό. Η μέθοδος δειγματοληψίας που χρησιμοποιήθηκε ήταν η Συστηματική Δειγματοληψία. Από τα αποτελέσματα της έρευνας αποδεικνύεται ότι πέρα από τους οικονομικούς λόγους, η συνήθεια και η παράδοση είναι παράγοντες που κατευθύνουν τις επιλογές των παραγωγών.
description: Although official statistics answer questions like “what the farmers cultivate” they do not respond to questions like “why they do so”. Theaim of this research is to clarify the reasons for which farmers make their choices on plants cultivation.Inthe present sampling project which was held among Chalkidiki's farmers, a questionnaire was used, as a method of information collection. The questionnaire was designed exclusively for this aim. The systematic sampling method was used. The results of the above thesis justify that beyond the economical reasons, habitual practices and tradition are the main factors upon which the choices are being directed.
The Tracy--Widom limit for the largest eigenvalues of singular complex Wishart matrices
Creators: name: Onatski, Alexei
Publisher: name: arXiv
Year: 2008
Subjects: subject: Probability (math.PR)
subject: FOS: Mathematics
subject: 60F05, 62E20 (Primary)

description: This paper extends the work of El Karoui [Ann. Probab. 35 (2007) 663--714] which finds the Tracy--Widom limit for the largest eigenvalue of a nonsingular $p$-dimensional complex Wishart matrix $W_{\mathbb{C}}(Ω_p,n)$ to the case of several of the largest eigenvalues of the possibly singular $(n
description: Published in at http://dx.doi.org/10.1214/07-AAP454 the Annals of Applied Probability (http://www.imstat.org/aap/) by the Institute of Mathematical Statistics (http://www.imstat.org)
Επαγγελματική επάρκεια εκπαιδευτικών : ευρωπαϊκές εξελίξεις και επιταγές.
Creators: name: Ζμας, Αριστοτέλης
Publisher: name: Παιδαγωγική Επιθεώρηση
Year: 2015

description: In recent years, the discourse about standards has become central to policy dis¬cussions about teacher education. It has been argued that their implementation leads to higher accountability and performance management for teachers. How¬ever, the prescription of teacher’s complex role through standards can been critiqued as technical rationality. At the same time, cross-national convergence in educational policy has been stimulated by supranational organizations such as the European Union. Its services collect information about national systems of teacher education, identify common trends and aspire to ensure high quality teacher education throughout the EU. However, there is strong differentiation among the national systems of teacher education. Every national system is shaped by its historical, economic and social context. Despite the convergence in challenges and problems, educational solutions remain specific in every country. The policy priorities of international organizations must take account of the different cultural perspectives of national teacher education systems.
description: Παιδαγωγική Επιθεώρηση, Vol. 48 (2009)
From global to spatially resolved in low-redshift galaxies
Creators: name: Sanchez, S. F.
name: Walcher, C. J.
name: Lopez-Coba, C.
name: Barrera-Ballesteros, J. K.
name: Mejia-Narvaez, A.
name: Espinosa-Ponce, C.
name: Camps-Fariña, A.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: Our understanding of the structure, composition and evolution of galaxies has strongly improved in the last decades, mostly due to new results based on large spectroscopic and imaging surveys. In particular, the nature of ionized gas, its ionization mechanisms, its relation with the stellar properties and chemical composition, the existence of scaling relations that describe the cycle between stars and gas, and the corresponding evolution patterns have been widely explored and described. More recently, the introduction of additional techniques, in particular Integral Field Spectroscopy, and their use in large galaxy surveys, have forced us to re-interpret most of those recent results from a spatially resolved perspective. This review is aimed to complement recent efforts to compile and summarize this change of paradigm in the interpretation of galaxy evolution. In particular we cover three particular aspects not fully covered in detail in recent reviews: (i) the spatially resolved nature of the ionization properties in galaxies and the confusion introduced by considering just integrated quantities; (ii) the nature of the global scaling relations and their relations with the spatially resolved ones; and (iii) the dependence of the radial gradients and characteristic properties of the stellar populations and ionized gas on stellar mass and galaxy morphology. To this end we replicate published results, and present novel ones, based on the largest compilation of IFS data of galaxies in the nearby universe to date.
