cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Business process engineering and optimisation using functional analysis of the operational workflow
Creators: name: D’Souza, Ollencio Rosario Jude
Publisher: name: Macquarie University
Year: 2022
Subjects: Other education not elsewhere classified

description: Operational environments rely on a planned workflow and measuring process parameters to meet internal and external regulatory compliance criteria. The elements of a successful functional environment and the impact of introduced technology on its effectiveness is explored. A systems approach is suggested to achieve operational objectives. Techniques using sensors and the analysis of sensor data specific to the Business Process is presented. Semantic modelling and data mining are used to investigate how the impending shift to automation can be managed by the introduction of technology that will not disrupt but will improve the process outcome. Communications technologies such as LoRaWAN (IoT LPWAN) will explore the significance of latency on the arrival times of synchronous data. Analysis of data using tools such as pivot tables and process mining will be demonstrated. Insights that provide a high degree of situational awareness are explored. Data visualisation is essential in a human-centric operational environment. This research will show how dashboards are used in advisory, supervisory and tactical operational scenarios. Process automation, helped by intelligent devices and automated functional blocks, also termed intelligent process automation, is demonstrated, leading to a serious area of research into where this work will transition.
Inferring Graph Signal Translations as Invariant Transformations for Classification Tasks
Creators: name: Baena, Raphael
name: Drumetz, Lucas
name: Gripon, Vincent
Publisher: name: arXiv
Year: 2021
Subjects: subject: Signal Processing (eess.SP)
subject: Machine Learning (cs.LG)
subject: FOS: Electrical engineering, electronic engineering, information engineering
subject: FOS: Computer and information sciences

description: The field of Graph Signal Processing (GSP) has proposed tools to generalize harmonic analysis to complex domains represented through graphs. Among these tools are translations, which are required to define many others. Most works propose to define translations using solely the graph structure (i.e. edges). Such a problem is ill-posed in general as a graph conveys information about neighborhood but not about directions. In this paper, we propose to infer translations as edge-constrained operations that make a supervised classification problem invariant using a deep learning framework. As such, our methodology uses both the graph structure and labeled signals to infer translations. We perform experiments with regular 2D images and abstract hyperlink networks to show the effectiveness of the proposed methodology in inferring meaningful translations for signals supported on graphs.
1-Form Symmetry, Isolated N=2 SCFTs, and Calabi-Yau Threefolds
Creators: name: Buican, Matthew
name: Jiang, Hongliang
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We systematically study 4D $\mathcal{N}=2$ superconformal field theories (SCFTs) that can be constructed via type IIB string theory on isolated hypersurface singularities (IHSs) embedded in $\mathbb{C}^4$. We show that if a theory in this class has no $\mathcal{N}=2$-preserving exactly marginal deformation (i.e., the theory is isolated as an $\mathcal{N}=2$ SCFT), then it has no 1-form symmetry. This situation is somewhat reminiscent of 1-form symmetry and decomposition in 2D quantum field theory. Moreover, our result suggests that, for theories arising from IHSs, 1-form symmetries originate from gauge groups (with vanishing beta functions). One corollary of our discussion is that there is no 1-form symmetry in IHS theories that have all Coulomb branch chiral ring generators of scaling dimension less than two. In terms of the $a$ and $c$ central charges, this condition implies that IHS theories satisfying $a
description: 84 pages; v2: references added, minor typos fixed, minor additional result (direct proof of corollary 1)
HD 76920b pinned down: a detailed analysis of the most eccentric planetary system around an evolved star
Creators: name: Bergmann, C.
name: Jones, M. I.
name: Zhao, J.
name: Mustill, A. J.
name: Brahm, R.
name: Torres, P.
name: Wittenmyer, R. A.
name: Gunn, F.
name: Pollard, K. R.
name: Zapata, A.
name: Vanzi, L.
name: Wang, Songhu
Publisher: name: arXiv
Year: 2021
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: FOS: Physical sciences

description: We present 63 new multi-site radial velocity measurements of the K1III giant HD 76920, which was recently reported to host the most eccentric planet known to orbit an evolved star. We focussed our observational efforts on the time around the predicted periastron passage and achieved near-continuous phase coverage of the corresponding radial velocity peak. By combining our radial velocity measurements from four different instruments with previously published ones, we confirm the highly eccentric nature of the system, and find an even higher eccentricity of $e=0.8782 \pm 0.0025$, an orbital period of $415.891^{+0.043}_{-0.039}\,\mathrm{d}$, and a minimum mass of $3.13^{+0.41}_{-0.43}\,\mathrm{M_J}$ for the planet. The uncertainties in the orbital elements are greatly reduced, especially for the period and eccentricity. We also performed a detailed spectroscopic analysis to derive atmospheric stellar parameters, and thus the fundamental stellar parameters ($M_*, R_*, L_*$), taking into account the parallax from Gaia DR2, and independently determined the stellar mass and radius using asteroseismology. Intriguingly, at periastron the planet comes to within 2.4 stellar radii of its host star's surface. However, we find that the planet is not currently experiencing any significant orbital decay and will not be engulfed by the stellar envelope for at least another $50-80$ Myr. Finally, while we calculate a relatively high transit probability of $16\%$, we did not detect a transit in the TESS photometry.
description: 15 pages, 12 figures, 5 tables, accepted for publication in PASA
Η σχέση του εργασιακού οστρακισμού με τις εργασιακές σχέσεις και την φιλότιμη οργανωσιακή συμπεριφορά
Creators: name: Μπάρμπα, Ελένη Ευάγγελου
Publisher: name: Aristotle University of Thessaloniki
Year: 2016
Subjects: Εργασιακός οστρακισμός
Εργασιακές σχέσεις
Φιλότιμη οργανωσιακή συμπεριφορά
Workplace ostracism
Industrial relations
Organizational citizenship behavior

