cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Erscheinungsformen des Grotesken in Literatur und Film am Beispiel des Romans "Die Blechtrommel" von Guenther Grass und seiner gleichnamigen Verfilmung von Volker Schloendorff:
Creators: name: Πυρινή, Μαρία Στεργίου
Publisher: name: Aristotle University of Thessaloniki
Year: 2011
Subjects: Μορφές γκροτέσκου
Λογοτεχνία
Κινηματογράφος
Forms of grotesque
Literature
Cinema

description: Σκοπός της εργασίας είναι μελέτη των διάφορων μορφών γκροτέσκου, όπως αυτές παρουσιάζονται στη λογοτεχνία και τον κινηματογράφο στο παράδειγμα του μυθιστορήματος «Το τενεκεδένιο ταμπούρλο» του γερμανού συγγραφέα Günter Grass και της ομώνυμης κινηματογραφικής ταινίας από τον σκηνοθέτη Volker Schlöndorff.
description: Τhe aim of the present thesis was the study of the different forms of grotesque, as they are presented in literature and cinema in the novel “The Tin Drum” of Günter Grass and the homonymous movie of Volker Schlöndorff.
Cardiac Arrhythmia Detection from ECG with Convolutional Recurrent Neural Networks
Creators: name: Van Zaen, Jérôme
name: Delgado-Gonzalo, Ricard
name: Lemay, Damien Ferrario Mathieu
Publisher: name: arXiv
Year: 2020
Subjects: subject: Machine Learning (cs.LG)
subject: Signal Processing (eess.SP)
subject: FOS: Computer and information sciences
subject: FOS: Electrical engineering, electronic engineering, information engineering

description: Except for a few specific types, cardiac arrhythmias are not immediately life-threatening. However, if not treated appropriately, they can cause serious complications. In particular, atrial fibrillation, which is characterized by fast and irregular heart beats, increases the risk of stroke. We propose three neural network architectures to detect abnormal rhythms from single-lead ECG signals. These architectures combine convolutional layers to extract high-level features pertinent for arrhythmia detection from sliding windows and recurrent layers to aggregate these features over signals of varying durations. We applied the neural networks to the dataset used for the challenge of Computing in Cardiology 2017 and a dataset built by joining three databases available on PhysioNet. Our architectures achieved an accuracy of 86.23% on the first dataset, similar to the winning entries of the challenge, and an accuracy of 92.02% on the second dataset.
description: 18 pages, Published in BIOSTEC 2019
Wavelength conversion through plasmon-coupled surface states
Creators: name: Turan, Deniz
name: Lu, Ping Keng
name: Yardimci, Nezih T.
name: Liu, Zhaoyu
name: Luo, Liang
name: Park, Joong-Mok
name: Nandi, Uttam
name: Wang, Jigang
name: Preu, Sascha
name: Jarrahi, Mona
Publisher: name: arXiv
Year: 2020
Subjects: subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: Surface states generally degrade semiconductor device performance by raising the charge injection barrier height, introducing localized trap states, inducing surface leakage current, and altering the electric potential. Therefore, there has been an endless effort to use various surface passivation treatments to suppress the undesirable impacts of the surface states. We show that the giant built-in electric field created by the surface states can be harnessed to enable passive wavelength conversion without utilizing any nonlinear optical phenomena. Photo-excited surface plasmons are coupled to the surface states to generate an electron gas, which is routed to a nanoantenna array through the giant electric field created by the surface states. The induced current on the nanoantennas, which contains mixing product of different optical frequency components, generates radiation at the beat frequencies of the incident photons. We utilize the unprecedented functionalities of plasmon-coupled surface states to demonstrate passive wavelength conversion of nanojoule optical pulses at a 1550 nm center wavelength to terahertz regime with record-high efficiencies that exceed nonlinear optical methods by 4-orders of magnitude. The presented scheme can be used for optical wavelength conversion to different parts of the electromagnetic spectrum ranging from microwave to infrared regimes by using appropriate optical beat frequencies.
description: Manuscript: 8 pages, 4 figures Supplementary materials: 21 pages, 11 figures
Routing Approach for P2P Systems Over MANET Network
Creators: name: Hamad, Sofian
name: Yeferny, Taoufik
Publisher: name: arXiv
Year: 2021
Subjects: subject: Networking and Internet Architecture (cs.NI)
subject: Operating Systems (cs.OS)
subject: FOS: Computer and information sciences