description: 42 pages, 16 figures, accepted for publication in RMxAA
Overcharging dilaton black holes in 2+1 dimensions to extremality and beyond
Creators: name: Düztaş, Koray
name: Jamil, Mubasher
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: We test whether static charged dilaton black holes in 2+1 dimensions can be turned into naked singularities, by sending in test particles from infinity. We derive that overcharging is possible and generic for both extremal and nearly extremal black holes. Our analysis also imply that nearly extremal charged dilaton black holes can be continuously driven to extremality and beyond, unlike nearly extremal Baunados-Teitelboim-Zanelli, Kerr and Reissner-Nordström black holes which are overspun or overcharged by a discrete jump. Thus the weak form of the cosmic censorship conjecture and the third law of black hole thermodynamics are both violated in the interaction of charged dilaton black holes in 2+1 dimensions, with test particles. We also derive that there exists no points where the heat capacity vanishes or diverges in the transition from black holes to naked singularities. The phase transitions that could potentially prevent the formation of naked singularities do not occur.
description: 9 pages, 1 figure, to appear in IJGMMP
Why coronal mass ejections are necessary for the dynamo
Creators: name: Brandenburg, Axel
Publisher: name: arXiv
Year: 2007
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: Large scale dynamo-generated fields are a combination of interlocked poloidal and toroidal fields. Such fields possess magnetic helicity that needs to be regenerated and destroyed during each cycle. A number of numerical experiments now suggests that stars may do this by shedding magnetic helicity. In addition to plain bulk motions, a favorite mechanism involves magnetic helicity flux along lines of constant rotation. We also know that the sun does shed the required amount of magnetic helicity mostly in the form of coronal mass ejections. Solar-like stars without cycles do not face such strong constraints imposed by magnetic helicity evolution and may not display coronal activity to that same extent. I discuss the evidence leading to this line of argument. In particular, I discuss simulations showing the generation of strong mean toroidal fields provided the outer boundary condition is left open so as to allow magnetic helicity to escape. Control experiments with closed boundaries do not produce strong mean fields.
description: 2 pages, 2 figures, to appear in Highlights of Astronomy, ed. K. G. Strassmeier & A. Kosovichev, Astron. Soc. Pac. Conf. Ser
Regularization-based Continual Learning for Anomaly Detection in Discrete Manufacturing
Creators: name: Maschler, Benjamin
name: Pham, Thi Thu Huong
name: Weyrich, Michael
Publisher: name: arXiv
Year: 2021
Subjects: subject: Machine Learning (cs.LG)
subject: Artificial Intelligence (cs.AI)
subject: Neural and Evolutionary Computing (cs.NE)
subject: FOS: Computer and information sciences

description: The early and robust detection of anomalies occurring in discrete manufacturing processes allows operators to prevent harm, e.g. defects in production machinery or products. While current approaches for data-driven anomaly detection provide good results on the exact processes they were trained on, they often lack the ability to flexibly adapt to changes, e.g. in products. Continual learning promises such flexibility, allowing for an automatic adaption of previously learnt knowledge to new tasks. Therefore, this article discusses different continual learning approaches from the group of regularization strategies, which are implemented, evaluated and compared based on a real industrial metal forming dataset.
description: 6 pages, 5 figures, 3 tables, submitted to the CIRP Conference on Manufacturing Systems 2021
An Exact SU(2) Symmetry and Persistent Spin Helix in a Spin-Orbit Coupled System
Creators: name: Bernevig, B. Andrei
name: Orenstein, J.
