cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Achievement in CALL, Non-CALL and Blended Learning Environments
Creators: name: Κάσσου, Μαρία-Σταματία Αθανασίου
Publisher: name: Aristotle University of Thessaloniki
Year: 2017
Subjects: Εκμάθηση με χρήση υπολογιστή
Εκμάθηση χωρίς χρήση υπολογιστή
Αξιολόγηση και Επίδοση
CALL
Non-CALL
3. Assessment and Achievement

description: Η εργασία με τίτλο Επίδοση σε Περιβάλλον με Χρήση Τεχνολογίας Υπολογιστή, Χωρίς Χρήση Τεχνολογίας Υπολογιστή και σε Μεικτό Περιβάλλον βασίζεται σε βιβλιογραφική έρευνα. Ξεκινά με μία ιστορική ανασκόπηση της χρήσης ηλεκτρονικού υπολογιστή για την εκμάθηση και διδασκαλία ξένων γλωσσών. Αναφέρεται εκτενώς στα πλεονεκτήματα και τα μειονεκτήματα της χρήσης υπολογιστή για την εκμάθηση και διδασκαλία ξένων γλωσσών, της παντελούς έλλειψης χρήσης Η/Υ και του μεικτού περιβάλλοντος εκμάθησης ξένων γλωσσών, στο οποίο εφαρμόζεται η χρήση ηλεκτρονικού υπολογιστή και η χρήση του παραδοσιακού μοντέλου εκμάθησης και διδασκαλίας ξένων γλωσσών. Έπειτα, αναφέρονται διάφορες εμπειρικές έρευνες άλλων ερευνητών που ως επί των πλείστων αποδεικνύουν ότι η χρήση υπολογιστή ευνοεί και βελτιώνει την επίδοση των μαθητών στη γραμματική, το λεξιλόγιο, την παραγωγή γραπτού λόγου, την κατανόηση γραπτού λόγου, την παραγωγή προφορικού λόγου και την κατανόηση προφορικού λόγου
description: The dissertation entitled Achievement in CALL, Non-CALL and Blended Learning Environments is based on bibliographical research. It starts with a historical outlook of the use of computers in teaching and learning foreign languages. It refers analytically to the advantages and disadvantages of the use of computers in teaching and learning foreign languages, the absolute lack of the use of computers and the blended learning approach, which applies both the use of computers and the use of traditional teaching and learning of foreign languages. Then, empirical surveys of other researchers are mentioned, which they prove that the use of computers ameliorates students’ achievement levels in grammar, vocabulary, writing, reading comprehension, speaking and listening comprehension
Chiral Phase Transition from String Theory
Creators: name: Parnachev, Andrei
name: Sahakyan, David A.
Publisher: name: arXiv
Year: 2006
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: The low energy dynamics of a certain D-brane configuration in string theory is described at weak t'Hooft coupling by a non-local version of the Nambu-Jona-Lasinio model. We study this system at finite temperature and strong t'Hooft coupling, using the string theory dual. We show that for sufficiently low temperatures chiral symmetry is broken, while for temperatures larger then the critical value, it gets restored. We compute the latent heat and observe that the phase transition is of the first order.
description: 10 pages, 2 figures; harvmac v2: PRL version
Magnetic properties of the quasi two-dimensional centered honeycomb antiferromagnet GdInO$_3$
Creators: name: Yin, Xunqing
name: Li, Yunlong
name: Wang, Guohua
name: Hu, Jiayuan
name: Xu, Chenhang
name: Lu, Qi
name: Zhong, Yunlei
name: Zhao, Jiawang
name: Zhao, Xiang
name: Zhang, Yuanlei
name: Cao, Yiming
name: Xu, Kun
name: Li, Zhe
name: Kamiya, Yoshitomo
name: Hong, Guo
name: Qian, Dong
Publisher: name: arXiv
Year: 2021
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: The crystal structure and magnetic property of the single crystalline hexagonal rare-earth indium oxides GdInO$_3$ have been studied by combing experiments and model calculations. The two inequivalent Gd$^{3+}$ ions form the centered honeycomb lattice, which consists of honeycomb and triangular sublattices. The dc magnetic susceptibility and specific heat measurements suggest two antiferromagnetic phase transitions at $T_\textrm{N1}$ = 2.3 K and $T_\textrm{N2}$ = 1.02 K. An inflection point is observed in the isothermal magnetization curve, which implies an up-up-down phase with a 1/3 magnetization plateau. We also observe a large magnetic entropy change originated from the magnetic frustration in GdInO$_3$. By considering a classical spin Hamiltonian, we establish the ground state phase diagram, which suggests that GdInO$_3$ has a weak easy-axis anisotropy and is close to the equilateral triangular-lattice system. The theoretical ground-state phase diagram may be used as a reference in NMR, ESR, or $μ$SR experiments in future.
A Statistical Method for Estimating Luminosity Functions using Truncated Data
Creators: name: Schafer, Chad M.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: The observational limitations of astronomical surveys lead to significant statistical inference challenges. One such challenge is the estimation of luminosity functions given redshift $z$ and absolute magnitude $M$ measurements from an irregularly truncated sample of objects. This is a bivariate density estimation problem; we develop here a statistically rigorous method which (1) does not assume a strict parametric form for the bivariate density; (2) does not assume independence between redshift and absolute magnitude (and hence allows evolution of the luminosity function with redshift); (3) does not require dividing the data into arbitrary bins; and (4) naturally incorporates a varying selection function. We accomplish this by decomposing the bivariate density into nonparametric and parametric portions. There is a simple way of estimating the integrated mean squared error of the estimator; smoothing parameters are selected to minimize this quantity. Results are presented from the analysis of a sample of quasars.
description: 30 pages, 9 figures, Accepted for publication in ApJ
Multi-task fully convolutional network for tree species mapping in dense forests using small training hyperspectral data
Creators: name: La Rosa, Laura Elena Cué
name: Sothe, Camile
name: Feitosa, Raul Queiroz
name: de Almeida, Cláudia Maria
name: Schimalski, Marcos Benedito
name: Oliveira, Dario Augusto Borges
Publisher: name: arXiv
Year: 2021
Subjects: subject: Computer Vision and Pattern Recognition (cs.CV)
subject: FOS: Computer and information sciences