description: Thanks to the great progress in mobile and wireless technologies, Internet-distributed applications like P2P file sharing are nowadays deployed over MANET (i.e., P2P mobile systems). These applications allow users to search and share diverse multimedia resources over MANET. Due the nature of MANET, P2P mobile systems brought up many new thriving challenges regarding the query routing issue. To tackle this problem, we introduce a novel context-aware query routing protocol for unstructured P2P mobile file sharing systems. Our protocol (i) locates relevant peers sharing pertinent resources for user's query and (ii) ensures that those peers would be reached by considering different MANET constraints (e.g., query content, peer mobility, battery energy, peer load). In order to consider all these constraints for choosing the relevant peers, we are based on the technique for order preferences by similarity to ideal solution (TOPSIS). We implemented the proposed protocol and compared its routing efficiency and retrieval effectiveness with another protocol taken from the literature. Experimental results show that our scheme carries out better than the baseline protocol with respect to accuracy
Direct evidence of void induced structural relaxations in colloidal glass formers
Creators: name: Yip, Cho-Tung
name: Isobe, Masaharu
name: Chan, Chor-Hoi
name: Ren, Simiao
name: Wong, Kin-Ping
name: Huo, Qingxiao
name: Lee, Chun-Sing
name: Tsang, Yuen-Hong
name: Han, Yilong
name: Lam, Chi-Hang
Publisher: name: arXiv
Year: 2020
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Particle dynamics in supercooled liquids are often dominated by string-like motions in which lines of particles perform activated hops cooperatively. The structural features triggering these motions, crucial in understanding glassy dynamics, remain highly controversial. We experimentally study microscopic particle dynamics in colloidal glass formers at high packing fractions. With a small polydispersity leading to glass-crystal coexistence, a void in the form of a vacancy in the crystal can diffuse reversibly into the glass and further induces string-like motions. In the glass, a void takes the form of a quasi-void consisting of a few neighboring free volumes and is transported by the string-like motions it induces. In fully glassy systems with a large polydispersity, similar quasi-void actions are observed. The mobile particles cluster into string-like or compact geometries, but the compact ones can further be broken down into connected sequences of strings, establishing their general importance.
description: main text 5 pages 4 figures + supplymentary material 24 pages 23 figures (Ancillary files), 2020 Nov accepted by Physical Review Letter
One-dimensional van der Waals heterojunction diode
Creators: name: Feng, Ya
name: Li, Henan
name: Inoue, Taiki
name: Chiashi, Shohei
name: Rotkin, Slava V.
name: Xiang, Rong
name: Maruyama, Shigeo
Publisher: name: arXiv
Year: 2020
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: The synthesis of one-dimensional van der Waals heterostructures was realized recently, which opens up new possibilities for prospective applications in electronics and optoelectronics. The even reduced dimension will enable novel properties and further miniaturization beyond the capabilities of its two-dimensional counterparts have revealed. The natural doping results in p-type electrical characteristics for semiconducting single-walled carbon nanotubes, while n-type for molybdenum disulfide with conventional noble metal contacts. Therefore, we demonstrate here a one-dimensional heterostructure nanotube of 11-nm-wide, with the coaxial assembly of semiconducting single-walled carbon nanotube, insulating boron nitride nanotube, and semiconducting molybdenum disulfide nanotube which induces a radial semiconductor-insulator-semiconductor heterojunction. When opposite potential polarity was applied on semiconducting single-walled carbon nanotube and molybdenum disulfide nanotube, respectively, the rectifying effect was materialized.
description: 29 pages, 6 figures
Οι μεταβολές στο διεθνές οικονομικό περιβάλλον και οι επιπτώσεις τους στη ζήτηση τροφίμων:
Creators: name: Χούσου, Χαρούλα Ελευθερίου
Publisher: name: Aristotle University of Thessaloniki
Year: 2011
Subjects: Οικονομική κρίση
Κατανάλωση
Τρόφιμα
Ελλάδα
Crisis
Consumption
Food
Greece

description: Σκοπός της παρούσας εργασίας είναι η διερεύνηση των αλλαγών στις αγοραστικές συνήθειες των καταναλωτών ενόψει οικονομικής κρίση καθώς και διερεύνηση του τρόπου με τον οποίο διαχειρίζονται τα χρήματά τους. Παράλληλα, γίνεται μια προσπάθεια να διερευνηθούν οι επιπτώσεις της οικονομικής κρίσης στα επίπεδα κατανάλωσης σε συγκεκριμένες κατηγορίες ποτών και τροφίμων. Η εργασία βασίζεται σε πρωτογενή δεδομένα, τα οποία συλλέχθηκαν μέσω προσωπικών συνεντεύξεων. Το χρονικό διάστημα διεξαγωγής της έρευνας ήταν από τον Οκτώβριο έως τον Νοέμβριο του 2010, ενώ ο τόπος διεξαγωγής ήταν το πολεοδομικό συγκρότημα της Θεσσαλονίκης. Το δείγμα της έρευνας αποτελείται από 200 πλήρως συμπληρωμένα ερωτηματολόγια. Για την εκτίμηση των αποτελεσμάτων χρησιμοποιήθηκε η περιγραφική στατιστική ανάλυση, καθώς και το οικονομετρικό υπόδειγμα binary logistic. Βάση των αποτελεσμάτων της έρευνας, το φύλο, η ηλικία, η οικογενειακή κατάσταση των καταναλωτών, το επίπεδο εκπαίδευσης, το επάγγελμα, το μηνιαίο οικογενειακό εισόδημα, το ποσό που δαπανάται εβδομαδιαίως για τρόφιμα, η ύπαρξη παιδιών στη σύνθεση του νοικοκυριού, η διαφήμιση και ορισμένες τοποθεσίες από τις οποίες οι καταναλωτές προμηθεύονται τρόφιμα επηρεάζουν άλλοτε θετικά και άλλοτε αρνητικά την απόφαση των καταναλωτών να μεταβάλλουν ή μη την κατανάλωση προϊόντων με τα οποία καλύπτουν βασικές ανάγκες διατροφής.
description: The purpose of this study is to investigate the changes of consumers buying habits in Greece and to explore how they manage their money in view of current economic crisis. Moreover, we attempt to investigate the impact of economic crisis on levels of consumption in specific types of beverages and foods. The study is based on primary data, collected through personal interviews. The period of the survey was from October to November 2010, while the city in which the survey took place was Thessaloniki. The sample consists of 200 fully completed questionnaires. To assess the result we used the descriptive statistical analysis and the econometric model of binary logistic. Based on the result of survey, the gender, the age, the marital status of consumer, the educational level, the occupation, the monthly family income, the amount spend per week on food, the presence of children in household composition, the advertising and the sites from which consumers purchase foods influence positive or negative the decision of consumer to change or not the consumption of products which cover basic nutritional needs.
Teaming up in collaborative ethnographic research
Creators: name: Niks, Marina Ines
Publisher: name: University of British Columbia
Year: 2009

