cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Applying Topic Modeling in Disaster Risk Reduction Articles
Creators: name: Κοπαλίδης Νικόλαος Παύλου
Publisher: name: Aristotle University of Thessaloniki
Year: 2022
Subjects: Θεματική μοντελοποίηση
Αλγόριθμος λανθάνουσας κατανομής
Μείωση Κινδύνου Καταστροφών
Topic modeling
Algorithm Latent Dirichlet Αllocation
Disaster Risk Reduction

description: This thesis aims to apply a Latent Dirichlet Allocation (LDA) topic modeling algorithm to Disaster Risk Reduction (DRR) related articles. The articles used are English textual data which were collected through a digital resource provided by the International Journal of Disaster Risk Reduction (IJDRR) from 2017 to 2021. The study leverages 2000 articles on DRR, which aims to both reduce existing disaster risks caused by natural hazards such as earthquakes, floods, droughts and cyclones and prevent future disasters, as well as contribute to building resilience through ethical prevention. The topic modeling was carried out in the ecosystem of Python-Gensim. The research questions of this paper focus on the following: (1) What are the most discussed and interesting topics in DRR articles during the time period 2017-2021 (2) What role did the coronavirus pandemic play in the number of DRR scientific articles during the time period (3) What conclusions do we draw from the use of the word intrusion method in the generated LDA model.
description: Η παρούσα διπλωματική έχει ως στόχο την εφαρμογή αλγορίθμου θεματικής μοντελοποίησης Latent Dirichlet Allocation (LDA), που αφορούν το Disaster Risk Reduction (DRR). Τα άρθρα που χρησιμοποιήθηκαν είναι αγγλικά δεδομένα κειμένων και συλλέχθηκαν μέσω ψηφιακής πηγής που παρέχει το περιοδικό International Journal of Disaster Risk Reduction (IJDRR) από την χρονική περίοδο 2017 μέχρι και 2021. Η μελέτη αξιοποιεί 2000 άρθρα σχετικά με το DRR, το οποίο αποσκοπεί τόσο στη μείωση των υφιστάμενων κινδύνων καταστροφών που προκαλούνται από φυσικούς κινδύνους όπως οι σεισμοί, οι πλημμύρες, οι ξηρασίες και οι κυκλώνες όσο και στην πρόληψη μελλοντικών καταστροφών, καθώς και συμβολή στην οικοδόμηση ανθεκτικότητας μέσω της ηθικής πρόληψης. H θεματική μοντελοποίηση πραγματοποιήθηκε στο περιβάλλον της Python-gensim.Τα ερευνητικά ερωτήματα του παρόντος εγγράφου επικεντρώνονται στα εξής: (1) Ποια είναι τα πιο πολυσυζητημένα και ενδιαφέροντα θέματα στα άρθρα του DRR κατά τη χρονική περίοδο 2017-2021. (2) Τι ρόλο έπαιξε η σχέση της πανδημίας του κορονοϊού με το πλήθος επιστημονικών άρθρων του DRR κατά την χρονική περίοδο (3). Τι συμπεράσματα εξάγονται από την χρήση της μεθόδου Word Intrusion στο παραγόμενο μοντέλο του LDA
VASE LIFE ANALYSIS OF YELLOW GLADIOLUS USING DIFFERENT VASE SOLUTIONS
Creators: name: Mehraj, H
name: MAHASEN, M.
name: Taufique, Tropa
name: Shiam, I. H.
name: Uddin, A.F.M. Jamal
Publisher: name: figshare
Year: 2020
Subjects: Post harvest horticultural technologies (incl. transportation and storage)

description: A postharvest experiment was conducted to maximize the vase life of yellow colored gladiolus using different vase solution in department of horticulture, Sher-e-Bangla Agricultural University. Vase solutions were; tap water (control, C0); distilled water (C1); 100-ppm sucrose solution (C2); 100-ppm lemon juice solution (C3) and 100-ppm sucrose + lemon juice solution (C4). Vase solution 100-ppm of sucrose + lemon juice solution (C4) provided maximum days taken for floret senescence (10.2 days), maximum number of floret opened during floret senescence (9.3 florets), highest longevity (18.3 days) with minimum fresh weight loss (28.2%) whereas minimum days required for floret senescence (4.5days) in C3, minimum number of floret opened during floret senescence (3.9 florets) in C0. Lowest longevity (12.7days) found in C3 and maximum fresh weight loss (39.7%) in C0. 100-ppm sucrose + lemon juice solution was found best to extend the vase life of yellow gladiolus.
Divisibility in the category of binary relations and kindred categories
Creators: name: Fitz-Gerald., Desmond Gerald
Publisher: name: Monash University
Year: 2021

description: This thesis was scanned from the print manuscript for digital preservation and is copyright the author.
 Researchers can access this thesis by asking their local university, institution or public library to
 make a request on their behalf. Monash staff and postgraduate students can use the link in the References field.
Isolation of 3-(4-hydroxyphenyl)methylpropenoate and bioactivity evaluation of Gomphrena celosioides extracts
Creators: name: Dosumu, O. O.
name: Ekundayo, O.
name: Idowu, P. A.
name: Onocha, P. A.
Publisher: name: Technische Universität Dortmund
Year: 2011
Subjects: subject: anthelmintic
subject: antimicrobial
subject: cytotoxicity
subject: Gomphrena celosioides
subject: phytochemical analysis
subject: 610

