cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Convolutional neural networks for human activity recognition using body-worn sensors
Creators: name: Moya Rueda, Fernando
name: Grzeszick, René
name: Fink, Gernot A.
name: Feldhorst, Sascha
name: Ten Hompel, Michael
Publisher: name: Technische Universität Dortmund
Year: 2018
Subjects: subject: Human activity recognition
subject: Order picking
subject: Convolutional neural networks
subject: Multichannel time-series
subject: 620
subject: 670

description: Human activity recognition (HAR) is a classification task for recognizing human movements. Methods of HAR are of great interest as they have become tools for measuring occurrences and durations of human actions, which are the basis of smart assistive technologies and manual processes analysis. Recently, deep neural networks have been deployed for HAR in the context of activities of daily living using multichannel time-series. These time-series are acquired from body-worn devices, which are composed of different types of sensors. The deep architectures process these measurements for finding basic and complex features in human corporal movements, and for classifying them into a set of human actions. As the devices are worn at different parts of the human body, we propose a novel deep neural network for HAR. This network handles sequence measurements from different body-worn devices separately. An evaluation of the architecture is performed on three datasets, the Oportunity, Pamap2, and an industrial dataset, outperforming the state-of-the-art. In addition, different network configurations will also be evaluated. We find that applying convolutions per sensor channel and per body-worn device improves the capabilities of convolutional neural network (CNNs)
description: Informatics : Jg.: 5, Heft: 2 | S. 26-1-26-17;
Development of a constitutive model for friction in bulk metal forming
Creators: name: Lüchinger, Marco
name: Velkavrh, Igor
name: Kern, Kerstin
name: Baumgartner, Michael
name: Klien, Stefan
name: Diem, Alexander
name: Schreiner, Michael
name: Tillmann, Wolfgang
Publisher: name: Technische Universität Dortmund
Year: 2018
Subjects: subject: Friction
subject: Bulk metal forming
subject: Mathematical modeling
subject: Design of experiments
subject: Stepwise regression
subject: Akaike information criterion
subject: 620
subject: 670
subject: Reibung
subject: Blechumformen
subject: Mathematische Modellierung
subject: Versuchsplanung

description: This paper presents a systematic procedure for the development of a constitutive model of friction with focus on the application in bulk metal forming simulations. The empirically based friction model describes friction as a function of sliding distance and the most relevant friction influencing parameters. The latter were determined by means of designed experiments. An optimal friction model is obtained as a trade-off between model accuracy and complexity by using stepwise nonlinear regression and a modified version of the Akaike information criterion. Within this study, the procedure is applied to determine a friction model for tube drawing. However, the same approach can also be used for modeling friction of any other bulk metal forming process.
description: Lubricants;Jg. 6, Heft 2 | S. 42-1-42-12
Physical activity and outdoor play of children in public playground - do gender and social environment matter?
Creators: name: Reimers, Anne
name: Schoeppe, Stephanie
name: Demetriou, Yolanda
name: Knapp, Guido
Publisher: name: Technische Universität Dortmund
Year: 2018
Subjects: subject: Physical activity
subject: Gender
subject: Outdoor play
subject: Playground
subject: Children
subject: Direct observation
subject: Social environment
subject: 310

description: Background: Few studies have delved into the relationship of the social environment with children’s physical activity and outdoor play in public playgrounds by considering gender differences. The aim of the present study was to examine gender differences and the relationship of the social environment with children’s physical activity and outdoor play in public playgrounds. Methods: A quantitative, observational study was conducted at ten playgrounds in one district of a middle-sized town in Germany. The social environment, physical activity levels, and outdoor play were measured using a modified version of the System for Observing Play and Leisure Activity in Youth. Results: In total, 266 observations of children (117 girls/149 boys) between four and 12 years old were used in this analysis. Significant gender differences were found in relation to activity types, but not in moderate-to-vigorous physical activity (MVPA). The presence of active children was the main explanatory variable for MVPA. In the models stratified by gender, the presence of opposite-sex children was a significant negative predictor of MVPA in girls but not in boys. Conclusions: The presence of active children contributes to children’s physical activity levels in public playgrounds. Girls’ physical activity seems to be suppressed in the presence of boys.
description: International journal of environmental research and public health;Jg.: 15, Heft: 7 | S. 1356-1-1356-14
"СONCERTMASTER SKILLS", ANALYSIS OF PEDAGOGICAL REPERTOIRE.  (FEATURES OF THE ACCOMPANIMENT PART IN ROMANCES OF COMPOSERS OF UZBEKISTAN)
Creators: name: Emanuel, E.E.
Publisher: name: Zenodo
Year: 2024

description: The chamber and vocal creativity of composers in Uzbekistan is very diverse and multifaceted. It occupies an important place in the repertoire of modern performing musicians. In revealing the figurative structure of these works, the accompaniment part and its means of expression play a special role.
Scaling Algebras and Superselection Sectors: Study of a Class of Models
Creators: name: D'Antoni, Claudio
name: Morsella, Gerardo
Publisher: name: arXiv
Year: 2005
Subjects: subject: Mathematical Physics (math-ph)
subject: High Energy Physics - Theory (hep-th)
subject: Operator Algebras (math.OA)
subject: FOS: Physical sciences
subject: FOS: Mathematics

description: We analyse a class of quantum field theory models illustrating some of the possibilities that have emerged in the general study of the short distance properties of superselection sectors, performed in a previous paper (together with R. Verch). In particular, we show that for each pair (G, N), with G a compact Lie group and N a closed normal subgroup, there is a net of observable algebras which has (a subset of) DHR sectors in 1-1 correspondence with classes of irreducible representations of G, and such that only the sectors corresponding to representations of G/N are preserved in the scaling limit. In the way of achieving this result, we derive sufficient conditions under which the scaling limit of a tensor product theory coincides with the product of the scaling limit theories.
description: 28 pages, typos corrected, minor explanations and changes added
Η θεωρία του Akerlof για την "αγορά των λεμονιών" και οι ποικίλες επιπτώσεις της στο πεδίο των συναλλαγών
Creators: name: Κωνσταντινίδης, Χριστόδουλος
Publisher: name: Πανεπιστήμιο Πειραιώς
Year: 2020
Subjects: subject: Ασύμμετρη πληροφόρηση
subject: Συμπεριφορικά οικονομικά
subject: Ανάλυση του δικαίου

