cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
title: Χρήση νέων τεχνολογιών στο εργασιακό περιβάλλον εν καιρώ πανδημίας : η περίπτωση της Metaverse
title: Use of new technologies in the workplace during the pandemic : the case of Metaverse
titleType: AlternativeTitle
Creators: name: Μπάρκουλας, Σταύρος
Publisher: name: Πανεπιστήμιο Πειραιώς
Year: 2023
Subjects: subject: Μέσα κοινωνικής δικτύωσης
subject: Νέες τεχνολογίες
subject: Εργασιακό περιβάλλον
subject: Metaverse
subject: Ποιότητα εργασίας

description: Η πανδημία του COVID-19 και τα επακόλουθα αντίμετρα απαιτούν από τις επιχειρήσεις να επιταχύνουν τις προσπάθειές για ψηφιακό μετασχηματισμό με απώτερο σκοπό την εξασφάλιση της βιωσιμότητας και της ευημερίας. Η χρήση των νέων τεχνολογιών και ιδιαίτερα των μέσων κοινωνικής δικτύωσης στο εργασιακό περιβάλλον έχουν κεντρίσει το ερευνητικό ενδιαφέρον τόσο των ακαδημαϊκών όσο και των επαγγελματιών του κλάδου της διοίκησης. Ωστόσο, υφίσταται έλλειψη συστηματικών ερευνών που αναδεικνύουν τόσο τα θετικά όσο και τα αρνητικά αποτελέσματα της χρήσης των μέσων κοινωνικής δικτύωσης στις συμπεριφορές των εργαζομένων στο εργασιακό περιβάλλον. Αυτό το κενό στη βιβλιογραφία καλύπτει η παρούσα διπλωματική εργασία διεξάγοντας συστηματική βιβλιογραφική ανασκόπηση σε δείγμα 32 άρθρων που έχουν δημοσιευτεί την περίοδο 2013-2023. Επίσης, διενεργήθηκε μελέτη περίπτωσης στον όμιλο Meta(verse) που δραστηριοποιείται στην αγορά των μέσων κοινωνικής δικτύωσης. Τα ευρήματα έδειξαν ότι η χρήση των πλατφορμών κοινωνικής δικτύωσης συνδέεται άμεσα ή έμμεσα με την εργασιακή απόδοση, την εργασιακή ικανοποίηση, την εργασιακή δέσμευση και την πρόθεση αποχώρηση από την επιχείρηση. Παράλληλα, εντοπίστηκε άμεση ή έμμεση σύνδεση με παράγοντες που αφορούν την ψυχολογία των εργαζομένων (π.χ. ψυχική ευημερία, επαγγελματική εξουθένωση, συγκρούσεις κλπ), την κοινωνικότητα (π.χ. κοινωνικοί δεσμοί), το οργανωσιακό περιβάλλον της επιχείρησης (π.χ. εμπιστοσύνη, κοινό όραμα), καθώς και τη διαχείριση γνώσης (π.χ. μετάδοση γνώσης). Τόσο τα εταιρικά (ESM) όσο και δημόσια μέσα κοινωνικής δικτύωσης έχουν αρνητικές ή θετικές συνέπειες στην ευημερία των εργαζομένων και των οργανισμών. Εντούτοις, διαπιστώθηκε ότι αυτά τα ευρήματα διαφοροποιούνται ανάλογα με τον τύπο χρήσης (π.χ. σχετική με την εργασία, κοινωνική χρήση, ψυχαγωγική χρήση κλπ), την ένταση χρήσης, το πλαίσιο χρήσης και τις προσωπικές συνθήκες χρήσης (π.χ. ενσυνειδητότητα). 4 Σύμφωνα με την μελέτη περίπτωσης, η Meta(verse) αποτελεί ηγέτη της αγοράς ελέγχοντας τις τέσσερεις μεγαλύτερες πλατφόρμες κοινωνικής δικτύωσης με σημαντικά περιθώρια μελλοντικής εξέλιξης. Οι δυνατότητες που παρέχει ο όμιλος μπορούν να αξιοποιηθούν από τις επιχειρήσεις για να βελτιώσουν την ποιότητα εργασίας των εργαζομένων τους. Τέλος, βάσει των ευρημάτων της παρούσας διπλωματικής προτείνονται στρατηγικές προς υπεύθυνους χάραξης πολιτικής και ανώτατα στελέχη για την αποδοτικότερη ένταξη των μέσων κοινωνικής δικτύωσης στο εργασιακό περιβάλλον.
A Characterization of Lyapunov Inequalities for Stability of Switched Systems
Creators: name: Jungers, Raphael M.
name: Ahmadi, Amirali
name: Parrilo, Pablo
name: Roozbehani, Mardavij
Publisher: name: arXiv
Year: 2016
Subjects: subject: Optimization and Control (math.OC)
subject: FOS: Mathematics

description: We study stability criteria for discrete-time switched systems and provide a meta-theorem that characterizes all Lyapunov theorems of a certain canonical type. For this purpose, we investigate the structure of sets of LMIs that provide a sufficient condition for stability. Various such conditions have been proposed in the literature in the past fifteen years. We prove in this note that a family of languagetheoretic conditions recently provided by the authors encapsulates all the possible LMI conditions, thus putting a conclusion to this research effort. As a corollary, we show that it is PSPACE-complete to recognize whether a particular set of LMIs implies stability of a switched system. Finally, we provide a geometric interpretation of these conditions, in terms of existence of an invariant set.
description: arXiv admin note: text overlap with arXiv:1201.3227
ImmFusion: Robust mmWave-RGB Fusion for 3D Human Body Reconstruction in All Weather Conditions
Creators: name: Chen, Anjun
name: Wang, Xiangyu
name: Shi, Kun
name: Zhu, Shaohao
name: Fang, Bin
name: Chen, Yingfeng
name: Chen, Jiming
name: Huo, Yuchi
name: Ye, Qi
Publisher: name: arXiv
Year: 2022
Subjects: subject: Computer Vision and Pattern Recognition (cs.CV)
subject: FOS: Computer and information sciences

