173 research outputs found
International mobility between the UK and Europe around Brexit: a data-driven study
No full textAmong the multiple effects of Brexit, changes in migration and mobility across Europe were expected. Several studies have analysed these aspects, mostly from the point of view of perceptions, motivations, economic effects, scenarios, and changes in migration from Central and Eastern European countries. In this study we propose an analysis of migration and cross-border mobility using an integrated data-driven approach. We investigate official statistics from Eurostat, together with non-traditional data, to give a more complete view of the changes after Brexit, at EU and regional level. Specifically, we employ scientific publication and Crunchbase data to study highly-skilled migration, Twitter and Air Passenger data to investigate monthly trends. While main trends are preserved across datasets, with a general decrease in migration towards the UK immediately after the referendum approval, we are able to also observe more fine grained trends specific to some data or regions. Furthermore, we relate the changes in mobility observed from Air Passenger data with attention to Brexit from Google Trends data
Correction to: Skeletal versus conventional anchorage in dentofacial orthopedics: an international modified Delphi consensus study (Progress in Orthodontics, (2025), 26, 1, (9), 10.1186/s40510-025-00556-4)
No full textCorrection: Progress in Orthodontics (2025) 26:9https://doi.org/10.1186/s40510-025-00556-4. Following publication of the original article [1], the authors identified an error in the author name of Spyridon N. Papageorgiou. The incorrect author name is: Spyridon Papageorgiou. The correct author name is: Spyridon N. Papageorgiou. The author group has been updated above and the original article [1] has been corrected
Homily for the Nativity of Our Lord Jesus Christ in a Sixteenth-Century Codex: The Problem of the Authorship of Spyridon, Metropolitan of Kyiv
No full textThe article was submitted on 03.03.2022.Высказана гипотеза о митрополите Киевском и всея Руси Спиридоне-Саве как авторе «Слова на Рождество Христово», найденного в сборнике конца XV – начала XVI в. из Корнилиево-Комельского монастыря и ранее не затронутого исследователями. Гипотеза обосновывается сравнением гомилии с другими сочинениями, атрибутируемыми Спиридону, а также выделением характерных черт его творчества – авторской телеологии и грецизмов. Материал для подтверждения атрибуции находится в заглавии «Слова на сошествие Святого Духа», которое стилистически перекликается с найденной гомилией. Сюжетное сопоставление «Слова на Рождество» позволяет выделить общий мотив, однозначно связывающий данную гомилию с «Посланием о Мономаховом венце», принадлежность которого перу Спиридона ставили под сомнение. После обобщения всех известных сведений о Спиридоне предлагается концепция, определяющая его участие в политических контактах между Московской Русью, Великим княжеством Литовским и Константинопольским патриархом. На основании летописных известий предлагается пересмотреть взаимоотношения между Спиридоном и Иваном III, покровительство которого может объяснять высокие оценки деятельности Спиридона архиепископом Геннадием, игуменом Досифеем и Максимом Греком. Пересмотрено сообщение Спиридона о его «заточении» в Ферапонтовом монастыре, а также выдвинуто предположение, что осуждение Спиридона и его «проклятие» в ставленых грамотах могут быть вызваны изменением политической ситуации в конце или после правления Ивана III.This article considers the previously unstudied Homily for the Nativity of Our Lord Jesus Christ found in the manuscript of the early sixteenth century from the Kornilievo-Komelsky Monastery. Based on a comparison with other works attributed to Spyridon-Sava and considering the typical features of his works, i. e. his teleology and Graecisms, the author puts forward a hypothesis that the Metropolitan of Kyiv and All Russia is the author of the Homily. The material used by the author to substantiate his attribution is withdrawn from the title of the Homily for the Descent of the Holy Spirit which is stylistically akin to the homily found. The plot comparison of the Homily for the Nativity makes it possible to single out a common motif that unambiguously connects this homily with