cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Longitudinal electromagnetic waves with extremely short wavelength
Creators: name: Sakhno, Denis
name: Koreshin, Eugene
name: Belov, Pavel A.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Optics (physics.optics)
subject: Applied Physics (physics.app-ph)
subject: FOS: Physical sciences

description: Electromagnetic waves in vacuum and most materials have transverse polarization. Longitudinal electromagnetic waves with electric field parallel to wave vector are very rare and appear under special conditions in a limited class of media, for example in plasma. In this work, we study the dispersion properties of an easy-to-manufacture metamaterial consisting of two three-dimensional cubic lattices of connected metallic wires inserted one into another, also known as an interlaced wire medium. It is shown that the metamaterial supports longitudinal waves at extremely wide frequency band from very low frequencies up to the Bragg resonances of the structure. The waves feature unprecedentedly short wavelengths comparable to the period of the material. The revealed effects highlight spatially dispersive response of interlaced wire medium and provide a route toward generating electromagnetic fields with strong spatial variation.
Elastic neutron scattering in Quantum Critical Antiferromagnet Cr$_{0.963}$V$_{0.037}$
Creators: name: Sokolov, D. A.
name: Aronson, M. C.
name: Strycker, G. L.
name: Lumsden, M. D.
name: Nagler, S. E.
name: Erwin, R.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: We have performed elastic neutron scattering studies of the quantum critical antiferromagnet Cr$_{0.963}$V$_{0.037}$. We have found that unlike pure Cr, which orders at two incommensurate wavevectors, Cr$_{0.963}$V$_{0.037}$ orders at four incommensurate and one commensurate wavevectors. We have found strong temperature dependent scattering at the commensurate and incommensurate wavevectors below 250 K. Results indicate that the primary effect of V doping on Cr is the modification of the nesting conditions of the Fermi surface and not the decreasing of the Neel temperature.
description: 2 pages, 2 figures, submitted to SCES07 (to be published in Physica B), typos corrected
Quantum scars and bulk coherence in a symmetry-protected topological phase
Creators: name: Jeyaretnam, Jared
name: Richter, Jonas
name: Pal, Arijeet
Publisher: name: arXiv
Year: 2021
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Formation of quantum scars in many-body systems provides a novel mechanism for enhancing coherence of weakly entangled states. At the same time, coherence of edge modes in certain symmetry protected topological (SPT) phases can persist away from the ground state. In this work we show the existence of many-body scars and their implications on bulk coherence in such an SPT phase. To this end, we study the eigenstate properties and the dynamics of an interacting spin-$1/2$ chain with three-site "cluster" terms hosting a $\mathbb{Z}_2 \times \mathbb{Z}_2$ SPT phase. Focusing on the weakly interacting regime, we find that eigenstates with volume-law entanglement coexist with area-law entangled eigenstates throughout the spectrum. We show that a subset of the latter can be constructed by virtue of repeated cluster excitations on the even or odd sublattice of the chain, resulting in an equidistant "tower" of states, analogous to the phenomenology of quantum many-body scars. We further demonstrate that these scarred eigenstates support nonthermal expectation values of local cluster operators in the bulk and exhibit signatures of topological order even at finite energy densities. Studying the dynamics for out-of-equilibrium states drawn from the noninteracting "cluster basis", we unveil that nonthermalizing bulk dynamics can be observed on long time scales if clusters on odd and even sites are energetically detuned. In this case, cluster excitations remain essentially confined to one of the two sublattices such that inhomogeneous cluster configurations cannot equilibrate and thermalization of the full system is impeded. Our work sheds light on the role of quantum many-body scars in preserving SPT order at finite temperature and the possibility of coherent bulk dynamics in models with SPT order beyond the existence of long-lived edge modes.
description: 14 pages, 13 figures + references
Differential response rates in postal and Web-based surveys in older respondents
Creators: name: Bech, Mickael
name: Kristensen, Morten Bo
Publisher: name: European Survey Research Association
Year: 2009
Subjects: response rates; response behaviour; survey research; online survey; postal survey

description: Response rates were compared across a postal and a Web-based survey containing the same questions about preferences for future for the design of future nursing homes which were sent to a random sample of 10,000 individuals aged 50-75 years. The 10,000 individuals were randomly allocated to receive a postal questionnaire or a letter with a Web link to an online version of the same questionnaire. The Web-based survey gave a significantly lower response rate than the postal survey. The Web-based version improved the sample representativeness with respect to gender but worsened the representativeness with respect to age. Respondents' characteristics in the Web-based survey differed significantly from those of respondents in the postal survey with respect to income, education, civil status and health status. The Web-based version improved data quality by significantly lowering the number of item non-response and 'don't know' answers. Respondents found it easier to answer the Web-based survey. The cost per response was significantly higher for the Web-based survey because of the significantly lower response rate compared to the postal survey.
description: Survey Research Methods, Vol 3, No 1 (2009)
Νοητικά προσβάσιμα μουσειοπαιδαγωγικά προγράμματα για επισκέπτες που βρίσκονται στο φάσμα του αυτισμού: μια έρευνα δράσης
Creators: name: Ράπτη, Ειρήνη Μιχαήλ
Publisher: name: Aristotle University of Thessaloniki
Year: 2019
Subjects: Αυτισμός
Μουσειακή εκπαίδευση
Προσβασιμότητα
Autism
Museum Education
Accessibility