description: 3D human reconstruction from RGB images achieves decent results in good weather conditions but degrades dramatically in rough weather. Complementary, mmWave radars have been employed to reconstruct 3D human joints and meshes in rough weather. However, combining RGB and mmWave signals for robust all-weather 3D human reconstruction is still an open challenge, given the sparse nature of mmWave and the vulnerability of RGB images. In this paper, we present ImmFusion, the first mmWave-RGB fusion solution to reconstruct 3D human bodies in all weather conditions robustly. Specifically, our ImmFusion consists of image and point backbones for token feature extraction and a Transformer module for token fusion. The image and point backbones refine global and local features from original data, and the Fusion Transformer Module aims for effective information fusion of two modalities by dynamically selecting informative tokens. Extensive experiments on a large-scale dataset, mmBody, captured in various environments demonstrate that ImmFusion can efficiently utilize the information of two modalities to achieve a robust 3D human body reconstruction in all weather conditions. In addition, our method's accuracy is significantly superior to that of state-of-the-art Transformer-based LiDAR-camera fusion methods.
description: Accepted to ICRA2023, Project Page: https://chen3110.github.io/ImmFusion/index.html
Online learning of the transfer matrix of dynamic scattering media: wavefront shaping meets multidimensional time series
Creators: name: Valzania, Lorenzo
name: Gigan, Sylvain
Publisher: name: arXiv
Year: 2022
Subjects: subject: Optics (physics.optics)
subject: Signal Processing (eess.SP)
subject: FOS: Physical sciences
subject: FOS: Electrical engineering, electronic engineering, information engineering

description: Thanks to the latest advancements in wavefront shaping, optical methods have proven crucial to achieve imaging and control light in multiply scattering media, like biological tissues. However, the stability times of living biological specimens often prevent such methods from gaining insights into relevant functioning mechanisms in cellular and organ systems. Here we present a recursive and online optimization routine, borrowed from time series analysis, to optimally track the transfer matrix of dynamic scattering media over arbitrarily long timescales. While preserving the advantages of both optimization-based routines and transfer-matrix measurements, it operates in a memory-efficient manner. Because it can be readily implemented in existing wavefront shaping setups, featuring amplitude and/or phase modulation and phase-resolved or intensity-only acquisition, it paves the way for efficient optical investigations of living biological specimens.
Structure of Herbig AeBe disks at the milliarcsecond scale A statistical survey in the H band using PIONIER-VLTI
Creators: name: Lazareff, B.
name: Berger, J. -P.
name: Kluska, J.
name: Bouquin, J. -B. Le
name: Benisty, M.
name: Malbet, F.
name: Koen, C.
name: Pinte, C.
name: Thi, W. -F.
name: Absil, O.
name: Baron, F.
name: Delboulbé, A.
name: Duvert, G.
name: Isella, A.
name: Jocou, L.
name: Juhasz, A.
name: Kraus, S.
name: Lachaume, R.
name: Ménard, F.
name: Millan-Gabet, R.
name: Monnier, J. D.
name: Moulin, T.
name: Perraut, K.
name: Rochat, S.
name: Soulez, F.
name: Tallon, M.
name: Thiébaut, E.
name: Traub, W.
name: Zins, G.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: Context. It is now generally accepted that the near-infrared excess of Herbig AeBe stars originates in the dust of a circumstellar disk. Aims. The aims of this article are to infer the radial and vertical structure of these disks at scales of order one au, and the properties of the dust grains. Methods. The program objects (51 in total) were observed with the H-band (1.6micron) PIONIER/VLTI interferometer. The largest baselines allowed us to resolve (at least partially) structures of a few tenths of an au at typical distances of a few hundred parsecs. Dedicated UBVRIJHK photometric measurements were also obtained. Spectral and 2D geometrical parameters are extracted via fits of a few simple models: ellipsoids and broadened rings with azimuthal modulation. Model bias is mitigated by parallel fits of physical disk models. Sample statistics were evaluated against similar statistics for the physical disk models to infer properties of the sample objects as a group. Results. We find that dust at the inner rim of the disk has a sublimation temperature Tsub~1800K. A ring morphology is confirmed for approximately half the resolved objects; these rings are wide delta_r>=0.5. A wide ring favors a rim that, on the star-facing side, looks more like a knife edge than a doughnut. The data are also compatible with a the combination of a narrow ring and an inner disk of unspecified nature inside the dust sublimation radius. The disk inner part has a thickness z/r~0.2, flaring to z/r~0.5 in the outer part. We confirm the known luminosity-radius relation; a simple physical model is consistent with both the mean luminosity-radius relation and the ring relative width; however, a significant spread around the mean relation is present. In some of the objects we find a halo component, fully resolved at the shortest interferometer spacing, that is related to the HAeBe class.
description: 41 pages. 23 figures. Four appendices
Aspects of home-based leisure in Selby, Victoria, 1986
Creators: name: Sahib, M. H. .
Publisher: name: Monash University
Year: 2022

description: This thesis was scanned from the print manuscript for digital preservation and is copyright the author.
 Researchers can access this thesis by asking their local university, institution or public library to
 make a request on their behalf. Monash staff and postgraduate students can use the link in the References field.
title: Η επίδραση των κοινωνικών ρομπότ στην κατανόηση ιστοριών από μαθητές της ειδικής αγωγής στη προσχολική εκπαίδευση
title: The effect of social robots on the comprehension of stories by special education students in preschool education
titleType: AlternativeTitle
Creators: name: Μουλά, Ιωάννα
Publisher: name: Πανεπιστήμιο Δυτικής Αττικής
Year: 2023
Subjects: Ειδική αγωγή
Συμπερίληψη
Ανθρωποειδές ρομπότ «ΝΑΟ»
Κατανόηση παραμυθιού