description: The efficacy of Gomphrena celosioides extracts in traditional medicine in the treatment of infectious diseases was evaluated by biological assays. The bioactivities of the extracts of this plant were tested against organisms. The ethyl acetate and methanol extracts of the plant displayed inhibition activities on Staphylococcus aureus, Bacillus subtilis, Pseudomonas aeruginosa, Escherichia coli and Salmonella typhi. Methanol extract was active against Candida albicans, Aspergillus niger and Trichophyton species with diameter zones of inhibition between 14 and 20 mm. Fractionation of the methanol extract produced 3-(4-hydroxyphenyl) ethylpropenoate with mild antimicrobial activity against the test microorganisms. The anthelmintic assay showed ethyl acetate and methanol extracts to be active against Fasciola gigantica, Taenia solium and Pheretima pasthuma. Ethyl acetate was the most toxic of the extracts causing paralysis of Taenia solium within 15 minutes and the death of Fasciola gigantica within 20 minutes of application. The brine shrimp assay gave an LC50 of 52.15 and 77.98 μg/ml on hexane and methanol extracts respectively. The result of this work corroborated the folkloric use of Gomphrena celosioides in the treatment of infectious diseases.
description: EXCLI Journal ; Vol. 9, 2010
A gas density drop in the inner 6 AU of the transition disk around the Herbig Ae star HD 139614: Further evidence for a giant planet inside the disk?
Creators: name: Carmona, A.
name: Thi, W. F.
name: Kamp, I.
name: Baruteau, C.
name: Matter, A.
name: Ancker, M. van den
name: Pinte, C.
name: Kóspál, A.
name: Audard, M.
name: Liebhart, A.
name: Sicilia-Aguilar, A.
name: Pinilla, P.
name: Regály, Zs.
name: Güdel, M.
name: Henning, Th.
name: Cieza, L. A.
name: Baldovin-Saavedra, C.
name: Meeus, G.
name: Eiroa, C.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: Context: Quantifying the gas content inside the dust gaps of transition disks is important to establish their origin. Aims: We seek to constrain the surface density of warm gas in the disk of HD 139614, a Herbig Ae star with a transition disk exhibiting a dust gap from 2.3 to 6 AU. Methods: We have obtained ESO/VLT CRIRES high-resolution spectra of CO ro-vibrational emission. We derived constraints on the disk's structure by modeling the line-profiles, the spectroastrometric signal, and the rotational diagrams using flat Keplerian disk models. Results: We detected v=1-0 12CO, 2-1 12CO, 1-0 13CO, 1-0 C18O, and 1-0 C17O ro-vibrational lines. 12CO v=1-0 lines have an average width of 14 km/s, Tgas of 450 K and an emitting region from 1 to 15 AU. 13CO and C18O lines are on average 70 and 100 K colder, 1 and 4 km/s narrower, and are dominated by emission at R>6 AU. The 12CO v=1-0 line-profile indicates that if there is a gap in the gas it must be narrower than 2 AU. We find that a drop in the gas surface density (delta_gas) at R<5-6 AU is required to simultaneously reproduce the line-profiles and rotational diagrams of the three CO isotopologs. Delta_gas can range from 10^-2 to 10^-4 depending on the gas-to-dust ratio of the outer disk. We find that at 12 AU) gas gap suggest the presence of an embedded <2 MJ planet at around 4 AU.
description: accepted for publication in A&A; 30 pages (including Appendix), 24 figure; v2-v4: text corrections
Existence and Stability of standing waves for supercritical NLS with a Partial Confinement
Creators: name: Bellazzini, J.
name: Boussaid, N.
name: Jeanjean, L.
name: Visciglia, N.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Analysis of PDEs (math.AP)
subject: Mathematical Physics (math-ph)
subject: FOS: Mathematics
subject: FOS: Physical sciences

description: We prove the existence of orbitally stable ground states to NLS with a partial confinement together with qualitative and symmetry properties. This result is obtained for nonlinearities which are $L^2$-supercritical, in particular we cover the physically relevant cubic case. The equation that we consider is the limit case of the cigar-shaped model in BEC.
description: Revised version, accepted on Comm. Math. Physics
Μαθησιακή Αναλυτική στα ΜΟΟCs
Creators: name: Κολιοπάνου, Στυλιανή Χρήστου
Publisher: name: Aristotle University of Thessaloniki
Year: 2022
Subjects: Μαθησιακή Αναλυτική
Μαζικά Ανοιχτά Διαδικτυακά Μαθήματα
Διαλογικός Πράκτορας
Learning Analytics
Massive Open Online Courses (MOOCs)
Chatbot

description: Σκοπός της εργασίας είναι σε ένα ΜOOC να δημιουργήσουμε ομάδες SRL, που προκύπτουν από την ομαδοποίηση αυτού του δείκτη και να συγκρίνουμε αυτές τις ομάδες ως προς τις επιδόσεις τους και τις προτιμήσεις τους, όπως για παράδειγμα τι βαθμολογίες απέκτησαν στα παιχνίδια γνώσεων, στις ασκήσεις και πως ψηφίζουν στις ερωτήσεις κλειστού τύπου. Ο γενικός στόχος της μελέτης είναι να προσπαθήσουμε να εντοπίσουμε στατιστικά σημαντικές διαφορές μεταξύ αυτών των ομάδων στην κάθε κατηγορία και να τα αξιολογήσουμε ως προς τις επιδόσεις και τις προτιμήσεις τους. Συνολικά, η τρέχουσα εργασία παρουσιάζει μια ανάλυση αυτών των ομάδων με στατιστικά μοντέλα έχοντας σκοπό την βελτίωση των μαθησιακών τους επιδόσεων. Τα ερευνητικά ερωτήματα αυτής της διατριβής αφορούν: (1) Πως αξιολογείται η συμπεριφορά των εκπαιδευόμενων. (2) Τι προβλέπουν τα αποτελέσματα μεταξύ των συγκρίσεων των ομάδων. Τα βασικά συμπεράσματα της εργασίας είναι ότι δεν υπάρχουν μεγάλες διαφοροποιήσεις μεταξύ των ομάδων όσο αφορά τις επιδόσεις τους. Παρατηρείται όμως ότι με την πάροδο του χρόνου της συμμετοχής τους μειώνεται η απόδοση τους στις ασκήσεις και τα ερωτηματολόγια.
description: The purpose of the thesis is to create SRL groups, which result from the grouping of this index and compare these groups in terms of their performance and preferences, such as what scores they obtained in quizzes, in exercises and how they vote in closed-type questions. The overall aim of the study is to try to identify statistically significant differences between these groups in each category and evaluate them in terms of their performance and preferences. Overall, the current paper presents an analysis of these groups with statistical models. The research questions of this thesis relate to: (1) How is the behavior of learners evaluated. (2) What are the results expected between the comparisons of the groups. The main conclusions of the thesis are that there are no great differences between the groups in terms of their performance. However, it is observed that over the time of their participation their performance in exercises and questionnaires is reduced.
Frank Bauer, Gerhard Bosch, Jörg Bundesmann-Jansen, Hermann Groß, Frank Stille, Alexandra Wagner, 1998: Öffnungszeiten im Einzelhandel 1996. Vor und nach Änderung des Ladenschlussgesetzes (im Auftrag des Ministeriums für Arbeit, Gesundheit und Soziales des Landes Nordrhein-Westfalen), Köln/Gelsenkirchen/Berlin, 120 S. u. Anhang, kostenlos
Creators: name: Trinczek, Rainer
Publisher: name: Lucius & Lucius Verlagsgesellschaft
Year: 2000
Subjects: subject: 300
subject: 650