description: This work proposes a multi-task fully convolutional architecture for tree species mapping in dense forests from sparse and scarce polygon-level annotations using hyperspectral UAV-borne data. Our model implements a partial loss function that enables dense tree semantic labeling outcomes from non-dense training samples, and a distance regression complementary task that enforces tree crown boundary constraints and substantially improves the model performance. Our multi-task architecture uses a shared backbone network that learns common representations for both tasks and two task-specific decoders, one for the semantic segmentation output and one for the distance map regression. We report that introducing the complementary task boosts the semantic segmentation performance compared to the single-task counterpart in up to 11% reaching an average user's accuracy of 88.63% and an average producer's accuracy of 88.59%, achieving state-of-art performance for tree species classification in tropical forests.
description: Full version of preprint accepted at ISPRS Journal of Photogrammetry and Remote Sensing
Predicate doubling, relative clauses, restrictive, head syntax, tone spreading, phonetics
Creators: name: Doko, Jeanne
name: Koutouan, Evelyne
name: Jarvis, Rebecca
name: Kapner, Julianne
name: Russell, Katherine
name: Hatch, Lindsay
name: Kouadio, Timothée
Publisher: name: California Language Archive, University of California, Berkeley
Year: 2023
Subjects: subject: ebr

description: Elicitation of nasality in multi-verb constructions, deverbal nominalizations, predicate doubling, tone spreading from verb to object and nominal tone context paradigms. Includes phonetic elicitation for bilabial trills. Video was recorded but not uploaded due to lighting issues in the videos. Elicitation on relative-clause periphery permitted items.
Immigration and secondary mainstream academic communication and instruction : The expressed concerns of Richmond School District
Creators: name: Hebb, Lisa Marguerite
Publisher: name: University of British Columbia
Year: 2009

description: The purpose of this study was to determine the expressed immigrant student academic communication and instruction concerns of Richmond School District (RSD) secondary mainstream educators. A participant-observation (Bruyn, 1966; Denzin, 1970, 1978) research design, including a secondary mainstream educator Likert-type Scale survey (N=36), 13 secondary mainstream educators standardized open-ended interviews, and 20 secondary English as a Second Language (ESL) and 40 secondary mainstream content area one hour classroom observations, was used. The findings of this study can be summarized as follows: 1. Although RSD secondary mainstream educators are aware of the number of immigrant students in their classrooms, their knowledge of the educational and cultural backgrounds of these students is limited. 2. Differences exist between the academic communication and instruction needs of immigrant and mainstream students. 3. Immigrant student language-related difficulties are affecting secondary mainstream communication and instruction in the RSD. 4 . The cultural backgrounds of immigrant students are an issue in the secondary mainstream classroom. 5. Eighty-three percent of the RSD secondary mainstream educators surveyed reported making instructional methods adjustments in their teaching to accommodate the immigrant students in their classrooms. 6. Although two-thirds of the survey sample group felt their current teaching practices were adequate to accommodate all learners, two-thirds also felt they had to make additional instructional methods adjustments to accommodate the immigrant students in their classrooms. 7. Although the presence of immigrant students in the classroom does not make RSD secondary mainstream educators uncomfortable, two-thirds are experiencing academic communication and instruction difficulties with immigrant students because they are unaccustomed to dealing with immigrant students in their classrooms. 8. The three major immigration and academic communication and instruction concerns expressed by the RSD secondary mainstream educators were: (a) immigrant students are being integrated into the secondary mainstream classroom before their English language level is equal to content demands, (b) a lack of communication, or coordination of efforts, or both, between ESL and mainstream teachers, and (c) a district-wide need to acknowledge and respond to the changes immigration is making in the RSD.
Fluctuation Theorems with Retrodiction rather than Reverse Processes
Creators: name: Aw, Clive Cenxin
name: Buscemi, Francesco
name: Scarani, Valerio
Publisher: name: arXiv
Year: 2021
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Irreversibility is usually captured by a comparison between the process that happens and a corresponding "reverse process". In the last decades, this comparison has been extensively studied through fluctuation relations. Here we revisit fluctuation relations from the standpoint, suggested decades ago by Watanabe, that the comparison should involve the prediction and the retrodiction on the unique process, rather than two processes. We identify a necessary and sufficient condition for a retrodictive reading of a fluctuation relation. The retrodictive narrative also brings to the fore the possibility of deriving fluctuation relations based on various statistical divergences, and clarifies some of the traditional assumptions as arising from the choice of a reference prior.
Η Νεολιθική εποχή στη Νότια Πιερία
Creators: name: Τσιανάκα, Αντωνία Χρήστου
Publisher: name: Aristotle University of Thessaloniki
Year: 2017
Subjects: Νεολιθική περίοδος
Νότια Πιερία
Πηγή Αθηνάς
Neolithic period
Southern Pieria
Pigi Athinas