the Message about the Monomachus’ Crown, whose belonging to Spyridon has been questioned. After summarising all known information about Spyridon, the author puts forward a concept that determines his participation in political contacts between Muscovite Russia, the Grand Duchy of Lithuania, and the Patriarch of Constantinople. Referring to the chronicle entries, the author suggests revising the relationship between Spyridon and Ivan III, whose patronage can explain the high assessment of Spyridon’s activities by Archbishop Gennady, Abbot Dositheus, and Maksim Grek. The author revises Spyridon’s message about his “imprisonment” in the Ferapontov Monastery, suggesting that the condemnation of Spyridon and his “curse” in the charters issued may have been caused by a change in the political situation at the end or after the reign of Ivan III
Mixture models with decreasing weights
No full textFunding Information: The authors are grateful for the comments and suggestions from two reviewers and an Associate Editor on an earlier version of the paper which have contributed to a substantial improvement. This article is dedicated to the memory of Spyridon J. Hatjispyros. A precious advisor, colleague and friend who is greatly missed. Publisher Copyright: © 2022 The Author(s)Decreasing weight prior distributions for mixture models play an important role in nonparametric Bayesian inference. Various random probability measures with decreasing weights have been previously explored and it has been shown that they provide an efficient alternative to the more traditional Dirichlet process mixture model. This ordering of the weights implicitly alleviates the so-called label switching problem, as larger weights correspond to larger groups. A general procedure to define any decreasing weights model based on a characterization of a discrete random variable which also allows for an easy and generic sampling algorithm for estimating the model is provided. An exact representation for the number of expected components is given. Finally, the performance of the mixture model on simulated data sets is investigated numerically.Peer reviewe
Η χρησιμότητα των συλλογικών γεωγραφικών δεδομένων στο χωρικό σχεδιασμό
No full textSpatial and urban planning is a technical and political process which requires various types of data. For example, data about existing land use, environmental pollution data and data about citizens’ satisfaction with regard to urban facilities and services. However, for many cities, the required data is not available or is not up-to-date. Its collection using traditional methods, such as in-situ surveys, requires a significant volume of human and financial resources. In the present PhD research, we examined the use of crowd-sourced data for enriching or replacing data collected using traditional methods. To this end, two case studies have been performed. The first, is about the use of crowd-sourced data for land/building use mapping. In this case study, we developed a method for estimating building block use using place data from Foursquare social media application. This method can be trusted for the estimation of the land use categories “Hotels, restaurants & cafes” and “Retail”. The second case study, is about the use of crowd-sourced data for estimating citizens’ satisfaction with regard to urban facilities and services. To this end, we proposed two indicators which are estimated using Foursquare place data. The proposed indicators can provide robust estimates about citizens’ satisfaction with regard to “Sport facilities”, “Cultural facilities” and “Streets & buildings”. Both case studies proved that by using appropriate methods such as those developed in this PhD research, crowd-sourced data can be used for complementing official statistics collected through traditional methods. The added value of its use, is that it can provide low cost, up-to-date and globally harmonized estimates of land use patterns and of citizen’s satisfaction levels for specific types of services and facilities. These estimates can be used for comparing cities, for identifying changes in land use patterns and in citizens’ satisfaction levels, and lastly for designing effectively in-situ surveys.