description: Εισαγωγή: Αντικείμενο της έρευνας αυτής αποτελεί η αξιοποίηση του κοινωνικού ρομπότ «Ναό» στην διήγηση ιστοριών σε παιδιά προσχολικής εκπαίδευσης της ειδικής αγωγής. Για την επίτευξή της έρευνας είχαν προγραμματιστεί να υλοποιηθούν πέντε διδακτικές παρεμβάσεις, των οποίων τα αποτελέσματα θα συγκρίνονταν στο τέλος. Κατά την πρώτη παρέμβαση, την διήγηση της ιστορίας ανέλαβε η εκπαιδευτικός της τάξης, ενώ κατά την τέταρτη, το «ΝΑΟ». Και στις δυο διαδικασίες θα ακολουθούσαν ατομικές συνεντεύξεις των μαθητών με την ερευνήτρια (δεύτερη και πέμπτη παρέμβαση), των οποίων οι ερωτήσεις θα είχαν ως στόχο την διαπίστωση κατανόησης των ιστοριών. Στη τρίτη παρέμβαση θα παρουσιαζόταν το ρομπότ μέσα από τον ηλεκτρονικό υπολογιστή ώστε να προ-ετοιμάσει τους μαθητές για την επίσκεψή του, στο νηπιαγωγείο τους. Λόγω τεχνικών προβλημάτων του ΝΑΟ, δεν υλοποιήθηκαν οι δραστηριότητες της παρουσίασης του, η διήγησης ιστορίας από εκείνον καθώς και η συνέντευξη που θα ακολουθούσε. Σκοπός: Η διερεύνηση της επίδρασης των κοινωνικών ρομπότ (ΝΑΟ) στην κατανόηση ιστοριών από μαθητές της ειδικής αγωγής στην πρωτοβάθμια εκπαίδευση. Μέθοδος: : Είχε προγραμματιστεί η συλλογή δεδομένων μέσα από τη χρήση συνεντεύξεων, ζωγραφιών, ρουμπρικών αξιολόγησης και εν συνεχεία επεξεργασία και ανάλυση τους (Εικόνα 1α). Λόγω των συνθηκών συλλέχτηκαν τα πρώτα δεδομένα που αφορούσαν την διήγηση του παραμυθιού από τη νηπιαγωγό της τάξης και εν συνεχεία έγινε παράθεση προηγούμενων ερευνών και των αποτελεσμάτων τους (Εικόνα 1β). Αποτελέσματα: Σύγκριση των χαρακτηριστικών που διέπουν τα παιδιά που εντάσσονται στο Τμήμα Ένταξης με τα αποτελέσματα ερευνών που έχουν πραγματοποιηθεί στο παρελθόν και εξαγωγή υποθετικών αποτελεσμάτων. Συμπεράσματα: Το ΝΑΟ με τη κατάλληλη χρήση μπορεί να συμβάλει στην καλύτερη κατανόηση ενός παραμυθιού από τα παιδιά της ειδικής αγωγής στη προσχολική εκπαίδευσή.
A Bayesian analysis of the time through the order penalty in baseball
Creators: name: Brill, Ryan S.
name: Deshpande, Sameer K.
name: Wyner, Abraham J.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Applications (stat.AP)
subject: FOS: Computer and information sciences

description: As a baseball game progresses, batters appear to perform better the more times they face a particular pitcher. The apparent drop-off in pitcher performance from one time through the order to the next, known as the Time Through the Order Penalty (TTOP), is often attributed to within-game batter learning. Although the TTOP has largely been accepted within baseball and influences many managers' in-game decision making, we argue that existing approaches of estimating the size of the TTOP cannot disentangle continuous evolution in pitcher performance over the course of the game from discontinuities between successive times through the order. Using a Bayesian multinomial regression model, we find that, after adjusting for confounders like batter and pitcher quality, handedness, and home field advantage, there is little evidence of strong discontinuity in pitcher performance between times through the order. Our analysis suggests that the start of the third time through the order should not be viewed as a special cutoff point in deciding whether to pull a starting pitcher.
description: Accepted to JQAS
China's increasing contributions to global mental health research: A scoping review
Creators: name: Su, Ying
name: Li, Yaxi
name: Bueber, Marlys
name: Fei, Deng
name: Liu, Zhaorui
name: Luo, Guoshuai
name: Li, Xuping
name: Yanan, Luo
name: Dongyang, Liu
name: Phillips, Michael
Publisher: name: Open Science Framework
Year: 2022
Subjects: subject: Medicine and Health Sciences
subject: Life Sciences
subject: Social and Behavioral Sciences