description: Arbeit
title: Zeitautonom Teilzeit versus Vollzeit arbeitende Männer
title: Ein empirischer Vergleich
titleType: AlternativeTitle
Creators: name: Grossenbacher, Simon
name: Udris, Ivars
Publisher: name: Lucius & Lucius Verlagsgesellschaft
Year: 2000
Subjects: subject: 300
subject: 650

description: Arbeit
Sublimation of icy aggregates in the coma of comet 67P/Churyumov-Gerasimenko detected with the OSIRIS cameras onboard Rosetta
Creators: name: Gicquel, A.
name: Vincent, J. -B.
name: Agarwal, J.
name: A'Hearn, M. F.
name: Bertini, I.
name: Bodewits, D.
name: Sierks, H.
name: Lin, Z. -Y.
name: Barbieri, C.
name: Lamy, P. L.
name: Rodrigo, R.
name: Koschny, D.
name: Rickman, H.
name: Keller, H. U.
name: Barucci, M. A.
name: Bertaux, J. -L.
name: Besse, S.
name: Cremonese, G.
name: Da Deppo, V.
name: Davidsson, B.
name: Debei, S.
name: Deller, J.
name: De Cecco, M.
name: Frattin, E.
name: El-Maarry, M. R.
name: Fornasier, S.
name: Fulle, M.
name: Groussin, O.
name: Gutierrez, P. J.
name: Gutierrez-Marquez, P.
name: Guettler, C.
name: Hoefner, S.
name: Hofmann, M.
name: Hu, X.
name: Hviid, S. F.
name: Ip, W. -H.
name: Jorda, L.
name: Knollenberg, J.
name: Kovacs, G.
name: Kramm, J. -R.
name: Kuehrt, E.
name: Kueppers, M.
name: Lara, L. M.
name: Lazzarin, M.
name: Moreno, J. J. Lopez
name: Lowry, S.
name: Marzari, F.
name: Masoumzadeh, N.
name: Massironi, M.
name: Moreno, F.
name: Mottola, S.
name: Naletto, G.
name: Oklay, N.
name: Pajola, M.
name: Pommerol, A.
name: Preusker, F.
name: Scholten, F.
name: Shi, X.
name: Thomas, N.
name: Toth, I.
name: Tubiana, C.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: FOS: Physical sciences

description: Beginning in March 2014, the OSIRIS (Optical, Spectroscopic, and Infrared Remote Imaging System) cameras began capturing images of the nucleus and coma (gas and dust) of comet 67P/Churyumov-Gerasimenko using both the wide angle camera (WAC) and the narrow angle camera (NAC). The many observations taken since July of 2014 have been used to study the morphology, location, and temporal variation of the comet's dust jets. We analyzed the dust monitoring observations shortly after the southern vernal equinox on May 30 and 31, 2015 with the WAC at the heliocentric distance Rh = 1.53 AU, where it is possible to observe that the jet rotates with the nucleus. We found that the decline of brightness as a function of the distance of the jet is much steeper than the background coma, which is a first indication of sublimation. We adapted a model of sublimation of icy aggregates and studied the effect as a function of the physical properties of the aggregates (composition and size). The major finding of this article was that through the sublimation of the aggregates of dirty grains (radius a between 5 microm and 50 microm) we were able to completely reproduce the radial brightness profile of a jet beyond 4 km from the nucleus. To reproduce the data we needed to inject a number of aggregates between 8.5 x $10^{13}$ and 8.5 x $10^{10}$ for a = 5 microm and 50 microm respectively, or an initial mass of $H_2O$ ice around 22kg.
description: 11 pages, 7 figures, 3 tables, special issue "The ESLAB 50 Symposium - spacecraft at comets from 1P/Halley to 67P/Churyumov-Gerasimenko" in the Monthly Notices of the Royal Astronomical Society
Thiosulfate and thiosulfonate complexes of copper(II) : implications for gold leaching
Creators: name: Fischmann., Adam James
Publisher: name: Monash University
Year: 2021

description: This thesis was scanned from the print manuscript for digital preservation and is copyright the author.
 Researchers can access this thesis by asking their local university, institution or public library to
 make a request on their behalf. Monash staff and postgraduate students can use the link in the References field.
A statistical state dynamics approach to wall-turbulence
Creators: name: Farrell, Brian F.
name: Gayme, Dennice F.
name: Ioannou, Petros J.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Fluid Dynamics (physics.flu-dyn)
subject: FOS: Physical sciences

description: This paper reviews results from the study of wall-bounded turbulent flows using statistical state dynamics (SSD) that demonstrate the benefits of adopting this perspective for understanding turbulence in wall-bounded shear flows. The SSD approach used in this work employs a second-order closure which isolates the interaction between the streamwise mean and the equivalent of the perturbation covariance. This closure restricts nonlinearity in the SSD to that explicitly retained in the streamwise constant mean together with nonlinear interactions between the mean and the perturbation covariance. This dynamical restriction, in which explicit perturbation-perturbation nonlinearity is removed from the perturbation equation, results in a simplified dynamics referred to as the restricted nonlinear (RNL) dynamics. RNL systems in which an ensemble of a finite number of realizations of the perturbation equation share the same mean flow provide tractable approximations to the equivalently infinite ensemble RNL system. The infinite ensemble system, referred to as the S3T, introduces new analysis tools for studying turbulence. The RNL with a single ensemble member can be alternatively viewed as a realization of RNL dynamics. RNL systems provide computationally efficient means to approximate the SSD, producing self-sustaining turbulence exhibiting qualitative features similar to those observed in direct numerical simulations (DNS) despite its greatly simplified dynamics. Finally, we show that RNL turbulence can be supported by as few as a single streamwise varying component interacting with the streamwise constant mean flow and that judicious selection of this truncated support, or "band-limiting", can be used to improve quantitative accuracy of RNL turbulence. The results suggest that the SSD approach provides new analytical and computational tools allowing new insights into wall-turbulence.
description: to appear in Phil. Trans. R. Soc. A
Denkanstöße zum Diversity Management
Creators: name: Vedder, Günther
Publisher: name: Lucius & Lucius Verlagsgesellschaft
Year: 2005
Subjects: subject: Arbeitsorganisation/Gruppenarbeit
subject: Genderperspektive
subject: Personalführung
subject: 300
subject: 650