description: In this thesis I explore the relationships in a collaborative research team and how the team approach influenced research tasks and results. To do this analysis I draw from my experience as a team member in an ethnographic evaluation of two exemplary adult education programs. The research team's meeting tapes were used as the major source of data. Through an analysis of the audio taped conversations and discussions I reconstructed the collaborative relationships that were established in the research team. As a result of this analysis, I argue that collaboration i s not a given; research teams become more collaborative during the shared work. Collaboration is a vision, an ideal that guides the team in building relationships and working together. This ideal is influenced by contextual factors - purpose, settings, skills , time, and confidentiality. To describe the concept of collaboration in a concrete manner, I present a characterization of roles and responsibilities in the team and how those changed at different stages in the research. I conclude that doing team research is different from more traditional approaches to research. Basically, reflexivity - a constant and rigorous scrutiny of methodology, researcher, and context - changes when traditionally private spaces, such as fieldnotes, become public. Collaborative team building can be supported by 1)creating a space for each fieldworker to reflect privately; 2)regarding research team meetings as collective reflections where the team makes sense of the data; 3)making provisions to acknowledge team meetings as data by taping and transcribing the meetings, and connecting the transcripts to other sources of data; 4)creating structures that build on people's strength and trust in each other, and giving continuous feedback to researchers; and 5)evaluating the advantages and disadvantages of including liaison researchers, and making provisions for that inclusion (or exclusion). My main conclusion is that deciding to do collaborative team research is not simply doing research by existing methods with more people. It is a different methodology. Therefore, if one embarks on a team research project, one needs to acknowledge the peculiarities of the approach and take advantage of the benefits of a group working together, otherwise it is not collaborative, and it is not team research.
Produit eulérien motivique et courbes rationnelles sur les variétés toriques
Creators: name: Bourqui, David
Publisher: name: arXiv
Year: 2006
Subjects: subject: Number Theory (math.NT)
subject: Algebraic Geometry (math.AG)
subject: FOS: Mathematics
subject: 11G50, 14M25, 12E30, 14C05, 11M41

description: We study the asymptotical behaviour of the moduli space of morphisms of given anticanonical degree from a rational curve to a split toric variety, when the degree goes to infinity. We obtain in this case a geometric analogue of Manin's conjecture about rational points of bounded height on varieties defined over a global field. The study is led through a generating series whose coefficients lie in a Grothendieck ring of motives, the motivic height zeta function. In order to establish convergence properties of this function, we use a notion of eulerian motivic product. It relies on a construction of Denef and Loeser which associates a virtual motive to a first order logic ring formula.
title: At the Confluence of the Two Seas: On the Ontological Difference of Images
Creators: name: Villa, Riccardo Matteo
Publisher: name: TU Wien
Year: 2019
Subjects: subject: Philosophy
subject: FOS: Philosophy, ethics and religion
subject: Epistemology
subject: Architecture
subject: FOS: Civil engineering
subject: Gardens
subject: Political Theology
subject: Eschatology
subject: Hans Blumenberg
subject: Mundus Imaginalis
subject: Henry Corbin
subject: Architecture Theory
subject: Technics
subject: Architectonics
subject: Ontological Difference
subject: Gilles Clément