description: Η παρούσα μελέτη αναπτύσσεται σε τρεις ενότητες και πραγματεύεται το ζήτημα των εκπαιδευτικών προγραμμάτων και των μουσειακών δράσεων από την οπτική της προσβασιμότητας τους προς τους επισκέπτες που βρίσκονται στο φάσμα του αυτισμού. Η πρώτη ενότητα αναφέρεται στα μουσεία, συγκεκριμένα αναλύει την πορεία που ακολούθησαν τα μουσεία για να φτάσουν στην σύγχρονη μορφή τους, ενώ παράλληλα αναλύεται ο ρόλος και η σημασία της μουσειακής εκπαίδευσης μέσα σε αυτά. Έτσι, αναδεικνύεται το μέγεθος της αναγκαιότητας για επαναπροσδιορισμό της σχέσης μουσείων και αυτιστικών ατόμων, οι οποίοι ουσιαστικά ανήκουν στους μη επισκέπτες. Η δεύτερη ενότητα αναφέρεται στα δυνατά και αδύναμα χαρακτηριστικά αυτής της ειδικής κατηγορίας εν δυνάμει επισκεπτών αλλά και πως μπορούν να αξιοποιηθούν από τα μουσεία. Η τρίτη ενότητα με την χρήση του ερευνητικού εργαλείου της έρευνας δράσης απαντάει στο εξής ερευνητικό ερώτημα: Ποια εργαλεία και ποιες γνώσεις θα μπορούσαν να βοηθήσουν τους μουσειοπαιδαγωγούς ώστε να προβαίνουν στις κατάλληλες τροποποιήσεις στα μουσειοπαιδαγωγικά τους προγράμματα και να τα καθιστούν νοητικά προσβάσιμα για άτομα που βρίσκονται στο φάσμα του αυτισμού; Η έρευνα καταλήγει σε δεκατρία συμπεράσματα χρήσιμα για του μουσειοπαιδαγωγούς που επιθυμούν να τροποποιήσουν τα μουσειοπαιδαγωγικά τους προγράμματα ώστε αυτά να είναι νοητικά προσβάσιμα σε επισκέπτες που βρίσκονται στο φάσμα του αυτισμού
description: The present study is developed in three sections and deals with the issue of inclusive museum educational programs for people with autism. The first section examines the chronicle of the museum evolution, as well as the development and the importance of the museum education. Autistic visitors face a number of barriers in museums, therefore it is imperative to redefine the relationship between museum and autistic visitors. The second section examines the pros and cons of autism, so that we could pinpoint exactly why the people with autism numbered among the non-visitors. The third section, using action research, identify the most effective educational methods and techniques that can be followed by museum educators to make their educational programs mentally accessible for the visitors with ASD. Triangulation was used to work through the survey data and we came to a conclusion of 13 best practices, tools and tactics, which could alter museum educational programs to inclusive one for people on the autism spectrum
description: Σε συνεργασία με το Παιδαγωγικό τμήμα Δημοτικής Εκπαίδευσης (Πανεπιστήμιο Δυτικής Μακεδονίας)
Founding quantum theory on the basis of consciousness
Creators: name: Manousakis, Efstratios
Publisher: name: arXiv
Year: 2006
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: In the present work, quantum theory is founded on the framework of consciousness, in contrast to earlier suggestions that consciousness might be understood starting from quantum theory. The notion of streams of consciousness, usually restricted to conscious beings, is extended to the notion of a Universal/Global stream of conscious flow of ordered events. The streams of conscious events which we experience constitute sub-streams of the Universal stream. Our postulated ontological character of consciousness also consists of an operator which acts on a state of potential consciousness to create or modify the likelihoods for later events to occur and become part of the Universal conscious flow. A generalized process of measurement-perception is introduced, where the operation of consciousness brings into existence, from a state of potentiality, the event in consciousness. This is mathematically represented by (a) an operator acting on the state of potential-consciousness before an actual event arises in consciousness and (b) the reflecting of the result of this operation back onto the state of potential-consciousness for comparison in order for the event to arise in consciousness. Beginning from our postulated ontology that consciousness is primary and from the most elementary conscious contents, such as perception of periodic change and motion, quantum theory follows naturally as the description of the conscious experience.
description: 41 pages, 3 figures. To be published in Foundations of Physics, Vol 36 (6) (June 2006), published online at http://dx.doi.org/10.1007/s10701-006-9049-9
Lectures on black holes and the AdS_3 / CFT_2 correspondence
Creators: name: Kraus, Per
Publisher: name: arXiv
Year: 2006
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We present a detailed discussion of AdS_3 black holes and their connection to two-dimensional conformal field theories via the AdS/CFT correspondence. Our emphasis is on deriving refined versions of black hole partition functions, that include the effect of higher derivative terms in the spacetime action as well as non-perturbative effects. We include background material on gravity in AdS_3, in the context of holographic renormalization.
description: 55 pages. Lectures presented at the Winter School on the Attractor Mechanism (Frascati, March 20-24, 2006). v2: references added
Επίδραση της συμπύκνωσης σε φυσικές και βιολογικές ιδιότητες τριών πηλωδών εδαφών αμπελώνων
Creators: name: Κοζαΐτη, Μαρκέλα Χρήστου
Publisher: name: Aristotle University of Thessaloniki
Year: 2019
Subjects: Συμπύκνωση
Αμπελώνας
Υφή εδάφους
Compaction
Vineyard
Soil texture