description: Η παρούσα διπλωματική εργασία μελετά το φαινόμενο του οστρακισμού και ειδικότερα στα πλαίσια του εργασιακού περιβάλλοντος. Ο οστρακισμός αναφέρεται στο μέγεθος σύμφωνα με το οποίο αντιλαμβάνεται ένας άνθρωπος ότι αποκλείεται ή αγνοείται χωρίς αυτό να συμβαίνει, τις περισσότερες φορές, για κάποιο συγκεκριμένο λόγο. Στην συνέχεια, μελετάται η σχέση του εργασιακού οστρακισμού με τις εργασιακές σχέσεις αλλά και την φιλότιμη οργανωσιακή συμπεριφορά. Αρχικά, πραγματοποιείται ανάλυση του θεωρητικού υπόβαθρου, βάσει της μέχρι τώρα αρθρογραφίας σχετικά με τους τρεις παράγοντες που συμπεριλήφθηκαν στο ερευνητικό μοντέλο. Στην συνέχεια, αναλύονται τα αποτελέσματα της εμπειρικής έρευνας που έλαβε χώρα στην Ελλάδα, το διάστημα Νοέμβριος-Δεκέμβριος 2014 με συνολικά 97 απαντήσεις. Τα αποτελέσματα της έρευνας μαρτυρούν την αρνητική συσχέτιση του εργασιακού οστρακισμού με τους άλλους δύο παράγοντες. Τέλος, παρατίθενται κάποια μέτρα που μπορούν να εφαρμόσουν τα διοικητικά στελέχη με σκοπό να προλαμβάνουν ή να εξαλείφουν φαινόμενα οστρακισμού στον εργασιακό χώρο, οι περιορισμοί της έρευνας αλλά και προτάσεις για μελλοντική έρευνα.
description: This thesis examines the phenomenon of ostracism especially within the workplace. The ostracism, the extent to which a person perceives that he or she is excluded or ignored, happens most of the time with no specific reason. Further, we examine the connection between workplace ostracism with industrial relations and organizational citizenship behavior. First, we begin with the literature review about the three variables included in the research model. Then, we analyze the results of the empirical research conducted in Greece the period November-December of 2014 on 97 employees. The results revealed the negative association between workplace ostracism and the other two variables. Lastly, some practical implications are provided for managers in order to prevent or eliminate the phenomenon of workplace ostracism, as well as the limitations of the research and suggestions for future research.
Grammatical elicitation: Wordhood and stress
Creators: name: Palacio, Frank
name: Dabkowski, Maksymilian
Publisher: name: California Language Archive, University of California, Berkeley
Year: 2022
Subjects: subject: cab

description: Nouns úbara 'fingernail,' isíjedu 'plate,' éde 'booty,' gusíj̃u 'knife,' ídibu 'plant,' and fulásu 'property' with possessive prefixes; verbs aríha 'see,' óubra 'hug,' and éibagu 'run' with passive voice and tense-aspect-modality suffixes and auxiliaries.
Οι Συμπράξεις Δημόσιου-Ιδιωτικού Τομέα
Creators: name: Αγγελίδου, Σταυρούλα Τάκη
Publisher: name: Aristotle University of Thessaloniki
Year: 2016
Subjects: Συμπράξεις δημόσιου-ιδιωτικού τομέα
Δημόσιες συμβάσεις
Συμβάσεις παραχώρησης
Public-private partnerships
Public procurement
Concessions