description: The volume of scientific research from China has increased dramatically over the last 30 years. The quality of this research has also improved, though at a somewhat slower rate. In several fields, cutting-edge research conducted in China is making significant contributions to the global corpus of knowledge in their respective disciplines. However, the extent to which this is the case for mental health research is unclear. A scoping review is needed to clarify China's contribution to and influence on global mental health research. This review will identify all English-language research articles and reviews about mental health issues available on the Science Citation Index (SCI) and the Social Science Citation Index (SSCI) databases of Scopus from 1990 to 2021 and conduct three types of analyses on these articles: 1) comparison of the annual proportions and characteristics of documents from (a) institutions in Greater China (i.e., mainland China, Taiwan, Hong Kong, or Macau), (b) institutions in both China and other countries (i.e., international collaborative projects in which Chinese institutions participate), and (c) institutions in countries other than China; 2) comparison of the characteristics and citation counts of a random selection of 30 documents (15 classified in Scopus as an 'article' and 15 classified as a 'review') from each of the three sources of documents (i.e., 'China', 'China+Other', 'Other') for each of the 32 years; and 3) the specific contribution of the five most highly cited articles and five most highly cited reviews from each of the three sources of documents for each of the 32 years. This review will clarify the trajectory in the volume and quality of China's internationally available research about different types of mental health-related issues and provide detailed descriptions of its most important contributions to the field.
Solitons and hairy black holes in Einstein-non-Abelian-Proca theory in anti-de Sitter space-time
Creators: name: Ponglertsakul, Supakchai
name: Winstanley, Elizabeth
Publisher: name: arXiv
Year: 2016
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We present new soliton and hairy black hole solutions of Einstein-non-Abelian-Proca theory in asymptotically anti-de Sitter space-time with gauge group ${\mathfrak {su}}(2)$. For static, spherically symmetric configurations, we show that the gauge field must be purely magnetic, and solve the resulting field equations numerically. The equilibrium gauge field is described by a single function $ω(r)$, which must have at least one zero. The solitons and hairy black holes share many properties with the corresponding solutions in asymptotically flat space-time. In particular, all the solutions we study are unstable under linear, spherically symmetric, perturbations of the metric and gauge field.
description: 23 pages, 16 figures, typos corrected, version accepted for publication in Physical Review D
title: Το Επιτραπέζιο Παιχνίδι και οι Επιδράσεις του στην Κοινωνική Συμπεριφορά των Παιδιών Προσχολικής Ηλικίας
title: The Board Game and its Effects on the Social Behavior of Preschool Children
titleType: AlternativeTitle
Creators: name: Μάρκου, Ξανθή
Publisher: name: Πανεπιστήμιο Δυτικής Αττικής
Year: 2023
Subjects: Παιχνίδι
Προσχολική ηλικία
Κοινωνικές δεξιότητες
Επιτραπέζια
Κανόνες
Συμπεριφορά

description: Η παρούσα διπλωματική εργασία, εξετάζει τις επιπτώσεις των επιτραπέζιων παιχνιδιών στην κοινωνική συμπεριφορά των παιδιών προσχολικής ηλικίας. Η εργασία υπογραμμίζει τη σημασία της κοινωνικής ανάπτυξης κατά την περίοδο της πρώιμης παιδικής ηλικίας και τα πιθανά οφέλη του επιτραπέζιου παιχνιδιού στην ενίσχυση των κοινωνικών δεξιοτήτων. Ο σκοπός της ανασκόπησης αυτής είναι να συνθέσει υπάρχουσα έρευνα για να προσδιορίσει την επίδραση των επιτραπέζιων παιχνιδιών στην κοινωνική συμπεριφορά των παιδιών προσχολικής ηλικίας. Ειδικότερα, σκοπός της εργασίας είναι η ενίσχυση των στάσεων και απόψεων των εκπαιδευτικών όσον αφορά τη χρήση του επιτραπέζιου παιχνιδιού στην εκπαιδευτική διαδικασία, προκειμένου να θεωρηθεί ένα χρήσιμο εργαλείο τόσο για τη γνωστική όσο και για την κοινωνικο-συναισθηματική ανάπτυξη των παιδιών. Πρόκειται για μια ολοκληρωμένη βιβλιογραφική αναζήτηση, συμπεριλαμβανομένων μελετών που δημοσιεύθηκαν έως πρόσφατα. Πραγματοποιήθηκε εκτεταμένη μελέτη στην διεθνή κι ελληνική βιβλιογραφία και αρθρογραφία. Η αναζήτηση κατέληξε σε μια επιλογή από μελέτες που διερεύνησαν συγκεκριμένα τις επιπτώσεις των επιτραπέζιων παιχνιδιών στην κοινωνική συμπεριφορά των παιδιών προσχολικής ηλικίας. Τα αποτελέσματα της ανασκόπησης υποδηλώνουν ότι το επιτραπέζιο παιχνίδι μπορεί να έχει θετικές επιδράσεις σε διάφορες πτυχές της κοινωνικής συμπεριφοράς, συμπεριλαμβανομένων των δεξιοτήτων επικοινωνίας, της συνεργασίας και της συναισθηματικής ρύθμισης. Επιπλέον, η ενασχόληση με επιτραπέζια παιχνίδια μπορεί να προωθήσει την ανάπτυξη φιλοκοινωνικών συμπεριφορών, όπως η ανταλλαγή, η ενσυναίσθηση και οι ικανότητες επίλυσης προβλημάτων. Ωστόσο, είναι σημαντικό να σημειωθεί ότι η αποτελεσματικότητα των επιτραπέζιων παιχνιδιών στην προώθηση της κοινωνικής συμπεριφοράς μπορεί να επηρεαστεί από παράγοντες όπως η πολυπλοκότητα του παιχνιδιού, η συμμετοχή των ενηλίκων και η ποιότητα των κοινωνικών αλληλεπιδράσεων κατά τη διάρκεια του παιχνιδιού. Συμπερασματικά, τα επιτραπέζια παιχνίδια δείχνουν υπόσχεση ως εργαλεία ενίσχυσης της κοινωνικής συμπεριφοράς των παιδιών προσχολικής ηλικίας. Η ενσωμάτωση επιτραπέζιων παιχνιδιών σε εκπαιδευτικά περιβάλλοντα πρώιμης παιδικής ηλικίας και οικιακά περιβάλλοντα μπορεί να προσφέρει ευκαιρίες για κοινωνική αλληλεπίδραση και ανάπτυξη δεξιοτήτων. Η μελλοντική έρευνα θα πρέπει να εστιάσει σε διαχρονικές μελέτες και να διερευνήσει τις βέλτιστες συνθήκες για τη μεγιστοποίηση των κοινωνικών οφελών του επιτραπέζιου παιχνιδιού σε παιδιά προσχολικής ηλικίας.
Information for citizen conservationists : support for nature reserves on private land
Creators: name: Gray, Kathleen.
Publisher: name: Monash University
Year: 2022