Ο χωροταξικός και πολεοδομικός σχεδιασμός είναι μια τεχνική και πολιτική διαδικασία που απαιτεί την ύπαρξη δεδομένων διαφορών τύπων, όπως για παράδειγμα, δεδομένα για τις υπάρχουσες χρήσεις γης, δεδομένα για την μόλυνση του περιβάλλοντος και δεδομένα για την ικανοποίηση των πολιτών σχετικά με τις αστικές υποδομές και υπηρεσίες. Η συλλογή των δεδομένων αυτών μέσω των παραδοσιακών μεθόδων, όπως οι επιτόπιες έρευνες, απαιτούν ένα σημαντικό αριθμό ανθρώπινων και οικονομικών πόρων. Στην παρούσα διδακτορική έρευνα εξετάζουμε τη χρήση των συλλογικών (crowdsourced) δεδομένων για τον εμπλουτισμό ή την αντικατάσταση των δεδομένων που συλλέγονται με τις παραδοσιακές μεθόδους. Για το σκοπό αυτό, διεξήχθησαν δύο μελέτες περιπτώσεων (case studies). Η πρώτη, αφορά την χρήση συλλογικών δεδομένων για τη χαρτογράφηση των χρήσεων γης/κτηρίων. Σε αυτή τη μελέτη περίπτωσης αναπτύξαμε μια μέθοδο για την εκτίμηση της χρήσης κτιριακών συγκροτημάτων χρησιμοποιώντας δεδομένα τόπων από το μέσο κοινωνικής δικτύωσης Foursquare. Η μέθοδος αυτή αποδείχθηκε αξιόπιστη για την εκτίμηση των κατηγοριών χρήσης γης "Ξενοδοχεία, εστιατόρια και καφέ" και "Λιανικό εμπόριο". Η δεύτερη μελέτη περίπτωσης, αφορά την χρήση συλλογικών δεδομένων για την εκτίμηση της ικανοποίησης των πολιτών σε σχέση με τις αστικές υποδομές και υπηρεσίες. Για το σκοπό αυτό, προτάθηκαν δύο δείκτες οι οποίοι υπολογίζονται βάση δεδομένων τόπων από το Foursquare. Οι προτεινόμενοι δείκτες μπορούν να παρέχουν αξιόπιστες εκτιμήσεις σχετικά με την ικανοποίηση των πολιτών όσον αφορά τις "Αθλητικές εγκαταστάσεις", τις "Πολιτιστικές εγκαταστάσεις" και τους "Δρόμους & κτίρια". Και οι δύο μελέτες περιπτώσεων απέδειξαν ότι χρησιμοποιώντας τις κατάλληλες μεθόδους, όπως αυτές που αναπτύχθηκαν στην παρούσα διδακτορική έρευνα, τα συλλογικά δεδομένα μπορούν να χρησιμοποιηθούν συμπληρωματικά ως προς τα επίσημα στατιστικά δεδομένα που συλλέγονται μέσω παραδοσιακών μεθόδων. Η προστιθέμενη αξία της χρήσης των δεδομένων αυτών, είναι ότι παρέχουν αξιόπιστες, χαμηλού κόστους, ενήμερες, και εναρμονισμένες σε υπερεθνικό επίπεδο εκτιμήσεις χρήσεων γης και εκτιμήσεις επιπέδων ικανοποίησης των πολιτών για συγκεκριμένους τύπους υπηρεσιών και υποδομών. Οι εκτιμήσεις αυτές δύναται να χρησιμοποιηθούν για τη σύγκριση πόλεων, τον εντοπισμό αλλαγών στις χρήσης γης και στα επίπεδα ικανοποίησης των πολιτών, και τέλος, για τον καλύτερο σχεδιασμό επιτόπιων ερευνών
The impact of air travel on the precocity and severity of COVID-19 deaths in sub-national areas across 45 countries
No full textHuman travel fed the worldwide spread of COVID-19, but it remains unclear whether the volume of incoming air passengers and the centrality of airports in the global airline network made some regions more vulnerable to earlier and higher mortality. We assess whether the precocity and severity of COVID-19 deaths were contingent on these measures of air travel intensity, adjusting for differences in local non-pharmaceutical interventions and pre-pandemic structural characteristics of 502 sub-national areas on five continents in April–October 2020. Ordinary least squares (OLS) models of precocity (i.e., the timing of the 1st and 10th death outbreaks) reveal that neither airport centrality nor the volume of incoming passengers are impactful once we consider pre-pandemic demographic characteristics of the areas. We assess severity (i.e., the weekly death incidence of COVID-19) through the estimation of a generalized linear mixed model, employing a negative binomial link function. Results suggest that COVID-19 death incidence was insensitive to airport centrality, with no substantial changes over time. Higher air passenger volume tends to coincide with more COVID-19 deaths, but this relation weakened as the pandemic proceeded. Different models prove that either the lack of airports in a region or total travel bans did reduce mortality significantly. We conclude that COVID-19 importation through air travel followed a ‘travel as spark’ principle, whereby the absence of air travel reduced epidemic risk drastically. However, once some travel occurred, its impact on the severity of the pandemic was only in part associated with the number of incoming passengers, and not at all with the position of airports in the global network of airline connections
The Consecration of Metropolitan Spyridon in the Context of the Epistle of Misael 1476
No full textМета дослідження – розглянути висвяту у Царгороді у середині 1470-х рр.