description: Σκοπός της παρούσας διατριβής ήταν η μελέτη της επίδρασης της συμπύκνωσης που προκαλείται από το βάρος και τον αριθμό διελεύσεων των καλλιεργητικών οχημάτων, σε φυσικές και βιολογικές ιδιότητες του επιφανειακού και υπο-επιφανειακού εδάφους πηλωδών αμπελώνων. Στην ευρύτερη περιοχή Αμυνταίου Φλωρίνης επιλέχθηκαν τρεις αμπελώνες που διέφεραν ως προς την υφή του εδάφους, Εξετάσαμε δομικές, υδραυλικές, μηχανικές και βιολογικές ιδιότητες του εδάφους σε συμπιεσμένα (ίχνος τροχού στους διαδρόμους διέλευσης των καλλιεργητικών οχημάτων) και ασυμπίεστα (επάνω στη σειρά φύτευσης των πρέμνων) δείγματα. Για κάθε αμπελώνα έγινε συγκριτική μελέτη των μεταβολών των υπό μελέτη ιδιοτήτων σε δύο χρονικές στιγμές εντός μίας καλλιεργητικής περιόδου, που διέφεραν ως προς τον αριθμό των διελεύσεων των οχημάτων. Η υφή του εδάφους απετέλεσε ακόμα μία παράμετρο έρευνας. Τα αποτελέσματα έδειξαν ότι η συμπύκνωση του εδάφους που προκλήθηκε από την κυκλοφορία των οχημάτων στους αμπελώνες είναι εντονότερη την άνοιξη. Η υφή του εδάφους καθόρισε την επίδραση και την έκταση της συμπύκνωσης του εδάφους στις περισσότερες φυσικές, υδρολογικές και μηχανικές ιδιότητες. Τα λεπτόκοκκα εδά-φη ήταν περισσότερο ευάλωτα στην κυκλοφορία των οχημάτων από την αρχή της καλλιεργητικής περιόδου, ενώ απαιτήθηκαν περισσότερες διελεύσεις για να επηρεά-σουν τις ιδιότητες του αδρόκοκκου εδάφους
description: The aim of the present thesis was to study the effect of compaction caused by the weight and number of passages of vehicles on the natural and biological properties of the surface and sub-surface soil of the vineyards. In the widen area of Amyntaion in Florina (Greece), three vineyards with different soil texture were selected (SiClL, ClL, L). We examined the structural, hydraulic, mechanical and biological properties of the soil in compacted (on the trace of the wheel within the planting rows) and uncompressed (on the planting rows) samples. For each vineyard a comparative study of the changes in the properties studied was carried out at two time intervals within a cultivation period, which varied in the number of vehicle passes. The texture of the soil was still a research parameter. The results showed that, soil compaction caused by vehicle circulation in vineyards, was pronounced in spring. Soil texture determined the effect and extent of soil compaction on the most of the physical, hydrological and mechanical properties. Fine textured soils were vulnerable to vehicle circulation from the beginning of the cultivation period while more passages were demanded to affect soil properties in the presence of increased sand percentage
A Monte Carlo sample size study: how many countries are needed for accurate multilevel SEM?
Creators: name: Meuleman, Bart
name: Billiet, Jaak
Publisher: name: European Survey Research Association
Year: 2009
Subjects: multilevel SEM, sample size, Monte Carlo study, cross-national research

description: Recently, there has been growing scientific interest for cross-national survey research. Various scholars have used multilevel techniques to link individual characteristics to aspects of the national context. At first sight, multilevel SEM seems to be a promising tool for this purpose, as it integrates multilevel modeling within a latent variable framework. However, due to the fact that the number of countries in most international surveys does not exceed 30, the application of multilevel SEM in cross-national research is problematic.

Taking European Social Survey (ESS) data as a point of departure, this paper uses Monte Carlo studies to assess the estimation accuracy of multilevel SEM with small group sample sizes. The results indicate that a group sample size of 20 - a situation common in cross-national research - does not guarantee accurate estimation at all. Unacceptable amounts of parameter and standard error bias are present for the between-level estimates. Unless the standardized effect is very large (0.75), statistical power for detecting a significant between-level structural effect is seriously lacking. Required group sample sizes depend strongly on the specific interests of the researcher, the expected effect sizes and the complexity of the model. If the between-level model is relatively simple and one is merely interested in the between-level factor structure, a group sample size of 40 could be sufficient. To detect large (>0.50) structural effects at the between level, at least 60 groups are required. To have an acceptable probability of detecting smaller effects, more than 100 groups are needed. These guidelines are shown to be quite robust for varying cluster sizes and intra-class correlations (ICCs).
description: Survey Research Methods, Vol 3, No 1 (2009)
The Luminous and Double-Peaked Type Ic Supernova 2019stc: Evidence for Multiple Energy Sources
Creators: name: Gomez, Sebastian
name: Berger, Edo
name: Hosseinzadeh, Griffin
name: Blanchard, Peter K.
name: Nicholl, Matt
name: Villar, V. Ashley
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: We present optical photometry and spectroscopy of SN\,2019stc (=ZTF19acbonaa), an unusual Type Ic supernova (SN Ic) at a redshift of $z=0.117$. SN\,2019stc exhibits a broad double-peaked light curve, with the first peak having an absolute magnitude of $M_r=-20.0$ mag, and the second peak, about 80 rest-frame days later, $M_r=-19.2$ mag. The total radiated energy is large, $E_{\rm rad}\approx 2.5\times 10^{50}$ erg. Despite its large luminosity, approaching those of Type I superluminous supernovae (SLSNe), SN\,2019stc exhibits a typical SN Ic spectrum, bridging the gap between SLSNe and SNe Ic. The spectra indicate the presence of Fe-peak elements, but modeling of the first light curve peak with radioactive heating alone leads to an unusually high nickel mass fraction of $f_{\rm Ni}\approx 31\%$ ($M_{\rm Ni}\approx 3.2$ M$_\odot$). Instead, if we model the first peak with a combined magnetar spin-down and radioactive heating model we find a better match with $M_{\rm ej}\approx 4$ M$_\odot$, a magnetar spin period of $P_{\rm spin}\approx 7.2$ ms and magnetic field of $B\approx 10^{14}$ G, and $f_{\rm Ni}\lesssim 0.2$ (consistent with SNe Ic). The prominent second peak cannot be naturally accommodated with radioactive heating or magnetar spin-down, but instead can be explained as circumstellar interaction with $\approx 0.7$ $M_\odot$ of hydrogen-free material located $\approx 400$ AU from the progenitor. Including the remnant mass leads to a CO core mass prior to explosion of $\approx 6.5$ M$_\odot$. The host galaxy has a metallicity of $\approx 0.26$ Z$_\odot$, low for SNe Ic but consistent with SLSNe. Overall, we find that SN\,2019stc is a transition object between normal SNe Ic and SLSNe.
description: 14 pages, 13 figures, Accepted to ApJ
Nonresponse in the Recruitment of an Internet Panel Based on Probability Sampling
Creators: name: Hoogendoorn, Adriaan
name: Daalmans, Jacco
Publisher: name: European Survey Research Association
Year: 2009
Subjects: Internet Panel Surveys; Nonresponse Error; Pre-recruited panels; Recruitment process