description: This thesis was scanned from the print manuscript for digital preservation and is copyright the author.
 Researchers can access this thesis by asking their local university, institution or public library to
 make a request on their behalf. Monash staff and postgraduate students can use the link in the References field.
Neighborhood Structure Configuration Models
Creators: name: Stamm, Felix I.
name: Scholkemper, Michael
name: Strohmaier, Markus
name: Schaub, Michael T.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Social and Information Networks (cs.SI)
subject: FOS: Computer and information sciences

description: We develop a new method to efficiently sample synthetic networks that preserve the d-hop neighborhood structure of a given network for any given d. The proposed algorithm trades off the diversity in network samples against the depth of the neighborhood structure that is preserved. Our key innovation is to employ a colored Configuration Model with colors derived from iterations of the so-called Color Refinement algorithm. We prove that with increasing iterations the preserved structural information increases: the generated synthetic networks and the original network become more and more similar, and are eventually indistinguishable in terms of centrality measures such as PageRank, HITS, Katz centrality and eigenvector centrality. Our work enables to efficiently generate samples with a precisely controlled similarity to the original network, especially for large networks.
Assessment of Effectiveness of Insecticide Treated Bednets for Malaria Prevention in Under-five Children of Aletawondo Woreda, Southern Ethiopia
Creators: name: Wassie, Eshetu
Publisher: name: National Academic Digital Repository of Ethiopia
Year: 2005

description: Background: A Meta analysis of all randomized controlled trials showed that insecticide treated net use has an overall protective efficacy against all -causes of child mortality and malaria disease episodes of 18% and 50%, respectively. Frequent washing, lack of retreatment, inconsistent use, other social and technical factors were shown to influence efficacy of bednets at field trials. To date, however, experience with local factors influencing the effectiveness of ITN programs remains very limited and it is not known whether the impact of treated nets in the context of well controlled randomized trials can be replicated under program conditions in all set-ups. Objective: To assess the effectiveness and influencing factors of ITNs in preventing clinical malaria in under five children in Aletawondo Woreda, Sidama Zone, SNNPR. Methods: A community based retrospective cohort study was conducted on a sample of 342 under five children (171 exposed and 171 unexposed/comparison group) residing in Chucko Town & surrounding rural kebeles where there was ITN distribution. A precoded, pretested structured questionnaire was employed to obtain the necessary information after getting both written and verbal consent from the concerned bodies. The collected data was daily checked for completeness and consistency and it was entered into computer database. An internal comparison was also conducted to assess factors influencing effectiveness of bednets among those with history of malaria (cases) and without history of the disease within the exposed cohort. Other appropriate statistical tests were done and interpretations were made accordingly. Result: The history of malaria attack from September to December 2004 among reported regular ITNs users was 43.5% less than in those who didn't use/own bednet. This was statistically significant (OR=0.565 95%CI 0.346-0.925 p=0.023). The household factors that were found to influence the effectiveness of ITNs were large family size, keeping livestock inside living room, using a bednet obtained a year or more, absence of retreatment of the bednet for more than 12 months, presence of hole/tears in the bednet, frequently washing the bednet and reported history of rolling out of the child from the bednet during night time. Conclusions & Recommendations: Despite lots of programmatic deficiencies, ITNs are effective in preventing clinical malaria in under-five children. Based on these, appropriate recommendations are forwarded. Key Words: (Clinical malaria, Under -five child, Insecticide treated mosquito net use, Effectiveness, retrospective cohort, nested case control Design, Influencing household factor)
The potential for the inclusion of recycling education in Victorian schools
Creators: name: McCann, D. .
Publisher: name: Monash University
Year: 2022

description: This thesis was scanned from the print manuscript for digital preservation and is copyright the author.
 Researchers can access this thesis by asking their local university, institution or public library to
 make a request on their behalf. Monash staff and postgraduate students can use the link in the References field.
Quantum-State Controlled Penning Ionization Reactions between Ultracold Alkali and Metastable Helium Atoms
Creators: name: Flores, Adonis Silva
name: Vassen, Wim
name: Knoop, Steven
Publisher: name: arXiv
Year: 2016
Subjects: subject: Quantum Gases (cond-mat.quant-gas)
subject: Atomic Physics (physics.atom-ph)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: In an ultracold, optically trapped mixture of $^{87}$Rb and metastable triplet $^4$He atoms we have studied trap loss for different spin-state combinations, for which interspecies Penning ionization is the main two-body loss process. We observe long trapping lifetimes for the purely quartet spin-state combination, indicating strong suppression of Penning ionization loss by at least two orders of magnitude. For the other spin-mixtures we observe short lifetimes that depend linearly on the doublet character of the entrance channel. We compare the extracted loss rate coefficient with recent predictions of multichannel quantum-defect theory for reactive collisions involving a strong exothermic loss channel and find near-universal loss for doublet scattering. Our work demonstrates control of reactive collisions by internal atomic state preparation.
description: 5 pages, 5 figures + Supplemental Materials
On optimal joint reflective and refractive dividend strategies in spectrally positive Lévy models
Creators: name: Avanzi, Benjamin
name: Pérez, José-Luis
name: Wong, Bernard
name: Yamazaki, Kazutoshi
Publisher: name: arXiv
Year: 2016
Subjects: subject: Optimization and Control (math.OC)
subject: Probability (math.PR)
subject: Risk Management (q-fin.RM)
subject: FOS: Mathematics
subject: FOS: Economics and business
subject: 60G51, 93E20, 91B30