description: Manuscript of the paper presented at the Sophistication Conference 2019, “Copia and Copiousness”, 14-16 November 2019, TU Wien, Panel 2: “All, and then Some”.
description: If modernity was supposed to be the age in which world-images were abrogated or discredited as world-views, or as ideologies to be critiqued and deconstructed, our contemporary condition seems to be faced with an unexpected reappearance of images and of their importance for orienting our values. Instead of coming from mythology, theology or philosophy, these "world-pictures" are rather 'renderings' and 'accounts' of scientific models; by conceiving and studying their subject as a closed environment-as an oikos, a 'house'-disciplines like economy and ecology are able to project their own picture of the world. Yet, such pictures become normative (they acquire the power to legitimate policies) only when they are pushed to their own limit; in other words, these pictures become images whenever they stage the crisis of their own model. But is this phenomena limited to the contemporary condition and to its presumedly singular 'criticality', or is it rather pertaining to 'human' orders and to 'artificial' techniques at large? Looking at the interplay between images and crisis might open up a field of perspectives able, if not to escape, at least to rethink any apocalyptic prophecy, for how 'scientific' its base might be.
Probing unexplored territories with MUSE: a second generation instrument for the VLT
Creators: name: Bacon, R.
name: Bauer, S.
name: Boehm, P.
name: Boudon, D.
name: Brau-Nogue, S.
name: Caillier, P.
name: Capoani, L.
name: Carollo, C. M.
name: Champavert, N.
name: Contini, T.
name: Daguise, E.
name: Dalle, D.
name: Delabre, B.
name: Devriendt, J.
name: Dreizler, S.
name: Dubois, J.
name: Dupieux, M.
name: Dupin, J. P.
name: Emsellem, E.
name: Ferruit, P.
name: Franx, M.
name: Gallou, G.
name: Gerssen, J.
name: Guiderdoni, B.
name: Hahn, T.
name: Hofmann, D.
name: Jarno, A.
name: Kelz, A.
name: Koehler, C.
name: Kollatschny, W.
name: Kosmalski, J.
name: Laurent, F.
name: Lilly, S. J.
name: Lizon, J.
name: Loupias, M.
name: Lynn, S.
name: Manescau, A.
name: McDermid, R. M.
name: Monstein, C.
name: Nicklas, H.
name: Pares, L.
name: Pasquini, L.
name: Pecontal-Rousset, A.
name: Pecontal, E.
name: Pello, R.
name: Petit, C.
name: Picat, J. -P.
name: Popow, E.
name: Quirrenbach, A.
name: Reiss, R.
name: Renault, E.
name: Roth, M.
name: Schaye, J.
name: Soucail, G.
name: Steinmetz, M.
name: Stroebele, S.
name: Stuik, R.
name: Weilbacher, P.
name: Wozniak, H.
name: de Zeeuw, P. T.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: The Multi Unit Spectroscopic Explorer (MUSE) is a second-generation VLT panoramic integral-field spectrograph under preliminary design study. MUSE has a field of 1x1 arcmin**2 sampled at 0.2x0.2 arcsec**2 and is assisted by the VLT ground layer adaptive optics ESO facility using four laser guide stars. The simultaneous spectral range is 465-930 nm, at a resolution of R~3000. MUSE couples the discovery potential of a large imaging device to the measuring capabilities of a high-quality spectrograph, while taking advantage of the increased spatial resolution provided by adaptive optics. This makes MUSE a unique and tremendously powerful instrument for discovering and characterizing objects that lie beyond the reach of even the deepest imaging surveys. MUSE has also a high spatial resolution mode with 7.5x7.5 arcsec**2 field of view sampled at 25 milli-arcsec. In this mode MUSE should be able to obtain diffraction limited data-cubes in the 600-930 nm wavelength range. Although the MUSE design has been optimized for the study of galaxy formation and evolution, it has a wide range of possible applications; e.g. monitoring of outer planets atmosphere, environment of young stellar objects, super massive black holes and active nuclei in nearby galaxies or massive spectroscopic surveys of stellar fields in the Milky Way and nearby galaxies.
description: Astronomical Telescopes and Instrumentation, SPIE 6265 Orlando 24-31May 2006 9 pages
dPOLY: Deep Learning of Polymer Phases and Phase Transition
Creators: name: Bhattacharya, Debjyoti
name: Patra, Tarak K
Publisher: name: arXiv
Year: 2020
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Machine learning (ML) and artificial intelligence (AI) have the remarkable ability to classify, recognize, and characterize complex patterns and trends in large data sets. Here, we adopt a subclass of machine learning methods viz., deep learnings and develop a general-purpose AI tool - dPOLY for analyzing molecular dynamics trajectory and predicting phases and phase transitions in polymers. An unsupervised deep neural network is used within this framework to map a molecular dynamics trajectory undergoing thermophysical treatment such as cooling, heating, drying, or compression to a lower dimension. A supervised deep neural network is subsequently developed based on the lower dimensional data to characterize the phases and phase transition. As a proof of concept, we employ this framework to study coil to globule transition of a model polymer system. We conduct coarse-grained molecular dynamics simulations to collect molecular dynamics trajectories of a single polymer chain over a wide range of temperatures and use dPOLY framework to predict polymer phases. The dPOLY framework accurately predicts the critical temperatures for the coil to globule transition for a wide range of polymer sizes. This method is generic and can be extended to capture various other phase transitions and dynamical crossovers in polymers and other soft materials.
Ζητήματα από την ΑΚ 177:
Creators: name: Βαγενά, Αθηνά Αλεξάνδρου
Publisher: name: Aristotle University of Thessaloniki
Year: 2011
Subjects: Εξουσία διαθέσεως
Προληπτική αξίωση προς παράλειψη
Ασφαλιστικά μέτρα
Disposal authority
Presentive claim for omission
Security measures