description: Η παρούσα μελέτη, η οποία εκπονήθηκε ως διπλωματική εργασία στο Μεταπτυχιακό Πρόγραμμα Δίκαιο και Οικονομία του Πανεπιστημίου Πειραιώς, ασχολείται με τα συμπεράσματα του συμπεριφορικού Οικονομολόγου George Akerlof στην κλασσική μελέτη του για την “Αγορά των Λεμονιών: Μηχανισμοί της αγοράς και Αβεβαιότητα Ποιότητας”, που δημοσίευσε το 1970 και για την οποία βραβεύτηκε με το βραβείο Νόμπελ το 2001. Ο Akerlof, διαθέτοντας πνεύμα διεισδυτικό και φανερές κοινωνικές ευαισθησίες, αναδεικνύει το φαινόμενο της ασυμμετρίας πληροφόρησης και εξετάζει τις ποικίλες επιπτώσεις του στο πεδίο των συναλλαγών, καταδεικνύοντας μέσω της οικονομικής ανάλυσης πως η πληροφοριακή ανισοσθένεια ενός εκ των συμβαλλομένων αποτελεί εκ των βασικών λόγων για την αποτυχία της αγοράς, με ακραία συνέπεια ακόμη και αυτήν την κατάρρευσή της. Διαπιστώνει ότι η κατά το δυνατόν πληρέστερη και αμερόληπτη πληροφόρηση μπορεί να επιλύσει τα προβλήματα που δημιουργούνται, θωρακίζοντας τις αγοραστικές αποφάσεις και οδηγώντας σε εμπρόθετες επιλογές που εξασφαλίζουν υγιείς πρακτικές. Όπου αυτό δεν καθίσταται δυνατόν, αναδεικνύεται η αναγκαιότητα λήψης μέτρων προς αποφυγή δυσμενών επιλογών, ενέργεια που σαφώς λειτουργεί υπέρ της προστασίας των καταναλωτικών συμφερόντων. Δικαίως λοιπόν αναγνωρίζεται η σημαντική συμβολή της εν λόγω θεωρίας στην διάπλαση της σύγχρονης νομοθεσίας προστασίας του καταναλωτή. Παραλλήλως αναδύεται ο προβληματισμός περί της κατάλληλης μορφής των επιλεκτέων ρυθμιστικών κανόνων δικαίου που κινείται μεταξύ κηδεμονισμού και της ελευθερίας της ιδιωτικής βουλήσεως η οποία αποτελεί εκ των βασικών πυλώνων του Ιδιωτικού Δικαίου. Στα πλαίσια αυτά γίνεται αναφορά στην έρευνα και τις αντίστοιχες θεωρίες της Οικονομικής Ανάλυσης του Δικαίου, με έμφαση στο πλέον σύγχρονο, ευρύτερο νομικό μεθοδολογικό ρεύμα, εκείνο της Συμπεριφορικής Οικονομικής Ανάλυσης του Δικαίου και τις πρωτότυπες και άκρως ενδιαφέρουσες προτάσεις για την καθιέρωση ενός ήπιου νομοθετικού πλαισίου, συνεπούς προς το φιλελεύθερο πνεύμα του Ιδιωτικού Δικαίου, που θα καθοδηγεί, θα διευκολύνει, χωρίς να εξαναγκάζει, την λήψη ορθολογικών αποφάσεων, συμβάλλοντας στην εξομάλυνση των συναλλακτικών σχέσεων και την αποτελεσματική και άρα καθαυτό οικονομικά αποδοτική λειτουργία της αγοράς.
Knowledge-based energy functions for computational studies of proteins
Creators: name: Li, Xiang
name: Liang, Jie
Publisher: name: arXiv
Year: 2006
Subjects: subject: Biomolecules (q-bio.BM)
subject: FOS: Biological sciences

description: This chapter discusses theoretical framework and methods for developing knowledge-based potential functions essential for protein structure prediction, protein-protein interaction, and protein sequence design. We discuss in some details about the Miyazawa-Jernigan contact statistical potential, distance-dependent statistical potentials, as well as geometric statistical potentials. We also describe a geometric model for developing both linear and non-linear potential functions by optimization. Applications of knowledge-based potential functions in protein-decoy discrimination, in protein-protein interactions, and in protein design are then described. Several issues of knowledge-based potential functions are finally discussed.
description: 57 pages, 6 figures. To be published in a book by Springer
Dynamics of volunteering and life satisfaction in midlife and old age
Creators: name: Hansen, Thomas
name: Aartsen, Marja
name: Slagsvold, Britt
name: Deindl, Christian
Publisher: name: Technische Universität Dortmund
Year: 2018
Subjects: subject: Older adults
subject: Life satisfaction
subject: 300
subject: Ehrenamt |
subject: Erwachsener | 55-85 Jahre
subject: Zufriedenheit |

description: A growing literature shows that doing voluntary work not only helps the wider community but can also improve one’s own well-being. To date, however, few studies have examined the relationship between volunteering and well-being in non-US and especially in comparative data. We study this relationship using two waves of data of 18,559 individuals aged 50 and above from 12 European countries. We analyze life satisfaction impacts of change and stability in volunteering status and in the intensity (frequency) of volunteering, and explore whether these impacts differ according to life stage (age, employment status) and across countries with different norms and supports for voluntarism. Findings show that net life satisfaction is higher among longer-term, recent, and former volunteers than among stable (long-term) non-volunteers. There are no significant life satisfaction differences between the three groups with volunteer experience. Equally, similar levels of life satisfaction are observed among people who have increased and decreased their frequency of volunteering. It thus seems to be the experience and not the dynamics (i.e., change or persistence) of volunteering that is associated with well-being. Findings further suggest life course variation in the association between volunteering and well-being, as the relationship is stronger for older and long-term non-employed (mostly retired) individuals than for their middle-aged and working counterparts. The relationship is also stronger in countries where volunteering is less common and less institutionally supported.
description: Social Sciences : Jg.: 7, Heft: 5 | S. 78-1-78-15;
Quo vadis, cold molecules? - Editorial review
Creators: name: Doyle, J.
name: Friedrich, B.
name: Krems, R. V.
name: Masnou-Seeuws, F.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Atomic Physics (physics.atom-ph)
subject: Chemical Physics (physics.chem-ph)
subject: FOS: Physical sciences