description: Αντικείμενο της παρούσας εργασίας αποτελεί η μελέτη του φαινόμενου των Συμπράξεων Δημόσιου-Ιδιωτικού Τομέα (ΣΔΙΤ), ως εναλλακτική μορφή δημοσίων συμβάσεων για την εκτέλεση δημόσιων έργων και την παροχή δημόσιων υπηρεσιών στους πολίτες. Αρχικά εξετάζουμε τα εννοιολογικά γνωρίσματα των ΣΔΙΤ κατά τη διεθνή εμπειρία και πρακτική και στη συνέχεια η μελέτη μας επικεντρώνεται στην αντιμετώπιση του θεσμού των ΣΔΙΤ από το δίκαιο της ΕΕ και, ιδίως, στο ζήτημα της εφαρμογής επί των ΣΔΙΤ του παράγωγου ενωσιακού δικαίου για τις παραδοσιακές δημόσιες συμβάσεις και τις συμβάσεις παραχώρησης. Στη συνέχεια παρουσιάζουμε τις βασικές ρυθμίσεις του Ν.3389/2005 για τις ελληνικές ΣΔΙΤ με έμφαση στις προϋποθέσεις εφαρμογής του νόμου, στα αρμόδια όργανα και τις διαδικασίες σύναψης και υλοποίησης των ΣΔΙΤ. Επιπλέον εξετάζουμε αναλυτικά ορισμένα κρίσιμα νομικά ζητήματα, όπως το ζήτημα της νομοθετικής κύρωσης των ΣΔΙΤ, τη νομική φύση των συμπράξεων, το εφαρμοστέο δίκαιο και το ζήτημα της διαιτητικής επίλυσης των διαφορών που προκύπτουν από τη σύμβαση. Τέλος, επιχειρούμε μία σύγκριση των ΣΔΙΤ με τις κλασικές δημόσιες συμβάσεις και τις συμβάσεις παραχώρησης και εντοπίζουμε τα βασικά σημεία σύγκλισης και διάκρισης.
description: The subject of the present paper is the study of the Public Private Partnerships (PPPs) phenomenon as an alternative form of public contracts for the execution of public works and the provision of public services to citizens. We first examine the main characteristics of PPPs according to the international experience and practice and then our study focuses on how the EU law addresses the institution of PPPs and particularly on the question whether the secondary EU legislation on traditional public procurement and concessions is applicable to PPPs. Then we present the main provisions of the law 3389/2005 for the greek PPPs with emphasis on the conditions for the application of the law, the competent authorities and the procedures for the PPPs conclusion and implementation. We also examine in detail some critical legal issues such as the PPPs ratification by law, the legal nature of the partnerships and the issue of arbitration for resolving disputes arising from the contract. At the end we compare PPPs with conventional public contracts and concessions and we try to point out the main similarities and differences between them.
Is there a black hole minimum mass?
Creators: name: Harada, Tomohiro
Publisher: name: arXiv
Year: 2006
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: Astrophysics (astro-ph)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: Applying the first and generalised second laws of thermodynamics for a realistic process of near critical black hole formation, we derive an entropy bound, which is identical to Bekenstein's one for radiation. Relying upon this bound, we derive an absolute minimum mass $\sim0.04 \sqrt{g_{*}}m_{\rm Pl}$, where $g_{*}$ and $m_{\rm Pl}$ is the effective degrees of freedom for the initial temparature and the Planck mass, respectively. Since this minimum mass coincides with the lower bound on masses of which black holes can be regarded as classical against the Hawking evaporation, the thermodynamical argument will not prohibit the formation of the smallest classical black hole. For more general situations, we derive a minimum mass, which may depend on the initial value for entropy per particle. For primordial black holes, however, we show that this minimum mass can not be much greater than the Planck mass at any formation epoch of the Universe, as long as $g_{*}$ is within a reasonable range. We also derive a size-independent upper bound on the entropy density of a stiff fluid in terms of the energy density.
description: 4 pages, accepted for publication in Physical Review D, minor correction
Anomalously Strong Near-Neighbor Attraction in Doped 1D Cuprate Chains
Creators: name: Chen, Zhuoyu
name: Wang, Yao
name: Rebec, Slavko N.
name: Jia, Tao
name: Hashimoto, Makoto
name: Lu, Donghui
name: Moritz, Brian
name: Moore, Robert G.
name: Devereaux, Thomas P.
name: Shen, Zhi-Xun
Publisher: name: arXiv
Year: 2021
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: In the cuprates, one-dimensional chain compounds provide a unique opportunity to understand the microscopic physics due to the availability of reliable theories. However, progress has been limited by the inability to controllably dope these materials. Here, we report the synthesis and spectroscopic analysis of the one-dimensional cuprate Ba$_{2-x}$Sr$_x$CuO$_{3+δ}$ over a wide range of hole doping. Our angle-resolved photoemission experiments reveal the doping evolution of the holon and spinon branches. We identify a prominent folding branch whose intensity fails to match predictions of the simple Hubbard model. An additional strong near-neighbor attraction, which may arise from coupling to phonons, quantitatively explains experiments for all accessible doping levels. Considering structural and quantum chemistry similarities among cuprates, this attraction will play a similarly crucial role in the high-$T_C$ superconducting counterparts
Εφαρμογή Στοχαστικών Μοντέλων σε Στρατηγικές Μάρκετινγκ
Creators: name: Τάτση, Μαρία Γεωργίου
Publisher: name: Aristotle University of Thessaloniki
Year: 2016
Subjects: Στοχαστικά Μοντέλα
Κάρτες Πιστότητας
Συστήματα Επιχειρηματικής Ευφυΐας
Stochastic Models
Loyalty Cards
Business Intelligence Systems

description: Τις τελευταίες δεκαετίες η Επιχειρηματική Ευφυΐα έχει αναδειχθεί ως ένας σημαντικός τομέας μελέτης σε κάθε επιχειρηματικό οργανισμό. Σκοπός της παρούσας εργασίας είναι η μελέτη και η κατανόηση των Συστημάτων Επιχειρηματικής Ευφυΐας και η υλοποίηση μεθόδων για την εκτέλεση πειραμάτων marketing. Βασιζόμενοι στα δεδομένα που προέρχονται από τις κάρτες πιστότητας των καταναλωτών, γίνεται προσπάθεια υλοποίησης ενός καινοτόμου πειράματος, που θα φάνταζε χρήσιμο στο τμήμα marketing κάθε επιχείρησης.
description: In recent decades Business Intelligence has emerged as an important area of study in every business organization. The purpose of this work is the study and understanding of Business Intelligence Systems and implementation methods for performing marketing experiments. Based on data from the consumer loyalty cards, made effort for the implementation of an innovative experiment, that seemed useful in the marketing department of each company.
Investigation of the applicability of wetland biomass for producing hydrochar by hydrothermal carbonization and its effectiveness for the adsorption of ammonia
Creators: name: Ibrahim, Bassel
Publisher: name: Universität Rostock
Year: 2018
Subjects: subject: 333.7 Natural resources, energy and environment
subject: 570 Life science
subject: 630 Agriculture

description: Die Motivation dieser Arbeit war die Nutzung von weitverbreiteten aber wenig genutzten Moorbiomassen wie Schilf, Rohrkolben, Binsen und Seggen als Substrate für die hydrothermale Karbonisierung (HTC), um kohlenstoffhaltige Materialien zu produzieren und ihre Eignung als alternative Adsorbentien zur Entfernung von Ammoniak in wässriger Lösung zu prüfen. Die Ergebnisse bestätigten, dass es möglich war, Moorbiomasse in kohlenstoffhaltige Produkte mit einer ausreichend hohen Effizienz für die Ammoniakentfernung in wässriger Lösung umzuwandeln, um sie potenziell als Filtermaterial nutzen zu können
A Systematic Review of Bio-Cyber Interface Technologies and Security Issues for Internet of Bio-Nano Things
Creators: name: Zafar, Sidra
name: Nazir, Mohsin
name: Bakhshi, Taimur
name: Khattak, Hasan Ali
name: Khan, Sarmadullah
name: Bilal, Muhammad
name: Choo, Kim-Kwang Raymond
name: Kwak7, Kyung-Sup
name: Sabah, Aneeqa
Publisher: name: arXiv
Year: 2021
Subjects: subject: Networking and Internet Architecture (cs.NI)
subject: Cryptography and Security (cs.CR)
subject: Emerging Technologies (cs.ET)
subject: FOS: Computer and information sciences