description: Στην παρούσα εργασία θα καταβληθεί προσπάθεια να διερευνηθεί η δυνατότητα προστασίας του δανειστή μέσω της άσκησης προληπτικής αξίωσης προς παράλειψη και, ειδικότερα, διά της διαδικασίας των ασφαλιστικών μέτρων. Στο ίδιο πλαίσιο θα διερευνηθεί, με αναφορά και στην πρόσφατη νομολογία, η δυνατότητα επίτευξης της προστασίας του δανειστή μέσω της αίτησης προς έκδοση προσωρινής διαταγής κατά τη διάρκεια της εκκρεμοδικίας της αίτησης ασφαλιστικών μέτρων. Περαιτέρω, θα ερευνηθεί η δυνατότητα προστασίας του δανειστή μέσω της προσθήκης διαλυτικής αίρεσης στη δικαιοπραξία της ΑΚ 177 και θα αναλυθούν -κατά το δυνατόν- οι αντιμαχόμενες απόψεις της θεωρίας σχετικά με την «εμπραγματοποίηση» του ενοχικού δικαιώματος μέσω των ως άνω δυνατοτήτων. Τέλος, θα εξεταστεί το ζήτημα της δυνατότητας «εμπράγματης» προστασίας του δανειστή μη χρηματικών απαιτήσεων και, ειδικότερα, αφενός του εκ προσυμφώνου δανειστή και αφετέρου του δικαιούχου από σύμφωνο προαίρεσης, στο πλαίσιο της άσκησης παυλιανής αγωγής. Των παραπάνω αναλύσεων θα προηγηθεί αναφορά στην έννοια της διάθεσης γενικά, καθώς και στο αντικείμενό της, στην έννοια της εξουσίας διαθέσεως, αλλά και στις απαγορεύσεις διάθεσης από το νόμο, από δικαστική απόφαση και από δικαιοπραξία, προκειμένου να επιτευχθεί μία ομαλή σύνδεση με το ζήτημα της προστασίας του δανειστή μέσω των ως άνω δυνατοτήτων.
description: At the present work it will be attempted that the possibility of creditor’s protection is investigated through the practice of preventive claim for omission and more especially through the proceedings of security measures. At the same frame,it will be investigated, with reference to the recent jurisprudence too, the possibility of attainment of the creditor’s protection through the petition for issue of a provisional order during the pendency of the petition of security measures. Further , it will be investigated the possibility of creditor’s protection through the addition of a resolutory condition at the transaction of 177 of Civil Code and the opposed aspects of the theory relatively with the conversion of the contractual right into a real right through the above possibilities will be analyzed- as much as possible. Finally, the matter of the possibility of ‘real’protection of the creditor of not pecuniary claims and especially of the creditor from a binder and of the beneficiary from a precondition-agreement will be investigated at the frame of bringing a Pauline action. The reference to the disposal-conception, in general, will precede of the above analysis, as well as at its object, at the conception of disposal-authority, but to the disposal-prohibitions by the law too, by a judicial judgment and transaction, so that a smooth connection is attained with the matter of creditor’s protection through the above possibilities.
Access all areas: a backstage look at women’s experiences in the West Coast rock music scene
Creators: name: Hammond, Leanne
Publisher: name: University of British Columbia
Year: 2009

description: This study attempts to address a gap in existing subcultural research. While there has been extensive work done on the experiences of men in subcultural groupings, the examination of women's experiences is sadly lacking. Using a combination of participant observation and ethnographic interviewing, this study looks at the role women play in the local rock music scene. Some interesting themes emerge that challenge existing notions that women are either marginal or absent from subcultural activity. Women in the scene occupy a richly contradictory social position. While they exercise an impressive degree of sexual and financial autonomy, as illustrated by their initiation of relationships and breadwinner roles in partnerships with male musicians, they also adopt many goals and behaviors typically associated with mainstream constructions of proper femininty. Women in the rock scene are seldom performers, instead they are concentrated i n the role of the "nurturent caretaker" (Cole 1993: 89/90) allowing the male musicians to retain recognition, prestige and power in the scene. This construction of the male role as central reflects the acceptance of patriarchal ideology in the scene and obscures the contribution of women to the material maintenance of the subculture. Women's roles in the scene can be characterized as a simultaneous acceptance and rejection of mainstream prescriptions for feminine behavior. While women in the rock scene are undeniably the focus of much sexual objectification and exploitation, they cannot be viewed as either passive or dependent. Women are described by scene members as sexually powerful decision makers, and although women's power is cast in disappointingly sexual terms, it is the active nature of this sexuality that leads me to describe women not as "passive" sexual objects, but rather as "active" sexual objects. Women's experiences in the rock scene are inextricably linked to heterosexual relations with male musicians. While rock women focus on the same goals of marriage and motherhood as mainstream women, their relationships are characterized by complications imposed by the rock lifestyle. According female participants, the overt sexuality of the scene, lack of financial stability , and the consuming nature of the music business combine to challenge the maintenance of a healthy relationship with a musician. However, while women's willingness to deal with such obstacles is puzzling, it can be seen as determination to transcend traditional limitations on masculine and feminine roles. The rock scene, despite its disproportionate consequences for women, offers both women and men alternatives to mainstream constructions of masculinity and femininity. The scene is identified by both female and male participants as offering excitement, spontaneity and passion absent in mainstream society.
Power-law energy distributions of small-scale impulsive events on the active Sun: Results from IRIS
Creators: name: Nhalil, Nived Vilangot
name: Nelson, Chris J.
name: Mathioudakis, Mihalis
name: Doyle, J. Gerry
name: Ramsay, Gavin
Publisher: name: arXiv
Year: 2020
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: Numerous studies have analysed inferred power-law distributions between frequency and energy of impulsive events in the outer solar atmosphere in an attempt to understand the predominant energy supply mechanism in the corona. Here, we apply a burst detection algorithm to high-resolution imaging data obtained by the Interface Region Imaging Spectrograph to further investigate the derived power-law index, $γ$, of bright impulsive events in the transition region. Applying the algorithm with a constant minimum event lifetime (of either $60$ s or $110$ s) indicated that the target under investigation, such as Plage and Sunspot, has an influence on the observed power-law index. For regions dominated by sunspots, we always find $γ<2$; however, for datasets where the target is a plage region, we often find that $γ>2$ in the energy range [$\sim10^{23}$, $\sim10^{26}$] erg. Applying the algorithm with a minimum event lifetime of three timesteps indicated that cadence was another important factor, with the highest cadence datasets returning $γ>2$ values. The estimated total radiative power obtained for the observed energy distributions is typically 10-25 % of what would be required to sustain the corona indicating that impulsive events in this energy range are not sufficient to solve coronal heating. If we were to extend the power-law distribution down to an energy of $10^{21}$ erg, and assume parity between radiative energy release and the deposition of thermal energy, then such bursts could provide 25-50 % of the required energy to account for the coronal heating problem.
Euclidean LQG Dynamics: An Electric Shift in Perspective
Creators: name: Varadarajan, Madhavan
Publisher: name: arXiv
Year: 2021
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: Loop Quantum Gravity (LQG) is a non-perturbative attempt at quantization of a classical phase space description of gravity in terms of $SU(2)$ connections and electric fields. As emphasized recently [1], on this phase space, classical gravitational evolution in $time$ can be understood in terms of certain gauge covariant generalizations of Lie derivatives with respect to a $spatial$ $SU(2)$ Lie algebra valued vector field called the Electric Shift. We present a derivation of a quantum dynamics for Euclidean LQG which is informed by this understanding. In addition to the physically motivated nature of the action of the Euclidean Hamiltonian constraint so derived, the derivation implies that the spin labels of regulating holonomies are determined by corresponding labels of the spin network state being acted upon thus eliminating the `spin $j$-ambiguity' pointed out by Perez. By virtue of Thiemann's seminal work, the Euclidean quantum dynamics plays a crucial role in the construction of the Lorentzian quantum dynamics so that our considerations also have application to Lorentzian LQG.
description: 37 pages, 7 figures
Conversational initiations and responses in kindergarten by a blind child and his sighted identical twin
Creators: name: Huyghebaert, Danine Andrea
Publisher: name: University of British Columbia
Year: 2009