description: We give a snapshot of the rapidly developing field of ultracold polar molecules abd walk the reader through the papers appearing in this topical issue.
The relation of personality and intelligence - what can the Brunswik symmetry principle tell us?
Creators: name: Kretzschmar, André
name: Spengler, Marion
name: Schubert, Anna Lena
name: Steinmayr, Ricarda
name: Ziegler, Matthias
Publisher: name: Technische Universität Dortmund
Year: 2018
Subjects: subject: Personality
subject: Big Five
subject: Intelligence
subject: Berlin Intelligence Structure model
subject: Brunswik Symmetry
subject: Bandwidth fidelity
subject: Integrative data analysis
subject: 150
subject: Persönlichkeit |
subject: Intelligenz |

description: Personality and intelligence are defined as hierarchical constructs, ranging from broad g-factors to (domain-)specific constructs. The present study investigated whether different combinations of hierarchical levels lead to different personality-intelligence correlations. Based on the integrative data analysis approach, we combined a total of five data sets. The focus of the first study (N = 682) was an elaborated measurement of personality (NEO-PI-R), which was applied with a relatively short intelligence test (Intelligence Structure Test 2000 R). In the second study (N = 413), a comprehensive measurement of intelligence (Berlin Intelligence Structure test) was used with a shorter personality questionnaire (NEO-FFI). In line with the Brunswik symmetry principle, the findings emphasize that personality-intelligence correlations varied greatly across the hierarchical levels of constructs considered in the analysis. On average, Openness showed the largest relation with intelligence. We recommend for future studies to investigate personality-intelligence relations at more fine-grained levels based on elaborated measurements of both personality and intelligence.
description: Journal of intelligence;Jg.: 6, Heft: 3 | S. 30-1-30-38
Vortices in Bose-Einstein Condensates: Some Recent Developments
Creators: name: Kevrekidis, P. G.
name: Carretero-Gonzalez, R.
name: Frantzeskakis, D. J.
name: Kevrekidis, I. G.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Other Condensed Matter (cond-mat.other)
subject: FOS: Physical sciences

description: In this brief review we summarize a number of recent developments in the study of vortices in Bose-Einstein condensates, a topic of considerable theoretical and experimental interest in the past few years. We examine the generation of vortices by means of phase imprinting, as well as via dynamical instabilities. Their stability is subsequently examined in the presence of purely magnetic trapping, and in the combined presence of magnetic and optical trapping. We then study pairs of vortices and their interactions, illustrating a reduced description in terms of ordinary differential equations for the vortex centers. In the realm of two vortices we also consider the existence of stable dipole clusters for two-component condensates. Last but not least, we discuss mesoscopic patterns formed by vortices, the so-called vortex lattices and analyze some of their intriguing dynamical features. A number of interesting future directions are highlighted.
description: 24 pages, 8 figs, ws-mplb.cls, to appear in Modern Physics Letters B (2005)
Τεχνοοικονομική αξιολόγηση μέτρων ενεργειακής αποδοτικότητας στον οικιακό τομέα χωρών-μελών της Ευρωπαϊκής Ένωσης
Creators: name: Ναστούλης, Αθανάσιος
Publisher: name: Πανεπιστήμιο Πειραιώς
Year: 2021
Subjects: subject: Ενεργειακή ζήτηση
subject: Κτιριακός τομέας
subject: Ενεργειακή αποδοτικότητα
subject: Διαχείριση ενεργειακής ζήτησης
subject: Εξοικονόμηση ενέργειας