description: Σκοπός της παρούσας μεταπτυχιακής εργασίας είναι η μελέτη της Νεολιθικής περιόδου στη Νότια Πιερία (περιοχή Μακεδονικού Ολύμπου), με δεδομένα που αντλήθηκαν κυρίως από την θέση ‹‹Πηγή Αθηνάς›› στον Πλαταμώνα. Παρουσιάζεται κεραμική από τη Μέση Νεολιθική και επιλεγμένο δείγμα από τη Νεότερη Νεολιθική περίοδο της θέσης, που υποδεικνύει συνεχή χρήση του χώρου. Παράλληλα, με αφορμή της γεωγραφική θέση της ‹‹Πηγής Αθηνάς›› στον άξονα του περάσματος των Τεμπών, γίνεται αναφορά στα περάσματα από τη Θεσσαλία προς τη Μακεδονία, κατά τη Νεολιθική περίοδο. Επιπλέον, επισημαίνονται αρχαιολογικές θέσεις από τη Μακεδονία, η κεραμική των οποίων υποδεικνύει επιρροή από τη Θεσσαλία, μέσω της χρήσης των προαναφερθέντων περασμάτων, με τη μορφή μετακινήσεων ανθρώπων, ιδεών ή αντιλήψεων. Στον ίδιο χώρο εντοπίζονται στιλιστικά παράλληλα της κεραμικής από την Πηγή Αθηνάς, προκειμένου να διαφανούν εν δυνάμει εξωτερικές επιρροές στη θέση.
description: The aim of the present thesis is to study the Neolithic Period in Southern Pieria (region of Macedonian Olympus). The study is mainly focused on the site of ‹‹Pigi Athinas››, at Platamonas. Pottery from the Middle Neolithic period is presented together with a selected sample from the Late Neolithic period of the site that indicates continuous use. In addition, due to the strategic geographic location of ‹‹Pigi Athinas››, short after the passage through Tempi, reference is made to the passages leading from Thessaly to Macedonia in the Neolithic period. Furthermore, other sites in Macedonia are recorded in the study, the pottery of which indicate influences from Thessaly, possibly justified by the use of aforementioned passages in the form of people, ideas or perceptions movements. Finally, at the same area are detected stylistic pottery characteristics of Pigi Athinas, in order to discern possible external influences on the site
Διερεύνηση της σύγκλισης στις τουριστικές αγορές της Ελλάδας
Creators: name: Κάλασιαν, Άνι Σαργκίς
Publisher: name: Aristotle University of Thessaloniki
Year: 2017
Subjects: subject: Τουρισμός
subject: Έλεγχος μοναδιαίας ρίζας
subject: Σύγκλιση
subject: Tourism
subject: FOS: Economics and business
subject: Unit root control
subject: Convergence

description: Η μελέτη αυτή έχει ως σκοπό να διερευνηθεί το ζήτημα της σύγκλισης στην τουριστική αγορά της Ελλάδας με βάση τις τουριστικές αφίξεις από διαφορετικούς προορισμούς. Η περίοδος ανάλυσης καλύπτει το διάστημα 1995-2015. Tο δείγμα περιλαμβάνει 18 χώρες, οι οποίες είναι η Αλβανία, η Αυστραλία, η Αυστρία, το Βέλγιο, η Γαλλία, η Γερμανία, η Δανία, η Ελβετία, το Ηνωμένο Βασίλειο, οι ΗΠΑ, η Ισπανία, η Ιταλία, ο Καναδάς, η Κύπρος, η Ολλανδία, η Ρουμανία, η Ρωσία, η Τσέχικη Δημοκρατία. Αρχικά, εφαρμόστηκαν οι κλασικοί έλεγχοι μοναδιαίας ρίζας, από τους οποίους δεν προέκυψαν ενδείξεις σύγκλισης. Στη συνέχεια, η ανάλυση ολοκληρώθηκε με τον έλεγχο μοναδιαίας ρίζας σε πάνελ των Lee και Strazisich (2004), βάσει του οποίου διαπιστώθηκε ότι, πλην της Ρωσίας, οι υπόλοιπες χώρες παρουσιάζουν ενδείξεις στοχαστικής σύγκλισης, γεγονός που υποδεικνύει ότι οι πολιτικές τουρισμού λειτουργούν για τις συγκεκριμένες αγορές και θα πρέπει να δοθεί έμφαση στις χώρες αυτές ώστε να αποκομίσει η Ελλάδα όλα τα αναπτυξιακά οφέλη. Τέλος, αναφορικά με την περίπτωση της Ρωσίας θα πρέπει η πολιτική τουρισμού να επαναπροσδιοριστεί καθώς δεν είναι αποτελεσματική.
description: This study aims at exploring the issue of convergence in the tourist market of Greece on basis of tourist arrivals from different destinations. The period of this analysis covers the years 1995-2015. The sample includes 18 countries, namely Albania, Australia, Austria, Belgium, France, Germany, Denmark, Switzerland, United Kingdom, USA, Spain, Italy, Canada, Cyprus, Netherlands, Romania, Russia, and Czech Republic. Initially, classical panel unit root tests were applied, which showed no signs of convergence. Subsequently, the analysis was completed with the Lee and Strazisich (2004) panel unit root test, which found that, with the exception of Russia, the other countries showed signs of stochastic convergence, indicating that tourism policies are working for these markets meaning that these countries should be in the center of interest so that Greece may receive all possible developmental benefits. Finally, regarding the case of Russia, tourist policy should be redefined since it seems to be ineffective.
Additional file 1 of A chloroplast-localized pentatricopeptide repeat protein involved in RNA editing and splicing and its effects on chloroplast development in rice
Creators: name: Wang, Yanwei
name: Yang, Zhimin
name: Zhang, Meng
name: Ai, Pengfei
Publisher: name: figshare
Year: 2022
Subjects: subject: Genetics
subject: FOS: Biological sciences

description: Additional file 1: Fig. S1. Mutational analysis of ssa1. Fig. S2. Construction of complementary vectors and detection of chlorophyll content. Fig. S3. Amino acid sequence alignment of the WT and knockout lines ssa1–2/1–9. Fig. S4. Sequence analysis of SSA1. Fig. S5. Sequence alignment of PPR protein with sequence homology to SSA1 in rice. Fig. S6. Phylogenetic tree showing predicted relationships between SSA1 and other closely related species. Fig. S7. Expression analysis of SSA1 in different rice tissues. Fig. S8. Splicing analyses of rice chloroplast transcripts in WT and ssa1 mutant. Fig. S9. RNA editing efficiency of various target sites.
Derivative-Free Multiobjective Trust Region Descent Method Using Radial Basis Function Surrogate Models
Creators: name: Berkemeier, Manuel
name: Peitz, Sebastian
Publisher: name: arXiv
Year: 2021
Subjects: subject: Optimization and Control (math.OC)
subject: Numerical Analysis (math.NA)
subject: FOS: Mathematics
subject: 90C30, 90C56