description: Das Konzept Diversity Management wurde in den achtziger Jahren in den USA als Reaktion auf demographische Veränderungen auf dem Arbeitsmarkt entwickelt. Inzwischen hat sich Diversity auch zu einem wichtigen Thema für Organisationen in Deutschland und anderen westlichen Ländern entwickelt. Obwohl das Konzept seit vielen Jahren angewendet wird, sind einige grundlegende Fragen offen geblieben. Dieser Beitrag analysiert und diskutiert mehrere Kernaussagen von Diversity Management. Er wagt einen Blick hinter die verwendete Metapher und die Machtverhältnisse rund um die Anwendung des Konzepts in Organisationen. Einige Prognosen und mögliche Wirkungen von Diversity Management bleiben fragwürdig. Wissenschaftler könnten durch verstärkte Forschungsaktivitäten zur Beantwortung einiger offener Fragen des sehr interessanten Konzepts beitragen.
description: Arbeit
The Bose polaron problem: effect of mass imbalance on binding energy
Creators: name: Ardila, L. A. Peña
name: Giorgini, S.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Quantum Gases (cond-mat.quant-gas)
subject: FOS: Physical sciences

description: By means of Quantum Monte Carlo methods we calculate the binding energy of an impurity immersed in a Bose-Einstein condensate at T = 0. The focus is on the attractive branch of the Bose polaron and on the role played by the mass imbalance between the impurity and the surrounding particles. For an impurity resonantly coupled to the bath, we investigate the dependence of the binding energy on the mass ratio and on the interaction strength within the medium. In particular, we determine the equation of state in the case of a static (infinite mass) impurity, where three-body correlations are irrelevant and the result is expected to be a universal function of the gas parameter. For the mass ratio corresponding to $^{40}$K impurities in a gas of $^{87}$Rb atoms we provide an explicit comparison with the experimental findings of a recent study carried out at JILA.
description: 5 pages, 3 figures
Manfred Garhammer: Wie Europäer ihre Zeit nutzen. Zeitstrukturen und Zeitkulturen im Zeichen der Globalisierung, Berlin: edition sigma. 1999, ISBN 3-89404-462-4, 555 S., DM 58,-
Creators: name: Bauer, Frank
Publisher: name: Lucius & Lucius Verlagsgesellschaft
Year: 2000
Subjects: subject: 300
subject: 650

description: Arbeit
Superconductivity and the lattice softening in vanadium-silicon alloys
Creators: name: Finlayson., T.R.
Publisher: name: Monash University
Year: 2021

description: This thesis was scanned from the print manuscript for digital preservation and is copyright the author.
 Researchers can access this thesis by asking their local university, institution or public library to
 make a request on their behalf. Monash staff and postgraduate students can use the link in the References field.
Hints of quantum gravity from the horizon fluid
Creators: name: Cropp, Bethan
name: Bhattacharya, Swastik
name: Shankaranarayanan, S.
Publisher: name: arXiv
Year: 2016
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: For many years researchers have tried to glean hints about quantum gravity from black hole thermodynamics. However, black hole thermodynamics suffers from the problem of Universality --- at leading order, several approaches with different microscopic degrees of freedom lead to Bekenstein-Hawking entropy. We attempt to bypass this issue by using a minimal statistical mechanical model for the horizon fluid based on Damour-Navier-Stokes (DNS) equation. For stationary asymptotically flat black hole spacetimes in General Relativity, we show explicitly that at equilibrium the entropy of the horizon fluid is the Bekenstein-Hawking entropy. Further we show that, for the bulk viscosity of the fluctuations of the horizon fluid to be identical to Damour, a confinement scale exists for these fluctuations, implying quantization of the horizon area. The implications and possible mechanisms from the fluid point of view are discussed.
description: v2: This version accepted to PRD, 10 pages
Structure and kinematics of the clouds surrounding the Galactic mini-starburst W43 MM1
Creators: name: Jacq, T.
name: Braine, J.
name: Herpin, F.
name: van der Tak, F.
name: Wyrowski, F.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: Massive stars have a major influence on their environment yet their formation is difficult to study. W43 is a highly luminous galactic massive star forming region at a distance of 5.5 kpc and the MM1 part hosts a very massive dense core (1000 M$_{\odot}$ within 0.05 pc). We present new Herschel HIFI maps of the W43 MM1 region covering the main low-energy water lines at 557, 987, and 1113 GHz, their H$_2^{18}$O counterparts, and other lines such as $^{13}$CO(10-9) and C$^{18}$O(9-8) which trace warm gas. These water lines are, with the exception of line wings, observed in absorption. Herschel SPIRE and JCMT 450 $μ$m data have been used to make a model of the continuum emission at these wavelengths. Analysis of the maps, and in particular the optical depth maps of each line and feature, shows that a velocity gradient, possibly due to rotation, is present in both the envelope and the protostellar core. Velocities increase in both components from SW to NE, following the general source orientation. While the H$_2$O lines trace essentially the cool envelope, we show that the envelope cannot account for the H$_2^{18}$O absorption, which traces motions close to the protostar. The core has rapid infall, 2.9 kms, as manifested by the H$_2^{18}$O absorption features which are systematically red-shifted with respect to the $^{13}$CO(10-9) emission line which also traces the inner material with the same angular resolution. Some H$_2^{18}$O absorption is detected outside the central core and thus outside the regions expected to be above 100 K - we attribute this to warm gas associated with the other massive dense cores in W43 MM1. Using the maps to identify absorption from cool gas on large scales, we subtract this component to model spectra for the inner envelope. Modeling the new spectra results in a lower water abundance, decreased from $8 10^{-8}$ to $8 10^{-9}$ , with no change in infall rate.
Πλεόνασμα Προσόντων
Creators: name: Παππάς, Κωνσταντίνος Σταύρου
Publisher: name: Aristotle University of Thessaloniki
Year: 2022
Subjects: Πλεόνασμα Προσόντων
Εργασιακή Ικανοποίηση
Εργασιακή Απόδοση
Overqualification
Job Satisfaction
Work Performance