description: Ο κτιριακός τομέας ευθύνεται για το 40% της κατανάλωσης ενέργειας και για το 36% των εκπομπών διοξειδίου του άνθρακα (CO2) στην Ευρωπαϊκή Ένωση (Ε.Ε.). Στα πλαίσια των πρόσφατων εξελίξεων για μείωση των εκπομπών σε Ευρωπαϊκό επίπεδο, οι ενεργειακές ανακαινίσεις των κτιρίων μπορούν να συνεισφέρουν ουσιαστικά στο ευρύτερο πεδίο βελτίωσης της ενεργειακής απόδοσης, υποστηρίζοντας, έτσι, και τις ευρύτερες προσπάθειες για από-ανθρακοποίηση του ενεργειακού συστήματος μέχρι το 2030, και για κλιματική ουδετερότητα μέχρι το 2050. Ωστόσο, ακόμα και αν σε μακροπρόθεσμο ορίζοντα οι τεχνολογίες αναβάθμισης της ενεργειακής απόδοσης των κτιρίων προβλέπεται να εξοικονομήσουν ενέργεια και χρήματα, το υψηλό αρχικό κόστος επένδυσης πολλών εξ’ αυτών αποθαρρύνει συχνά τους ιδιοκτήτες, οδηγώντας τους έτσι, σε εύκολες μίκρο-παρεμβάσεις και όχι σε ριζικές ανακαινίσεις των κτιρίων. Είναι σημαντικό, λοιπόν, να ιεραρχηθούν οι πιο ενεργειακά αποδοτικές επενδύσεις, λαμβάνοντας, παράλληλα, υπόψιν και την οικονομική αποδοτικότητα μέτρων ενεργειακής αναβάθμισης τα οποία συχνά αγνοούνται λόγω του υψηλού αρχικού κόστους επένδυσης τους. Αυτή η διατριβή διερευνά τον τρόπο με τον οποίο η κατανάλωση ενέργειας και το σχετικά κόστη επηρεάζονται από τα διαφορετικά μέτρα απόδοσης που μπορούν να υιοθετηθούν για την ικανοποίηση της ενεργειακής ζήτησης σε μονοκατοικίες της ΕΕ.
The dusty MOCASSIN: fully self-consistent 3D photoionisation and dust radiative transfer models
Creators: name: Ercolano, B.
name: Barlow, M. J.
name: Storey, P. J.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We present the first 3D Monte Carlo (MC) photoionisation code to include a fully self-consistent treatment of dust radiative transfer (RT) within a photoionised region. This is the latest development (Version 2.0) of the gas-only photoionisation code MOCASSIN (Ercolano et al., 2003a), and employs a stochastic approach to the transport of radiation, allowing both the primary and secondary components of the radiation field to be treated self-consistently, whilst accounting for the scattering of radiation by dust grains mixed with the gas, as well as the absorption and emission of radiation by both the gas and the dust components. A set of rigorous benchmark tests have been carried out for dust-only spherically symmetric geometries and 2D disk configurations. MOCASSIN's results are found to be in agreement with those obtained by well established dust-only RT codes that employ various approaches to the solution of the RT problem. A model of the dust and of the photoionised gas components of the planetary nebula (PN) NGC 3918 is also presented as a means of testing the correct functioning of the RT procedures in a case where both gas and dust opacities are present. The two components are coupled via the heating of dust grains by the absorption of both UV continuum photons and resonance line photons emitted by the gas. The MOCASSIN results show agreement with those of a 1D dust and gas model of this nebula published previously, showing the reliability of the new code, which can be applied to a variety of astrophysical environments.
description: 9 pages, 3 figures
Policy Briefing: Zero Draft Text of the International Legally Binding Instrument on Plastic Pollution, Including in the Marine Environment
Creators: name: Farmer, Andrew
name: Orthodoxou, Demetra
name: Baldwin, Christina
Publisher: name: Zenodo
Year: 2023
Subjects: Plastic
United Nations
Treaty
Bioplastic
Biodegradable plastic
Plastic waste
Fishing gear
Definitions

description: The United Nations Environment Programme published a zero draft of a future UN Plastics Treaty on 4 September 2023. This briefing analyses this text and makes recommendations for improvement. The text is comprehensive in approach – aiming to set out clear objectives and addressing plastic pollution and its impacts through measures to limit production and reduce harm across the life cycle of products. The Treaty includes options for an overarching objective, and we recommend that this is kept simple and clear, but includes a need for consistency with sustainable development. The section on definitions is currently blank and we stress the importance of clear definitions and make recommendations for these. We welcome the introduction of targets to limit plastic production. This will be very challenging. The Treaty addresses alternative plastics, such as bio-based and biodegradable plastics. It is important that these reduce the harm caused by conventional plastics. The provisions on waste management are very important – on collection, reuse, recycling, transboundary movement, etc. This is a particularly problematic area and varies significantly around the world. This briefing includes specific recommendations on these issues which we hope that Parties consider in the further development of the text of this highly important UN Treaty.
Comparison of microstructure and mechanical properties of Scalmalloy® produced by selective laser melting and laser metal deposition
Creators: name: Awd, Mustafa
name: Tenkamp, Jochen
name: Hirtler, Markus
name: Siddique, Shafaqat
name: Bambach, Markus
name: Walther, Frank
Publisher: name: Technische Universität Dortmund
Year: 2017
Subjects: subject: Scalmalloy®
subject: Additive manufacturing
subject: Mechanical properties
subject: Damage mechanisms
subject: 660
subject: Rapid Prototyping
subject: Mechanische Eigenschaft
subject: Schadensmechanik
subject: Legierung

description: The second-generation aluminum-magnesium-scandium (Al-Mg-Sc) alloy, which is often referred to as Scalmalloy®, has been developed as a high-strength aluminum alloy for selective laser melting (SLM). The high-cooling rates of melt pools during SLM establishes the thermodynamic conditions for a fine-grained crack-free aluminum structure saturated with fine precipitates of the ceramic phase Al3-Sc. The precipitation allows tensile and fatigue strength of Scalmalloy® to exceed those of AlSi10Mg by ~70%. Knowledge about properties of other additive manufacturing processes with slower cooling rates is currently not available. In this study, two batches of Scalmalloy® processed by SLM and laser metal deposition (LMD) are compared regarding microstructure-induced properties. Microstructural strengthening mechanisms behind enhanced strength and ductility are investigated by scanning electron microscopy (SEM). Fatigue damage mechanisms in low-cycle (LCF) to high-cycle fatigue (HCF) are a subject of study in a combined strategy of experimental and statistical modeling for calculation of Woehler curves in the respective regimes. Modeling efforts are supported by non-destructive defect characterization in an X-ray computed tomography (µ-CT) platform. The investigations show that Scalmalloy® specimens produced by LMD are prone to extensive porosity, contrary to SLM specimens, which is translated to ~30% lower fatigue strength
description: Materials : Jg.: 11, Heft: 1 | S. 17-1-17-17;
About one singularity of the property of disturbed differential systems, that equivalents to linear differential equations
Creators: name: Kopshaev, I.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Classical Analysis and ODEs (math.CA)
subject: Dynamical Systems (math.DS)
subject: FOS: Mathematics
subject: 34D08

description: This paper is devoted to the study of the family of morphisms of vector bundle, defined by the systems equivalence to linear differential equations. It is proved, that the specified families of the morphisms of vector bundle is not saturated.
description: 8 pages
H προώθηση της πολυγλωσσίας στην πρωτοβάθμια εκπαίδευση. Μελέτη περίπτωσης: Ελληνικό Δημοτικό Σχολείο Βούπερταλ
Creators: name: Κουτρομάνου, Ειρήνη
Publisher: name: Πανεπιστήμιο Πειραιώς
Year: 2020
Subjects: subject: Πολυγλωσσία
subject: Ευρωπαϊκή Ένωση
subject: Πρωτοβάθμια εκπαίδευση
subject: Ξένες γλώσσες
subject: Ελλάδα
subject: Γερμανία

