697 research outputs found
Challenges and Opportunities in Exascale-Computing Interconnects
No full textKeynote Talk, given by Manolis Katevenis and Nikolaos Chrysos, at the 1st International Workshop on Advanced Interconnect Solutions and Technologies for Emerging Computing Systems (AISTECS 2016), held in conjunction with the HiPEAC 2016 Conference, Prague, Czech Republic, 18 January 2016
Nikolaos Politis: Study on the life of modern Greeks
No full textTitle: Μελέτη ἐπί τοῦ βίου τῶν νεοτέρων Ἑλλήνων (Study on the life of modern Greeks) Originally published: in Τόμος Α’ (vol. I), ‘Νεοελληνική Μυθολογία’ of the four-volume Μελέτη ἐπί τοῦ βίου τῶν νεοτέρων Ἑλλήνων (Athens: τύποις Σαραντάκος Οἰκονόμου, 1871). Language: Greek The excerpts used are from the original, Preface, pp. α’- γ.’ About the author Nikolaos Politis [1852, Kalamata..
Kurbinovo, Georgskirche
No full textBeschriftung Hallensleben:„Kurbinovo, H. Georgios, 1191 / Apsis, Zone II, Südseite / [Bild] / Patriarchen bzw. Bischöfe (Chrysos- / tomos, Athanas., Achilleios, Nikolaos“ [Plan siehe 023-182]http://difab.univie.ac.at (Digitales Forschungsarchiv Byzanz
The Early Byzantine Domed Basilicas of West Asia Minor, An essay in Graphic Reconstruction
No full textThis paper investigates the methodology employed in the recent survey and reconstruction of the major Early Byzantine domed churches of west Asia Minor. This involved both the documentation of construction details as well as their interpretation by reference to coeval monuments elsewhere. Focusing on this methodology, the author explores techniques of graphic recording and the theoretical framework within which parallels with other buildings can inform the work of reconstruction. The detailed examination of two case studies illustrates the way in which seemingly random scraps of testimony were interpreted to provide evidence for the missing superstructure of the churches. These case studies also serve to explore the adaptation of the methodology to sites with different characteristics and help to assess the credibility of the resulting graphic reconstructions
Author self-citation in orthodontics is associated with author origin and gender.
No full textBACKGROUND
The aims of this bibliometric study were to determine author self-citation trends in high-impact orthodontic literature and to investigate possible association between self-citation and publication characteristics.
METHODS
Six orthodontic journals with the highest impact factor as ranked by 2017 Journal Citation Reports were screened for a full publication year (2018) for original research articles, reviews, and case reports. Eligible articles were scrutinized for article and author characteristics and citation metrics. Univariable and multivariable negative binomial regression was used to examine associations between self-citation incidence and publication characteristics.
RESULTS
Medians for author self-citation rate of the most self-citing authors and self-citations were 3.03% (range 0-50) and 1 (range 0-19), respectively. In the univariable analysis, there was no association between self-citation counts and study type (P = 0.41), article topic (P = 0.61), number of authors (P = 0.62), and rank of authors (P = 0.56). Author origin (P = 0.001), gender (P = 0.001) and journal (P = 0.05) were associated with self-citation counts and in the multivariable analysis only origin and gender remained strong self-citation predictors. Asian authors and females self-cited significantly less often than all other regions and male authors.