description: Τα τελευταία χρόνια το πλεόνασμα προσόντων (overqualification) έχει απασχολήσει αρκετά την αγορά εργασίας, τόσο σε ευρωπαϊκό, όσο και σε παγκόσμιο επίπεδο. Ο μεγάλος και αδιαλείπτως αυξανόμενος αριθμός των εργαζομένων που καλύπτουν θέσεις εργασίας χαμηλότερων απαιτήσεων έχει προκαλέσει μεγάλες επιπτώσεις όσο αφορά την εργασιακή ικανοποίηση και την απόδοση των εργαζομένων. Η παρούσα εργασία αναπτύσσεται πάνω σε μια έρευνα όπου μέσα από ένα δείγμα 103 εργαζομένων διαφόρων επιχειρήσεων του ιδιωτικού τομέα. Τα αποτελέσματα αυτής της έρευνας διεξήχθησαν με το στατιστικό πρόγραμμα SPSS και οι συσχετίσεις τους συνάδουν με την βιβλιογραφία. Μετά από συγκεκριμένη ανάλυση πάνω στις εξαρτημένες μεταβλητές του πλεονάσματος προσόντων και της εργασιακής ικανοποίησης και της εργασιακής απόδοσης, βρήκαμε την αρνητική συσχέτιση αυτών αλλά και ότι το πλεόνασμα προσόντων δεν συσχετίζεται με την απόδοση των εργαζομένων. ΄Έπειτα, έχουμε συζήτηση-ανάλυση των αποτελεσμάτων, καθώς και προτάσεις σε επίπεδο πολιτικής επιχείρησης. Τέλος, αναφέρονται οι περιορισμοί της έρευνας, καθώς και μελλοντικές προτάσεις για παραπάνω έρευνα στο αντικείμενο.
description: In recent years, overqualification has concerned the labor market quite a bit, both at the European and global level. The large and ever-increasing number of workers filling lower-demand jobs has had a major impact on employee job satisfaction and performance. Overqualification can be characterized as an inversely proportional correlation of a worker's educational level, education, knowledge, experience, and skills with the job offered. The present work is developed on research where through a sample of 150 employees of various companies in the private sector. The results of this research were conducted with the SPSS statistical program and their correlations are consistent with the literature. After a specific analysis on the dependent variables of surplus qualifications, job satisfaction and employee performance, the conclusion of their negative correlation was reached but also that the surplus qualifications and employee performance are not correlating in this research. Afterwards, we have a discussion-analysis of the results, as well as proposals at the level of business policy. Finally, the limitations of the research are mentioned, as well as future proposals for more research on the subject.
Conversion of Spin into Directed Electric Current in Quantum Wells
Creators: name: Eroms, J.
name: Wegscheider, W.
name: Danilov, S. N.
name: Ganichev, S. D.
name: Ivchenko, E. L.
Publisher: name: The American Physical Society
Year: 2001
Subjects: subject: 530

description: Physical Review Letters
title: Puygarreau-Sud et Les Jardins du Puygarreau : nouveaux éléments pour la connaissance de la genèse du quartier (Poitou-Charentes, Vienne, Poitiers) : rapport de fouille archéologique 2014
title: Documents d’archéologie préventive 23
titleType: AlternativeTitle
Creators: name: Gerber, Frédéric
Publisher: name: Inrap
Year: 2022

description: Il n’est pas commun qu’une opération d’archéologie urbaine apporte une masse d’informations aussi exceptionnelle que celle des fouilles réalisées à Poitiers, rue du Puygarreau, en 2012. Couplée aux connaissances issues des fouilles poitevines antérieures, ou bien encore des surveillances de travaux réalisées entre 2010 et 2018, elles ont permis de faire un bond en avant dans la compréhension de la morphogénèse de la ville, des origines jusqu’à l’époque Moderne.
Fasting plasma glucose distributions and their implications for the diagnostic criteria for non-insulin dependent diabetes mellitus in Pacific populations
Creators: name: Finch., Caroline Frances
Publisher: name: Monash University
Year: 2021

description: This thesis was scanned from the print manuscript for digital preservation and is copyright the author.
 Researchers can access this thesis by asking their local university, institution or public library to
 make a request on their behalf. Monash staff and postgraduate students can use the link in the References field.
Precision ESR Measurements of Transverse Anisotropy in the Single-molecule Magnet Ni$_4$
Creators: name: Collett, Charles A.
name: Cassaro, Rafael A. Allão
name: Friedman, Jonathan R.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: We present a method for precisely measuring the tunnel splitting in single-molecule magnets using electron-spin resonance, and use these measurements to precisely and independently determine the underlying transverse anisotropy parameter, given a certain class of transitions. By diluting samples of the SMM Ni$_4$ via co-crystallization in a diamagnetic isostructural analogue we obtain markedly narrower resonance peaks than are observed in undiluted samples. Using custom loop-gap resonators we measure the transitions at several frequencies, allowing a precise determination of the tunnel splitting. Because the transition under investigation occurs at zero field, and arises due to a first-order perturbation from the transverse anisotropy, we can determine the magnitude of this anisotropy independent of any other Hamiltonian parameters. This method can be applied to other SMMs with tunnel splittings arising from first-order transverse anisotropy perturbations.
description: Version to appear in Phys. Rev. B (R). This version contains additional discussion of the sample preparation and a more complete introduction and bibliography. 4 pages, 2 figures
Αποτελέσματα 30-ημερών της χειρουργικής αποκατάστασης οξείας ισχαιμίας κάτω άκρων σε τριτοβάθμιο νοσοκομείο
Creators: name: Τιγκιρόπουλος, Κωνσταντίνος Γεωργίου
Publisher: name: Aristotle University of Thessaloniki
Year: 2022
Subjects: Οξεία ισχαιμία κάτω άκρων
Εμβολεκτομή
Αρτηριακή Θρόμβωση
Acute limb ischemia
Embolectomy
Arterial thrombosis