description: H πολυγλωσσία έχει καταστεί τα τελευταία χρόνια μια από τις βασικές προτεραιότητες, σε επίπεδο εκπαίδευσης, της πολιτικής της Ευρωπαϊκής Ένωσης. Η Ευρωπαϊκή Ένωση προωθεί την πολυγλωσσία στην εκπαίδευση, συμβάλλοντας στη διδασκαλία και την εκμάθηση των ξένων γλωσσών, στην ανταλλαγή των πληροφοριών και των εμπειριών. Στην εργασία γίνεται μια αναλυτική παρουσίαση των ενεργειών της Ευρωπαϊκής Ένωσης & των Ευρωπαϊκών Προγραμμάτων εκπαίδευσης που προωθούν την πολυγλωσσία καθώς και δεδομένων-στοιχείων σχετικά με την εκμάθηση των Ξένων Γλωσσών στην Ευρώπη και ειδικότερα στην Ελλάδα. Στο δεύτερο μέρος της παρούσας εργασίας, γίνεται μια αναλυτική παρουσίαση του Γερμανικού εκπαιδευτικού συστήματος ανά κρατίδιο, με εστίαση στη διδασκαλία των ξένων γλωσσών. Επιπλέον, διεξάγεται μια μελέτη περίπτωσης, της διδασκαλίας ξένων γλωσσών σε μαθητές Έ & ΄ΣΤ τάξης του Ελληνικού Δημοτικού Σχολείου Βούπερταλ, που ανήκει στο κρατίδιο « Ρηνανία Βεστφαλία».
title: Assessment of the effects of urban expansion on terrestrial carbon storage
title: a case study in Xuzhou City, China
titleType: AlternativeTitle
Creators: name: Cheng, Li
name: Zhao, Jie
name: Thinh, Nguyen Xuan
name: Xi, Yantao
Publisher: name: Technische Universität Dortmund
Year: 2018
Subjects: subject: Urban expansion
subject: Carbon storage
subject: InVEST model
subject: Cellular automata model
subject: Scenario
subject: 710
subject: Zersiedelung
subject: Stadterweiterung
subject: Carbon dioxide capture and storage
subject: Zellularer Automat

description: Carbon storage is closely connected to the productivities and climate regulation capacities of ecosystems. Assessing the effects of urban expansion on carbon storage has become increasingly important for achieving urban sustainability. This study analyzed the effects of urban expansion on terrestrial carbon storage in Xuzhou City, China during 2000–2025. The cellular automata (CA) model was developed to simulate future urban expansion under three scenarios, namely, the business as usual (BAU), ecological protection (ECO), and planning strengthened (PLS) scenarios. The Integrated Valuation of Ecosystem Services and Tradeoffs (InVEST) model was further applied to explore the consequences of urban expansion on carbon storage. The results show that urban expansion resulted in 6.099 Tg of carbon storage loss from 2000–2015. Moreover, significant differences in the effects of the urban expansion scenarios on carbon storage were identified in terms of both magnitude and spatial pattern from 2015–2025. Compared with the other scenarios, the PLS scenario could be considered as a good option that would allow future development to achieve the objectives of the lowest carbon storage losses. The findings improve the understanding of the effects of urban expansion on carbon storage and may be used to support urban planning and management.
description: Sustainability / Molecular Diversity Preservation International (MDPI);Jg. 10, Heft: 3 | S. 647-1-647-17
Statics, Dynamics and Manipulations of Bright Matter-Wave Solitons in Optical Lattices
Creators: name: Kevrekidis, P. G.
name: Frantzeskakis, D. J.
name: Carretero-Gonzalez, R.
name: Malomed, B. A.
name: Herring, G.
name: Bishop, A. R.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Other Condensed Matter (cond-mat.other)
subject: FOS: Physical sciences

description: Motivated by recent experimental achievement in the work with Bose-Einstein condensates (BECs), we consider bright matter-wave solitons, in the presence of a parabolic magnetic trap and a spatially periodic optical lattice (OL), in the attractive BEC. We examine pinned states of the soliton and their stability by means of perturbation theory. The analytical predictions are found to be in good agreement with numerical simulations. We then explore possibilities to use a time-modulated OL as a means of stopping and trapping a moving soliton, and of transferring an initially stationary soliton to a prescribed position by a moving OL. We also study the emission of radiation from the soliton moving across the combined magnetic trap and OL. We find that the soliton moves freely (without radiation) across a weak lattice, but suffers strong loss for stronger OLs.
description: 7 pages, 5 figs, Phys Rev A in Press (2005)
Application of the PAMONO-sensor for quantification of microvesicles and determination of nano-particle size distribution
Creators: name: Shpacovitch, Victoria
name: Sidorenko, Irina
name: Lenssen, Jan Eric
name: Temchura, Vladimir
name: Weichert, Frank
name: Müller, Heinrich
name: Überla, Klaus
name: Zybin, Alexander
name: Schramm, Alexander
name: Hergenröder, Roland
Publisher: name: Technische Universität Dortmund
Year: 2017
Subjects: subject: Plasmonic sensors
subject: Surface plasmon resonance
subject: Extracellular vesicles
subject: Microvesicles
subject: Machine learning
subject: Deep learning
subject: 660