description: In this paper we study the selectivity in the recruitment of respondents for one of CentERdata's Internet panels (the CentERpanel). This recruitment is based on a probability sample. It involves three stages: participation to a first telephone interview, willing to be re-contacted and final agreement to participate in the Internet panel. By matching data of the recruitment process with registries of Statistics Netherlands we are able to distinguish selectivity with regard to age and income in all stages and with pc-ownership in the latter two stages only. Interestingly, we hardly find any selectivity with key variables on living conditions. Finally we will make some explicit recommendations for the recruitment process.
description: Survey Research Methods, Vol 3, No 2 (2009)
Fingering instabilities of a reactive micellar interface
Creators: name: Podgorski, Thomas
name: Sostarecz, Michael C.
name: Zorman, Sylvain
name: Belmonte, Andrew
Publisher: name: arXiv
Year: 2007
Subjects: subject: Pattern Formation and Solitons (nlin.PS)
subject: Soft Condensed Matter (cond-mat.soft)
subject: FOS: Physical sciences

description: We present an experimental study of the fingering patterns in a Hele-Shaw cell, occurring when a gel-like material forms at the interface between aqueous solutions of a cationic surfactant cetyltrimethylammonium bromide) and an organic salt (salicylic acid), two solutions known to form a highly elastic wormlike micellar fluid when mixed homogeneously. A variety of fingering instabilities are observed, depending on the velocity of the front (the injection rate), and on which fluid is injected into which. We have found a regime of non-confined stationary or wavy fingers for which width selection seems to occur without the presence of bounding walls, unlike the Saffman-Taylor experiment. Qualitatively, some of our observations share common mechanisms with instabilities of cooling lava flows or growing biofilms.
description: 7 pages, 9 figures, submitted to Phys. Rev. E, revised version
Physics-Based Modeling and Predictive Simulation of Powder Bed Fusion Additive Manufacturing Across Length Scales
Creators: name: Meier, Christoph
name: Fuchs, Sebastian L.
name: Much, Nils
name: Nitzler, Jonas
name: Penny, Ryan W.
name: Praegla, Patrick M.
name: Pröll, Sebastian D.
name: Sun, Yushen
name: Weissbach, Reimar
name: Schreter, Magdalena
name: Hodge, Neil E.
name: Hart, A. John
name: Wall, Wolfgang A.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Computational Engineering, Finance, and Science (cs.CE)
subject: FOS: Computer and information sciences

description: Powder bed fusion additive manufacturing (PBFAM) of metals has the potential to enable new paradigms of product design, manufacturing and supply chains while accelerating the realization of new technologies in the medical, aerospace, and other industries. Currently, wider adoption of PBFAM is held back by difficulty in part qualification, high production costs and low production rates, as extensive process tuning, post-processing, and inspection are required before a final part can be produced and deployed. Physics-based modeling and predictive simulation of PBFAM offers the potential to advance fundamental understanding of physical mechanisms that initiate process instabilities and cause defects. In turn, these insights can help link process and feedstock parameters with resulting part and material properties, thereby predicting optimal processing conditions and inspiring the development of improved processing hardware, strategies and materials. This work presents recent developments of our research team in the modeling of metal PBFAM processes spanning length scales, namely mesoscale powder modeling, mesoscale melt pool modeling, macroscale thermo-solid-mechanical modeling and microstructure modeling. Ongoing work in experimental validation of these models is also summarized. In conclusion, we discuss the interplay of these individual submodels within an integrated overall modeling approach, along with future research directions.
The Mobile-only Population in Portugal and Its Impact in a Dual Frame Telephone Survey
Creators: name: Vicente, Paula
name: Reis, Elizabeth
Publisher: name: European Survey Research Association
Year: 2009
Subjects: telephone survey methodology; mobile phone surveys; mobile-phone only households; noncoverage rate

description: In 2007 the percentage of mobile-only households in Portugal reached 36%; this is one of the highest levels in EU27 countries according to the EU E-Communications Households Survey. To assess the extent and nature of the potential bias in fixed phone surveys created by the absence of mobile-only households, a dual frame survey was conducted in which both fixed phones and mobile phones were used to collect data. There are significant differences between fixed phone respondents and mobile-only respondents in several demographic variables; however, we find that merging the fixed phone and the mobile-only sample produces general population estimates on substantive variables that are not significantly different from those obtained with the fixed phone sample alone.
description: Survey Research Methods, Vol 3, No 2 (2009)
Do we have to combine Values in the Schwartz' Human Values Scale? A Comment on the Davidov Studies
Creators: name: Knoppen, Desiree
name: Saris, Willem
Publisher: name: European Survey Research Association
Year: 2009
Subjects: Schwartz Human Values scale, ESS, discriminant validity, factor model, misspecifications