description: Σκοπός της παρούσης διπλωματικής εργασίας ήταν η αναφορά στην οξεία ισχαιμία των κάτω άκρων. Αναφέρθηκαν με λεπτομέρεια τα επιδημιολογικά δεδομένα, οι αιτιολογικοί παράγοντες που την προκαλούν, η κλινική εικόνα των ασθενών καθώς και η θεραπευτική προσέγγιση στην αντιμετώπιση της πάθησης. Επιπρόσθετα στο ειδικό μέρος της εργασίας έγινε καταγραφή των 30 ημερών αποτελεσμάτων των ασθενών που υποβλήθηκαν σε χειρουργική αντιμετώπιση της οξείας ισχαιμίας με ανοικτή ή ενδαγγειακή χειρουργική σε τριτοβάθμιο αγγειοχειρουργικό κέντρο της βόρειας Ελλάδας από το 2015 ως το 2021. Καταγράφηκε το ιατρικό ιστορικό αυτών, η προεγχειρητική τους κλινική εικόνα και ο εργαστηριακός έλεγχος, η χρονική διάρκεια της ισχαιμίας καθώς και η έκβαση της νόσου εντός 30 ημερών από τη χειρουργική επέμβαση.
description: The aim of this study was to present acute limb ischemia of lower extremities. We reported the causative factors of the disease, the epidemiological data, classification of acute limb ischemia and therapeutic approaches of the disease. At the special section of the manuscript we reported the results of patients who underwent open or endovascular repair of acute limb ischemia at a tertiary vascular centre of northern Greece from 2015 to 2021. It included the medical history of patients, the preoperative laboratory values, the type of operation as well as the 30 days postoperative morbidity and mortality
Evidence of Electron Fractionalization from Photoemission Spectra in the High Temperature Superconductors
Creators: name: Carlson, E. W.
name: Emery, V. J.
name: Kivelson, S. A.
name: Orgad, D.
name: Zhou, X. J.
Publisher: name: The American Physical Society
Year: 2001
Subjects: subject: 530

description: Physical Review Letters
The thermal and magnetic structure of the solar transition region
Creators: name: Fiedler., Russell
Publisher: name: Monash University
Year: 2021

description: This thesis was scanned from the print manuscript for digital preservation and is copyright the author.
 Researchers can access this thesis by asking their local university, institution or public library to
 make a request on their behalf. Monash staff and postgraduate students can use the link in the References field.
SPATIAL - 8th Newsletter
Creators: name: AUSTRALO
Publisher: name: Zenodo
Year: 2023

description: In the latest SPATIAL Project newsletter, we've packed some exciting content for you to explore: ✅ Dublin Consortium Meeting ✅ Educational Modules ✅ 2nd Episode of the SPATIAL Podcast ✅ SECURENET 2023 Workshop ✅ We Need Your Help Gathering Insights ✅ Meet Our Collaborators: Explore the collaborations that make SPATIAL thrive, including StandICT.eu, ARCADIAN-IoT, and SPATIAL CTF.
Βελτίωση της αδρανειακής πλοήγησης UAV με αποδοτική χρήση βαθιάς ενισχυτικής μάθησης
Creators: name: Τσιακμάκης, Δημήτριος Αγγελου
Publisher: name: Aristotle University of Thessaloniki
Year: 2022
Subjects: Ενισχυτική εκμάθηση
Μη-επανδρωμένα οχήματα
Βαθιά νευρωνικά δίκτυα
Reinforcement learning
Unmanned aerial vehicles
Deep neural networks

description: Η ρομποτική και τα μη επανδρωμένα αεροσκάφη (UAV) είναι ένα ευρύ και σημαντικό πεδίο που ερευνάται από τη μηχανική μάθηση. Τα τελευταία χρόνια, διάφορες εφαρμογές έχουν χρησιμοποιήσει UAV για να κάνουν απαιτητικές εργασίες για τους ανθρώπους. Ο εντοπισμός της θέσης του οχήματος με τη χρήση αισθητήρων αδρανειακής μονάδας μέτρησης (IMU) χαμηλού κόστους, είναι μια κρίσιμη εργασία για πολλαπλές εφαρμογές. Ωστόσο, οι αισθητήρες IMU είναι προκατειλημμένοι στις μετρήσεις τους, γεγονός που αποτελεί σημαντικό μειονέκτημα. Σε αυτή την εργασία, προτείναμε: α) μια μεθοδολογία εκπαίδευσης νευρωνικών δικτύων με χρήση δεδομένων που εξάγονται από προσομοίωση, β) μια νέα μέθοδο εύκολης επανεκπαίδευσης βασισμένη στην Ενισχυτική Μάθηση (Reinforcement Learning) η οποία απαιτείται για κάθε διαφορετικό UAV και επιτυγχάνεται χωρίς δεδομένα με βάση μια οπτική ανατροφοδότηση και τέλος, γ) μια ποικιλία μεθόδων που επιταχύνουν τη διαδικασία εκπαίδευσης. Αξιολογούμε τη μέθοδό μας τόσο σε περιβάλλον προσομοίωσης όσο και σε πραγματικό περιβάλλον
description: Robotics and Unmanned Aerial Vehicles (UAV) are a major topic that involves machine learning. In recent years, several applications have used UAVs to do tough tasks for people. Localization using low-cost Inertial Measurement Unit (IMU) sensors, it is a critical task for multiple UAV’s applications which offer an edge over other vehicles. However, IMUs are biased on their measurements which is a major drawback. In this thesis, we proposed: a) a neural network training methodology using simulation-extracted ground truth data, b) a novel Reinforcement Learning (RL)-based fine-tune method which is UAV-specific, which the training is succeed without ground truth data, based on a visual feedback and finally, c) a variety of methods that accelerate the training process. We evaluate our method both in simulation and real-life environments
Low-power photothermal self-oscillation of bimetallic nanowires
Creators: name: De Alba, Roberto
name: Abhilash, T. S.
name: Rand, Richard
name: Craighead, Harold G.
name: Parpia, Jeevak M.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We investigate the nonlinear mechanics of a bimetallic, optically absorbing SiN-Nb nanowire in the presence of incident laser light and a reflecting Si mirror. Situated in a standing wave of optical intensity and subject to photothermal forces, the nanowire undergoes self-induced oscillations at low incident light thresholds of $<1\, \rm{μW}$ due to engineered strong temperature-position ($T$-$z$) coupling. Along with inducing self-oscillation, laser light causes large changes to the mechanical resonant frequency $ω_0$ and equilibrium position $z_0$ that cannot be neglected. We present experimental results and a theoretical model for the motion under laser illumination. In the model, we solve the governing nonlinear differential equations by perturbative means to show that self-oscillation amplitude is set by the competing effects of direct $T$-$z$ coupling and $2ω_0$ parametric excitation due to $T$-$ω_0$ coupling. We then study the linearized equations of motion to show that the optimal thermal time constant $τ$ for photothermal feedback is $τ\to \infty$ rather than the widely reported $ω_0 τ= 1$. Lastly, we demonstrate photothermal quality factor ($Q$) enhancement of driven motion as a means to counteract air damping. Understanding photothermal effects on micromechanical devices, as well as nonlinear aspects of optics-based motion detection, can enable new device applications as oscillators or other electronic elements with smaller device footprints and less stringent ambient vacuum requirements.
description: New references added
Ethical Approval Form of Meta Analysis Study.pdf
Creators: name: Kazu, İbrahim Yaşar
name: Kuvvetli, Murat
Publisher: name: figshare
Year: 2025
Subjects: classificationCode: 390201
subject: Education policy
classificationCode: 390307
subject: Teacher education and professional development of educators