description: The expected present value of dividends is one of the classical stability criteria in actuarial risk theory. In this context, numerous papers considered threshold (refractive) and barrier (reflective) dividend strategies. These were shown to be optimal in a number of different contexts for bounded and unbounded payout rates, respectively. In this paper, motivated by the behaviour of some dividend paying stock exchange companies, we determine the optimal dividend strategy when both continuous (refractive) and lump sum (reflective) dividends can be paid at any time, and if they are subject to different transaction rates. We consider the general family of spectrally positive Lévy processes. Using scale functions, we obtain explicit formulas for the expected present value of dividends until ruin, with a penalty at ruin. We develop a verification lemma, and show that a two-layer (a,b) strategy is optimal. Such a strategy pays continuous dividends when the surplus exceeds level a>0, and all of the excess over b>a as lump sum dividend payments. Results are illustrated.
description: Forthcoming in Insurance: Mathematics and Economics
Proximity-induced equilibrium supercurrent and perfect superconducting diode effect due to band asymmetry
Creators: name: Hosur, Pavan
name: Palacios, Daniel
Publisher: name: arXiv
Year: 2022
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 theoretically investigate the consequences of proximity-induced conventional superconductivity in metals that break time-reversal and inversion symmetries through their energy dispersion. We discover behaviors impossible in an isolated superconductor such as an equilibrium supercurrent that apparently violates a no-go theorem and, at suitable topological defects, non-conservation of electric charge reminiscent of the chiral anomaly. The equilibrium supercurrent is expected to be trainable by a helical electromagnetic field in the normal state. Remarkably, if the band asymmetry exceeds the critical current of the parent superconductor in appropriate units, we predict a perfect superconducting diode effect with diode coefficient unity. We propose toroidal metals such as UNi$_{4}$B and metals with directional scalar spin chiral order as potential platforms.
description: 7+2 pages, 3 figures. Added result on perfect superconducting diode effect without fine-tuning
New concept for pairing anti-halo effect as a localized wave packet of quasi-particle
Creators: name: Hagino, K.
name: Sagawa, H.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Nuclear Theory (nucl-th)
subject: Nuclear Experiment (nucl-ex)
subject: FOS: Physical sciences

description: The pairing anti-halo effect is a phenomenon that a pairing correlation suppresses a divergence of nuclear radius, which happens for single-particle states with orbital angular momenta of $l$ = 0 and 1 in the limit of vanishing binding energy. While this effect has mainly been discussed in terms of Hartree-Fock-Bogoliubov (HFB) theory, we here use a three-body model and provide its new intuitive concept as a localized wave packet for a quasi-particle, that is, a coherent superposition of a weakly bound and continuum wave functions due to a pairing interaction. We show that the one-particle density in the three-body model can be directly expressed with such quasi-particle wave functions, which have a close analog to wave functions in the HFB approximation.
description: 6 pages, 3 figures
Algorithmische Analyse von rohrförmigen Flächen für das Reverse Engineering
Creators: name: Wortmann, Christian
Publisher: name: Technische Universität Dortmund
Year: 2008
Subjects: subject: rohrförmige Fläche
subject: algorithmische Analyse
subject: Leitlinie
subject: U-Spline-Approximation
subject: Schlaucheinpassung
subject: Schlauchförmige Fläche
subject: reverse engineering
subject: 004

description: This dissertation presents a method for planning the manufacturing of pipes from straight cylinders. On the one hand, this allows for feasibility studies by simulation and analysis of the strain on the cylinder during the manufacturing process. This is done before a pipe is created. On the other hand, planning may be used as input for manufacturing machines used by the industry. A possible approach is to start with the result, i.e. the desired pipe, to get the initial situation, i.e. the cylinder. This is done by reverse engineering the manufacturing operations. Here the following problems can be determined: - Integration of pipes, i.e. the approximation of the pipe by a tube. A tube is a deformed and bent cylinder. - Approximation of spatial curves by circular splines i.e. a G1 continuous curve which is a consecutive combination of arcs and lines. This dissertation starts with a mathematical definition of pipes and the needed theoretical basis, for example the definition of part-pipes. Based on this, the pipe-tube-approximation problem is formulated as a multicriterial optimization problem which is orientated at the elastic contours of the image processing. Two solutions are presented for the optimization problem. The first one uses dynamic programming, the second one is an adaptive segmentation which is a well known approximation method of curves by polygons. The advantage of the adaptive segmentation is the low run-time. The disadvantage is that a success is not guaranteed, in contrast to dynamic programming. Some methods for basic geometrical operations are presented, which are required to achieve an efficient implementation. Both optimization methods are analyzed. On the one hand, theoretical conditions are presented to guarantee the success of adaptive segmentation. On the other hand, analysis is based on experimental evaluation. It will be shown that both methods yield good results for pipes used in the industry. However, neither provide fully automatic solutions for the practical domain of application. Suggestions are made to handle this complex problem. The definition of a "U-spline-curve" is presented to describe the curve approximation. The aim of a U-spline-curve is to contain as few segments as possible. Therefore, two heuristics are presented. The first one uses adaptive segmentation which is based on the curvature of the curve. The second one is based on a well known algorithm which creates an arc-spline-curve with a minimal number of segments. It will be shown that both methods yield equal results when applied to pipes used in the industry.
title: Διαχείριση συγκρούσεων και στυλ ηγεσίας
title: Conflict management and leadership style
titleType: AlternativeTitle
Creators: name: Κοτσαντώνης, Κωνσταντίνος
Publisher: name: Πανεπιστήμιο Δυτικής Αττικής
Year: 2023
Subjects: Ηγεσία
Στυλ ηγεσίας
Συναισθηματική νοημοσύνη
Οργανωσιακή συμπεριφορά
Διαχείριση συγκρούσεων
Leadership
Conflict management