description: This paper addresses the question if it is meaningful to group basic values from the values model of Schwartz, which is a vital component of the European Social Survey (ESS), and presents an alternative approach. The suggestion to group values is raised in several studies led by Eldad Davidov, which more precisely conclude that only four of the original ten values can be studied as such (Hedonism, Stimulation, Self-direction, and Security), whereas the remaining six values have to be grouped in three pairs in order to solve the problem of a lack of discriminant validity. This paper indicates that the grouping was necessary because of the choice strategy of items for the ESS. The items chosen for the different values are chosen in such a way that the correlation within the value is relatively low and sometimes the correlations with items of other values is higher. We show this in three steps: the first one based on a German-study, looking for the correlation between the values in the original Portrait Values Questionnaire (PVQ). Secondly, the ESS selection from this wider set of items is used to show that this choice leads to much higher correlations between the values. Thirdly, an analysis with an alternative choice from the same PVQ set of items is done to show that this high correlation is not necessary. In this way we show that the high correlation between the values in the ESS is due to the selection of the items in the ESS and is not intrinsic to the values studied.
description: Survey Research Methods, Vol 3, No 2 (2009)
Presupposition in Political Discourse: The Case of Hilary Clinton versus Donald Trump in 2016 United States Presidential Debates
Creators: name: Χαμογεώργου, Ελένη Νικολάου
Publisher: name: Aristotle University of Thessaloniki
Year: 2019
Subjects: Η προϋπόθεση στον πολιτικό λόγο
Κριτική ανάλυση λόγου
Πολιτική
Presupposition in Political Discourse
Critical discourse analysis (CDA)
Politics

description: Politicians usually employ the art of rhetoric in order to gain people’s support and persuade them to vote for them. One powerful tool of persuasion is presupposition and I intend to explore how politicians exploit this particular device. Presupposition is considered to be a skillful tool by which people are able to imply meanings without stating them clearly, or present things taken for granted, even if these things simply resemble their ideology and may be questionable (Machin & Mayr; 2012). The focus of the survey is the use of presupposition generally in political speeches, since politics is considered to be a contest for power in order to gain people’s support and vote. Thus, language plays a vital role in it, and since presupposition can be thought of as a useful tool in order to mold people’s ideology, it could not be avoided in political debates. More specifically, this particular paper is based on the political speeches of Hilary Clinton and Donald Trump during the three presidential debates taken place on September 26th 2016, October 9th 2016 and October 19th 2016. By examining how presupposition is applied in political discourse, I expect to be able to illustrate that presupposition is indeed extensively used in politics, provide the way this happens through a critical discourse analysis (CDA) and outline the reasons why presupposition is essential in political speeches.
description: Έχει παρατηρηθεί ότι οι πολιτικοί χρησιμοποιούν τη μέθοδο της πειθούς ώστε να κερδίσουν την εμπιστοσύνη και την ψήφο του εκλογικού σώματος. Ένα ισχυρό μέσο πειθούς θεωρείται η «προϋπόθεση», η οποία έχει χαρακτηριστεί ως το φαινόμενο το οποίο επιτρέπει στον/ην ομιλητή/-τρια να υπονοεί κάτι άλλο από αυτό που λέει μέσω των λέξεων και φράσεων που χρησιμοποιεί. Ο στόχος της εργασίας είναι να καταδείξει τον τρόπο με τον οποίο το φαινόμενο της προϋπόθεσης χρησιμοποιείται από τα πολιτικά πρόσωπα στις προεκλογικές τους δηλώσεις με σκοπό να πείσουν για την αξιοπιστία τους. Πιο συγκεκριμένα, στη συγκεκριμένη διπλωματική εργασία εξετάζεται η χρήση του φαινομένου της προϋπόθεσης κατά τη διάρκεια των πολιτικών τηλεμαχιών μεταξύ της Χίλαρυ Κλίντον και του Ντόναλντ Τραμπ στην Αμερική το 2016.
High energy properties of PKS 1830-211
Creators: name: Zhang, Shu
name: Chen, Yu-peng
name: Collmar, Werner
name: Foschini, Luigi
name: Li, Ti-Pei
name: Torres, Diego F.
name: Wang, Jian-Min
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We report on an analysis of X- and $γ$-ray observations of PKS 1830-211, based on the long-term campaigns carried out by \emph{INTEGRAL} and COMPTEL. The \emph{INTEGRAL} data currently available present a $33σ$ significance detection in the 20-100 keV band, while the COMPTEL 6-years data provide a $5.2σ$ significance detection in the 1-3 MeV energy band. At hard X-rays, \emph{INTEGRAL} and supplementary \emph{SWIFT} observations show flux variability on timescales of months. At $γ$-rays, the source shows persistent emission over years. The hard X-ray spectrum is well represented by a power-law model, with $Γ\sim 1.3$ in the 20-250 keV band. This photon index is well consistent with the previous report of $Γ\sim 1.3$ obtained at $E > 3.5$ keV from the best fit of \emph{XMM-Newton} data with a broken power law model. The joint \emph{XMM-Newton}/\emph{INTEGRAL} spectrum presented here is then fit with a broken power-law model and the parameters are refined compared to the previous. The results show the photon index changes from $\sim 1.0$ to $\sim 1.3$ at a break energy $\sim 4$ keV. At MeV energies, the spectrum softens to $Γ\sim 2.2$. These results, together with the EGRET measurement at $E \ge 100$ MeV, constitute a broad-band spectrum containing the peak of the power output at MeV energies, similar to most high-luminosity $γ$-ray blazars. The measured spectral characterstics are then discussed in the framework of the gravitational lens effects.
description: accepted for ApJ
Relating Question Type to Panel Conditioning: Comparing Trained and Fresh Respondents
Creators: name: Toepoel, Vera
name: Das, Marcel
name: Van Soest, Arthur
Publisher: name: European Survey Research Association
Year: 2009
Subjects: panel conditioning; re-interviewing; survey design; panel surveys; trained respondents