description: The current study compares the conversational turns of identical twin boys, one of whom is blind. Previous research regarding the conversational interactions of children who are blind suggests an emergence of conversational initiation and maintenance strategies different from those of sighted children. This literature focuses on child-adult dyads; there is little information about the conversational interactions between blind children and their peers. Comparison of B's conversational skills with those of his sighted identical twin provides a unique research opportunity, as individual differences among children on such measures are so great that it is difficult to determine what differences should be attributed to the lack of vision per se. The case of comparing identical twins is as well controlled a study as is possible. The twins' conversational turns and utterances were transcribed from audio-videotapes of the twins interacting with peers in their kindergarten classroom and then coded for discourse categories relevant to initiations and responses. Discourse categories were analysed for each child at three different time periods over the year: (a) ages 4 years 11 months (4; 11) and 5;0, (b) 5;3 and 5;4, and (c) 5;6. Results indicate that although the number of interactions each twin attempted to initiate was similar, B devoted proportionally almost twice as many turns to initiation than did G. This difference seems to be related to the findings that 1) less than half of B's initiations gained a response; 2) B persisted for a greater number of turns than G after an initial bid failed, due to repeated failed attempts; and 3) B used a large proportion of nonspecific and nonroutinized attention-getting devices, as well as simply relying on the addressee's proximity in the nonverbal domain. The results are consistent with reports that blind children have difficulty initiating conversational interaction (Dunlea, 1989; Kekelis & Andersen, 1984; Mulford, 1983; Rowland, 1983). Due to the single-subject design of this study, additional research is needed to advance us further toward being able to definitively answer the question of why this difficulty occurs and perhaps offer explanations of how it may be resolved.
Swift Highly Charged Ion Channelling
Creators: name: Dauvergne, D.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Atomic Physics (physics.atom-ph)
subject: FOS: Physical sciences

description: We review recent experimental and theoretical progress made in the scope of swift highly charged ion channelling in crystals. The usefulness of such studies is their ability to yield impact parameter information on charge transfer processes, and also on some time related problems. We discuss the cooling and heating phenomena at MeV/u energies, results obtained with decelerated H-like ion beams at GSI and with ions having an excess of electrons at GANIL, the superdensity effect along atomic strings and Resonant Coherent Excitation.
description: to be published in Journal of Physics B
Spin-dependent processes at the crystalline Si-SiO_2 interface at high magnetic fields
Creators: name: McCamey, D. R.
name: Morley, G. W.
name: Seipel, H. A.
name: Brunel, L. C.
name: van Tol, J.
name: Boehme, C.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Other Condensed Matter (cond-mat.other)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: An experimental study on the nature of spin-dependent excess charge carrier transitions at the interface between (111) oriented phosphorous doped ([P] ~ 10^15 cm^3) crystalline silicon and silicon dioxide at high magnetic field (B_0 ~ 8.5 T) is presented. Electrically detected magnetic resonance (EDMR) spectra of the hyperfine split 31P donor electron transitions and paramagnetic interface defects were conducted at temperatures in the range 3 K < T < 12 K. The results at these previously unattained (for EDMR) magnetic field strengths reveal the dominance of spin-dependent processes that differ from the previously well investigated recombination between the 31P donor and the P_b state, which dominates at low magnetic fields. While magnetic resonant current responses due to 31P and P_b states are still present, they do not correlate and only the P_b contribution can be associated with an interface process due to spin-dependent tunneling between energetically and physically adjacent P_b states. This work provides an experimental demonstration of spin-dependent tunneling between physically adjacent and identical electronic states as proposed by Kane for readout of donor qubits.
description: 10 pages, 4 figures
Optimal noise estimation from syndrome statistics of quantum codes
Creators: name: Wagner, Thomas
name: Kampermann, Hermann
name: Bruß, Dagmar
name: Kliesch, Martin
Publisher: name: arXiv
Year: 2020
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Quantum error correction allows to actively correct errors occurring in a quantum computation when the noise is weak enough. To make this error correction competitive information about the specific noise is required. Traditionally, this information is obtained by benchmarking the device before operation. We address the question of what can be learned from only the measurements done during decoding. Such estimation of noise models was proposed for surface codes, exploiting their special structure, and in the limit of low error rates also for other codes. However, so far it has been unclear under what general conditions noise models can be estimated from the syndrome measurements. In this work, we derive a general condition for identifiability of the error rates. For general stabilizer codes, we prove identifiability under the assumption that the rates are small enough. Without this assumption we prove a result for perfect codes. Finally, we propose a practical estimation method with linear runtime for concatenated codes. We demonstrate that it outperforms other recently proposed methods and that the estimation is optimal in the sense that it reaches the Cramér-Rao Bound. Our method paves the way for practical calibration of error corrected quantum devices during operation.
description: 20 pages, 8 figures; Fixed typo in abstract
Does external medical review reduce disability insurance inflow?
Creators: name: Liebert, Helge
Publisher: name: arXiv
Year: 2021
Subjects: subject: General Economics (econ.GN)
subject: FOS: Economics and business