description: We present a flexible trust region descend algorithm for unconstrained and convexly constrained multiobjective optimization problems. It is targeted at heterogeneous and expensive problems, i.e., problems that have at least one objective function that is computationally expensive. The method is derivative-free in the sense that neither need derivative information be available for the expensive objectives nor are gradients approximated using repeated function evaluations as is the case in finite-difference methods. Instead, a multiobjective trust region approach is used that works similarly to its well-known scalar pendants. Local surrogate models constructed from evaluation data of the true objective functions are employed to compute possible descent directions. In contrast to existing multiobjective trust region algorithms, these surrogates are not polynomial but carefully constructed radial basis function networks. This has the important advantage that the number of data points scales linearly with the parameter space dimension. The local models qualify as fully linear and the corresponding general scalar framework is adapted for problems with multiple objectives. Convergence to Pareto critical points is proven and numerical examples illustrate our findings.
description: 34 pages
Το στερεότυπο της Ανατολής μέσα από την εικονολογία: οι πολιτισμικές αναπαραστάσεις της Αιγύπτου και του Πακιστάν μέσα από τα έργα των Alaa Al-Aswany και Tariq Ali
Creators: name: Γκιβίση, Ελένη Γεωργίου
Publisher: name: Aristotle University of Thessaloniki
Year: 2017
Subjects: Οριενταλισμός
Στερεότυπο
Ταυτότητα
Orientalism
Stereotype
Identity

description: Η παρούσα διατριβή εξετάζει το στερεότυπο της «Ανατολής» μέσα από τα έργα των Alaa Al – Aswany και Tariq Ali. Σκοπός μας ήταν να αναδειχθούν οι δομές των στερεοτύπων που διέπουν τις πολιτισμικές παραστάσεις ενός εκάστοτε συνόλου. Εξετάσαμε τους τρόπους με τους οποίους αναπαρίσταται η πολιτισμική ταυτότητα και χρησιμοποιήσαμε τα μεθοδολογικά εργαλεία του συγκριτολογικού κλάδου της λογοτεχνικής εικονολογίας για να μελετήσουμε πώς απεικονίζεται η ταυτότητα των ηρώων μέσα από την αφηγηματική δομή των έργων. Σε αυτό το πλαίσιο διατρέξαμε τις ιστορικές, πολιτισμικές, ανθρωπολογικές και κοινωνικές συνιστώσες της ταυτότητας και επιχειρήσαμε να εκθέσουμε πως μέσα από τις διεργασίες αφομοίωσής τους και ανάλογα με το αποτέλεσμα αυτής, δομείται ή/και αποδομείται το πολιτισμικό στερεότυπο. Διαπιστώσαμε ότι οι σταθερές στερεοτυπικές δομές της πολιτισμικής αντίληψης μπορούν να επανακαθορισθούν και να εκτεθούν σε νέους κανόνες, εμπειρίες και αξιολογήσεις και έτσι να εγείρουν νέες ερμηνείες των φαινομένων και των θεωριών.
description: This thesis examines the stereotype of the "Orient" through the works of Alaa Al - Aswany and Tariq Ali. Our aim was to highlight the structures of the stereotypes that govern the cultural representations of a given group. We examined the ways in which cultural identity is represented and used the methodological tools of literary imagology, a field of comparative literature’s studies, to investigate how the identity of the characters is illustrated through the narrative structure of the examined works. In this context, we went across the historical, cultural, anthropological and social components of identity and attempted to expose that the cultural stereotype is constructed and/or deconstructed through their assimilation processes, depending on the result of these. We found that the stable stereotypical perception of cultural structures can be redefined and be re-exposed to new rules, experiences and opinions and thus can raise new interpretations of phenomena and theories
Stabilization of charge ordering in La_(1/3)Sr_(2/3)FeO_(3-d) by magnetic exchange
Creators: name: McQueeney, R. J.
name: Ma, J.
name: Chang, S.
name: Yan, J. -Q.
name: Hehlen, M.
name: Trouw, F.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: The magnetic exchange energies in charge ordered La_(1/3)Sr_(2/3)FeO_(3-d) (LSFO) and its parent compound LaFeO_(3) (LFO) have been determined by inelastic neutron scattering. In LSFO, the measured ratio of ferromagnetic exchange between Fe3+ - Fe5+ pairs (J_F) and antiferromagnetic exchange between Fe3+ - Fe3+ pairs (J_AF) fulfills the criterion for charge ordering driven by magnetic interactions (|J_F/J_AF| > 1). The 30% reduction of J_AF as compared to LFO indicates that doped holes are delocalized, and charge ordering occurs without a dominant influence from Coulomb interactions.
description: 18 pages, 4 color figures
Η εικαστική απόδοση των προσωποποιήσεων στην πρωτοβυζαντινή τέχνη
Creators: name: Ευαγγελίδου, Σμαρώ Ευάγγελου
Publisher: name: Aristotle University of Thessaloniki
Year: 2017
Subjects: Προσωποποιήσεις
Ύστερη αρχαιότητα
Πρωτοβυζαντινή τέχνη
Personifications
Early byzantine art
Late antiquity