name: Zhang, Shou-Cheng
Publisher: name: arXiv
Year: 2006
Subjects: subject: Other Condensed Matter (cond-mat.other)
subject: FOS: Physical sciences

description: Spin-orbit coupled systems generally break the spin rotation symmetry. However, for a model with equal Rashba and Dresselhauss coupling constant (the ReD model), and for the $[110]$ Dresselhauss model, a new type of SU(2) spin rotation symmetry is discovered. This symmetry is robust against spin-independent disorder and interactions, and is generated by operators whose wavevector depends on the coupling strength. It renders the spin lifetime infinite at this wavevector, giving rise to a Persistent Spin Helix (PSH). We obtain the spin fluctuation dynamics at, and away, from the symmetry point, and suggest experiments to observe the PSH.
description: 5 pages, 3 figures
Ενδυματολογικός Κώδικας των Ηρώων στο Παιδικό Εικονογραφημένο Βιβλίο Παραμύθια και Άλλα της Πηνελόπης Δέλτα. Μία συγκριτική μελέτη των εκδόσεων 1915 και 1998.
Creators: name: Χαϊδεμενοπούλου, Γεωργία ΝΙκολάου
Publisher: name: Aristotle University of Thessaloniki
Year: 2014
Subjects: Εικονογραφημένο παιδικό βιβλίο
Σημειωτική Μόδας
Σημειωτική Λογοτεχνίας
illustrated children's book
fashion semiotics
semiotics of literature

description: Η παρούσα έρευνα είναι μία μελέτη περίπτωσης του βιβλίου της Πηνελόπης Δέλτα Παραμύθια και Άλλα. Αναλύθηκαν δύο παραμύθια (Η Καρδιά της Βασιλοπούλας και Πρωτοχρονιάτικο Παραμύθι) και δύο ιστορικά αφηγήματα (Ο Φόρος της Δόξας και Μεσολογγίτικα Χριστούγεννα), με σκοπό να μελετηθεί η διαφορετική θεματολογία και η εικονογράφηση και να συγκριθεί η παλαιότερη έκδοση του βιβλίου με την πιο πρόσφατη. Στόχοι της έρευνας ήταν η διερεύνηση του ενδυματολογικού κώδικα στις παραπάνω δύο εκδόσεις και οι διαφοροποιήσεις που έχουν προκύψει στο εκδοτικό σημειωτικό σύστημα από τους εκάστοτε εικονογράφους. Διερευνήθηκε ο ρόλος των Ηρώων και ο ενδυματολογικός κώδικας στις δύο εκδόσεις, η αγκύρωση κειμένου και εικόνας στις δύο εκδόσεις του παραμυθιού. Έγινε σύγκριση του ενδυματολογικού κώδικα των ηρώων στις δύο διαχρονικά διαφορετικές εκδόσεις του ίδιου παραμυθιού και μελετήθηκαν οι προσαρμογές που έγιναν στην εικονογράφηση του παραμυθιού. Εφαρμόστηκε η θεωρία σημειωτικής της μόδας και του συστήματος μόδας του Γάλλου σημειολόγου Roland Barthes. Αναλύθηκε σύμφωνα με τον Barthes το ένδυμα των ηρώων από άποψη της langue (κοινωνική άποψη) και της parole (ατομική άποψη). Αναλύθηκαν τα κείμενα με βάση τη θεωρία της Δομικής Σημασιολογίας του Greimas. Κάθε παραμύθι της Δέλτα ανήκε και σε μία διαφορετική εποχή, κάτι που διαπιστώθηκε από το είδος ένδυσης των ηρώων που παρέπεμπε σε κάποια εποχή. Διαφορετική η μόδα κάθε εποχής και συμπεράναμε επομένως ότι οι δύο εικονογράφοι τήρησαν τα ενδυματολογικά δεδομένα των εποχών στις οποίες διαδραματίζονται οι ιστορίες.
description: It is known that clothing is a code that conveys information such as gender, age, economic status, traditions etc. Clothing is a strong conductor of culture between the transmitter, who is the illustrator and the receiver, the reader. The dress code refers clearly to our social and economic status and our national identity. This research is a case study of the book of Penelope Delta, Fairy Tales and Others. The aim of our research is to study the different themes and the different illustrations of the fairy tales and to compare the oldest versions (1915) with the news (1998) through a semiotic approach. The results of our research show that in the new version, comparing with the old one, the illustration is richer and contains more images, with a long variety of colors. We observe that the illustrators follow the fashion and the clothing system, of the time that the story was taken place. Through the illustration, we see how strong the dress code is, by transmitting messages and promoting the communication, such as language and every other human code.