description: The PAMONO-sensor (plasmon assisted microscopy of nano-objects) demonstrated an ability to detect and quantify individual viruses and virus-like particles. However, another group of biological vesicles—microvesicles (100–1000 nm)—also attracts growing interest as biomarkers of different pathologies and needs development of novel techniques for characterization. This work shows the applicability of a PAMONO-sensor for selective detection of microvesicles in aquatic samples. The sensor permits comparison of relative concentrations of microvesicles between samples. We also study a possibility of repeated use of a sensor chip after elution of the microvesicle capturing layer. Moreover, we improve the detection features of the PAMONO-sensor. The detection process utilizes novel machine learning techniques on the sensor image data to estimate particle size distributions of nano-particles in polydisperse samples. Altogether, our ﬁndings expand analytical features and the application ﬁeld of the PAMONO-sensor. They can also serve for a maturation of diagnostic tools based on the PAMONO-sensor platform.
description: Sensors;17(2)
Gravitational Model of the String
Creators: name: Dzhunushaliev, Vladimir
Publisher: name: arXiv
Year: 2005
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: It is shown that an infinite gravitational flux tube solution in 5D Kaluza-Klein gravity with the cross section in the Planck region after $5D \to 4D$ reduction and isometrical embedding in a Minkowski spacetime can be considered as a moving infinite string-like object. Such object has a flux of the electric and magnetic fields. The 4D gravitational waves on the tube are considered.
description: some changes in text
Combined estimation and optimal control of batch membrane processes
Creators: name: Jelemenský, Martin
name: Pakšiová, Daniela
name: Paulen, Radoslav
name: Latifi, Abderrazak
name: Fikar, Miroslav
Publisher: name: Technische Universität Dortmund
Year: 2016
Subjects: subject: Batch diafiltration
subject: Membrane fouling
subject: Time-optimal operation
subject: Fouling estimation
subject: 660

description: In this paper, we deal with the model-based time-optimal operation of a batch diafiltration process in the presence of membrane fouling. Membrane fouling poses one of the major problems in the field of membrane processes. We model the fouling behavior and estimate its parameters using various methods. Least-squares, least-squares with a moving horizon, recursive least-squares methods and the extended Kalman filter are applied and discussed for the estimation of the fouling behavior on-line during the process run. Model-based optimal non-linear control coupled with parameter estimation is applied in a simulation case study to show the benefits of the proposed approach.
description: Processes;4(4)
Protección de Datos Personales y Sensibles : Una Revisión de Técnicas de Encriptación en Big Data y Data Lakes
Creators: name: Aillapán, Gabriel
name: Lagos, Juan
name: Fenner, Julio
Publisher: name: Zenodo
Year: 2024
Subjects: Big Data
Data Lake
Personal Data Protection
Security
Privacy

description: This short paper presents an early version of the state of the art on encryption in Big Data and data lakes for sensitive data, which was presented at the Jornada Chilena de Computación (JCC). This work is an integral part of my thesis research, which focuses on a protocol aimed at protecting data in data lakes while preserving interoperability. Although it was not formally published, this document summarizes the main research lines and challenges in the field, providing a foundation for the subsequent chapters of my thesis.

Abstract:

The growing volume of data has led to the extensive use of Big Data technologies, such as Data Lakes. However, the protection of personal and sensitive data has become a critical challenge, driven by the need to comply with regulations such as Chilean Law N. 19.628. This paper investigates encryption techniques to safeguard data in Big Data and Data Lake environments, focusing on the applicable encryption solutions according to the Chilean legal framework. Using a systematic mapping of the literature and Design Science Research methodology, we identify the main encryption techniques, such as homomorphic encryption and AES, and propose an artifact that employs Format Preserving Encryption. This artifact allows the protection of data without compromising its readability or its original format, facilitating its secure use in distributed cloud computing platforms.
Quantum fluctuations of energy in subsystems of a hot relativistic gas
Creators: name: Das, Arpan
name: Florkowski, Wojciech
name: Ryblewski, Radoslaw
name: Singh, Rajeev
Publisher: name: arXiv
Year: 2020
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Theory (hep-th)
subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: We derive a formula that defines quantum fluctuations of energy in subsystems of a hot relativistic gas. For small subsystem sizes we find substantial increase of fluctuations compared to those known from standard thermodynamic considerations. However, if the size of the subsystem is sufficiently large, we reproduce the result for energy fluctuations in the canonical ensemble. Our results are subsequently used in the context of relativistic heavy-ion collisions to introduce limitations of the concepts such as classical energy density or fluid element. In the straightforward way, our formula can be applied in other fields of physics, wherever one deals with hot and relativistic matter.
description: 11 pages, 4 figures, Matches with the published version, Published in Acta Physica Polonica B, Vol. 52 (2021), page no: 1395-1404
Αποτίμηση ομολόγων υπό πιστοληπτική ικανότητα και στοχαστικό επιτόκιο
Creators: name: Κανακοπούλου, Ιωάννα
Publisher: name: Πανεπιστήμιο Πειραιώς
Year: 2020
Subjects: subject: Αποτίμηση εταιρικών ομολόγων
subject: Αλλαγή πιστοληπτικής διαβάθμισης
subject: Στοχαστικό επιτόκιο
subject: Αριθμητική ανάλυση
subject: Μοντέλο Vasicek
subject: Εκτίμηση παραμέτρων
subject: Μοντέλο Merton
subject: Αλγόριθμος Levenberg - Marquardt
subject: Μέθοδος πεπερασμένων διαφορών