description: Advances in synthetic biology and nanotechnology have contributed to the design of tools that can be used to control, reuse, modify, and re-engineer cells' structure, as well as enabling engineers to effectively use biological cells as programmable substrates to realize Bio-Nano Things (biological embedded computing devices). Bio-NanoThings are generally tiny, non-intrusive, and concealable devices that can be used for in-vivo applications such as intra-body sensing and actuation networks, where the use of artificial devices can be detrimental. Such (nano-scale) devices can be used in various healthcare settings such as continuous health monitoring, targeted drug delivery, and nano-surgeries. These services can also be grouped to form a collaborative network (i.e., nanonetwork), whose performance can potentially be improved when connected to higher bandwidth external networks such as the Internet, say via 5G. However, to realize the IoBNT paradigm, it is also important to seamlessly connect the biological environment with the technological landscape by having a dynamic interface design to convert biochemical signals from the human body into an equivalent electromagnetic signal (and vice versa). This, unfortunately, risks the exposure of internal biological mechanisms to cyber-based sensing and medical actuation, with potential security and privacy implications. This paper comprehensively reviews bio-cyber interface for IoBNT architecture, focusing on bio-cyber interfacing options for IoBNT like biologically inspired bio-electronic devices, RFID enabled implantable chips, and electronic tattoos. This study also identifies known and potential security and privacy vulnerabilities and mitigation strategies for consideration in future IoBNT designs and implementations.
description: 41 pages, 9 tables, 6 figures
Phase diagram of the three states Potts model with next nearest neighbor interactions on the Bethe lattice
Creators: name: Ganikhodjaev, Nasir
name: Mukhamedov, Farrukh
name: Pah, Chin Hee
Publisher: name: arXiv
Year: 2008
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: We have found an exact phase diagram of the Potts model with next nearest neighbor interactions on the Bethe lattice of order two. The diagram consists of five phases: ferromagnetic, paramagnetic, modulated, antiphase and paramodulated, all meeting at the Lifshitz point i.e. $p=1/3$. We report on a new phase which we denote as paramodulated, found at low temperatures and characterized by 2-periodic points of an one dimensional dynamical system lying inside the modulated phase. Such a phase, inherent in the Potts model has no analogues in the Ising setting.
Ασφαλής Διακίνηση Εγγράφων
Creators: name: Μωϋσίδης, Νικόλαος Χαράλαμπου
Publisher: name: Aristotle University of Thessaloniki
Year: 2016
Subjects: Επικοινωνία
Ασφάλεια
Διακίνηση Εγγράφων
Communication
Security
Handling Documents

description: Η ανάπτυξη της τεχνολογίας και η εξάπλωση ποικίλων εφαρμογών σε περιβάλλοντα δικτύων Ηλεκτρονικών Υπολογιστών (Η/Υ), έχει καταστήσει σήμερα επιτακτική την ανάγκη για ασφαλή διακίνηση πληροφοριών, μέσω υπολογιστών, σε όλο και περισσότερο ευρύ φάσμα εφαρμογών και είδη χρηστών. Αντικείμενο της παρούσας εργασίας είναι η εξεύρεση μιας λύσης για την ασφαλή διακίνηση εγγράφων στο εσωτερικό κάποιου οργανισμού. Αντικείμενο ιδιαίτερα αναγκαίο και ζωτικό για τις Ένοπλες Δυνάμεις (Ε.Δ), το οποίο μπορεί να συμβάλλει τα μέγιστα στην διασφάλιση του αδιάβλητου των επικοινωνιών. Αρχικά, δίνονται κάποιοι ορισμοί-βασικές έννοιες για την κρυπτογραφία. Στην συνέχεια γίνεται μια σύντομη αναφορά στην ιστορία της και τις εφαρμογές της. Έπειτα περιγράφονται τα εργαλεία και οι αλγόριθμοι που χρησιμοποιήθηκαν. Στη συνέχεια παρουσιάζεται η υλοποίηση μιας προτεινόμενης λύσης και τέλος παρουσιάζονται κάποια συμπεράσματα και σχόλια.
description: The development of technology and the spread of various applications in network environments, has today made an urgent need for safe handling of information in increasingly wide range of applications and types of users. The object of this paper is to find a solution for the safe handling of documents within an organization. An objective particularly necessary and vital for the Armed Forces, which can contribute greatly to ensuring the integrity of communications. First, some definitions are given concerning cryptography. A brief history of cryptography and some of its applications follows. Also, we provide a description of tools and algorithms that used in this paper. Finally, we propose a solution and present some conclusions and comments.
WALOP-South: A Four Camera One Shot Imaging Polarimeter for PASIPHAE Survey. Paper I -- Optical Design
Creators: name: Maharana, Siddharth
name: Kypriotakis, John A.
name: Ramaprakash, A. N.
name: Rajarshi, Chaitanya
name: Anche, Ramya M.
name: Shrish
name: Blinov, Dmitry
name: Eriksen, Hans Kristian
name: Ghosh, Tuhin
name: Gjerløw, Eirik
name: Mandarakas, Nikolaos
name: Panopoulou, Georgia V.
name: Pavlidou, Vasiliki
name: Pearson, Timothy J.
name: Pelgrims, Vincent
name: Potter, Stephen B.
name: Readhead, Anthony C. S.
name: Skalidis, Raphael
name: Tassis, Konstantinos
name: Wehus, Ingunn K.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: FOS: Physical sciences