description: Η παρούσα διπλωματική ασχολείται με τη διαχείριση συγκρούσεων και το στυλ ηγεσίας. Το κύριο αντικείμενο της έρευνάς είναι να γίνει κατανοητό πώς οι ηγέτες μπορούν να αντιμετωπίζουν και να διαχειρίζονται αποτελεσματικά τις συγκρούσεις που προκύπτουν μέσα στον οργανισμό. Στο πλαίσιο της έρευνας, εξετάζεται ο τρόπος με τον οποίο οι ηγέτες αντιμετωπίζουν τις συγκρούσεις μεταξύ των μελών της ομάδας τους ή μεταξύ διαφορετικών ομάδων εντός του οργανισμού. Αναλύονται τις διάφορες προσεγγίσεις και στρατηγικές που μπορούν να χρησιμοποιηθούν για να επιλυθούν οι συγκρούσεις και να επιτευχθεί η συνεργασία και η ευθυγράμμιση των στόχων της οργάνωσης. Επιπλέον, εξετάζεται η σημασία του στυλ ηγεσίας στη διαχείριση των συγκρούσεων. Αναλύονται οι διάφορες προσεγγίσεις ηγεσίας και πώς μπορούν να επηρεάσουν τη δυναμική των συγκρούσεων. Εξετάζεται ο ρόλος της επικοινωνίας, της ενδυνάμωσης και της διαμεσολάβησης ως εργαλεία για την αντιμετώπιση των συγκρούσεων και την επίτευξη συνεργασίας. Η διπλωματική βασίζεται σε συστηματική έρευνα και ανάλυση δεδομένων, συμπεριλαμβανομένης της συλλογής πρωτογενών δεδομένων μέσω συνεντεύξεων και ερωτηματολογίων. Τα αποτελέσματα της έρευνάς θα προσφέρουν στους ηγέτες και τους διαχειριστές εργαλεία και πρακτικές για την αντιμετώπιση και διαχείριση των συγκρούσεων με έναν εποικοδομητικό τρόπο, προκειμένου να επιτευχθεί η αρμονία και η αποτελεσματική συνεργασία στον εκάστοτε οργανισμό.
On Newton-Cartan local renormalization group and anomalies
Creators: name: Auzzi, Roberto
name: Baiguera, Stefano
name: Filippini, Francesco
name: Nardelli, Giuseppe
Publisher: name: arXiv
Year: 2016
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: Weyl consistency conditions are a powerful tool to study the irreversibility properties of the renormalization group. We apply this formalism to non-relativistic theories in 2 spatial dimensions with boost invariance and dynamical exponent z=2. Different possibilities are explored, depending on the structure of the gravitational background used as a source for the energy-momentum tensor.
description: 22 pages; V2 refs. added
Quantum Gauge Networks: A New Kind of Tensor Network
Creators: name: Slagle, Kevin
Publisher: name: arXiv
Year: 2022
Subjects: subject: Quantum Physics (quant-ph)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: Although tensor networks are powerful tools for simulating low-dimensional quantum physics, tensor network algorithms are very computationally costly in higher spatial dimensions. We introduce quantum gauge networks: a different kind of tensor network ansatz for which the computation cost of simulations does not explicitly increase for larger spatial dimensions. We take inspiration from the gauge picture of quantum dynamics, which consists of a local wavefunction for each patch of space, with neighboring patches related by unitary connections. A quantum gauge network (QGN) has a similar structure, except the Hilbert space dimensions of the local wavefunctions and connections are truncated. We describe how a QGN can be obtained from a generic wavefunction or matrix product state (MPS). All $2k$-point correlation functions of any wavefunction for $M$ many operators can be encoded exactly by a QGN with bond dimension $O(M^k)$. In comparison, for just $k=1$, an exponentially larger bond dimension of $2^{M/6}$ is generically required for an MPS of qubits. We provide a simple QGN algorithm for approximate simulations of quantum dynamics in any spatial dimension. The approximate dynamics can achieve exact energy conservation for time-independent Hamiltonians, and spatial symmetries can also be maintained exactly. We benchmark the algorithm by simulating the quantum quench of fermionic Hamiltonians in up to three spatial dimensions.
description: 12+9 pages, 6+1 figures. v5 adds funding acknowledgements and is the published version
Composing decoherence functionals
Creators: name: Boes, Paul
name: Navascues, Miguel
Publisher: name: arXiv
Year: 2016
Subjects: subject: Quantum Physics (quant-ph)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: Quantum Measure Theory (QMT) is a generalization of quantum theory where physical predictions are computed from a matrix known as \emph{decoherence functional} (DF). Previous works have noted that, in its original formulation, QMT exhibits a problem with composability, since the composition of two decoherence functionals is, in general, not a valid decoherence functional. This does not occur when the DFs in question happen to be positive semidefinite (a condition known as strong positivity). In this paper, we study the concept of composability of DFs and its consequences for QMT. Firstly, we show that the problem of composability is much deeper than originally envisaged, since, for any $n$, there exists a DF that can co-exist with $n-1$ copies of itself, but not with $n$. Secondly, we prove that the set of strongly positive DFs cannot be enlarged while remaining closed under composition. Furthermore, any closed set of DFs containing all quantum DFs can only contain strongly positive DFs.
description: Modified abstract and conclusion in view of the overlap with [L. Diosi, Phys. Rev. Lett. 92, 170401 (2004)]
Utilization of PMTCT Services among Pregnant Women in Western Amhara Region
Creators: name: Worku, Tilahun
Publisher: name: National Academic Digital Repository of Ethiopia
Year: 2007