Comparison between Ethical and Islamic Investment
Creators: name: Ali Abdalsalam
Publisher: name: Zenodo
Year: 2023

description: Ethical investment and Islamic investment are two distinct approaches to investing that prioritize certain valuesand principles. Ethical investment, often aligned with socially responsible investing, focuses on companies that adhere to moralprinciples, environmental sustainability, and social responsibility. Islamic investment, on the other hand, is based on theprinciples of Islamic finance. It adheres to Sharia law, which prohibits investments in businesses involved in activities likealcohol, gambling, and pork production. It also avoids interest (Riba), as earning or paying interest is considered exploitative.Both ethical and Islamic investments share a commitment to moral principles and societal good. However, they differ in theirfoundational guidelines: ethical investment is broadly based on secular moral principles, while Islamic investment strictlyfollows religious doctrine.This paper compares and contrast between these two types of investment reveal how different ethical frameworks can shape investment strategies, and how these strategies can be implemented to align financial goals with personal or religious values.
Heuristic-based Mining of Service Behavioral Models from Interaction Traces
Creators: name: Kabir, Muhammad Ashad
name: Han, Jun
name: Hossain, Md. Arafat
name: Versteeg, Steve
Publisher: name: arXiv
Year: 2020
Subjects: subject: Software Engineering (cs.SE)
subject: FOS: Computer and information sciences

description: Software behavioral models have proven useful for emulating and testing software systems. Many techniques have been proposed to infer behavioral models of software systems from their interaction traces. The quality of the inferred model is critical to its successful use. While generalization is necessary to deduce concise behavioral models, existing techniques of inferring models, in general, overgeneralize what behavior is valid. Imprecise models include many spurious behaviors, and thus compromise the effectiveness of their use. In this paper, we propose a novel technique that increases the accuracy of the behavioral model inferred from interaction traces. The essence of our approach is a heuristic-based generalization and truthful minimization. The set of heuristics include patterns to match input traces and generalize them towards concise model representations. Furthermore, we adopt a truthful minimization technique to merge these generalized traces. The key insight of our approach is to infer a concise behavioral model without compromising its accuracy. We present an empirical evaluation of how our approach improves upon the state-of-the-art specification inference techniques. The results show that our approach mines model with 100% precision and recall with a limited computation overhead.
Leading-twist pion and kaon distribution amplitudes in the gauge-invariant nonlocal chiral quark model from the instanton vacuum
Creators: name: Nam, Seung-il
name: Kim, Hyun-Chul
Publisher: name: arXiv
Year: 2006
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We investigate the leading-twist light-cone distribution amplitudes for the pion and kaon based on the gauge-invariant nonlocal chiral quark model from the instanton vacuum in the presence of external axial-vector currents. We find that the nonlocal contribution from the gauge invariance has much effects on the pion distribution amplitudes, while it changes mildly the kaon ones. We also study the Gegenbauer moments of the distribution amplitudes and compare them with the empirical analysis of the CLEO data.
description: 14 pages, 10 figures
What do we understand from multi-frequency monitoring of microquasars?