description: Panel conditioning arises if respondents are influenced by participation in previous surveys, such that their answers differ from the answers of individuals who are interviewed for the first time. Having two panels - a trained one and a completely fresh one - created a unique opportunity for analyzing panel conditioning effects. To determine which type of question is sensitive to panel conditioning, 981 trained respondents and 2809 fresh respondents answered nine questions with different question types. The results in this paper show that panel conditioning mainly arises in knowledge questions. Answers to questions on attitudes, actual behavior, or facts were hardly sensitive to panel conditioning. The effect of panel conditioning in knowledge questions was bigger for questions where fewer respondents knew the answer and mainly associated with the number of times a respondent
answered the exact same question before.
description: Survey Research Methods, Vol 3, No 2 (2009)
Elicitation of spatial expressions
Creators: name: Parker, Verdena
name: Campbell, Amy
name: Spence, Justin
Publisher: name: California Language Archive, University of California, Berkeley
Year: 2021
Subjects: subject: hup

description: Audio file VP-190408-08: Elicitation of spatial expressions using the "BowPed" topology stimulus pictures (#13-24). Reference: Bowerman, Melissa & Eric Pederson. 1992. Topological relations picture series. In Stephen C. Levinson (ed.), Space stimuli kit 1.2: November 1992, 51. Nijmegen: Max Planck Institute for Psycholinguistics.
Filtration behaviour of non-woven geotextiles in the gradient ration test
Creators: name: Shi, Yucheng
Publisher: name: University of British Columbia
Year: 2008

description: A series of tests was performed on four uniform soils, which have a D85 from 70 Am, with four nonwoven geotextiles, which have a filtration opening size (FOS) from 60 Am to150 Am. No observations of impending clogging were made, however piping occurred in some tests. A ratio of FOS/D85 < 1.5 has been found to be appropriate effective retention of soils without significant piping. A series of tests was also performed on broadly graded soils, which have a D85 from 57 m to 1400 m and a silt content from 3% to 90%, with one geotextile. Gradient ratio values grater than one were observed, which imply the soil-geotextile composite permeability was less than that of the soil alone. This is attributed to some minor clogging of the geotextile. Soil retention criteria are performed, based on geotextile. Soil retention criteria are proposed based on the experimental results, in termsD15 and D50 of the soil and the D5of which is that of the fraction less than the FOS of the geotextile. Tests performed for more than 100 hours show both the gradient ratio and soil permeability are constant at each imposed hydraulic gradient, and it is concluded that a test duration of 24 hours at each gradient is adequate to characterize soil-geotextile performance. Finally, a comprehensive relationship is established that unifies observations of water head distribution, gradient ratio, permeability of the soil and permeability of the soil-geotextile composite. The unified relationship leads to the identification of three zones that describe the distribution of water head in a gradient ratio test.
Supersymmetric Solitons and How They Help Us Understand Non-Abelian Gauge Theories
Creators: name: Shifman, M.
name: Yung, A.
Publisher: name: arXiv
Year: 2007
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: In the last decade it became clear that methods and techniques based on supersymmetry provide deep insights in quantum chromodynamics and other supersymmetric and non-supersymmetric gauge theories at strong coupling. In this review we summarize major advances in the critical (Bogomol'nyi-Prasad-Sommerfeld-saturated, BPS for short) solitons in supersymmetric theories and their implications for understanding basic dynamical regularities of non-supersymmetric theories. After a brief introduction in the theory of critical solitons (including a historical introduction) we focus on three topics: (i) non-Abelian strings in N=2 and confined monopoles; (ii) reducing the level of supersymmetry; and (iii) domain walls as D brane prototypes.
description: 239 pages, 27 figures. A part of this review will be published in Rev. Mod. Phys. Comments and suggestions welcome
Ο Ιερός Ναός Αναλήψεως Θεσσαλονίκης. Ιστορική έρευνα με βάση το αρχειακό υλικό του ναού και του Ιστορικού Αρχείου της Ιεράς Μητροπόλεως Θεσσαλονίκης
Creators: name: Μπαλτάς, Γεώργιος Ηλία
Publisher: name: Aristotle University of Thessaloniki
Year: 2019
Subjects: Ιερός Ναός Αναλήψεως
Ανάληψη
Συνοικία των Πύργων
Χορωδία
Holy Church of the Ascensio
Ascension
Area of the Castles
Choir