CONCLUSIONS
Authors in orthodontics do not self-cite at a frequency that suggests potential citation manipulation. Author origin and gender were the only variables associated with citations counts. More bibliometric research is necessary to draw solid conclusions about author self-citation trends in orthodontic literature
Information theory methods in communication complexity
No full textThis dissertation is concerned with the application of notions and methods from the field of information theory to the field of communication complexity. It consists of two main parts. In the first part of the dissertation, we prove lower bounds on the randomized two-party communication complexity of functions that arise from read-once boolean formulae. A read-once boolean formula is a formula in propositional logic with the property that every variable appears exactly once. Such a formula can be represented by a tree, where the leaves correspond to variables, and the internal nodes are labeled by binary connectives. Under certain assumptions, this representation is unique. Thus, one can define the depth of a formula as the depth of the tree that represents it. The complexity of the evaluation of general read-once formulae has attracted interest mainly in the decision tree model. In the communication complexity model many interesting results deal with specific read-once formulae, such as disjointness and tribes. In this dissertation we use information theory methods to prove lower bounds that hold for any read-once formula. Our lower bounds are of the form n(f )/c^d(f ) , where n(f ) is the number of variables and d(f ) is the depth of the formula, and they are optimal up to the constant in the base of the denominator. In the second part of the dissertation, we explore the applicability of the information-theoretic method in the number-on-the-forehead model. The work of Bar-Yossef, Jayram, Kumar & Sivakumar [BYJKS04] revealed a beautiful connection between Hellinger distance and two-party randomized communication protocols. Inspired by their work and motivated by the open questions in the number-on-the-forehead model, we introduce the notion of Hellinger volume. We show that it lower bounds the information cost of multi-party protocols. We provide a small toolbox that allows one to manipulate several Hellinger volume terms and also to lower bound a Hellinger volume when the distributions involved satisfy certain conditions. In doing so, we prove a new upper bound on the difference between the arithmetic mean and the geometric mean in terms of relative entropy. Finally, we show how to apply the new tools to obtain a lower bound on the informational complexity of the ANDk function.Ph. D.Includes bibliographical referencesby Nikolaos Leonardo
Nikolaos Mesarites, Description of the Church of the Holy Apostles at Constantinople. New critical perspectives.
No full textThis study offers a reappraisal of Nikolaos Mesarites’ Description of the church of the Holy Apostles at Constantinople, by providing new insights into its genre and the context of its composition. By concentrating on the text’s encomiastic features, the first part of the study retraces its carefully carved rhetorical construction. The second part analyses the so far neglected concluding section of the Description, in which the author, by hinting at the current historical juncture – the very years preceding the fourth Crusade – would seem to disclose a specific purpose for its composition. Finally, an hypothesis for dating the Description is also suggested, with the intention of defining it further in a forthcoming dedicated article.
Correction: Operative management of acute abdomen after bariatric surgery in the emergency setting: the OBA guidelines (World Journal of Emergency Surgery, (2022), 17, 1, (51), 10.1186/s13017-022-00452-w)
No full textFollowing publication of the original article [1], the co-author “Nikolaos Pararas” has misspelled wrongly as “Nikolaos Parasas”. The original article has been corrected. © The Author(s) 2022
"Preliminary Dissemination Report", ExaNeSt project Deliverable D7.1
No full textDissemination of research results is an extremely important part of an H2020 European funded project. Effective dissemination will ensure that the project is widely adopted and used across Europe. Project partners are all deeply aware of the need of disseminating project results to those who will use ExaNeSt to build new HPC facilities, and to scientific communities and those SMEs who may ask for and use ExaNeSt powerful platform. The dissemination activities have already encompassed printed and electronic media/publications, workshops, demos, networking, conferences and a project website. The project partners will continue to disseminate ExaNeSt results to a broad audience of data sciences and to SMEs in the emerging HPC market. All the Member States of the EU-28 as well as key non-EU markets will be targeted to ensure the widest possible uptake of the new technologies developed within the project. Existing networks and contacts will be exploited as well as industry associations, consortiums and groups. This document presents the preliminary dissemination activities (in the first 12 months) undertaken against targets set out in the DoA for the ExaNeSt H2020 project.ExaNeSt project Deliverable D7.
Correction: Operative management of acute abdomen after bariatric surgery in the emergency setting: the OBA guidelines (World Journal of Emergency Surgery, (2022), 17, 1, (51), 10.1186/s13017-022-00452-w)
No full textFollowing publication of the original article [1], the co-author “Nikolaos Pararas” has misspelled wrongly as “Nikolaos Parasas”. The original article has been corrected
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