Creators: name: Trushkin, S. A.
name: Bursov, N. N.
name: Nizhelskij, N. A.
name: Majorova, E. K.
name: Voitsik, P. A.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We discuss the results of the monitoring programs of the X-ray binaries with relativistic jets studies. We carried out a multi-frequency (1-30 GHz) daily monitoring of the radio flux variability of the microquasars SS433, GRS1915+105, V4641 Sgr and Cyg X-3 with RATAN-600 radio telescope during the recent sets in 2002-2006. We detected a lot of bright short-time flares from GRS 1915+105 which could be associated with active X-ray events. In 2004 we have detected two flares from V4641 Sgr, which followed after recurrent X-ray activity of the transient. From September 2005 to May 2006 and then in July we have daily measured flux densities from Cyg X-3. In January 2006 we detected a drop down of its quiescent fluxes (from 100 to ~20 mJy), then the 1Jy-flare was detected on 2 February 2006 after 18 days of quenched radio emission. The daily spectra of the flare in the maximum were flat from 2 to 110 GHz, using the quasi-simultaneous observations at 110 GHz with the RT45m telescope and the NMA millimeter array of the Nobeyama Radio Observatory in Japan. Several bright radio flaring events (1-15 Jy) followed during the continuing state of very variable and intensive 1-12 keV X-ray emission (~0.5 Crab), which was monitored in the RXTE ASM program. We discuss the various spectral and temporal characteristics of the light curves from the microquasars. Thus we conclude that monitoring of the flaring radio emission is a good tracer of jet activity X-ray binaries.
description: Proceedings VI Microquasar Workshop: Microquasars and beyond, Sept 18-22 2006, Como, Italy, eds: T. Belloni et al., 10 pages, 9 figures, Published online at http://pos.sissa.it/cgi-bin/reader/conf.cgi?confid=33
Near-surface shear layer dynamics
Creators: name: Brandenburg, Axel
Publisher: name: arXiv
Year: 2007
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: The outer surface layers of the sun show a clear deceleration at low latitudes. This is generally thought to be the result of a strong dominance of vertical turbulent motions associated with strong downdrafts. This strong negative radial shear should not only contribute to amplifying the toroidal field locally and to expelling magnetic helicity, but it may also be responsible for producing a strong prograde pattern speed in the supergranulation layer. Using simulations of rotating stratified convection in cartesian boxes located at low latitudes around the equator it is shown that in the surface layers patterns move in the prograde direction on top of a retrograde mean background flow. These patterns may also be associated with magnetic tracers and even sunspot proper motions that are known to be prograde relative to the much slower surface plasma.
description: 11 pages, 8 figures, to appear in Highlights of Astronomy, ed. F. Kupka, I.W. Roxburgh, and K.L. Chan, Astron. Soc. Pac. Conf. Ser
White Skin/ Brown Masks : The Case of ‘White’ Actresses From Silent to Early Sound Period in Bombay
Creators: name: Niazi, Sarah Rahman
Publisher: name: Humboldt-Universität zu Berlin
Year: 2019
Subjects: subject: 306 Kultur und Institutionen
subject: cinema
subject: Bombay
subject: reinvention
subject: Anglo Indian
subject: Jewish
subject: Actress
subject: gender
subject: race

description: My paper explores categories of gender, ethnicity, modernity and performance through the figure of the ‘white’ actress in the early years of Indian cinema (1920-1940). Film was a lucrative site of business for intrepidly ambitious individuals in search of reinvention in Bombay. For women from ‘white’ backgrounds, cinema became a means to recast their identity; helping them reclaim the public sphere in new and radical ways. The trace of ‘white’ actresses in the history of Indian cinema configures and transforms the status of performers and performance from the silent to the early sound period. The industry attracted a large number of Anglo Indian, Eurasian and Jewish girls, who became the first group of women to join the industry uninhibited by the social opprobrium against film work. I use hagiographic records, film reviews and stills to map the roles women from the Anglo Indian and Jewish communities were dressed up to ‘play’ in the films. These roles helped perpetuate certain stereotypes about women from these communities as well as impinged on the ways that their identity was configured. Through the history of the Anglo Indian and Jewish women in the larger public sphere I lay out and highlight the field from where individuals and personalities emerged to participate in the cinematic process. I see the community as marking and inflecting a system of signs on the body of these women through which identity was constructed and their attempts at reinvention were engendered - a process of individuation, of ‘being’ and of being framed within a particular logic of the popular imaginary frames of representation.