description: Η συγκεκριμένη μελέτη εξετάζει την εικαστική απόδοση των προσωποποιήσεων στην πρωτοβυζαντινή τέχνη (4ου - 7ου αι. μ.Χ.) μέσα από τα επιδαπέδια ψηφιδωτά του ελλαδικού χώρου. Το πόνημα επιμερίζεται σε δύο μέρη. Στο πρώτο μέρος παρουσιάζεται με αλφαβητική σειρά ο κατάλογος των ανασκαμμένων παραδειγμάτων του ελλαδικού χώρου που διασώζουν ψηφιδωτά δάπεδα στα οποία εικονογραφούνται προσωποποιήσεις. Σε κάθε λήμμα δίνονται αναλυτικές πληροφορίες ταυτότητας, περιγραφής και σχολιασμού του κάθε ψηφιδωτού. Το δεύτερο μέρος διαρθρώνεται σε τέσσερα κεφάλαια κατηγοριοποίησης των προσωποποιημένων εννοιών. Έτσι, σκιαγραφούνται οι αντιλήψεις της πρωτοβυζαντινής περιόδου για το χρόνο (εκφρασμένες μέσα από τις προσωποποιήσεις του ενιαύσιου κύκλου και των μονάδων μέτρησης του χρόνου), για το σύμπαν (βασισμένες στις προσωποποιήσεις του σύμπαντος και των αστρικών σωμάτων, με έμφαση στη χαρτογραφία της εποχής), για τα φυσικά φαινόμενα και το περιβάλλον (ως προσωποποιήσεις των τεσσάρων ανέμων και των επίγειων ποταμών) και για τις αποτροπαϊκές-προστατευτικές δυνάμεις και θεότητες (μέσα από τα αποτροπαϊκά σύμβολα και τις προσωποποιήσεις που ευνοούν την ευημερία, την καλοτυχία και τη γονιμότητα). Η παρούσα εργασία στοχεύει στην ανάλυση ανάλυση των ψηφιδωτών παραλλήλων του ελλαδικού χώρου και στην εξαγωγή συμπερασμάτων σχετικών με τις αντιλήψεις των ανθρώπων, με τον τρόπο εργασίας των εργαστηρίων και τις επιρροές που δεχόταν ο ελληνικός χώρος από τη Δύση και την Ανατολή αλλά και από την ύστερη αρχαιότητα.
description: Τhe dissertation proposes the study of the personifications in the early byzantine mosaic pavements of Greece. Τhe study consists of two parts. Τhe catalogue of the excavated monuments, that preserves mosaic pavements in which personifications are illustrated, is presented in alphabetical order in the first part. In the second part the personifications are categorized by their interpretations in four chapters. Thus, the illustrated personifications express the perceptions of the time, the universe, the environment and the protective deities. In conclusion, this dissertation provides information for the perceptions of people, the labor of the workshops and the influences of East and West in the early byzantine greek domain.
Additional file 2 of A chloroplast-localized pentatricopeptide repeat protein involved in RNA editing and splicing and its effects on chloroplast development in rice
Creators: name: Wang, Yanwei
name: Yang, Zhimin
name: Zhang, Meng
name: Ai, Pengfei
Publisher: name: figshare
Year: 2022
Subjects: subject: Genetics
subject: FOS: Biological sciences

description: Additional file 2: Table S1. Primers used in this study.
Self-consistent quasiparticle model for quark-gluon plasma
Creators: name: Bannur, Vishnu M.
Publisher: name: arXiv
Year: 2006
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: Here we present a self-consistent quasi-particle model for quark-gluon plasma and apply it to explain the non-ideal behaviour seen in lattice simulations. The basic idea, borrowed from electrodynamic plasma, is that the gluons acquire mass as it propagates through plasma due to collective effects and is approximately equal to the plasma frequency. The statistical mechanics and thermodynamics of such a system is studied by treating it as an ideal gas of massive gluons. Since mass or plasma frequency depends on density, which itself is a thermodynamic quantity, the whole problem need to be solved self-consistently.
description: 6 pages, 2 figures, article
A light plasmon mode in the color-flavor-locking phase
Creators: name: Malekzadeh, H.
name: Rischke, Dirk H.
Publisher: name: arXiv
Year: 2006
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We calculate the spectral densities of electric and magnetic gluons at zero temperature in color-superconducting quark matter in the color-flavor-locking (CFL) phase. We find a collective excitation, a plasmon, at energies smaller than two times the gap parameter and momenta smaller than about eight times the gap. The dispersion relation of this mode exhibits a minimum at some nonzero value of momentum, indicating a van Hove singularity.
description: 4 pages, 4 figures, Chosen as one of the best posters in the Conference "Quark Matter 2005", 4th - 9th August 2005, Budapest/Hungary
Σύνθεση και χαρακτηρισμός νανοσύνθετων υλικών με βάση το πολυ(γαλακτικό οξύ) με προηγμένες νανοδομές πυριτίας
Creators: name: Προκοπίου, Λυδία Αχιλλεύς
Publisher: name: Aristotle University of Thessaloniki
Year: 2017
Subjects: Νανοσύνθετα υλικά πολυ(γαλακτικού οξέος)
Νανοσωματίδια πυρογενούς σίλικας
Νανοσωματίδια άμινο-τροποποιημένης σίλικας
Poly(lactic acid) Nanocomposites
Fumed silica nanoparticles
Amino-modified silica nanoparticles