description: Ethical Approval Form By The Comitee of Board.
Ανάλυση συναισθήματος σε δεδομένα μέσων κοινωνικής δικτύωσης με πολιτικά φορτισμένο λόγο
Creators: name: Πατσιούρας, Εμμανουήλ Σωτηρίου
Publisher: name: Aristotle University of Thessaloniki
Year: 2022
Subjects: Ανάλυση συναισθήματος
Μέσα κοινωνικής δικτύωσης
Τεχνικές βαθιάς μάθησης
Sentiment analysis
Social media
Deep learning techniques

description: Η ταχεία ανάπτυξη και καθιέρωση των πλατφορμών κοινωνικής δικτύωσης έχει καταστήσει την ανάλυση απόψεων και συναισθημάτων ένα κρίσιμο πεδίο έρευνας, με ένα ευρύ φάσμα εφαρμογών. Σε αυτήν την εργασία, επικεντρωνόμαστε στην πλατφόρμα κοινωνικής δικτύωσης Twitter, διερευνώντας μεθόδους για τη μοντελοποίηση και την ανάλυση των συναισθημάτων μεμονωμένων tweet τα οποία έχουν περιεχόμενο που σχετίζονται με τη πολιτική. Συγκεκριμένα, εστιάζουμε σε tweets γραμμένα στην ελληνική γλώσσα, ένα θέμα που δεν έχει ερευνηθεί αρκετά, κυρίως λόγω της ανεπάρκειας δημοσίως διαθέσιμων και σωστά επισημειωμένων συνόλων δεδομένων. Για το σκοπό αυτό, παρουσιάζουμε και δημοσιεύουμε το δικό μας σύνολο δεδομένων ελληνικών πολιτικών tweets με επισημειώσεις για τέσσερα διαφορετικά συναισθήματα, δηλαδή την πολικότητα, την μεταφορικότητα, την επιθετικότητα και την μεροληψία. Μαζί με μια λεπτομερή περιγραφή του συνόλου δεδομένων, παρέχουμε μια ολοκληρωμένη πειραματική μελέτη που εστιάζει στη χρήση μοντέλων αιχμής που βασίζονται σε βαθιά μάθηση που έχουν εκπαιδευτεί και αξιολογηθεί στο εν λόγω σύνολο δεδομένων.
description: The rapid growth and establishment of on-line social media platforms has rendered opinion and sentiment analysis a critical area of research with a wide range of applications. In this work, we focus on the Twitter microblogging platform, investigating methods for modeling and analyzing the sentiments of individual tweets with political-related content. Specifically, we focus on tweets written in the Greek language, a topic rather under-researched, mainly to the inadequacy of publicly available and properly annotated datasets. To this end, we present and release our dataset of Greek political-related tweets with annotations for four different sentiments, i.e., polarity, figurativeness, aggressiveness and bias. Along with a detailed description of the dataset, we provide a comprehensive experimental study focusing on utilizing state-of-the-art deep learning-based models trained and evaluated on this dataset.
Superconducting Gap and Strong In-Plane Anisotropy in Untwinned YBa2Cu3O7delta
Creators: name: Armitage, N. P.
name: Damascelli, A.
name: Feng, D. L.
name: Lu, D. H.
name: Shen, K. M.
Publisher: name: The American Physical Society
Year: 2001
Subjects: subject: 530

description: Physical Review Letters
Mirror dark matter will be confirmed or excluded by XENON1T
Creators: name: Clarke, J. D.
name: Foot, R.
Publisher: name: arXiv
Year: 2016
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: Mirror dark matter, where dark matter resides in a hidden sector exactly isomorphic to the standard model, can be probed via direct detection experiments by both nuclear and electron recoils if the kinetic mixing interaction exists. In fact, the kinetic mixing interaction appears to be a prerequisite for consistent small scale structure: Mirror dark matter halos around spiral galaxies are dissipative - losing energy via dark photon emission. This ongoing energy loss requires a substantial energy input, which can be sourced from ordinary supernovae via kinetic mixing induced processes in the supernova's core. Astrophysical considerations thereby give a lower limit on the kinetic mixing strength, and indeed lower limits on both nuclear and electron recoil rates in direct detection experiments can be estimated. We show here that potentially all of the viable parameter space will be probed in forthcoming XENON experiments including LUX and XENON1T. Thus, we anticipate that these experiments will provide a definitive test of the mirror dark matter hypothesis.
description: about 10 pages
Scanning Tunneling Spectroscopy in MgB2
Creators: name: Crabtree, G. W.
name: Hinks, D. G.
name: Iavarone, M.
name: Karapetrov, G.
name: Kwok, W. K.
Publisher: name: The American Physical Society
Year: 2001
Subjects: subject: 530