description: Background: Ethiopia is one of the countries hard-hit by HIV/AIDS. Amhara region has the largest proportion of HIV positive women, HIV positive live births and AIDS orphans. PMTCT programs are starting to be launched in many health facilities of the country. Thus it is imperative to study the utilization of the services by pregnant women to ensure programme effectiveness. Objectives: - The objective of this study was in general to determine the level of utilization of PMTCT program in western Amhara region and specifically to determine the level of antenatal VCT service utilization, to examine factors influencing acceptance of voluntary HIV counseling by pregnant women; and to explore client preferences and suggestions on PMTCT program implementation by which acceptance may be increased. Methodology: - A health facility based cross sectional survey was conducted using structured questionnaire among 452 pregnant women following antenatal care (ANC) at selected facilities of west Amhara region between April and June 2006. Four focus group discussions (among pregnant women not following ANC for the current pregnancy and spouses of pregnant women) and eight in-depth interviews (among traditional birth attendants and counselors) were conducted. Results: - Response rate was 98%. Three-hundred and four (67.3%) of the respondents had under gone the process of voluntary counseling and testing for HIV. Two hundred eighty-nine (97.6%) of them were tested for HIV and 274 (94.8%) of those who were tested received the test result. Of all the socio-demographic variables, education was positively associated with acceptance of ANC counseling (AOR (95% CI) for formal schooling Vs no formal schooling = 3.67 (1.56, 8.61)) while being a rural women and being a farmer were associated with less likelihood of undergoing HIV counseling in ANC [AOR (95%C.I.)= 0.22 (0.14, 0.35) and 0.44 (0.22, 0.98] respectively). Correct knowledge with respect to transmission of HIV during labor and that it can be prevented by chemotherapy were associated with higher likely hood of using PMTCT services. The main barriers for utilization of PMTCT services identified were incorrect perceptions regarding HIV/AIDS and stigma by husband, family and community. Conclusion: Based on the findings Community based education and sensitization targeted to women, increasing access of women to VCT, promoting PMTCT to all facilities caring for women in the catchments areas is recommended Key words: Pregnant women, PMTCT, VCT, HIV/AIDS, ANC, Ethiopia
Random unitaries, Robustness, and Complexity of Entanglement
Creators: name: Odavić, J.
name: Torre, G.
name: Mijić, N.
name: Davidović, D.
name: Franchini, F.
name: Giampaolo, S. M.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Quantum Physics (quant-ph)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: It is widely accepted that the dynamic of entanglement in presence of a generic circuit can be predicted by the knowledge of the statistical properties of the entanglement spectrum. We tested this assumption by applying a Metropolis-like entanglement cooling algorithm generated by different sets of local gates, on states sharing the same statistic. We employ the ground states of a unique model, namely the one-dimensional Ising chain with a transverse field, but belonging to different macroscopic phases such as the paramagnetic, the magnetically ordered, and the topological frustrated ones. Quite surprisingly, we observe that the entanglement dynamics are strongly dependent not just on the different sets of gates but also on the phase, indicating that different phases can possess different types of entanglement (which we characterize as purely local, GHZ-like, and W-state-like) with different degree of resilience against the cooling process. Our work highlights the fact that the knowledge of the entanglement spectrum alone is not sufficient to determine its dynamics, thereby demonstrating its incompleteness as a characterization tool. Moreover, it shows a subtle interplay between locality and non-local constraints.
description: 14 pages, 11 figures, 1 table
Einstein-Cartan Gravity with Torsion Field Serving as Origin for Cosmological Constant or Dark Energy Density
Creators: name: Ivanov, A. N.
name: Wellenzohn, M.
Publisher: name: arXiv
Year: 2016
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We analyse the Einstein-Cartan gravity in its standard form cal-R = R + cal-K^2, where cal-R and R are the Ricci scalar curvatures in the Einstein-Cartan and Einstein gravity, respectively, and cal-K^2 is the quadratic contribution of torsion in terms of the contorsion tensor cal-K. We treat torsion as an external (or a background) field and show that the contribution of torsion to the Einstein equations can be interpreted in terms of the torsion energy-momentum tensor, local conservation of which in a curved spacetime with an arbitrary metric or an arbitrary gravitational field demands a proportionality of the torsion energy--momentum tensor to a metric tensor, a covariant derivative of which vanishes because of the metricity condition. This allows to claim that torsion can serve as origin for vacuum energy density, given by cosmological constant or dark energy density in the Universe. This is a model-independent result may explain a small value of cosmological constant, which is a long--standing problem of cosmology. We show that the obtained result is valid also in the Poincare' gauge gravitational theory by Kibble (T. W. B. Kibble, J. Math. Phys. 2, 212 (1961)), where the Einstein-Hilbert action can be represented in the same form cal-R = R + cal-K^2.
description: 11 pages, no figures, we have corrected the acknowledgements
Minimum Processing Near-end Listening Enhancement
Creators: name: Fuglsig, Andreas Jonas
name: Jensen, Jesper
name: Tan, Zheng-Hua
name: Bertelsen, Lars Søndergaard
name: Lindof, Jens Christian
name: Østergaard, Jan
Publisher: name: arXiv
Year: 2022
Subjects: subject: Audio and Speech Processing (eess.AS)
subject: Sound (cs.SD)
subject: Signal Processing (eess.SP)
subject: FOS: Electrical engineering, electronic engineering, information engineering
subject: FOS: Computer and information sciences

description: The intelligibility and quality of speech from a mobile phone or public announcement system are often affected by background noise in the listening environment. By pre-processing the speech signal it is possible to improve the speech intelligibility and quality -- this is known as near-end listening enhancement (NLE). Although, existing NLE techniques are able to greatly increase intelligibility in harsh noise environments, in favorable noise conditions the intelligibility of speech reaches a ceiling where it cannot be further enhanced. Actually, the focus of existing methods solely on improving the intelligibility causes unnecessary processing of the speech signal and leads to speech distortions and quality degradations. In this paper, we provide a new rationale for NLE, where the target speech is minimally processed in terms of a processing penalty, provided that a certain performance constraint, e.g., intelligibility, is satisfied. We present a closed-form solution for the case where the performance criterion is an intelligibility estimator based on the approximated speech intelligibility index and the processing penalty is the mean-square error between the processed and the clean speech. This produces an NLE method that adapts to changing noise conditions via a simple gain rule by limiting the processing to the minimum necessary to achieve a desired intelligibility, while at the same time focusing on quality in favorable noise situations by minimizing the amount of speech distortions. Through simulation studies, we show the proposed method attains speech quality on par or better than existing methods in both objective measurements and subjective listening tests, whilst still sustaining objective speech intelligibility performance on par with existing methods.