description: Η παρούσα διπλωματική εργασία πραγματεύεται την αποτίμηση εταιρικών ομολόγων υπό πιστοληπτική ικανότητα και στοχαστικό επιτόκιο. Η αλλαγή στην πιστοληπτική διαβάθμιση γίνεται με βάση ένα προκαθορισμένο μέτρο. Η μεταβλητότητα της εταιρείας καθορίζεται από την περιοχή της πιστοληπτικής διαβάθμισης και εξαρτάται από το επιτόκιο. Αρχικά, παραθέτουμε το θεωρητικό πλαίσιο προηγούμενων μοντέλων αποτίμησης εταιρικών ομολόγων. Στη συνέχεια παρουσιάζουμε το νέο μοντέλο αποτίμησης, το οποίο διαφέρει από προηγούμενα μοντέλα, όπου η αλλαγή της πιστοληπτικής διαβάθμισης μπορεί να πραγματοποιηθεί μια φορά ή επιτρέπονται πολλαπλές αξιολογήσεις υπό σταθερό επιτόκιο. Έπειτα, πραγματοποιείται εμπειρική μελέτη με τη βοήθεια της γλώσσας προγραμματισμού MATLAB. Ειδικότερα, χρησιμοποιούμε δεδομένα της αγοράς για να εκτιμήσουμε τις παραμέτρους του μοντέλου με βάση το μοντέλο του Merton και του αλγόριθμου Levenberg-Marquardt. Τέλος, παρουσιάζεται η αριθμητική αποτίμηση του εταιρικού ομολόγου τόσο στην περίπτωση σταθερού επιτοκίου όσο και στην περίπτωση όπου το στοχαστικό επιτόκιο περιγράφεται με το μοντέλο Vasicek. Αριθμητική ανάλυση πραγματοποιείται και για την περιγραφή του συνοριακού συνόλου που προκύπτει από την αλλαγή στην πιστοληπτική διαβάθμιση του ομολόγου.
Multi-Receiver Quantum Dense Coding with Non-Symmetric Quantum Channel
Creators: name: Fu, Chang-Bao
name: Zhang, Shou
name: Li, Ke
name: Yeon, Kyu-Hwang
name: Um, Chung-In
Publisher: name: arXiv
Year: 2006
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: A two-receiver quantum dense coding scheme and an $N$-receiver quantum dense coding scheme, in the case of non-symmetric Hilbert spaces of the particles of the quantum channel, are investigated in this paper. A sender can send his messages to many receivers simultaneously. The scheme can be applied to quantum secret sharing and controlled quantum dense coding.
description: To appear in Journal of the Korean Physical Society
Enabling Open and Reproducible Science Through Community-Driven Training
Creators: name: Hodges, Toby
Publisher: name: Zenodo
Year: 2023

description: Abstract: The Carpentries is a global community teaching essential software and data skills for research. Our community of certified Instructors teaches hundreds of workshops to thousands of learners all over the world every year, introducing them to foundational skills in Research Software Engineering such as programming and version control. In recent years, the community has also begun to develop and deliver lessons that build on these foundations, teaching more intermediate and advanced RSEng skills such as HPC, parallel programming, and containerised computing. In this seminar I will talk about how The Carpentries can benefit RSEs and their local communities, and some of the ways in which you can get involved in the community.

If you wish to reuse and adapt the slides, you ar welcome to do that and can find them here as google slides :
Mapping circumstellar magnetic fields of late-type evolved stars with the Goldreich-Kylafis effect: CARMA observations at $λ1.3$ mm of R Crt and R Leo
Creators: name: Huang, K. -Y.
name: Kemball, A. J.
name: Vlemmings, W. H. T.
name: Lai, S. -P.
name: Yang, L.
name: Agudo, I.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: Mapping magnetic fields is the key to resolving what remains an unclear physical picture of circumstellar magnetic fields in late-type evolved stars. Observations of linearly polarized emission from thermal molecular line transitions due to the Goldreich-Kylafis (G-K) effect provides valuable insight into the magnetic field geometry in these sources that is complementary to other key studies. In this paper, we present the detection of spectral-line polarization from both the thermal $J=2-1$ CO line and the $v=1, J=5-4$ SiO maser line toward two thermal-pulsating (TP-) AGB stars, R Crt and R Leo. The observed fractional linear polarization in the CO emission is measured as $m_l\sim 3.1\%$ and $m_l\sim9.7\%$ for R Crt and R Leo respectively. A circumstellar envelope (CSE) model profile and the associated parameters are estimated and used as input to a more detailed modeling of the predicted linear polarization expected from the G-K effect. The observed thermal line polarization level is consistent with the predicted results from the G-K model for R Crt; additional effects need to be considered for R Leo.
A study of explorative moves during modifier adaptation with quadratic approximation
Creators: name: Gao, Weihua
name: Hernández, Reinaldo
name: Engell, Sebastian
Publisher: name: Technische Universität Dortmund
Year: 2016
Subjects: subject: Real-time optimization
subject: Modifier adaptation
subject: Quadratic approximation
subject: 660

description: Modifier adaptation with quadratic approximation (in short MAWQA) can adapt the operating condition of a process to its economic optimum by combining the use of a theoretical process model and of the collected data during process operation. The efficiency of the MAWQA algorithm can be attributed to a well-designed mechanism which ensures the improvement of the economic performance by taking necessary explorative moves. This paper gives a detailed study of the mechanism of performing explorative moves during modifier adaptation with quadratic approximation. The necessity of the explorative moves is theoretically analyzed. Simulation results for the optimization of a hydroformylation process are used to illustrate the efficiency of the MAWQA algorithm over the finite difference based modifier adaptation algorithm.
description: Processes;4(4)
Η εφαρμογή των πληροφοριακών συστημάτων στις αεροπορικές εμπορευματικές μεταφορές: μελέτη περίπτωσης FedEx
Creators: name: Αλλαντάλα, Μαρία
Publisher: name: Πανεπιστήμιο Πειραιώς
Year: 2020
Subjects: subject: ERP
subject: Αεροπορικές εμπορευματικές μεταφορές
subject: FedEx