description: The WALOP-South instrument will be mounted on the 1 m SAAO telescope in South Africa as part of the PASIPHAE program to carry out a linear imaging polarization survey of the Galactic polar regions in the optical band. Designed to achieve polarimetric sensitivity of $0.05~\%$ across a $35\times35$ arcminute field of view, it will be capable of measuring the Stokes parameters I, q and u in a single exposure in the SDSS-r broadband and narrowband filters between $0.5~μm - 0.7~μm$. For each measurement, four images of the full field corresponding to linear polarization angles of 0 deg, 45 deg, 90 deg and 135 deg in the instrument coordinate system will be created on four detectors from which the Stokes parameters can be found using differential photometry. In designing the optical system, major challenges included correcting for the dispersion introduced by large split angle Wollaston Prisms used as analysers as well as other aberrations from the entire field to obtain imaging quality PSF at the detector. We present the optical design of the WALOP-South instrument which overcomes these challenges and delivers near seeing limited PSFs for the entire field of view.
description: 31 pages, 18 Figures and 8 Tables. Accepted in the Journal of Astronomical Telescopes, Instruments, and Systems
Parton distribution function for quarks in an s-channel approach
Creators: name: Hautmann, F.
name: Soper, D. E.
Publisher: name: arXiv
Year: 2007
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We use an s-channel picture of hard hadronic collisions to investigate the parton distribution function for quarks at small momentum fraction x, which corresponds to very high energy scattering. We study the renormalized quark distribution at one loop in this approach. In the high-energy picture, the quark distribution function is expressed in terms of a Wilson-line correlator that represents the cross section for a color dipole to scatter from the proton. We model this Wilson-line correlator in a saturation model. We relate this representation of the quark distribution function to the corresponding representation of the structure function F_T(x,Q^2) for deeply inelastic scattering.
Inside pandora’s box: a systematic review of the assessment of the perceived quality of chatbots for people with disabilities or special needs
Creators: name: Federici, Stefano
name: Filippis, Maria Laura De
name: Mele, Maria Laura
name: Borsci, Simone
name: Bracalenti, Marco
name: Gaudino, Giancarlo
name: Cocco, Antonello
name: Amendola, Massimo
name: Simonetti, Emilio
Publisher: name: Taylor & Francis
Year: 2020
Subjects: subject: Space Science
subject: Medicine
subject: Biotechnology
subject: 80699 Information Systems not elsewhere classified
subject: FOS: Computer and information sciences
subject: Cancer

description: Introduction: People with disabilities or special needs can benefit from AI-based conversational agents (i.e., chatbots) that are used for competence training and well-being management. Assessing the quality of interactions with these chatbots is key to being able to reduce dissatisfaction with them and to understanding their potential long-term benefit. This in turn will help to increase adherence to their use, thereby improving the quality of life of the large population of end-users that they are able to serve. Methods: Following Preferred Reporting Items for Systematic reviews and Meta-Analyses (PRISMA) methodology, we systematically reviewed the literature on methods of assessing the perceived quality of interactions with chatbots using the from Scopus and the Web of Science electronic databases. Using the Boolean operators (AND/OR) the keywords chatbot*, conversational agent*, special needs, disability were combined. Results: Revealed that only 15 of 192 papers on this topic included people with disabilities or special needs in their assessments. The results also highlighted the lack of a shared theoretical framework for assessing the perceived quality of interactions with chatbots. Conclusion: Systematic procedures based on reliable and valid methodologies continue to be needed in this field. The current lack of reliable tools and systematic methods to assess chatbots for people with disabilities and special needs is concerning, and ultimately, it may also lead to unreliable systems entering the market with disruptive consequences for people.Implications for rehabilitationChatbots applied in rehabilitation are mainly tested in terms of clinical effectiveness and validity with a minimal focus on measuring the quality of the interactionThe usability and interactive properties of chatbots applied in rehabilitation are not comparable as each tool is measured in different wayThe lack of a common framework to assess chatbots exposes people with disability and special needs to the risk of using unreliable tools Chatbots applied in rehabilitation are mainly tested in terms of clinical effectiveness and validity with a minimal focus on measuring the quality of the interaction The usability and interactive properties of chatbots applied in rehabilitation are not comparable as each tool is measured in different way The lack of a common framework to assess chatbots exposes people with disability and special needs to the risk of using unreliable tools
Οικονομετρική μελέτη της αγοράς ηλεκτρικής ενέργειας Νοrd Pool
Creators: name: Σεϊταρίδης, Μιχαήλ Ηλία
Publisher: name: Aristotle University of Thessaloniki
Year: 2016
Subjects: Χονδρική τιμή ηλεκτρικής ενέργειας
Σκανδιναβική αγορά ενέργειας
Υπόδειγμα Αυτοπαλίνδρομων Διανυσμάτων
Wholesale electricity price
Nordic power market
Vector Autoregression Model