description: Η ιστορία του Ιερού Ναού Αναλήψεως του Κυρίου ξεκινά το 1894, στην συνοικία των «Πύργων» ή «Εξοχών», στην πόλη της Θεσσαλονίκης. Τότε τέθηκε ο θεμέλιος λίθος του ναού. Η ανέγερσή του, αποσκοπούσε στην κάλυψη των θρησκευτικών αναγκών των χριστιανών, στην περιοχή της πόλης εκτός των ανατολικών τειχών (έξω από τα ανατολικά τείχη). Στις 12 Μαΐου 1919 πραγματοποιήθηκαν τα επίσημα εγκαίνια του ναού. Η παρούσα εργασία, εξετάζει την ιστορία του ναού, τα στελέχη που υπηρέτησαν και υπηρετούν μέχρι σήμερα σε αυτόν και την ενοριακή του ζωή. Περιγράφονται μεταξύ άλλων, οι επεκτάσεις που έγιναν στο ναό και οι χώροι του. Επίσης γίνεται λόγος για τη λειτουργία του ενοριακού πνευματικού κέντρου, της ενοριακής κατασκήνωσης και της ενοριακής χορωδίας. Τέλος, αναφέρεται και το φιλανθρωπικό έργο του ναού
description: The story of the Holy Church of the Ascension of Jesus Christ dates back in 1894, in the area of the "castles" or "countrysides" in the sity of Thessaloniki. It was then that the erection of the Church started. Its erection meant to cover the religious needs of the Christians who lived outside the eastern walls. On the 12 May 1919, there was the inauguration of the Church. This project aims to examine the story of the Holy Church of the Ascension of the Jesus Christ as well as the people who have served it and the Christian life of the area all these years. Among others in focuses on expansions which took place inside and outside the Church. In addition, we refer to the functioning of the Church cultural centre, campsite and choir. Finally, we refer to the philanthropic work of the Church
Stochastic derivatives for fractional diffusions
Creators: name: Darses, Sébastien
name: Nourdin, Ivan
Publisher: name: arXiv
Year: 2006
Subjects: subject: Probability (math.PR)
subject: FOS: Mathematics
subject: 60G07, 60G15 (Primary); 60G17, 60H07 (Secondary)

description: In this paper, we introduce some fundamental notions related to the so-called stochastic derivatives with respect to a given $σ$-field $\mathcal{Q}$. In our framework, we recall well-known results about Markov--Wiener diffusions. We then focus mainly on the case where $X$ is a fractional diffusion and where $\mathcal{Q}$ is the past, the future or the present of $X$. We treat some crucial examples and our main result is the existence of stochastic derivatives with respect to the present of $X$ when $X$ solves a stochastic differential equation driven by a fractional Brownian motion with Hurst index $H>1/2$. We give explicit formulas.
description: Published in at http://dx.doi.org/10.1214/009117906000001169 the Annals of Probability (http://www.imstat.org/aop/) by the Institute of Mathematical Statistics (http://www.imstat.org)
Relativistic Hydrodynamic Flows Using Spatial and Temporal Adaptive Structured Mesh Refinement
Creators: name: Wang, Peng
name: Abel, Tom
name: Zhang, Weiqun
Publisher: name: arXiv
Year: 2007
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: Astrophysical relativistic flow problems require high resolution three-dimensional numerical simulations. In this paper, we describe a new parallel three-dimensional code for simulations of special relativistic hydrodynamics (SRHD) using both spatially and temporally structured adaptive mesh refinement (AMR). We used the method of lines to discretize the SRHD equations spatially and a total variation diminishing (TVD) Runge-Kutta scheme for time integration. For spatial reconstruction, we have implemented piecewise linear method (PLM), piecewise parabolic method (PPM), third order convex essentially non-oscillatory (CENO) and third and fifth order weighted essentially non-oscillatory (WENO) schemes. Flux is computed using either direct flux reconstruction or approximate Riemann solvers including HLL, modified Marquina flux, local Lax-Friedrichs flux formulas and HLLC. The AMR part of the code is built on top of the cosmological Eulerian AMR code {\sl enzo}. We discuss the coupling of the AMR framework with the relativistic solvers. Via various test problems, we emphasize the importance of resolution studies in relativistic flow simulations because extremely high resolution is required especially when shear flows are present in the problem. We also present the results of two 3d simulations of astrophysical jets: AGN jets and GRB jets. Resolution study of those two cases further highlights the need of high resolutions to calculate accurately relativistic flow problems.
description: 14 pages, 23 figures. A section on 3D GRB jet simulation added. Accepted by ApJS
Elicitation of reciprocal constructions
Creators: name: Parker, Verdena
name: Campbell, Amy
name: Spence, Justin
Publisher: name: California Language Archive, University of California, Berkeley
Year: 2021
Subjects: subject: hup