(Αυτό) στερεοτυπικές κατασκευές της ελληνικότητας την περίοδο της κρίσης: Μια λογοαναλυτική προσέγγιση.:
Creators: name: Αθανασιάδου, Ελισσάβετ Βασιλείου
Publisher: name: Aristotle University of Thessaloniki
Year: 2015
Subjects: Στερεότυπα
Κρίση
Εθνική ταυτότητα
Stereotypes
Crisis
National identity

description: Η παρούσα εργασία πραγματεύεται την κατασκευή της ελληνικότητας τα χρόνια της κρίσης στον λόγο Ελλήνων πολιτών, αναζητώντας πώς δομείται αυτή μέσα από την χρήση αυτό-στερεοτύπων, αλλά και πώς αναπαρίσταται μέσα από τα στερεότυπα που θεωρούν οι συμμετέχοντες/ουσες στην έρευνα ότι αναπαράγονται στον λόγο των μη Ελλήνων. Στην έρευνα συμμετείχαν πέντε ομάδες εστίασης αποτελούμενες από πέντε άτομα η κάθε μια, και για την ανάλυση των λεγομένων των συμμετεχόντων πραγματοποιήθηκε ανάλυση λόγου εστιασμένη στο περιεχόμενο. Τα αποτελέσματα που προέκυψαν ανέδειξαν στο λόγο των συμμετεχόντων την ανάγκη μιας θετικής εθνικής νοηματοδότησης η οποία επιτυγχάνεται μέσα από ποικίλες ρητορικές στρατηγικές. Τέτοιες είναι η υπενθύμιση της πολιτισμικής ανωτερότητας της αρχαίας ελληνικής παράδοσης, της οποίας συνεχιστής είναι η σύγχρονη Ελλάδα, η εύρεση πολιτισμικά κοντινών συμμάχων σε διεθνές επίπεδο και η φυσικοποίηση εθνικών χαρακτηριστικών. Τέλος, η υπεράσπιση της εθνικής ταυτότητας επιχειρείται και με την αναπαράσταση στο λόγο των συμμετεχόντων αυτών που στερεοτυπούν την ελληνική ταυτότητα, ως εχόντων παγκόσμιο κύρος και απόλυτη εξουσία.
description: This paper discusses the construction of Greekness in the period of crisis in the speech of Greek citizens, looking how it is structured through the use of self-stereotyping, but also how it is represented through the use of stereotypes which participants in the research consider that are being reproduced in the speech of non-Greeks. The research involved five focus groups consisting of five people each, and for the analysis of the participants’ talk discourse analysis focused on content was conducted. The results revealed in the speech of the participants a need for a positive national evaluation which is achieved through various rhetorical strategies. Such strategies are the reminder of the cultural superiority of the ancient Greek tradition, which holdover is the modern Greece, the finding of culturally nearby allies internationally and the naturalization of the national characteristics. Finally, the defense of national identity is attempted through the representation in the participants’ speech of those who stereotype about the Greek identity, as having global prestige and absolute power.
A negative S parameter from Holographic Technicolor
Creators: name: Hirn, Johannes
name: Sanz, Veronica
Publisher: name: arXiv
Year: 2006
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We present a new class of 5D models, Holographic Technicolor, which fulfills the basic requirements for a candidate of comprehensible 4D strong dynamics at the electroweak scale. It is the first Technicolor-like model able to provide a vanishing or even negative tree-level S parameter, avoiding any no-go theorem on its sign. The model is described in the large-N regime. S is therefore computable: possible corrections coming from boundary terms follow the 1/N suppression, and generation of fermion masses and the S parameter issue do split up. We investigate the model's 4D dual, probably walking Technicolor-like with a large anomalous dimension.
description: Version accepted for publication in PRL. Introduction and conclusion extended