description: Αντικείμενο της παρούσας πτυχιακής εργασίας είναι η μελέτη νανοσύνθετων πολυμερικών υλικών με βάση το πολυ(γαλακτικό οξύ) και η επίδραση των ανόργανων νανοσωματιδίων στις ιδιότητες τους. Για τον σκοπό αυτό, παρασκευάστηκαν και μελετήθηκαν νανοσύνθετα υλικά πολυ(γαλακτικού οξέος) με νανοσωματίδια πυρογενούς SiO2 με μεταβολή του ποσοστού των εγκλεισμάτων και των διεπιφανειακών αλληλεπιδράσεων μήτρας-εγκλείσματος, με τη προσθήκη κατάλληλων δραστικών άμινο-ομάδων στην επιφάνεια των νανοσωματιδίων. Επιλέχθηκαν να εξεταστούν δύο στερεοϊσομερείς μορφές του πολυ(γαλακτικού οξέος), διαφορετικής κρυσταλλικότητας, το PLLA και το PDLLA. Έτσι, παρασκευάστηκαν νανοσύνθετα υλικά PDLLA/SiO2 και PDLLA/amino-SiO2 με in situ πολυμερισμό διάνοιξης δακτυλίου του λακτιδίου του D,L-λακτιδίου και νανοσύνθετα υλικά PLLA/SiO2 και PLLA/amino-SiO2 με την μέθοδο της εναπόθεσης με περιστροφή (spin coating). Η επιτυχής σύνθεση των υλικών, τα κρυσταλλογραφικά τους χαρακτηριστικά και οι θερμικές τους ιδιότητες προσδιορίστηκαν με: φασματοσκοπία υπερύθρου (FTIR), κρυσταλλογραφία ακτίνων-x (XRD), διαφορική θερμιδομετρία σάρωσης (DSC) και θερμοσταθμική ανάλυση (TGA). Επιπλέον, το μοριακό βάρος των νανοσύνθετων PDLLA προσδιορίστηκε με υπολογισμό του εσωτερικού ιξώδους (ΙV) και η βιοαποικοδομησιμότητά των νανοσύνθετων του PLLA με ενζυμική υδρόλυση και ηλεκτρονική μικροσκοπία σάρωσης (SEM).
description: Aim of this work is the study of nanocomposite materials with a poly(lactic acid) (PLA) polymeric matrix and the impact of the nanofillers on the material properties. For this reason, poly(lactic acid) nanocomposites with various molar ratios of fumed silica (SiO2) and amino-functionalized silica nanoparticles have been prepared. Since the final properties of PLA are related to the enantiomeric composition, two enantiomeic forms of PLA, PLLA and PDLLA, were prepared and investigated. More precisely, PDLLA/SiO2 and PDLLA/amino-SiO2 nanocomposites were prepared via in situ ring opening polymerization of D,L-lactide and PLLA/SiO2 and PLLA/amino-SiO2 nanocomposite films were prepared via spin coating method. The successful synthesis of the materials, their morphological characteristics and thermal behavior was investigated with Fourier transform infrared spectroscopy (FTIR), X-ray diffraction analysis (XRD), Differential scanning calorimetry (DSC) and Thermogravimetric analysis (TGA). In addition, the molecular weight of the PDLLA nanocomposites was determined with viscosity measurements. Moreover, biodegradation experiments accompanied by SEM images were performed to study the effect of the incorporation of the nanoparticles in the polymer matrix on the biodegradation of PLLA.
Nanoscale magnetic structure of ferromagnet/antiferromagnet manganite multilayers
Creators: name: Niebieskikwiat, D.
name: Hueso, L. E.
name: Borchers, J. A.
name: Mathur, N. D.
name: Salamon, M. B.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: Polarized Neutron Reflectometry and magnetometry measurements have been used to obtain a comprehensive picture of the magnetic structure of a series of La{2/3}Sr{1/3}MnO{3}/Pr{2/3}Ca{1/3}MnO{3} (LSMO/PCMO) superlattices, with varying thickness of the antiferromagnetic (AFM) PCMO layers (0<=t_A<=7.6 nm). While LSMO presents a few magnetically frustrated monolayers at the interfaces with PCMO, in the latter a magnetic contribution due to FM inclusions within the AFM matrix was found to be maximized at t_A~3 nm. This enhancement of the FM moment occurs at the matching between layer thickness and cluster size, where the FM clusters would find the optimal strain conditions to be accommodated within the "non-FM" material. These results have important implications for tuning phase separation via the explicit control of strain.
description: 4 pages, submitted to PRL
Trajectory Optimization Methods for Robotic Cells Considering Energy Efficiency and Collisions
Creators: name: Knöchelmann, Elias
name: Steinke, Dwayne
name: Greenyer, Joel
name: Spindeldreier, Svenja
name: Ortmaier, Tobias
Publisher: name: Berlin u.a. : Springer Vieweg
Year: 2020
Subjects: subject: robots
subject: industrial production
subject: optimization
subject: Dewey Decimal Classification::600 | Technik::620 | Ingenieurwissenschaften und Maschinenbau

description: In production robots are moved at maximum speed whenever possible in order to achieve the shortest overall cycle time. This can lead to individual waiting times, especially in interlinked production processes. These waiting times offer opportunities for optimization. Due to high energy prices and political efforts, energy efficiency has become the focus of trajectory optimization in recent years. Robot cells with a common intermediate circuit offer the possibility of energy exchange across individual axes or robots. By adapting the robot trajectories, the total power consumption of a robotic cell on the grid side can be significantly reduced. This paper focuses on trajectory optimization, whereby a detailed collision detection of individual robots is included within the analysis. It is shown that with collision detection energy optimization for cramped robot cells becomes possible and the losses in efficiency compared to the optimization without it are minute.
Horismenus butcheri Hansson & Aebi
Creators: name: Hansson, Christer
name: Kenyon, Sarah G.
name: Benrey, Betty
Publisher: name: Zenodo
Year: 2019
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Hymenoptera
Eulophidae
Horismenus
Horismenus butcheri