ченця Спиридона на київського митрополита у ситуації, яка склалася в Київській митрополії
після Флорентійської унії 1439 р., із залученням свідчень «Послання Мисаїла» 1476 р.
про конфесійні настрої й акції русько-литовської церковної і світської еліти. Методологія.
Застосовано історіографічний та джерельний аналіз для виявлення нових можливих
прочитань біографічних даних про Спиридона. Наукова новизна. Запропоновано нове
тлумачення місії Спиридона в Константинополі й, відповідно, осіб, які за нею стояли. Також
скориговано датування втечі / звільнення його з ув’язнення в Литві. Висновки. Підсумовуючи
наявні джерельні та літописні свідчення, зауважено про необґрунтованість датування поділу
Київської митрополії 1448-м чи 1458-м роками. Дії всіх зацікавлених осіб указують на те, що
навіть наприкінці 1460‑х рр. вони мислили її неподільною і прагнули контролювати всю її
територію. При цьому дії польсько-литовського монарха Казимира IV щодо митрополита
Григорія Болгариновича свідчать про намагання усталити новий modus vivendi для підвладних
йому русинів грецької віри, передбачаючи подвійну юрисдикційну підлеглість як Риму,
так і Константинополю. Вибір Мисаїла на митрополичу кафедру на початку 1473 р. було
зроблено насамперед з огляду на перспективність його визнання на контрольованих Москвою
територіях. Відповідні уривки «Послання Мисаїла» 1476 р. свідчать про продовження
політики подвійного співпричастя та її підтримку руською церковною і світською елітою.
Під цим оглядом стає очевидною не лише причина посольства Спиридона до Царгорода, а й
значення літописних звісток про вдачу посланця та здобуття митрополичого сану підкупом.The paper aims at shedding a new light on the consecration of the monk Spyridon
the Metropolitan of Kyiv in the mid-1470s in Constantinople, considering the situation in the
Kyiv metropolitanate after the Florentine Union (1439) with a due regard to the witness of
the Epistle of Misael (1476) concerning the confessional attitude and actions of the Ruthenian
and Lithuanian secular and spiritual elite. On the basis of historiographical and source analysis
the author discovers new possible readings of Spyridon the Satan’s biographical data and proposes
a new interpretation of his mission to Constantinople and identification of patrons behind him.
The author also adjusted the date of Spyridon’s escape or release from imprisonment in Lithuania.