description: Η εργασία εστιάζει στην ανάλυση των δυναμικών σχέσεων στις διαφορετικές ωριαίες τιμές της ηλεκτρικής ενέργειας στην ίδια περιοχή διαπραγμάτευσης, κάτι που θεωρούμε ότι είναι χρήσιμο στην διαχείριση κινδύνου από την πλευρά των συμμετεχόντων της αγοράς. Χρησιμοποιώντας ωριαία δεδομένα από την αγορά της NordPool για την περιοχή της δυτικής Δανίας (DK1), για την περίοδο01/01/2006με 31/12/2014 βρήκαμεαρχικά, ότι οι διάμεσοι του Σαββατοκύριακου είναι μικρότεροι και διαφέρουν στατιστικά σημαντικά από αυτούς των εργάσιμων ημέρων. Στην συνέχεια εφαρμόζοντας την τεχνική των συστημάτων VAR και συνεχίζοντας με ελέγχους αιτιότητας κατά Granger,διαπιστώσαμε ότι η 19ηκαι η 24ηώρα είναι αυτές που επιδρούν (σε μεγαλύτερο βαθμό από τις άλλες ώρες) σημαντικάστην διαμόρφωση των τιμών των άλλων ωρών. Τέλος, με την εφαρμογή των μεθόδων IRF καιVDπαρατηρήσαμε πως οι περισσότερες τυχαίες διαταραχές σε όλες τις μεταβλητές δεν έχουν στατιστικά σημαντική (σ.σ.) επίδραση κατά το τέλος της δέκατης ημέρας, ενώ όλες οι αντιδράσεις των τιμών σε αυτές είναι είτε θετικές είτε μηδενικές. Επίσης, μια διαταραχή στις βραδινές ώρες (από την 22η ώρα έως την 24η) επηρεάζει θετικά και σ.σ. τις πρώτες επτά πρωινές ώρες όμως όχι τις μεσημεριανές και τις απογευματινές ώρες.
description: This paper focuses on the analysis of dynamic relations in different hourly electricity prices in the same trading area, which we consider to be useful to market participants to develop strategies for risk management. Using hourly data from the Nord Pool market for the region of western Denmark (DK1), for the period 01/01/2006 to 31/12/2014 we, initially, found that the medians of the weekend are smaller and statistically significantly different from those of the working days. Then, by applying the technique of VAR systems and continuing with Grangercausality tests, we found that the 19thand the 24th hour are those that affect (to a greater extent than the other hours) significantly to the price formation of other hours. Finally, by applying the IRF and VD methods, we observed that most random shocks, in all variables,have not statistically significant effect at the end of the tenth day and most variables response either positively or neutrally. Also, a shockin the evening hours (from the 22nd to the 24th hour) affects positively and statistically significantthe first seven morning hours but not the afternoon and evening hours.
Expressing the equation of state parameter in terms of the three dimensional cosmic shear
Creators: name: Levy, Daniel
name: Brustein, Ram
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We study the functional dependence of the spin-weighted angular moments of the two-point correlation function of the three dimensional cosmic shear on the expansion history of the universe. We first express the redshift dependent total equation of state parameter in terms of the growing mode of the gauge invariant metric perturbation in the conformal-Newtonian gauge for the case of adiabatic perturbations. We then express the redshift dependent angular moments of the shear two-point correlation function as an integral in terms of the metric perturbation. We present the final explicit expression for the case of a Harrison-Zeldovich spectrum of primordial perturbations. Our analysis is restricted to the linear regime. We use our results to make a preliminary study of the required sensitivity that will allow cosmic shear observations to add significant information about the expansion history of the universe.
description: Final version to appear in JCAP. Substantial improvements include added preliminary numerial results and a realistic transfer function
Αλγόριθμοι ερωτημάτων κορυγογραμμής σε ροές πολυδιάστατων δεδομένων
Creators: name: Τζάνακας, Αλέξανδρος Χρήστου
Publisher: name: Aristotle University of Thessaloniki
Year: 2016
Subjects: Ανάλυση αλγορίθμων ερωτημάτων κορυφογραμμών
Αξιολόγηση αλγορίθμων
Πειράματα
Analysis of skyline query algorithms
Evaluation of algorithms
Experiments

description: Σκοπός της διατριβής ήταν η μελέτη, η ανάλυση καθώς και η αξιολόγηση αλγορίθμων εύρεσης κορυφογραμμών σε ροές πολυδιάστατων δεδομένων. Διάφορα πειράματα εκτελέσθηκαν για να γίνει η αξιολόγηση των αλγορίθμων. Τα πειράματα περιελάμβαναν δεδομένα διαφορετικών τύπων και διαστάσεων, έτσι ώστε να μετρηθεί η απόδοση των αλγορίθμων σε διαφορετικά σενάρια. Οι κύριες μετρικές περιλαμβάνουν τον χρόνο εκτέλεσης, την κατανάλωση μνήμης και το μέγεθος της κορυφογραμμής.
description: The aim of the present thesis was the study, analysis and the evaluation of skyline query algorithms on streams of multidimensional data. Various experiments were conducted for the evaluation of the algorithms. The experiments included data sets with various data types and dimensions, so that the performance of the algorithms is measured in different scenarios. The main metrics include the execution time, the memory consumption and the size of the skyline.
In search of the myth in history : the narrative of the quest from sacred to secular
Creators: name: Zimmerman, Kate Ballantyne
Publisher: name: University of British Columbia
Year: 2008

description: Following the work of Edward Said, the constructed truth of the Western Other through a tradition of literary imagery (tropes), and the way these constructions inform and guide the agency and praxis of a dominating West, are now fundamental concepts for much anthropological analysis. Through examining the Western narrative of "the quest" as it appears in three different periods of Western history, this paper examines the emergence of literary tropes from mythological narratives. In so doing the paper raises two questions: First, in what way does the advent of symbolic coding for language, or literacy, change the relationship between the social actor/agent and narrative? Second, in what way does myth, in its anthropological sense, maintain its presence in the Western historical tradition? This paper, then, is an anthropology of the West. Of particular relevance here are the works of Edward Said, Jonathan Hill, Jack Goody, Walter Ong, and Northrop Frye. Keywords: myth, metaphor, mythological narrative, literacy, literary trope, action.
Appraisals of robotic locomotor exoskeletons for gait: focus group insights from potential users with spinal cord injuries
Creators: name: Heinemann, Allen W.
name: Kinnett-Hopkins, Dominique
name: Chaithanya K. Mummidisetty
name: Bond, Rachel A.
name: Ehrlich-Jones, Linda
name: Furbish, Catherine
name: Edelle Field-Fote
name: Jayaraman, Arun
Publisher: name: Taylor & Francis
Year: 2020
Subjects: subject: Space Science
subject: Ecology
subject: FOS: Biological sciences
subject: Sociology
subject: FOS: Sociology
subject: 69999 Biological Sciences not elsewhere classified
subject: Science Policy