description: Physical Review Letters
Microscopic investigations of common wombat molar enamel and the effects of a CO₂ laser on human enamel
Creators: name: Ferreira., J.M.S.G.
Publisher: name: Monash University
Year: 2021

description: This thesis was scanned from the print manuscript for digital preservation and is copyright the author.
 Researchers can access this thesis by asking their local university, institution or public library to
 make a request on their behalf. Monash staff and postgraduate students can use the link in the References field.
Οι Επιπτώσεις της Πανδημίας στην Ενεργειακή Αγορά της Ελλάδας
Creators: name: Περκατής, Βασίλειος Δημητρίου
Publisher: name: Aristotle University of Thessaloniki
Year: 2022
Subjects: Πανδημία
Ενεργειακή Αγορά
Ελλάδα
Pandemic
Energy Market
Greece

description: Στα πλαίσια του Διατμηματικού Προγράμματος Μεταπτυχιακών Σπουδών «Διοίκηση Επιχειρήσεων και Πληροφοριακά Συστήματα» των Τμημάτων Πληροφορικής και Οικονομικών Επιστημών του ΑΠΘ, θα ακολουθήσει η ανάπτυξη της διπλωματικής εργασίας με θέμα «Οι Επιπτώσεις της Πανδημίας στην Ενεργειακή Αγορά της Ελλάδας» αποσκοπώντας στην αναφορά κι επισήμανση των προβλημάτων που έχει δημιουργήσει στις ενεργειακές αγορές η εμφάνιση της πανδημίας. Αντικείμενο της εργασίας αποτελεί η υπόδειξη των αρνητικών επιδράσεων που προκάλεσε ο Covid-19, αναλύοντας κυρίως το ενεργειακό προφίλ της Ελλάδας , αλλά με αναφορές και σε διεθνές επίπεδο.
description: In the context of the Interdepartmental Master's Program "Business Administration and Information Systems" of the Departments of Informatics and Economics of the Aristotle University of Thessaloniki, the development of the thesis on "Covid-19 and its impact on the Greek Energy Market" will follow, aiming to report and highlight the problems that the pandemic has created in the energy markets. The object of the thesis is to point out the negative effects caused by Covid-19, analyzing mainly the energy profile of Greece, but with international references too.
Morphological transitions of sliding drops: Dynamics and bifurcations
Creators: name: Engelnkemper, Sebastian
name: Wilczek, Markus
name: Gurevich, Svetlana V.
name: Thiele, Uwe
Publisher: name: arXiv
Year: 2016
Subjects: subject: Fluid Dynamics (physics.flu-dyn)
subject: FOS: Physical sciences

description: We study fully three-dimensional droplets that slide down an incline by employing a thin-film equation that accounts for capillarity, wettability, and a lateral driving force in small-gradient (or long-wave) approximation. In particular, we focus on qualitative changes in the morphology and behavior of stationary sliding drops. We employ the inclination angle of the substrate as control parameter and use continuation techniques to analyze for several fixed droplet sizes the bifurcation diagram of stationary droplets, their linear stability, and relevant eigenmodes. The obtained predictions on existence ranges and instabilities are tested via direct numerical simulations that are also used to investigate a branch of time-periodic behavior (corresponding to repeated breakup-coalescence cycles, where the breakup is also denoted as pearling) which emerges at a global instability, the related hysteresis in behavior, and a period-doubling cascade. The nontrivial oscillatory behavior close to a Hopf bifurcation of drops with a finite-length tail is also studied. Finally, it is shown that the main features of the bifurcation diagram follow scaling laws over several decades of the droplet size.
When the Jeans don't fit: How stellar feedback drives stellar kinematics and complicates dynamical modeling in low-mass galaxies
Creators: name: El-Badry, Kareem
name: Wetzel, Andrew R.
name: Geha, Marla
name: Quataert, Eliot
name: Hopkins, Philip F.
name: Kereš, Dusan
name: Chan, T. K.
name: Faucher-Giguère, Claude-André
Publisher: name: arXiv
Year: 2016
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: In low-mass galaxies, stellar feedback can drive gas outflows that generate non-equilibrium fluctuations in the gravitational potential. Using cosmological zoom-in baryonic simulations from the Feedback in Realistic Environments (FIRE) project, we investigate how these fluctuations affect stellar kinematics and the reliability of Jeans dynamical modeling in low-mass galaxies. We find that stellar velocity dispersion and anisotropy profiles fluctuate significantly over the course of galaxies' starburst cycles. We therefore predict an observable correlation between star formation rate and stellar kinematics: dwarf galaxies with higher recent star formation rates should have systemically higher stellar velocity dispersions. This prediction provides an observational test of the role of stellar feedback in regulating both stellar and dark-matter densities in dwarf galaxies. We find that Jeans modeling, which treats galaxies as virialized systems in dynamical equilibrium, overestimates a galaxy's dynamical mass during periods of post-starburst gas outflow and underestimates it during periods of net inflow. Short-timescale potential fluctuations lead to typical errors of $\sim 20\%$ in dynamical mass estimates, even if full 3-dimensional stellar kinematics -- including the orbital anisotropy -- are known exactly. When orbital anisotropy is $\textit{not}$ known a priori, typical mass errors arising from non-equilibrium fluctuations in the potential are larger than those arising from the mass-anisotropy degeneracy. However, Jeans modeling alone $\textit{cannot}$ reliably constrain the orbital anisotropy, and problematically, it often favors anisotropy models that do not reflect the true profile. If galaxies completely lose their gas and cease forming stars, fluctuations in the potential subside, and Jeans modeling becomes much more reliable.
description: Accepted to ApJ with minor revisions since v1. Main results in Figures 3, 7, and 8