description: This paper investigates the effects of introducing external medical review for disability insurance (DI) in a system relying on treating physician testimony for eligibility determination. Using a unique policy change and administrative data from Switzerland, I show that medical review reduces DI incidence by 23%. Incidence reductions are closely tied to difficult-to-diagnose conditions, suggesting inaccurate assessments by treating physicians. Due to a partial benefit system, reductions in full benefit awards are partly offset by increases in partial benefits. More intense screening also increases labor market participation. Existing benefit recipients are downgraded and lose part of their benefit income when scheduled medical reviews occur. Back-of-the-envelope calculations indicate that external medical review is highly cost-effective. Under additional assumptions, the results provide a lower bound of the effect on the false positive award error rate.
Heat-capacity measurements under uniaxial pressure using a piezo-driven device
Creators: name: Li, Y. -S.
name: Borth, R.
name: Hicks, C. W.
name: Mackenzie, A. P.
name: Nicklas, M.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: Materials Science (cond-mat.mtrl-sci)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We report the development of a technique to measure heat capacity at large uniaxial pressure using a piezoelectric-driven device generating compressive and tensile strain in the sample. Our setup is optimized for temperatures ranging from 8 K down to millikelvin. Using an AC heat-capacity technique we are able to achieve an extremely high resolution and to probe a homogeneously strained part of the sample. We demonstrate the capabilities of our setup on the unconventional superconductor Sr$_2$RuO$_4$. By replacing thermometer and adjusting the remaining setup accordingly the temperature regime of the experiment can be adapted to other temperature ranges of interest.
description: This manuscript is an extended version of the experimental methods part of arXiv:1906.07597, which is being split into two separate papers
Micmac documented oral accounts as historical source material
Creators: name: McKeen, Scott Hector
Publisher: name: University of British Columbia
Year: 2009

description: This is a study of the documented oral accounts of the Micmac people of Atlantic Canada for their potential as historical source material. William G. Doty's perspectives on mythography are adapted into an historical-functional approach to stories in the accounts. Consideration is given to the nature and history of the oral accounts, how they came to be recorded, and role of t he recorders in shaping the accounts. Finally, a sample of the documented accounts are analyzed for evidence of change in Micmac spirituality and religious beliefs from contact in the seventeenth century to the mid-twentieth century.
Solar wind energy flux observations in the inner heliosphere: First results from Parker Solar Probe
Creators: name: Liu, M.
name: Issautier, K.
name: Meyer-Vernet, N.
name: Moncuquet, M.
name: Maksimovic, M.
name: Halekas, J. S.
name: Huang, J.
name: Griton, L.
name: Bale, S.
name: Bonnell, J. W.
name: Case, A. W.
name: Goetz, K.
name: Harvey, P. R.
name: Kasper, J. C.
name: MacDowall, R. J.
name: Malaspina, D. M.
name: Pulupa, M.
name: Stevens, M. L.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: Space Physics (physics.space-ph)
subject: FOS: Physical sciences

description: We investigate the solar wind energy flux in the inner heliosphere using 12-day observations around each perihelion of Encounter One (E01), Two (E02), Four (E04), and Five (E05) of Parker Solar Probe (PSP), respectively, with a minimum heliocentric distance of 27.8 solar radii ($R_\odot{}$). Energy flux was calculated based on electron parameters (density $n_e$, core electron temperature $T_{c}$, and suprathermal electron temperature $T_{h}$) obtained from the simplified analysis of the plasma quasi-thermal noise (QTN) spectrum measured by RFS/FIELDS and the bulk proton parameters (bulk speed $V_p$ and temperature $T_p$) measured by the Faraday Cup onboard PSP, SPC/SWEAP. Combining observations from E01, E02, E04, and E05, the averaged energy flux value normalized to 1 $R_\odot{}$ plus the energy necessary to overcome the solar gravitation ($W_{R_\odot{}}$) is about 70$\pm$14 $W m^{-2}$, which is similar to the average value (79$\pm$18 $W m^{-2}$) derived by Le Chat et al from 24-year observations by Helios, Ulysses, and Wind at various distances and heliolatitudes. It is remarkable that the distributions of $W_{R_\odot{}}$ are nearly symmetrical and well fitted by Gaussians, much more so than at 1 AU, which may imply that the small heliocentric distance limits the interactions with transient plasma structures.
description: 8 pages, 6 figures and Astronomy & Astrophysics Accepted
Rapidly yawing spheroids in viscous shear flow: Emergent loss of symmetry
Creators: name: Dalwadi, Mohit P.
Publisher: name: arXiv
Year: 2024
Subjects: subject: Fluid Dynamics (physics.flu-dyn)
subject: Soft Condensed Matter (cond-mat.soft)
subject: Dynamical Systems (math.DS)
subject: Biological Physics (physics.bio-ph)
subject: FOS: Physical sciences
subject: FOS: Mathematics