description: Σκοπός της παρούσας πτυχιακής είναι να αναλύσει, διερευνήσει και παρουσιάσει το ακαδημαϊκό υπόβαθρο το οποίο διέπει το πλαίσιο των εμπορευματικών αεροπορικών μεταφορών. Το αεροπλάνο ως μέσο μεταφοράς είναι ιστορικά το τελευταίο το οποίο εφευρέθηκε και πολλά στάδια εξέλιξής του ακολούθησαν μέχρι αυτό να καταστεί κατάλληλο για την αξιοποίησή του στις εμπορευματικές μεταφορές. Αναλογικά δε, χαρακτηρίζεται από ιδιαίτερα μεγάλο εύρος τεχνοτροπιών και νεοτερισμών χάρη στους οποίους τα οφέλη της μεταφοράς εμπορευμάτων από αέρος κατόρθωσαν να υπερβούν το κόστος και να επιτευχθεί καθεστώς κερδοφορίας. Η μεθοδολογία που χρησιμοποιήθηκε κατά την εκπόνηση της παρούσας συνάδει με τους κανόνες του παραγωγικού λογισμού, ήτοι κινούμενοι από γενικότερες πληροφορίες τείνουμε σε ειδικότερες τοποθετήσεις και αναλύεται στα παρακάτω στάδια: • Ιστορική αναδρομή του κλάδου των αεροπορικών εμπορευματικών μεταφορών • Μνεία στις βασικών υλικοτεχνικών υποδομών και μέσων. • Ανάλυση της δομής και του θεσμικού πλαισίου του κλάδου. • Παρουσίαση των φορέων. • Εμφάνιση ποσοτικών στοιχείων και αριθμητικών δεδομένων. • Παρουσίαση της υφιστάμενης κατάστασης των εμπορευματικών μεταφορών παγκοσμίως αλλά και στο εσωτερικό. • Παράθεση ενός Case Study • Παρουσίαση των συμπερασμάτων της ανάλυσης.
Oil impregnated pressboard barrier systems based on ester fluids for an application in HVDC insulation systems
Creators: name: Rumpelt, Patrick
name: Jenau, Frank
Publisher: name: Technische Universität Dortmund
Year: 2017
Subjects: subject: Transformer
subject: Alternative insulating oils
subject: HVDC insulating system
subject: DC conductivity
subject: Pressboard
subject: Midel®7131
subject: FR3®
subject: 620
subject: Transformator
subject: Isolieröl
subject: Hochspannungsgleichstromübertragung

description: Ester-based insulation fluids are being increasingly used in high-voltage insulation systems. The reasons are the advantages in the area of ecological compatibility and resource-saving provision. The intention to use ester-based insulation fluids in high voltage direct current (HVDC) equipment is new. The major challenge in designing the HVDC insulation system is, that the systems do not only experience an alternating voltage, but also a direct voltage Offset. This presents a challenge to predict the electric field distribution. For this purpose, basic investigations are carried out in the form of conductivity investigations for various insulation barrier systems. In addition, a mineral oil serves as a reference oil for estimating existing insights. The results show the influence of the ester-based insulating liquids on the direct current (DC) conductivity for basic arrangements, consisting of pressboard barriers and mixed insulations.
description: Energies;Jg.10, Heft 12 | S. 2147-1-2147-10
Measuring Active-Sterile Neutrino Oscillations with a Stopped Pion Neutrino Source
Creators: name: Garvey, G. T.
name: Green, A.
name: Green, C.
name: Louis, W. C.
name: Mills, G. B.
name: McGregor, G.
name: Ray, H.
name: Schirato, R.
name: Van de Water, R. G.
name: White, D. H.
Publisher: name: arXiv
Year: 2005
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: The question of the existence of light sterile neutrinos is of great interest in many areas of particle physics, astrophysics, and cosmology. Furthermore, should the MiniBooNE experiment at Fermilab confirm the LSND oscillation signal, then new measurements are required to identify the mechanism responsible for these oscillations. Possibilities include sterile neutrinos, CP or CPT violation, variable mass neutrinos, Lorentz violation, and extra dimensions. In this paper, we consider an experiment at a stopped pion neutrino source to determine if active-sterile neutrino oscillations with delta-m greater than 0.1 eV2 can account for the signal. By exploiting stopped pi+ decay to produce a monoenergetic nu_mu source, and measuring the rate of the neutral current reaction nu_x + 12C -> nu_x +12C* as a function of distance from the source, we show that a convincing test for active-sterile neutrino oscillations can be performed.
description: 10 pages, 9 figures
Bottomonium suppression and elliptic flow using Heavy Quarkonium Quantum Dynamics
Creators: name: Islam, Ajaharul
name: Strickland, Michael
Publisher: name: arXiv
Year: 2020
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: We introduce a framework called Heavy Quarkonium Quantum Dynamics (HQQD) which can be used to compute the dynamical suppression of heavy quarkonia propagating in the quark-gluon plasma using real-time in-medium quantum evolution. Using HQQD we compute large sets of real-time solutions to the Schrödinger equation using a realistic in-medium complex-valued potential. We sample 2 million quarkonia wave packet trajectories and evolve them through the QGP using HQQD to obtain their survival probabilities. The computation is performed using three different HQQD model parameter sets in order to estimate our systematic uncertainty. After taking into account final state feed down we compare our results to existing experimental data for the suppression and elliptic flow of bottomonium states and find that HQQD predictions are good agreement with available data for $R_{AA}$ as a function of $N_{\rm part}$ and $p_T$ collected at $\sqrt{s_{\rm NN}} =$ 5.02 TeV. In the case of $v_2$ for the various states, we find that the path-length dependence of $Υ(1s)$ suppression results in quite small $v_2$ for $Υ(1s)$. Our prediction for the integrated elliptic flow for $Υ(1s)$ in the $10{-}90$\% centrality class, which now includes an estimate of the systematic error, is $v_2[Υ(1s)]$ = 0.003 $\pm$ 0.0007 $\pm\,^{0.0006}_{0.0013}$. We also find that, due to their increased suppression, excited bottomonium states have a larger elliptic flow. Based on this observation we make predictions for $v_2[Υ(2s)]$ and $v_2[Υ(3s)]$ as a function of centrality and transverse momentum.
description: 25 pages, 9 figure, 1 table; v2 - published version. arXiv admin note: text overlap with arXiv:2007.10211
Light Element Production in the Circumstellar Matter of Energetic Type Ic Supernovae
Creators: name: Nakamura, Ko
name: Inoue, Susumu
name: Wanajo, Shinya
name: Shigeyama, Toshikazu
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We investigate energetic type Ic supernovae as production sites for Li6 and Be in the early stages of the Milky Way. Recent observations have revealed that some very metal-poor stars with [Fe/H]
description: 12 pages, 2 figures, revised with referee suggestions, final version accepted in ApJ Letters