description: Purpose: To describe appraisals of robotic exoskeletons for locomotion by potential users with spinal cord injuries, their perceptions of device benefits and limitations, and recommendations for manufacturers and therapists regarding device use. Materials and methods: We conducted focus groups at three regional rehabilitation hospitals and used thematic analysis to define themes. Results: Across four focus groups, 35 adults participated; they were predominantly middle-aged, male, and diverse in terms of race and ethnicity, well educated, and not working. Participants had been living with SCI an average of two decades. Most participants were aware of exoskeletons. Some were enthusiastic about the usability of the devices while others were more circumspect. They had many questions about device affordability and usability, and were discerning in their appraisal of benefits and suitability to their particular circumstances. They reflected on device cost, the need for caregiver assistance, use of hands, and environmental considerations. They weighed the functional benefits relative to the cost of preferred activities. Their recommendations focused on cost, battery life, and independent use. Conclusions: Potential users’ appraisals of mobility technology reflect a nuanced appreciation of device costs; functional, social, and psychological benefits; and limitations. Results provide guidance to therapists and manufacturers regarding device use.Implications for RehabilitationPotential users of robotic locomotor exoskeletons with spinal cord injuries appreciate the functional, social, and psychological benefits that these devices may offer.Their appraisals reflect nuanced consideration of device cost and features, and the suitability of the assistive technology to their circumstances.They recommend that manufacturers focus on reducing cost, extending battery life, and features that allow independent use. Potential users of robotic locomotor exoskeletons with spinal cord injuries appreciate the functional, social, and psychological benefits that these devices may offer. Their appraisals reflect nuanced consideration of device cost and features, and the suitability of the assistive technology to their circumstances. They recommend that manufacturers focus on reducing cost, extending battery life, and features that allow independent use.
Effect of interface disorder on quantum well excitons and microcavity polaritons
Creators: name: Savona, Vincenzo
Publisher: name: arXiv
Year: 2007
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Other Condensed Matter (cond-mat.other)
subject: FOS: Physical sciences

description: The theory of the linear optical response of excitons in quantum wells and polaritons in planar semiconductor microcavities is reviewed, in the light of the existing experiments. For quantum well excitons, it is shown that disorder mainly affects the exciton center-of-mass motion and is modeled by an effective Schroedinger equation in two dimensions. For polaritons, a unified model accounting for quantum well roughness and fluctuations of the microcavity thickness is developed. Numerical results confirm that polaritons are mostly affected by disorder acting on the photon component, thus confirming existing studies on the influence of exciton disorder. The polariton localization length is estimated to be in the few-micrometer range, depending on the amplitude of disorder, in agreement with recent experimental findings.
description: To appear in Journal of Physics: Condensed Matter
Domain Adaptation for Medical Image Analysis: A Survey
Creators: name: Guan, Hao
name: Liu, Mingxia
Publisher: name: arXiv
Year: 2021
Subjects: subject: Computer Vision and Pattern Recognition (cs.CV)
subject: Machine Learning (cs.LG)
subject: Image and Video Processing (eess.IV)
subject: FOS: Computer and information sciences
subject: FOS: Electrical engineering, electronic engineering, information engineering

description: Machine learning techniques used in computer-aided medical image analysis usually suffer from the domain shift problem caused by different distributions between source/reference data and target data. As a promising solution, domain adaptation has attracted considerable attention in recent years. The aim of this paper is to survey the recent advances of domain adaptation methods in medical image analysis. We first present the motivation of introducing domain adaptation techniques to tackle domain heterogeneity issues for medical image analysis. Then we provide a review of recent domain adaptation models in various medical image analysis tasks. We categorize the existing methods into shallow and deep models, and each of them is further divided into supervised, semi-supervised and unsupervised methods. We also provide a brief summary of the benchmark medical image datasets that support current domain adaptation research. This survey will enable researchers to gain a better understanding of the current status, challenges.
description: 15 pages, 7 figures
Liu Binyan's odyssey : intellectuals and the state in the PRC
Creators: name: Zhu, Caixia
Publisher: name: University of British Columbia
Year: 2008

description: The complex relationship between Chinese intellectuals and the Party-state has been an important aspect of China's politics since 1949. This paper deals with the intellectual-state relationship in general and with the life of Liu Binyan--a prominent Chinese intellectual--in particular. The paper explains how cultural traditions drew Chinese intellectuals into the nation's politics and how the intellectuals’ self-image affected both their attitudes and behaviour toward the state and society, as well as their fate in the Chinese polity after 1949. The objective of the paper is, from this perspective, to provide a better understanding of the intellectuals' political position in China today. The methodology of the paper is to approach the topic from a historical perspective. The paper suggests that Chinese intellectuals, as a social group, have been recognized as an elite class since ancient times and are an integral part of the PRC political establishment. Their attitudes toward the state, the society and social masses have been consistently characterized by patriotism, patronage and paternalism. The paper argues that, considering their close attachment to political power and deep involvement in political affairs, Chinese intellectuals are largely responsible for their destiny. The paper observes that, through the analysis of Liu's experience, Chinese intellectuals have frequently faced a dilemma by playing a dual-role: as a spokesperson for both the regime, and for the people. A dilemma that Chinese intellectuals have yet to resolve. In the last chapter, while pointing out changes in China's economic infrastructure and its impact on the on-going intellectual-state relationship, the author concludes that the present pattern of the intellectual-state relationship will continue.
Granular Flows in a Rotating Drum: the Scaling Law between Velocity and Thickness of the Flow
Creators: name: Félix, Gwenaëlle
name: Falk, Véronique
name: D'Ortona, Umberto
Publisher: name: arXiv
Year: 2006
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: FOS: Physical sciences