description: Horismenus butcheri Hansson & Aebi
Figs 34, 37, 40, 43–47.
 Horismenus butcheri Hansson & Aebi, in Hansson et al. 2004:10. Holotype female in NHM, examined.
 Diagnosis. Antennal scrobes join below frontal suture; female flagellomeres 1–3 long, e.g. 1 st flagellomere 3.1× as long as wide (Fig. 34); male scape narrow, 4.5× as long as wide (Fig. 47); forewing speculum open below; scutellum convex; first gastral tergite with punctures in posterior 2/3 (Fig. 40); female gaster elongate, MM/LG = 0.8–0.9.
 Distribution. Mexico and U.S.A. (New Mexico) (Hansson et al. 2004).
 Hosts. Acanthoscelides sp. on Phaseolus vulgaris and P. coccineus, and Bruchus amicus (both Coleoptera: Chrysomelidae: Bruchinae) (Hansson et al. 2004).
 Material examined. Type material: As accounted for in Hansson et al. (2004). Additional material: MEXICO: Mexico, Michoacan, Morelos, from Acanthoscelides sp. on Phaseolus vulgaris and P. coccineus 11♀ 10♂ (MZLU).
 Molecular data. Horismenus butcheri equals “HB3” in Kenyon et al. (2015) and molecular data associated with “HB3” is accounted for in that paper.
description: Published as part of Hansson, Christer, Kenyon, Sarah G. & Benrey, Betty, 2019, Species of Horismenus Walker (Hymenoptera: Eulophidae) associated with bruchid beetles (Coleoptera: Chrysomelidae: Bruchinae), including five new species, pp. 168-188 in Zootaxa 4585 (1) on pages 185-186, DOI: 10.11646/zootaxa.4585.1.10, http://zenodo.org/record/2636143
Colossal spin fluctuations in a molecular quantum dot magnet with ferromagnetic electrodes
Creators: name: Jonckheere, Thibaut
name: Imura, Ken-Ichiro
name: Martin, Thierry
Publisher: name: arXiv
Year: 2008
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We study electronic transport through a magnetic molecule with an intrinsic spin $S$ coupled to two magnetic electrodes, in the incoherent regime. The molecule is modeled as a single resonant level with large Coulomb repulsion (no double occupancy). The molecular spin is isotropic and it interacts with the electronic spin through an exchange interaction. Using an alternative method to the usual master equation approach, we are able to obtain analytical formulas for various physical quantities of interest, such as the mean current and the current fluctuations, but also the mean value of $J_z$ -the $z$ component of the total spin on the molecule- and its fluctuations. This allows us to understand how the electronic current between the magnetized electrodes can control the polarization of the molecular spin. We observe in particular that the fluctuations of $J_z$ reach unexpectedly high values.
Does FLASH deplete Oxygen? Experimental Evaluation for Photons, Protons and Carbon Ions
Creators: name: Jansen, Jeannette
name: Knoll, Jan
name: Beyreuther, Elke
name: Pawelke, Jörg
name: Skuza, Raphael
name: Hanley, Rachel
name: Brons, Stephan
name: Pagliari, Francesca
name: Seco, Joao
Publisher: name: arXiv
Year: 2021
Subjects: subject: Medical Physics (physics.med-ph)
subject: FOS: Physical sciences

description: Purpose: To investigate experimentally, if FLASH irradiation depletes oxygen within water for different radiation types such as photons, protons and carbon ions. Methods: This study presents measurements of the oxygen consumption in sealed, 3D printed water phantoms during irradiation with X-rays, protons and carbon ions at varying dose rates up to 340 Gy/s. The oxygen measurement was performed using an optical sensor allowing for non-invasive measurements. Results: Oxygen consumption in water only depends on dose, dose rate and linear energy transfer (LET) of the irradiation. The total amount of oxygen depleted per 10 Gy was found to be 0.04 - 0.18 % atm for 225 kV photons, 0.04 - 0.25 % atm for 224 MeV protons and 0.09 - 0.17 % atm for carbon ions. consumption depends on dose rate by an inverse power law and saturates for higher dose rates because of self-interactions of radicals. Higher dose rates yield lower oxygen consumption. No total depletion of oxygen was found for clinical doses. Conclusions: FLASH irradiation does consume oxygen, but not enough to deplete all the oxygen present. For higher dose rates, less oxygen was consumed than at standard radiotherapy dose rates. No total depletion was found for any of the analyzed radiation types for 10 Gy dose delivery using FLASH.
description: 23 pages, 7 figures
Narratives of student experience, reflection, and transformation in experiential, cross-cultural learning
Creators: name: Tuffo, Kelly Marie
Publisher: name: University of British Columbia
Year: 2009

description: This study is an investigation of the process of experiential, cross-cultural learning. Through in-depth interviews, twelve U.S. undergraduate students discussed their experiences in semester-long experiential cultural immersion programs in non-industrialized countries approximately one year after returning home. They recounted their experiences and reflected on the ways in which these experiences led to personal transformation as a result of experiential, cross-cultural learning. The study also examined critical elements of this learning process and the conditions that led to an increase in the intensity of cultural immersion. Three main areas of the learning process were examined: 1) critical relationships developed during the time abroad that provided students with opportunities for cross-cultural dialogue and emotional support 2) critical incidents and crises that challenged students’ cultural values and meaning perspectives and created feelings of cultural marginality, and 3) consequent changes in students’ meaning perspectives resulting from their experiences and critical reflection. Theories of experiential learning, experiential, cross-cultural learning, and Mezirow’s (1991) theory of transformative learning form the theoretical framework for this thesis. This learning process is found to have significant formative and transformative effects on students. Some changes that students experienced included increased self-awareness, value clarification, improved levels of self-confidence, transformed meaning perspectives or world views, development of feelings of human and cultural reciprocity, and commitment to career goals. The analysis of this learning process of young adults leads to some modification of Mezirow’s theory. This study provides in-depth insight into the student viewpoint of the experiential, cross cultural learning process, and informs the larger field of study abroad in terms of the experiential dynamics of all cultural immersion programs. In addition, this study sheds light on the application of Mezirow’s transformation theory to the learning of young adults.
Adherence to food-based dietary guidelines among adolescents in Germany according to socio-economic status and region: results from Eating Study as a KiGGS Module (EsKiMo) II
Creators: name: Brettschneider, Anna-Kristin
name: Lage Barbosa, Clarissa
name: Haftenberger, Marjolein
name: Lehmann, Franziska
name: Mensink, Gert BM
Publisher: name: Robert Koch-Institut
Year: 2021
Subjects: subject: Food consumption
subject: Food-based dietary guidelines
subject: Adolescents
subject: Germany
subject: National nutrition survey
subject: 610 Medizin und Gesundheit