description: We investigate the emergent three-dimensional (3D) dynamics of a rapidly yawing spheroidal swimmer interacting with a viscous shear flow. We show that the rapid yawing generates non-axisymmetric emergent effects, with the active swimmer behaving as an effective passive particle with two orthogonal planes of symmetry. We also demonstrate that this effective asymmetry generated by the rapid yawing can cause chaotic behaviour in the emergent dynamics, in stark contrast to the emergent dynamics generated by rapidly rotating spheroids, which are equivalent to those of effective passive spheroids. In general, we find that the shape of the equivalent effective particle under rapid yawing is different to the average shape of the active particle. Moreover, despite having two planes of symmetry, the equivalent passive particle is not an ellipsoid in general, except for specific scenarios in which the effective shape is a spheroid. In these scenarios, we calculate analytically the equivalent aspect ratio of the effective spheroid. We use a multiple scales analysis for systems to derive the emergent swimmer behaviour, which requires solving a nonautonomous nonlinear 3D dynamical system, and we validate our analysis via comparison to numerical simulations.
AMRVAC and Relativistic Hydrodynamic simulations for GRB afterglow phases
Creators: name: Meliani, Z.
name: Keppens, R.
name: Casse, F.
name: Giannios, D.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We apply a novel adaptive mesh refinement code, AMRVAC, to numerically investigate the various evolutionary phases in the interaction of a relativistic shell with its surrounding cold Interstellar Medium (ISM). We do this for both 1D isotropic as well as full 2D jetlike fireball models. This is relevant for Gamma Ray Bursts, and we demonstrate that, thanks to the AMR strategy, we resolve the internal structure of the shocked shell-ISM matter, which will leave its imprint on the GRB afterglow. We determine the deceleration from an initial Lorentz factor $γ=100$ up to the almost Newtonian $γ\sim{\cal O}(2)$ phase of the flow. We present axisymmetric 2D shell evolutions, with the 2D extent characterized by their initial opening angle. In such jetlike GRB models, we discuss the differences with the 1D isotropic GRB equivalents. These are mainly due to thermally induced sideways expansions of both the shocked shell and shocked ISM regions. We found that the propagating 2D ultrarelativistic shell does not accrete all the surrounding medium located within its initial opening angle. Part of this ISM matter gets pushed away laterally and forms a wide bow-shock configuration with swirling flow patterns trailing the thin shell. The resulting shell deceleration is quite different from that found in isotropic GRB models. As long as the lateral shell expansion is merely due to ballistic spreading of the shell, isotropic and 2D models agree perfectly. As thermally induced expansions eventually lead to significantly higher lateral speeds, the 2D shell interacts with comparably more ISM matter and decelerates earlier than its isotropic counterpart.
description: 12 pages, accepted in MNRAS, 12/01/2007
title: Turbopump design for cryogenic rocket engine
title: Σχεδιασμός στροβιλοαντλίας για κρυογονικό πυραυλοκινητήρα
titleType: AlternativeTitle
Creators: name: Τσίχλας, Ευάγγελος
Publisher: name: Πανεπιστήμιο Δυτικής Αττικής
Year: 2024
Subjects: Turbopump
Spacecrafts
Rocket engines

description: In this thesis, a general report is made on the cryogenic rocket engines of spaceships using liquid fuels and a detailed description on the technical characteristics of a turbopump. Simultaneously, studies of various turbopumps that were used in known rockets are reported and the new current developments are analyzed. Next, all the laws of fluid mechanics that apply to a turbopump are described, as well as all the coefficients that determine its geometric characteristics and its durability. Subsequently, the design methodology of a turbopump for pumping liquid hydrogen and oxygen in detail using the CFturbo program. Finally, the CFD analysis for each component of the turbopump is conducted using the Simscale program. The results are evaluated, new suggestions for potential efficiency enhancements are proposed and general conclusions are drawn.
Designing, Playing, and Performing with a Vision-based Mouth Interface
Creators: name: Lyons, Michael J.
name: Haehnel, Michael
name: Tetsutani, Nobuji
Publisher: name: arXiv
Year: 2020
Subjects: subject: Human-Computer Interaction (cs.HC)
subject: Computer Vision and Pattern Recognition (cs.CV)
subject: Sound (cs.SD)
subject: Audio and Speech Processing (eess.AS)
subject: FOS: Computer and information sciences
subject: FOS: Electrical engineering, electronic engineering, information engineering
subject: H.5.5

description: The role of the face and mouth in speech production as well asnon-verbal communication suggests the use of facial action tocontrol musical sound. Here we document work on theMouthesizer, a system which uses a headworn miniaturecamera and computer vision algorithm to extract shapeparameters from the mouth opening and output these as MIDIcontrol changes. We report our experience with variousgesture-to-sound mappings and musical applications, anddescribe a live performance which used the Mouthesizerinterface.
description: Proceedings of the International Conference on New Interfaces for Musical Expression, 2003