description: Audio file VP-190408-07: Elicitation of reciprocal constructions based on video clips produced by the Max Planck Institute for Psycholinguistics. Reference: Evans, N., Levinson, S. C., Enfield, N. J., Gaby, A., & Majid, A. (2004). Reciprocal constructions and situation type. In A. Majid (Ed.), Field Manual Volume 9 (pp. 25-30). Nijmegen: Max Planck Institute for Psycholinguistics. doi:10.17617/2.506955.
Search for the Standard Model Higgs Boson in the ZH --> neutrino-neutrino-b-b channel
Creators: name: D0 Collaboration
name: Abazov, V.
Publisher: name: arXiv
Year: 2006
Subjects: subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: We report a search for the standard model (SM) Higgs boson based on data collected by the D0 experiment at the Fermilab Tevatron Collider, corresponding to an integrated luminosity of 260 pb^-1. We study events with missing transverse energy and two acoplanar b-jets, which provide sensitivity to the ZH production cross section in the neutrino-neutrino-b-b channel and to WH production, when the lepton from the W -> lepton+neutrino decay is undetected. The data are consistent with the SM background expectation, and we set 95% C.L. upper limits on sigma(p p-bar -> ZH/WH) x B(H -> b b-bar) from 3.4/8.3 to 2.5/6.3 pb, for Higgs masses between 105 and 135 GeV.
description: submitted to Phys. Rev. Letters
Evolution of the X-ray Emission of Radio-Quiet Quasars
Creators: name: Kelly, Brandon C.
name: Bechtold, Jill
name: Siemiginowska, Aneta
name: Aldcroft, Tom
name: Sobolewska, Malgorzata
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We report new Chandra observations of seven optically faint, z \sim 4 radio-quiet quasars. We have combined these new observations with previous Chandra observations of radio-quiet quasars to create a sample of 174 sources. These sources have 0.1 < z < 4.7, and 10^{44} ergs s^{-1} < nu L_{nu} (2500 Å) < 10^{48} ergs s^{-1}. The X-ray detection fraction is 90%. We find that the X-ray loudness of radio-quiet quasars decreases with UV luminosity and increases with redshift. The model that is best supported by the data has a linear dependence of optical-to-X-ray ratio, alpha_{ox}, on cosmic time, and a quadratic dependence of alpha_{ox} on log L_{UV}, where alpha_{ox} becomes X-ray quiet more rapidly at higher log L_{UV}. We find no significant evidence for a relationship between the X-ray photon index, Gamma_X, and the UV luminosity, and we find marginally significant evidence that the X-ray continuum flattens with increasing z (2 sigma). The Gamma_X-z anti-correlation may be the result of X-ray spectral curvature, redshifting of a Compton reflection component into the observed Chandra band, and/or redshifting of a soft excess out of the observed Chandra band. Using the results for Gamma_X, we show that the alpha_{ox}-z relationship is unlikely to be a spurious result caused by redshifting of the observable X-ray spectral region. A correlation between alpha_{ox} and z implies evolution of the accretion process. We present a qualitative comparison of these new results with models for accretion disk emission.
description: Accepted by ApJ, 48 pages, 10 figures, 5 tables
Μεταβίβαση επιχείρησης όταν ο μεταβιβάζων εργοδότης βρίσκεται σε κατάσταση αφερεγγυότητας
Creators: name: Ντούκα, Φρειδερίκη Δημητρίου
Publisher: name: Aristotle University of Thessaloniki
Year: 2019
Subjects: μεταβίβαση επιχείρησης
κατάσταση αφερεγγυότητας
εξυγίανση και ειδική διαχείριση
transfer of an undertaking
state of insolvency
rehabilitation procedure of Insolvency Code and the special receivership procedure

description: Η διπλωματική εργασία ασχολείται με την μεταβίβαση επιχείρησης και τις συνέπειες αυτής στις εργασιακές σχέσεις όταν ο εργοδότης βρίσκεται σε κατάσταση αφερεγγυότητας. Η βασική αρχή του Π.Δ. 178/2002 συνίσταται στο ότι όλα τα υφιστάμενα δικαιώματα και υποχρεώσεις που έχει ο μεταβιβάζων από σύμβαση ή σχέση εργασίας μεταβιβάζονται στο διάδοχο. Ωστόσο η προστασία που προβλέπεται από τα άρθρα 4 και 5 του Π.Δ. 178/2002 δεν εφαρμόζεται στη μεταβίβαση επιχειρήσεων που πραγματοποιείται όταν ο μεταβιβάζων υπόκειται σε διαδικασία πτωχεύσεως ή σε οποιαδήποτε άλλη ανάλογη διαδικασία με σκοπό την εκκαθάριση των περιουσιακών στοιχείων του μεταβιβάζοντος, η οποία τελεί υπό την εποπτεία δημόσιας αρχής. Παρόλο που γίνεται σαφές ότι όταν η μεταβίβαση της επιχείρησης πραγματοποιείται στο πλαίσιο της διαδικασίας πτώχευσης, δεν εφαρμόζονται οι προστατευτικές διατάξεις του Π.Δ. 178/2002, προκύπτει πρόβλημα όταν η μεταβίβαση της επιχείρησης πραγματοποιείται στο πλαίσιο προπτωχευτικών διαδικασιών, όπως αυτές της εξυγίανσης και της ειδικής διαχείρισης
description: The thesis deals with the transfer of an undertaking and its consequences on employment relationships when the transferer is in a state of insolvency. Τhe basic principle of the Presidential Decree 178/2002 consists in that all existing transferor’s rights and obligations, due to a work contract or relation, are transferred to his successor…. However the protection scheme under Articles 4 and 5 of Presidential Decree 178/2002 does not apply to transfers of undertakings where the transferor is the subject of bankruptcy proceedings or any analogous insolvency proceedings which have been instituted with a view to the liquidation of the assets of the transferor and are under the supervision of a public authority. While it becomes clear that when the transfer of the enterprise takes place as part of the bankruptcy proceedure, there is no application of the protective provisions of Presidential Decree 178/2002, a problem arises when the transfer of the enterprise takes place as part of ιnsolvency procedures, such us the rehabilitation procedure of Insolvency Code and the special receivership procedure of Law 4307/2014
Local Quantum Dot Tuning on Photonic Crystal Chips
Creators: name: Faraon, Andrei
name: Englund, Dirk
name: Fushman, Ilya
name: Stoltz, Nick
name: Petroff, Pierre
name: Vuckovic, Jelena
Publisher: name: arXiv
Year: 2007
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Quantum networks based on InGaAs quantum dots embedded in photonic crystal devices rely on QDs being in resonance with each other and with the cavities they are embedded in. We developed a new technique based on temperature tuning to spectrally align different quantum dots located on the same chip. The technique allows for up to 1.8nm reversible on-chip quantum dot tuning.
A Study on the Structure Functions and the radius of the Nucleons
Creators: name: Bhattacharya, A.
name: sagari, A.
name: Chakrabarti, B.
name: Mani, S.
Publisher: name: arXiv
Year: 2008
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We have investigated the properties of the structure functions of the nucleons in the context of the statistical model using only the radius parameter of the respective nucleons. The radius of the neutron has been estimated and is found to be 0.8fm. It is interesting to observe that the proton radius 0.865fm which exactly equals to the most accepted charge radius of the proton and which in turn characterizes proton as a meso object, yields reasonable results for the structure function and its properties. GT sum rule has been investigated with some interesting conclusions.
description: 10 pages, 4 figures