description: Objective: Dietary habits developed during childhood and adolescence are likely to continue into adulthood. An unbalanced diet may cause nutrient deficiencies and excessive energy intake; these enhance the risk for developing overweight and obesity and their co-morbidities. In the present analysis, food consumption of adolescents is described and evaluated against German food-based dietary guidelines with special focus on socio-economic status (SES) and region of residence. Design: Within the ‘German Health Interview and Examination Survey for Children and Adolescents’ (KiGGS Wave 2), the cross-sectional ‘Eating Study as a KiGGS Module’ (EsKiMo II) was conducted from 2015 until 2017 to provide data about dietary behaviour. Setting: Germany. Participants: 1353 adolescents aged 12–17 years from a nationwide representative sample with food consumption data from computer-assisted dietary history interviews. Results: The median consumption of fruits, vegetables, starchy foods and milk/dairy products among adolescents in Germany was below the recommendation. The median consumption of both meat/meat products and unfavourable foods, like confectionery, which should be consumed sparingly, was about 1·5 times the recommended amount. The total amount of beverages consumed by most adolescents was above the minimum amount recommended. Soft drink consumption of adolescents with a low SES was three to five times higher than soft drink consumption of adolescents with a high SES. Conclusions: The results indicate the need for an improvement of dietary habits among adolescents in Germany. Further approaches to promote healthy diets in Germany should be continued, and the focus on social inequalities should be strengthened.
Black Hole Mergers and Unstable Circular Orbits
Creators: name: Pretorius, Frans
name: Khurana, Deepak
Publisher: name: arXiv
Year: 2007
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We describe recent numerical simulations of the merger of a class of equal mass, non-spinning, eccentric binary black hole systems in general relativity. We show that with appropriate fine-tuning of the initial conditions to a region of parameter space we denote the threshold of immediate merger, the binary enters a phase of close interaction in a near-circular orbit, stays there for an amount of time proportional to logarithmic distance from the threshold in parameter space, then either separates or merges to form a single Kerr black hole. To gain a better understanding of this phenomena we study an analogous problem in the evolution of equatorial geodesics about a central Kerr black hole. A similar threshold of capture exists for appropriate classes of initial conditions, and tuning to threshold the geodesics approach one of the unstable circular geodesics of the Kerr spacetime. Remarkably, with a natural mapping of the parameters of the geodesic to that of the equal mass system, the scaling exponent describing the whirl phase of each system turns out to be quite similar. Armed with this lone piece of evidence that an approximate correspondence might exist between near-threshold evolution of geodesics and generic binary mergers, we illustrate how this information can be used to estimate the cross section and energy emitted in the ultra relativistic black hole scattering problem. This could eventually be of use in providing estimates for the related problem of parton collisions at the Large Hadron Collider in extra dimension scenarios where black holes are produced.
description: 16 pages, 12 figures; updated to coincide with journal version
Horismenus depressus Gahan
Creators: name: Hansson, Christer
name: Kenyon, Sarah G.
name: Benrey, Betty
Publisher: name: Zenodo
Year: 2019
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Hymenoptera
Eulophidae
Horismenus
Horismenus depressus

description: Horismenus depressus Gahan
Figs 1–4, 14, 16.
 Horismenus depressus Gahan, 1930:8. Lectotype female in USNM, designated by Burks (1971), not examined.
 Diagnosis. Very similar to H. depressoides, but differs in having a smaller propodeal spiracle (Fig. 14), female gaster with apex distinctly more pointed (Fig. 16), and mesoscutum and scutellum dull golden-green (Fig. 2).
 Distribution. U.S.A. (Arizona (new record), California (Gahan 1930), Texas (new record)).
 Hosts. Stator pruininus (Horn) (Coleoptera: Chrysomelidae: Bruchinae) from seeds of Acacia and Olneya (Gahan 1930), Stator limbatus (Horn) on Acacia gregii and Parkinsonia florida (new records).
 Material examined. Type material: Two female and two male paralectotypes of H. depressus in USNM. Additional material: USA: Arizona (Oro Valley), 63♀ 45♂ (MZLU, NHM); Texas (Brownsville & Roma), 4♀ (NHM).
 Molecular data. Horismenus depressus equals “HD2” in Kenyon et al. (2015) and molecular data associated with “HD2” is accounted for in that paper.
 Remarks. H. depressus is very similar to H. depressoides and has previously been misidentified as this species (Hansson et al. 2004, Hansson 2009). Due to the difficulty in separating these two species the distributional and biological records presented here include only specimens that have been examined for this manuscript.
description: Published as part of Hansson, Christer, Kenyon, Sarah G. & Benrey, Betty, 2019, Species of Horismenus Walker (Hymenoptera: Eulophidae) associated with bruchid beetles (Coleoptera: Chrysomelidae: Bruchinae), including five new species, pp. 168-188 in Zootaxa 4585 (1) on page 186, DOI: 10.11646/zootaxa.4585.1.10, http://zenodo.org/record/2636143
Multiscale, multiwavelength extraction of sources and filaments using separation of the structural components: getsf
Creators: name: Men'shchikov, A.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: FOS: Physical sciences

description: High-quality astronomical images delivered by modern ground-based and space observatories demand adequate, reliable software for their analysis and accurate extraction of sources, filaments, and other structures, containing massive amounts of detailed information about the complex physical processes in space. The multiwavelength observations with highly variable angular resolutions across wavebands require extraction tools that preserve and use the invaluable high-resolution information. This paper presents getsf, a new method for extracting sources and filaments in astronomical images using separation of their structural components, designed to handle multiwavelength sets of images and very complex filamentary backgrounds. The method spatially decomposes the original images and separates the structural components of sources and filaments from each other and from their backgrounds, flattening their resulting images. It spatially decomposes the flattened components, combines them over wavelengths, detects the positions of sources and skeletons of filaments, and measures the detected sources and filaments. This paper presents a realistic multiwavelength set of simulated benchmark images that can serve as the standard benchmark problem to evaluate qualities of source- and filament-extraction methods. This paper describes hires, an improved algorithm for the derivation of high-resolution surface densities from the multiwavelength far-infrared Herschel images. The algorithm allows creating the surface densities with angular resolutions that reach 5.6 arcsec, when the 70 micron image is used. The codes getsf and hires are illustrated by their applications to a variety of images, from the X-ray domain to the millimeter wavelengths.
description: 37 pages, 25 figures, accepted by Astronomy & Astrophysics, final language-edited version