The author considers the dating of the division of Kyiv metropolitanate by 1448 or 1458
ungrounded. The documents and behavior of all interested parties indicate that even in the late
1460s they regarded it as a unit and tried to control its entire territory. Furthermore, the actions of
the Polish-Lithuanian monarch Casimir IV with regard to Metropolitan Hryhorii Bolharynovych
testify to his attempt to introduce a new modus vivendi for the Orthodox Ruthenians by providing
them with a dual jurisdiction: both of Rome and of Constantinople. The election of Misael
for the metropolitan see of Kyiv in early 1473 was made primarily in view of the prospects for
his recognition in the territories controlled by Moscow. Some passages of the Epistle of Misael of
1476 testify to the continuing policy of double communion and its support by the Ruthenian
secular and spiritual elite. This approach reveals not only the reason for Spyridon’s embassy in
Constantinople, but also the importance of chronicles’ information on cunning nature of the
envoy and acquisition of the Metrpolitan dignity by bribery
Sub-National COVID-19 Incidence and Determinants Dataset
No full textThe Sub-National COVID-19 Incidence and Determinants Dataset contains rich sub-national data on COVID-19 cases and deaths combined with data on factors associated with the spread and severity of COVID-19 outbreaks in 2020. The data covers 503 sub-national areas (NUTS-2 level and equivalents) of 46 countries in five continents (Europe, Asia, North America, South America and Oceania). Indicators were mostly gathered weekly, with the exception of some variables that are monthly and yearly. The dataset was compiled to study the determinants of COVID-19 outbreaks with a focus on the effects of international airline travel. However, the data are useful to investigate also other questions on the sub-national diffusion of COVID-19. The information used to build this dataset was drawn from a variety of sources in order to cover four major areas of interest: health outcomes of the pandemic (COVID-19 cases and deaths), international air travel (number of incoming air passengers, centrality of local airports in the global airline network and air travel limitation policies), population mixing and government policy responses, and pre-pandemic area characteristics (socioeconomic, demographic, public health and co-morbidity). A complete list of sources can be found in the “Data sources” Pdf document attached.
Please cite as: Recchi, E., A. Ferrara, A. Rodríguez Sánchez, E. Deutschmann, L. Gabrielli, S. Iacus, L. Bastiani, S. Spyratos & M. Vespe. 2022. The Impact of Air Travel on the Precocity and Severity of Covid-19 Deaths in Sub-National Areas across 45 Countries. Scientific Reports 12: 16522. https://doi.org/10.1038/s41598-022-20263-
Characteristics of Citizen-contributed Geographic Information
No full textCurrent Internet applications have been increasingly incorporating citizen-contributed geographic information (CCGI) with much heterogeneous characteristics. Nevertheless, despite their differences, several terms are often being used interchangeably to define CCGI types, in the existing literature. As a result, the notion of CCGI has to be carefully specified, in order to avoid vagueness, and to facilitate the choice of a suitable CCGI dataset to be used for a given application. To address the terminological ambiguity in the description of CCGI types, we propose a typology of GI and a theoretical framework for the evaluation of GI in terms of data quality, number and type of contributors and cost of data collection per observation. We distinguish between CCGI explicitly collected for scientific or socially-oriented purposes. We review 27 of the main Internet-based CCGI platforms and we analyse their characteristics in terms of purpose of the data collection, use of quality assurance and quality control (QA/QC) mechanisms, thematic category, and geographic extents of the collected data. Based on the proposed typology and the analysis of the platforms, we conclude that CCGI differs in terms of data quality, number of contributors, data collection cost and the application of QA/QC mechanisms, depending on the purpose of the data collection.JRC.H.6 - Digital Earth and Reference Dat
Characteristics of Citizen-contributed Geographic Information
No full textPonencias, comunicaciones y pósters presentados en el 17th AGILE Conference on Geographic Information Science
"Connecting a Digital Europe through Location and Place", celebrado en la Universitat Jaume I del 3 al 6 de junio de 2014.Current Internet applications have been increasingly incorporating citizen-contributed geographic information (CCGI) with much heterogeneous characteristics. Nevertheless, despite their differences, several terms are often being used interchangeably to define CCGI types, in the existing literature. As a result, the notion of CCGI has to be carefully specified, in order to avoid vagueness, and to facilitate the choice of a suitable CCGI dataset to be used for a given application. To address the terminological ambiguity in the description of CCGI types, we propose a typology of GI and a theoretical framework for the evaluation of GI in terms of data quality, number and type of contributors and cost of data collection per observation. We distinguish between CCGI explicitly collected for scientific or socially-oriented purposes. We review 27 of the main Internet-based CCGI platforms and we analyse their characteristics in terms of purpose of the data collection, use of quality assurance and quality control (QA/QC) mechanisms, thematic category, and geographic extents of the collected data. Based on the proposed typology and the analysis of the platforms, we conclude that CCGI differs in terms of data quality, number of contributors, data collection cost and the application of QA/QC mechanisms, depending on the purpose of the data collection
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