description: The flow of dry granular material in a half-filled rotating drum is studied. The thickness of the flowing zone is measured for several rotation speeds, drum sizes and beads sizes (size ratio between drum and beads ranging from 47 to 7400). Varying the rotation speed, a scaling law linking mean velocity vs thickness of the flow, $v\sim h^m$, is deduced for each couple (beads, drum). The obtained exponent $m$ is not always equal to 1, value previously reported in a drum, but varies with the geometry of the system. For small size ratios, exponents higher than 1 are obtained due to a saturation of the flowing zone thickness. The exponent of the power law decreases with the size ratio, leading to exponents lower than 1 for high size ratios. These exponents imply that the velocity gradient of a dry granular flow in a rotating drum is not constant. More fundamentally, these results show that the flow of a granular material in a rotating drum is very sensible to the geometry, and that the deduction of the ``rheology'' of a granular medium flowing in such a geometry is not obvious.
Χαρτογράφηση παράκτιας περιοχής με μη επανδρωμένα εναέρια μέσα
Creators: name: Ποντίκας, Ηλίας Γεωργίου
Publisher: name: Aristotle University of Thessaloniki
Year: 2016
Subjects: Μη επανδρωμένα εναέρια μέσα
Χαρτογράφηση Παράκτιας Περιοχής
Παραγωγή και αξιολόληση φωτογραμμετρικών προϊόντων
Παγχρωματική λέπτυνση
Εφαρμοή δεικτών
Ταξινόμηση
Βυθομετρηση
Οριοθέτηση Αιγιαλού και Παραλίας
UAV
Coastal Mapping
Aerial Photography
Dsm
Orthomosaic
Evaluation of photogrammetric production
Pan Sharpening
NDVI
NDWI
Classification
Determination of coastline, seashore line and the backshore zone

description: Μέσα από την εργασία αυτή έγινε μια προσπάθεια χαρτογράφησης μιας παράκτιας περιοχής με την χρήση μη επανδρωμένων εναέριων μέσων. Χρησιμοποιήθηκε ένα Unmanned Aerial Vehicle (UAV) της εταιρείας Sensefly για την αεροφωτογράφηση και το λογισμικό Pix4d για την παραγωγή ψηφιακού μοντέλου εδάφους και ορθομωσαϊκού. Επιλύθηκαν και εφαρμόστηκαν με την βοήθεια του ορθομωσαϊκού οι διανομές του Υπουργείου Γεωργίας, διαγράμματα τα οποία καθορίζουν και τα όρια των ιδιοκτησιών στην συγκεκριμένη περιοχή, ενώ στο λογισμικό Erdas Imagine πραγματοποιήθηκε η συγχώνευση του ορθομωσαϊκού, με μια πολυφασματική εικόνα του δορυφόρου WorldView 2, με σκοπό τον καθορισμό του φυσικού ορίου βλάστησης. Παράλληλα πραγματοποιήθηκε και μια χαρτογράφηση του βυθού, για την δημιουργία ισοβαθών. Από την δισδιάστατη αλλά και τρισδιάστατη απεικόνιση των παραπάνω δεδομένων, καθορίστηκαν η ακτογραμμή, καθώς και οι οριογραμμές αιγιαλού, παραλίας και παλαιού αιγιαλού. Τα αποτελέσματα αναδεικνύουν τα πλεονεκτήματα των νέων τεχνολογιών και πως μπορούν θετικά να προσφέρουν, τόσο στην υπηρεσία του Τοπογράφου Μηχανικού, όσο και στην προσπάθεια αναβάθμισης των δημόσιων υπηρεσιών και επίσπευσης διάφορων διαδικασιών και διοικητικών πράξεων.
description: Through this paper an effort was made to map a coastal area in N. Potidea Chalkidikis, with the use of Unmanned Aerial Vehicles. A UAV of the company Sensefly was used for the aerial photography, while the software Pix4d was used to produce the Digital Surface Model (DSM) and the orthomosaic. With the aid of the orthomosaic were determined the exact boundaries of the parcels, as they were granted through the topographic diagrams of the Ministry of Agriculture. Through the software Erdas Imagine was made a data fusion of the orthomosaic with a multispectral satellite image of WorldView 2, in order to determine the natural boundary of the vegetation. At the same time a sounding took place in order to create depth contours. Through the 2d and 3d representation of all the above data, were defined the coastline, the seashore line and the backshore zone. The results highlight the advantages of new technologies and how they can positively contribute, both in the Surveying Engineering department, and in the effort to upgrade public services and accelerate various procedures and administrative acts.
Anderson localization problem: an exact solution for 2-D anisotropic systems
Creators: name: Kuzovkov, V. N.
name: von Niessen, W.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: FOS: Physical sciences

description: Our previous results [J.Phys.: Condens. Matter 14 (2002) 13777] dealing with the analytical solution of the two-dimensional (2-D) Anderson localization problem due to disorder is generalized for anisotropic systems (two different hopping matrix elements in transverse directions). We discuss the mathematical nature of the metal-insulator phase transition which occurs in the 2-D case, in contrast to the 1-D case, where such a phase transition does not occur. In anisotropic systems two localization lengths arise instead of one length only.
description: 16 pages, Physica A (accepted)
Generalized Global Defect Solutions
Creators: name: Bazeia, D.
name: Losano, L.
name: Menezes, R.
name: Oliveira, J. C. R. E.
Publisher: name: arXiv
Year: 2007
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We investigate the presence of defect structures in generalized models described by real scalar field in $(1,1)$ space-time dimensions. We work with two distinct generalizations, one in the form of a product of functions of the field and its derivative, and the other as a sum. We search for static solutions and study the corresponding linear stability on general grounds. We illustrate the results with several examples, where we find stable defect structures of modified profile. In particular, we show how the new defect solutions may give rise to evolutions not present in the standard scenario in higher spatial dimensions.
description: RevTex, 10 pages, 2 figures; version to appear in EPJC